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/* dctrl-tools - Debian control file inspection tools
Copyright © 2005 Antti-Juhani Kaijanaho
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 the Free Software Foundation, Inc.,
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
// Marked portions of this file are covered by the following
// copyright:
/*
* libdpkg - Debian packaging suite library routines
* vercmp.c - comparison of version numbers
* utils.c - Helper functions for dpkg
*
* Copyright © 1995 Ian Jackson <ian@chiark.greenend.org.uk>
* Copyright © 2001 Wichert Akkerman <wakkerma@debian.org>
*
* 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 this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include <string.h>
#include "version.h"
/* <<<<<<< originally from dpkg >>>>>>> */
/* Reimplementation of the standard ctype.h is* functions. Since gettext
* has overloaded the meaning of LC_CTYPE we can't use that to force C
* locale, so use these cis* functions instead.
*/
static int cisdigit(int c) {
return (c>='0') && (c<='9');
}
static int cisalpha(int c) {
return ((c>='a') && (c<='z')) || ((c>='A') && (c<='Z'));
}
/* 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);
}
/* <<<<<<< END OF originally from dpkg >>>>>>> */
/* warning: modifies ver by adding nul chars; return pointers point
* inside ver. */
bool parse_version(struct versionrevision *rv, char *ver, size_t len)
{
rv->version = strchr(ver, ':');
if (rv->version == NULL) {
rv->version = ver;
} else {
*(rv->version++) = '\0';
}
rv->revision = strrchr(ver, '-');
if (rv->revision == NULL) {
rv->revision = ver + len;
} else {
*(rv->revision++) = '\0';
}
if (rv->version != ver) {
rv->epoch = 0;
for (char *p = ver; *p != '\0'; p++) {
if (!('0' <= *p && *p <= '9')) return false;
rv->epoch = rv->epoch * 10 + (*p - '0');
}
} else {
rv->epoch = 0;
}
for (char *p = rv->version; *p != '\0'; p++) {
if (('a' <= *p && *p <= 'z') ||
('A' <= *p && *p <= 'Z') ||
('0' <= *p && *p <= '9') ||
*p == '.' ||
*p == '-' ||
*p == '+' ||
*p == ':' ||
*p == '~') continue;
return false;
}
for (char *p = rv->revision; *p != '\0'; p++) {
if (('a' <= *p && *p <= 'z') ||
('A' <= *p && *p <= 'Z') ||
('0' <= *p && *p <= '9') ||
*p == '.' ||
*p == '+' ||
*p == '~') continue;
return false;
}
return true;
}
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