pkgconf/cache.c

79 lines
1.5 KiB
C
Raw Normal View History

2013-02-25 23:36:09 +00:00
/*
* cache.c
* package object cache
*
* Copyright (c) 2013 pkgconf authors (see AUTHORS).
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* This software is provided 'as is' and without any warranty, express or
* implied. In no event shall the authors be liable for any damages arising
* from the use of this software.
*/
#include "pkg.h"
static pkg_t *pkg_cache = NULL;
/*
* pkg_cache_lookup(id)
*
* looks up a package in the cache given an 'id' atom,
* such as 'gtk+-3.0' and returns the already loaded version
* if present.
*/
pkg_t *
pkg_cache_lookup(const char *id)
{
pkg_t *pkg;
PKG_FOREACH_LIST_ENTRY(pkg_cache, pkg)
{
if (!strcmp(pkg->id, id))
return pkg;
}
return NULL;
}
/*
* pkg_cache_add(pkg)
*
* adds an entry for the package to the package cache.
* the cache entry must be removed if the package is freed.
*/
void
pkg_cache_add(pkg_t *pkg)
{
pkg->next = pkg_cache;
pkg_cache = pkg;
if (pkg->next != NULL)
pkg->next->prev = pkg;
}
/*
2013-02-26 04:40:30 +00:00
* pkg_cache_remove(pkg)
2013-02-25 23:36:09 +00:00
*
* deletes a package from the cache entry.
*/
void
2013-02-26 04:40:30 +00:00
pkg_cache_remove(pkg_t *pkg)
2013-02-25 23:36:09 +00:00
{
if (pkg->prev != NULL)
pkg->prev->next = pkg->next;
if (pkg->next != NULL)
pkg->next->prev = pkg->prev;
if (pkg == pkg_cache)
{
if (pkg->prev != NULL)
pkg_cache = pkg->prev;
else
pkg_cache = pkg->next;
}
}