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/*
* libdpkg - Debian packaging suite library routines
* deb-version.c - deb format version handling routines
*
* Copyright © 2012-2013 Guillem Jover <guillem@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 of the License, 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, see <https://www.gnu.org/licenses/>.
*/
#include <config.h>
#include <compat.h>
#include <limits.h>
#include <string.h>
#include <stdlib.h>
#include <dpkg/i18n.h>
#include <dpkg/c-ctype.h>
#include <dpkg/dpkg.h>
#include <dpkg/deb-version.h>
/**
* Parse a .deb format version.
*
* It takes a string and parses a .deb archive format version in the form
* of "X.Y", without any leading whitespace, and ending in either a newline
* or a NUL. If there is any syntax error a descriptive error string is
* returned.
*
* @param version The version to return.
* @param str The string to parse.
*
* @return An error string, or NULL if there was no error.
*/
const char *
deb_version_parse(struct deb_version *version, const char *str)
{
const char *str_minor, *end;
unsigned int major = 0;
unsigned int minor = 0;
unsigned int divlimit = INT_MAX / 10;
int modlimit = INT_MAX % 10;
for (end = str; *end && c_isdigit(*end); end++) {
int ord = *end - '0';
if (major > divlimit || (major == divlimit && ord > modlimit))
return _("format version with too big major component");
major = major * 10 + ord;
}
if (end == str)
return _("format version with empty major component");
if (*end != '.')
return _("format version has no dot");
for (end = str_minor = end + 1; *end && c_isdigit(*end); end++) {
int ord = *end - '0';
if (minor > divlimit || (minor == divlimit && ord > modlimit))
return _("format version with too big minor component");
minor = minor * 10 + ord;
}
if (end == str_minor)
return _("format version with empty minor component");
if (*end != '\n' && *end != '\0')
return _("format version followed by junk");
version->major = major;
version->minor = minor;
return NULL;
}
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