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. */
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
/* David MacKenzie <djm@gnu.ai.mit.edu>.
Some algorithms adapted from GNU Emacs. */
#ifdef HAVE_CONFIG_H
-#if defined (CONFIG_BROKETS)
-/* We use <config.h> instead of "config.h" so that a compilation
- using -I. -I$srcdir will use ./config.h rather than $srcdir/config.h
- (which it would do because it found this file in $srcdir). */
-#include <config.h>
-#else
-#include "config.h"
-#endif
+# include <config.h>
#endif
#include <stdio.h>
#include <ctype.h>
#include <sys/types.h>
#include "backupfile.h"
-#if defined(STDC_HEADERS) || defined(HAVE_STRING_H)
-#include <string.h>
-#ifndef index
-#define index strchr
-#endif
-#ifndef rindex
-#define rindex strrchr
-#endif
+#ifdef HAVE_STRING_H
+# include <string.h>
#else
-#include <strings.h>
+# include <strings.h>
#endif
-#if defined(DIRENT) || defined(_POSIX_VERSION)
-#include <dirent.h>
-#define NLENGTH(direct) (strlen((direct)->d_name))
-#else /* not (DIRENT or _POSIX_VERSION) */
-#define dirent direct
-#define NLENGTH(direct) ((direct)->d_namlen)
-#ifdef SYSNDIR
-#include <sys/ndir.h>
-#endif /* SYSNDIR */
-#ifdef SYSDIR
-#include <sys/dir.h>
-#endif /* SYSDIR */
-#ifdef NDIR
-#include <ndir.h>
-#endif /* NDIR */
-#endif /* DIRENT or _POSIX_VERSION */
-
-#ifdef VOID_CLOSEDIR
+#ifdef HAVE_DIRENT_H
+# include <dirent.h>
+# define NLENGTH(direct) (strlen((direct)->d_name))
+#else /* not HAVE_DIRENT_H */
+# define dirent direct
+# define NLENGTH(direct) ((direct)->d_namlen)
+# ifdef HAVE_SYS_NDIR_H
+# include <sys/ndir.h>
+# endif /* HAVE_SYS_NDIR_H */
+# ifdef HAVE_SYS_DIR_H
+# include <sys/dir.h>
+# endif /* HAVE_SYS_DIR_H */
+# ifdef HAVE_NDIR_H
+# include <ndir.h>
+# endif /* HAVE_NDIR_H */
+#endif /* HAVE_DIRENT_H */
+
+#ifdef CLOSEDIR_VOID
/* Fake a return value. */
-#define CLOSEDIR(d) (closedir (d), 0)
+# define CLOSEDIR(d) (closedir (d), 0)
#else
-#define CLOSEDIR(d) closedir (d)
+# define CLOSEDIR(d) closedir (d)
#endif
#ifdef STDC_HEADERS
-#include <stdlib.h>
+# include <stdlib.h>
#else
char *malloc ();
#endif
-#if !defined (isascii) || defined (STDC_HEADERS)
-#undef isascii
-#define isascii(c) 1
+#if defined (STDC_HEADERS) || (!defined (isascii) && !defined (HAVE_ISASCII))
+# define IN_CTYPE_DOMAIN(c) 1
+#else
+# define IN_CTYPE_DOMAIN(c) isascii(c)
#endif
-#define ISDIGIT(c) (isascii ((unsigned char ) c) \
- && isdigit ((unsigned char) (c)))
+#define ISDIGIT_LOCALE(c) (IN_CTYPE_DOMAIN (c) && isdigit (c))
+
+/* ISDIGIT differs from ISDIGIT_LOCALE, as follows:
+ - Its arg may be any int or unsigned int; it need not be an unsigned char.
+ - It's guaranteed to evaluate its argument exactly once.
+ - It's typically faster.
+ Posix 1003.2-1992 section 2.5.2.1 page 50 lines 1556-1558 says that
+ only '0' through '9' are digits. Prefer ISDIGIT to ISDIGIT_LOCALE unless
+ it's important to use the locale's definition of `digit' even when the
+ host does not conform to Posix. */
+#define ISDIGIT(c) ((unsigned) (c) - '0' <= 9)
#if defined (HAVE_UNISTD_H)
#include <unistd.h>
#if defined (_POSIX_VERSION)
/* POSIX does not require that the d_ino field be present, and some
systems do not provide it. */
-#define REAL_DIR_ENTRY(dp) 1
+# define REAL_DIR_ENTRY(dp) 1
#else
-#define REAL_DIR_ENTRY(dp) ((dp)->d_ino != 0)
+# define REAL_DIR_ENTRY(dp) ((dp)->d_ino != 0)
#endif
/* Which type of backup file names are generated. */
char *
find_backup_file_name (file)
- char *file;
+ const char *file;
{
char *dir;
char *base_versions;
static int
max_backup_version (file, dir)
- char *file, *dir;
+ const char *file;
+ const char *dir;
{
DIR *dirp;
struct dirent *dp;
int highest_version;
int this_version;
- int file_name_length;
+ size_t file_name_length;
dirp = opendir (dir);
if (!dirp)
static char *
make_version_name (file, version)
- char *file;
+ const char *file;
int version;
{
char *backup_name;
static int
version_number (base, backup, base_length)
- char *base;
- char *backup;
+ const char *base;
+ const char *backup;
int base_length;
{
int version;
- char *p;
+ const char *p;
version = 0;
if (!strncmp (base, backup, base_length) && ISDIGIT (backup[base_length]))
static char *
concat (str1, str2)
- char *str1, *str2;
+ const char *str1;
+ const char *str2;
{
char *newstr;
int str1_length = strlen (str1);