-/* Tags file maker to go with GNU Emacs
- Copyright (C) 1984, 1987, 1988, 1989, 1993 Free Software Foundation, Inc. and Ken Arnold
-
-This file is not considered part of GNU Emacs.
-
-This program is free software; you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation; either version 2 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-/*
- * Authors:
- * Ctags originally by Ken Arnold.
- * FORTRAN added by Jim Kleckner.
- * Ed Pelegri-Llopart added C typedefs.
- * Gnu Emacs TAGS format and modifications by RMS?
- * Sam Kendall added C++.
- *
- * Francesco Potorti` (pot@cnuce.cnr.it) is the current maintainer. 10.7
- */
-
-#ifdef MSDOS
-#include <fcntl.h>
-#endif /* MSDOS */
-
-#ifdef HAVE_CONFIG_H
-#include <../src/config.h>
-#endif
-
-#include <stdio.h>
-#include <ctype.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-
-#if !defined (S_ISREG) && defined (S_IFREG)
-# define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
-#endif
-
-#include "getopt.h"
-
-extern char *getenv ();
-
-char *etags_index (), *etags_rindex ();
-char *savenstr ();
-
-/* Define the symbol ETAGS to make the program "etags",
- which makes emacs-style tag tables by default.
- Define CTAGS to make the program "ctags" compatible with the usual one.
- Define neither one to get behavior that depends
- on the name with which the program is invoked
- (but we don't normally compile it that way). */
-
-#if !defined(ETAGS) && !defined(CTAGS)
-/* If neither is defined, program can be run as either. */
-#define ETAGS
-#define CTAGS
-#endif
-
-/* On VMS, CTAGS is not useful, so always do ETAGS. */
-#ifdef VMS
-#ifndef ETAGS
-#define ETAGS
-#endif
-#endif
-
-/* Exit codes for success and failure. */
-#ifdef VMS
-#define GOOD (1)
-#define BAD (0)
-#else
-#define GOOD (0)
-#define BAD (1)
-#endif
-
-/*
- * The FILEPOS abstract type, which represents a position in a file,
- * plus the following accessor functions:
- *
- * long GET_CHARNO (pos)
- * returns absolute char number.
- * void SET_FILEPOS (pos, fp, charno)
- * FILE *fp; long charno;
- * sets `pos' from the current file
- * position of `fp' and from `charno',
- * which must be the absolute character
- * number corresponding to the current
- * position of `fp'.
- *
- * The `pos' parameter is an lvalue expression of type FILEPOS.
- * Parameters to the accessor functions are evaluated 0 or more times,
- * and so must have no side effects.
- *
- * FILEPOS objects can also be assigned and passed to and from
- * functions in the normal C manner.
- *
- * Implementation notes: the `+ 0' is to enforce rvalue-ness.
- */
-
-#ifndef DEBUG
- /* real implementation */
-typedef long FILEPOS;
-#define GET_CHARNO(pos) ((pos) + 0)
-#define SET_FILEPOS(pos, fp, cno) ((void) ((pos) = (cno)))
-#else
- /* debugging implementation */
-typedef struct
-{
- long charno;
-} FILEPOS;
-
-#define GET_CHARNO(pos) ((pos).charno + 0)
-#define SET_FILEPOS(pos, fp, cno) \
- ((void) ((pos).charno = (cno), \
- (cno) != ftell (fp) ? (error ("SET_FILEPOS inconsistency"), 0) \
- : 0))
-#endif
-
-#define streq(s, t) (strcmp (s, t) == 0)
-#define strneq(s, t, n) (strncmp (s, t, n) == 0)
-#define logical int
-
-#define TRUE 1
-#define FALSE 0
-
-#define iswhite(arg) (_wht[arg]) /* T if char is white */
-#define begtoken(arg) (_btk[arg]) /* T if char can start token */
-#define intoken(arg) (_itk[arg]) /* T if char can be in token */
-#define endtoken(arg) (_etk[arg]) /* T if char ends tokens */
-
-#define max(I1,I2) ((I1) > (I2) ? (I1) : (I2))
-
-struct nd_st
-{ /* sorting structure */
- char *name; /* function or type name */
- char *file; /* file name */
- logical is_func; /* use pattern or line no */
- logical named; /* list name separately */
- logical been_warned; /* set if noticed dup */
- int lno; /* line number tag is on */
- long cno; /* character number line starts on */
- char *pat; /* search pattern */
- struct nd_st *left, *right; /* left and right sons */
-};
-
-long ftell ();
-typedef struct nd_st NODE;
-
-logical header_file; /* TRUE if .h file, FALSE o.w. */
-/* boolean "functions" (see init) */
-logical _wht[0177], _etk[0177], _itk[0177], _btk[0177];
-
-
-char *concat ();
-char *savenstr ();
-char *savestr ();
-char *xmalloc ();
-char *xrealloc ();
-int L_isdef (), L_isquote ();
-int PF_funcs ();
-int total_size_of_entries ();
-logical consider_token ();
-logical tail ();
-long readline ();
-void Asm_funcs ();
-void C_entries ();
-void L_funcs ();
-void L_getit ();
-void PAS_funcs ();
-void Scheme_funcs ();
-void TEX_funcs ();
-void add_node ();
-void error ();
-void fatal ();
-logical find_entries ();
-void free_tree ();
-void getit ();
-void init ();
-void initbuffer ();
-void initbuffer ();
-void pfnote ();
-void process_file ();
-void put_entries ();
-void takeprec ();
-
-/*
- * MACRO
- * xnew -- allocate storage
- *
- * SYNOPSIS
- * Type *xnew (int n, Type);
- */
-#define xnew(n, Type) ((Type *) xmalloc ((n) * sizeof (Type)))
-
-/*
- * Symbol table types.
- */
-enum sym_type
-{
- st_none, st_C_struct, st_C_enum, st_C_define, st_C_typedef, st_C_typespec
-};
-\f
-
-
-typedef int LINENO;
-
-typedef struct
-{
- char *p;
- int len;
- LINENO lineno;
- logical named;
-} TOKEN;
-
-/* C extensions.
- */
-#define C_PLPL 0x00001 /* C++ */
-#define C_STAR 0x00003 /* C* */
-#define YACC 0x10000 /* yacc file */
-
-char searchar = '/'; /* use /.../ searches */
-
-LINENO lineno; /* line number of current line */
-long charno; /* current character number */
-
-long linecharno; /* charno of start of line; not used by C, but
- * by every other language.
- */
-
-char *curfile, /* current input file name */
- *outfile, /* output file */
- *white = " \f\t\n", /* white chars */
- *endtk = " \t\n\"'#()[]{}=-+%*/&|^~!<>;,.:?", /* token ending chars */
- /* token starting chars */
- *begtk = "ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz$~",
- /* valid in-token chars */
- *intk = "ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz$0123456789";
-
-int append_to_tagfile; /* -a: append to tags */
-int emacs_tags_format; /* emacs style output (no -e option any more) */
-/* The following three default to 1 for etags, but to 0 for ctags. */
-int typedefs; /* -t: create tags for typedefs */
-int typedefs_and_cplusplus; /* -T: create tags for typedefs, level */
- /* 0 struct/enum/union decls, and C++ */
- /* member functions */
-int constantypedefs; /* -d: create tags for C #define and enum */
- /* constants. Default under etags. Enum */
- /* constants not implemented. */
- /* -D: opposite of -d. Default under ctags. */
-int update; /* -u: update tags */
-int vgrind_style; /* -v: create vgrind style index output */
-int no_warnings; /* -w: suppress warnings */
-int cxref_style; /* -x: create cxref style output */
-int cplusplus; /* .[hc] means C++, not C */
-int noindentypedefs; /* -S: ignore indentation in C */
-
-/* Name this program was invoked with. */
-char *progname;
-
-struct option longopts[] = {
- { "append", no_argument, NULL, 'a' },
- { "backward-search", no_argument, NULL, 'B' },
- { "c++", no_argument, NULL, 'C' },
- { "cxref", no_argument, NULL, 'x' },
- { "defines", no_argument, NULL, 'd' },
- { "forward-search", no_argument, NULL, 'F' },
- { "help", no_argument, NULL, 'H' },
- { "ignore-indentation", no_argument, NULL, 'S' },
- { "include", required_argument, NULL, 'i' },
- { "no-defines", no_argument, NULL, 'D' },
- { "no-warn", no_argument, NULL, 'w' },
- { "output", required_argument, NULL, 'o' },
- { "typedefs", no_argument, NULL, 't' },
- { "typedefs-and-c++", no_argument, NULL, 'T' },
- { "update", no_argument, NULL, 'u' },
- { "version", no_argument, NULL, 'V' },
- { "vgrind", no_argument, NULL, 'v' },
- { 0 }
-};
-
-FILE *inf, /* ioptr for current input file */
- *outf; /* ioptr for tags file */
-
-NODE *head; /* the head of the binary tree of tags */
-
-int permit_duplicates = 1; /* Nonzero means allow duplicate tags. */
-
-/* A `struct linebuffer' is a structure which holds a line of text.
- `readline' reads a line from a stream into a linebuffer
- and works regardless of the length of the line. */
-
-struct linebuffer
-{
- long size;
- char *buffer;
-};
-
-struct linebuffer lb; /* the current line */
-struct linebuffer filename_lb; /* used to read in filenames */
-struct
-{
- FILEPOS linepos;
- struct linebuffer lb; /* used by C_entries instead of lb */
-} lbs[2];
-\f
-void
-print_version ()
-{
-#ifdef CTAGS
- printf ("CTAGS ");
-#ifdef ETAGS
- printf ("and ");
-#endif
-#endif
-#ifdef ETAGS
- printf ("ETAGS ");
-#endif
- printf ("for Emacs version 19.\n");
-
- exit (GOOD);
-}
-
-void
-print_help ()
-{
- printf ("These are the options accepted by %s. You may use unambiguous\n\
-abbreviations for the long option names. A - as file name means read file\n\
-names from stdin.\n\n", progname);
-
- puts ("-a, --append\n\
- Append tag entries to existing tags file.");
-
-#ifdef CTAGS
- puts ("-B, --backward-search\n\
- Write the search commands for the tag entries using '?', the\n\
- backward-search command.");
-#endif
-
- puts ("-C, --c++\n\
- Treat files with `.c' and `.h' extensions as C++ code, not C\n\
- code. Files with `.C', `.H', `.cxx', `.hxx', or `.cc'\n\
- extensions are always assumed to be C++ code.");
-
-#ifdef ETAGS
- puts ("-d, --defines\n\
- Create tag entries for #defines, too. This is the default\n\
- behavior.");
-#else
- puts ("-d, --defines\n\
- Create tag entries for #defines, too.");
-#endif
-
-#ifdef CTAGS
- puts ("-D, --no-defines\n\
- Don't create tag entries for #defines. This is the default\n\
- behavior.");
-#else
- puts ("-D, --no-defines\n\
- Don't create tag entries for #defines.");
-#endif
-
-#ifdef CTAGS
- puts ("-F, --forward-search\n\
- Write the search commands for the tag entries using '/', the\n\
- forward-search command.");
-#endif
-
-
-#ifdef ETAGS
- puts ("-i FILE, --include=FILE\n\
- Include a note in tag file indicating that, when searching for\n\
- a tag, one should also consult the tags file FILE after\n\
- checking the current file.");
-#endif
-
- puts ("-o FILE, --output=FILE\n\
- Write the tags to FILE.");
- puts ("-S, --ignore-indentation\n\
- Don't rely on indentation quite as much as normal. Currently,\n\
- this means not to assume that a closing brace in the first\n\
- column is the final brace of a function or structure\n\
- definition.");
- puts ("-t, --typedefs\n\
- Generate tag entries for typedefs. This is the default\n\
- behavior.");
- puts ("-T, --typedefs-and-c++\n\
- Generate tag entries for typedefs, struct/enum/union tags, and\n\
- C++ member functions.");
-
-#ifdef CTAGS
- puts ("-u, --update\n\
- Update the tag entries for the given files, leaving tag\n\
- entries for other files in place. Currently, this is\n\
- implemented by deleting the existing entries for the given\n\
- files and then rewriting the new entries at the end of the\n\
- tags file. It is often faster to simply rebuild the entire\n\
- tag file than to use this.");
- puts ("-v, --vgrind\n\
- Generates an index of items intended for human consumption,\n\
- similar to the output of vgrind. The index is sorted, and\n\
- gives the page number of each item.");
- puts ("-x, --cxref\n\
- Like --vgrind, but in the style of cxref, rather than vgrind.\n\
- The output uses line numbers instead of page numbers, but\n\
- beyond that the differences are cosmetic; try both to see\n\
- which you like.");
- puts ("-w, --no-warn\n\
- Suppress warning messages about entries defined in multiple\n\
- files.");
-#endif
-
- puts ("-V, --version\n\
- Print the version of the program.\n\
--H, --help\n\
- Print this help message.");
-
- exit (GOOD);
-}
-
-\f
-void
-main (argc, argv)
- int argc;
- char *argv[];
-{
- char cmd[100];
- int i;
- unsigned int nincluded_files = 0;
- char **included_files = xnew (argc, char *);
- char *this_file;
-#ifdef VMS
- char got_err;
-
- extern char *gfnames ();
- extern char *massage_name ();
-#endif
-
-#ifdef MSDOS
- _fmode = O_BINARY; /* all of files are treated as binary files */
-#endif /* MSDOS */
-
- progname = argv[0];
-
-#ifndef CTAGS
- emacs_tags_format = 1;
-#else
- emacs_tags_format = 0;
-#endif
-
- /*
- * If etags, always find typedefs and structure tags. Why not?
- * Also default is to find macro constants.
- */
- if (emacs_tags_format)
- typedefs = typedefs_and_cplusplus = constantypedefs = 1;
-
- for (;;)
- {
- int opt;
- opt = getopt_long (argc, argv, "aACdDo:f:StTi:BFuvxwVH", longopts, 0);
-
- if (opt == EOF)
- break;
-
- switch (opt)
- {
- case '\0':
- /* If getopt returns '\0', then it has already processed a
- long-named option. We should do nothing. */
- break;
-
- /* Common options. */
- case 'a':
- append_to_tagfile++;
- break;
- case 'C':
- cplusplus = 1;
- break;
- case 'd':
- constantypedefs = 1;
- break;
- case 'D':
- constantypedefs = 0;
- break;
- case 'f':
- case 'o':
- if (outfile)
- {
- fprintf (stderr,
- "%s: -%c flag may only be given once\n", progname, opt);
- goto usage;
- }
- outfile = optarg;
- break;
- case 'S':
- noindentypedefs++;
- break;
- case 't':
- typedefs++;
- break;
- case 'T':
- typedefs++;
- typedefs_and_cplusplus++;
- break;
- case 'V':
- print_version ();
- break;
- case 'H':
- print_help ();
- break;
-
- /* Etags options */
- case 'i':
- if (!emacs_tags_format)
- goto usage;
- included_files[nincluded_files++] = optarg;
- break;
-
- /* Ctags options. */
- case 'B':
- searchar = '?';
- if (emacs_tags_format)
- goto usage;
- break;
- case 'F':
- searchar = '/';
- if (emacs_tags_format)
- goto usage;
- break;
- case 'u':
- update++;
- if (emacs_tags_format)
- goto usage;
- break;
- case 'v':
- vgrind_style++;
- /*FALLTHRU*/
- case 'x':
- cxref_style++;
- if (emacs_tags_format)
- goto usage;
- break;
- case 'w':
- no_warnings++;
- if (emacs_tags_format)
- goto usage;
- break;
-
- default:
- goto usage;
- }
- }
-
- if (optind == argc && nincluded_files == 0)
- {
- fprintf (stderr, "%s: No input files specified.\n", progname);
-
- usage:
- fprintf (stderr, "%s: Try `%s --help' for a complete list of options.\n",
- progname, progname);
- exit (BAD);
- }
-
- if (outfile == 0)
- {
- outfile = emacs_tags_format ? "TAGS" : "tags";
- }
-
- init (); /* set up boolean "functions" */
-
- initbuffer (&lb);
- initbuffer (&lbs[0].lb);
- initbuffer (&lbs[1].lb);
- initbuffer (&filename_lb);
- /*
- * loop through files finding functions
- */
- if (emacs_tags_format)
- {
- if (streq (outfile, "-"))
- outf = stdout;
- else
- outf = fopen (outfile, append_to_tagfile ? "a" : "w");
- if (outf == NULL)
- {
- perror (outfile);
- exit (BAD);
- }
- }
-
-#ifdef VMS
- argc -= optind;
- argv += optind;
- while (gfnames (&argc, &argv, &got_err) != NULL)
- {
- if (got_err)
- {
- error ("Can't find file %s\n", this_file);
- argc--, argv++;
- }
- else
- {
- this_file = massage_name (this_file);
-#if 0
- }
- } /* solely to balance out the ifdef'd parens above */
-#endif
-#else
- for (; optind < argc; optind++)
- {
- this_file = argv[optind];
-#endif
- /* Input file named "-" means read file names from stdin and use them. */
- if (streq (this_file, "-"))
- {
- while (!feof (stdin))
- {
- (void) readline (&filename_lb, stdin);
- if (strlen (filename_lb.buffer) > 0)
- process_file (filename_lb.buffer);
- }
- }
- else
- process_file (this_file);
- }
-
- if (emacs_tags_format)
- {
- while (nincluded_files-- > 0)
- fprintf (outf, "\f\n%s,include\n", *included_files++);
-
- (void) fclose (outf);
- exit (GOOD);
- }
-
- if (cxref_style)
- {
- put_entries (head);
- exit (GOOD);
- }
- if (update)
- {
- /* update cannot be set under VMS, so we may assume that argc
- and argv have not been munged. */
- for (i = optind; i < argc; i++)
- {
- sprintf (cmd,
- "mv %s OTAGS;fgrep -v '\t%s\t' OTAGS >%s;rm OTAGS",
- outfile, argv[i], outfile);
- (void) system (cmd);
- }
- append_to_tagfile++;
- }
- outf = fopen (outfile, append_to_tagfile ? "a" : "w");
- if (outf == NULL)
- {
- perror (outfile);
- exit (GOOD);
- }
- put_entries (head);
- (void) fclose (outf);
- if (update)
- {
- sprintf (cmd, "sort %s -o %s", outfile, outfile);
- (void) system (cmd);
- }
- exit (GOOD);
-}
-
-
-/*
- * This routine is called on each file argument.
- */
-void
-process_file (file)
- char *file;
-{
- struct stat stat_buf;
-
- if (stat (file, &stat_buf) == 0 && !S_ISREG (stat_buf.st_mode))
- {
- fprintf (stderr, "Skipping %s: it is not a regular file.\n", file);
- return;
- }
- if (streq (file, outfile) && !streq (outfile, "-"))
- {
- fprintf (stderr, "Skipping inclusion of %s in self.\n", file);
- return;
- }
- if (!find_entries (file))
- {
- return;
- }
- if (emacs_tags_format)
- {
- fprintf (outf, "\f\n%s,%d\n", file, total_size_of_entries (head));
- put_entries (head);
- free_tree (head);
- head = NULL;
- }
-}
-
-/*
- * This routine sets up the boolean pseudo-functions which work
- * by setting boolean flags dependent upon the corresponding character
- * Every char which is NOT in that string is not a white char. Therefore,
- * all of the array "_wht" is set to FALSE, and then the elements
- * subscripted by the chars in "white" are set to TRUE. Thus "_wht"
- * of a char is TRUE if it is the string "white", else FALSE.
- */
-void
-init ()
-{
- register char *sp;
- register int i;
-
- for (i = 0; i < 0177; i++)
- _wht[i] = _etk[i] = _itk[i] = _btk[i] = FALSE;
- for (sp = white; *sp; sp++)
- _wht[*sp] = TRUE;
- for (sp = endtk; *sp; sp++)
- _etk[*sp] = TRUE;
- for (sp = intk; *sp; sp++)
- _itk[*sp] = TRUE;
- for (sp = begtk; *sp; sp++)
- _btk[*sp] = TRUE;
- _wht[0] = _wht['\n'];
- _etk[0] = _etk['\n'];
- _btk[0] = _btk['\n'];
- _itk[0] = _itk['\n'];
-}
-
-/*
- * This routine opens the specified file and calls the function
- * which finds the function and type definitions.
- */
-logical
-find_entries (file)
- char *file;
-{
- char *cp;
- void prolog_funcs ();
-
- inf = fopen (file, "r");
- if (inf == NULL)
- {
- perror (file);
- return FALSE;
- }
- curfile = savestr (file);
- cp = etags_rindex (file, '.');
-
- header_file = (cp && (streq (cp + 1, "h")));
-
- /* .tex, .aux or .bbl implies LaTeX source code */
- if (cp && (streq (cp + 1, "tex") || streq (cp + 1, "aux")
- || streq (cp + 1, "bbl")))
- {
- TEX_funcs (inf);
- goto close_and_return;
- }
- /* .l or .el or .lisp (or .cl or .clisp or ...) implies lisp source code */
- if (cp && (streq (cp + 1, "l")
- || streq (cp + 1, "el")
- || streq (cp + 1, "lsp")
- || streq (cp + 1, "lisp")
- || streq (cp + 1, "cl")
- || streq (cp + 1, "clisp")))
- {
- L_funcs (inf);
- goto close_and_return;
- }
- /* .scm or .sm or .scheme or ... implies scheme source code */
- if (cp && (streq (cp + 1, "sm")
- || streq (cp + 1, "scm")
- || streq (cp + 1, "scheme")
- || streq (cp + 1, "t")
- || streq (cp + 1, "sch")
- || streq (cp + 1, "SM")
- || streq (cp + 1, "SCM")
- /* The `SCM' or `scm' prefix with a version number */
- || (cp[-1] == 'm' && cp[-2] == 'c' && cp[-3] == 's'
- && string_numeric_p (cp + 1))
- || (cp[-1] == 'M' && cp[-2] == 'C' && cp[-3] == 'S'
- && string_numeric_p (cp + 1))))
- {
- Scheme_funcs (inf);
- goto close_and_return;
- }
- /* Assume that ".s" or ".a" is assembly code. -wolfgang.
- Or even ".sa". */
- if (cp && (streq (cp + 1, "s")
- || streq (cp + 1, "a")
- || streq (cp + 1, "sa")))
- {
- Asm_funcs (inf);
- goto close_and_return;
- }
- /* .C or .H or .cxx or .hxx or .cc: a C++ file */
- if (cp && (streq (cp + 1, "C")
- || streq (cp + 1, "H")
- || streq (cp + 1, "cxx")
- || streq (cp + 1, "hxx")
- || streq (cp + 1, "cc")))
- {
- C_entries (C_PLPL); /* C++ */
- goto close_and_return;
- }
- /* .cs or .hs: a C* file */
- if (cp && (streq (cp + 1, "cs")
- || streq (cp + 1, "hs")))
- {
- C_entries (C_STAR);
- goto close_and_return;
- }
- /* .y: a yacc file */
- if (cp && (streq (cp + 1, "y")))
- {
- C_entries (YACC);
- goto close_and_return;
- }
- /* .pl implies prolog source code */
- if (cp && streq (cp + 1, "pl"))
- {
- prolog_funcs (inf);
- goto close_and_return;
- }
- /* .p or .pas: a Pascal file */
- if (cp && (streq (cp + 1, "p")
- || streq (cp + 1, "pas")))
- {
- PAS_funcs (inf);
- goto close_and_return;
- }
- /* If .f or .for, assume it is fortran or nothing. */
- if (cp && (streq (cp + 1, "f")
- || streq (cp + 1, "for")))
- {
- (void) PF_funcs (inf);
- goto close_and_return;
- }
- /* if not a .c or .h or .y file, try fortran */
- if (cp && ((cp[1] != 'c'
- && cp[1] != 'h'
- && cp[1] != 'y')
- || (cp[1] != 0 && cp[2] != 0)))
- {
- if (PF_funcs (inf) != 0)
- goto close_and_return;
- rewind (inf); /* no fortran tags found, try C */
- }
- C_entries (cplusplus ? C_PLPL : 0);
-
-close_and_return:
- (void) fclose (inf);
- return TRUE;
-}
-
-/* Nonzero if string STR is composed of digits. */
-
-int
-string_numeric_p (str)
- char *str;
-{
- while (*str)
- {
- if (*str < '0' || *str > '9')
- return 0;
- }
- return 1;
-}
-\f
-/* Record a tag. */
-/* Should take a TOKEN* instead!! */
-void
-pfnote (name, is_func, named, linestart, linelen, lno, cno)
- char *name; /* tag name */
- logical is_func; /* function or type name? */
- logical named; /* tag different from text of definition? */
- char *linestart;
- int linelen;
- int lno;
- long cno;
-{
- register char *fp;
- register NODE *np;
- char tem[51];
- char c;
-
- np = xnew (1, NODE);
- if (np == NULL)
- {
- if (!emacs_tags_format)
- {
- /* It's okay to output early in etags -- it only disrupts the
- * character count of the tag entries, which is no longer used
- * by tags.el anyway.
- */
- error ("too many entries to sort", 0);
- }
- put_entries (head);
- free_tree (head);
- head = NULL;
- np = xnew (1, NODE);
- }
- /* If ctags mode, change name "main" to M<thisfilename>. */
- if (!emacs_tags_format && !cxref_style && streq (name, "main"))
- {
- fp = etags_rindex (curfile, '/');
- name = concat ("M", fp == 0 ? curfile : fp + 1, "");
- fp = etags_rindex (name, '.');
- if (fp && fp[1] != '\0' && fp[2] == '\0')
- *fp = 0;
- named = TRUE;
- }
- np->name = savestr (name);
- np->file = curfile;
- np->is_func = is_func;
- np->named = named;
- np->lno = lno;
- /* UNCOMMENT THE +1 HERE: */
- np->cno = cno /* + 1 */ ; /* our char numbers are 0-base; emacs's are 1-base */
- np->left = np->right = 0;
- if (emacs_tags_format)
- {
- c = linestart[linelen];
- linestart[linelen] = 0;
- }
- else if (cxref_style == 0)
- {
- sprintf (tem, strlen (linestart) < 50 ? "%s$" : "%.50s", linestart);
- linestart = tem;
- }
- np->pat = savestr (linestart);
- if (emacs_tags_format)
- {
- linestart[linelen] = c;
- }
-
- add_node (np, &head);
-}
-
-/*
- * free_tree ()
- * recurse on left children, iterate on right children.
- */
-void
-free_tree (node)
- register NODE *node;
-{
- while (node)
- {
- register NODE *node_right = node->right;
- free_tree (node->left);
- free (node->name);
- free (node->pat);
- free ((char *) node);
- node = node_right;
- }
-}
-
-/*
- * add_node ()
- * Adds a node to the tree of nodes. In etags mode, we don't keep
- * it sorted; we just keep a linear list. In ctags mode, maintain
- * an ordered tree, with no attempt at balancing.
- *
- * add_node is the only function allowed to add nodes, so it can
- * maintain state.
- */
-/* Must avoid static vars within functions since some systems
- #define static as nothing. */
-static NODE *last_node = NULL;
-
-void
-add_node (node, cur_node_p)
- NODE *node, **cur_node_p;
-{
- register int dif;
- register NODE *cur_node = *cur_node_p;
-
- if (cur_node == NULL)
- {
- *cur_node_p = node;
- last_node = node;
- return;
- }
-
- if (emacs_tags_format)
- {
- /* Etags Mode */
- if (last_node == NULL)
- fatal ("internal error in add_node", 0);
- last_node->right = node;
- last_node = node;
- }
- else
- {
- /* Ctags Mode */
- dif = strcmp (node->name, cur_node->name);
-
- /*
- * If this tag name matches an existing one, then
- * do not add the node, but maybe print a warning.
- */
- if (!dif)
- {
- if (node->file == cur_node->file)
- {
- if (!no_warnings)
- {
- fprintf (stderr, "Duplicate entry in file %s, line %d: %s\n",
- node->file, lineno, node->name);
- fprintf (stderr, "Second entry ignored\n");
- }
- return;
- }
- if (!cur_node->been_warned && !no_warnings)
- {
- fprintf (stderr,
- "Duplicate entry in files %s and %s: %s (Warning only)\n",
- node->file, cur_node->file, node->name);
- }
- cur_node->been_warned = TRUE;
- return;
- }
-
- /* Maybe refuse to add duplicate nodes. */
- if (!permit_duplicates)
- {
- if (streq (node->name, cur_node->name)
- && streq (node->file, cur_node->file))
- return;
- }
-
- /* Actually add the node */
- add_node (node, dif < 0 ? &cur_node->left : &cur_node->right);
- }
-}
-\f
-void
-put_entries (node)
- register NODE *node;
-{
- register char *sp;
-
- if (node == NULL)
- return;
-
- /* Output subentries that precede this one */
- put_entries (node->left);
-
- /* Output this entry */
-
- if (emacs_tags_format)
- {
- if (node->named)
- {
- fprintf (outf, "%s\177%s\001%d,%d\n",
- node->pat, node->name,
- node->lno, node->cno);
- }
- else
- {
- fprintf (outf, "%s\177%d,%d\n",
- node->pat,
- node->lno, node->cno);
- }
- }
- else if (!cxref_style)
- {
- fprintf (outf, "%s\t%s\t",
- node->name, node->file);
-
- if (node->is_func)
- { /* a function */
- putc (searchar, outf);
- putc ('^', outf);
-
- for (sp = node->pat; *sp; sp++)
- {
- if (*sp == '\\' || *sp == searchar)
- putc ('\\', outf);
- putc (*sp, outf);
- }
- putc (searchar, outf);
- }
- else
- { /* a typedef; text pattern inadequate */
- fprintf (outf, "%d", node->lno);
- }
- putc ('\n', outf);
- }
- else if (vgrind_style)
- fprintf (stdout, "%s %s %d\n",
- node->name, node->file, (node->lno + 63) / 64);
- else
- fprintf (stdout, "%-16s %3d %-16s %s\n",
- node->name, node->lno, node->file, node->pat);
-
- /* Output subentries that follow this one */
- put_entries (node->right);
-}
-
-/* Length of a number's decimal representation. */
-int
-number_len (num)
- long num;
-{
- int len = 0;
- if (!num)
- return 1;
- for (; num; num /= 10)
- ++len;
- return len;
-}
-
-/*
- * Return total number of characters that put_entries will output for
- * the nodes in the subtree of the specified node. Works only if emacs_tags_format
- * is set, but called only in that case. This count is irrelevant with
- * the new tags.el, but is still supplied for backward compatibility.
