/* util.c -- utility functions for gzip support
- * Copyright (C) 1997, 1998, 1999, 2001 Free Software Foundation, Inc.
- * Copyright (C) 1992-1993 Jean-loup Gailly
- * This is free software; you can redistribute it and/or modify it under the
- * terms of the GNU General Public License, see the file COPYING.
- */
-#ifdef RCSID
-static char rcsid[] = "$Id: util.c,v 0.15 1993/06/15 09:04:13 jloup Exp $";
-#endif
+ Copyright (C) 1997-1999, 2001-2002, 2006, 2009-2010 Free Software
+ Foundation, Inc.
+ Copyright (C) 1992-1993 Jean-loup Gailly
+
+ 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 3, 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#include <config.h>
#include <ctype.h>
#include "tailor.h"
-#ifdef HAVE_LIMITS_H
-# include <limits.h>
-#endif
-#ifdef HAVE_UNISTD_H
-# include <unistd.h>
-#endif
-#ifdef HAVE_FCNTL_H
-# include <fcntl.h>
-#endif
-
-#if defined STDC_HEADERS || defined HAVE_STDLIB_H
-# include <stdlib.h>
-#else
- extern int errno;
-#endif
+#include <limits.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <stdlib.h>
+#include <errno.h>
#include "gzip.h"
#include "crypt.h"
+#include <xalloc.h>
#ifndef CHAR_BIT
# define CHAR_BIT 8
#endif
+static int write_buffer OF((int, voidp, unsigned int));
+
extern ulg crc_32_tab[]; /* crc table, defined below */
/* ===========================================================================
while (insize != 0 && (int)insize != -1) {
write_buf(out, (char*)inbuf, insize);
bytes_out += insize;
- insize = read(in, (char*)inbuf, INBUFSIZ);
+ insize = read_buffer (in, (char *) inbuf, INBUFSIZ);
}
if ((int)insize == -1) {
read_error();
/* Read as much as possible */
insize = 0;
do {
- len = read(ifd, (char*)inbuf+insize, INBUFSIZ-insize);
+ len = read_buffer (ifd, (char *) inbuf + insize, INBUFSIZ - insize);
if (len == 0) break;
if (len == -1) {
read_error();
return inbuf[0];
}
+/* Like the standard read function, except do not attempt to read more
+ than SSIZE_MAX bytes at a time. */
+int
+read_buffer (fd, buf, cnt)
+ int fd;
+ voidp buf;
+ unsigned int cnt;
+{
+ if (INT_MAX < cnt)
+ cnt = INT_MAX;
+ return read (fd, buf, cnt);
+}
+
+/* Likewise for 'write'. */
+static int
+write_buffer (fd, buf, cnt)
+ int fd;
+ voidp buf;
+ unsigned int cnt;
+{
+ if (INT_MAX < cnt)
+ cnt = INT_MAX;
+ return write (fd, buf, cnt);
+}
+
/* ===========================================================================
* Write the output buffer outbuf[0..outcnt-1] and update bytes_out.
* (used for the compressed data only)
{
unsigned n;
- while ((n = write(fd, buf, cnt)) != cnt) {
+ while ((n = write_buffer (fd, buf, cnt)) != cnt) {
if (n == (unsigned)(-1)) {
write_error();
}
* any version suffix). For systems with file names that are not
* case sensitive, force the base name to lower case.
*/
-char *base_name(fname)
+char *
+gzip_base_name (fname)
char *fname;
{
char *p;
} while (p != name);
}
-
-#if !defined HAVE_STRING_H && !defined STDC_HEADERS
-
-/* Provide missing strspn and strcspn functions. */
-
-# ifndef __STDC__
-# define const
-# endif
-
-int strspn OF((const char *s, const char *accept));
-int strcspn OF((const char *s, const char *reject));
-
-/* ========================================================================
- * Return the length of the maximum initial segment
- * of s which contains only characters in accept.
- */
-int strspn(s, accept)
- const char *s;
- const char *accept;
-{
- register const char *p;
- register const char *a;
- register int count = 0;
-
- for (p = s; *p != '\0'; ++p) {
- for (a = accept; *a != '\0'; ++a) {
- if (*p == *a) break;
- }
- if (*a == '\0') return count;
- ++count;
- }
- return count;
-}
-
-/* ========================================================================
- * Return the length of the maximum inital segment of s
- * which contains no characters from reject.
