-/* Copyright (C) 1995, 1996, 1997 Free Software Foundation, Inc.
- *
- * 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, 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 software; see the file COPYING. If not, write to
- * the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
- *
- * As a special exception, the Free Software Foundation gives permission
- * for additional uses of the text contained in its release of GUILE.
- *
- * The exception is that, if you link the GUILE library with other files
- * to produce an executable, this does not by itself cause the
- * resulting executable to be covered by the GNU General Public License.
- * Your use of that executable is in no way restricted on account of
- * linking the GUILE library code into it.
- *
- * This exception does not however invalidate any other reasons why
- * the executable file might be covered by the GNU General Public License.
- *
- * This exception applies only to the code released by the
- * Free Software Foundation under the name GUILE. If you copy
- * code from other Free Software Foundation releases into a copy of
- * GUILE, as the General Public License permits, the exception does
- * not apply to the code that you add in this way. To avoid misleading
- * anyone as to the status of such modified files, you must delete
- * this exception notice from them.
- *
- * If you write modifications of your own for GUILE, it is your choice
- * whether to permit this exception to apply to your modifications.
- * If you do not wish that, delete this exception notice.
- */
-\f
-
-
-#include <stdio.h>
-#include "fd.h"
-#include "_scm.h"
-#include "genio.h"
-#include "read.h"
-#include "fports.h"
-#include "unif.h"
-#include "chars.h"
-
-#include "ioext.h"
-
-#ifdef HAVE_STRING_H
-#include <string.h>
-#endif
-#ifdef HAVE_UNISTD_H
-#include <unistd.h>
-#endif
-\f
-
-SCM_PROC (s_read_delimited_x, "%read-delimited!", 3, 3, 0, scm_read_delimited_x);
-
-SCM
-scm_read_delimited_x (delims, buf, gobble, port, start, end)
- SCM delims;
- SCM buf;
- SCM gobble;
- SCM port;
- SCM start;
- SCM end;
-{
- long j;
- char *cbuf;
- long cstart;
- long cend;
- int c;
- char *cdelims;
- int num_delims;
-
- SCM_ASSERT (SCM_NIMP (delims) && SCM_STRINGP (delims),
- delims, SCM_ARG1, s_read_delimited_x);
- cdelims = SCM_CHARS (delims);
- num_delims = SCM_LENGTH (delims);
- SCM_ASSERT (SCM_NIMP (buf) && SCM_STRINGP (buf),
- buf, SCM_ARG2, s_read_delimited_x);
- cbuf = SCM_CHARS (buf);
- cend = SCM_LENGTH (buf);
- if (SCM_UNBNDP (port))
- port = scm_cur_inp;
- else
- {
- SCM_ASSERT (SCM_NIMP (port) && SCM_OPINPORTP (port),
- port, SCM_ARG1, s_read_delimited_x);
- }
-
- if (SCM_UNBNDP (start))
- cstart = 0;
- else
- {
- cstart = scm_num2long (start,
- (char *) SCM_ARG5, s_read_delimited_x);
- if (cstart < 0 || cstart >= cend)
- scm_out_of_range (s_read_delimited_x, start);
-
- if (!SCM_UNBNDP (end))
- {
- long tend = scm_num2long (end, (char *) SCM_ARG6,
- s_read_delimited_x);
- if (tend <= cstart || tend > cend)
- scm_out_of_range (s_read_delimited_x, end);
- cend = tend;
- }
- }
-
- for (j = cstart; j < cend; j++)
- {
- int k;
-
- c = scm_gen_getc (port);
- for (k = 0; k < num_delims; k++)
- {
- if (cdelims[k] == c)
- {
- if (SCM_FALSEP (gobble))
- scm_gen_ungetc (c, port);
-
- return scm_cons (SCM_MAKICHR (c),
- scm_long2num (j - cstart));
- }
- }
- if (c == EOF)
- return scm_cons (SCM_EOF_VAL,
- scm_long2num (j - cstart));
-
- cbuf[j] = c;
- }
- return scm_cons (SCM_BOOL_F, scm_long2num (j - cstart));