- */
-int
-total_size_of_entries (node)
- register NODE *node;
-{
- register int total;
-
- if (node == NULL)
- return 0;
-
- total = 0;
- for (; node; node = node->right)
- {
- /* Count left subentries. */
- total += total_size_of_entries (node->left);
-
- /* Count this entry */
- total += strlen (node->pat) + 1;
- total += number_len ((long) node->lno) + 1 + number_len (node->cno) + 1;
- if (node->named)
- total += 1 + strlen (node->name); /* \001name */
- }
-
- return total;
-}
-\f
-/*
- * The C symbol tables.
- */
-
-/* Feed stuff between (but not including) %[ and %] lines to:
- gperf -c -k1,3 -o -p -r -t
-%[
-struct C_stab_entry { char *name; int c_ext; enum sym_type type; }
-%%
-class, C_PLPL, st_C_struct
-domain, C_STAR, st_C_struct
-union, 0, st_C_struct
-struct, 0, st_C_struct
-enum, 0, st_C_enum
-typedef, 0, st_C_typedef
-define, 0, st_C_define
-long, 0, st_C_typespec
-short, 0, st_C_typespec
-int, 0, st_C_typespec
-char, 0, st_C_typespec
-float, 0, st_C_typespec
-double, 0, st_C_typespec
-signed, 0, st_C_typespec
-unsigned, 0, st_C_typespec
-auto, 0, st_C_typespec
-void, 0, st_C_typespec
-extern, 0, st_C_typespec
-static, 0, st_C_typespec
-const, 0, st_C_typespec
-volatile, 0, st_C_typespec
-%]
-and replace lines between %< and %> with its output. */
-/*%<*/
-/* C code produced by gperf version 1.8.1 (K&R C version) */
-/* Command-line: gperf -c -k1,3 -o -p -r -t */
-
-
-struct C_stab_entry { char *name; int c_ext; enum sym_type type; };
-
-#define MIN_WORD_LENGTH 3
-#define MAX_WORD_LENGTH 8
-#define MIN_HASH_VALUE 10
-#define MAX_HASH_VALUE 62
-/*
- 21 keywords
- 53 is the maximum key range
-*/
-
-static int
-hash (str, len)
- register char *str;
- register int len;
-{
- static unsigned char hash_table[] =
- {
- 62, 62, 62, 62, 62, 62, 62, 62, 62, 62,
- 62, 62, 62, 62, 62, 62, 62, 62, 62, 62,
- 62, 62, 62, 62, 62, 62, 62, 62, 62, 62,
- 62, 62, 62, 62, 62, 62, 62, 62, 62, 62,
- 62, 62, 62, 62, 62, 62, 62, 62, 62, 62,
- 62, 62, 62, 62, 62, 62, 62, 62, 62, 62,
- 62, 62, 62, 62, 62, 62, 62, 62, 62, 62,
- 62, 62, 62, 62, 62, 62, 62, 62, 62, 62,
- 62, 62, 62, 62, 62, 62, 62, 62, 62, 62,
- 62, 62, 62, 62, 62, 62, 62, 2, 62, 7,
- 6, 9, 15, 30, 62, 24, 62, 62, 1, 24,
- 7, 27, 13, 62, 19, 26, 18, 27, 1, 62,
- 62, 62, 62, 62, 62, 62, 62, 62,
- };
- return len + hash_table[str[2]] + hash_table[str[0]];
-}
-
-struct C_stab_entry *
-in_word_set (str, len)
- register char *str;
- register int len;
-{
-
- static struct C_stab_entry wordlist[] =
- {
- {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",}, {"",},
- {"",},
- {"volatile", 0, st_C_typespec},
- {"",},
- {"long", 0, st_C_typespec},
- {"char", 0, st_C_typespec},
- {"class", C_PLPL, st_C_struct},
- {"",}, {"",}, {"",}, {"",},
- {"const", 0, st_C_typespec},
- {"",}, {"",}, {"",}, {"",},
- {"auto", 0, st_C_typespec},
- {"",}, {"",},
- {"define", 0, st_C_define},
- {"",},
- {"void", 0, st_C_typespec},
- {"",}, {"",}, {"",},
- {"extern", 0, st_C_typespec},
- {"static", 0, st_C_typespec},
- {"",},
- {"domain", C_STAR, st_C_struct},
- {"",},
- {"typedef", 0, st_C_typedef},
- {"double", 0, st_C_typespec},
- {"enum", 0, st_C_enum},
- {"",}, {"",}, {"",}, {"",},
- {"int", 0, st_C_typespec},
- {"",},
- {"float", 0, st_C_typespec},
- {"",}, {"",}, {"",},
- {"struct", 0, st_C_struct},
- {"",}, {"",}, {"",}, {"",},
- {"union", 0, st_C_struct},
- {"",},
- {"short", 0, st_C_typespec},
- {"",}, {"",},
- {"unsigned", 0, st_C_typespec},
- {"signed", 0, st_C_typespec},
- };
-
- if (len <= MAX_WORD_LENGTH && len >= MIN_WORD_LENGTH)
- {
- register int key = hash (str, len);
-
- if (key <= MAX_HASH_VALUE && key >= MIN_HASH_VALUE)
- {
- register char *s = wordlist[key].name;
-
- if (*s == *str && strneq (str + 1, s + 1, len - 1))
- return &wordlist[key];
- }
- }
- return 0;
-}
-/*%>*/
-
-enum sym_type
-C_symtype(str, len, c_ext)
- char *str;
- int len;
- int c_ext;
-{
- register struct C_stab_entry *se = in_word_set(str, len);
-
- if (se == NULL || (se->c_ext && !(c_ext & se->c_ext)))
- return st_none;
- return se->type;
-}
-\f
- /*
- * C functions are recognized using a simple finite automaton.
- * funcdef is its state variable.
- */
-typedef enum
-{
- fnone, /* nothing seen */
- ftagseen, /* function-like tag seen */
- fstartlist, /* just after open parenthesis */
- finlist, /* in parameter list */
- flistseen, /* after parameter list */
- fignore /* before open brace */
-} FUNCST;
-FUNCST funcdef;
-
-
- /* typedefs are recognized using a simple finite automaton.
- * typeddef is its state variable.
- */
-typedef enum
-{
- tnone, /* nothing seen */
- ttypedseen, /* typedef keyword seen */
- tinbody, /* inside typedef body */
- tend /* just before typedef tag */
-} TYPEDST;
-TYPEDST typdef;
-
-
- /* struct tags for C++ are recognized using another simple
- * finite automaton. `structdef' is its state variable.
- * This machinery is only invoked for C++; otherwise structdef
- * should remain snone. However, this machinery can easily be
- * adapted to find structure tags in normal C code.
- */
-typedef enum
-{
- snone, /* nothing seen yet */
- skeyseen, /* struct-like keyword seen */
- stagseen, /* struct-like tag seen */
- scolonseen, /* colon seen after struct-like tag */
- sinbody /* in struct body: recognize member func defs*/
-} STRUCTST;
-STRUCTST structdef;
-/*
- * When structdef is stagseen, scolonseen, or sinbody, structtag is the
- * struct tag, and structtype is the type of the preceding struct-like
- * keyword.
- */
-char structtag[BUFSIZ];
-enum sym_type structtype;
-
-/*
- * Yet another little state machine to deal with preprocessor lines.
- */
-typedef enum
-{
- dnone, /* nothing seen */
- dsharpseen, /* '#' seen as first char on line */
- ddefineseen, /* '#' and 'define' seen */
- dignorerest /* ignore rest of line */
-} DEFINEST;
-DEFINEST definedef;
-
-/*
- * Set this to TRUE, and the next token considered is called a function.
- * Used only for GNUmacs's function-defining macros.
- */
-logical next_token_is_func;
-
-/*
- * TRUE in the rules part of a yacc file, FALSE outside (parse as C).
- */
-logical yacc_rules;
-
-/*
- * C_entries ()
- * This routine finds functions, typedefs, #define's and
- * struct/union/enum definitions in C syntax and adds them
- * to the list.
- */
-
-#define curlb (lbs[curndx].lb)
-#define othlb (lbs[1-curndx].lb)
-#define newlb (lbs[newndx].lb)
-#define curlinepos (lbs[curndx].linepos)
-#define othlinepos (lbs[1-curndx].linepos)
-#define newlinepos (lbs[newndx].linepos)
-
-/* Save and restore token state. This is used when preprocessor defines
- are handled, to avoid disturbing active function/typedef/struct states. */
-#define TOKEN_SAVED_P (savetok.lineno > 0)
-#define SAVE_TOKEN (savetok = tok, savetok.p = (char *) tokoff, \
- savetok.len = toklen, strcpy(savenameb, nameb))
-#define RESTORE_TOKEN (tok = savetok, tokoff = (int) tok.p, \
- toklen = tok.len, strcpy(nameb, savenameb), \
- savetok.lineno = 0)
-
-#define CNL_SAVE_DEFINEDEF \
-do { \
- SET_FILEPOS (curlinepos, inf, charno); \
- lineno++; \
- charno += readline (&curlb, inf); \
- lp = curlb.buffer; \
- quotednl = FALSE; \
- newndx = curndx; \
-} while (FALSE)
-
-#define CNL \
-do { \
- CNL_SAVE_DEFINEDEF; \
- if (TOKEN_SAVED_P) \
- RESTORE_TOKEN; \
- definedef = dnone; \
-} while (FALSE)
-
-#define MAKE_TAG_FROM_NEW_LB(isfun) pfnote (nameb, isfun, tok.named, \
- newlb.buffer, tokoff + toklen + 1, tok.lineno, GET_CHARNO (newlinepos))
-#define MAKE_TAG_FROM_OTH_LB(isfun) pfnote (nameb, isfun, tok.named, \
- othlb.buffer, tokoff + toklen + 1, tok.lineno, GET_CHARNO (othlinepos))
-
-void
-C_entries (c_ext)
- int c_ext; /* extension of C? */
-{
- register char c; /* latest char read; '\0' for end of line */
- register char *lp; /* pointer one beyond the character `c' */
- int curndx, newndx; /* indices for current and new lb */
- TOKEN tok; /* latest token read for funcdef & structdef */
- char nameb[BUFSIZ]; /* latest token name for funcdef & structdef */
- register int tokoff; /* offset in line of start of latest token */
- register int toklen; /* length of latest token */
- int cblev; /* current curly brace level */
- int parlev; /* current parenthesis level */
- logical incomm, inquote, inchar, quotednl, midtoken;
- logical cplpl;
- TOKEN savetok; /* saved token during preprocessor handling */
- char savenameb[BUFSIZ]; /* ouch! */
-
- savetok.lineno = 0;
- curndx = newndx = 0;
- lineno = 0;
- charno = 0;
- lp = curlb.buffer;
- *lp = 0;
-
- definedef = dnone; funcdef = fnone; typdef= tnone; structdef= snone;
- next_token_is_func = yacc_rules = FALSE;
- midtoken = inquote = inchar = incomm = quotednl = FALSE;
- cblev = 0;
- parlev = 0;
- cplpl = c_ext & C_PLPL;
-
- while (!feof (inf))
- {
- c = *lp++;
- if (c == '\\')
- {
- /* If we're at the end of the line, the next character is a
- '\0'; don't skip it, because it's the thing that tells us
- to read the next line. */
- if (*lp == '\0')
- {
- quotednl = TRUE;
- continue;
- }
- lp++;
- c = ' ';
- }
- else if (incomm)
- {
- switch (c)
- {
- case '*':
- if (*lp == '/')
- {
- c = *lp++;
- incomm = FALSE;
- }
- break;
- case '\0':
- /* Newlines inside comments do not end macro definitions in
- traditional cpp. */
- CNL_SAVE_DEFINEDEF;
- break;
- }
- continue;
- }
- else if (inquote)
- {
- switch (c)
- {
- case '"':
- inquote = FALSE;
- break;
- case '\0':
- /* Newlines inside strings do not end macro definitions
- in traditional cpp, even though compilers don't
- usually accept them. */
- CNL_SAVE_DEFINEDEF;
- break;
- }
- continue;
- }
- else if (inchar)
- {
- switch (c)
- {
- case '\0':
- /* Hmmm, something went wrong. */
- CNL;
- /* FALLTHRU */
- case '\'':
- inchar = FALSE;
- break;
- }
- continue;
- }
- else
- switch (c)
- {
- case '"':
- inquote = TRUE;
- if (funcdef != finlist && funcdef != fignore)
- funcdef = fnone;
- continue;
- case '\'':
- inchar = TRUE;
- if (funcdef != finlist && funcdef != fignore)
- funcdef = fnone;
- continue;
- case '/':
- if (*lp == '*')
- {
- lp++;
- incomm = TRUE;
- continue;
- }
- else if (cplpl && *lp == '/')
- {
- c = 0;
- break;
- }
- else
- break;
- case '%':
- if ((c_ext & YACC) && *lp == '%')
- {
- /* entering or exiting rules section in yacc file */
- lp++;
- definedef = dnone; funcdef = fnone;
- typdef= tnone; structdef= snone;
- next_token_is_func = FALSE;
- midtoken = inquote = inchar = incomm = quotednl = FALSE;
- cblev = 0;
- yacc_rules = !yacc_rules;
- continue;
- }
- else
- break;
- case '#':
- if (lp == newlb.buffer + 1 && definedef == dnone)
- definedef = dsharpseen;
- continue;
- } /* switch (c) */
-
-
- /* Consider token only if some complicated conditions are satisfied. */
- if (((cblev == 0 && structdef != scolonseen)
- || (cblev == 1 && cplpl && structdef == sinbody))
- && definedef != dignorerest
- && (funcdef != finlist
- || (definedef != dnone && definedef != dignorerest)))
- {
- if (midtoken)
- {
- if (endtoken (c))
- {
- if (cplpl && c == ':' && *lp == ':' && begtoken(*(lp + 1)))
- {
- /*
- * This handles :: in the middle, but not at beginning
- * of an identifier.
- */
- lp += 2;
- toklen += 3;
- }
- else
- {
- logical is_func = FALSE;
-
- tok.lineno = lineno;
- tok.p = newlb.buffer + tokoff;
- tok.len = toklen;
- tok.named = FALSE;
- if (yacc_rules
- || consider_token (c, &tok, c_ext, cblev, &is_func))
- {
- if (structdef == sinbody
- && definedef == dnone
- && is_func)
- /* function defined in C++ class body */
- {
- tok.named = TRUE;
- sprintf (nameb, "%s::%.*s",
- ((structtag[0] == '\0')
- ? "_anonymous_" : structtag),
- tok.len, tok.p);
- }
- else
- {
- sprintf (nameb, "%.*s", tok.len, tok.p);
- }
-
- if (structdef == stagseen
- || typdef == tend)
- tok.named = TRUE;
-
- if (definedef == dnone
- && (funcdef == ftagseen
- || structdef == stagseen
- || typdef == tend))
- {
- if (newndx == curndx)
- curndx = 1 - curndx; /* switch line buffers */
- }
- else
- MAKE_TAG_FROM_NEW_LB (is_func);
- }
- midtoken = FALSE;
- }
- } /* if (endtoken (c)) */
- else if (intoken (c))
- {
- toklen++;
- continue;
- }
- } /* if (midtoken) */
- else if (begtoken (c))
- {
- switch (definedef)
- {
- case dnone:
- switch (funcdef)
- {
- case fstartlist:
- funcdef = finlist;
- continue;
- case flistseen:
- MAKE_TAG_FROM_OTH_LB (TRUE);
- funcdef = fignore;
- break;
- case ftagseen:
- funcdef = fnone;
- break;
- }
- if (structdef == stagseen)
- structdef = snone;
- break;
- case dsharpseen:
- /* Take a quick peek ahead for define directive,
- so we can avoid saving the token when not absolutely
- necessary. [This is a speed hack.] */
- if (c == 'd' && strneq(lp, "efine", 5)
- && iswhite(*(lp + 5)))
- {
- SAVE_TOKEN;
- definedef = ddefineseen;
- lp += 6;
- }
- else
- definedef = dignorerest;
- continue;
- }
- if (!yacc_rules || lp == newlb.buffer + 1)
- {
- tokoff = lp - 1 - newlb.buffer;
- toklen = 1;
- midtoken = TRUE;
- }
- continue;
- }
- } /* if must look at token */
-
-
- /* Detect end of line, colon, comma, semicolon and various braces
- after having handled a token.*/
- switch (c)
- {
- case ':':
- if (definedef != dnone)
- break;
- if (structdef == stagseen)
- structdef = scolonseen;
- else
- switch (funcdef)
- {
- case ftagseen:
- if (yacc_rules)
- {
- MAKE_TAG_FROM_OTH_LB (FALSE);
- funcdef = fignore;
- }
- break;
- case fstartlist:
- funcdef = fnone;
- break;
- }
- break;
- case ';':
- if (definedef != dnone)
- break;
- if (cblev == 0 && typdef == tend)
- {
- typdef = tnone;
- MAKE_TAG_FROM_OTH_LB (FALSE);
- }
- if (funcdef != fignore)
- funcdef = fnone;
- /* FALLTHRU */
- case ',':
- /* FALLTHRU */
- case '[':
- if (definedef != dnone)
- break;
- if (funcdef != finlist && funcdef != fignore)
- funcdef = fnone;
- if (structdef == stagseen)
- structdef = snone;
- break;
- case '(':
- if (definedef != dnone)
- break;
- switch (funcdef)
- {
- case ftagseen:
- funcdef = fstartlist;
- break;
- case flistseen:
- funcdef = finlist;
- break;
- }
- parlev++;
- break;
- case ')':
- if (definedef != dnone)
- break;
- if (--parlev == 0)
- {
- switch (funcdef)
- {
- case fstartlist:
- case finlist:
- funcdef = flistseen;
- break;
- }
- }
- else if (parlev < 0) /* can happen due to ill-conceived #if's. */
- parlev = 0;
- break;
- case '{':
- if (definedef != dnone)
- break;
- if (typdef == ttypedseen)
- typdef = tinbody;
- switch (structdef)
- {
- case skeyseen: /* unnamed struct */
- structtag[0] = '\0';
- structdef = sinbody;
- break;
- case stagseen:
- case scolonseen: /* named struct */
- structdef = sinbody;
- MAKE_TAG_FROM_OTH_LB (FALSE);
- break;
- }
- switch (funcdef)
- {
- case flistseen:
- MAKE_TAG_FROM_OTH_LB (TRUE);
- /* FALLTHRU */
- case fignore:
- funcdef = fnone;
- }
- cblev++;
- break;
- case '*':
- if (definedef != dnone)
- break;
- if (funcdef == fstartlist)
- funcdef = fnone; /* avoid tagging `foo' in `foo (*bar()) ()' */
- break;
- case '}':
- if (definedef != dnone)
- break;
- if (!noindentypedefs && lp == newlb.buffer + 1)
- {
- cblev = 0; /* reset curly brace level if first column */
- parlev = 0; /* also reset paren level, just in case... */
- }
- else if (cblev > 0)
- cblev--;
- if (cblev == 0)
- {
- if (typdef == tinbody)
- typdef = tend;
- structdef = snone;
- strcpy (structtag, "<error 2>");
- }
- break;
- case '=':
- case '#': case '+': case '-': case '~': case '&': case '%': case '/':
- case '|': case '^': case '!': case '<': case '>': case '.': case '?':
- if (definedef != dnone)
- break;
- /* These surely cannot follow a function tag. */
- if (funcdef != finlist && funcdef != fignore)
- funcdef = fnone;
- break;
- case '\0':
- /* If a macro spans multiple lines don't reset its state. */
- if (quotednl)
- CNL_SAVE_DEFINEDEF;
- else
- CNL;
- break;
- } /* switch (c) */
-
- } /* while not eof */
-}
-
-/*
- * consider_token ()
- * checks to see if the current token is at the start of a
- * function, or corresponds to a typedef, or is a struct/union/enum
- * tag.
- *
- * *IS_FUNC gets TRUE iff the token is a function or macro with args.
- * C_EXT is which language we are looking at.
- *
- * In the future we will need some way to adjust where the end of
- * the token is; for instance, implementing the C++ keyword
- * `operator' properly will adjust the end of the token to be after
- * whatever follows `operator'.
- *
- * Globals
- * funcdef IN OUT
- * structdef IN OUT
- * definedef IN OUT
- * typdef IN OUT
- * next_token_is_func IN OUT
- */
-
-logical
-consider_token (c, tokp, c_ext, cblev, is_func)
- register char c; /* IN: first char after the token */
- register TOKEN *tokp; /* IN: token pointer */
- int c_ext; /* IN: C extensions mask */
- int cblev; /* IN: curly brace level */
- logical *is_func; /* OUT */
-{
- enum sym_type toktype = C_symtype(tokp->p, tokp->len, c_ext);
-
- /*
- * Advance the definedef state machine.
- */
- switch (definedef)
- {
- case dnone:
- /* We're not on a preprocessor line. */
- break;
- case dsharpseen:
- if (toktype == st_C_define)
- {
- definedef = ddefineseen;
- }
- else
- {
- definedef = dignorerest;
- }
- return (FALSE);
- case ddefineseen:
- /*
- * Make a tag for any macro.
- */
- definedef = dignorerest;
- *is_func = (c == '(');
- if (!*is_func && !constantypedefs)
- return (FALSE);
- else
- return (TRUE);
- case dignorerest:
- return (FALSE);
- default:
- error ("internal error: definedef value.", 0);
- }
-
- /*
- * Now typedefs
- */
- switch (typdef)
- {
- case tnone:
- if (toktype == st_C_typedef)
- {
- if (typedefs)
- typdef = ttypedseen;
- return (FALSE);
- }
- break;
- case ttypedseen:
- switch (toktype)
- {
- case st_none:
- case st_C_typespec:
- typdef = tend;
- break;
- case st_C_struct:
- case st_C_enum:
- break;
- }
- /* Do not return here, so the structdef stuff has a chance. */
- break;
- case tend:
- switch (toktype)
- {
- case st_C_typespec:
- case st_C_struct:
- case st_C_enum:
- return (FALSE);
- }
- return (TRUE);
- }
-
- /*
- * This structdef business is currently only invoked when cblev==0.
- * It should be recursively invoked whatever the curly brace level,
- * and a stack of states kept, to allow for definitions of structs
- * within structs.
- *
- * This structdef business is NOT invoked when we are ctags and the
- * file is plain C. This is because a struct tag may have the same
- * name as another tag, and this loses with ctags.
- *
- * This if statement deals with the typdef state machine as
- * follows: if typdef==ttypedseen and token is struct/union/class/enum,
- * return (FALSE). All the other code here is for the structdef
- * state machine.
- */
- switch (toktype)
- {
- case st_C_struct:
- case st_C_enum:
- if (typdef == ttypedseen
- || (typedefs_and_cplusplus && cblev == 0 && structdef == snone))
- {
- structdef = skeyseen;
- structtype = toktype;
- }
- return (FALSE);
- }
- if (structdef == skeyseen)
- {
- if (structtype == st_C_struct)
- {
- strncpy (structtag, tokp->p, tokp->len);
- structtag[tokp->len] = '\0'; /* for struct/union/class */
- }
- else
- {
- structtag[0] = '\0'; /* for enum (why is it treated differently?) */
- }
- structdef = stagseen;
- return (TRUE);
- }
-
- /* Avoid entering funcdef stuff if typdef is going on. */
- if (typdef != tnone)
- {
- definedef = dnone;
- return (FALSE);
- }
-
- /* Detect GNUmacs's function-defining macros. */
- if (definedef == dnone)
- {
- if (strneq (tokp->p, "DEF", 3)
- || strneq (tokp->p, "ENTRY", 5)
- || strneq (tokp->p, "SYSCALL", 7)
- || strneq (tokp->p, "PSEUDO", 6))
- {
- next_token_is_func = TRUE;
- return (FALSE);
- }
- if (strneq (tokp->p, "EXFUN", 5))
- {
- next_token_is_func = FALSE;
- return (FALSE);
- }
- }
- if (next_token_is_func)
- {
- next_token_is_func = FALSE;
- funcdef = fnone;
- *is_func = TRUE; /* to force search string in ctags */
- return (TRUE);
- }
-
- /* A function? */
- switch (toktype)
- {
- case st_C_typespec:
- funcdef = fnone; /* should be useless */
- return (FALSE);
- default:
- if (funcdef == fnone)
- {
- funcdef = ftagseen;
- *is_func = TRUE;
- return (TRUE);
- }
- }
-
- return (FALSE);
-}
-\f
-/* Fortran parsing */
-
-char *dbp;
-int pfcnt;
-
-int
-PF_funcs (fi)
- FILE *fi;
-{
- lineno = 0;
- charno = 0;
- pfcnt = 0;
-
- while (!feof (fi))
- {
- lineno++;
- linecharno = charno;
- charno += readline (&lb, fi);
- dbp = lb.buffer;
- if (*dbp == '%')
- dbp++; /* Ratfor escape to fortran */
- while (isspace (*dbp))
- dbp++;
- if (*dbp == 0)
- continue;
- switch (*dbp | ' ')
- {
- case 'i':
- if (tail ("integer"))
- takeprec ();
- break;
- case 'r':
- if (tail ("real"))
- takeprec ();
- break;
- case 'l':
- if (tail ("logical"))
- takeprec ();
- break;
- case 'c':
- if (tail ("complex") || tail ("character"))
- takeprec ();
- break;
- case 'd':
- if (tail ("double"))
- {
- while (isspace (*dbp))
- dbp++;
- if (*dbp == 0)
- continue;
- if (tail ("precision"))
- break;
- continue;
- }
- break;
- }
- while (isspace (*dbp))
- dbp++;
- if (*dbp == 0)
- continue;
- switch (*dbp | ' ')
- {
- case 'f':
- if (tail ("function"))
- getit (fi);
- continue;
- case 's':
- if (tail ("subroutine"))
- getit (fi);
- continue;
- case 'e':
- if (tail ("entry"))
- getit (fi);
- continue;
- case 'p':
- if (tail ("program"))
- {
- getit (fi);
- continue;
- }
- if (tail ("procedure"))
- getit (fi);
- continue;
- }
- }
- return (pfcnt);
-}
-
-logical
-tail (cp)
- char *cp;
-{
- register int len = 0;
-
- while (*cp && (*cp | ' ') == (dbp[len] | ' '))
- cp++, len++;
- if (*cp == 0)
- {
- dbp += len;
- return (TRUE);
- }
- return (FALSE);
-}
-
-void
-takeprec ()
-{
- while (isspace (*dbp))
- dbp++;
- if (*dbp != '*')
- return;
- dbp++;
- while (isspace (*dbp))
- dbp++;
- if (!isdigit (*dbp))
- {
- --dbp; /* force failure */
- return;
- }
- do
- dbp++;
- while (isdigit (*dbp));
-}
-
-void
-getit (fi)
- FILE *fi;
-{
- register char *cp;
- char c;
- char nambuf[BUFSIZ];
-
- while (isspace (*dbp))
- dbp++;
- if (*dbp == '\0')
- {
- lineno++;
- linecharno = charno;
- charno += readline (&lb, fi);
- dbp = lb.buffer;
- if (dbp[5] != '&')
- return;
- dbp += 6;
- while (isspace (*dbp))
- dbp++;
- }
- if (!isalpha (*dbp)
- && *dbp != '_'
- && *dbp != '$')
- return;
- for (cp = dbp + 1;
- (*cp
- && (isalpha (*cp) || isdigit (*cp) || (*cp == '_') || (*cp == '$')));
- cp++)
- continue;
- c = *cp;
- *cp = '\0';
- strcpy (nambuf, dbp);
- *cp = c;
- pfnote (nambuf, TRUE, FALSE, lb.buffer,
- cp - lb.buffer + 1, lineno, linecharno);
- pfcnt++;
-}
-
-/* Handle a file of assembler code. */
-
-void
-Asm_funcs (fi)
- FILE *fi;
-{
- int i;
- register char c;
-
- lineno = 0;
- charno = 0;
- pfcnt = 0;
-
- while (!feof (fi))
- {
- lineno++;
- linecharno = charno;
- charno += readline (&lb, fi);
- dbp = lb.buffer;
-
- for (i = 0; ((c = dbp[i]) && !isspace (c)) && (c != ':'); i++)
- ;
-
- if ((i > 0) && (c == ':'))
- getit (fi);
- }
-}
-\f
-/* Added by Mosur Mohan, 4/22/88 */
-/* Pascal parsing */
-
-#define GET_NEW_LINE \
-{ \
- linecharno = charno; lineno++; \
- charno += 1 + readline (&lb, inf); \
- dbp = lb.buffer; \
-}
-
-/* Locates tags for procedures & functions.
- * Doesn't do any type- or var-definitions.
- * It does look for the keyword "extern" or "forward"
- * immediately following the procedure statement;
- * if found, the tag is skipped.
