mirror of
https://git.FreeBSD.org/src.git
synced 2024-12-25 11:37:56 +00:00
107 lines
2.5 KiB
C
107 lines
2.5 KiB
C
/* addext.c -- add an extension to a file name
|
|
Copyright (C) 1990, 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 program; see the file COPYING.
|
|
If not, write to the Free Software Foundation,
|
|
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
|
|
|
|
/* Written by David MacKenzie <djm@gnu.ai.mit.edu> and Paul Eggert */
|
|
|
|
#if HAVE_CONFIG_H
|
|
# include <config.h>
|
|
#endif
|
|
|
|
#ifndef HAVE_DOS_FILE_NAMES
|
|
#define HAVE_DOS_FILE_NAMES 0
|
|
#endif
|
|
#ifndef HAVE_LONG_FILE_NAMES
|
|
#define HAVE_LONG_FILE_NAMES 0
|
|
#endif
|
|
|
|
#include <backupfile.h>
|
|
|
|
#if HAVE_LIMITS_H
|
|
# include <limits.h>
|
|
#endif
|
|
#ifndef _POSIX_NAME_MAX
|
|
#define _POSIX_NAME_MAX 14
|
|
#endif
|
|
|
|
#include <sys/types.h>
|
|
#if HAVE_STRING_H
|
|
# include <string.h>
|
|
#else
|
|
# include <strings.h>
|
|
#endif
|
|
|
|
#if HAVE_UNISTD_H
|
|
# include <unistd.h>
|
|
#endif
|
|
|
|
/* Append to FILENAME the extension EXT, unless the result would be too long,
|
|
in which case just append the character E. */
|
|
|
|
void
|
|
addext (filename, ext, e)
|
|
char *filename;
|
|
char const *ext;
|
|
int e;
|
|
{
|
|
char *s = base_name (filename);
|
|
size_t slen = strlen (s), extlen = strlen (ext);
|
|
long slen_max = -1;
|
|
|
|
#if HAVE_PATHCONF && defined _PC_NAME_MAX
|
|
if (slen + extlen <= _POSIX_NAME_MAX && ! HAVE_DOS_FILE_NAMES)
|
|
/* The file name is so short there's no need to call pathconf. */
|
|
slen_max = _POSIX_NAME_MAX;
|
|
else if (s == filename)
|
|
slen_max = pathconf (".", _PC_NAME_MAX);
|
|
else
|
|
{
|
|
char c = *s;
|
|
*s = 0;
|
|
slen_max = pathconf (filename, _PC_NAME_MAX);
|
|
*s = c;
|
|
}
|
|
#endif
|
|
if (slen_max < 0)
|
|
slen_max = HAVE_LONG_FILE_NAMES ? 255 : 14;
|
|
|
|
if (HAVE_DOS_FILE_NAMES && slen_max <= 12)
|
|
{
|
|
/* Live within DOS's 8.3 limit. */
|
|
char *dot = strchr (s, '.');
|
|
if (dot)
|
|
{
|
|
slen -= dot + 1 - s;
|
|
s = dot + 1;
|
|
slen_max = 3;
|
|
}
|
|
else
|
|
slen_max = 8;
|
|
extlen = 9; /* Don't use EXT. */
|
|
}
|
|
|
|
if (slen + extlen <= slen_max)
|
|
strcpy (s + slen, ext);
|
|
else
|
|
{
|
|
if (slen_max <= slen)
|
|
slen = slen_max - 1;
|
|
s[slen] = e;
|
|
s[slen + 1] = 0;
|
|
}
|
|
}
|