-}
-
-SCM_PROC (s_write_line, "write-line", 1, 1, 0, scm_write_line);
-
-SCM
-scm_write_line (obj, port)
- SCM obj;
- SCM port;
-{
- scm_display (obj, port);
- return scm_newline (port);
-}
-
-SCM_PROC (s_ftell, "ftell", 1, 0, 0, scm_ftell);
-
-SCM
-scm_ftell (port)
- SCM port;
-{
- long pos;
- SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_ftell);
- SCM_SYSCALL (pos = ftell ((FILE *)SCM_STREAM (port)));
- if (pos < 0)
- scm_syserror (s_ftell);
- if (pos > 0 && SCM_CRDYP (port))
- pos--;
- return scm_long2num (pos);
-}
-
-
-
-SCM_PROC (s_fseek, "fseek", 3, 0, 0, scm_fseek);
-
-SCM
-scm_fseek (port, offset, whence)
- SCM port;
- SCM offset;
- SCM whence;
-{
- int rv;
- long loff;
-
- SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_fseek);
- loff = scm_num2long (offset, (char *)SCM_ARG2, s_fseek);
- SCM_ASSERT (SCM_INUMP (whence) && (SCM_INUM (whence) < 3) && (SCM_INUM (whence) >= 0),
- whence, SCM_ARG3, s_fseek);
-
- SCM_CLRDY (port); /* Clear ungetted char */
- /* Values of whence are interned in scm_init_ioext. */
- rv = fseek ((FILE *)SCM_STREAM (port), loff, SCM_INUM (whence));
- if (rv != 0)
- scm_syserror (s_fseek);
- return SCM_UNSPECIFIED;
-}
-
-
-
-SCM_PROC (s_freopen, "freopen", 3, 0, 0, scm_freopen);
-
-SCM
-scm_freopen (filename, modes, port)
- SCM filename;
- SCM modes;
- SCM port;
-{
- FILE *f;
- SCM_ASSERT (SCM_NIMP (filename) && SCM_STRINGP (filename), filename, SCM_ARG1, s_freopen);
- SCM_ASSERT (SCM_NIMP (modes) && SCM_STRINGP (modes), modes, SCM_ARG2, s_freopen);
- SCM_DEFER_INTS;
- SCM_ASSERT (SCM_NIMP (port) && SCM_FPORTP (port), port, SCM_ARG3, s_freopen);
- SCM_SYSCALL (f = freopen (SCM_CHARS (filename), SCM_CHARS (modes), (FILE *)SCM_STREAM (port)));
- if (!f)
- {
- SCM p;
- p = port;
- port = SCM_MAKINUM (errno);
- SCM_SETAND_CAR (p, ~SCM_OPN);
- scm_remove_from_port_table (p);
- }
- else
- {
- SCM_SETCAR (port, scm_tc16_fport | scm_mode_bits (SCM_CHARS (modes)));
- SCM_SETSTREAM (port, (SCM)f);
- SCM_SETCAR (port, scm_tc16_fport | scm_mode_bits (SCM_CHARS (modes)));
- if (SCM_BUF0 & SCM_CAR (port))
- scm_setbuf0 (port);
- }
- SCM_ALLOW_INTS;
- return port;
-}
-
-
-
-SCM_PROC (s_duplicate_port, "duplicate-port", 2, 0, 0, scm_duplicate_port);
-
-SCM
-scm_duplicate_port (oldpt, modes)
- SCM oldpt;
- SCM modes;
-{
- int oldfd;
- int newfd;
- FILE *f;
- SCM newpt;
- SCM_ASSERT (SCM_NIMP (oldpt) && SCM_OPPORTP (oldpt), oldpt, SCM_ARG1, s_duplicate_port);
- SCM_ASSERT (SCM_NIMP (modes) && SCM_STRINGP (modes), modes, SCM_ARG2, s_duplicate_port);
- SCM_NEWCELL (newpt);
- SCM_DEFER_INTS;
- oldfd = fileno ((FILE *)SCM_STREAM (oldpt));
- if (oldfd == -1)
- scm_syserror (s_duplicate_port);
- SCM_SYSCALL (newfd = dup (oldfd));
- if (newfd == -1)
- scm_syserror (s_duplicate_port);
- f = fdopen (newfd, SCM_CHARS (modes));
- if (!f)
- {
- SCM_SYSCALL (close (newfd));
- scm_syserror (s_duplicate_port);
- }
- {
- struct scm_port_table * pt;
- pt = scm_add_to_port_table (newpt);
- SCM_SETPTAB_ENTRY (newpt, pt);
- SCM_SETCAR (newpt, scm_tc16_fport | scm_mode_bits (SCM_CHARS (modes)));
- if (SCM_BUF0 & SCM_CAR (newpt))
- scm_setbuf0 (newpt);
- SCM_SETSTREAM (newpt, (SCM)f);
- SCM_PTAB_ENTRY (newpt)->file_name = SCM_PTAB_ENTRY (oldpt)->file_name;
- }
- SCM_ALLOW_INTS;
- return newpt;
-}
-
-
-
-SCM_PROC (s_redirect_port, "redirect-port", 2, 0, 0, scm_redirect_port);
-
-SCM
-scm_redirect_port (into_pt, from_pt)
- SCM into_pt;
- SCM from_pt;
-{
- int ans, oldfd, newfd;
- SCM_DEFER_INTS;
