160 lines
3.9 KiB
C
160 lines
3.9 KiB
C
/**************************************************************************
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*
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* Tint2 : cache
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*
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* Copyright (C) 2016 @o9000
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License version 2
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* as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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**************************************************************************/
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#include "cache.h"
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <sys/file.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "common.h"
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void init_cache(Cache *cache)
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{
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if (cache->_table)
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free_cache(cache);
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cache->_table = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, g_free);
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cache->dirty = FALSE;
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cache->loaded = FALSE;
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}
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void free_cache(Cache *cache)
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{
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if (cache->_table)
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g_hash_table_destroy(cache->_table);
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cache->_table = NULL;
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cache->dirty = FALSE;
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cache->loaded = FALSE;
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}
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void load_cache(Cache *cache, const gchar *cache_path)
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{
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init_cache(cache);
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cache->loaded = TRUE;
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int fd = open(cache_path, O_RDONLY);
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if (fd == -1)
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return;
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flock(fd, LOCK_SH);
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FILE *f = fopen(cache_path, "rt");
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if (!f)
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goto unlock;
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char *line = NULL;
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size_t line_size;
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while (getline(&line, &line_size, f) >= 0) {
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char *key, *value;
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size_t line_len = strlen(line);
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gboolean has_newline = FALSE;
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if (line_len >= 1) {
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if (line[line_len - 1] == '\n') {
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line[line_len - 1] = '\0';
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line_len--;
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has_newline = TRUE;
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}
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}
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if (!has_newline)
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break;
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if (line_len == 0)
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continue;
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if (parse_line(line, &key, &value)) {
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g_hash_table_insert(cache->_table, g_strdup(key), g_strdup(value));
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free(key);
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free(value);
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}
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}
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free(line);
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fclose(f);
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unlock:
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flock(fd, LOCK_UN);
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close(fd);
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}
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void write_cache_line(gpointer key, gpointer value, gpointer user_data)
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{
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gchar *k = key;
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gchar *v = value;
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FILE *f = user_data;
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fprintf(f, "%s=%s\n", k, v);
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}
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void save_cache(Cache *cache, const gchar *cache_path)
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{
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int fd = open(cache_path, O_RDONLY | O_CREAT, 0600);
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if (fd == -1) {
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gchar *dir_path = g_path_get_dirname(cache_path);
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g_mkdir_with_parents(dir_path, 0700);
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g_free(dir_path);
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fd = open(cache_path, O_RDONLY | O_CREAT, 0600);
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}
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if (fd == -1) {
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fprintf(stderr, RED "Could not save icon theme cache!" RESET "\n");
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return;
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}
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flock(fd, LOCK_EX);
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FILE *f = fopen(cache_path, "w");
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if (!f) {
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fprintf(stderr, RED "Could not save icon theme cache!" RESET "\n");
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goto unlock;
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}
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g_hash_table_foreach(cache->_table, write_cache_line, f);
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fclose(f);
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cache->dirty = FALSE;
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unlock:
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flock(fd, LOCK_UN);
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close(fd);
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}
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const gchar *get_from_cache(Cache *cache, const gchar *key)
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{
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if (!cache->_table)
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return NULL;
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return g_hash_table_lookup(cache->_table, key);
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}
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void add_to_cache(Cache *cache, const gchar *key, const gchar *value)
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{
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if (!cache->_table)
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init_cache(cache);
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if (!key || !value)
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return;
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gchar *old_value = g_hash_table_lookup(cache->_table, key);
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if (old_value && g_str_equal(old_value, value))
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return;
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g_hash_table_insert(cache->_table, g_strdup(key), g_strdup(value));
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cache->dirty = TRUE;
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}
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