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/*
* libdpkg - Debian packaging suite library routines
* vercmp.c - comparison of version numbers
*
* Copyright (C) 1995 Ian Jackson <iwj10@cus.cam.ac.uk>
*
* This 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 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 dpkg; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
#include <ctype.h>
#include <string.h>
#include "config.h"
#include "dpkg.h"
#include "dpkg-db.h"
#include "parsedump.h"
static int verrevcmp(const char *val, const char *ref) {
int vc, rc;
long vl, rl;
const char *vp, *rp;
if (!val) val= "";
if (!ref) ref= "";
for (;;) {
vp= val; while (*vp && !isdigit(*vp)) vp++;
rp= ref; while (*rp && !isdigit(*rp)) rp++;
for (;;) {
vc= val == vp ? 0 : *val++;
rc= ref == rp ? 0 : *ref++;
if (!rc && !vc) break;
if (vc && !isalpha(vc)) vc += 256; /* assumes ASCII character set */
if (rc && !isalpha(rc)) rc += 256;
if (vc != rc) return vc - rc;
}
val= vp;
ref= rp;
vl=0; if (isdigit(*vp)) vl= strtol(val,(char**)&val,10);
rl=0; if (isdigit(*rp)) rl= strtol(ref,(char**)&ref,10);
if (vl != rl) return vl - rl;
if (!*val && !*ref) return 0;
if (!*val) return -1;
if (!*ref) return +1;
}
}
int versioncompare(const char *version, const char *revision,
const char *refversion, const char *refrevision) {
int r;
r= verrevcmp(version,refversion); if (r) return r;
return verrevcmp(revision,refrevision);
}
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