- SCM_ASSERT (SCM_NIMP (into_pt) && SCM_OPPORTP (into_pt), into_pt, SCM_ARG1, s_redirect_port);
- SCM_ASSERT (SCM_NIMP (from_pt) && SCM_OPPORTP (from_pt), from_pt, SCM_ARG2, s_redirect_port);
- oldfd = fileno ((FILE *)SCM_STREAM (into_pt));
- if (oldfd == -1)
- scm_syserror (s_redirect_port);
- newfd = fileno ((FILE *)SCM_STREAM (from_pt));
- if (newfd == -1)
- scm_syserror (s_redirect_port);
- SCM_SYSCALL (ans = dup2 (oldfd, newfd));
- if (ans == -1)
- scm_syserror (s_redirect_port);
- SCM_ALLOW_INTS;
- return SCM_UNSPECIFIED;
-}
-
-SCM_PROC (s_fileno, "fileno", 1, 0, 0, scm_fileno);
-
-SCM
-scm_fileno (port)
- SCM port;
-{
- int fd;
- SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_fileno);
- fd = fileno ((FILE *)SCM_STREAM (port));
- if (fd == -1)
- scm_syserror (s_fileno);
- return SCM_MAKINUM (fd);
-}
-
-SCM_PROC (s_isatty, "isatty?", 1, 0, 0, scm_isatty_p);
-
-SCM
-scm_isatty_p (port)
- SCM port;
-{
- int rv;
- SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_isatty);
- rv = fileno ((FILE *)SCM_STREAM (port));
- if (rv == -1)
- scm_syserror (s_isatty);
- rv = isatty (rv);
- return rv ? SCM_BOOL_T : SCM_BOOL_F;
-}
-
-
-
-SCM_PROC (s_fdopen, "fdopen", 2, 0, 0, scm_fdopen);
-
-SCM
-scm_fdopen (fdes, modes)
- SCM fdes;
- SCM modes;
-{
- FILE *f;
- SCM port;
- struct scm_port_table * pt;
-
- SCM_ASSERT (SCM_INUMP (fdes), fdes, SCM_ARG1, s_fdopen);
- SCM_ASSERT (SCM_NIMP (modes) && SCM_STRINGP (modes), modes, SCM_ARG2, s_fdopen);
- SCM_NEWCELL (port);
- SCM_DEFER_INTS;
- f = fdopen (SCM_INUM (fdes), SCM_CHARS (modes));
- if (f == NULL)
- scm_syserror (s_fdopen);
- pt = scm_add_to_port_table (port);
- SCM_SETPTAB_ENTRY (port, pt);
- SCM_SETCAR (port, scm_tc16_fport | scm_mode_bits (SCM_CHARS (modes)));
- if (SCM_BUF0 & SCM_CAR (port))
- scm_setbuf0 (port);
- SCM_SETSTREAM (port, (SCM)f);
- SCM_ALLOW_INTS;
- return port;
-}
-
-
-
-/* Move a port's underlying file descriptor to a given value.
- * Returns #f if fdes is already the given value.
- * #t if fdes moved.
- * MOVE->FDES is implemented in Scheme and calls this primitive.
- */
-SCM_PROC (s_primitive_move_to_fdes, "primitive-move->fdes", 2, 0, 0, scm_primitive_move_to_fdes);
-
-SCM
-scm_primitive_move_to_fdes (port, fd)
- SCM port;
- SCM fd;
-{
- FILE *stream;
- int old_fd;
- int new_fd;
- int rv;
-
- SCM_ASSERT (SCM_NIMP (port) && SCM_OPFPORTP (port), port, SCM_ARG1, s_primitive_move_to_fdes);
- SCM_ASSERT (SCM_INUMP (fd), fd, SCM_ARG2, s_primitive_move_to_fdes);
- SCM_DEFER_INTS;
- stream = (FILE *)SCM_STREAM (port);
- old_fd = fileno (stream);
- new_fd = SCM_INUM (fd);
- if (old_fd == new_fd)
- {
- SCM_ALLOW_INTS;
- return SCM_BOOL_F;
- }
- scm_evict_ports (new_fd);
- rv = dup2 (old_fd, new_fd);
- if (rv == -1)
- scm_syserror (s_primitive_move_to_fdes);
- scm_setfileno (stream, new_fd);
- SCM_SYSCALL (close (old_fd));
- SCM_ALLOW_INTS;
- return SCM_BOOL_T;
-}
-
-
-void
-scm_setfileno (fs, fd)
- FILE *fs;
- int fd;
-{
-#ifdef SET_FILE_FD_FIELD
- SET_FILE_FD_FIELD(fs, fd);
-#else
- Configure could not guess the name of the correct field in a FILE *.
-
- This function needs to be ported to your system.
-
- SET_FILE_FD_FIELD should change the descriptor refered to by a stdio
- stream, and nothing else.
-
- The way to port this file is to add cases to configure.in. Search
- that file for "SET_FILE_FD_FIELD" and follow the examples there.
-#endif
-}
-
-/* Move ports with the specified file descriptor to new descriptors,
- * reseting the revealed count to 0.
