mirror of
https://git.code.sf.net/p/quake/newtree
synced 2024-11-23 04:22:09 +00:00
104 lines
2.2 KiB
C
104 lines
2.2 KiB
C
/*
|
|
ver_check.c
|
|
|
|
Version number comparisons
|
|
|
|
Copyright (C) 1995 Ian Jackson <iwj10@cus.cam.ac.uk>
|
|
Copyright (C) 2000 Jeff Teunissen <deek@dusknet.dhs.org>
|
|
|
|
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
|
|
of the License, 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:
|
|
|
|
Free Software Foundation, Inc.
|
|
59 Temple Place - Suite 330
|
|
Boston, MA 02111-1307, USA
|
|
|
|
$Id$
|
|
*/
|
|
|
|
#ifdef HAVE_CONFIG_H
|
|
# include "config.h"
|
|
#endif
|
|
|
|
#include <stdlib.h>
|
|
#include <ctype.h>
|
|
|
|
/*
|
|
ver_compare
|
|
|
|
Compare two ASCII version strings. If the first is greater than the second,
|
|
return a positive number. If the second is greater, return a negative. If
|
|
they are equal, return zero.
|
|
*/
|
|
int
|
|
ver_compare (const char *value, const char *reference)
|
|
{
|
|
const char *valptr, *refptr;
|
|
int vc, rc;
|
|
long vl, rl;
|
|
|
|
if (!value)
|
|
value = "";
|
|
if (!reference)
|
|
reference = "";
|
|
|
|
for (;;) {
|
|
valptr = value;
|
|
while (*valptr && !isdigit ((int) *valptr)) // Scan past any non-digits
|
|
valptr++;
|
|
|
|
refptr = reference;
|
|
while (*refptr && !isdigit ((int) *refptr)) // get past non-digits
|
|
refptr++;
|
|
|
|
for (;;) {
|
|
vc = (value == valptr) ? 0 : *value++;
|
|
rc = (reference == refptr) ? 0 : *reference++;
|
|
|
|
if ((!vc) && (!rc))
|
|
break;
|
|
|
|
if (vc && !isalpha (vc))
|
|
vc += 256; // ASCII charset
|
|
if (rc && !isalpha (rc))
|
|
rc += 256;
|
|
|
|
if (vc != rc)
|
|
return (vc - rc);
|
|
}
|
|
|
|
value = valptr;
|
|
reference = refptr;
|
|
|
|
vl = rl = 0;
|
|
|
|
if (isdigit ((int) *valptr))
|
|
vl = strtol (value, (char **) &value, 10);
|
|
|
|
if (isdigit ((int) *refptr))
|
|
rl = strtol (reference, (char **) &reference, 10);
|
|
|
|
if (vl != rl)
|
|
return (vl - rl);
|
|
|
|
if ((!*value) && (!*reference))
|
|
return 0;
|
|
|
|
if (!*value)
|
|
return -1;
|
|
|
|
if (!*reference)
|
|
return 1;
|
|
}
|
|
}
|