create v0.0.8 branch

[ppastats.git] / src / fcache.c

diff --git a/src/fcache.c b/src/fcache.c
new file mode 100644 (file)
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--- /dev/null
+++ b/src/fcache.c
@@ -0,0 +1,127 @@
+/*
+ * Copyright (C) 2011-2012 jeanfi@gmail.com
+ *
+ * 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#include <libintl.h>
+#define _(String) gettext(String)
+
+#include <libgen.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "fcache.h"
+#include "io.h"
+#include "log.h"
+
+static const char *cache_dir;
+
+static const char *get_cache_dir()
+{
+       char *home;
+
+       if (!cache_dir) {
+               home = getenv("HOME");
+
+               if (home) {
+                       cache_dir = malloc(strlen(home)
+                                          + 1 + strlen(".ppastats/cache")
+                                          + 1);
+                       sprintf((char *)cache_dir,
+                               "%s/%s", home, ".ppastats/cache");
+
+                       mkdirs(cache_dir, 0777);
+               } else {
+                       log_warn(_("$HOME not defined"));
+               }
+       }
+
+       return cache_dir;
+}
+
+static char *key_to_path(const char *key)
+{
+       char *path;
+       const char *dir;
+
+       if (!key || !*key || *key != '/')
+               return NULL;
+
+       dir = get_cache_dir();
+       if (!dir)
+               return NULL;
+
+       path = malloc(strlen(dir) + 1 + strlen(key) + strlen("/data") + 1);
+       sprintf(path, "%s%s.data", dir, key);
+
+       return path;
+}
+
+char *fcache_get(const char *key)
+{
+       char *path, *content;
+
+       path = key_to_path(key);
+       if (!path) {
+               log_err(_("file cache, invalid key: %s"), key);
+               return NULL;
+       }
+
+       content = file_get_content(path);
+
+       if (content)
+               log_debug(_("file cache hit %s"), key);
+       else
+               log_debug(_("file cache miss %s %s"), key, path);
+
+       free(path);
+
+       return content;
+}
+
+void fcache_put(const char *key, const char *value)
+{
+       char *path, *dir, *tmp;
+       FILE *f;
+
+       path = key_to_path(key);
+       if (!path)
+               return ;
+
+       tmp = strdup(path);
+       dir = dirname(tmp);
+       mkdirs(dir, 0777);
+       free(tmp);
+
+       f = fopen(path, "w");
+
+       if (f) {
+               fputs(value, f);
+
+               fclose(f);
+       } else {
+               log_err(_("Failed to open %s"), path);
+       }
+
+       free(path);
+}
+
+void fcache_cleanup()
+{
+       free((char *)cache_dir);
+}