- * Should be called with SCM_DEFER_INTS active.
- */
-
-void
-scm_evict_ports (fd)
- int fd;
-{
- int i;
-
- for (i = 0; i < scm_port_table_size; i++)
- {
- if (SCM_FPORTP (scm_port_table[i]->port)
- && fileno ((FILE *)SCM_STREAM (scm_port_table[i]->port)) == fd)
- {
- scm_setfileno ((FILE *)SCM_STREAM (scm_port_table[i]->port), dup (fd));
- scm_set_port_revealed_x (scm_port_table[i]->port, SCM_MAKINUM (0));
- }
- }
-}
-
-/* Return a list of ports using a given file descriptor. */
-SCM_PROC(s_fdes_to_ports, "fdes->ports", 1, 0, 0, scm_fdes_to_ports);
-
-SCM
-scm_fdes_to_ports (fd)
- SCM fd;
-{
- SCM result = SCM_EOL;
- int int_fd;
- int i;
-
- SCM_ASSERT (SCM_INUMP (fd), fd, SCM_ARG1, s_fdes_to_ports);
- int_fd = SCM_INUM (fd);
-
- SCM_DEFER_INTS;
- for (i = 0; i < scm_port_table_size; i++)
- {
- if (SCM_FPORTP (scm_port_table[i]->port)
- && fileno ((FILE *)SCM_STREAM (scm_port_table[i]->port)) == int_fd)
- result = scm_cons (scm_port_table[i]->port, result);
- }
- SCM_ALLOW_INTS;
- return result;
-}
-
-
-void
-scm_init_ioext ()
-{
- /* fseek() symbols. */
- scm_sysintern ("SEEK_SET", SCM_MAKINUM (SEEK_SET));
- scm_sysintern ("SEEK_CUR", SCM_MAKINUM (SEEK_CUR));
- scm_sysintern ("SEEK_END", SCM_MAKINUM (SEEK_END));
-
- /* File type/permission bits. */
-#ifdef S_IRUSR
- scm_sysintern ("S_IRUSR", SCM_MAKINUM (S_IRUSR));
-#endif
-#ifdef S_IWUSR
- scm_sysintern ("S_IWUSR", SCM_MAKINUM (S_IWUSR));
-#endif
-#ifdef S_IXUSR
- scm_sysintern ("S_IXUSR", SCM_MAKINUM (S_IXUSR));
-#endif
-#ifdef S_IRWXU
- scm_sysintern ("S_IRWXU", SCM_MAKINUM (S_IRWXU));
-#endif
-
-#ifdef S_IRGRP
- scm_sysintern ("S_IRGRP", SCM_MAKINUM (S_IRGRP));
-#endif
-#ifdef S_IWGRP
- scm_sysintern ("S_IWGRP", SCM_MAKINUM (S_IWGRP));
-#endif
-#ifdef S_IXGRP
- scm_sysintern ("S_IXGRP", SCM_MAKINUM (S_IXGRP));
-#endif
-#ifdef S_IRWXG
- scm_sysintern ("S_IRWXG", SCM_MAKINUM (S_IRWXG));
-#endif
-
-#ifdef S_IROTH
- scm_sysintern ("S_IROTH", SCM_MAKINUM (S_IROTH));
-#endif
-#ifdef S_IWOTH
- scm_sysintern ("S_IWOTH", SCM_MAKINUM (S_IWOTH));
-#endif
-#ifdef S_IXOTH
- scm_sysintern ("S_IXOTH", SCM_MAKINUM (S_IXOTH));
-#endif
-#ifdef S_IRWXO
- scm_sysintern ("S_IRWXO", SCM_MAKINUM (S_IRWXO));
-#endif
-
-#ifdef S_ISUID
- scm_sysintern ("S_ISUID", SCM_MAKINUM (S_ISUID));
-#endif
-#ifdef S_ISGID
- scm_sysintern ("S_ISGID", SCM_MAKINUM (S_ISGID));
-#endif
-#ifdef S_ISVTX
- scm_sysintern ("S_ISVTX", SCM_MAKINUM (S_ISVTX));
-#endif
-
-#ifdef S_IFMT
- scm_sysintern ("S_IFMT", SCM_MAKINUM (S_IFMT));
-#endif
-#ifdef S_IFDIR
- scm_sysintern ("S_IFDIR", SCM_MAKINUM (S_IFDIR));
-#endif
-#ifdef S_IFCHR
- scm_sysintern ("S_IFCHR", SCM_MAKINUM (S_IFCHR));
-#endif
-#ifdef S_IFBLK
- scm_sysintern ("S_IFBLK", SCM_MAKINUM (S_IFBLK));
-#endif
-#ifdef S_IFREG
- scm_sysintern ("S_IFREG", SCM_MAKINUM (S_IFREG));
-#endif
-#ifdef S_IFLNK
- scm_sysintern ("S_IFLNK", SCM_MAKINUM (S_IFLNK));
-#endif
-#ifdef S_IFSOCK
- scm_sysintern ("S_IFSOCK", SCM_MAKINUM (S_IFSOCK));
-#endif
-#ifdef S_IFIFO
- scm_sysintern ("S_IFIFO", SCM_MAKINUM (S_IFIFO));
-#endif
-#include "ioext.x"
-}
-
+/* Copyright (C) 1995, 1996, 1997, 1998, 1999 Free Software Foundation, Inc.