- */
-
-void
-PAS_funcs (fi)
- FILE *fi;
-{
- struct linebuffer tline; /* mostly copied from C_entries */
- long save_lcno;
- int save_lineno;
- char c, *cp;
- char nambuf[BUFSIZ];
-
- logical /* each of these flags is TRUE iff: */
- incomm1, /* point is inside {..} comment */
- incomm2, /* point is inside (*..*) comment */
- inquote, /* point is inside '..' string */
- get_tagname, /* point is after PROCEDURE/FUNCTION */
- /* keyword, so next item = potential tag */
- found_tag, /* point is after a potential tag */
- inparms, /* point is within parameter-list */
- verify_tag; /* point has passed the parm-list, so the */
- /* next token will determine whether */
- /* this is a FORWARD/EXTERN to be */
- /* ignored, or whether it is a real tag */
-
- lineno = 0;
- charno = 0;
- dbp = lb.buffer;
- *dbp = 0;
- initbuffer (&tline);
-
- incomm1 = incomm2 = inquote = FALSE;
- found_tag = FALSE; /* have a proc name; check if extern */
- get_tagname = FALSE; /* have found "procedure" keyword */
- inparms = FALSE; /* found '(' after "proc" */
- verify_tag = FALSE; /* check if "extern" is ahead */
-
- /* long main loop to get next char */
- while (!feof (fi))
- {
- c = *dbp++;
- if (c == 0) /* if end of line */
- {
- GET_NEW_LINE;
- if (*dbp == 0)
- continue;
- if (!((found_tag && verify_tag) ||
- get_tagname))
- c = *dbp++; /* only if don't need *dbp pointing */
- /* to the beginning of the name of */
- /* the procedure or function */
- }
- if (incomm1) /* within { - } comments */
- {
- if (c == '}')
- incomm1 = FALSE;
- continue;
- }
- else if (incomm2) /* within (* - *) comments */
- {
- if (c == '*')
- {
- while ((c = *dbp++) == '*')
- continue;
- if (c == 0)
- GET_NEW_LINE;
- if (c == ')')
- incomm2 = FALSE;
- }
- continue;
- }
- else if (inquote)
- {
- if (c == '\'')
- inquote = FALSE;
- continue;
- }
- else
- switch (c)
- {
- case '\'':
- inquote = TRUE; /* found first quote */
- continue;
- case '{': /* found open-{-comment */
- incomm1 = TRUE;
- continue;
- case '(':
- if (*dbp == '*') /* found open-(*-comment */
- {
- incomm2 = TRUE;
- dbp++;
- }
- else if (found_tag) /* found '(' after tag, i.e., parm-list */
- inparms = TRUE;
- continue;
- case ')': /* end of parms list */
- if (inparms)
- inparms = FALSE;
- continue;
- case ';':
- if ((found_tag) && (!inparms)) /* end of proc or fn stmt */
- {
- verify_tag = TRUE;
- break;
- }
- continue;
- }
- if ((found_tag) && (verify_tag) && (*dbp != ' '))
- {
- /* check if this is an "extern" declaration */
- if (*dbp == 0)
- continue;
- if ((*dbp == 'e') || (*dbp == 'E'))
- {
- if (tail ("extern")) /* superfluous, really! */
- {
- found_tag = FALSE;
- verify_tag = FALSE;
- }
- }
- else if ((*dbp == 'f') || (*dbp == 'F'))
- {
- if (tail ("forward")) /* check for forward reference */
- {
- found_tag = FALSE;
- verify_tag = FALSE;
- }
- }
- if ((found_tag) && (verify_tag)) /* not external proc, so make tag */
- {
- found_tag = FALSE;
- verify_tag = FALSE;
- pfnote (nambuf, TRUE, FALSE,
- tline.buffer, cp - tline.buffer + 1,
- save_lineno, save_lcno);
- continue;
- }
- }
- if (get_tagname) /* grab name of proc or fn */
- {
- if (*dbp == 0)
- continue;
-
- /* save all values for later tagging */
- tline.size = lb.size;
- strcpy (tline.buffer, lb.buffer);
- save_lineno = lineno;
- save_lcno = linecharno;
-
- /* grab block name */
- for (cp = dbp + 1; *cp && (!endtoken (*cp)); cp++)
- continue;
- c = cp[0];
- cp[0] = 0;
- strcpy (nambuf, dbp);
- cp[0] = c;
- dbp = cp; /* restore dbp to e-o-token */
- get_tagname = FALSE;
- found_tag = TRUE;
- continue;
-
- /* and proceed to check for "extern" */
- }
- if ((!incomm1) && (!incomm2) && (!inquote) &&
- (!found_tag) && (!get_tagname))
- {
- /* check for proc/fn keywords */
- switch (c | ' ')
- {
- case 'p':
- if (tail ("rocedure")) /* c = 'p', dbp has advanced */
- get_tagname = TRUE;
- continue;
- case 'f':
- if (tail ("unction"))
- get_tagname = TRUE;
- continue;
- }
- }
- } /* while not e-o-f */
-}
-\f
-/*
- * lisp tag functions
- * just look for (def or (DEF
- */
-
-void
-L_funcs (fi)
- FILE *fi;
-{
- lineno = 0;
- charno = 0;
- pfcnt = 0;
-
- while (!feof (fi))
- {
- lineno++;
- linecharno = charno;
- charno += readline (&lb, fi);
- dbp = lb.buffer;
- if (dbp[0] == '(')
- {
- if (L_isdef (dbp))
- {
- while (!isspace (*dbp))
- dbp++;
- while (isspace (*dbp))
- dbp++;
- L_getit ();
- }
- else
- {
- /* Check for (foo::defmumble name-defined ... */
- do
- dbp++;
- while (*dbp && !isspace (*dbp)
- && *dbp != ':' && *dbp != '(' && *dbp != ')');
- if (*dbp == ':')
- {
- do
- dbp++;
- while (*dbp == ':');
-
- if (L_isdef (dbp - 1))
- {
- while (!isspace (*dbp))
- dbp++;
- while (isspace (*dbp))
- dbp++;
- L_getit ();
- }
- }
- }
- }
- }
-}
-
-int
-L_isdef (dbp)
- register char *dbp;
-{
- return ((dbp[1] == 'd' || dbp[1] == 'D')
- && (dbp[2] == 'e' || dbp[2] == 'E')
- && (dbp[3] == 'f' || dbp[3] == 'F'));
-}
-
-int
-L_isquote (dbp)
- register char *dbp;
-{
- return ((*(++dbp) == 'q' || *dbp == 'Q')
- && (*(++dbp) == 'u' || *dbp == 'U')
- && (*(++dbp) == 'o' || *dbp == 'O')
- && (*(++dbp) == 't' || *dbp == 'T')
- && (*(++dbp) == 'e' || *dbp == 'E')
- && isspace(*(++dbp)));
-}
-
-void
-L_getit ()
-{
- register char *cp;
- char c;
- char nambuf[BUFSIZ];
-
- if (*dbp == '\'') /* Skip prefix quote */
- dbp++;
- else if (*dbp == '(' && L_isquote (dbp)) /* Skip "(quote " */
- {
- dbp += 7;
- while (isspace(*dbp))
- dbp++;
- }
- for (cp = dbp /*+1*/; *cp && *cp != '(' && *cp != ' ' && *cp != ')'; cp++)
- continue;
- if (cp == dbp)
- return;
-
- c = cp[0];
- cp[0] = 0;
- strcpy (nambuf, dbp);
- cp[0] = c;
- pfnote (nambuf, TRUE, FALSE, lb.buffer,
- cp - lb.buffer + 1, lineno, linecharno);
- pfcnt++;
-}
-\f
-/*
- * Scheme tag functions
- * look for (def... xyzzy
- * look for (def... (xyzzy
- * look for (def ... ((...(xyzzy ....
- * look for (set! xyzzy
- */
-
-static void get_scheme ();
-
-void
-Scheme_funcs (fi)
- FILE *fi;
-{
- lineno = 0;
- charno = 0;
- pfcnt = 0;
-
- while (!feof (fi))
- {
- lineno++;
- linecharno = charno;
- charno += readline (&lb, fi);
- dbp = lb.buffer;
- if (dbp[0] == '(' &&
- (dbp[1] == 'D' || dbp[1] == 'd') &&
- (dbp[2] == 'E' || dbp[2] == 'e') &&
- (dbp[3] == 'F' || dbp[3] == 'f'))
- {
- while (!isspace (*dbp))
- dbp++;
- /* Skip over open parens and white space */
- while (*dbp && (isspace (*dbp) || *dbp == '('))
- dbp++;
- get_scheme ();
- }
- if (dbp[0] == '(' &&
- (dbp[1] == 'S' || dbp[1] == 's') &&
- (dbp[2] == 'E' || dbp[2] == 'e') &&
- (dbp[3] == 'T' || dbp[3] == 't') &&
- (dbp[4] == '!' || dbp[4] == '!') &&
- (isspace (dbp[5])))
- {
- while (!isspace (*dbp))
- dbp++;
- /* Skip over white space */
- while (isspace (*dbp))
- dbp++;
- get_scheme ();
- }
- }
-}
-
-static void
-get_scheme ()
-{
- register char *cp;
- char c;
- char nambuf[BUFSIZ];
-
- if (*dbp == 0)
- return;
- /* Go till you get to white space or a syntactic break */
- for (cp = dbp + 1; *cp && *cp != '(' && *cp != ')' && !isspace (*cp); cp++)
- continue;
- /* Null terminate the string there. */
- c = cp[0];
- cp[0] = 0;
- /* Copy the string */
- strcpy (nambuf, dbp);
- /* Unterminate the string */
- cp[0] = c;
- /* Announce the change */
- pfnote (nambuf, TRUE, FALSE, lb.buffer, cp - lb.buffer + 1, lineno, linecharno);
- pfcnt++;
-}
-\f
-/* Find tags in TeX and LaTeX input files. */
-
-/* TEX_toktab is a table of TeX control sequences that define tags.
- Each TEX_tabent records one such control sequence.
- CONVERT THIS TO USE THE Stab TYPE!! */
-
-struct TEX_tabent
-{
- char *name;
- int len;
-};
-
-struct TEX_tabent *TEX_toktab = NULL; /* Table with tag tokens */
-
-/* Default set of control sequences to put into TEX_toktab.
- The value of environment var TEXTAGS is prepended to this. */
-
-static char *TEX_defenv =
-":chapter:section:subsection:subsubsection:eqno:label:ref:cite:bibitem:typeout";
-
-void TEX_mode ();
-struct TEX_tabent *TEX_decode_env ();
-void TEX_getit ();
-int TEX_Token ();
-
-static char TEX_esc = '\\';
-static char TEX_opgrp = '{';
-static char TEX_clgrp = '}';
-
-/*
- * TeX/LaTeX scanning loop.
- */
-
-void
-TEX_funcs (fi)
- FILE *fi;
-{
- char *lasthit;
-
- lineno = 0;
- charno = 0;
- pfcnt = 0;
-
- /* Select either \ or ! as escape character. */
- TEX_mode (fi);
-
- /* Initialize token table once from environment. */
- if (!TEX_toktab)
- TEX_toktab = TEX_decode_env ("TEXTAGS", TEX_defenv);
-
- while (!feof (fi))
- { /* Scan each line in file */
- lineno++;
- linecharno = charno;
- charno += readline (&lb, fi);
- dbp = lb.buffer;
- lasthit = dbp;
- while (dbp = etags_index (dbp, TEX_esc)) /* Look at each escape in line */
- {
- register int i;
-
- if (!*(++dbp))
- break;
- linecharno += dbp - lasthit;
- lasthit = dbp;
- i = TEX_Token (lasthit);
- if (0 <= i)
- {
- TEX_getit (lasthit, TEX_toktab[i].len);
- break; /* We only save a line once */
- }
- }
- }
-}
-
-#define TEX_LESC '\\'
-#define TEX_SESC '!'
-#define TEX_cmt '%'
-
-/* Figure out whether TeX's escapechar is '\\' or '!' and set grouping */
-/* chars accordingly. */
-
-void
-TEX_mode (f)
- FILE *f;
-{
- int c;
-
- while ((c = getc (f)) != EOF)
- {
- /* Skip to next line if we hit the TeX comment char. */
- if (c == TEX_cmt)
- while (c != '\n')
- c = getc (f);
- else if (c == TEX_LESC || c == TEX_SESC )
- break;
- }
-
- if (c == TEX_LESC)
- {
- TEX_esc = TEX_LESC;
- TEX_opgrp = '{';
- TEX_clgrp = '}';
- }
- else
- {
- TEX_esc = TEX_SESC;
- TEX_opgrp = '<';
- TEX_clgrp = '>';
- }
- rewind (f);
-}
-
-/* Read environment and prepend it to the default string. */
-/* Build token table. */
-
-struct TEX_tabent *
-TEX_decode_env (evarname, defenv)
- char *evarname;
- char *defenv;
-{
- register char *env, *p;
-
- struct TEX_tabent *tab;
- int size, i;
-
- /* Append default string to environment. */
- env = getenv (evarname);
- if (!env)
- env = defenv;
- else
- env = concat (env, defenv, "");
-
- /* Allocate a token table */
- for (size = 1, p = env; p;)
- if ((p = etags_index (p, ':')) && *(++p))
- size++;
- /* Add 1 to leave room for null terminator. */
- tab = xnew (size + 1, struct TEX_tabent);
-
- /* Unpack environment string into token table. Be careful about */
- /* zero-length strings (leading ':', "::" and trailing ':') */
- for (i = 0; *env;)
- {
- p = etags_index (env, ':');
- if (!p) /* End of environment string. */
- p = env + strlen (env);
- if (p - env > 0)
- { /* Only non-zero strings. */
- tab[i].name = savenstr (env, p - env);
- tab[i].len = strlen (tab[i].name);
- i++;
- }
- if (*p)
- env = p + 1;
- else
- {
- tab[i].name = NULL; /* Mark end of table. */
- tab[i].len = 0;
- break;
- }
- }
- return tab;
-}
-
-/* Record a tag defined by a TeX command of length LEN and starting at NAME.
- The name being defined actually starts at (NAME + LEN + 1).
- But we seem to include the TeX command in the tag name. */
-
-void
-TEX_getit (name, len)
- char *name;
- int len;
-{
- char *p = name + len;
- char nambuf[BUFSIZ];
-
- if (*name == 0)
- return;
-
- /* Let tag name extend to next group close (or end of line) */
- while (*p && *p != TEX_clgrp)
- p++;
- strncpy (nambuf, name, p - name);
- nambuf[p - name] = 0;
-
- pfnote (nambuf, TRUE, FALSE, lb.buffer, strlen (lb.buffer), lineno, linecharno);
- pfcnt++;
-}
-
-/* If the text at CP matches one of the tag-defining TeX command names,
- return the etags_index of that command in TEX_toktab.
- Otherwise return -1. */
-
-/* Keep the capital `T' in `Token' for dumb truncating compilers
- (this distinguishes it from `TEX_toktab' */
-int
-TEX_Token (cp)
- char *cp;
-{
- int i;
-
- for (i = 0; TEX_toktab[i].len > 0; i++)
- if (strneq (TEX_toktab[i].name, cp, TEX_toktab[i].len))
- return i;
- return -1;
-}
-\f
-/* Support for Prolog. */
-
-/* whole head (not only functor, but also arguments)
- is gotten in compound term. */
-
-void
-prolog_getit (s, lineno, linecharno)
- char *s;
- int lineno;
- long linecharno;
-{
- char nambuf[BUFSIZ], *save_s, tmpc;
- int insquote, npar;
-
- save_s = s;
- insquote = FALSE;
- npar = 0;
- while (1)
- {
- if (*s == '\0') /* syntax error. */
- return;
- else if (insquote && *s == '\'' && *(s + 1) == '\'')
- s += 2;
- else if (*s == '\'')
- {
- insquote = !insquote;
- s++;
- }
- else if (!insquote && *s == '(')
- {
- npar++;
- s++;
- }
- else if (!insquote && *s == ')')
- {
- npar--;
- s++;
- if (npar == 0)
- break;
- else if (npar < 0) /* syntax error. */
- return;
- }
- else if (!insquote && *s == '.' && (isspace (*(s + 1)) || *(s + 1) == '\0'))
- { /* fullstop. */
- if (npar != 0) /* syntax error. */
- return;
- s++;
- break;
- }
- else
- s++;
- }
- tmpc = *s;
- *s = '\0';
- strcpy (nambuf, save_s);
- *s = tmpc;
- pfnote (nambuf, TRUE, FALSE, save_s, strlen (nambuf), lineno, linecharno);
-}
-
-/* It is assumed that prolog predicate starts from column 0. */
-
-void
-prolog_funcs (fi)
- FILE *fi;
-{
- void skip_comment (), prolog_getit ();
-
- lineno = linecharno = charno = 0;
- while (!feof (fi))
- {
- lineno++;
- linecharno += charno;
- charno = readline (&lb, fi) + 1; /* 1 for newline. */
- dbp = lb.buffer;
- if (isspace (dbp[0])) /* not predicate header. */
- continue;
- else if (dbp[0] == '%') /* comment. */
- continue;
- else if (dbp[0] == '/' && dbp[1] == '*') /* comment. */
- skip_comment (&lb, fi, &lineno, &linecharno);
- else /* found. */
- prolog_getit (dbp, lineno, linecharno);
- }
-}
-
-void
-skip_comment (plb, fi, plineno, plinecharno)
- struct linebuffer *plb;
- FILE *fi;
- int *plineno; /* result */
- long *plinecharno; /* result */
-{
- while (!substr ("*/", plb->buffer))
- {
- (*plineno)++;
- *plinecharno += readline (plb, fi) + 1;
- } /* 1 for newline. */
-}
-
-/* Return TRUE if 'sub' exists somewhere in 's'. */
-
-int
-substr (sub, s)
- char *sub;
- char *s;
-{
- while (*s && (s = etags_index (s, *sub)))
- if (prestr (sub, s))
- return (TRUE);
- else
- s++;
- return (FALSE);
-}
-
-/* Return TRUE if 'pre' is prefix of string 's'. */
-
-int
-prestr (pre, s)
- char *pre;
- char *s;
-{
- if (*pre == '\0')
- return (TRUE);
- else if (*pre == *s)
- return (prestr (pre + 1, s + 1));
- else
- return (FALSE);
-}
-\f
-/* Initialize a linebuffer for use */
-
-void
-initbuffer (linebuffer)
- struct linebuffer *linebuffer;
-{
- linebuffer->size = 200;
- linebuffer->buffer = xnew (200, char);
-}
-
-/*
- * Read a line of text from `stream' into `linebuffer'.
- * Return the number of characters read from `stream',
- * which is the length of the line including the newline, if any.
- */
-long
-readline (linebuffer, stream)
- struct linebuffer *linebuffer;
- register FILE *stream;
-{
- char *buffer = linebuffer->buffer;
- register char *p = linebuffer->buffer;
- register char *pend;
- int newline; /* 1 if ended with newline, 0 if ended with EOF */
-
- pend = p + linebuffer->size; /* Separate to avoid 386/IX compiler bug. */
-
- while (1)
- {
- register int c = getc (stream);
- if (p == pend)
- {
- linebuffer->size *= 2;
- buffer = (char *) xrealloc (buffer, linebuffer->size);
- p += buffer - linebuffer->buffer;
- pend = buffer + linebuffer->size;
- linebuffer->buffer = buffer;
- }
- if (c == EOF || c == '\n')
- {
- *p = 0;
- newline = (c == '\n') ? 1 : 0;
- break;
- }
- *p++ = c;
- }
-
- return p - buffer + newline;
-}
-\f
-char *
-savestr (cp)
- char *cp;
-{
- return savenstr (cp, strlen (cp));
-}
-
-char *
-savenstr (cp, len)
- char *cp;
- int len;
-{
- register char *dp;
-
- dp = xnew (len + 1, char);
- strncpy (dp, cp, len);
- dp[len] = '\0';
- return dp;
-}
-
-/*
- * Return the ptr in sp at which the character c last
- * appears; NULL if not found
- *
- * Identical to v7 rindex, included for portability.
- */
-
-char *
-etags_rindex (sp, c)
- register char *sp, c;
-{
- register char *r;
-
- r = NULL;
- do
- {
- if (*sp == c)
- r = sp;
- } while (*sp++);
- return (r);
-}
-
-
-/*
- * Return the ptr in sp at which the character c first
- * appears; NULL if not found
- *
- * Identical to v7 index, included for portability.
- */
-
-char *
-etags_index (sp, c)
- register char *sp, c;
-{
- do
- {
- if (*sp == c)
- return (sp);
- } while (*sp++);
- return (NULL);
-}
-
-/* Print error message and exit. */
-
-/* VARARGS1 */
-void
-fatal (s1, s2)
- char *s1, *s2;
-{
- error (s1, s2);
- exit (BAD);
-}
-
-/* Print error message. `s1' is printf control string, `s2' is arg for it. */
-
-/* VARARGS1 */
-void
-error (s1, s2)
- char *s1, *s2;
-{
- fprintf (stderr, "%s: ", progname);
- fprintf (stderr, s1, s2);
- fprintf (stderr, "\n");
-}
-
-/* Return a newly-allocated string whose contents concatenate those of s1, s2, s3. */
-
-char *
-concat (s1, s2, s3)
- char *s1, *s2, *s3;
-{
- int len1 = strlen (s1), len2 = strlen (s2), len3 = strlen (s3);
- char *result = xnew (len1 + len2 + len3 + 1, char);
-
- strcpy (result, s1);
- strcpy (result + len1, s2);
- strcpy (result + len1 + len2, s3);
- *(result + len1 + len2 + len3) = 0;
-
- return result;
-}
-
-/* Like malloc but get fatal error if memory is exhausted. */
-
-char *
-xmalloc (size)
- unsigned int size;
-{
- char *result = (char *) malloc (size);
- if (result == NULL)
- fatal ("virtual memory exhausted", 0);
- return result;
-}
-
-char *
-xrealloc (ptr, size)
- char *ptr;
- unsigned int size;
-{
- char *result = (char *) realloc (ptr, size);
- if (result == NULL)
- fatal ("virtual memory exhausted");
- return result;
-}
+/* Tags file maker to go with GNU Emacs
+ Copyright (C) 1984, 87, 88, 89, 93, 94, 95, 98, 99, 2000
+ Free Software Foundation, Inc. and Ken Arnold
+
+This file is not considered part of GNU Emacs.
+
+This program is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2 of the License, or
+(at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software Foundation,
+Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+
+/*
+ * Authors:
+ * Ctags originally by Ken Arnold.
+ * Fortran added by Jim Kleckner.
+ * Ed Pelegri-Llopart added C typedefs.
+ * Gnu Emacs TAGS format and modifications by RMS?
+ * Sam Kendall added C++.
+ * Francesco Potorti` reorganised C and C++ based on work by Joe Wells.
+ * Regexp tags by Tom Tromey.
+ *
+ * Francesco Potorti` (pot@gnu.org) is the current maintainer.
+ */
+
+char pot_etags_version[] = "@(#) pot revision number is 13.44";
+
+#define TRUE 1
+#define FALSE 0
+
+#ifndef DEBUG
+# define DEBUG FALSE
+#endif
+
+#if defined(__STDC__) && (__STDC__ || defined(__SUNPRO_C))
+# define P_(proto) proto
+#else
+# define P_(proto) ()
+#endif
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+ /* On some systems, Emacs defines static as nothing for the sake
+ of unexec. We don't want that here since we don't use unexec. */
+# undef static
+# define ETAGS_REGEXPS /* use the regexp features */
+# define LONG_OPTIONS /* accept long options */
+#endif /* HAVE_CONFIG_H */
+
+#ifndef _GNU_SOURCE
+# define _GNU_SOURCE 1 /* enables some compiler checks on GNU */
+#endif
+
+#ifdef MSDOS
+# undef MSDOS
+# define MSDOS TRUE
+# include <fcntl.h>
+# include <sys/param.h>
+# include <io.h>
+# ifndef HAVE_CONFIG_H
+# define DOS_NT
+# include <sys/config.h>
+# endif
+#else
+# define MSDOS FALSE
+#endif /* MSDOS */
+
+#ifdef WINDOWSNT
+# include <stdlib.h>
+# include <fcntl.h>
+# include <string.h>
+# include <direct.h>
+# include <io.h>
+# define MAXPATHLEN _MAX_PATH
+# ifdef HAVE_CONFIG_H
+# undef HAVE_NTGUI
+# else
+# define DOS_NT
+# endif /* not HAVE_CONFIG_H */
+# ifndef HAVE_GETCWD
+# define HAVE_GETCWD
+# endif /* undef HAVE_GETCWD */
+#else /* !WINDOWSNT */
+# ifdef STDC_HEADERS
+# include <stdlib.h>
+# include <string.h>
+# else
+ extern char *getenv ();
+# endif
+#endif /* !WINDOWSNT */
+
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#else
+# if defined (HAVE_GETCWD) && !WINDOWSNT
+ extern char *getcwd (char *buf, size_t size);
+# endif
+#endif /* HAVE_UNISTD_H */
+
+#include <stdio.h>
+#include <ctype.h>
+#include <errno.h>
+#ifndef errno
+ extern int errno;
+#endif
+#include <sys/types.h>
+#include <sys/stat.h>
+
+#if !defined (S_ISREG) && defined (S_IFREG)
+# define S_ISREG(m) (((m) & S_IFMT) == S_IFREG)
+#endif
+
+#ifdef LONG_OPTIONS
+# include <getopt.h>
+#else
+# define getopt_long(argc,argv,optstr,lopts,lind) getopt (argc, argv, optstr)
+ extern char *optarg;
+ extern int optind, opterr;
+#endif /* LONG_OPTIONS */
+
+#ifdef ETAGS_REGEXPS
+# include <regex.h>
+#endif /* ETAGS_REGEXPS */
+
+/* Define CTAGS to make the program "ctags" compatible with the usual one.
+ Leave it undefined to make the program "etags", which makes emacs-style
+ tag tables and tags typedefs, #defines and struct/union/enum by default. */
+#ifdef CTAGS
+# undef CTAGS
+# define CTAGS TRUE
+#else
+# define CTAGS FALSE
+#endif
+
+/* Exit codes for success and failure. */
+#ifdef VMS
+# define GOOD 1
+# define BAD 0
+#else
+# define GOOD 0
+# define BAD 1
+#endif
+
+/* C extensions. */
+#define C_PLPL 0x00001 /* C++ */
+#define C_STAR 0x00003 /* C* */
+#define C_JAVA 0x00005 /* JAVA */
+#define YACC 0x10000 /* yacc file */
+
+#define streq(s,t) ((DEBUG && (s) == NULL && (t) == NULL \
+ && (abort (), 1)) || !strcmp (s, t))
+#define strneq(s,t,n) ((DEBUG && (s) == NULL && (t) == NULL \
+ && (abort (), 1)) || !strncmp (s, t, n))
+
+#define lowcase(c) tolower ((char)c)
+
+#define CHARS 256 /* 2^sizeof(char) */
+#define CHAR(x) ((unsigned int)x & (CHARS - 1))
+#define iswhite(c) (_wht[CHAR(c)]) /* c is white */
+#define notinname(c) (_nin[CHAR(c)]) /* c is not in a name */
+#define begtoken(c) (_btk[CHAR(c)]) /* c can start token */
+#define intoken(c) (_itk[CHAR(c)]) /* c can be in token */
+#define endtoken(c) (_etk[CHAR(c)]) /* c ends tokens */
+
+
+/*
+ * xnew, xrnew -- allocate, reallocate storage
+ *
+ * SYNOPSIS: Type *xnew (int n, Type);
+ * Type *xrnew (OldPointer, int n, Type);
+ */
+#ifdef chkmalloc
+# include "chkmalloc.h"
+# define xnew(n,Type) ((Type *) trace_malloc (__FILE__, __LINE__, \
+ (n) * sizeof (Type)))
+# define xrnew(op,n,Type) ((Type *) trace_realloc (__FILE__, __LINE__, \
+ (op), (n) * sizeof (Type)))
+#else
+# define xnew(n,Type) ((Type *) xmalloc ((n) * sizeof (Type)))
+# define xrnew(op,n,Type) ((Type *) xrealloc ((op), (n) * sizeof (Type)))
+#endif
+
+typedef int bool;
+
+typedef void Lang_function P_((FILE *));
+
+typedef struct
+{
+ char *suffix;
+ char *command; /* Takes one arg and decompresses to stdout */
+} compressor;
+
+typedef struct
+{
+ char *name;
+ Lang_function *function;
+ char **suffixes;
+ char **interpreters;
+} language;
+
+typedef struct node_st
+{ /* sorting structure */
+ char *name; /* function or type name */
+ char *file; /* file name */
+ bool is_func; /* use pattern or line no */
+ bool been_warned; /* set if noticed dup */
+ int lno; /* line number tag is on */
+ long cno; /* character number line starts on */
+ char *pat; /* search pattern */
+ struct node_st *left, *right; /* left and right sons */
+} node;
+
+/*
+ * A `linebuffer' is a structure which holds a line of text.
+ * `readline_internal' reads a line from a stream into a linebuffer
+ * and works regardless of the length of the line.
+ * SIZE is the size of BUFFER, LEN is the length of the string in
+ * BUFFER after readline reads it.
