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/*
* libdpkg - Debian packaging suite library routines
* vercmp.c - comparison of version numbers
*
* Copyright © 1995 Ian Jackson <ian@chiark.greenend.org.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 <config.h>
#include <compat.h>
#include <ctype.h>
#include <string.h>
#include <dpkg.h>
#include <dpkg-db.h>
#include "parsedump.h"
int epochsdiffer(const struct versionrevision *a,
const struct versionrevision *b) {
return a->epoch != b->epoch;
}
/* assume ascii; warning: evaluates x multiple times! */
#define order(x) ((x) == '~' ? -1 \
: cisdigit((x)) ? 0 \
: !(x) ? 0 \
: cisalpha((x)) ? (x) \
: (x) + 256)
static int verrevcmp(const char *val, const char *ref) {
if (!val) val= "";
if (!ref) ref= "";
while (*val || *ref) {
int first_diff= 0;
while ( (*val && !cisdigit(*val)) || (*ref && !cisdigit(*ref)) ) {
int vc= order(*val), rc= order(*ref);
if (vc != rc) return vc - rc;
val++; ref++;
}
while ( *val == '0' ) val++;
while ( *ref == '0' ) ref++;
while (cisdigit(*val) && cisdigit(*ref)) {
if (!first_diff) first_diff= *val - *ref;
val++; ref++;
}
if (cisdigit(*val)) return 1;
if (cisdigit(*ref)) return -1;
if (first_diff) return first_diff;
}
return 0;
}
int versioncompare(const struct versionrevision *version,
const struct versionrevision *refversion) {
int r;
if (version->epoch > refversion->epoch) return 1;
if (version->epoch < refversion->epoch) return -1;
r= verrevcmp(version->version,refversion->version); if (r) return r;
return verrevcmp(version->revision,refversion->revision);
}
int versionsatisfied3(const struct versionrevision *it,
const struct versionrevision *ref,
enum depverrel verrel) {
int r;
if (verrel == dvr_none) return 1;
r= versioncompare(it,ref);
switch (verrel) {
case dvr_earlierequal: return r <= 0;
case dvr_laterequal: return r >= 0;
case dvr_earlierstrict: return r < 0;
case dvr_laterstrict: return r > 0;
case dvr_exact: return r == 0;
default:
internerr("unknown depverrel '%d'", verrel);
}
return 0;
}
int versionsatisfied(struct pkginfoperfile *it, struct deppossi *against) {
return versionsatisfied3(&it->version,&against->version,against->verrel);
}
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