+ *
+ * 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, 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 software; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
+ * Boston, MA 02111-1307 USA
+ *
+ * As a special exception, the Free Software Foundation gives permission
+ * for additional uses of the text contained in its release of GUILE.
+ *
+ * The exception is that, if you link the GUILE library with other files
+ * to produce an executable, this does not by itself cause the
+ * resulting executable to be covered by the GNU General Public License.
+ * Your use of that executable is in no way restricted on account of
+ * linking the GUILE library code into it.
+ *
+ * This exception does not however invalidate any other reasons why
+ * the executable file might be covered by the GNU General Public License.
+ *
+ * This exception applies only to the code released by the
+ * Free Software Foundation under the name GUILE. If you copy
+ * code from other Free Software Foundation releases into a copy of
+ * GUILE, as the General Public License permits, the exception does
+ * not apply to the code that you add in this way. To avoid misleading
+ * anyone as to the status of such modified files, you must delete
+ * this exception notice from them.
+ *
+ * If you write modifications of your own for GUILE, it is your choice
+ * whether to permit this exception to apply to your modifications.
+ * If you do not wish that, delete this exception notice. */
+
+/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
+ gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
+
+\f
+
+
+#include <stdio.h>
+#include "_scm.h"
+#include "ports.h"
+#include "read.h"
+#include "fports.h"
+#include "unif.h"
+#include "chars.h"
+#include "feature.h"
+
+#include "scm_validate.h"
+#include "ioext.h"
+
+#include <fcntl.h>
+
+#ifdef HAVE_STRING_H
+#include <string.h>
+#endif
+#ifdef HAVE_UNISTD_H
+#include <unistd.h>
+#endif
+\f
+
+GUILE_PROC (scm_read_delimited_x, "%read-delimited!", 3, 3, 0,
+ (SCM delims, SCM buf, SCM gobble, SCM port, SCM start, SCM end),
+"Read characters from @var{port} into @var{buf} until one of the
+characters in the @var{delims} string is encountered. If @var{gobble?}
+is true, store the delimiter character in @var{buf} as well; otherwise,
+discard it. If @var{port} is not specified, use the value of
+@code{(current-input-port)}. If @var{start} or @var{end} are specified,
+store data only into the substring of @var{buf} bounded by @var{start}
+and @var{end} (which default to the beginning and end of the buffer,
+respectively).
+
+Return a pair consisting of the delimiter that terminated the string and
+the number of characters read. If reading stopped at the end of file,
+the delimiter returned is the @var{eof-object}; if the buffer was filled
+without encountering a delimiter, this value is @var{#f}.")
+#define FUNC_NAME s_scm_read_delimited_x
+{
+ long j;
+ char *cbuf;
+ long cstart;
+ long cend, tend;
+ int c;
+ char *cdelims;
+ int num_delims;
+
+ SCM_VALIDATE_ROSTRING_COPY(1,delims,cdelims);
+ num_delims = SCM_ROLENGTH (delims);
+ SCM_VALIDATE_STRING_COPY(2,buf,cbuf);
+ cend = SCM_LENGTH (buf);
+ if (SCM_UNBNDP (port))
+ port = scm_cur_inp;
+ else
+ SCM_VALIDATE_OPINPORT(4,port);
+
+ SCM_VALIDATE_INT_DEF_COPY(5,start,0,cstart);
+ if (cstart < 0 || cstart >= cend)
+ scm_out_of_range (FUNC_NAME, start);
+
+ SCM_VALIDATE_INT_DEF_COPY(6,end,cend,tend);
+ if (tend <= cstart || tend > cend)
+ scm_out_of_range (FUNC_NAME, end);
+ cend = tend;
+
+ for (j = cstart; j < cend; j++)
+ {
+ int k;
+
+ c = scm_getc (port);
+ for (k = 0; k < num_delims; k++)
+ {
+ if (cdelims[k] == c)
+ {
+ if (SCM_FALSEP (gobble))
+ scm_ungetc (c, port);
+
+ return scm_cons (SCM_MAKICHR (c),
+ scm_long2num (j - cstart));
+ }
+ }
+ if (c == EOF)
+ return scm_cons (SCM_EOF_VAL,
+ scm_long2num (j - cstart));
+
+ cbuf[j] = c;
+ }
+ return scm_cons (SCM_BOOL_F, scm_long2num (j - cstart));
+}
+#undef FUNC_NAME
+
+static unsigned char *
+scm_do_read_line (SCM port, int *len_p)
+{
+ scm_port *pt = SCM_PTAB_ENTRY (port);
+ unsigned char *end;
+
+ /* I thought reading lines was simple. Mercy me. */
+
+ /* The common case: the buffer contains a complete line.