+ */
+typedef struct
+{
+ long size;
+ int len;
+ char *buffer;
+} linebuffer;
+
+/* Many compilers barf on this:
+ Lang_function Ada_funcs;
+ so let's write it this way */
+static void Ada_funcs P_((FILE *));
+static void Asm_labels P_((FILE *));
+static void C_entries P_((int c_ext, FILE *));
+static void default_C_entries P_((FILE *));
+static void plain_C_entries P_((FILE *));
+static void Cjava_entries P_((FILE *));
+static void Cobol_paragraphs P_((FILE *));
+static void Cplusplus_entries P_((FILE *));
+static void Cstar_entries P_((FILE *));
+static void Erlang_functions P_((FILE *));
+static void Fortran_functions P_((FILE *));
+static void Yacc_entries P_((FILE *));
+static void Lisp_functions P_((FILE *));
+static void Pascal_functions P_((FILE *));
+static void Perl_functions P_((FILE *));
+static void Postscript_functions P_((FILE *));
+static void Prolog_functions P_((FILE *));
+static void Python_functions P_((FILE *));
+static void Scheme_functions P_((FILE *));
+static void TeX_functions P_((FILE *));
+static void Texinfo_functions P_ ((FILE *));
+static void just_read_file P_((FILE *));
+
+static void print_language_names P_((void));
+static void print_version P_((void));
+static void print_help P_((void));
+int main P_((int, char **));
+static int number_len P_((long));
+
+static compressor *get_compressor_from_suffix P_((char *, char **));
+static language *get_language_from_name P_((char *));
+static language *get_language_from_interpreter P_((char *));
+static language *get_language_from_suffix P_((char *));
+static int total_size_of_entries P_((node *));
+static long readline P_((linebuffer *, FILE *));
+static long readline_internal P_((linebuffer *, FILE *));
+static void get_tag P_((char *));
+
+#ifdef ETAGS_REGEXPS
+static void analyse_regex P_((char *, bool));
+static void add_regex P_((char *, bool, language *));
+static void free_patterns P_((void));
+#endif /* ETAGS_REGEXPS */
+static void error P_((const char *, const char *));
+static void suggest_asking_for_help P_((void));
+static void fatal P_((char *, char *));
+static void pfatal P_((char *));
+static void add_node P_((node *, node **));
+
+static void init P_((void));
+static void initbuffer P_((linebuffer *));
+static void find_entries P_((char *, FILE *));
+static void free_tree P_((node *));
+static void pfnote P_((char *, bool, char *, int, int, long));
+static void new_pfnote P_((char *, int, bool, char *, int, int, long));
+static void process_file P_((char *));
+static void put_entries P_((node *));
+static void takeprec P_((void));
+
+static char *concat P_((char *, char *, char *));
+static char *skip_spaces P_((char *));
+static char *skip_non_spaces P_((char *));
+static char *savenstr P_((char *, int));
+static char *savestr P_((char *));
+static char *etags_strchr P_((const char *, int));
+static char *etags_strrchr P_((const char *, int));
+static char *etags_getcwd P_((void));
+static char *relative_filename P_((char *, char *));
+static char *absolute_filename P_((char *, char *));
+static char *absolute_dirname P_((char *, char *));
+static bool filename_is_absolute P_((char *f));
+static void canonicalize_filename P_((char *));
+static void grow_linebuffer P_((linebuffer *, int));
+long *xmalloc P_((unsigned int));
+long *xrealloc P_((char *, unsigned int));
+
+\f
+char searchar = '/'; /* use /.../ searches */
+
+char *tagfile; /* output file */
+char *progname; /* name this program was invoked with */
+char *cwd; /* current working directory */
+char *tagfiledir; /* directory of tagfile */
+FILE *tagf; /* ioptr for tags file */
+
+char *curfile; /* current input file name */
+language *curlang; /* current language */
+
+int lineno; /* line number of current line */
+long charno; /* current character number */
+long linecharno; /* charno of start of current line */
+char *dbp; /* pointer to start of current tag */
+
+node *head; /* the head of the binary tree of tags */
+
+linebuffer lb; /* the current line */
+linebuffer token_name; /* used by C_entries as a temporary area */
+struct
+{
+ long linepos;
+ linebuffer lb; /* used by C_entries instead of lb */
+} lbs[2];
+
+/* boolean "functions" (see init) */
+bool _wht[CHARS], _nin[CHARS], _itk[CHARS], _btk[CHARS], _etk[CHARS];
+char
+ /* white chars */
+ *white = " \f\t\n\r\v",
+ /* not in a name */
+ *nonam = " \f\t\n\r(=,[;",
+ /* token ending chars */
+ *endtk = " \t\n\r\"'#()[]{}=-+%*/&|^~!<>;,.:?",
+ /* token starting chars */
+ *begtk = "ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz$~@",
+ /* valid in-token chars */
+ *midtk = "ABCDEFGHIJKLMNOPQRSTUVWXYZ_abcdefghijklmnopqrstuvwxyz$0123456789";
+
+bool append_to_tagfile; /* -a: append to tags */
+/* The following four default to TRUE for etags, but to FALSE for ctags. */
+bool typedefs; /* -t: create tags for C and Ada typedefs */
+bool typedefs_and_cplusplus; /* -T: create tags for C typedefs, level */
+ /* 0 struct/enum/union decls, and C++ */
+ /* member functions. */
+bool constantypedefs; /* -d: create tags for C #define, enum */
+ /* constants and variables. */
+ /* -D: opposite of -d. Default under ctags. */
+bool declarations; /* --declarations: tag them and extern in C&Co*/
+bool globals; /* create tags for global variables */
+bool members; /* create tags for C member variables */
+bool update; /* -u: update tags */
+bool vgrind_style; /* -v: create vgrind style index output */
+bool no_warnings; /* -w: suppress warnings */
+bool cxref_style; /* -x: create cxref style output */
+bool cplusplus; /* .[hc] means C++, not C */
+bool noindentypedefs; /* -I: ignore indentation in C */
+bool packages_only; /* --packages-only: in Ada, only tag packages*/
+
+#ifdef LONG_OPTIONS
+struct option longopts[] =
+{
+ { "packages-only", no_argument, &packages_only, TRUE },
+ { "append", no_argument, NULL, 'a' },
+ { "backward-search", no_argument, NULL, 'B' },
+ { "c++", no_argument, NULL, 'C' },
+ { "cxref", no_argument, NULL, 'x' },
+ { "defines", no_argument, NULL, 'd' },
+ { "declarations", no_argument, &declarations, TRUE },
+ { "no-defines", no_argument, NULL, 'D' },
+ { "globals", no_argument, &globals, TRUE },
+ { "no-globals", no_argument, &globals, FALSE },
+ { "help", no_argument, NULL, 'h' },
+ { "help", no_argument, NULL, 'H' },
+ { "ignore-indentation", no_argument, NULL, 'I' },
+ { "include", required_argument, NULL, 'i' },
+ { "language", required_argument, NULL, 'l' },
+ { "members", no_argument, &members, TRUE },
+ { "no-members", no_argument, &members, FALSE },
+ { "no-warn", no_argument, NULL, 'w' },
+ { "output", required_argument, NULL, 'o' },
+#ifdef ETAGS_REGEXPS
+ { "regex", required_argument, NULL, 'r' },
+ { "no-regex", no_argument, NULL, 'R' },
+ { "ignore-case-regex", required_argument, NULL, 'c' },
+#endif /* ETAGS_REGEXPS */
+ { "typedefs", no_argument, NULL, 't' },
+ { "typedefs-and-c++", no_argument, NULL, 'T' },
+ { "update", no_argument, NULL, 'u' },
+ { "version", no_argument, NULL, 'V' },
+ { "vgrind", no_argument, NULL, 'v' },
+ { NULL }
+};
+#endif /* LONG_OPTIONS */
+
+#ifdef ETAGS_REGEXPS
+/* Structure defining a regular expression. Elements are
+ the compiled pattern, and the name string. */
+typedef struct pattern
+{
+ struct pattern *p_next;
+ language *language;
+ char *regex;
+ struct re_pattern_buffer *pattern;
+ struct re_registers regs;
+ char *name_pattern;
+ bool error_signaled;
+} pattern;
+
+/* List of all regexps. */
+pattern *p_head = NULL;
+
+/* How many characters in the character set. (From regex.c.) */
+#define CHAR_SET_SIZE 256
+/* Translation table for case-insensitive matching. */
+char lc_trans[CHAR_SET_SIZE];
+#endif /* ETAGS_REGEXPS */
+
+compressor compressors[] =
+{
+ { "z", "gzip -d -c"},
+ { "Z", "gzip -d -c"},
+ { "gz", "gzip -d -c"},
+ { "GZ", "gzip -d -c"},
+ { "bz2", "bzip2 -d -c" },
+ { NULL }
+};
+
+/*
+ * Language stuff.
+ */
+
+/* Non-NULL if language fixed. */
+language *forced_lang = NULL;
+
+/* Ada code */
+char *Ada_suffixes [] =
+ { "ads", "adb", "ada", NULL };
+
+/* Assembly code */
+char *Asm_suffixes [] = { "a", /* Unix assembler */
+ "asm", /* Microcontroller assembly */
+ "def", /* BSO/Tasking definition includes */
+ "inc", /* Microcontroller include files */
+ "ins", /* Microcontroller include files */
+ "s", "sa", /* Unix assembler */
+ "S", /* cpp-processed Unix assembler */
+ "src", /* BSO/Tasking C compiler output */
+ NULL
+ };
+
+/* Note that .c and .h can be considered C++, if the --c++ flag was
+ given. That is why default_C_entries is called here. */
+char *default_C_suffixes [] =
+ { "c", "h", NULL };
+
+char *Cplusplus_suffixes [] =
+ { "C", "H", "c++", "cc", "cpp", "cxx", "h++", "hh", "hpp", "hxx",
+ "M", /* Objective C++ */
+ "pdb", /* Postscript with C syntax */
+ NULL };
+
+char *Cjava_suffixes [] =
+ { "java", NULL };
+
+char *Cobol_suffixes [] =
+ { "COB", "cob", NULL };
+
+char *Cstar_suffixes [] =
+ { "cs", "hs", NULL };
+
+char *Erlang_suffixes [] =
+ { "erl", "hrl", NULL };
+
+char *Fortran_suffixes [] =
+ { "F", "f", "f90", "for", NULL };
+
+char *Lisp_suffixes [] =
+ { "cl", "clisp", "el", "l", "lisp", "lsp", "ml", "LSP", NULL };
+
+char *Pascal_suffixes [] =
+ { "p", "pas", NULL };
+
+char *Perl_suffixes [] =
+ { "pl", "pm", NULL };
+char *Perl_interpreters [] =
+ { "perl", "@PERL@", NULL };
+
+char *plain_C_suffixes [] =
+ { "pc", /* Pro*C file */
+ "m", /* Objective C file */
+ "lm", /* Objective lex file */
+ NULL };
+
+char *Postscript_suffixes [] =
+ { "ps", "psw", NULL }; /* .psw is for PSWrap */
+
+char *Prolog_suffixes [] =
+ { "prolog", NULL };
+
+char *Python_suffixes [] =
+ { "py", NULL };
+
+/* Can't do the `SCM' or `scm' prefix with a version number. */
+char *Scheme_suffixes [] =
+ { "SCM", "SM", "oak", "sch", "scheme", "scm", "sm", "ss", "t", NULL };
+
+char *TeX_suffixes [] =
+ { "TeX", "bib", "clo", "cls", "ltx", "sty", "tex", NULL };
+
+char *Texinfo_suffixes [] =
+ { "texi", "txi", "texinfo", NULL };
+
+char *Yacc_suffixes [] =
+ { "y", "ym", "yy", "yxx", "y++", NULL }; /* .ym is Objective yacc file */
+
+/*
+ * Table of languages.
+ *
+ * It is ok for a given function to be listed under more than one
+ * name. I just didn't.
+ */
+
+language lang_names [] =
+{
+ { "ada", Ada_funcs, Ada_suffixes, NULL },
+ { "asm", Asm_labels, Asm_suffixes, NULL },
+ { "c", default_C_entries, default_C_suffixes, NULL },
+ { "c++", Cplusplus_entries, Cplusplus_suffixes, NULL },
+ { "c*", Cstar_entries, Cstar_suffixes, NULL },
+ { "cobol", Cobol_paragraphs, Cobol_suffixes, NULL },
+ { "erlang", Erlang_functions, Erlang_suffixes, NULL },
+ { "fortran", Fortran_functions, Fortran_suffixes, NULL },
+ { "java", Cjava_entries, Cjava_suffixes, NULL },
+ { "lisp", Lisp_functions, Lisp_suffixes, NULL },
+ { "pascal", Pascal_functions, Pascal_suffixes, NULL },
+ { "perl", Perl_functions, Perl_suffixes, Perl_interpreters },
+ { "postscript", Postscript_functions, Postscript_suffixes, NULL },
+ { "proc", plain_C_entries, plain_C_suffixes, NULL },
+ { "prolog", Prolog_functions, Prolog_suffixes, NULL },
+ { "python", Python_functions, Python_suffixes, NULL },
+ { "scheme", Scheme_functions, Scheme_suffixes, NULL },
+ { "tex", TeX_functions, TeX_suffixes, NULL },
+ { "texinfo", Texinfo_functions, Texinfo_suffixes, NULL },
+ { "yacc", Yacc_entries, Yacc_suffixes, NULL },
+ { "auto", NULL }, /* default guessing scheme */
+ { "none", just_read_file }, /* regexp matching only */
+ { NULL, NULL } /* end of list */
+};
+\f
+static void
+print_language_names ()
+{
+ language *lang;
+ char **ext;
+
+ puts ("\nThese are the currently supported languages, along with the\n\
+default file name suffixes:");
+ for (lang = lang_names; lang->name != NULL; lang++)
+ {
+ printf ("\t%s\t", lang->name);
+ if (lang->suffixes != NULL)
+ for (ext = lang->suffixes; *ext != NULL; ext++)
+ printf (" .%s", *ext);
+ puts ("");
+ }
+ puts ("Where `auto' means use default language for files based on file\n\
+name suffix, and `none' means only do regexp processing on files.\n\
+If no language is specified and no matching suffix is found,\n\
+the first line of the file is read for a sharp-bang (#!) sequence\n\
+followed by the name of an interpreter. If no such sequence is found,\n\
+Fortran is tried first; if no tags are found, C is tried next.\n\
+Compressed files are supported using gzip and bzip2.");
+}
+
+#ifndef EMACS_NAME
+# define EMACS_NAME "GNU Emacs"
+#endif
+#ifndef VERSION
+# define VERSION "21"
+#endif
+static void
+print_version ()
+{
+ printf ("%s (%s %s)\n", (CTAGS) ? "ctags" : "etags", EMACS_NAME, VERSION);
+ puts ("Copyright (C) 1999 Free Software Foundation, Inc. and Ken Arnold");
+ puts ("This program is distributed under the same terms as Emacs");
+
+ exit (GOOD);
+}
+
+static void
+print_help ()
+{
+ printf ("Usage: %s [options] [[regex-option ...] file-name] ...\n\
+\n\
+These are the options accepted by %s.\n", progname, progname);
+#ifdef LONG_OPTIONS
+ puts ("You may use unambiguous abbreviations for the long option names.");
+#else
+ puts ("Long option names do not work with this executable, as it is not\n\
+linked with GNU getopt.");
+#endif /* LONG_OPTIONS */
+ puts ("A - as file name means read names from stdin (one per line).");
+ if (!CTAGS)
+ printf (" Absolute names are stored in the output file as they are.\n\
+Relative ones are stored relative to the output file's directory.");
+ puts ("\n");
+
+ puts ("-a, --append\n\
+ Append tag entries to existing tags file.");
+
+ puts ("--packages-only\n\
+ For Ada files, only generate tags for packages .");
+
+ if (CTAGS)
+ puts ("-B, --backward-search\n\
+ Write the search commands for the tag entries using '?', the\n\
+ backward-search command instead of '/', the forward-search command.");
+
+ puts ("-C, --c++\n\
+ Treat files whose name suffix defaults to C language as C++ files.");
+
+ puts ("--declarations\n\
+ In C and derived languages, create tags for function declarations,");
+ if (CTAGS)
+ puts ("\tand create tags for extern variables if --globals is used.");
+ else
+ puts
+ ("\tand create tags for extern variables unless --no-globals is used.");
+
+ if (CTAGS)
+ puts ("-d, --defines\n\
+ Create tag entries for C #define constants and enum constants, too.");
+ else
+ puts ("-D, --no-defines\n\
+ Don't create tag entries for C #define constants and enum constants.\n\
+ This makes the tags file smaller.");
+
+ if (!CTAGS)
+ {
+ puts ("-i FILE, --include=FILE\n\
+ Include a note in tag file indicating that, when searching for\n\
+ a tag, one should also consult the tags file FILE after\n\
+ checking the current file.");
+ puts ("-l LANG, --language=LANG\n\
+ Force the following files to be considered as written in the\n\
+ named language up to the next --language=LANG option.");
+ }
+
+ if (CTAGS)
+ puts ("--globals\n\
+ Create tag entries for global variables in some languages.");
+ else
+ puts ("--no-globals\n\
+ Do not create tag entries for global variables in some\n\
+ languages. This makes the tags file smaller.");
+ puts ("--members\n\
+ Create tag entries for member variables in C and derived languages.");
+
+#ifdef ETAGS_REGEXPS
+ puts ("-r /REGEXP/, --regex=/REGEXP/ or --regex=@regexfile\n\
+ Make a tag for each line matching pattern REGEXP in the following\n\
+ files. {LANGUAGE}/REGEXP/ uses REGEXP for LANGUAGE files only.\n\
+ regexfile is a file containing one REGEXP per line.\n\
+ REGEXP is anchored (as if preceded by ^).\n\
+ The form /REGEXP/NAME/ creates a named tag.\n\
+ For example Tcl named tags can be created with:\n\
+ --regex=/proc[ \\t]+\\([^ \\t]+\\)/\\1/.");
+ puts ("-c /REGEXP/, --ignore-case-regex=/REGEXP/ or --ignore-case-regex=@regexfile\n\
+ Like -r, --regex but ignore case when matching expressions.");
+ puts ("-R, --no-regex\n\
+ Don't create tags from regexps for the following files.");
+#endif /* ETAGS_REGEXPS */
+ puts ("-o FILE, --output=FILE\n\
+ Write the tags to FILE.");
+ puts ("-I, --ignore-indentation\n\
+ Don't rely on indentation quite as much as normal. Currently,\n\
+ this means not to assume that a closing brace in the first\n\
+ column is the final brace of a function or structure\n\
+ definition in C and C++.");
+
+ if (CTAGS)
+ {
+ puts ("-t, --typedefs\n\
+ Generate tag entries for C and Ada typedefs.");
+ puts ("-T, --typedefs-and-c++\n\
+ Generate tag entries for C typedefs, C struct/enum/union tags,\n\
+ and C++ member functions.");
+ puts ("-u, --update\n\
+ Update the tag entries for the given files, leaving tag\n\
+ entries for other files in place. Currently, this is\n\
+ implemented by deleting the existing entries for the given\n\
+ files and then rewriting the new entries at the end of the\n\
+ tags file. It is often faster to simply rebuild the entire\n\
+ tag file than to use this.");
+ puts ("-v, --vgrind\n\
+ Generates an index of items intended for human consumption,\n\
+ similar to the output of vgrind. The index is sorted, and\n\
+ gives the page number of each item.");
+ puts ("-w, --no-warn\n\
+ Suppress warning messages about entries defined in multiple\n\
+ files.");
+ puts ("-x, --cxref\n\
+ Like --vgrind, but in the style of cxref, rather than vgrind.\n\
+ The output uses line numbers instead of page numbers, but\n\
+ beyond that the differences are cosmetic; try both to see\n\
+ which you like.");
+ }
+
+ puts ("-V, --version\n\
+ Print the version of the program.\n\
+-h, --help\n\
+ Print this help message.");
+
+ print_language_names ();
+
+ puts ("");
+ puts ("Report bugs to bug-gnu-emacs@gnu.org");
+
+ exit (GOOD);
+}
+
+\f
+enum argument_type
+{
+ at_language,
+ at_regexp,
+ at_filename,
+ at_icregexp
+};
+
+/* This structure helps us allow mixing of --lang and file names. */
+typedef struct
+{
+ enum argument_type arg_type;
+ char *what;
+ language *lang; /* language of the regexp */
+} argument;
+
+#ifdef VMS /* VMS specific functions */
+
+#define EOS '\0'
+
+/* This is a BUG! ANY arbitrary limit is a BUG!
+ Won't someone please fix this? */
+#define MAX_FILE_SPEC_LEN 255
+typedef struct {
+ short curlen;
+ char body[MAX_FILE_SPEC_LEN + 1];
+} vspec;
+
+/*
+ v1.05 nmm 26-Jun-86 fn_exp - expand specification of list of file names
+ returning in each successive call the next file name matching the input
+ spec. The function expects that each in_spec passed
+ to it will be processed to completion; in particular, up to and
+ including the call following that in which the last matching name
+ is returned, the function ignores the value of in_spec, and will
+ only start processing a new spec with the following call.
+ If an error occurs, on return out_spec contains the value
+ of in_spec when the error occurred.
+
+ With each successive file name returned in out_spec, the
+ function's return value is one. When there are no more matching
+ names the function returns zero. If on the first call no file
+ matches in_spec, or there is any other error, -1 is returned.
+*/
+
+#include <rmsdef.h>
+#include <descrip.h>
+#define OUTSIZE MAX_FILE_SPEC_LEN
+static short
+fn_exp (out, in)
+ vspec *out;
+ char *in;
+{
+ static long context = 0;
+ static struct dsc$descriptor_s o;
+ static struct dsc$descriptor_s i;
+ static bool pass1 = TRUE;
+ long status;
+ short retval;
+
+ if (pass1)
+ {
+ pass1 = FALSE;
+ o.dsc$a_pointer = (char *) out;
+ o.dsc$w_length = (short)OUTSIZE;
+ i.dsc$a_pointer = in;
+ i.dsc$w_length = (short)strlen(in);
+ i.dsc$b_dtype = DSC$K_DTYPE_T;
+ i.dsc$b_class = DSC$K_CLASS_S;
+ o.dsc$b_dtype = DSC$K_DTYPE_VT;
+ o.dsc$b_class = DSC$K_CLASS_VS;
+ }
+ if ((status = lib$find_file(&i, &o, &context, 0, 0)) == RMS$_NORMAL)
+ {
+ out->body[out->curlen] = EOS;
+ return 1;
+ }
+ else if (status == RMS$_NMF)
+ retval = 0;
+ else
+ {
+ strcpy(out->body, in);
+ retval = -1;
+ }
+ lib$find_file_end(&context);
+ pass1 = TRUE;
+ return retval;
+}
+
+/*
+ v1.01 nmm 19-Aug-85 gfnames - return in successive calls the
+ name of each file specified by the provided arg expanding wildcards.
+*/
+static char *
+gfnames (arg, p_error)
+ char *arg;
+ bool *p_error;
+{
+ static vspec filename = {MAX_FILE_SPEC_LEN, "\0"};
+
+ switch (fn_exp (&filename, arg))
+ {
+ case 1:
+ *p_error = FALSE;
+ return filename.body;
+ case 0:
+ *p_error = FALSE;
+ return NULL;
+ default:
+ *p_error = TRUE;
+ return filename.body;
+ }
+}
+
+#ifndef OLD /* Newer versions of VMS do provide `system'. */
+system (cmd)
+ char *cmd;
+{
+ error ("%s", "system() function not implemented under VMS");
+}
+#endif
+
+#define VERSION_DELIM ';'
+char *massage_name (s)
+ char *s;
+{
+ char *start = s;
+
+ for ( ; *s; s++)
+ if (*s == VERSION_DELIM)
+ {
+ *s = EOS;
+ break;
+ }
+ else
+ *s = lowcase (*s);
+ return start;
+}
+#endif /* VMS */
+
+\f
+int
+main (argc, argv)
+ int argc;
+ char *argv[];
+{
+ int i;
+ unsigned int nincluded_files;
+ char **included_files;
+ char *this_file;
+ argument *argbuffer;
+ int current_arg, file_count;
+ linebuffer filename_lb;
+#ifdef VMS
+ bool got_err;
+#endif
+
+#ifdef DOS_NT
+ _fmode = O_BINARY; /* all of files are treated as binary files */
+#endif /* DOS_NT */
+
+ progname = argv[0];
+ nincluded_files = 0;
+ included_files = xnew (argc, char *);
+ current_arg = 0;
+ file_count = 0;
+
+ /* Allocate enough no matter what happens. Overkill, but each one
+ is small. */
+ argbuffer = xnew (argc, argument);
+
+#ifdef ETAGS_REGEXPS
+ /* Set syntax for regular expression routines. */
+ re_set_syntax (RE_SYNTAX_EMACS | RE_INTERVALS);
+ /* Translation table for case-insensitive search. */
+ for (i = 0; i < CHAR_SET_SIZE; i++)
+ lc_trans[i] = lowcase (i);
+#endif /* ETAGS_REGEXPS */
+
+ /*
+ * If etags, always find typedefs and structure tags. Why not?
+ * Also default is to find macro constants, enum constants and
+ * global variables.
+ */
+ if (!CTAGS)
+ {
+ typedefs = typedefs_and_cplusplus = constantypedefs = TRUE;
+ globals = TRUE;
+ members = FALSE;
+ }
+
+ while (1)
+ {
+ int opt;
+ char *optstring;
+
+#ifdef ETAGS_REGEXPS
+ optstring = "-aCdDf:Il:o:r:c:RStTi:BuvxwVhH";
+#else
+ optstring = "-aCdDf:Il:o:StTi:BuvxwVhH";
+#endif /* ETAGS_REGEXPS */
+
+#ifndef LONG_OPTIONS
+ optstring = optstring + 1;
+#endif /* LONG_OPTIONS */
+
+ opt = getopt_long (argc, argv, optstring, longopts, 0);
+ if (opt == EOF)
+ break;
+
+ switch (opt)
+ {
+ case 0:
+ /* If getopt returns 0, then it has already processed a
+ long-named option. We should do nothing. */
+ break;
+
+ case 1:
+ /* This means that a file name has been seen. Record it. */
+ argbuffer[current_arg].arg_type = at_filename;
+ argbuffer[current_arg].what = optarg;
+ ++current_arg;
+ ++file_count;
+ break;
+
+ /* Common options. */
+ case 'a': append_to_tagfile = TRUE; break;
+ case 'C': cplusplus = TRUE; break;
+ case 'd': constantypedefs = TRUE; break;
+ case 'D': constantypedefs = FALSE; break;
+ case 'f': /* for compatibility with old makefiles */
+ case 'o':
+ if (tagfile)
+ {
+ error ("-o option may only be given once.", (char *)NULL);
+ suggest_asking_for_help ();
+ }
+ tagfile = optarg;
+ break;
+ case 'I':
+ case 'S': /* for backward compatibility */
+ noindentypedefs = TRUE;
+ break;
+ case 'l':
+ {
+ language *lang = get_language_from_name (optarg);
+ if (lang != NULL)
+ {
+ argbuffer[current_arg].lang = lang;
+ argbuffer[current_arg].arg_type = at_language;
+ ++current_arg;
+ }
+ }
+ break;
+#ifdef ETAGS_REGEXPS
+ case 'r':
+ argbuffer[current_arg].arg_type = at_regexp;
+ argbuffer[current_arg].what = optarg;
+ ++current_arg;
+ break;
+ case 'R':
+ argbuffer[current_arg].arg_type = at_regexp;
+ argbuffer[current_arg].what = NULL;
+ ++current_arg;
+ break;
+ case 'c':
+ argbuffer[current_arg].arg_type = at_icregexp;
+ argbuffer[current_arg].what = optarg;
+ ++current_arg;
+ break;
+#endif /* ETAGS_REGEXPS */
+ case 'V':
+ print_version ();
+ break;
+ case 'h':
+ case 'H':
+ print_help ();
+ break;
+ case 't':
+ typedefs = TRUE;
+ break;
+ case 'T':
+ typedefs = typedefs_and_cplusplus = TRUE;
+ break;
+#if (!CTAGS)
+ /* Etags options */
+ case 'i':
+ included_files[nincluded_files++] = optarg;
+ break;
+#else /* CTAGS */
+ /* Ctags options. */
+ case 'B': searchar = '?'; break;
+ case 'u': update = TRUE; break;
+ case 'v': vgrind_style = TRUE; /*FALLTHRU*/
+ case 'x': cxref_style = TRUE; break;
+ case 'w': no_warnings = TRUE; break;
+#endif /* CTAGS */
+ default:
+ suggest_asking_for_help ();
+ }
+ }
+
+ for (; optind < argc; ++optind)
+ {
+ argbuffer[current_arg].arg_type = at_filename;
+ argbuffer[current_arg].what = argv[optind];
+ ++current_arg;
+ ++file_count;
+ }
+
+ if (nincluded_files == 0 && file_count == 0)
+ {
+ error ("no input files specified.", (char *)NULL);
+ suggest_asking_for_help ();
+ }
+
+ if (tagfile == NULL)
+ tagfile = CTAGS ? "tags" : "TAGS";
+ cwd = etags_getcwd (); /* the current working directory */
+ if (cwd[strlen (cwd) - 1] != '/')
+ {
+ char *oldcwd = cwd;
+ cwd = concat (oldcwd, "/", "");
+ free (oldcwd);
+ }
+ if (streq (tagfile, "-"))
+ tagfiledir = cwd;
+ else
+ tagfiledir = absolute_dirname (tagfile, cwd);
+
+ init (); /* set up boolean "functions" */
+
+ initbuffer (&lb);
+ initbuffer (&token_name);
+ initbuffer (&lbs[0].lb);
+ initbuffer (&lbs[1].lb);
+ initbuffer (&filename_lb);
+
+ if (!CTAGS)
+ {
+ if (streq (tagfile, "-"))
+ {
+ tagf = stdout;
+#ifdef DOS_NT
+ /* Switch redirected `stdout' to binary mode (setting `_fmode'
+ doesn't take effect until after `stdout' is already open). */
+ if (!isatty (fileno (stdout)))
+ setmode (fileno (stdout), O_BINARY);
+#endif /* DOS_NT */
+ }
+ else
+ tagf = fopen (tagfile, append_to_tagfile ? "a" : "w");
+ if (tagf == NULL)
+ pfatal (tagfile);
+ }
+
+ /*
+ * Loop through files finding functions.
+ */
+ for (i = 0; i < current_arg; ++i)
+ {
+ switch (argbuffer[i].arg_type)
+ {
+ case at_language:
+ forced_lang = argbuffer[i].lang;
+ break;
+#ifdef ETAGS_REGEXPS
+ case at_regexp:
+ analyse_regex (argbuffer[i].what, FALSE);
+ break;
+ case at_icregexp:
+ analyse_regex (argbuffer[i].what, TRUE);
+ break;
+#endif
+ case at_filename:
+#ifdef VMS
+ while ((this_file = gfnames (argbuffer[i].what, &got_err)) != NULL)
+ {
+ if (got_err)
+ {
+ error ("can't find file %s\n", this_file);
+ argc--, argv++;
+ }
+ else
+ {
+ this_file = massage_name (this_file);
+ }
+#else
+ this_file = argbuffer[i].what;
+#endif
+ /* Input file named "-" means read file names from stdin
+ (one per line) and use them. */
+ if (streq (this_file, "-"))
+ while (readline_internal (&filename_lb, stdin) > 0)
+ process_file (filename_lb.buffer);
+ else
+ process_file (this_file);
+#ifdef VMS
+ }
+#endif
+ break;
+ }
+ }
+
+#ifdef ETAGS_REGEXPS
+ free_patterns ();
+#endif /* ETAGS_REGEXPS */
+
+ if (!CTAGS)
+ {
+ while (nincluded_files-- > 0)
+ fprintf (tagf, "\f\n%s,include\n", *included_files++);
+
+ fclose (tagf);
+ exit (GOOD);
+ }
+
+ /* If CTAGS, we are here. process_file did not write the tags yet,
+ because we want them ordered. Let's do it now. */
+ if (cxref_style)
+ {
+ put_entries (head);
+ free_tree (head);
+ head = NULL;
+ exit (GOOD);
+ }
+
+ if (update)
+ {
+ char cmd[BUFSIZ];
+ for (i = 0; i < current_arg; ++i)
+ {
+ if (argbuffer[i].arg_type != at_filename)
+ continue;
+ sprintf (cmd,
+ "mv %s OTAGS;fgrep -v '\t%s\t' OTAGS >%s;rm OTAGS",
+ tagfile, argbuffer[i].what, tagfile);
+ if (system (cmd) != GOOD)
+ fatal ("failed to execute shell command", (char *)NULL);
+ }
+ append_to_tagfile = TRUE;
+ }
+
+ tagf = fopen (tagfile, append_to_tagfile ? "a" : "w");
+ if (tagf == NULL)
+ pfatal (tagfile);
+ put_entries (head);
+ free_tree (head);
+ head = NULL;
+ fclose (tagf);
+
+ if (update)
+ {
+ char cmd[BUFSIZ];
+ sprintf (cmd, "sort %s -o %s", tagfile, tagfile);
+ exit (system (cmd));
+ }
+ return GOOD;
+}
+
+
+
+/*
+ * Return a compressor given the file name. If EXTPTR is non-zero,
+ * return a pointer into FILE where the compressor-specific
+ * extension begins. If no compressor is found, NULL is returned
+ * and EXTPTR is not significant.
