xbps/lib/match.c
Juan RP 9673c4bd09 XBPS major changes in June 2011.
- A configuration file "xbps-conf.plist" replaces the (un)register target
  in xbps-repo(8) and (un)set-prop in xbps-bin(8). For now, you can set
  the repositories and prefered virtual packages.

- New package pattern matching code from NetBSD. Supports more ways of
  matching patterns in packages.

- Multiple bugs fixed in virtual packages related matching code.

--HG--
rename : LICENSE => COPYING
2011-06-04 13:37:53 +02:00

162 lines
3.8 KiB
C

/* $NetBSD: opattern.c,v 1.5 2009/02/02 12:35:01 joerg Exp $ */
/*
* FreeBSD install - a package for the installation and maintainance
* of non-core utilities.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* Jordan K. Hubbard
* 18 July 1993
*
* Miscellaneous string utilities.
*
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fnmatch.h>
#include <ctype.h>
#include <sys/param.h>
#include "xbps_api_impl.h"
/*
* Perform alternate match on "pkg" against "pattern",
* calling pkg_match (recursively) to resolve any other patterns.
* Return 1 on match, 0 otherwise or -1 on error.
*/
static int
alternate_match(const char *pattern, const char *pkg)
{
char *sep;
char buf[PATH_MAX];
char *last;
char *alt;
char *cp;
int cnt;
int found;
if ((sep = strchr(pattern, '{')) == (char *)NULL)
return -1;
(void)strncpy(buf, pattern, (size_t)(sep - pattern));
alt = &buf[sep - pattern];
last = (char *)NULL;
for (cnt = 0, cp = sep; *cp && last == (char *)NULL; cp++) {
if (*cp == '{') {
cnt++;
} else if (*cp == '}' && --cnt == 0 && last == (char *)NULL) {
last = cp + 1;
}
}
if (cnt != 0)
return -1;
for (found = 0, cp = sep + 1; *sep != '}'; cp = sep + 1) {
for (cnt = 0, sep = cp; cnt > 0 || (cnt == 0 && *sep != '}' && *sep != ','); sep++) {
if (*sep == '{') {
cnt++;
} else if (*sep == '}') {
cnt--;
}
}
(void)snprintf(alt, sizeof(buf) - (alt - buf), "%.*s%s", (int)(sep - cp), cp, last);
if (xbps_pkgpattern_match(buf, pkg) == 1)
found = 1;
}
return found;
}
/*
* Perform glob match on "pkg" against "pattern".
* Return 1 on match, 0 otherwise
*/
static int
glob_match(const char *pattern, const char *pkg)
{
return fnmatch(pattern, pkg, FNM_PERIOD) == 0;
}
/*
* Perform simple match on "pkg" against "pattern".
* Return 1 on match, 0 otherwise
*/
static int
simple_match(const char *pattern, const char *pkg)
{
return strcmp(pattern, pkg) == 0;
}
/*
* Performs a fast check if pattern can ever match pkg.
* Returns 1 if a match is possible and 0 otherwise.
*/
static int
quick_pkg_match(const char *pattern, const char *pkg)
{
#define simple(x) (isalnum((unsigned char)(x)) || (x) == '-')
if (!simple(pattern[0]))
return 1;
if (pattern[0] != pkg[0])
return 0;
if (!simple(pattern[1]))
return 1;
if (pattern[1] != pkg[1])
return 0;
return 1;
#undef simple
}
/*
* Match pkg against pattern, return 1 if matching, 0 otherwise or -1 on error.
*/
int
xbps_pkgpattern_match(const char *pkg, const char *pattern)
{
if (!quick_pkg_match(pattern, pkg))
return 0;
if (strchr(pattern, '{') != (char *)NULL) {
/* emulate csh-type alternates */
return alternate_match(pattern, pkg);
}
if (strpbrk(pattern, "<>") != (char *)NULL) {
/* perform relational dewey match on version number */
return dewey_match(pattern, pkg);
}
if (strpbrk(pattern, "*?[]") != (char *)NULL) {
/* glob match */
if (glob_match(pattern, pkg))
return 1;
}
/* no alternate, dewey or glob match -> simple compare */
if (simple_match(pattern, pkg))
return 1;
/* globbing patterns and simple matches may be specified with or
* without the version number, so check for both cases. */
{
char *pattern_ver;
int retval;
pattern_ver = xbps_xasprintf("%s-[0-9]*", pattern);
if (pattern_ver == NULL)
return -1;
retval = glob_match(pattern_ver, pkg);
free(pattern_ver);
return retval;
}
}