+ This needs to be fast. */
+ if ((end = memchr (pt->read_pos, '\n', (pt->read_end - pt->read_pos)))
+ != 0)
+ {
+ int buf_len = (end + 1) - pt->read_pos;
+ /* Allocate a buffer of the perfect size. */
+ unsigned char *buf = scm_must_malloc (buf_len + 1, "%read-line");
+
+ memcpy (buf, pt->read_pos, buf_len);
+ pt->read_pos += buf_len;
+
+ buf[buf_len] = '\0';
+
+ *len_p = buf_len;
+ return buf;
+ }
+
+ /* The buffer contains no newlines. */
+ {
+ /* When live, len is always the number of characters in the
+ current buffer that are part of the current line. */
+ int len = (pt->read_end - pt->read_pos);
+ int buf_size = (len < 50) ? 60 : len * 2;
+ /* Invariant: buf always has buf_size + 1 characters allocated;
+ the `+ 1' is for the final '\0'. */
+ unsigned char *buf = scm_must_malloc (buf_size + 1, "%read-line");
+ int buf_len = 0;
+
+ for (;;)
+ {
+ if (buf_len + len > buf_size)
+ {
+ int new_size = (buf_len + len) * 2;
+ buf = scm_must_realloc (buf, buf_size + 1, new_size + 1,
+ "%read-line");
+ buf_size = new_size;
+ }
+
+ /* Copy what we've got out of the port, into our buffer. */
+ memcpy (buf + buf_len, pt->read_pos, len);
+ buf_len += len;
+ pt->read_pos += len;
+
+ /* If we had seen a newline, we're done now. */
+ if (end)
+ break;
+
+ /* Get more characters. */
+ if (scm_fill_input (port) == EOF)
+ {
+ /* If we're missing a final newline in the file, return
+ what we did get, sans newline. */
+ if (buf_len > 0)
+ break;
+
+ free (buf);
+ return 0;
+ }
+
+ /* Search the buffer for newlines. */
+ if ((end = memchr (pt->read_pos, '\n',
+ (len = (pt->read_end - pt->read_pos))))
+ != 0)
+ len = (end - pt->read_pos) + 1;
+ }
+
+ /* I wonder how expensive this realloc is. */
+ buf = scm_must_realloc (buf, buf_size + 1, buf_len + 1, "%read-line");
+ buf[buf_len] = '\0';
+ *len_p = buf_len;
+ return buf;
+ }
+}
+
+
+/*
+ * %read-line
+ * truncates any terminating newline from its input, and returns
+ * a cons of the string read and its terminating character. Doing
+ * so makes it easy to implement the hairy `read-line' options
+ * efficiently in Scheme.
+ */
+
+GUILE_PROC (scm_read_line, "%read-line", 0, 1, 0,
+ (SCM port),
+"Read a newline-terminated line from @var{port}, allocating storage as
+necessary. The newline terminator (if any) is removed from the string,
+and a pair consisting of the line and its delimiter is returned. The
+delimiter may be either a newline or the @var{eof-object}; if
+@code{%read-line} is called at the end of file, it returns the pair
+@code{(#<eof> . #<eof>)}.")