+ * Idea by Vladimir Alexiev <vladimir@cs.ualberta.ca>
+ */
+static compressor *
+get_compressor_from_suffix (file, extptr)
+ char *file;
+ char **extptr;
+{
+ compressor *compr;
+ char *slash, *suffix;
+
+ /* This relies on FN to be after canonicalize_filename,
+ so we don't need to consider backslashes on DOS_NT. */
+ slash = etags_strrchr (file, '/');
+ suffix = etags_strrchr (file, '.');
+ if (suffix == NULL || suffix < slash)
+ return NULL;
+ if (extptr != NULL)
+ *extptr = suffix;
+ suffix += 1;
+ /* Let those poor souls who live with DOS 8+3 file name limits get
+ some solace by treating foo.cgz as if it were foo.c.gz, etc.
+ Only the first do loop is run if not MSDOS */
+ do
+ {
+ for (compr = compressors; compr->suffix != NULL; compr++)
+ if (streq (compr->suffix, suffix))
+ return compr;
+ if (!MSDOS)
+ break; /* do it only once: not really a loop */
+ if (extptr != NULL)
+ *extptr = ++suffix;
+ } while (*suffix != '\0');
+ return NULL;
+}
+
+
+
+/*
+ * Return a language given the name.
+ */
+static language *
+get_language_from_name (name)
+ char *name;
+{
+ language *lang;
+
+ if (name == NULL)
+ error ("empty language name", (char *)NULL);
+ else
+ {
+ for (lang = lang_names; lang->name != NULL; lang++)
+ if (streq (name, lang->name))
+ return lang;
+ error ("unknown language \"%s\"", name);
+ }
+
+ return NULL;
+}
+
+
+/*
+ * Return a language given the interpreter name.
+ */
+static language *
+get_language_from_interpreter (interpreter)
+ char *interpreter;
+{
+ language *lang;
+ char **iname;
+
+ if (interpreter == NULL)
+ return NULL;
+ for (lang = lang_names; lang->name != NULL; lang++)
+ if (lang->interpreters != NULL)
+ for (iname = lang->interpreters; *iname != NULL; iname++)
+ if (streq (*iname, interpreter))
+ return lang;
+
+ return NULL;
+}
+
+
+
+/*
+ * Return a language given the file name.
+ */
+static language *
+get_language_from_suffix (file)
+ char *file;
+{
+ language *lang;
+ char **ext, *suffix;
+
+ suffix = etags_strrchr (file, '.');
+ if (suffix == NULL)
+ return NULL;
+ suffix += 1;
+ for (lang = lang_names; lang->name != NULL; lang++)
+ if (lang->suffixes != NULL)
+ for (ext = lang->suffixes; *ext != NULL; ext++)
+ if (streq (*ext, suffix))
+ return lang;
+ return NULL;
+}
+
+
+
+/*
+ * This routine is called on each file argument.
+ */
+static void
+process_file (file)
+ char *file;
+{
+ struct stat stat_buf;
+ FILE *inf;
+ compressor *compr;
+ char *compressed_name, *uncompressed_name;
+ char *ext, *real_name;
+
+
+ canonicalize_filename (file);
+ if (streq (file, tagfile) && !streq (tagfile, "-"))
+ {
+ error ("skipping inclusion of %s in self.", file);
+ return;
+ }
+ if ((compr = get_compressor_from_suffix (file, &ext)) == NULL)
+ {
+ compressed_name = NULL;
+ real_name = uncompressed_name = savestr (file);
+ }
+ else
+ {
+ real_name = compressed_name = savestr (file);
+ uncompressed_name = savenstr (file, ext - file);
+ }
+
+ /* If the canonicalised uncompressed name has already be dealt with,
+ skip it silently, else add it to the list. */
+ {
+ typedef struct processed_file
+ {
+ char *filename;
+ struct processed_file *next;
+ } processed_file;
+ static processed_file *pf_head = NULL;
+ register processed_file *fnp;
+
+ for (fnp = pf_head; fnp != NULL; fnp = fnp->next)
+ if (streq (uncompressed_name, fnp->filename))
+ goto exit;
+ fnp = pf_head;
+ pf_head = xnew (1, struct processed_file);
+ pf_head->filename = savestr (uncompressed_name);
+ pf_head->next = fnp;
+ }
+
+ if (stat (real_name, &stat_buf) != 0)
+ {
+ /* Reset real_name and try with a different name. */
+ real_name = NULL;
+ if (compressed_name != NULL) /* try with the given suffix */
+ {
+ if (stat (uncompressed_name, &stat_buf) == 0)
+ real_name = uncompressed_name;
+ }
+ else /* try all possible suffixes */
+ {
+ for (compr = compressors; compr->suffix != NULL; compr++)
+ {
+ compressed_name = concat (file, ".", compr->suffix);
+ if (stat (compressed_name, &stat_buf) != 0)
+ {
+ if (MSDOS)
+ {
+ char *suf = compressed_name + strlen (file);
+ size_t suflen = strlen (compr->suffix) + 1;
+ for ( ; suf[1]; suf++, suflen--)
+ {
+ memmove (suf, suf + 1, suflen);
+ if (stat (compressed_name, &stat_buf) == 0)
+ {
+ real_name = compressed_name;
+ break;
+ }
+ }
+ if (real_name != NULL)
+ break;
+ } /* MSDOS */
+ free (compressed_name);
+ compressed_name = NULL;
+ }
+ else
+ {
+ real_name = compressed_name;
+ break;
+ }
+ }
+ }
+ if (real_name == NULL)
+ {
+ perror (file);
+ goto exit;
+ }
+ } /* try with a different name */
+
+ if (!S_ISREG (stat_buf.st_mode))
+ {
+ error ("skipping %s: it is not a regular file.", real_name);
+ goto exit;
+ }
+ if (real_name == compressed_name)
+ {
+ char *cmd = concat (compr->command, " ", real_name);
+ inf = popen (cmd, "r");
+ free (cmd);
+ }
+ else
+ inf = fopen (real_name, "r");
+ if (inf == NULL)
+ {
+ perror (real_name);
+ goto exit;
+ }
+
+ find_entries (uncompressed_name, inf);
+
+ if (real_name == compressed_name)
+ pclose (inf);
+ else
+ fclose (inf);
+
+ if (!CTAGS)
+ {
+ char *filename;
+
+ if (filename_is_absolute (uncompressed_name))
+ {
+ /* file is an absolute file name. Canonicalise it. */
+ filename = absolute_filename (uncompressed_name, cwd);
+ }
+ else
+ {
+ /* file is a file name relative to cwd. Make it relative
+ to the directory of the tags file. */
+ filename = relative_filename (uncompressed_name, tagfiledir);
+ }
+ fprintf (tagf, "\f\n%s,%d\n", filename, total_size_of_entries (head));
+ free (filename);
+ put_entries (head);
+ free_tree (head);
+ head = NULL;
+ }
+
+ exit:
+ if (compressed_name) free(compressed_name);
+ if (uncompressed_name) free(uncompressed_name);
+ return;
+}
+
+/*
+ * This routine sets up the boolean pseudo-functions which work
+ * by setting boolean flags dependent upon the corresponding character.
+ * Every char which is NOT in that string is not a white char. Therefore,
+ * all of the array "_wht" is set to FALSE, and then the elements
+ * subscripted by the chars in "white" are set to TRUE. Thus "_wht"
+ * of a char is TRUE if it is the string "white", else FALSE.
+ */
+static void
+init ()
+{
+ register char *sp;
+ register int i;
+
+ for (i = 0; i < CHARS; i++)
+ iswhite(i) = notinname(i) = begtoken(i) = intoken(i) = endtoken(i) = FALSE;
+ for (sp = white; *sp != '\0'; sp++) iswhite (*sp) = TRUE;
+ for (sp = nonam; *sp != '\0'; sp++) notinname (*sp) = TRUE;
+ notinname('\0') = notinname('\n');
+ for (sp = begtk; *sp != '\0'; sp++) begtoken (*sp) = TRUE;
+ begtoken('\0') = begtoken('\n');
+ for (sp = midtk; *sp != '\0'; sp++) intoken (*sp) = TRUE;
+ intoken('\0') = intoken('\n');
+ for (sp = endtk; *sp != '\0'; sp++) endtoken (*sp) = TRUE;
+ endtoken('\0') = endtoken('\n');
+}
+
+/*
+ * This routine opens the specified file and calls the function
+ * which finds the function and type definitions.
+ */
+node *last_node = NULL;
+
+static void
+find_entries (file, inf)
+ char *file;
+ FILE *inf;
+{
+ char *cp;
+ language *lang;
+ node *old_last_node;
+
+ /* Memory leakage here: the string pointed by curfile is
+ never released, because curfile is copied into np->file
+ for each node, to be used in CTAGS mode. The amount of
+ memory leaked here is the sum of the lengths of the
+ file names. */
+ curfile = savestr (file);
+
+ /* If user specified a language, use it. */
+ lang = forced_lang;
+ if (lang != NULL && lang->function != NULL)
+ {
+ curlang = lang;
+ lang->function (inf);
+ return;
+ }
+
+ /* Try to guess the language given the file name. */
+ lang = get_language_from_suffix (file);
+ if (lang != NULL && lang->function != NULL)
+ {
+ curlang = lang;
+ lang->function (inf);
+ return;
+ }
+
+ /* Look for sharp-bang as the first two characters. */
+ if (readline_internal (&lb, inf) > 0
+ && lb.len >= 2
+ && lb.buffer[0] == '#'
+ && lb.buffer[1] == '!')
+ {
+ char *lp;
+
+ /* Set lp to point at the first char after the last slash in the
+ line or, if no slashes, at the first nonblank. Then set cp to
+ the first successive blank and terminate the string. */
+ lp = etags_strrchr (lb.buffer+2, '/');
+ if (lp != NULL)
+ lp += 1;
+ else
+ lp = skip_spaces (lb.buffer + 2);
+ cp = skip_non_spaces (lp);
+ *cp = '\0';
+
+ if (strlen (lp) > 0)
+ {
+ lang = get_language_from_interpreter (lp);
+ if (lang != NULL && lang->function != NULL)
+ {
+ curlang = lang;
+ lang->function (inf);
+ return;
+ }
+ }
+ }
+ /* We rewind here, even if inf may be a pipe. We fail if the
+ length of the first line is longer than the pipe block size,
+ which is unlikely. */
+ rewind (inf);
+
+ /* Try Fortran. */
+ old_last_node = last_node;
+ curlang = get_language_from_name ("fortran");
+ Fortran_functions (inf);
+
+ /* No Fortran entries found. Try C. */
+ if (old_last_node == last_node)
+ {
+ /* We do not tag if rewind fails.
+ Only the file name will be recorded in the tags file. */
+ rewind (inf);
+ curlang = get_language_from_name (cplusplus ? "c++" : "c");
+ default_C_entries (inf);
+ }
+ return;
+}
+\f
+/* Record a tag. */
+static void
+pfnote (name, is_func, linestart, linelen, lno, cno)
+ char *name; /* tag name, or NULL if unnamed */
+ bool is_func; /* tag is a function */
+ char *linestart; /* start of the line where tag is */
+ int linelen; /* length of the line where tag is */
+ int lno; /* line number */
+ long cno; /* character number */
+{
+ register node *np;
+
+ if (CTAGS && name == NULL)
+ return;
+
+ np = xnew (1, node);
+
+ /* If ctags mode, change name "main" to M<thisfilename>. */
+ if (CTAGS && !cxref_style && streq (name, "main"))
+ {
+ register char *fp = etags_strrchr (curfile, '/');
+ np->name = concat ("M", fp == NULL ? curfile : fp + 1, "");
+ fp = etags_strrchr (np->name, '.');
+ if (fp != NULL && fp[1] != '\0' && fp[2] == '\0')
+ fp[0] = '\0';
+ }
+ else
+ np->name = name;
+ np->been_warned = FALSE;
+ np->file = curfile;
+ np->is_func = is_func;
+ np->lno = lno;
+ /* Our char numbers are 0-base, because of C language tradition?
+ ctags compatibility? old versions compatibility? I don't know.
+ Anyway, since emacs's are 1-base we expect etags.el to take care
+ of the difference. If we wanted to have 1-based numbers, we would
+ uncomment the +1 below. */
+ np->cno = cno /* + 1 */ ;
+ np->left = np->right = NULL;
+ if (CTAGS && !cxref_style)
+ {
+ if (strlen (linestart) < 50)
+ np->pat = concat (linestart, "$", "");
+ else
+ np->pat = savenstr (linestart, 50);
+ }
+ else
+ np->pat = savenstr (linestart, linelen);
+
+ add_node (np, &head);
+}
+
+/* Date: Wed, 22 Jan 1997 02:56:31 -0500 [last amended 18 Sep 1997]
+ * From: Sam Kendall <kendall@mv.mv.com>
+ * Subject: Proposal for firming up the TAGS format specification
+ * To: F.Potorti@cnuce.cnr.it
+ *
+ * pfnote should emit the optimized form [unnamed tag] only if:
+ * 1. name does not contain any of the characters " \t\r\n(),;";
+ * 2. linestart contains name as either a rightmost, or rightmost but
+ * one character, substring;
+ * 3. the character, if any, immediately before name in linestart must
+ * be one of the characters " \t(),;";
+ * 4. the character, if any, immediately after name in linestart must
+ * also be one of the characters " \t(),;".
+ *
+ * The real implementation uses the notinname() macro, which recognises
+ * characters slightly different form " \t\r\n(),;". See the variable
+ * `nonam'.
+ */
+#define traditional_tag_style TRUE
+static void
+new_pfnote (name, namelen, is_func, linestart, linelen, lno, cno)
+ char *name; /* tag name, or NULL if unnamed */
+ int namelen; /* tag length */
+ bool is_func; /* tag is a function */
+ char *linestart; /* start of the line where tag is */
+ int linelen; /* length of the line where tag is */
+ int lno; /* line number */
+ long cno; /* character number */
+{
+ register char *cp;
+ bool named;
+
+ named = TRUE;
+ if (!CTAGS)
+ {
+ for (cp = name; !notinname (*cp); cp++)
+ continue;
+ if (*cp == '\0') /* rule #1 */
+ {
+ cp = linestart + linelen - namelen;
+ if (notinname (linestart[linelen-1]))
+ cp -= 1; /* rule #4 */
+ if (cp >= linestart /* rule #2 */
+ && (cp == linestart
+ || notinname (cp[-1])) /* rule #3 */
+ && strneq (name, cp, namelen)) /* rule #2 */
+ named = FALSE; /* use unnamed tag */
+ }
+ }
+
+ if (named)
+ name = savenstr (name, namelen);
+ else
+ name = NULL;
+ pfnote (name, is_func, linestart, linelen, lno, cno);
+}
+
+/*
+ * free_tree ()
+ * recurse on left children, iterate on right children.
+ */
+static void
+free_tree (np)
+ register node *np;
+{
+ while (np)
+ {
+ register node *node_right = np->right;
+ free_tree (np->left);
+ if (np->name != NULL)
+ free (np->name);
+ free (np->pat);
+ free (np);
+ np = node_right;
+ }
+}
+
+/*
+ * add_node ()
+ * Adds a node to the tree of nodes. In etags mode, we don't keep
+ * it sorted; we just keep a linear list. In ctags mode, maintain
+ * an ordered tree, with no attempt at balancing.
+ *
+ * add_node is the only function allowed to add nodes, so it can
+ * maintain state.
+ */
+static void
+add_node (np, cur_node_p)
+ node *np, **cur_node_p;
+{
+ register int dif;
+ register node *cur_node = *cur_node_p;
+
+ if (cur_node == NULL)
+ {
+ *cur_node_p = np;
+ last_node = np;
+ return;
+ }
+
+ if (!CTAGS)
+ {
+ /* Etags Mode */
+ if (last_node == NULL)
+ fatal ("internal error in add_node", (char *)NULL);
+ last_node->right = np;
+ last_node = np;
+ }
+ else
+ {
+ /* Ctags Mode */
+ dif = strcmp (np->name, cur_node->name);
+
+ /*
+ * If this tag name matches an existing one, then
+ * do not add the node, but maybe print a warning.
+ */
+ if (!dif)
+ {
+ if (streq (np->file, cur_node->file))
+ {
+ if (!no_warnings)
+ {
+ fprintf (stderr, "Duplicate entry in file %s, line %d: %s\n",
+ np->file, lineno, np->name);
+ fprintf (stderr, "Second entry ignored\n");
+ }
+ }
+ else if (!cur_node->been_warned && !no_warnings)
+ {
+ fprintf
+ (stderr,
+ "Duplicate entry in files %s and %s: %s (Warning only)\n",
+ np->file, cur_node->file, np->name);
+ cur_node->been_warned = TRUE;
+ }
+ return;
+ }
+
+ /* Actually add the node */
+ add_node (np, dif < 0 ? &cur_node->left : &cur_node->right);
+ }
+}
+\f
+static void
+put_entries (np)
+ register node *np;
+{
+ register char *sp;
+
+ if (np == NULL)
+ return;
+
+ /* Output subentries that precede this one */
+ put_entries (np->left);
+
+ /* Output this entry */
+
+ if (!CTAGS)
+ {
+ if (np->name != NULL)
+ fprintf (tagf, "%s\177%s\001%d,%ld\n",
+ np->pat, np->name, np->lno, np->cno);
+ else
+ fprintf (tagf, "%s\177%d,%ld\n",
+ np->pat, np->lno, np->cno);
+ }
+ else
+ {
+ if (np->name == NULL)
+ error ("internal error: NULL name in ctags mode.", (char *)NULL);
+
+ if (cxref_style)
+ {
+ if (vgrind_style)
+ fprintf (stdout, "%s %s %d\n",
+ np->name, np->file, (np->lno + 63) / 64);
+ else
+ fprintf (stdout, "%-16s %3d %-16s %s\n",
+ np->name, np->lno, np->file, np->pat);
+ }
+ else
+ {
+ fprintf (tagf, "%s\t%s\t", np->name, np->file);
+
+ if (np->is_func)
+ { /* a function */
+ putc (searchar, tagf);
+ putc ('^', tagf);
+
+ for (sp = np->pat; *sp; sp++)
+ {
+ if (*sp == '\\' || *sp == searchar)
+ putc ('\\', tagf);
+ putc (*sp, tagf);
+ }
+ putc (searchar, tagf);
+ }
+ else
+ { /* a typedef; text pattern inadequate */
+ fprintf (tagf, "%d", np->lno);
+ }
+ putc ('\n', tagf);
+ }
+ }
+
+ /* Output subentries that follow this one */
+ put_entries (np->right);
+}
+
+/* Length of a number's decimal representation. */
+static int
+number_len (num)
+ long num;
+{
+ int len = 1;
+ while ((num /= 10) > 0)
+ len += 1;
+ return len;
+}
+
+/*
+ * Return total number of characters that put_entries will output for
+ * the nodes in the subtree of the specified node. Works only if
+ * we are not ctags, but called only in that case. This count
+ * is irrelevant with the new tags.el, but is still supplied for
+ * backward compatibility.
+ */
+static int
+total_size_of_entries (np)
+ register node *np;
+{
+ register int total;
+
+ if (np == NULL)
+ return 0;
+
+ for (total = 0; np != NULL; np = np->right)
+ {
+ /* Count left subentries. */
+ total += total_size_of_entries (np->left);
+
+ /* Count this entry */
+ total += strlen (np->pat) + 1;
+ total += number_len ((long) np->lno) + 1 + number_len (np->cno) + 1;
+ if (np->name != NULL)
+ total += 1 + strlen (np->name); /* \001name */
+ }
+
+ return total;
+}
+\f
+/*
+ * The C symbol tables.
+ */
+enum sym_type
+{
+ st_none,
+ st_C_objprot, st_C_objimpl, st_C_objend,
+ st_C_gnumacro,
+ st_C_ignore,
+ st_C_javastruct,
+ st_C_operator,
+ st_C_struct, st_C_extern, st_C_enum, st_C_define, st_C_typedef, st_C_typespec
+};
+
+static unsigned int hash P_((const char *, unsigned int));
+static struct C_stab_entry * in_word_set P_((const char *, unsigned int));
+static enum sym_type C_symtype P_((char *, int, int));
+
+/* Feed stuff between (but not including) %[ and %] lines to:
+ gperf -c -k 1,3 -o -p -r -t
+%[
+struct C_stab_entry { char *name; int c_ext; enum sym_type type; }
+%%
+if, 0, st_C_ignore
+for, 0, st_C_ignore
+while, 0, st_C_ignore
+switch, 0, st_C_ignore
+return, 0, st_C_ignore
+@interface, 0, st_C_objprot
+@protocol, 0, st_C_objprot
+@implementation,0, st_C_objimpl
+@end, 0, st_C_objend
+import, C_JAVA, st_C_ignore
+package, C_JAVA, st_C_ignore
+friend, C_PLPL, st_C_ignore
+extends, C_JAVA, st_C_javastruct
+implements, C_JAVA, st_C_javastruct
+interface, C_JAVA, st_C_struct
+class, C_PLPL, st_C_struct
+namespace, C_PLPL, st_C_struct
+domain, C_STAR, st_C_struct
+union, 0, st_C_struct
+struct, 0, st_C_struct
+extern, 0, st_C_extern
+enum, 0, st_C_enum
+typedef, 0, st_C_typedef
+define, 0, st_C_define
+operator, C_PLPL, st_C_operator
+bool, C_PLPL, st_C_typespec
+long, 0, st_C_typespec
+short, 0, st_C_typespec
+int, 0, st_C_typespec
+char, 0, st_C_typespec
+float, 0, st_C_typespec
+double, 0, st_C_typespec
+signed, 0, st_C_typespec
+unsigned, 0, st_C_typespec
+auto, 0, st_C_typespec
+void, 0, st_C_typespec
+static, 0, st_C_typespec
+const, 0, st_C_typespec
+volatile, 0, st_C_typespec
+explicit, C_PLPL, st_C_typespec
+mutable, C_PLPL, st_C_typespec
+typename, C_PLPL, st_C_typespec
+# DEFUN used in emacs, the next three used in glibc (SYSCALL only for mach).
+DEFUN, 0, st_C_gnumacro
+SYSCALL, 0, st_C_gnumacro
+ENTRY, 0, st_C_gnumacro
+PSEUDO, 0, st_C_gnumacro
+# These are defined inside C functions, so currently they are not met.
+# EXFUN used in glibc, DEFVAR_* in emacs.
+#EXFUN, 0, st_C_gnumacro
+#DEFVAR_, 0, st_C_gnumacro
+%]
+and replace lines between %< and %> with its output. */
+/*%<*/
+/* C code produced by gperf version 2.7.1 (19981006 egcs) */
+/* Command-line: gperf -c -k 1,3 -o -p -r -t */
+struct C_stab_entry { char *name; int c_ext; enum sym_type type; };
+
+#define TOTAL_KEYWORDS 46
+#define MIN_WORD_LENGTH 2
+#define MAX_WORD_LENGTH 15
+#define MIN_HASH_VALUE 13
+#define MAX_HASH_VALUE 123
+/* maximum key range = 111, duplicates = 0 */
+
+#ifdef __GNUC__
+__inline
+#endif
+static unsigned int
+hash (str, len)
+ register const char *str;
+ register unsigned int len;
+{
+ static unsigned char asso_values[] =
+ {
+ 124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+ 124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+ 124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+ 124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+ 124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+ 124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+ 124, 124, 124, 124, 3, 124, 124, 124, 43, 6,
+ 11, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+ 11, 124, 124, 58, 7, 124, 124, 124, 124, 124,
+ 124, 124, 124, 124, 124, 124, 124, 57, 7, 42,
+ 4, 14, 52, 0, 124, 53, 124, 124, 29, 11,
+ 6, 35, 32, 124, 29, 34, 59, 58, 51, 24,
+ 124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+ 124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+ 124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+ 124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+ 124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+ 124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+ 124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+ 124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+ 124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+ 124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+ 124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+ 124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+ 124, 124, 124, 124, 124, 124, 124, 124, 124, 124,
+ 124, 124, 124, 124, 124, 124
+ };
+ register int hval = len;
+
+ switch (hval)
+ {
+ default:
+ case 3:
+ hval += asso_values[(unsigned char)str[2]];
+ case 2:
+ case 1:
+ hval += asso_values[(unsigned char)str[0]];
+ break;
+ }
+ return hval;
+}
+
+#ifdef __GNUC__
+__inline
+#endif
+static struct C_stab_entry *
+in_word_set (str, len)
+ register const char *str;
+ register unsigned int len;
+{
+ static struct C_stab_entry wordlist[] =
+ {
+ {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
+ {""}, {""}, {""}, {""},
+ {"@end", 0, st_C_objend},
+ {""}, {""}, {""}, {""},
+ {"ENTRY", 0, st_C_gnumacro},
+ {"@interface", 0, st_C_objprot},
+ {""},
+ {"domain", C_STAR, st_C_struct},
+ {""},
+ {"PSEUDO", 0, st_C_gnumacro},
+ {""}, {""},
+ {"namespace", C_PLPL, st_C_struct},
+ {""}, {""},
+ {"@implementation",0, st_C_objimpl},
+ {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""}, {""},
+ {"long", 0, st_C_typespec},
+ {"signed", 0, st_C_typespec},
+ {"@protocol", 0, st_C_objprot},
+ {""}, {""}, {""}, {""},
+ {"bool", C_PLPL, st_C_typespec},
+ {""}, {""}, {""}, {""}, {""}, {""},
+ {"const", 0, st_C_typespec},
+ {"explicit", C_PLPL, st_C_typespec},
+ {"if", 0, st_C_ignore},
+ {""},
+ {"operator", C_PLPL, st_C_operator},
+ {""},
+ {"DEFUN", 0, st_C_gnumacro},
+ {""}, {""},
+ {"define", 0, st_C_define},
+ {""}, {""}, {""}, {""}, {""},
+ {"double", 0, st_C_typespec},
+ {"struct", 0, st_C_struct},
+ {""}, {""}, {""}, {""},
+ {"short", 0, st_C_typespec},
+ {""},
+ {"enum", 0, st_C_enum},
+ {"mutable", C_PLPL, st_C_typespec},
+ {""},
+ {"extern", 0, st_C_extern},
+ {"extends", C_JAVA, st_C_javastruct},
+ {"package", C_JAVA, st_C_ignore},
+ {"while", 0, st_C_ignore},
+ {""},
+ {"for", 0, st_C_ignore},
+ {""}, {""}, {""},
+ {"volatile", 0, st_C_typespec},
+ {""}, {""},
+ {"import", C_JAVA, st_C_ignore},
+ {"float", 0, st_C_typespec},
+ {"switch", 0, st_C_ignore},
+ {"return", 0, st_C_ignore},
+ {"implements", C_JAVA, st_C_javastruct},
+ {""},
+ {"static", 0, st_C_typespec},
+ {"typedef", 0, st_C_typedef},
+ {"typename", C_PLPL, st_C_typespec},
+ {"unsigned", 0, st_C_typespec},
+ {""}, {""},
+ {"char", 0, st_C_typespec},
+ {"class", C_PLPL, st_C_struct},
+ {""}, {""}, {""},
+ {"void", 0, st_C_typespec},
+ {""}, {""},
+ {"friend", C_PLPL, st_C_ignore},
+ {""}, {""}, {""},
+ {"int", 0, st_C_typespec},
+ {"union", 0, st_C_struct},
+ {""}, {""}, {""},
+ {"auto", 0, st_C_typespec},
+ {"interface", C_JAVA, st_C_struct},
+ {""},
+ {"SYSCALL", 0, st_C_gnumacro}
+ };
+
+ if (len <= MAX_WORD_LENGTH && len >= MIN_WORD_LENGTH)
+ {
+ register int key = hash (str, len);
+
+ if (key <= MAX_HASH_VALUE && key >= 0)
+ {
+ register const char *s = wordlist[key].name;
+
+ if (*str == *s && !strncmp (str + 1, s + 1, len - 1))
+ return &wordlist[key];
+ }
+ }
+ return 0;
+}
+/*%>*/
+
+static enum sym_type
+C_symtype (str, len, c_ext)
+ char *str;
+ int len;
+ int c_ext;
+{
+ register struct C_stab_entry *se = in_word_set (str, len);
+
+ if (se == NULL || (se->c_ext && !(c_ext & se->c_ext)))
+ return st_none;
+ return se->type;
+}
+\f
+ /*
+ * C functions and variables are recognized using a simple
+ * finite automaton. fvdef is its state variable.
+ */
+enum
+{
+ fvnone, /* nothing seen */
+ foperator, /* func: operator keyword seen (cplpl) */
+ fvnameseen, /* function or variable name seen */
+ fstartlist, /* func: just after open parenthesis */
+ finlist, /* func: in parameter list */
+ flistseen, /* func: after parameter list */
+ fignore, /* func: before open brace */
+ vignore /* var-like: ignore until ';' */
+} fvdef;
+
+bool fvextern; /* func or var: extern keyword seen; */
+
+ /*
+ * typedefs are recognized using a simple finite automaton.
+ * typdef is its state variable.
+ */
+enum
+{
+ tnone, /* nothing seen */
+ tkeyseen, /* typedef keyword seen */
+ ttypeseen, /* defined type seen */
+ tinbody, /* inside typedef body */
+ tend, /* just before typedef tag */
+ tignore /* junk after typedef tag */
+} typdef;
+
+
+ /*
+ * struct-like structures (enum, struct and union) are recognized
+ * using another simple finite automaton. `structdef' is its state
+ * variable.
+ */
+enum
+{
+ snone, /* nothing seen yet */
+ skeyseen, /* struct-like keyword seen */
+ stagseen, /* struct-like tag seen */
+ scolonseen, /* colon seen after struct-like tag */
+ sinbody /* in struct body: recognize member func defs*/
+} structdef;
+
+/*
+ * When structdef is stagseen, scolonseen, or sinbody, structtag is the
+ * struct tag, and structtype is the type of the preceding struct-like
+ * keyword.
+ */
+char *structtag = "<uninited>";
+enum sym_type structtype;
+
+/*
+ * When objdef is different from onone, objtag is the name of the class.
+ */
+char *objtag = "<uninited>";
+
+/*
+ * Yet another little state machine to deal with preprocessor lines.
