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-rw-r--r--src/common/ini.c116
1 files changed, 116 insertions, 0 deletions
diff --git a/src/common/ini.c b/src/common/ini.c
new file mode 100644
index 00000000..fed0b187
--- /dev/null
+++ b/src/common/ini.c
@@ -0,0 +1,116 @@
+/*
+ * ini.c
+ *
+ * Copyright (c) 2013-2015 Pacman Development Team <pacman-dev@archlinux.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 <errno.h>
+#include <limits.h>
+#include <string.h> /* strdup */
+
+#include <alpm.h>
+
+#include "ini.h"
+#include "util.h"
+
+/**
+ * @brief Parse a pacman-style INI config file.
+ *
+ * @param file path to the config file
+ * @param cb callback for key/value pairs
+ * @param data caller defined data to be passed to the callback
+ *
+ * @return the callback return value
+ *
+ * @note The callback will be called at the beginning of each section with an
+ * empty key and value and for each key/value pair.
+ *
+ * @note If the parser encounters an error the callback will be called with
+ * section, key, and value set to NULL and errno set by fopen, fgets, or
+ * strdup.
+ *
+ * @note The @a key and @a value passed to @ cb will be overwritten between
+ * calls. The section name will remain valid until after @a cb is called to
+ * begin a new section.
+ *
+ * @note Parsing will immediately stop if the callback returns non-zero.
+ */
+int parse_ini(const char *file, ini_parser_fn cb, void *data)
+{
+ char line[PATH_MAX], *section_name = NULL;
+ FILE *fp = NULL;
+ int linenum = 0;
+ int ret = 0;
+
+ fp = fopen(file, "r");
+ if(fp == NULL) {
+ return cb(file, 0, NULL, NULL, NULL, data);
+ }
+
+ while(safe_fgets(line, PATH_MAX, fp)) {
+ char *key, *value, *ptr;
+ size_t line_len;
+
+ linenum++;
+
+ /* ignore whole line and end of line comments */
+ if((ptr = strchr(line, '#'))) {
+ *ptr = '\0';
+ }
+
+ line_len = strtrim(line);
+
+ if(line_len == 0) {
+ continue;
+ }
+
+ if(line[0] == '[' && line[line_len - 1] == ']') {
+ char *name;
+ /* new config section, skip the '[' */
+ name = strdup(line + 1);
+ name[line_len - 2] = '\0';
+
+ ret = cb(file, linenum, name, NULL, NULL, data);
+ free(section_name);
+ section_name = name;
+
+ /* we're at a new section; perform any post-actions for the prior */
+ if(ret) {
+ goto cleanup;
+ }
+ continue;
+ }
+
+ /* directive */
+ /* strsep modifies the 'line' string: 'key \0 value' */
+ key = line;
+ value = line;
+ strsep(&value, "=");
+ strtrim(key);
+ strtrim(value);
+
+ if((ret = cb(file, linenum, section_name, key, value, data)) != 0) {
+ goto cleanup;
+ }
+ }
+
+cleanup:
+ fclose(fp);
+ free(section_name);
+ return ret;
+}
+
+/* vim: set noet: */