+#define FUNC_NAME s_scm_read_line
+{
+ scm_port *pt;
+ char *s;
+ int slen;
+ SCM line, term;
+
+ if (SCM_UNBNDP (port))
+ port = scm_cur_inp;
+ SCM_VALIDATE_OPINPORT(1,port);
+
+ pt = SCM_PTAB_ENTRY (port);
+ if (pt->rw_active == SCM_PORT_WRITE)
+ scm_ptobs[SCM_PTOBNUM (port)].flush (port);
+
+ s = scm_do_read_line (port, &slen);
+
+ if (s == NULL)
+ term = line = SCM_EOF_VAL;
+ else
+ {
+ if (s[slen-1] == '\n')
+ {
+ term = SCM_MAKICHR ('\n');
+ s[slen-1] = '\0';
+ line = scm_take_str (s, slen-1);
+ scm_done_malloc (-1);
+ SCM_INCLINE (port);
+ }
+ else
+ {
+ /* Fix: we should check for eof on the port before assuming this. */
+ term = SCM_EOF_VAL;
+ line = scm_take_str (s, slen);
+ SCM_COL (port) += slen;
+ }
+ }
+
+ if (pt->rw_random)
+ pt->rw_active = SCM_PORT_READ;
+
+ return scm_cons (line, term);
+}
+#undef FUNC_NAME
+
+GUILE_PROC (scm_write_line, "write-line", 1, 1, 0,
+ (SCM obj, SCM port),
+"Display @var{obj} and a newline character to @var{port}. If @var{port}
+is not specified, @code{(current-output-port)} is used. This function
+is equivalent to:
+
+@smalllisp
+(display obj [port])
+(newline [port])
+@end smalllisp")
+#define FUNC_NAME s_scm_write_line
+{
+ scm_display (obj, port);
+ return scm_newline (port);
+}
+#undef FUNC_NAME
+
+GUILE_PROC (scm_ftell, "ftell", 1, 0, 0,
+ (SCM object),
+"Returns an integer representing the current position of @var{fd/port},
+measured from the beginning. Equivalent to:
+@smalllisp
+(seek port 0 SEEK_CUR)
+@end smalllisp")
+#define FUNC_NAME s_scm_ftell
+{
+ return scm_seek (object, SCM_INUM0, SCM_MAKINUM (SEEK_CUR));
+}
+#undef FUNC_NAME
+
+GUILE_PROC (scm_fseek, "fseek", 3, 0, 0,
+ (SCM object, SCM offset, SCM whence),
+"Obsolete. Almost the same as seek, above, but the return value is
+unspecified.")
+#define FUNC_NAME s_scm_fseek
+{
+ scm_seek (object, offset, whence);
+ return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+
+GUILE_PROC (scm_redirect_port, "redirect-port", 2, 0, 0,
+ (SCM old, SCM new),
+"This procedure takes two ports and duplicates the underlying file
+descriptor from @var{old-port} into @var{new-port}. The
+current file descriptor in @var{new-port} will be closed.
+After the redirection the two ports will share a file position
+and file status flags.
+
+The return value is unspecified.
+
+Unexpected behaviour can result if both ports are subsequently used
+and the original and/or duplicate ports are buffered.
+
+This procedure does not have any side effects on other ports or
+revealed counts.")
+#define FUNC_NAME s_scm_redirect_port
+{
+ int ans, oldfd, newfd;
+ struct scm_fport *fp;
+
+ old = SCM_COERCE_OUTPORT (old);
+ new = SCM_COERCE_OUTPORT (new);
+
+ SCM_VALIDATE_OPFPORT(1,old);
+ SCM_VALIDATE_OPFPORT(2,new);
+ oldfd = SCM_FPORT_FDES (old);
+ fp = SCM_FSTREAM (new);
+ newfd = fp->fdes;
+ if (oldfd != newfd)
+ {
+ scm_port *pt = SCM_PTAB_ENTRY (new);
+ scm_port *old_pt = SCM_PTAB_ENTRY (old);
+ scm_ptob_descriptor *ptob = &scm_ptobs[SCM_PTOBNUM (new)];
+
+ /* must flush to old fdes. */
+ if (pt->rw_active == SCM_PORT_WRITE)
+ ptob->flush (new);
+ else if (pt->rw_active == SCM_PORT_READ)
+ scm_end_input (new);
+ ans = dup2 (oldfd, newfd);
+ if (ans == -1)
+ SCM_SYSERROR;
+ pt->rw_random = old_pt->rw_random;
+ /* continue using existing buffers, even if inappropriate. */
+ }
+ return SCM_UNSPECIFIED;
+}
+#undef FUNC_NAME
+
+GUILE_PROC (scm_dup_to_fdes, "dup->fdes", 1, 1, 0,
+ (SCM fd_or_port, SCM fd),
+"Returns an integer file descriptor.")
+#define FUNC_NAME s_scm_dup_to_fdes
+{
+ int oldfd, newfd, rv;
+
+ fd_or_port = SCM_COERCE_OUTPORT (fd_or_port);
+
+ if (SCM_INUMP (fd_or_port))
+ oldfd = SCM_INUM (fd_or_port);
+ else
+ {
+ SCM_VALIDATE_OPFPORT(1,fd_or_port);
+ oldfd = SCM_FPORT_FDES (fd_or_port);
+ }
+
+ if (SCM_UNBNDP (fd))
+ {
+ newfd = dup (oldfd);
+ if (newfd == -1)
+ SCM_SYSERROR;
+ fd = SCM_MAKINUM (newfd);
+ }
+ else
+ {
+ SCM_ASSERT (SCM_INUMP (fd), fd, SCM_ARG2, FUNC_NAME);
+ newfd = SCM_INUM (fd);
+ if (oldfd != newfd)
+ {
+ scm_evict_ports (newfd); /* see scsh manual. */
+ rv = dup2 (oldfd, newfd);
+ if (rv == -1)
+ SCM_SYSERROR;
+ }
+ }
+ return fd;
+}
+#undef FUNC_NAME
+
+GUILE_PROC (scm_fileno, "fileno", 1, 0, 0,
+ (SCM port),
+"Returns the integer file descriptor underlying @var{port}.