+ */
+enum
+{
+ dnone, /* nothing seen */
+ dsharpseen, /* '#' seen as first char on line */
+ ddefineseen, /* '#' and 'define' seen */
+ dignorerest /* ignore rest of line */
+} definedef;
+
+/*
+ * State machine for Objective C protocols and implementations.
+ * Tom R.Hageman <tom@basil.icce.rug.nl>
+ */
+enum
+{
+ onone, /* nothing seen */
+ oprotocol, /* @interface or @protocol seen */
+ oimplementation, /* @implementations seen */
+ otagseen, /* class name seen */
+ oparenseen, /* parenthesis before category seen */
+ ocatseen, /* category name seen */
+ oinbody, /* in @implementation body */
+ omethodsign, /* in @implementation body, after +/- */
+ omethodtag, /* after method name */
+ omethodcolon, /* after method colon */
+ omethodparm, /* after method parameter */
+ oignore /* wait for @end */
+} objdef;
+
+
+/*
+ * Use this structure to keep info about the token read, and how it
+ * should be tagged. Used by the make_C_tag function to build a tag.
+ */
+typedef struct
+{
+ bool valid;
+ char *str;
+ bool named;
+ int linelen;
+ int lineno;
+ long linepos;
+ char *buffer;
+} token;
+
+token tok; /* latest token read */
+
+/*
+ * Set this to TRUE, and the next token considered is called a function.
+ * Used only for GNU emacs's function-defining macros.
+ */
+bool next_token_is_func;
+
+/*
+ * TRUE in the rules part of a yacc file, FALSE outside (parse as C).
+ */
+bool yacc_rules;
+
+/*
+ * methodlen is the length of the method name stored in token_name.
+ */
+int methodlen;
+
+static bool consider_token P_((char *, int, int, int, int, int, bool *));
+static void make_C_tag P_((bool));
+
+/*
+ * consider_token ()
+ * checks to see if the current token is at the start of a
+ * function or variable, or corresponds to a typedef, or
+ * is a struct/union/enum tag, or #define, or an enum constant.
+ *
+ * *IS_FUNC gets TRUE iff the token is a function or #define macro
+ * with args. C_EXT is which language we are looking at.
+ *
+ * Globals
+ * fvdef IN OUT
+ * structdef IN OUT
+ * definedef IN OUT
+ * typdef IN OUT
+ * objdef IN OUT
+ * next_token_is_func IN OUT
+ */
+
+static bool
+consider_token (str, len, c, c_ext, cblev, parlev, is_func_or_var)
+ register char *str; /* IN: token pointer */
+ register int len; /* IN: token length */
+ register int c; /* IN: first char after the token */
+ int c_ext; /* IN: C extensions mask */
+ int cblev; /* IN: curly brace level */
+ int parlev; /* IN: parenthesis level */
+ bool *is_func_or_var; /* OUT: function or variable found */
+{
+ enum sym_type toktype = C_symtype (str, len, c_ext);
+
+ /*
+ * Advance the definedef state machine.
+ */
+ switch (definedef)
+ {
+ case dnone:
+ /* We're not on a preprocessor line. */
+ break;
+ case dsharpseen:
+ if (toktype == st_C_define)
+ {
+ definedef = ddefineseen;
+ }
+ else
+ {
+ definedef = dignorerest;
+ }
+ return FALSE;
+ case ddefineseen:
+ /*
+ * Make a tag for any macro, unless it is a constant
+ * and constantypedefs is FALSE.
+ */
+ definedef = dignorerest;
+ *is_func_or_var = (c == '(');
+ if (!*is_func_or_var && !constantypedefs)
+ return FALSE;
+ else
+ return TRUE;
+ case dignorerest:
+ return FALSE;
+ default:
+ error ("internal error: definedef value.", (char *)NULL);
+ }
+
+ /*
+ * Now typedefs
+ */
+ switch (typdef)
+ {
+ case tnone:
+ if (toktype == st_C_typedef)
+ {
+ if (typedefs)
+ typdef = tkeyseen;
+ fvextern = FALSE;
+ fvdef = fvnone;
+ return FALSE;
+ }
+ break;
+ case tkeyseen:
+ switch (toktype)
+ {
+ case st_none:
+ case st_C_typespec:
+ case st_C_struct:
+ case st_C_enum:
+ typdef = ttypeseen;
+ break;
+ }
+ /* Do not return here, so the structdef stuff has a chance. */
+ break;
+ case tend:
+ switch (toktype)
+ {
+ case st_C_typespec:
+ case st_C_struct:
+ case st_C_enum:
+ return FALSE;
+ }
+ return TRUE;
+ }
+
+ /*
+ * This structdef business is currently only invoked when cblev==0.
+ * It should be recursively invoked whatever the curly brace level,
+ * and a stack of states kept, to allow for definitions of structs
+ * within structs.
+ *
+ * This structdef business is NOT invoked when we are ctags and the
+ * file is plain C. This is because a struct tag may have the same
+ * name as another tag, and this loses with ctags.
+ */
+ switch (toktype)
+ {
+ case st_C_javastruct:
+ if (structdef == stagseen)
+ structdef = scolonseen;
+ return FALSE;
+ case st_C_struct:
+ case st_C_enum:
+ if (typdef == tkeyseen
+ || (typedefs_and_cplusplus && cblev == 0 && structdef == snone))
+ {
+ structdef = skeyseen;
+ structtype = toktype;
+ }
+ return FALSE;
+ }
+
+ if (structdef == skeyseen)
+ {
+ /* Save the tag for struct/union/class, for functions and variables
+ that may be defined inside. */
+ if (structtype == st_C_struct)
+ structtag = savenstr (str, len);
+ else
+ structtag = "<enum>";
+ structdef = stagseen;
+ return TRUE;
+ }
+
+ if (typdef != tnone)
+ definedef = dnone;
+
+ /* Detect GNU macros.
+
+ Writers of emacs code are recommended to put the
+ first two args of a DEFUN on the same line.
+
+ The DEFUN macro, used in emacs C source code, has a first arg
+ that is a string (the lisp function name), and a second arg that
+ is a C function name. Since etags skips strings, the second arg
+ is tagged. This is unfortunate, as it would be better to tag the
+ first arg. The simplest way to deal with this problem would be
+ to name the tag with a name built from the function name, by
+ removing the initial 'F' character and substituting '-' for '_'.
+ Anyway, this assumes that the conventions of naming lisp
+ functions will never change. Currently, this method is not
+ implemented. */
+ if (definedef == dnone && toktype == st_C_gnumacro)
+ {
+ next_token_is_func = TRUE;
+ return FALSE;
+ }
+ if (next_token_is_func)
+ {
+ next_token_is_func = FALSE;
+ fvdef = fignore;
+ *is_func_or_var = TRUE;
+ return TRUE;
+ }
+
+ /* Detect Objective C constructs. */
+ switch (objdef)
+ {
+ case onone:
+ switch (toktype)
+ {
+ case st_C_objprot:
+ objdef = oprotocol;
+ return FALSE;
+ case st_C_objimpl:
+ objdef = oimplementation;
+ return FALSE;
+ }
+ break;
+ case oimplementation:
+ /* Save the class tag for functions or variables defined inside. */
+ objtag = savenstr (str, len);
+ objdef = oinbody;
+ return FALSE;
+ case oprotocol:
+ /* Save the class tag for categories. */
+ objtag = savenstr (str, len);
+ objdef = otagseen;
+ *is_func_or_var = TRUE;
+ return TRUE;
+ case oparenseen:
+ objdef = ocatseen;
+ *is_func_or_var = TRUE;
+ return TRUE;
+ case oinbody:
+ break;
+ case omethodsign:
+ if (parlev == 0)
+ {
+ objdef = omethodtag;
+ methodlen = len;
+ grow_linebuffer (&token_name, methodlen + 1);
+ strncpy (token_name.buffer, str, len);
+ token_name.buffer[methodlen] = '\0';
+ token_name.len = methodlen;
+ return TRUE;
+ }
+ return FALSE;
+ case omethodcolon:
+ if (parlev == 0)
+ objdef = omethodparm;
+ return FALSE;
+ case omethodparm:
+ if (parlev == 0)
+ {
+ objdef = omethodtag;
+ methodlen += len;
+ grow_linebuffer (&token_name, methodlen + 1);
+ strncat (token_name.buffer, str, len);
+ token_name.len = methodlen;
+ return TRUE;
+ }
+ return FALSE;
+ case oignore:
+ if (toktype == st_C_objend)
+ {
+ /* Memory leakage here: the string pointed by objtag is
+ never released, because many tests would be needed to
+ avoid breaking on incorrect input code. The amount of
+ memory leaked here is the sum of the lengths of the
+ class tags.
+ free (objtag); */
+ objdef = onone;
+ }
+ return FALSE;
+ }
+
+ /* A function, variable or enum constant? */
+ switch (toktype)
+ {
+ case st_C_extern:
+ fvextern = TRUE;
+ /* FALLTHRU */
+ case st_C_typespec:
+ if (fvdef != finlist && fvdef != fignore && fvdef != vignore)
+ fvdef = fvnone; /* should be useless */
+ return FALSE;
+ case st_C_ignore:
+ fvextern = FALSE;
+ fvdef = vignore;
+ return FALSE;
+ case st_C_operator:
+ fvdef = foperator;
+ *is_func_or_var = TRUE;
+ return TRUE;
+ case st_none:
+ if ((c_ext & C_PLPL) && strneq (str+len-10, "::operator", 10))
+ {
+ fvdef = foperator;
+ *is_func_or_var = TRUE;
+ return TRUE;
+ }
+ if (constantypedefs && structdef == sinbody && structtype == st_C_enum)
+ return TRUE;
+ if (fvdef == fvnone)
+ {
+ fvdef = fvnameseen; /* function or variable */
+ *is_func_or_var = TRUE;
+ return TRUE;
+ }
+ break;
+ }
+
+ return FALSE;
+}
+
+/*
+ * C_entries ()
+ * This routine finds functions, variables, typedefs,
+ * #define's, enum constants and struct/union/enum definitions in
+ * C syntax and adds them to the list.
+ */
+#define current_lb_is_new (newndx == curndx)
+#define switch_line_buffers() (curndx = 1 - curndx)
+
+#define curlb (lbs[curndx].lb)
+#define othlb (lbs[1-curndx].lb)
+#define newlb (lbs[newndx].lb)
+#define curlinepos (lbs[curndx].linepos)
+#define othlinepos (lbs[1-curndx].linepos)
+#define newlinepos (lbs[newndx].linepos)
+
+#define CNL_SAVE_DEFINEDEF() \
+do { \
+ curlinepos = charno; \
+ lineno++; \
+ linecharno = charno; \
+ charno += readline (&curlb, inf); \
+ lp = curlb.buffer; \
+ quotednl = FALSE; \
+ newndx = curndx; \
+} while (0)
+
+#define CNL() \
+do { \
+ CNL_SAVE_DEFINEDEF(); \
+ if (savetok.valid) \
+ { \
+ tok = savetok; \
+ savetok.valid = FALSE; \
+ } \
+ definedef = dnone; \
+} while (0)
+
+
+static void
+make_C_tag (isfun)
+ bool isfun;
+{
+ /* This function should never be called when tok.valid is FALSE, but
+ we must protect against invalid input or internal errors. */
+ if (tok.valid)
+ {
+ if (traditional_tag_style)
+ {
+ /* This was the original code. Now we call new_pfnote instead,
+ which uses the new method for naming tags (see new_pfnote). */
+ char *name = NULL;
+
+ if (CTAGS || tok.named)
+ name = savestr (token_name.buffer);
+ pfnote (name, isfun,
+ tok.buffer, tok.linelen, tok.lineno, tok.linepos);
+ }
+ else
+ new_pfnote (token_name.buffer, token_name.len, isfun,
+ tok.buffer, tok.linelen, tok.lineno, tok.linepos);
+ tok.valid = FALSE;
+ }
+ else if (DEBUG)
+ abort ();
+}
+
+
+static void
+C_entries (c_ext, inf)
+ int c_ext; /* extension of C */
+ FILE *inf; /* input file */
+{
+ register char c; /* latest char read; '\0' for end of line */
+ register char *lp; /* pointer one beyond the character `c' */
+ int curndx, newndx; /* indices for current and new lb */
+ register int tokoff; /* offset in line of start of current token */
+ register int toklen; /* length of current token */
+ char *qualifier; /* string used to qualify names */
+ int qlen; /* length of qualifier */
+ int cblev; /* current curly brace level */
+ int parlev; /* current parenthesis level */
+ bool incomm, inquote, inchar, quotednl, midtoken;
+ bool purec, cplpl, cjava;
+ token savetok; /* token saved during preprocessor handling */
+
+
+ tokoff = toklen = 0; /* keep compiler quiet */
+ curndx = newndx = 0;
+ lineno = 0;
+ charno = 0;
+ lp = curlb.buffer;
+ *lp = 0;
+
+ fvdef = fvnone; fvextern = FALSE; typdef = tnone;
+ structdef = snone; definedef = dnone; objdef = onone;
+ next_token_is_func = yacc_rules = FALSE;
+ midtoken = inquote = inchar = incomm = quotednl = FALSE;
+ tok.valid = savetok.valid = FALSE;
+ cblev = 0;
+ parlev = 0;
+ purec = !(c_ext & ~YACC); /* no extensions (apart from possibly yacc) */
+ cplpl = (c_ext & C_PLPL) == C_PLPL;
+ cjava = (c_ext & C_JAVA) == C_JAVA;
+ if (cjava)
+ { qualifier = "."; qlen = 1; }
+ else
+ { qualifier = "::"; qlen = 2; }
+
+ while (!feof (inf))
+ {
+ c = *lp++;
+ if (c == '\\')
+ {
+ /* If we're at the end of the line, the next character is a
+ '\0'; don't skip it, because it's the thing that tells us
+ to read the next line. */
+ if (*lp == '\0')
+ {
+ quotednl = TRUE;
+ continue;
+ }
+ lp++;
+ c = ' ';
+ }
+ else if (incomm)
+ {
+ switch (c)
+ {
+ case '*':
+ if (*lp == '/')
+ {
+ c = *lp++;
+ incomm = FALSE;
+ }
+ break;
+ case '\0':
+ /* Newlines inside comments do not end macro definitions in
+ traditional cpp. */
+ CNL_SAVE_DEFINEDEF ();
+ break;
+ }
+ continue;
+ }
+ else if (inquote)
+ {
+ switch (c)
+ {
+ case '"':
+ inquote = FALSE;
+ break;
+ case '\0':
+ /* Newlines inside strings do not end macro definitions
+ in traditional cpp, even though compilers don't
+ usually accept them. */
+ CNL_SAVE_DEFINEDEF ();
+ break;
+ }
+ continue;
+ }
+ else if (inchar)
+ {
+ switch (c)
+ {
+ case '\0':
+ /* Hmmm, something went wrong. */
+ CNL ();
+ /* FALLTHRU */
+ case '\'':
+ inchar = FALSE;
+ break;
+ }
+ continue;
+ }
+ else
+ switch (c)
+ {
+ case '"':
+ inquote = TRUE;
+ if (fvdef != finlist && fvdef != fignore && fvdef !=vignore)
+ {
+ fvextern = FALSE;
+ fvdef = fvnone;
+ }
+ continue;
+ case '\'':
+ inchar = TRUE;
+ if (fvdef != finlist && fvdef != fignore && fvdef !=vignore)
+ {
+ fvextern = FALSE;
+ fvdef = fvnone;
+ }
+ continue;
+ case '/':
+ if (*lp == '*')
+ {
+ lp++;
+ incomm = TRUE;
+ continue;
+ }
+ else if (/* cplpl && */ *lp == '/')
+ {
+ c = '\0';
+ break;
+ }
+ else
+ break;
+ case '%':
+ if ((c_ext & YACC) && *lp == '%')
+ {
+ /* entering or exiting rules section in yacc file */
+ lp++;
+ definedef = dnone; fvdef = fvnone; fvextern = FALSE;
+ typdef = tnone; structdef = snone;
+ next_token_is_func = FALSE;
+ midtoken = inquote = inchar = incomm = quotednl = FALSE;
+ cblev = 0;
+ yacc_rules = !yacc_rules;
+ continue;
+ }
+ else
+ break;
+ case '#':
+ if (definedef == dnone)
+ {
+ char *cp;
+ bool cpptoken = TRUE;
+
+ /* Look back on this line. If all blanks, or nonblanks
+ followed by an end of comment, this is a preprocessor
+ token. */
+ for (cp = newlb.buffer; cp < lp-1; cp++)
+ if (!iswhite (*cp))
+ {
+ if (*cp == '*' && *(cp+1) == '/')
+ {
+ cp++;
+ cpptoken = TRUE;
+ }
+ else
+ cpptoken = FALSE;
+ }
+ if (cpptoken)
+ definedef = dsharpseen;
+ } /* if (definedef == dnone) */
+
+ continue;
+ } /* switch (c) */
+
+
+ /* Consider token only if some complicated conditions are satisfied. */
+ if ((definedef != dnone
+ || (cblev == 0 && structdef != scolonseen)
+ || (cblev == 1 && cplpl && structdef == sinbody)
+ || (structdef == sinbody && purec))
+ && typdef != tignore
+ && definedef != dignorerest
+ && fvdef != finlist)
+ {
+ if (midtoken)
+ {
+ if (endtoken (c))
+ {
+ bool funorvar = FALSE;
+
+ if (c == ':' && cplpl && *lp == ':' && begtoken (lp[1]))
+ {
+ /*
+ * This handles :: in the middle, but not at the
+ * beginning of an identifier. Also, space-separated
+ * :: is not recognised.
+ */
+ lp += 2;
+ toklen += 2;
+ c = lp[-1];
+ goto intok;
+ }
+ else
+ {
+ if (yacc_rules
+ || consider_token (newlb.buffer + tokoff, toklen, c,
+ c_ext, cblev, parlev, &funorvar))
+ {
+ if (fvdef == foperator)
+ {
+ char *oldlp = lp;
+ lp = skip_spaces (lp-1);
+ if (*lp != '\0')
+ lp += 1;
+ while (*lp != '\0'
+ && !iswhite (*lp) && *lp != '(')
+ lp += 1;
+ c = *lp++;
+ toklen += lp - oldlp;
+ }
+ tok.named = FALSE;
+ if (!purec
+ && funorvar
+ && definedef == dnone
+ && structdef == sinbody)
+ /* function or var defined in C++ class body */
+ {
+ int len = strlen (structtag) + qlen + toklen;
+ grow_linebuffer (&token_name, len + 1);
+ strcpy (token_name.buffer, structtag);
+ strcat (token_name.buffer, qualifier);
+ strncat (token_name.buffer,
+ newlb.buffer + tokoff, toklen);
+ token_name.len = len;
+ tok.named = TRUE;
+ }
+ else if (objdef == ocatseen)
+ /* Objective C category */
+ {
+ int len = strlen (objtag) + 2 + toklen;
+ grow_linebuffer (&token_name, len + 1);
+ strcpy (token_name.buffer, objtag);
+ strcat (token_name.buffer, "(");
+ strncat (token_name.buffer,
+ newlb.buffer + tokoff, toklen);
+ strcat (token_name.buffer, ")");
+ token_name.len = len;
+ tok.named = TRUE;
+ }
+ else if (objdef == omethodtag
+ || objdef == omethodparm)
+ /* Objective C method */
+ {
+ tok.named = TRUE;
+ }
+ else
+ {
+ grow_linebuffer (&token_name, toklen + 1);
+ strncpy (token_name.buffer,
+ newlb.buffer + tokoff, toklen);
+ token_name.buffer[toklen] = '\0';
+ token_name.len = toklen;
+ /* Name macros and members. */
+ tok.named = (structdef == stagseen
+ || typdef == ttypeseen
+ || typdef == tend
+ || (funorvar
+ && definedef == dignorerest)
+ || (funorvar
+ && definedef == dnone
+ && structdef == sinbody));
+ }
+ tok.lineno = lineno;
+ tok.linelen = tokoff + toklen + 1;
+ tok.buffer = newlb.buffer;
+ tok.linepos = newlinepos;
+ tok.valid = TRUE;
+
+ if (definedef == dnone
+ && (fvdef == fvnameseen
+ || fvdef == foperator
+ || structdef == stagseen
+ || typdef == tend
+ || objdef != onone))
+ {
+ if (current_lb_is_new)
+ switch_line_buffers ();
+ }
+ else
+ make_C_tag (funorvar);
+ }
+ midtoken = FALSE;
+ }
+ } /* if (endtoken (c)) */
+ else if (intoken (c))
+ intok:
+ {
+ toklen++;
+ continue;
+ }
+ } /* if (midtoken) */
+ else if (begtoken (c))
+ {
+ switch (definedef)
+ {
+ case dnone:
+ switch (fvdef)
+ {
+ case fstartlist:
+ fvdef = finlist;
+ continue;
+ case flistseen:
+ make_C_tag (TRUE); /* a function */
+ fvdef = fignore;
+ break;
+ case fvnameseen:
+ fvdef = fvnone;
+ break;
+ }
+ if (structdef == stagseen && !cjava)
+ structdef = snone;
+ break;
+ case dsharpseen:
+ savetok = tok;
+ }
+ if (!yacc_rules || lp == newlb.buffer + 1)
+ {
+ tokoff = lp - 1 - newlb.buffer;
+ toklen = 1;
+ midtoken = TRUE;
+ }
+ continue;
+ } /* if (begtoken) */
+ } /* if must look at token */
+
+
+ /* Detect end of line, colon, comma, semicolon and various braces
+ after having handled a token.*/
+ switch (c)
+ {
+ case ':':
+ if (definedef != dnone)
+ break;
+ switch (objdef)
+ {
+ case otagseen:
+ objdef = oignore;
+ make_C_tag (TRUE); /* an Objective C class */
+ break;
+ case omethodtag:
+ case omethodparm:
+ objdef = omethodcolon;
+ methodlen += 1;
+ grow_linebuffer (&token_name, methodlen + 1);
+ strcat (token_name.buffer, ":");
+ token_name.len = methodlen;
+ break;
+ }
+ if (structdef == stagseen)
+ structdef = scolonseen;
+ else
+ switch (fvdef)
+ {
+ case fvnameseen:
+ if (yacc_rules)
+ {
+ make_C_tag (FALSE); /* a yacc function */
+ fvdef = fignore;
+ }
+ break;
+ case fstartlist:
+ fvextern = FALSE;
+ fvdef = fvnone;
+ break;
+ }
+ break;
+ case ';':
+ if (definedef != dnone)
+ break;
+ if (cblev == 0)
+ switch (typdef)
+ {
+ case tend:
+ make_C_tag (FALSE); /* a typedef */
+ /* FALLTHRU */
+ default:
+ typdef = tnone;
+ }
+ switch (fvdef)
+ {
+ case fignore:
+ break;
+ case fvnameseen:
+ if ((members && cblev == 1)
+ || (globals && cblev == 0 && (!fvextern || declarations)))
+ make_C_tag (FALSE); /* a variable */
+ fvextern = FALSE;
+ fvdef = fvnone;
+ tok.valid = FALSE;
+ break;
+ case flistseen:
+ if (declarations && (cblev == 0 || cblev == 1))
+ make_C_tag (TRUE); /* a function declaration */
+ /* FALLTHRU */
+ default:
+ fvextern = FALSE;
+ fvdef = fvnone;
+ /* The following instruction invalidates the token.
+ Probably the token should be invalidated in all
+ other cases where some state machine is reset. */
+ tok.valid = FALSE;
+ }
+ if (structdef == stagseen)
+ structdef = snone;
+ break;
+ case ',':
+ if (definedef != dnone)
+ break;
+ switch (objdef)
+ {
+ case omethodtag:
+ case omethodparm:
+ make_C_tag (TRUE); /* an Objective C method */
+ objdef = oinbody;
+ break;
+ }
+ switch (fvdef)
+ {
+ case foperator:
+ case finlist:
+ case fignore:
+ case vignore:
+ break;
+ case fvnameseen:
+ if ((members && cblev == 1)
+ || (globals && cblev == 0 && (!fvextern || declarations)))
+ make_C_tag (FALSE); /* a variable */
+ break;
+ default:
+ fvdef = fvnone;
+ }
+ if (structdef == stagseen)
+ structdef = snone;
+ break;
+ case '[':
+ if (definedef != dnone)
+ break;
+ if (cblev == 0 && typdef == tend)
+ {
+ typdef = tignore;
+ make_C_tag (FALSE); /* a typedef */
+ break;
+ }
+ switch (fvdef)
+ {
+ case foperator:
+ case finlist:
+ case fignore:
+ case vignore:
+ break;
+ case fvnameseen:
+ if ((members && cblev == 1)
+ || (globals && cblev == 0 && (!fvextern || declarations)))
+ make_C_tag (FALSE); /* a variable */
+ /* FALLTHRU */
+ default:
+ fvdef = fvnone;
+ }
+ if (structdef == stagseen)
+ structdef = snone;
+ break;
+ case '(':
+ if (definedef != dnone)
+ break;
+ if (objdef == otagseen && parlev == 0)
+ objdef = oparenseen;
+ switch (fvdef)
+ {
+ case fvnameseen:
+ if (typdef == ttypeseen
+ && tok.valid
+ && *lp != '*'
+ && structdef != sinbody)
+ {
+ /* This handles constructs like:
+ typedef void OperatorFun (int fun); */
+ make_C_tag (FALSE);
+ typdef = tignore;
+ }
+ /* FALLTHRU */
+ case foperator:
+ fvdef = fstartlist;
+ break;
+ case flistseen:
+ fvdef = finlist;
+ break;
+ }
+ parlev++;
+ break;
+ case ')':
+ if (definedef != dnone)
+ break;
+ if (objdef == ocatseen && parlev == 1)
+ {
+ make_C_tag (TRUE); /* an Objective C category */
+ objdef = oignore;
+ }
+ if (--parlev == 0)
+ {
+ switch (fvdef)
+ {
+ case fstartlist:
+ case finlist:
+ fvdef = flistseen;
+ break;
+ }
+ if (cblev == 0 && (typdef == tend))
+ {
+ typdef = tignore;
+ make_C_tag (FALSE); /* a typedef */
+ }
+ }
+ else if (parlev < 0) /* can happen due to ill-conceived #if's. */
+ parlev = 0;
+ break;
+ case '{':
+ if (definedef != dnone)
+ break;
+ if (typdef == ttypeseen)
+ typdef = tinbody;
+ switch (structdef)
+ {
+ case skeyseen: /* unnamed struct */
+ structdef = sinbody;
+ structtag = "_anonymous_";
+ break;
+ case stagseen:
+ case scolonseen: /* named struct */
+ structdef = sinbody;
+ make_C_tag (FALSE); /* a struct */
+ break;
+ }
+ switch (fvdef)
+ {
+ case flistseen:
+ make_C_tag (TRUE); /* a function */
+ /* FALLTHRU */
+ case fignore:
+ fvdef = fvnone;
+ break;
+ case fvnone:
+ switch (objdef)
+ {
+ case otagseen:
+ make_C_tag (TRUE); /* an Objective C class */
+ objdef = oignore;
+ break;
+ case omethodtag:
+ case omethodparm:
+ make_C_tag (TRUE); /* an Objective C method */
+ objdef = oinbody;
+ break;
+ default:
+ /* Neutralize `extern "C" {' grot. */
+ if (cblev == 0 && structdef == snone && typdef == tnone)
+ cblev = -1;
+ }
+ }
+ cblev++;
+ break;
+ case '*':
+ if (definedef != dnone)
+ break;
+ if (fvdef == fstartlist)
+ fvdef = fvnone; /* avoid tagging `foo' in `foo (*bar()) ()' */
+ break;
+ case '}':
+ if (definedef != dnone)
+ break;
+ if (!noindentypedefs && lp == newlb.buffer + 1)
+ {
+ cblev = 0; /* reset curly brace level if first column */
+ parlev = 0; /* also reset paren level, just in case... */
+ }
+ else if (cblev > 0)
+ cblev--;
+ if (cblev == 0)
+ {
+ if (typdef == tinbody)
+ typdef = tend;
+ /* Memory leakage here: the string pointed by structtag is
+ never released, because I fear to miss something and
+ break things while freeing the area. The amount of
+ memory leaked here is the sum of the lengths of the
+ struct tags.
+ if (structdef == sinbody)
+ free (structtag); */
+
+ structdef = snone;
+ structtag = "<error>";
+ }
+ break;
+ case '=':
+ if (definedef != dnone)
+ break;
+ switch (fvdef)
+ {
+ case foperator:
+ case finlist:
+ case fignore:
+ case vignore:
+ break;
+ case fvnameseen:
+ if ((members && cblev == 1)
+ || (globals && cblev == 0 && (!fvextern || declarations)))
+ make_C_tag (FALSE); /* a variable */
+ /* FALLTHRU */
+ default:
+ fvdef = vignore;
+ }
+ break;
+ case '+':
+ case '-':
+ if (objdef == oinbody && cblev == 0)
+ {
+ objdef = omethodsign;
+ break;
+ }
+ /* FALLTHRU */
+ case '#': case '~': case '&': case '%': case '/': case '|':
+ case '^': case '!': case '<': case '>': case '.': case '?': case ']':
+ if (definedef != dnone)
+ break;
+ /* These surely cannot follow a function tag in C. */
+ switch (fvdef)
+ {
+ case foperator:
+ case finlist:
+ case fignore:
+ case vignore:
+ break;
+ default:
+ fvdef = fvnone;
+ }
+ break;
+ case '\0':
+ if (objdef == otagseen)
+ {
+ make_C_tag (TRUE); /* an Objective C class */
+ objdef = oignore;
+ }
+ /* If a macro spans multiple lines don't reset its state. */
+ if (quotednl)
+ CNL_SAVE_DEFINEDEF ();
+ else
+ CNL ();
+ break;
+ } /* switch (c) */
+
+ } /* while not eof */
+}
+
+/*
+ * Process either a C++ file or a C file depending on the setting
+ * of a global flag.