- */
-int strcspn(s, reject)
- const char *s;
- const char *reject;
-{
- register int count = 0;
-
- while (*s != '\0') {
- if (strchr(reject, *s++) != NULL) return count;
- ++count;
- }
- return count;
-}
-
-#endif
-
/* ========================================================================
* Add an environment variable (if any) before argv, and update argc.
- * Return the expanded environment variable to be freed later, or NULL
+ * Return the expanded environment variable to be freed later, or NULL
* if no options were added to argv.
*/
#define SEPARATOR " \t" /* separators in env variable */
-char *add_envopt(argcp, argvp, env)
- int *argcp; /* pointer to argc */
- char ***argvp; /* pointer to argv */
- char *env; /* name of environment variable */
+char *add_envopt(
+ int *argcp, /* pointer to argc */
+ char ***argvp, /* pointer to argv */
+ char const *envvar_name) /* name of environment variable */
{
char *p; /* running pointer through env variable */
char **oargv; /* runs through old argv array */
char **nargv; /* runs through new argv array */
int oargc = *argcp; /* old argc */
int nargc = 0; /* number of arguments in env variable */
+ char *env_val;
- env = (char*)getenv(env);
- if (env == NULL) return NULL;
+ env_val = getenv(envvar_name);
+ if (env_val == NULL) return NULL;
- p = (char*)xmalloc(strlen(env)+1);
- env = strcpy(p, env); /* keep env variable intact */
+ env_val = xstrdup (env_val);
- for (p = env; *p; nargc++ ) { /* move through env */
+ for (p = env_val; *p; nargc++ ) { /* move through env_val */
p += strspn(p, SEPARATOR); /* skip leading separators */
if (*p == '\0') break;
if (*p) *p++ = '\0'; /* mark it */
}
if (nargc == 0) {
- free(env);
+ free(env_val);
return NULL;
}
*argcp += nargc;
/* Allocate the new argv array, with an extra element just in case
* the original arg list did not end with a NULL.
*/
- nargv = (char**)calloc(*argcp+1, sizeof(char *));
- if (nargv == NULL) error("out of memory");
+ nargv = xcalloc (*argcp + 1, sizeof (char *));
oargv = *argvp;
*argvp = nargv;
/* Copy the program name first */
- if (oargc-- < 0) error("argc<=0");
+ if (oargc-- < 0)
+ gzip_error ("argc<=0");
*(nargv++) = *(oargv++);
/* Then copy the environment args */
- for (p = env; nargc > 0; nargc--) {
+ for (p = env_val; nargc > 0; nargc--) {
p += strspn(p, SEPARATOR); /* skip separators */
*(nargv++) = p; /* store start */
while (*p++) ; /* skip over word */
/* Finally copy the old args and add a NULL (usual convention) */
while (oargc--) *(nargv++) = *(oargv++);
*nargv = NULL;
- return env;
+ return env_val;
}
/* ========================================================================
* Error handlers.
*/
-void error(m)
- char *m;
+void
+gzip_error (char const *m)
{
- fprintf(stderr, "\n%s: %s: %s\n", progname, ifname, m);
+ fprintf (stderr, "\n%s: %s: %s\n", program_name, ifname, m);
abort_gzip();
}
-void warning (m)
- char *m;
+void
+xalloc_die ()
+{
+ fprintf (stderr, "\n%s: memory_exhausted\n", program_name);
+ abort_gzip ();
+}
+
+void warning (char const *m)
{
- WARN ((stderr, "%s: %s: warning: %s\n", progname, ifname, m));
+ WARN ((stderr, "%s: %s: warning: %s\n", program_name, ifname, m));
}
void read_error()
{
int e = errno;
- fprintf(stderr, "\n%s: ", progname);
+ fprintf (stderr, "\n%s: ", program_name);
if (e != 0) {
errno = e;
perror(ifname);
void write_error()
{
int e = errno;
- fprintf(stderr, "\n%s: ", progname);
+ fprintf (stderr, "\n%s: ", program_name);
errno = e;
perror(ofname);
abort_gzip();
putc (*p, file);
}
-/* ========================================================================
- * Semi-safe malloc -- never returns NULL.
- */
-voidp xmalloc (size)
- unsigned size;
-{
- voidp cp = (voidp)malloc (size);
-
- if (cp == NULL) error("out of memory");
- return cp;
-}
-
/* ========================================================================
* Table of CRC-32's of all single-byte values (made by makecrc.c)
*/
projects / debian / gzip / blobdiff