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/* $NetBSD: opattern.c,v 1.4.6.2 2008/08/02 20:33:50 joerg Exp $ */
#if HAVE_CONFIG_H
#include "config.h"
#endif
#include <nbcompat.h>
#if HAVE_SYS_CDEFS_H
#include <sys/cdefs.h>
#endif
#ifndef lint
#if 0
static const char *rcsid = "Id: str.c,v 1.5 1997/10/08 07:48:21 charnier Exp";
#else
__RCSID("$NetBSD: opattern.c,v 1.4.6.2 2008/08/02 20:33:50 joerg Exp $");
#endif
#endif
/*
* 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.
*
*/
#if HAVE_ASSERT_H
#include <assert.h>
#endif
#if HAVE_ERR_H
#include <err.h>
#endif
#if HAVE_FNMATCH_H
#include <fnmatch.h>
#endif
#include "lib.h"
#include "dewey.h"
/* pull in definitions and macros for resizing arrays as we go */
#include "defs.h"
/*
* Perform alternate match on "pkg" against "pattern",
* calling pkg_match (recursively) to resolve any other patterns.
* Return 1 on match, 0 otherwise
*/
static int
alternate_match(const char *pattern, const char *pkg)
{
char *sep;
char buf[MaxPathSize];
char *last;
char *alt;
char *cp;
int cnt;
int found;
if ((sep = strchr(pattern, '{')) == (char *) NULL) {
errx(EXIT_FAILURE, "alternate_match(): '{' expected in `%s'", pattern);
}
(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) {
errx(EXIT_FAILURE, "Malformed alternate `%s'", pattern);
}
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 (pkg_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.
*/
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 else
*/
int
pkg_match(const char *pattern, const char *pkg)
{
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) {
int ret;
/* perform relational dewey match on version number */
ret = dewey_match(pattern, pkg);
if (ret < 0)
errx(EXIT_FAILURE, "dewey_match returned error");
return ret;
}
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 = xasprintf("%s-[0-9]*", pattern);
retval = glob_match(pattern_ver, pkg);
free(pattern_ver);
return retval;
}
}
int
pkg_order(const char *pattern, const char *first_pkg, const char *second_pkg)
{
const char *first_version;
const char *second_version;
if (first_pkg == NULL && second_pkg == NULL)
return 0;
if (first_pkg == NULL)
return pkg_match(pattern, second_pkg) ? 2 : 0;
if (second_pkg == NULL)
return pkg_match(pattern, first_pkg) ? 1 : 0;
first_version = strrchr(first_pkg, '-');
second_version = strrchr(second_pkg, '-');
if (first_version == NULL || !pkg_match(pattern, first_pkg))
return pkg_match(pattern, second_pkg) ? 2 : 0;
if (second_version == NULL || !pkg_match(pattern, second_pkg))
return pkg_match(pattern, first_pkg) ? 1 : 0;
if (dewey_cmp(first_version + 1, DEWEY_GT, second_version + 1))
return 1;
else
return 2;
}
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