+ */
+static void
+default_C_entries (inf)
+ FILE *inf;
+{
+ C_entries (cplusplus ? C_PLPL : 0, inf);
+}
+
+/* Always do plain ANSI C. */
+static void
+plain_C_entries (inf)
+ FILE *inf;
+{
+ C_entries (0, inf);
+}
+
+/* Always do C++. */
+static void
+Cplusplus_entries (inf)
+ FILE *inf;
+{
+ C_entries (C_PLPL, inf);
+}
+
+/* Always do Java. */
+static void
+Cjava_entries (inf)
+ FILE *inf;
+{
+ C_entries (C_JAVA, inf);
+}
+
+/* Always do C*. */
+static void
+Cstar_entries (inf)
+ FILE *inf;
+{
+ C_entries (C_STAR, inf);
+}
+
+/* Always do Yacc. */
+static void
+Yacc_entries (inf)
+ FILE *inf;
+{
+ C_entries (YACC, inf);
+}
+\f
+/* A useful macro. */
+#define LOOP_ON_INPUT_LINES(file_pointer, line_buffer, char_pointer) \
+ for (lineno = charno = 0; /* loop initialization */ \
+ !feof (file_pointer) /* loop test */ \
+ && (lineno++, /* instructions at start of loop */ \
+ linecharno = charno, \
+ charno += readline (&line_buffer, file_pointer), \
+ char_pointer = lb.buffer, \
+ TRUE); \
+ )
+
+
+/*
+ * Read a file, but do no processing. This is used to do regexp
+ * matching on files that have no language defined.
+ */
+static void
+just_read_file (inf)
+ FILE *inf;
+{
+ register char *dummy;
+
+ LOOP_ON_INPUT_LINES (inf, lb, dummy)
+ continue;
+}
+\f
+/* Fortran parsing */
+
+static bool tail P_((char *));
+static void takeprec P_((void));
+static void getit P_((FILE *));
+
+static bool
+tail (cp)
+ char *cp;
+{
+ register int len = 0;
+
+ while (*cp != '\0' && lowcase (*cp) == lowcase (dbp[len]))
+ cp++, len++;
+ if (*cp == '\0' && !intoken (dbp[len]))
+ {
+ dbp += len;
+ return TRUE;
+ }
+ return FALSE;
+}
+
+static void
+takeprec ()
+{
+ dbp = skip_spaces (dbp);
+ if (*dbp != '*')
+ return;
+ dbp++;
+ dbp = skip_spaces (dbp);
+ if (strneq (dbp, "(*)", 3))
+ {
+ dbp += 3;
+ return;
+ }
+ if (!isdigit (*dbp))
+ {
+ --dbp; /* force failure */
+ return;
+ }
+ do
+ dbp++;
+ while (isdigit (*dbp));
+}
+
+static void
+getit (inf)
+ FILE *inf;
+{
+ register char *cp;
+
+ dbp = skip_spaces (dbp);
+ if (*dbp == '\0')
+ {
+ lineno++;
+ linecharno = charno;
+ charno += readline (&lb, inf);
+ dbp = lb.buffer;
+ if (dbp[5] != '&')
+ return;
+ dbp += 6;
+ dbp = skip_spaces (dbp);
+ }
+ if (!isalpha (*dbp) && *dbp != '_' && *dbp != '$')
+ return;
+ for (cp = dbp + 1; *cp != '\0' && intoken (*cp); cp++)
+ continue;
+ pfnote (savenstr (dbp, cp-dbp), TRUE,
+ lb.buffer, cp - lb.buffer + 1, lineno, linecharno);
+}
+
+
+static void
+Fortran_functions (inf)
+ FILE *inf;
+{
+ LOOP_ON_INPUT_LINES (inf, lb, dbp)
+ {
+ if (*dbp == '%')
+ dbp++; /* Ratfor escape to fortran */
+ dbp = skip_spaces (dbp);
+ if (*dbp == '\0')
+ continue;
+ switch (lowcase (*dbp))
+ {
+ case 'i':
+ if (tail ("integer"))
+ takeprec ();
+ break;
+ case 'r':
+ if (tail ("real"))
+ takeprec ();
+ break;
+ case 'l':
+ if (tail ("logical"))
+ takeprec ();
+ break;
+ case 'c':
+ if (tail ("complex") || tail ("character"))
+ takeprec ();
+ break;
+ case 'd':
+ if (tail ("double"))
+ {
+ dbp = skip_spaces (dbp);
+ if (*dbp == '\0')
+ continue;
+ if (tail ("precision"))
+ break;
+ continue;
+ }
+ break;
+ }
+ dbp = skip_spaces (dbp);
+ if (*dbp == '\0')
+ continue;
+ switch (lowcase (*dbp))
+ {
+ case 'f':
+ if (tail ("function"))
+ getit (inf);
+ continue;
+ case 's':
+ if (tail ("subroutine"))
+ getit (inf);
+ continue;
+ case 'e':
+ if (tail ("entry"))
+ getit (inf);
+ continue;
+ case 'b':
+ if (tail ("blockdata") || tail ("block data"))
+ {
+ dbp = skip_spaces (dbp);
+ if (*dbp == '\0') /* assume un-named */
+ pfnote (savestr ("blockdata"), TRUE,
+ lb.buffer, dbp - lb.buffer, lineno, linecharno);
+ else
+ getit (inf); /* look for name */
+ }
+ continue;
+ }
+ }
+}
+\f
+/*
+ * Philippe Waroquiers <philippe.waroquiers@eurocontrol.be>, 1998-04-24
+ * Ada parsing
+ */
+
+static void adagetit P_((FILE *, char *));
+
+/* Once we are positioned after an "interesting" keyword, let's get
+ the real tag value necessary. */
+static void
+adagetit (inf, name_qualifier)
+ FILE *inf;
+ char *name_qualifier;
+{
+ register char *cp;
+ char *name;
+ char c;
+
+ while (!feof (inf))
+ {
+ dbp = skip_spaces (dbp);
+ if (*dbp == '\0'
+ || (dbp[0] == '-' && dbp[1] == '-'))
+ {
+ lineno++;
+ linecharno = charno;
+ charno += readline (&lb, inf);
+ dbp = lb.buffer;
+ }
+ switch (*dbp)
+ {
+ case 'b':
+ case 'B':
+ if (tail ("body"))
+ {
+ /* Skipping body of procedure body or package body or ....
+ resetting qualifier to body instead of spec. */
+ name_qualifier = "/b";
+ continue;
+ }
+ break;
+ case 't':
+ case 'T':
+ /* Skipping type of task type or protected type ... */
+ if (tail ("type"))
+ continue;
+ break;
+ }
+ if (*dbp == '"')
+ {
+ dbp += 1;
+ for (cp = dbp; *cp != '\0' && *cp != '"'; cp++)
+ continue;
+ }
+ else
+ {
+ dbp = skip_spaces (dbp);
+ for (cp = dbp;
+ (*cp != '\0'
+ && (isalpha (*cp) || isdigit (*cp) || *cp == '_' || *cp == '.'));
+ cp++)
+ continue;
+ if (cp == dbp)
+ return;
+ }
+ c = *cp;
+ *cp = '\0';
+ name = concat (dbp, name_qualifier, "");
+ *cp = c;
+ pfnote (name, TRUE, lb.buffer, cp - lb.buffer + 1, lineno, linecharno);
+ if (c == '"')
+ dbp = cp + 1;
+ return;
+ }
+}
+
+static void
+Ada_funcs (inf)
+ FILE *inf;
+{
+ bool inquote = FALSE;
+
+ LOOP_ON_INPUT_LINES (inf, lb, dbp)
+ {
+ while (*dbp != '\0')
+ {
+ /* Skip a string i.e. "abcd". */
+ if (inquote || (*dbp == '"'))
+ {
+ dbp = etags_strchr ((inquote) ? dbp : dbp+1, '"');
+ if (dbp != NULL)
+ {
+ inquote = FALSE;
+ dbp += 1;
+ continue; /* advance char */
+ }
+ else
+ {
+ inquote = TRUE;
+ break; /* advance line */
+ }
+ }
+
+ /* Skip comments. */
+ if (dbp[0] == '-' && dbp[1] == '-')
+ break; /* advance line */
+
+ /* Skip character enclosed in single quote i.e. 'a'
+ and skip single quote starting an attribute i.e. 'Image. */
+ if (*dbp == '\'')
+ {
+ dbp++ ;
+ if (*dbp != '\0')
+ dbp++;
+ continue;
+ }
+
+ /* Search for beginning of a token. */
+ if (!begtoken (*dbp))
+ {
+ dbp++;
+ continue; /* advance char */
+ }
+
+ /* We are at the beginning of a token. */
+ switch (*dbp)
+ {
+ case 'f':
+ case 'F':
+ if (!packages_only && tail ("function"))
+ adagetit (inf, "/f");
+ else
+ break; /* from switch */
+ continue; /* advance char */
+ case 'p':
+ case 'P':
+ if (!packages_only && tail ("procedure"))
+ adagetit (inf, "/p");
+ else if (tail ("package"))
+ adagetit (inf, "/s");
+ else if (tail ("protected")) /* protected type */
+ adagetit (inf, "/t");
+ else
+ break; /* from switch */
+ continue; /* advance char */
+ case 't':
+ case 'T':
+ if (!packages_only && tail ("task"))
+ adagetit (inf, "/k");
+ else if (typedefs && !packages_only && tail ("type"))
+ {
+ adagetit (inf, "/t");
+ while (*dbp != '\0')
+ dbp += 1;
+ }
+ else
+ break; /* from switch */
+ continue; /* advance char */
+ }
+
+ /* Look for the end of the token. */
+ while (!endtoken (*dbp))
+ dbp++;
+
+ } /* advance char */
+ } /* advance line */
+}
+\f
+/*
+ * Bob Weiner, Motorola Inc., 4/3/94
+ * Unix and microcontroller assembly tag handling
+ * look for '^[a-zA-Z_.$][a-zA_Z0-9_.$]*[: ^I^J]'
+ */
+static void
+Asm_labels (inf)
+ FILE *inf;
+{
+ register char *cp;
+
+ LOOP_ON_INPUT_LINES (inf, lb, cp)
+ {
+ /* If first char is alphabetic or one of [_.$], test for colon
+ following identifier. */
+ if (isalpha (*cp) || *cp == '_' || *cp == '.' || *cp == '$')
+ {
+ /* Read past label. */
+ cp++;
+ while (isalnum (*cp) || *cp == '_' || *cp == '.' || *cp == '$')
+ cp++;
+ if (*cp == ':' || iswhite (*cp))
+ {
+ /* Found end of label, so copy it and add it to the table. */
+ pfnote (savenstr(lb.buffer, cp-lb.buffer), TRUE,
+ lb.buffer, cp - lb.buffer + 1, lineno, linecharno);
+ }
+ }
+ }
+}
+\f
+/*
+ * Perl support by Bart Robinson <lomew@cs.utah.edu>
+ * enhanced by Michael Ernst <mernst@alum.mit.edu>
+ * Perl sub names: look for /^sub[ \t\n]+[^ \t\n{]+/
+ * Perl variable names: /^(my|local).../
+ */
+static void
+Perl_functions (inf)
+ FILE *inf;
+{
+ register char *cp;
+
+ LOOP_ON_INPUT_LINES (inf, lb, cp)
+ {
+ if (*cp++ == 's'
+ && *cp++ == 'u'
+ && *cp++ == 'b' && iswhite (*cp++))
+ {
+ cp = skip_spaces (cp);
+ if (*cp != '\0')
+ {
+ char *sp = cp;
+ while (*cp != '\0'
+ && !iswhite (*cp) && *cp != '{' && *cp != '(')
+ cp++;
+ pfnote (savenstr (sp, cp-sp), TRUE,
+ lb.buffer, cp - lb.buffer + 1, lineno, linecharno);
+ }
+ }
+ else if (globals /* only if tagging global vars is enabled */
+ && ((cp = lb.buffer,
+ *cp++ == 'm'
+ && *cp++ == 'y')
+ || (cp = lb.buffer,
+ *cp++ == 'l'
+ && *cp++ == 'o'
+ && *cp++ == 'c'
+ && *cp++ == 'a'
+ && *cp++ == 'l'))
+ && (*cp == '(' || iswhite (*cp)))
+ {
+ /* After "my" or "local", but before any following paren or space. */
+ char *varname = NULL;
+
+ cp = skip_spaces (cp);
+ if (*cp == '$' || *cp == '@' || *cp == '%')
+ {
+ char* varstart = ++cp;
+ while (isalnum (*cp) || *cp == '_')
+ cp++;
+ varname = savenstr (varstart, cp-varstart);
+ }
+ else
+ {
+ /* Should be examining a variable list at this point;
+ could insist on seeing an open parenthesis. */
+ while (*cp != '\0' && *cp != ';' && *cp != '=' && *cp != ')')
+ cp++;
+ }
+
+ /* Perhaps I should back cp up one character, so the TAGS table
+ doesn't mention (and so depend upon) the following char. */
+ pfnote ((CTAGS) ? savenstr (lb.buffer, cp-lb.buffer) : varname,
+ FALSE, lb.buffer, cp - lb.buffer + 1, lineno, linecharno);
+ }
+ }
+}
+\f
+/*
+ * Python support by Eric S. Raymond <esr@thyrsus.com>
+ * Look for /^def[ \t\n]+[^ \t\n(:]+/ or /^class[ \t\n]+[^ \t\n(:]+/
+ */
+static void
+Python_functions (inf)
+ FILE *inf;
+{
+ register char *cp;
+
+ LOOP_ON_INPUT_LINES (inf, lb, cp)
+ {
+ if (*cp++ == 'd'
+ && *cp++ == 'e'
+ && *cp++ == 'f' && iswhite (*cp++))
+ {
+ cp = skip_spaces (cp);
+ while (*cp != '\0' && !iswhite (*cp) && *cp != '(' && *cp != ':')
+ cp++;
+ pfnote (NULL, TRUE,
+ lb.buffer, cp - lb.buffer + 1, lineno, linecharno);
+ }
+
+ cp = lb.buffer;
+ if (*cp++ == 'c'
+ && *cp++ == 'l'
+ && *cp++ == 'a'
+ && *cp++ == 's'
+ && *cp++ == 's' && iswhite (*cp++))
+ {
+ cp = skip_spaces (cp);
+ while (*cp != '\0' && !iswhite (*cp) && *cp != '(' && *cp != ':')
+ cp++;
+ pfnote (NULL, TRUE,
+ lb.buffer, cp - lb.buffer + 1, lineno, linecharno);
+ }
+ }
+}
+\f
+/* Idea by Corny de Souza
+ * Cobol tag functions
+ * We could look for anything that could be a paragraph name.
+ * i.e. anything that starts in column 8 is one word and ends in a full stop.
+ */
+static void
+Cobol_paragraphs (inf)
+ FILE *inf;
+{
+ register char *bp, *ep;
+
+ LOOP_ON_INPUT_LINES (inf, lb, bp)
+ {
+ if (lb.len < 9)
+ continue;
+ bp += 8;
+
+ /* If eoln, compiler option or comment ignore whole line. */
+ if (bp[-1] != ' ' || !isalnum (bp[0]))
+ continue;
+
+ for (ep = bp; isalnum (*ep) || *ep == '-'; ep++)
+ continue;
+ if (*ep++ == '.')
+ pfnote (savenstr (bp, ep-bp), TRUE,
+ lb.buffer, ep - lb.buffer + 1, lineno, linecharno);
+ }
+}
+\f
+/* Added by Mosur Mohan, 4/22/88 */
+/* Pascal parsing */
+
+/*
+ * Locates tags for procedures & functions. Doesn't do any type- or
+ * var-definitions. It does look for the keyword "extern" or
+ * "forward" immediately following the procedure statement; if found,
+ * the tag is skipped.
+ */
+static void
+Pascal_functions (inf)
+ FILE *inf;
+{
+ linebuffer tline; /* mostly copied from C_entries */
+ long save_lcno;
+ int save_lineno, save_len;
+ char c, *cp, *namebuf;
+
+ bool /* each of these flags is TRUE iff: */
+ incomment, /* point is inside a comment */
+ inquote, /* point is inside '..' string */
+ get_tagname, /* point is after PROCEDURE/FUNCTION
+ keyword, so next item = potential tag */
+ found_tag, /* point is after a potential tag */
+ inparms, /* point is within parameter-list */
+ verify_tag; /* point has passed the parm-list, so the
+ next token will determine whether this
+ is a FORWARD/EXTERN to be ignored, or
+ whether it is a real tag */
+
+ save_lcno = save_lineno = save_len = 0; /* keep compiler quiet */
+ namebuf = NULL; /* keep compiler quiet */
+ lineno = 0;
+ charno = 0;
+ dbp = lb.buffer;
+ *dbp = '\0';
+ initbuffer (&tline);
+
+ incomment = inquote = FALSE;
+ found_tag = FALSE; /* have a proc name; check if extern */
+ get_tagname = FALSE; /* have found "procedure" keyword */
+ inparms = FALSE; /* found '(' after "proc" */
+ verify_tag = FALSE; /* check if "extern" is ahead */
+
+
+ while (!feof (inf)) /* long main loop to get next char */
+ {
+ c = *dbp++;
+ if (c == '\0') /* if end of line */
+ {
+ lineno++;
+ linecharno = charno;
+ charno += readline (&lb, inf);
+ dbp = lb.buffer;
+ if (*dbp == '\0')
+ continue;
+ if (!((found_tag && verify_tag)
+ || get_tagname))
+ c = *dbp++; /* only if don't need *dbp pointing
+ to the beginning of the name of
+ the procedure or function */
+ }
+ if (incomment)
+ {
+ if (c == '}') /* within { } comments */
+ incomment = FALSE;
+ else if (c == '*' && *dbp == ')') /* within (* *) comments */
+ {
+ dbp++;
+ incomment = FALSE;
+ }
+ continue;
+ }
+ else if (inquote)
+ {
+ if (c == '\'')
+ inquote = FALSE;
+ continue;
+ }
+ else
+ switch (c)
+ {
+ case '\'':
+ inquote = TRUE; /* found first quote */
+ continue;
+ case '{': /* found open { comment */
+ incomment = TRUE;
+ continue;
+ case '(':
+ if (*dbp == '*') /* found open (* comment */
+ {
+ incomment = TRUE;
+ dbp++;
+ }
+ else if (found_tag) /* found '(' after tag, i.e., parm-list */
+ inparms = TRUE;
+ continue;
+ case ')': /* end of parms list */
+ if (inparms)
+ inparms = FALSE;
+ continue;
+ case ';':
+ if (found_tag && !inparms) /* end of proc or fn stmt */
+ {
+ verify_tag = TRUE;
+ break;
+ }
+ continue;
+ }
+ if (found_tag && verify_tag && (*dbp != ' '))
+ {
+ /* check if this is an "extern" declaration */
+ if (*dbp == '\0')
+ continue;
+ if (lowcase (*dbp == 'e'))
+ {
+ if (tail ("extern")) /* superfluous, really! */
+ {
+ found_tag = FALSE;
+ verify_tag = FALSE;
+ }
+ }
+ else if (lowcase (*dbp) == 'f')
+ {
+ if (tail ("forward")) /* check for forward reference */
+ {
+ found_tag = FALSE;
+ verify_tag = FALSE;
+ }
+ }
+ if (found_tag && verify_tag) /* not external proc, so make tag */
+ {
+ found_tag = FALSE;
+ verify_tag = FALSE;
+ pfnote (namebuf, TRUE,
+ tline.buffer, save_len, save_lineno, save_lcno);
+ continue;
+ }
+ }
+ if (get_tagname) /* grab name of proc or fn */
+ {
+ if (*dbp == '\0')
+ continue;
+
+ /* save all values for later tagging */
+ grow_linebuffer (&tline, lb.len + 1);
+ strcpy (tline.buffer, lb.buffer);
+ save_lineno = lineno;
+ save_lcno = linecharno;
+
+ /* grab block name */
+ for (cp = dbp + 1; *cp != '\0' && !endtoken (*cp); cp++)
+ continue;
+ namebuf = savenstr (dbp, cp-dbp);
+ dbp = cp; /* set dbp to e-o-token */
+ save_len = dbp - lb.buffer + 1;
+ get_tagname = FALSE;
+ found_tag = TRUE;
+ continue;
+
+ /* and proceed to check for "extern" */
+ }
+ else if (!incomment && !inquote && !found_tag)
+ {
+ /* check for proc/fn keywords */
+ switch (lowcase (c))
+ {
+ case 'p':
+ if (tail ("rocedure")) /* c = 'p', dbp has advanced */
+ get_tagname = TRUE;
+ continue;
+ case 'f':
+ if (tail ("unction"))
+ get_tagname = TRUE;
+ continue;
+ }
+ }
+ } /* while not eof */
+
+ free (tline.buffer);
+}
+\f
+/*
+ * lisp tag functions
+ * look for (def or (DEF, quote or QUOTE
+ */
+
+static int L_isdef P_((char *));
+static int L_isquote P_((char *));
+static void L_getit P_((void));
+
+static int
+L_isdef (strp)
+ register char *strp;
+{
+ return ((strp[1] == 'd' || strp[1] == 'D')
+ && (strp[2] == 'e' || strp[2] == 'E')
+ && (strp[3] == 'f' || strp[3] == 'F'));
+}
+
+static int
+L_isquote (strp)
+ register char *strp;
+{
+ return ((*++strp == 'q' || *strp == 'Q')
+ && (*++strp == 'u' || *strp == 'U')
+ && (*++strp == 'o' || *strp == 'O')
+ && (*++strp == 't' || *strp == 'T')
+ && (*++strp == 'e' || *strp == 'E')
+ && iswhite (*++strp));
+}
+
+static void
+L_getit ()
+{
+ register char *cp;
+
+ if (*dbp == '\'') /* Skip prefix quote */
+ dbp++;
+ else if (*dbp == '(')
+ {
+ if (L_isquote (dbp))
+ dbp += 7; /* Skip "(quote " */
+ else
+ dbp += 1; /* Skip "(" before name in (defstruct (foo)) */
+ dbp = skip_spaces (dbp);
+ }
+
+ for (cp = dbp /*+1*/;
+ *cp != '\0' && *cp != '(' && !iswhite(*cp) && *cp != ')';
+ cp++)
+ continue;
+ if (cp == dbp)
+ return;
+
+ pfnote (savenstr (dbp, cp-dbp), TRUE,
+ lb.buffer, cp - lb.buffer + 1, lineno, linecharno);
+}
+
+static void
+Lisp_functions (inf)
+ FILE *inf;
+{
+ LOOP_ON_INPUT_LINES (inf, lb, dbp)
+ {
+ if (dbp[0] == '(')
+ {
+ if (L_isdef (dbp))
+ {
+ dbp = skip_non_spaces (dbp);
+ dbp = skip_spaces (dbp);
+ L_getit ();
+ }
+ else
+ {
+ /* Check for (foo::defmumble name-defined ... */
+ do
+ dbp++;
+ while (*dbp != '\0' && !iswhite (*dbp)
+ && *dbp != ':' && *dbp != '(' && *dbp != ')');
+ if (*dbp == ':')
+ {
+ do
+ dbp++;
+ while (*dbp == ':');
+
+ if (L_isdef (dbp - 1))
+ {
+ dbp = skip_non_spaces (dbp);
+ dbp = skip_spaces (dbp);
+ L_getit ();
+ }
+ }
+ }
+ }
+ }
+}
+\f
+/*
+ * Postscript tag functions
+ * Just look for lines where the first character is '/'
+ * Richard Mlynarik <mly@adoc.xerox.com>
+ * Also look at "defineps" for PSWrap
+ * suggested by Masatake YAMATO <masata-y@is.aist-nara.ac.jp>
+ */
+static void
+Postscript_functions (inf)
+ FILE *inf;
+{
+ register char *bp, *ep;
+
+ LOOP_ON_INPUT_LINES (inf, lb, bp)
+ {
+ if (bp[0] == '/')
+ {
+ for (ep = bp+1;
+ *ep != '\0' && *ep != ' ' && *ep != '{';
+ ep++)
+ continue;
+ pfnote (savenstr (bp, ep-bp), TRUE,
+ lb.buffer, ep - lb.buffer + 1, lineno, linecharno);
+ }
+ else if (strneq (bp, "defineps", 8))
+ {
+ bp = skip_non_spaces (bp);
+ bp = skip_spaces (bp);
+ get_tag (bp);
+ }
+ }
+}
+
+\f
+/*
+ * Scheme tag functions
+ * look for (def... xyzzy
+ * look for (def... (xyzzy
+ * look for (def ... ((...(xyzzy ....
+ * look for (set! xyzzy
+ */
+
+static void
+Scheme_functions (inf)
+ FILE *inf;
+{
+ register char *bp;
+
+ LOOP_ON_INPUT_LINES (inf, lb, bp)
+ {
+ if (bp[0] == '('
+ && (bp[1] == 'D' || bp[1] == 'd')
+ && (bp[2] == 'E' || bp[2] == 'e')
+ && (bp[3] == 'F' || bp[3] == 'f'))
+ {
+ bp = skip_non_spaces (bp);
+ /* Skip over open parens and white space */
+ while (iswhite (*bp) || *bp == '(')
+ bp++;
+ get_tag (bp);
+ }
+ if (bp[0] == '('
+ && (bp[1] == 'S' || bp[1] == 's')
+ && (bp[2] == 'E' || bp[2] == 'e')
+ && (bp[3] == 'T' || bp[3] == 't')
+ && (bp[4] == '!' || bp[4] == '!')
+ && (iswhite (bp[5])))
+ {
+ bp = skip_non_spaces (bp);
+ bp = skip_spaces (bp);
+ get_tag (bp);
+ }
+ }
+}
+\f
+/* Find tags in TeX and LaTeX input files. */
+
+/* TEX_toktab is a table of TeX control sequences that define tags.
+ Each TEX_tabent records one such control sequence.
+ CONVERT THIS TO USE THE Stab TYPE!! */
+struct TEX_tabent
+{
+ char *name;
+ int len;
+};
+
+struct TEX_tabent *TEX_toktab = NULL; /* Table with tag tokens */
+
+/* Default set of control sequences to put into TEX_toktab.
+ The value of environment var TEXTAGS is prepended to this. */
+
+char *TEX_defenv = "\
+:chapter:section:subsection:subsubsection:eqno:label:ref:cite:bibitem\
+:part:appendix:entry:index";
+
+static void TEX_mode P_((FILE *));
+static struct TEX_tabent *TEX_decode_env P_((char *, char *));
+static int TEX_Token P_((char *));
+
+char TEX_esc = '\\';
+char TEX_opgrp = '{';
+char TEX_clgrp = '}';
+
+/*
+ * TeX/LaTeX scanning loop.
+ */
+static void
+TeX_functions (inf)
+ FILE *inf;
+{
+ char *cp, *lasthit;
+ register int i;
+
+ /* Select either \ or ! as escape character. */
+ TEX_mode (inf);
+
+ /* Initialize token table once from environment. */
+ if (!TEX_toktab)
+ TEX_toktab = TEX_decode_env ("TEXTAGS", TEX_defenv);
+
+ LOOP_ON_INPUT_LINES (inf, lb, cp)
+ {
+ lasthit = cp;
+ /* Look at each esc in line. */
+ while ((cp = etags_strchr (cp, TEX_esc)) != NULL)
+ {
+ if (*++cp == '\0')
+ break;
+ linecharno += cp - lasthit;
+ lasthit = cp;
+ i = TEX_Token (lasthit);
+ if (i >= 0)
+ {
+ /* We seem to include the TeX command in the tag name.
+ register char *p;
+ for (p = lasthit + TEX_toktab[i].len;
+ *p != '\0' && *p != TEX_clgrp;
+ p++)
+ continue; */
+ pfnote (/*savenstr (lasthit, p-lasthit)*/ (char *)NULL, TRUE,
+ lb.buffer, lb.len, lineno, linecharno);
+ break; /* We only tag a line once */
+ }
+ }
+ }
+}
+
+#define TEX_LESC '\\'
+#define TEX_SESC '!'
+#define TEX_cmt '%'
+
+/* Figure out whether TeX's escapechar is '\\' or '!' and set grouping
+ chars accordingly. */
+static void
+TEX_mode (inf)
+ FILE *inf;
+{
+ int c;
+
+ while ((c = getc (inf)) != EOF)
+ {
+ /* Skip to next line if we hit the TeX comment char. */
+ if (c == TEX_cmt)
+ while (c != '\n')
+ c = getc (inf);
+ else if (c == TEX_LESC || c == TEX_SESC )
+ break;
+ }
+
+ if (c == TEX_LESC)
+ {
+ TEX_esc = TEX_LESC;
+ TEX_opgrp = '{';
+ TEX_clgrp = '}';
+ }
+ else
+ {
+ TEX_esc = TEX_SESC;
+ TEX_opgrp = '<';
+ TEX_clgrp = '>';
+ }
+ /* If the input file is compressed, inf is a pipe, and rewind may fail.
+ No attempt is made to correct the situation. */
+ rewind (inf);
+}
+
+/* Read environment and prepend it to the default string.
+ Build token table. */
+static struct TEX_tabent *
+TEX_decode_env (evarname, defenv)
+ char *evarname;
+ char *defenv;
+{
+ register char *env, *p;
+
+ struct TEX_tabent *tab;
+ int size, i;
+
+ /* Append default string to environment. */
+ env = getenv (evarname);
+ if (!env)
+ env = defenv;
+ else
+ {
+ char *oldenv = env;
+ env = concat (oldenv, defenv, "");
+ }
+
+ /* Allocate a token table */
+ for (size = 1, p = env; p;)
+ if ((p = etags_strchr (p, ':')) && *++p != '\0')
+ size++;
+ /* Add 1 to leave room for null terminator. */
+ tab = xnew (size + 1, struct TEX_tabent);
+
+ /* Unpack environment string into token table. Be careful about */
+ /* zero-length strings (leading ':', "::" and trailing ':') */
+ for (i = 0; *env;)
+ {
+ p = etags_strchr (env, ':');
+ if (!p) /* End of environment string. */
+ p = env + strlen (env);
+ if (p - env > 0)
+ { /* Only non-zero strings. */
+ tab[i].name = savenstr (env, p - env);
+ tab[i].len = strlen (tab[i].name);
+ i++;
+ }
+ if (*p)
+ env = p + 1;
+ else
+ {
+ tab[i].name = NULL; /* Mark end of table. */
+ tab[i].len = 0;
+ break;
+ }
+ }
+ return tab;
+}
+
+/* If the text at CP matches one of the tag-defining TeX command names,
+ return the pointer to the first occurrence of that command in TEX_toktab.
+ Otherwise return -1.
