117 lines
2.9 KiB
C
117 lines
2.9 KiB
C
/*
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* ini.c
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*
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* Copyright (c) 2013-2016 Pacman Development Team <pacman-dev@archlinux.org>
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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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*
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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, see <http://www.gnu.org/licenses/>.
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*/
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#include <errno.h>
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#include <limits.h>
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#include <string.h> /* strdup */
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#include <alpm.h>
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#include "ini.h"
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#include "util.h"
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/**
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* @brief Parse a pacman-style INI config file.
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*
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* @param file path to the config file
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* @param cb callback for key/value pairs
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* @param data caller defined data to be passed to the callback
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*
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* @return the callback return value
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*
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* @note The callback will be called at the beginning of each section with an
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* empty key and value and for each key/value pair.
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*
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* @note If the parser encounters an error the callback will be called with
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* section, key, and value set to NULL and errno set by fopen, fgets, or
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* strdup.
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*
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* @note The @a key and @a value passed to @ cb will be overwritten between
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* calls. The section name will remain valid until after @a cb is called to
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* begin a new section.
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*
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* @note Parsing will immediately stop if the callback returns non-zero.
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*/
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int parse_ini(const char *file, ini_parser_fn cb, void *data)
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{
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char line[PATH_MAX], *section_name = NULL;
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FILE *fp = NULL;
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int linenum = 0;
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int ret = 0;
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fp = fopen(file, "r");
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if(fp == NULL) {
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return cb(file, 0, NULL, NULL, NULL, data);
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}
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while(safe_fgets(line, PATH_MAX, fp)) {
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char *key, *value, *ptr;
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size_t line_len;
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linenum++;
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/* ignore whole line and end of line comments */
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if((ptr = strchr(line, '#'))) {
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*ptr = '\0';
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}
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line_len = strtrim(line);
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if(line_len == 0) {
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continue;
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}
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if(line[0] == '[' && line[line_len - 1] == ']') {
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char *name;
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/* new config section, skip the '[' */
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name = strdup(line + 1);
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name[line_len - 2] = '\0';
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ret = cb(file, linenum, name, NULL, NULL, data);
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free(section_name);
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section_name = name;
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/* we're at a new section; perform any post-actions for the prior */
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if(ret) {
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goto cleanup;
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}
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continue;
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}
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/* directive */
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/* strsep modifies the 'line' string: 'key \0 value' */
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key = line;
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value = line;
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strsep(&value, "=");
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strtrim(key);
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strtrim(value);
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if((ret = cb(file, linenum, section_name, key, value, data)) != 0) {
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goto cleanup;
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}
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}
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cleanup:
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fclose(fp);
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free(section_name);
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return ret;
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}
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/* vim: set noet: */
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