/* * cache.c * * Copyright (c) 2002-2007 by Judd Vinet <jvinet@zeroflux.org> * * 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, see <http://www.gnu.org/licenses/>. */ #include "config.h" #include <unistd.h> #include <stdio.h> #include <stdlib.h> #include <errno.h> #include <string.h> /* libalpm */ #include "cache.h" #include "alpm_list.h" #include "log.h" #include "alpm.h" #include "util.h" #include "package.h" #include "group.h" #include "db.h" /* Returns a new package cache from db. * It frees the cache if it already exists. */ int _alpm_db_load_pkgcache(pmdb_t *db) { pmpkg_t *info; int count = 0; ALPM_LOG_FUNC; if(db == NULL) { return(-1); } _alpm_db_free_pkgcache(db); _alpm_log(PM_LOG_DEBUG, "loading package cache for repository '%s'\n", db->treename); _alpm_db_rewind(db); while((info = _alpm_db_scan(db, NULL)) != NULL) { _alpm_log(PM_LOG_FUNCTION, "adding '%s' to package cache for db '%s'\n", alpm_pkg_get_name(info), db->treename); info->origin = PKG_FROM_CACHE; info->origin_data.db = db; /* add to the collection */ db->pkgcache = alpm_list_add(db->pkgcache, info); count++; } db->pkgcache = alpm_list_msort(db->pkgcache, count, _alpm_pkg_cmp); return(0); } void _alpm_db_free_pkgcache(pmdb_t *db) { ALPM_LOG_FUNC; if(db == NULL || db->pkgcache == NULL) { return; } _alpm_log(PM_LOG_DEBUG, "freeing package cache for repository '%s'\n", db->treename); alpm_list_free_inner(db->pkgcache, (alpm_list_fn_free)_alpm_pkg_free); alpm_list_free(db->pkgcache); db->pkgcache = NULL; if(db->grpcache) { _alpm_db_free_grpcache(db); } } alpm_list_t *_alpm_db_get_pkgcache(pmdb_t *db) { ALPM_LOG_FUNC; if(db == NULL) { return(NULL); } if(!db->pkgcache) { _alpm_db_load_pkgcache(db); } /* hmmm, still NULL ?*/ if(!db->pkgcache) { _alpm_log(PM_LOG_DEBUG, "error: pkgcache is NULL for db '%s'\n", db->treename); } return(db->pkgcache); } int _alpm_db_add_pkgincache(pmdb_t *db, pmpkg_t *pkg) { ALPM_LOG_FUNC; if(db == NULL || pkg == NULL) { return(-1); } _alpm_log(PM_LOG_DEBUG, "adding entry '%s' in '%s' cache\n", alpm_pkg_get_name(pkg), db->treename); db->pkgcache = alpm_list_add_sorted(db->pkgcache, pkg, _alpm_pkg_cmp); _alpm_db_free_grpcache(db); return(0); } int _alpm_db_remove_pkgfromcache(pmdb_t *db, pmpkg_t *pkg) { void *vdata; pmpkg_t *data; ALPM_LOG_FUNC; if(db == NULL || pkg == NULL) { return(-1); } _alpm_log(PM_LOG_DEBUG, "removing entry '%s' from '%s' cache\n", alpm_pkg_get_name(pkg), db->treename); db->pkgcache = alpm_list_remove(db->pkgcache, pkg, _alpm_pkg_cmp, &vdata); data = vdata; if(data == NULL) { /* package not found */ _alpm_log(PM_LOG_DEBUG, "cannot remove entry '%s' from '%s' cache: not found\n", alpm_pkg_get_name(pkg), db->treename); return(-1); } _alpm_pkg_free(data); _alpm_db_free_grpcache(db); return(0); } pmpkg_t *_alpm_db_get_pkgfromcache(pmdb_t *db, const char *target) { ALPM_LOG_FUNC; if(db == NULL) { return(NULL); } alpm_list_t *pkgcache = _alpm_db_get_pkgcache(db); if(!pkgcache) { _alpm_log(PM_LOG_DEBUG, "error: failed to get '%s' from NULL pkgcache\n", target); return(NULL); } return(_alpm_pkg_find(target, pkgcache)); } /* Returns a new group cache from db. */ int _alpm_db_load_grpcache(pmdb_t *db) { alpm_list_t *lp; ALPM_LOG_FUNC; if(db == NULL) { return(-1); } if(db->pkgcache == NULL) { _alpm_db_load_pkgcache(db); } _alpm_log(PM_LOG_DEBUG, "loading group cache for repository '%s'\n", db->treename); for(lp = _alpm_db_get_pkgcache(db); lp; lp = lp->next) { const alpm_list_t *i; pmpkg_t *pkg = lp->data; for(i = alpm_pkg_get_groups(pkg); i; i = i->next) { const char *grpname = i->data; alpm_list_t *j; pmgrp_t *grp = NULL; int found = 0; /* first look through the group cache for a group with this name */ for(j = db->grpcache; j; j = j->next) { grp = j->data; if(strcmp(grp->name, grpname) == 0 && !alpm_list_find_ptr(grp->packages, pkg)) { grp->packages = alpm_list_add(grp->packages, pkg); found = 1; break; } } if(found) { continue; } /* we didn't find the group, so create a new one with this name */ grp = _alpm_grp_new(grpname); grp->packages = alpm_list_add(grp->packages, pkg); db->grpcache = alpm_list_add(db->grpcache, grp); } } return(0); } void _alpm_db_free_grpcache(pmdb_t *db) { alpm_list_t *lg; ALPM_LOG_FUNC; if(db == NULL || db->grpcache == NULL) { return; } for(lg = db->grpcache; lg; lg = lg->next) { _alpm_grp_free(lg->data); lg->data = NULL; } FREELIST(db->grpcache); } alpm_list_t *_alpm_db_get_grpcache(pmdb_t *db) { ALPM_LOG_FUNC; if(db == NULL) { return(NULL); } if(db->grpcache == NULL) { _alpm_db_load_grpcache(db); } return(db->grpcache); } pmgrp_t *_alpm_db_get_grpfromcache(pmdb_t *db, const char *target) { alpm_list_t *i; ALPM_LOG_FUNC; if(db == NULL || target == NULL || strlen(target) == 0) { return(NULL); } for(i = _alpm_db_get_grpcache(db); i; i = i->next) { pmgrp_t *info = i->data; if(strcmp(info->name, target) == 0) { return(info); } } return(NULL); } /* vim: set ts=2 sw=2 noet: */