Add GCC-style 'const' attribute to functions that can use it.

[bpt/emacs.git] / lib-src / etags.c

diff --git a/lib-src/etags.c b/lib-src/etags.c
index 7d2a5a9..7141811 100644 (file)
--- a/lib-src/etags.c
+++ b/lib-src/etags.c
@@ -91,9 +91,7 @@ char pot_etags_version[] = "@(#) pot revision number is 17.38.1.4";
 #  define NDEBUG               /* disable assert */
 #endif
 
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif /* !HAVE_CONFIG_H */
+#include <config.h>
 
 #ifndef _GNU_SOURCE
 # define _GNU_SOURCE 1         /* enables some compiler checks on GNU */
@@ -113,10 +111,6 @@ char pot_etags_version[] = "@(#) pot revision number is 17.38.1.4";
 # 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 */
@@ -150,6 +144,7 @@ char pot_etags_version[] = "@(#) pot revision number is 17.38.1.4";
 #include <errno.h>
 #include <sys/types.h>
 #include <sys/stat.h>
+#include <c-strcase.h>
 
 #include <assert.h>
 #ifdef NDEBUG
@@ -167,14 +162,6 @@ char pot_etags_version[] = "@(#) pot revision number is 17.38.1.4";
 # include <getopt.h>
 #endif /* NO_LONG_OPTIONS */
 
-#ifndef HAVE_CONFIG_H          /* this is a standalone compilation */
-# ifdef __CYGWIN__             /* compiling on Cygwin */
-                            !!! NOTICE !!!
- the regex.h distributed with Cygwin is not compatible with etags, alas!
-If you want regular expression support, you should delete this notice and
-             arrange to use the GNU regex.h and regex.c.
-# endif
-#endif
 #include <regex.h>
 
 /* Define CTAGS to make the program "ctags" compatible with the usual one.
@@ -188,9 +175,9 @@ If you want regular expression support, you should delete this notice and
 #endif
 
 #define streq(s,t)     (assert ((s)!=NULL || (t)!=NULL), !strcmp (s, t))
-#define strcaseeq(s,t) (assert ((s)!=NULL && (t)!=NULL), !etags_strcasecmp (s, t))
+#define strcaseeq(s,t) (assert ((s)!=NULL && (t)!=NULL), !c_strcasecmp (s, t))
 #define strneq(s,t,n)  (assert ((s)!=NULL || (t)!=NULL), !strncmp (s, t, n))
-#define strncaseeq(s,t,n) (assert ((s)!=NULL && (t)!=NULL), !etags_strncasecmp (s, t, n))
+#define strncaseeq(s,t,n) (assert ((s)!=NULL && (t)!=NULL), !c_strncasecmp (s, t, n))
 
 #define CHARS 256              /* 2^sizeof(char) */
 #define CHAR(x)                ((unsigned int)(x) & (CHARS - 1))
@@ -366,9 +353,9 @@ static void analyse_regex (char *);
 static void free_regexps (void);
 static void regex_tag_multiline (void);
 static void error (const char *, ...) ATTRIBUTE_FORMAT_PRINTF (1, 2);
-static void suggest_asking_for_help (void) NO_RETURN;
-void fatal (const char *, const char *) NO_RETURN;
-static void pfatal (const char *) NO_RETURN;
+static _Noreturn void suggest_asking_for_help (void);
+_Noreturn void fatal (const char *, const char *);
+static _Noreturn void pfatal (const char *);
 static void add_node (node *, node **);
 
 static void init (void);
@@ -389,8 +376,6 @@ static char *savenstr (const char *, int);
 static char *savestr (const char *);
 static char *etags_strchr (const char *, int);
 static char *etags_strrchr (const char *, int);
-static int etags_strcasecmp (const char *, const char *);
-static int etags_strncasecmp (const char *, const char *, int);
 static char *etags_getcwd (void);
 static char *relative_filename (char *, char *);
 static char *absolute_filename (char *, char *);
@@ -2138,7 +2123,7 @@ invalidate_nodes (fdesc *badfdp, node **npp)
 
 \f
 static int total_size_of_entries (node *);
-static int number_len (long);
+static int number_len (long) ATTRIBUTE_CONST;
 
 /* Length of a non-negative number's decimal representation. */
 static int
@@ -6320,48 +6305,6 @@ etags_strchr (register const char *sp, register int c)
   return NULL;
 }
 
-/*
- * Compare two strings, ignoring case for alphabetic characters.
- *
- * Same as BSD's strcasecmp, included for portability.
- */
-static int
-etags_strcasecmp (register const char *s1, register const char *s2)
-{
-  while (*s1 != '\0'
-        && (ISALPHA (*s1) && ISALPHA (*s2)
-            ? lowcase (*s1) == lowcase (*s2)
-            : *s1 == *s2))
-    s1++, s2++;
-
-  return (ISALPHA (*s1) && ISALPHA (*s2)
-         ? lowcase (*s1) - lowcase (*s2)
-         : *s1 - *s2);
-}
-
-/*
- * Compare two strings, ignoring case for alphabetic characters.
- * Stop after a given number of characters
- *
- * Same as BSD's strncasecmp, included for portability.
- */
-static int
-etags_strncasecmp (register const char *s1, register const char *s2, register int n)
-{
-  while (*s1 != '\0' && n-- > 0
-        && (ISALPHA (*s1) && ISALPHA (*s2)
-            ? lowcase (*s1) == lowcase (*s2)
-            : *s1 == *s2))
-    s1++, s2++;
-
-  if (n < 0)
-    return 0;
-  else
-    return (ISALPHA (*s1) && ISALPHA (*s2)
-           ? lowcase (*s1) - lowcase (*s2)
-           : *s1 - *s2);
-}
-
 /* Skip spaces (end of string is not space), return new pointer. */
 static char *
 skip_spaces (char *cp)