+Does not change its revealed count.")
+#define FUNC_NAME s_scm_fileno
+{
+ port = SCM_COERCE_OUTPORT (port);
+ SCM_VALIDATE_OPFPORT(1,port);
+ return SCM_MAKINUM (SCM_FPORT_FDES (port));
+}
+#undef FUNC_NAME
+
+/* GJB:FIXME:: why does this not throw
+ an error if the arg is not a port?
+ This proc as is would be better names isattyport?
+ if it is not going to assume that the arg is a port */
+GUILE_PROC (scm_isatty_p, "isatty?", 1, 0, 0,
+ (SCM port),
+"Returns @code{#t} if @var{port} is using a serial
+non-file device, otherwise @code{#f}.")
+#define FUNC_NAME s_scm_isatty_p
+{
+ int rv;
+
+ port = SCM_COERCE_OUTPORT (port);
+
+ if (!(SCM_NIMP (port) && SCM_OPFPORTP (port)))
+ return SCM_BOOL_F;
+
+ rv = isatty (SCM_FPORT_FDES (port));
+ return SCM_BOOL(rv);
+}
+#undef FUNC_NAME
+
+
+
+GUILE_PROC (scm_fdopen, "fdopen", 2, 0, 0,
+ (SCM fdes, SCM modes),
+"Returns a new port based on the file descriptor @var{fdes}.
+Modes are given by the string @var{modes}. The revealed count of the port
+is initialized to zero. The modes string is the same as that accepted
+by @ref{File Ports, open-file}.")
+#define FUNC_NAME s_scm_fdopen
+{
+ SCM port;
+
+ SCM_VALIDATE_INT(1,fdes);
+ SCM_VALIDATE_ROSTRING(2,modes);
+ SCM_COERCE_SUBSTR (modes);
+ port = scm_fdes_to_port (SCM_INUM (fdes), SCM_ROCHARS (modes), SCM_BOOL_F);
+ return port;
+}
+#undef FUNC_NAME
+
+
+
+/* Move a port's underlying file descriptor to a given value.
+ * Returns #f if fdes is already the given value.
+ * #t if fdes moved.
+ * MOVE->FDES is implemented in Scheme and calls this primitive.
+ */
+GUILE_PROC (scm_primitive_move_to_fdes, "primitive-move->fdes", 2, 0, 0,
+ (SCM port, SCM fd),
+"Moves the underlying file descriptor for @var{port} to the integer
+value @var{fdes} without changing the revealed count of @var{port}.
+Any other ports already using this descriptor will be automatically
+shifted to new descriptors and their revealed counts reset to zero.
+The return value is @code{#f} if the file descriptor already had the
+required value or @code{#t} if it was moved.")
+#define FUNC_NAME s_scm_primitive_move_to_fdes
+{
+ struct scm_fport *stream;
+ int old_fd;
+ int new_fd;
+ int rv;
+
+ port = SCM_COERCE_OUTPORT (port);
+
+ SCM_VALIDATE_OPFPORT(1,port);
+ SCM_VALIDATE_INT(2,fd);
+ stream = SCM_FSTREAM (port);
+ old_fd = stream->fdes;
+ new_fd = SCM_INUM (fd);
+ if (old_fd == new_fd)
+ {
+ return SCM_BOOL_F;
+ }
+ scm_evict_ports (new_fd);
+ rv = dup2 (old_fd, new_fd);
+ if (rv == -1)
+ SCM_SYSERROR;
+ stream->fdes = new_fd;
+ SCM_SYSCALL (close (old_fd));
+ return SCM_BOOL_T;
+}
+#undef FUNC_NAME
+
+/* Return a list of ports using a given file descriptor. */
+GUILE_PROC(scm_fdes_to_ports, "fdes->ports", 1, 0, 0,
+ (SCM fd),
+"Returns a list of existing ports which have @var{fdes} as an
+underlying file descriptor, without changing their revealed counts.")
+#define FUNC_NAME s_scm_fdes_to_ports
+{
+ SCM result = SCM_EOL;
+ int int_fd;
+ int i;
+
+ SCM_VALIDATE_INT_COPY(1,fd,int_fd);
+
+ for (i = 0; i < scm_port_table_size; i++)
+ {
+ if (SCM_OPFPORTP (scm_port_table[i]->port)
+ && ((struct scm_fport *) scm_port_table[i]->stream)->fdes == int_fd)
+ result = scm_cons (scm_port_table[i]->port, result);
+ }
+ return result;
+}
+#undef FUNC_NAME
+
+
+void
+scm_init_ioext ()
+{
+ scm_add_feature ("i/o-extensions");
+
+#include "ioext.x"
+}
+
HCoop / bpt / guile.git / blobdiff