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. */
+ Some algorithms adapted from GNU Emacs. */
+
+#if HAVE_CONFIG_H
+# 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>
-#define index strchr
-#define rindex strrchr
+#if HAVE_STRING_H
+# include <string.h>
+#else
+# include <strings.h>
+#endif
+
+#if HAVE_DIRENT_H
+# include <dirent.h>
+# define NLENGTH(Direct) (strlen((Direct)->d_name))
#else
-#include <strings.h>
+# define dirent direct
+# define NLENGTH(Direct) ((Direct)->d_namlen)
+# if HAVE_SYS_NDIR_H
+# include <sys/ndir.h>
+# endif
+# if HAVE_SYS_DIR_H
+# include <sys/dir.h>
+# endif
+# if HAVE_NDIR_H
+# include <ndir.h>
+# endif
#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
-/* Fake a return value. */
-#define CLOSEDIR(d) (closedir (d), 0)
+#if CLOSEDIR_VOID
+/* Fake a return value. */
+# define CLOSEDIR(d) (closedir (d), 0)
#else
-#define CLOSEDIR(d) closedir (d)
+# define CLOSEDIR(d) closedir (d)
#endif
-#ifdef STDC_HEADERS
-#include <stdlib.h>
+#if STDC_HEADERS
+# 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(Char) 1
+#else
+# define IN_CTYPE_DOMAIN(Char) isascii(Char)
#endif
-#define ISDIGIT(c) (isascii ((unsigned char ) c) \
- && isdigit ((unsigned char) (c)))
+#define ISDIGIT(Char) (IN_CTYPE_DOMAIN ((unsigned char) (Char)) \
+ && isdigit ((unsigned char) (Char)))
-#if defined (HAVE_UNISTD_H)
-#include <unistd.h>
+#if HAVE_UNISTD_H
+# include <unistd.h>
#endif
-#if defined (_POSIX_VERSION)
+#ifdef _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
+ systems do not provide it. */
+# 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. */
+/* Which type of backup file names are generated. */
enum backup_type backup_type = none;
/* The extension added to file names to produce a simple (as opposed
- to numbered) backup file name. */
+ to numbered) backup file name. */
char *simple_backup_suffix = "~";
char *basename ();
/* Return the name of the new backup file for file FILE,
allocated with malloc. Return 0 if out of memory.
FILE must not end with a '/' unless it is the root directory.
- Do not call this function if backup_type == none. */
+ Do not call this function if backup_type == none. */
char *
find_backup_file_name (file)
- char *file;
+ const char *file;
{
char *dir;
char *base_versions;
/* Return the number of the highest-numbered backup file for file
FILE in directory DIR. If there are no numbered backups
of FILE in DIR, or an error occurs reading DIR, return 0.
- FILE should already have ".~" appended to it. */
+ FILE should already have ".~" appended to it. */
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)
return 0;
-
+
highest_version = 0;
file_name_length = strlen (file);
{
if (!REAL_DIR_ENTRY (dp) || NLENGTH (dp) <= file_name_length)
continue;
-
+
this_version = version_number (file, dp->d_name, file_name_length);
if (this_version > highest_version)
highest_version = this_version;
}
/* Return a string, allocated with malloc, containing
- "FILE.~VERSION~". Return 0 if out of memory. */
+ "FILE.~VERSION~". Return 0 if out of memory. */
static char *
make_version_name (file, version)
- char *file;
+ const char *file;
int version;
{
char *backup_name;
/* If BACKUP is a numbered backup of BASE, return its version number;
otherwise return 0. BASE_LENGTH is the length of BASE.
- BASE should already have ".~" appended to it. */
+ BASE should already have ".~" appended to it. */
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]))
{
}
/* Return the newly-allocated concatenation of STR1 and STR2.
- If out of memory, return 0. */
+ If out of memory, return 0. */
static char *
concat (str1, str2)
- char *str1, *str2;
+ const char *str1;
+ const char *str2;
{
char *newstr;
- char str1_length = strlen (str1);
+ int str1_length = strlen (str1);
newstr = malloc (str1_length + strlen (str2) + 1);
if (newstr == 0)