+ Keep the capital `T' in `token' for dumb truncating compilers
+ (this distinguishes it from `TEX_toktab' */
+static int
+TEX_Token (cp)
+ char *cp;
+{
+ int i;
+
+ for (i = 0; TEX_toktab[i].len > 0; i++)
+ if (strneq (TEX_toktab[i].name, cp, TEX_toktab[i].len))
+ return i;
+ return -1;
+}
+\f
+/* Texinfo support. Dave Love, Mar. 2000. */
+static void
+Texinfo_functions (inf)
+ FILE * inf;
+{
+ char *cp, *start;
+ LOOP_ON_INPUT_LINES (inf, lb, cp)
+ {
+ if ((*cp++ == '@' && *cp++ == 'n' && *cp++ == 'o' && *cp++ == 'd'
+ && *cp++ == 'e' && iswhite (*cp++)))
+ {
+ while (iswhite (*cp))
+ cp++;
+ start = cp;
+ while (*cp != '\0' && *cp != ',')
+ cp++;
+ pfnote (savenstr (start, cp - start), TRUE,
+ lb.buffer, cp - lb.buffer + 1, lineno, linecharno);
+ }
+ }
+}
+\f
+/*
+ * Prolog support (rewritten) by Anders Lindgren, Mar. 96
+ *
+ * Assumes that the predicate starts at column 0.
+ * Only the first clause of a predicate is added.
+ */
+static int prolog_pred P_((char *, char *));
+static void prolog_skip_comment P_((linebuffer *, FILE *));
+static int prolog_atom P_((char *, int));
+
+static void
+Prolog_functions (inf)
+ FILE *inf;
+{
+ char *cp, *last;
+ int len;
+ int allocated;
+
+ allocated = 0;
+ len = 0;
+ last = NULL;
+
+ LOOP_ON_INPUT_LINES (inf, lb, cp)
+ {
+ if (cp[0] == '\0') /* Empty line */
+ continue;
+ else if (iswhite (cp[0])) /* Not a predicate */
+ continue;
+ else if (cp[0] == '/' && cp[1] == '*') /* comment. */
+ prolog_skip_comment (&lb, inf);
+ else if ((len = prolog_pred (cp, last)) > 0)
+ {
+ /* Predicate. Store the function name so that we only
+ generate a tag for the first clause. */
+ if (last == NULL)
+ last = xnew(len + 1, char);
+ else if (len + 1 > allocated)
+ last = xrnew (last, len + 1, char);
+ allocated = len + 1;
+ strncpy (last, cp, len);
+ last[len] = '\0';
+ }
+ }
+}
+
+
+static void
+prolog_skip_comment (plb, inf)
+ linebuffer *plb;
+ FILE *inf;
+{
+ char *cp;
+
+ do
+ {
+ for (cp = plb->buffer; *cp != '\0'; cp++)
+ if (cp[0] == '*' && cp[1] == '/')
+ return;
+ lineno++;
+ linecharno += readline (plb, inf);
+ }
+ while (!feof(inf));
+}
+
+/*
+ * A predicate definition is added if it matches:
+ * <beginning of line><Prolog Atom><whitespace>(
+ *
+ * It is added to the tags database if it doesn't match the
+ * name of the previous clause header.
+ *
+ * Return the size of the name of the predicate, or 0 if no header
+ * was found.
+ */
+static int
+prolog_pred (s, last)
+ char *s;
+ char *last; /* Name of last clause. */
+{
+ int pos;
+ int len;
+
+ pos = prolog_atom (s, 0);
+ if (pos < 1)
+ return 0;
+
+ len = pos;
+ pos = skip_spaces (s + pos) - s;
+
+ if ((s[pos] == '(') || (s[pos] == '.'))
+ {
+ if (s[pos] == '(')
+ pos++;
+
+ /* Save only the first clause. */
+ if (last == NULL
+ || len != (int)strlen (last)
+ || !strneq (s, last, len))
+ {
+ pfnote (savenstr (s, len), TRUE, s, pos, lineno, linecharno);
+ return len;
+ }
+ }
+ return 0;
+}
+
+/*
+ * Consume a Prolog atom.
+ * Return the number of bytes consumed, or -1 if there was an error.
+ *
+ * A prolog atom, in this context, could be one of:
+ * - An alphanumeric sequence, starting with a lower case letter.
+ * - A quoted arbitrary string. Single quotes can escape themselves.
+ * Backslash quotes everything.
+ */
+static int
+prolog_atom (s, pos)
+ char *s;
+ int pos;
+{
+ int origpos;
+
+ origpos = pos;
+
+ if (islower(s[pos]) || (s[pos] == '_'))
+ {
+ /* The atom is unquoted. */
+ pos++;
+ while (isalnum(s[pos]) || (s[pos] == '_'))
+ {
+ pos++;
+ }
+ return pos - origpos;
+ }
+ else if (s[pos] == '\'')
+ {
+ pos++;
+
+ while (1)
+ {
+ if (s[pos] == '\'')
+ {
+ pos++;
+ if (s[pos] != '\'')
+ break;
+ pos++; /* A double quote */
+ }
+ else if (s[pos] == '\0')
+ /* Multiline quoted atoms are ignored. */
+ return -1;
+ else if (s[pos] == '\\')
+ {
+ if (s[pos+1] == '\0')
+ return -1;
+ pos += 2;
+ }
+ else
+ pos++;
+ }
+ return pos - origpos;
+ }
+ else
+ return -1;
+}
+\f
+/*
+ * Support for Erlang -- Anders Lindgren, Feb 1996.
+ *
+ * Generates tags for functions, defines, and records.
+ *
+ * Assumes that Erlang functions start at column 0.
+ */
+static int erlang_func P_((char *, char *));
+static void erlang_attribute P_((char *));
+static int erlang_atom P_((char *, int));
+
+static void
+Erlang_functions (inf)
+ FILE *inf;
+{
+ char *cp, *last;
+ int len;
+ int allocated;
+
+ allocated = 0;
+ len = 0;
+ last = NULL;
+
+ LOOP_ON_INPUT_LINES (inf, lb, cp)
+ {
+ if (cp[0] == '\0') /* Empty line */
+ continue;
+ else if (iswhite (cp[0])) /* Not function nor attribute */
+ continue;
+ else if (cp[0] == '%') /* comment */
+ continue;
+ else if (cp[0] == '"') /* Sometimes, strings start in column one */
+ continue;
+ else if (cp[0] == '-') /* attribute, e.g. "-define" */
+ {
+ erlang_attribute (cp);
+ last = NULL;
+ }
+ else if ((len = erlang_func (cp, last)) > 0)
+ {
+ /*
+ * Function. Store the function name so that we only
+ * generates a tag for the first clause.
+ */
+ if (last == NULL)
+ last = xnew (len + 1, char);
+ else if (len + 1 > allocated)
+ last = xrnew (last, len + 1, char);
+ allocated = len + 1;
+ strncpy (last, cp, len);
+ last[len] = '\0';
+ }
+ }
+}
+
+
+/*
+ * A function definition is added if it matches:
+ * <beginning of line><Erlang Atom><whitespace>(
+ *
+ * It is added to the tags database if it doesn't match the
+ * name of the previous clause header.
+ *
+ * Return the size of the name of the function, or 0 if no function
+ * was found.
+ */
+static int
+erlang_func (s, last)
+ char *s;
+ char *last; /* Name of last clause. */
+{
+ int pos;
+ int len;
+
+ pos = erlang_atom (s, 0);
+ if (pos < 1)
+ return 0;
+
+ len = pos;
+ pos = skip_spaces (s + pos) - s;
+
+ /* Save only the first clause. */
+ if (s[pos++] == '('
+ && (last == NULL
+ || len != (int)strlen (last)
+ || !strneq (s, last, len)))
+ {
+ pfnote (savenstr (s, len), TRUE, s, pos, lineno, linecharno);
+ return len;
+ }
+
+ return 0;
+}
+
+
+/*
+ * Handle attributes. Currently, tags are generated for defines
+ * and records.
+ *
+ * They are on the form:
+ * -define(foo, bar).
+ * -define(Foo(M, N), M+N).
+ * -record(graph, {vtab = notable, cyclic = true}).
+ */
+static void
+erlang_attribute (s)
+ char *s;
+{
+ int pos;
+ int len;
+
+ if (strneq (s, "-define", 7) || strneq (s, "-record", 7))
+ {
+ pos = skip_spaces (s + 7) - s;
+ if (s[pos++] == '(')
+ {
+ pos = skip_spaces (s + pos) - s;
+ len = erlang_atom (s, pos);
+ if (len != 0)
+ pfnote (savenstr (& s[pos], len), TRUE,
+ s, pos + len, lineno, linecharno);
+ }
+ }
+ return;
+}
+
+
+/*
+ * Consume an Erlang atom (or variable).
+ * Return the number of bytes consumed, or -1 if there was an error.
+ */
+static int
+erlang_atom (s, pos)
+ char *s;
+ int pos;
+{
+ int origpos;
+
+ origpos = pos;
+
+ if (isalpha (s[pos]) || s[pos] == '_')
+ {
+ /* The atom is unquoted. */
+ pos++;
+ while (isalnum (s[pos]) || s[pos] == '_')
+ pos++;
+ return pos - origpos;
+ }
+ else if (s[pos] == '\'')
+ {
+ pos++;
+
+ while (1)
+ {
+ if (s[pos] == '\'')
+ {
+ pos++;
+ break;
+ }
+ else if (s[pos] == '\0')
+ /* Multiline quoted atoms are ignored. */
+ return -1;
+ else if (s[pos] == '\\')
+ {
+ if (s[pos+1] == '\0')
+ return -1;
+ pos += 2;
+ }
+ else
+ pos++;
+ }
+ return pos - origpos;
+ }
+ else
+ return -1;
+}
+\f
+#ifdef ETAGS_REGEXPS
+
+static char *scan_separators P_((char *));
+static void analyse_regex P_((char *, bool));
+static void add_regex P_((char *, bool, language *));
+static char *substitute P_((char *, char *, struct re_registers *));
+
+/* Take a string like "/blah/" and turn it into "blah", making sure
+ that the first and last characters are the same, and handling
+ quoted separator characters. Actually, stops on the occurrence of
+ an unquoted separator. Also turns "\t" into a Tab character.
+ Returns pointer to terminating separator. Works in place. Null
+ terminates name string. */
+static char *
+scan_separators (name)
+ char *name;
+{
+ char sep = name[0];
+ char *copyto = name;
+ bool quoted = FALSE;
+
+ for (++name; *name != '\0'; ++name)
+ {
+ if (quoted)
+ {
+ if (*name == 't')
+ *copyto++ = '\t';
+ else if (*name == sep)
+ *copyto++ = sep;
+ else
+ {
+ /* Something else is quoted, so preserve the quote. */
+ *copyto++ = '\\';
+ *copyto++ = *name;
+ }
+ quoted = FALSE;
+ }
+ else if (*name == '\\')
+ quoted = TRUE;
+ else if (*name == sep)
+ break;
+ else
+ *copyto++ = *name;
+ }
+
+ /* Terminate copied string. */
+ *copyto = '\0';
+ return name;
+}
+
+/* Look at the argument of --regex or --no-regex and do the right
+ thing. Same for each line of a regexp file. */
+static void
+analyse_regex (regex_arg, ignore_case)
+ char *regex_arg;
+ bool ignore_case;
+{
+ if (regex_arg == NULL)
+ free_patterns (); /* --no-regex: remove existing regexps */
+
+ /* A real --regexp option or a line in a regexp file. */
+ switch (regex_arg[0])
+ {
+ /* Comments in regexp file or null arg to --regex. */
+ case '\0':
+ case ' ':
+ case '\t':
+ break;
+
+ /* Read a regex file. This is recursive and may result in a
+ loop, which will stop when the file descriptors are exhausted. */
+ case '@':
+ {
+ FILE *regexfp;
+ linebuffer regexbuf;
+ char *regexfile = regex_arg + 1;
+
+ /* regexfile is a file containing regexps, one per line. */
+ regexfp = fopen (regexfile, "r");
+ if (regexfp == NULL)
+ {
+ pfatal (regexfile);
+ return;
+ }
+ initbuffer (®exbuf);
+ while (readline_internal (®exbuf, regexfp) > 0)
+ analyse_regex (regexbuf.buffer, ignore_case);
+ free (regexbuf.buffer);
+ fclose (regexfp);
+ }
+ break;
+
+ /* Regexp to be used for a specific language only. */
+ case '{':
+ {
+ language *lang;
+ char *lang_name = regex_arg + 1;
+ char *cp;
+
+ for (cp = lang_name; *cp != '}'; cp++)
+ if (*cp == '\0')
+ {
+ error ("unterminated language name in regex: %s", regex_arg);
+ return;
+ }
+ *cp = '\0';
+ lang = get_language_from_name (lang_name);
+ if (lang == NULL)
+ return;
+ add_regex (cp + 1, ignore_case, lang);
+ }
+ break;
+
+ /* Regexp to be used for any language. */
+ default:
+ add_regex (regex_arg, ignore_case, NULL);
+ break;
+ }
+}
+
+/* Turn a name, which is an ed-style (but Emacs syntax) regular
+ expression, into a real regular expression by compiling it. */
+static void
+add_regex (regexp_pattern, ignore_case, lang)
+ char *regexp_pattern;
+ bool ignore_case;
+ language *lang;
+{
+ char *name;
+ const char *err;
+ struct re_pattern_buffer *patbuf;
+ pattern *pp;
+
+
+ if (regexp_pattern[strlen(regexp_pattern)-1] != regexp_pattern[0])
+ {
+ error ("%s: unterminated regexp", regexp_pattern);
+ return;
+ }
+ name = scan_separators (regexp_pattern);
+ if (regexp_pattern[0] == '\0')
+ {
+ error ("null regexp", (char *)NULL);
+ return;
+ }
+ (void) scan_separators (name);
+
+ patbuf = xnew (1, struct re_pattern_buffer);
+ /* Translation table to fold case if appropriate. */
+ patbuf->translate = (ignore_case) ? lc_trans : NULL;
+ patbuf->fastmap = NULL;
+ patbuf->buffer = NULL;
+ patbuf->allocated = 0;
+
+ err = re_compile_pattern (regexp_pattern, strlen (regexp_pattern), patbuf);
+ if (err != NULL)
+ {
+ error ("%s while compiling pattern", err);
+ return;
+ }
+
+ pp = p_head;
+ p_head = xnew (1, pattern);
+ p_head->regex = savestr (regexp_pattern);
+ p_head->p_next = pp;
+ p_head->language = lang;
+ p_head->pattern = patbuf;
+ p_head->name_pattern = savestr (name);
+ p_head->error_signaled = FALSE;
+}
+
+/*
+ * Do the substitutions indicated by the regular expression and
+ * arguments.
+ */
+static char *
+substitute (in, out, regs)
+ char *in, *out;
+ struct re_registers *regs;
+{
+ char *result, *t;
+ int size, dig, diglen;
+
+ result = NULL;
+ size = strlen (out);
+
+ /* Pass 1: figure out how much to allocate by finding all \N strings. */
+ if (out[size - 1] == '\\')
+ fatal ("pattern error in \"%s\"", out);
+ for (t = etags_strchr (out, '\\');
+ t != NULL;
+ t = etags_strchr (t + 2, '\\'))
+ if (isdigit (t[1]))
+ {
+ dig = t[1] - '0';
+ diglen = regs->end[dig] - regs->start[dig];
+ size += diglen - 2;
+ }
+ else
+ size -= 1;
+
+ /* Allocate space and do the substitutions. */
+ result = xnew (size + 1, char);
+
+ for (t = result; *out != '\0'; out++)
+ if (*out == '\\' && isdigit (*++out))
+ {
+ /* Using "dig2" satisfies my debugger. Bleah. */
+ dig = *out - '0';
+ diglen = regs->end[dig] - regs->start[dig];
+ strncpy (t, in + regs->start[dig], diglen);
+ t += diglen;
+ }
+ else
+ *t++ = *out;
+ *t = '\0';
+
+ if (DEBUG && (t > result + size || t - result != (int)strlen (result)))
+ abort ();
+
+ return result;
+}
+
+/* Deallocate all patterns. */
+static void
+free_patterns ()
+{
+ pattern *pp;
+ while (p_head != NULL)
+ {
+ pp = p_head->p_next;
+ free (p_head->regex);
+ free (p_head->name_pattern);
+ free (p_head);
+ p_head = pp;
+ }
+ return;
+}
+\f
+static void
+get_tag (bp)
+ register char *bp;
+{
+ register char *cp;
+
+ if (*bp == '\0')
+ return;
+ /* Go till you get to white space or a syntactic break */
+ for (cp = bp + 1;
+ *cp != '\0' && *cp != '(' && *cp != ')' && !iswhite (*cp);
+ cp++)
+ continue;
+ pfnote (savenstr (bp, cp-bp), TRUE,
+ lb.buffer, cp - lb.buffer + 1, lineno, linecharno);
+}
+
+#endif /* ETAGS_REGEXPS */
+/* Initialize a linebuffer for use */
+static void
+initbuffer (lbp)
+ linebuffer *lbp;
+{
+ lbp->size = 200;
+ lbp->buffer = xnew (200, char);
+}
+
+/*
+ * Read a line of text from `stream' into `lbp', excluding the
+ * newline or CR-NL, if any. Return the number of characters read from
+ * `stream', which is the length of the line including the newline.
+ *
+ * On DOS or Windows we do not count the CR character, if any, before the
+ * NL, in the returned length; this mirrors the behavior of emacs on those
+ * platforms (for text files, it translates CR-NL to NL as it reads in the
+ * file).
+ */
+static long
+readline_internal (lbp, stream)
+ linebuffer *lbp;
+ register FILE *stream;
+{
+ char *buffer = lbp->buffer;
+ register char *p = lbp->buffer;
+ register char *pend;
+ int chars_deleted;
+
+ pend = p + lbp->size; /* Separate to avoid 386/IX compiler bug. */
+
+ while (1)
+ {
+ register int c = getc (stream);
+ if (p == pend)
+ {
+ /* We're at the end of linebuffer: expand it. */
+ lbp->size *= 2;
+ buffer = xrnew (buffer, lbp->size, char);
+ p += buffer - lbp->buffer;
+ pend = buffer + lbp->size;
+ lbp->buffer = buffer;
+ }
+ if (c == EOF)
+ {
+ *p = '\0';
+ chars_deleted = 0;
+ break;
+ }
+ if (c == '\n')
+ {
+ if (p > buffer && p[-1] == '\r')
+ {
+ p -= 1;
+#ifdef DOS_NT
+ /* Assume CRLF->LF translation will be performed by Emacs
+ when loading this file, so CRs won't appear in the buffer.
+ It would be cleaner to compensate within Emacs;
+ however, Emacs does not know how many CRs were deleted
+ before any given point in the file. */
+ chars_deleted = 1;
+#else
+ chars_deleted = 2;
+#endif
+ }
+ else
+ {
+ chars_deleted = 1;
+ }
+ *p = '\0';
+ break;
+ }
+ *p++ = c;
+ }
+ lbp->len = p - buffer;
+
+ return lbp->len + chars_deleted;
+}
+
+/*
+ * Like readline_internal, above, but in addition try to match the
+ * input line against relevant regular expressions.
+ */
+static long
+readline (lbp, stream)
+ linebuffer *lbp;
+ FILE *stream;
+{
+ /* Read new line. */
+ long result = readline_internal (lbp, stream);
+#ifdef ETAGS_REGEXPS
+ int match;
+ pattern *pp;
+
+ /* Match against relevant patterns. */
+ if (lbp->len > 0)
+ for (pp = p_head; pp != NULL; pp = pp->p_next)
+ {
+ /* Only use generic regexps or those for the current language. */
+ if (pp->language != NULL && pp->language != curlang)
+ continue;
+
+ match = re_match (pp->pattern, lbp->buffer, lbp->len, 0, &pp->regs);
+ switch (match)
+ {
+ case -2:
+ /* Some error. */
+ if (!pp->error_signaled)
+ {
+ error ("error while matching \"%s\"", pp->regex);
+ pp->error_signaled = TRUE;
+ }
+ break;
+ case -1:
+ /* No match. */
+ break;
+ default:
+ /* Match occurred. Construct a tag. */
+ if (pp->name_pattern[0] != '\0')
+ {
+ /* Make a named tag. */
+ char *name = substitute (lbp->buffer,
+ pp->name_pattern, &pp->regs);
+ if (name != NULL)
+ pfnote (name, TRUE, lbp->buffer, match, lineno, linecharno);
+ }
+ else
+ {
+ /* Make an unnamed tag. */
+ pfnote ((char *)NULL, TRUE,
+ lbp->buffer, match, lineno, linecharno);
+ }
+ break;
+ }
+ }
+#endif /* ETAGS_REGEXPS */
+
+ return result;
+}
+\f
+/*
+ * Return a pointer to a space of size strlen(cp)+1 allocated
+ * with xnew where the string CP has been copied.
+ */
+static char *
+savestr (cp)
+ char *cp;
+{
+ return savenstr (cp, strlen (cp));
+}
+
+/*
+ * Return a pointer to a space of size LEN+1 allocated with xnew where
+ * the string CP has been copied for at most the first LEN characters.
+ */
+static char *
+savenstr (cp, len)
+ char *cp;
+ int len;
+{
+ register char *dp;
+
+ dp = xnew (len + 1, char);
+ strncpy (dp, cp, len);
+ dp[len] = '\0';
+ return dp;
+}
+
+/*
+ * Return the ptr in sp at which the character c last
+ * appears; NULL if not found
+ *
+ * Identical to POSIX strrchr, included for portability.
+ */
+static char *
+etags_strrchr (sp, c)
+ register const char *sp;
+ register int c;
+{
+ register const char *r;
+
+ r = NULL;
+ do
+ {
+ if (*sp == c)
+ r = sp;
+ } while (*sp++);
+ return (char *)r;
+}
+
+
+/*
+ * Return the ptr in sp at which the character c first
+ * appears; NULL if not found
+ *
+ * Identical to POSIX strchr, included for portability.
+ */
+static char *
+etags_strchr (sp, c)
+ register const char *sp;
+ register int c;
+{
+ do
+ {
+ if (*sp == c)
+ return (char *)sp;
+ } while (*sp++);
+ return NULL;
+}
+
+/* Skip spaces, return new pointer. */
+static char *
+skip_spaces (cp)
+ char *cp;
+{
+ while (iswhite (*cp))
+ cp++;
+ return cp;
+}
+
+/* Skip non spaces, return new pointer. */
+static char *
+skip_non_spaces (cp)
+ char *cp;
+{
+ while (*cp != '\0' && !iswhite (*cp))
+ cp++;
+ return cp;
+}
+
+/* Print error message and exit. */
+static void
+fatal (s1, s2)
+ char *s1, *s2;
+{
+ error (s1, s2);
+ exit (BAD);
+}
+
+static void
+pfatal (s1)
+ char *s1;
+{
+ perror (s1);
+ exit (BAD);
+}
+
+static void
+suggest_asking_for_help ()
+{
+ fprintf (stderr, "\tTry `%s %s' for a complete list of options.\n",
+ progname,
+#ifdef LONG_OPTIONS
+ "--help"
+#else
+ "-h"
+#endif
+ );
+ exit (BAD);
+}
+
+/* Print error message. `s1' is printf control string, `s2' is arg for it. */
+static void
+error (s1, s2)
+ const char *s1, *s2;
+{
+ fprintf (stderr, "%s: ", progname);
+ fprintf (stderr, s1, s2);
+ fprintf (stderr, "\n");
+}
+
+/* Return a newly-allocated string whose contents
+ concatenate those of s1, s2, s3. */
+static char *
+concat (s1, s2, s3)
+ char *s1, *s2, *s3;
+{
+ int len1 = strlen (s1), len2 = strlen (s2), len3 = strlen (s3);
+ char *result = xnew (len1 + len2 + len3 + 1, char);
+
+ strcpy (result, s1);
+ strcpy (result + len1, s2);
+ strcpy (result + len1 + len2, s3);
+ result[len1 + len2 + len3] = '\0';
+
+ return result;
+}
+\f
+/* Does the same work as the system V getcwd, but does not need to
+ guess the buffer size in advance. */
+static char *
+etags_getcwd ()
+{
+#ifdef HAVE_GETCWD
+ int bufsize = 200;
+ char *path = xnew (bufsize, char);
+
+ while (getcwd (path, bufsize) == NULL)
+ {
+ if (errno != ERANGE)
+ pfatal ("getcwd");
+ bufsize *= 2;
+ free (path);
+ path = xnew (bufsize, char);
+ }
+
+ canonicalize_filename (path);
+ return path;
+
+#else /* not HAVE_GETCWD */
+#ifdef MSDOS
+ char *p, path[MAXPATHLEN + 1]; /* Fixed size is safe on MSDOS. */
+
+ getwd (path);
+
+ for (p = path; *p != '\0'; p++)
+ if (*p == '\\')
+ *p = '/';
+ else
+ *p = lowcase (*p);
+
+ return strdup (path);
+#else /* not MSDOS */
+ linebuffer path;
+ FILE *pipe;
+
+ initbuffer (&path);
+ pipe = (FILE *) popen ("pwd 2>/dev/null", "r");
+ if (pipe == NULL || readline_internal (&path, pipe) == 0)
+ pfatal ("pwd");
+ pclose (pipe);
+
+ return path.buffer;
+#endif /* not MSDOS */
+#endif /* not HAVE_GETCWD */
+}
+
+/* Return a newly allocated string containing the file name of FILE
+ relative to the absolute directory DIR (which should end with a slash). */
+static char *
+relative_filename (file, dir)
+ char *file, *dir;
+{
+ char *fp, *dp, *afn, *res;
+ int i;
+
+ /* Find the common root of file and dir (with a trailing slash). */
+ afn = absolute_filename (file, cwd);
+ fp = afn;
+ dp = dir;
+ while (*fp++ == *dp++)
+ continue;
+ fp--, dp--; /* back to the first differing char */
+#ifdef DOS_NT
+ if (fp == afn && afn[0] != '/') /* cannot build a relative name */
+ return afn;
+#endif
+ do /* look at the equal chars until '/' */
+ fp--, dp--;
+ while (*fp != '/');
+
+ /* Build a sequence of "../" strings for the resulting relative file name. */
+ i = 0;
+ while ((dp = etags_strchr (dp + 1, '/')) != NULL)
+ i += 1;
+ res = xnew (3*i + strlen (fp + 1) + 1, char);
+ res[0] = '\0';
+ while (i-- > 0)
+ strcat (res, "../");
+
+ /* Add the file name relative to the common root of file and dir. */
+ strcat (res, fp + 1);
+ free (afn);
+
+ return res;
+}
+
+/* Return a newly allocated string containing the absolute file name
+ of FILE given DIR (which should end with a slash). */
+static char *
+absolute_filename (file, dir)
+ char *file, *dir;
+{
+ char *slashp, *cp, *res;
+
+ if (filename_is_absolute (file))
+ res = savestr (file);
+#ifdef DOS_NT
+ /* We don't support non-absolute file names with a drive
+ letter, like `d:NAME' (it's too much hassle). */
+ else if (file[1] == ':')
+ fatal ("%s: relative file names with drive letters not supported", file);
+#endif
+ else
+ res = concat (dir, file, "");
+
+ /* Delete the "/dirname/.." and "/." substrings. */
+ slashp = etags_strchr (res, '/');
+ while (slashp != NULL && slashp[0] != '\0')
+ {
+ if (slashp[1] == '.')
+ {
+ if (slashp[2] == '.'
+ && (slashp[3] == '/' || slashp[3] == '\0'))
+ {
+ cp = slashp;
+ do
+ cp--;
+ while (cp >= res && !filename_is_absolute (cp));
+ if (cp < res)
+ cp = slashp; /* the absolute name begins with "/.." */
+#ifdef DOS_NT
+ /* Under MSDOS and NT we get `d:/NAME' as absolute
+ file name, so the luser could say `d:/../NAME'.
+ We silently treat this as `d:/NAME'. */
+ else if (cp[0] != '/')
+ cp = slashp;
+#endif
+ strcpy (cp, slashp + 3);
+ slashp = cp;
+ continue;
+ }
+ else if (slashp[2] == '/' || slashp[2] == '\0')
+ {
+ strcpy (slashp, slashp + 2);
+ continue;
+ }
+ }
+
+ slashp = etags_strchr (slashp + 1, '/');
+ }
+
+ if (res[0] == '\0')
+ return savestr ("/");
+ else
+ return res;
+}
+
+/* Return a newly allocated string containing the absolute
+ file name of dir where FILE resides given DIR (which should
+ end with a slash). */
+static char *
+absolute_dirname (file, dir)
+ char *file, *dir;
+{
+ char *slashp, *res;
+ char save;
+
+ canonicalize_filename (file);
+ slashp = etags_strrchr (file, '/');
+ if (slashp == NULL)
+ return savestr (dir);
+ save = slashp[1];
+ slashp[1] = '\0';
+ res = absolute_filename (file, dir);
+ slashp[1] = save;
+
+ return res;
+}
+
+/* Whether the argument string is an absolute file name. The argument
+ string must have been canonicalized with canonicalize_filename. */
+static bool
+filename_is_absolute (fn)
+ char *fn;
+{
+ return (fn[0] == '/'
+#ifdef DOS_NT
+ || (isalpha(fn[0]) && fn[1] == ':' && fn[2] == '/')
+#endif
+ );
+}
+
+/* Translate backslashes into slashes. Works in place. */
+static void
+canonicalize_filename (fn)
+ register char *fn;
+{
+#ifdef DOS_NT
+ /* Canonicalize drive letter case. */
+ if (fn[0] && fn[1] == ':' && islower (fn[0]))
+ fn[0] = toupper (fn[0]);
+ /* Convert backslashes to slashes. */
+ for (; *fn != '\0'; fn++)
+ if (*fn == '\\')
+ *fn = '/';
+#else
+ /* No action. */
+ fn = NULL; /* shut up the compiler */
+#endif
+}
+
+/* Increase the size of a linebuffer. */
+static void
+grow_linebuffer (lbp, toksize)
+ linebuffer *lbp;
+ int toksize;
+{
+ while (lbp->size < toksize)
+ lbp->size *= 2;
+ lbp->buffer = xrnew (lbp->buffer, lbp->size, char);
+}
+
+/* Like malloc but get fatal error if memory is exhausted. */
+long *
+xmalloc (size)
+ unsigned int size;
+{
+ long *result = (long *) malloc (size);
+ if (result == NULL)
+ fatal ("virtual memory exhausted", (char *)NULL);
+ return result;
+}
+
+long *
+xrealloc (ptr, size)
+ char *ptr;
+ unsigned int size;
+{
+ long *result = (long *) realloc (ptr, size);
+ if (result == NULL)
+ fatal ("virtual memory exhausted", (char *)NULL);
+ return result;
+}
HCoop / bpt / emacs.git / blobdiff