484 lines
10 KiB
C
484 lines
10 KiB
C
/*
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* $Id$
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*
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* Copyright (C) 2002
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* Antti Tapaninen <aet@cc.hut.fi>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2.1 of the License, or (at your option) any later version.
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*
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* This library 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 GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifdef HAVE_CONFIG_H
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#include <config.h>
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#endif
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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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#ifndef _WIN32
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#include <strings.h>
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#else
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#define strcasecmp stricmp
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#endif
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#include <ctype.h>
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#include "scconf.h"
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scconf_context *scconf_new(const char *filename)
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{
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scconf_context *config;
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config = (scconf_context *) malloc(sizeof(scconf_context));
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if (!config) {
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return NULL;
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}
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memset(config, 0, sizeof(scconf_context));
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config->filename = filename ? strdup(filename) : NULL;
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config->root = (scconf_block *) malloc(sizeof(scconf_block));
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if (!config->root) {
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if (config->filename) {
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free(config->filename);
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}
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free(config);
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return NULL;
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}
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memset(config->root, 0, sizeof(scconf_block));
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return config;
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}
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void scconf_free(scconf_context * config)
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{
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if (config) {
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scconf_block_destroy(config->root);
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if (config->filename) {
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free(config->filename);
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}
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free(config);
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}
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config = NULL;
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}
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const scconf_block *scconf_find_block(scconf_context * config, const scconf_block * block, const char *item_name)
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{
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scconf_item *item;
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if (!block) {
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block = config->root;
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}
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if (!item_name) {
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return NULL;
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}
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for (item = block->items; item; item = item->next) {
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if (item->type == SCCONF_ITEM_TYPE_BLOCK &&
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strcasecmp(item_name, item->key) == 0) {
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return item->value.block;
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}
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}
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return NULL;
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}
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scconf_block **scconf_find_blocks(scconf_context * config, const scconf_block * block, const char *item_name, const char *key)
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{
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scconf_block **blocks = NULL;
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int alloc_size, size;
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scconf_item *item;
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if (!block) {
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block = config->root;
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}
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if (!item_name) {
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return NULL;
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}
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size = 0;
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alloc_size = 10;
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blocks = (scconf_block **) realloc(blocks, sizeof(scconf_block *) * alloc_size);
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for (item = block->items; item; item = item->next) {
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if (item->type == SCCONF_ITEM_TYPE_BLOCK &&
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strcasecmp(item_name, item->key) == 0) {
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if (key && strcasecmp(key, item->value.block->name->data)) {
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continue;
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}
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if (size + 1 >= alloc_size) {
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alloc_size *= 2;
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blocks = (scconf_block **) realloc(blocks, sizeof(scconf_block *) * alloc_size);
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}
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blocks[size++] = item->value.block;
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}
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}
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blocks[size] = NULL;
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return blocks;
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}
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const scconf_list *scconf_find_list(const scconf_block * block, const char *option)
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{
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scconf_item *item;
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if (!block) {
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return NULL;
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}
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for (item = block->items; item; item = item->next) {
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if (item->type == SCCONF_ITEM_TYPE_VALUE &&
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strcasecmp(option, item->key) == 0) {
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return item->value.list;
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}
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}
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return NULL;
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}
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const char *scconf_get_str(const scconf_block * block, const char *option, const char *def)
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{
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const scconf_list *list;
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list = scconf_find_list(block, option);
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return !list ? def : list->data;
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}
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int scconf_get_int(const scconf_block * block, const char *option, int def)
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{
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const scconf_list *list;
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list = scconf_find_list(block, option);
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return !list ? def : atoi(list->data);
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}
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int scconf_get_bool(const scconf_block * block, const char *option, int def)
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{
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const scconf_list *list;
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list = scconf_find_list(block, option);
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if (!list) {
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return def;
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}
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return toupper((int) *list->data) == 'T' || toupper((int) *list->data) == 'Y';
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}
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void scconf_block_destroy(scconf_block * block);
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static void scconf_items_destroy(scconf_item * items)
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{
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scconf_item *next;
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while (items) {
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next = items->next;
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switch (items->type) {
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case SCCONF_ITEM_TYPE_COMMENT:
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if (items->value.comment) {
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free(items->value.comment);
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}
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items->value.comment = NULL;
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break;
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case SCCONF_ITEM_TYPE_BLOCK:
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scconf_block_destroy(items->value.block);
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break;
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case SCCONF_ITEM_TYPE_VALUE:
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scconf_list_destroy(items->value.list);
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break;
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}
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if (items->key) {
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free(items->key);
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}
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items->key = NULL;
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free(items);
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items = next;
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}
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}
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void scconf_block_destroy(scconf_block * block)
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{
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if (block) {
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scconf_list_destroy(block->name);
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scconf_items_destroy(block->items);
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free(block);
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}
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}
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scconf_list *scconf_list_add(scconf_list ** list, const char *value)
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{
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scconf_list *rec, **tmp;
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rec = (scconf_list *) malloc(sizeof(scconf_list));
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if (!rec) {
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return NULL;
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}
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memset(rec, 0, sizeof(scconf_list));
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rec->data = value ? strdup(value) : NULL;
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if (!*list) {
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*list = rec;
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} else {
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for (tmp = list; *tmp; tmp = &(*tmp)->next);
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*tmp = rec;
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}
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return rec;
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}
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void scconf_list_destroy(scconf_list * list)
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{
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scconf_list *next;
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while (list) {
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next = list->next;
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if (list->data) {
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free(list->data);
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}
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free(list);
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list = next;
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}
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}
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int scconf_list_array_length(const scconf_list * list)
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{
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int len = 0;
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while (list) {
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len++;
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list = list->next;
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}
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return len;
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}
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int scconf_list_strings_length(const scconf_list * list)
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{
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int len = 0;
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while (list && list->data) {
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len += strlen(list->data) + 1;
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list = list->next;
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}
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return len;
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}
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char *scconf_list_strdup(const scconf_list * list, const char *filler)
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{
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char *buf = NULL;
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int len = 0;
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if (!list) {
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return NULL;
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}
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len = scconf_list_strings_length(list);
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if (filler) {
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len += scconf_list_array_length(list) * (strlen(filler) + 1);
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}
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buf = (char *) malloc(len);
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if (!buf) {
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return NULL;
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}
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memset(buf, 0, len);
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while (list && list->data) {
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strcat(buf, list->data);
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if (filler) {
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strcat(buf, filler);
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}
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list = list->next;
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}
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if (filler)
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buf[strlen(buf) - strlen(filler)] = '\0';
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return buf;
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}
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static int parse_entries(scconf_context * config, const scconf_block * block, scconf_entry * entry, int depth);
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static int parse_type(scconf_context * config, const scconf_block * block, scconf_entry * entry, int depth)
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{
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void *parm = entry->parm;
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int (*callback_func) (scconf_context * config, const scconf_block * block, scconf_entry * entry, int depth) =
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(int (*)(scconf_context *, const scconf_block *, scconf_entry *, int)) parm;
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size_t *len = (size_t *) entry->arg;
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int r = 0;
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if (config->debug) {
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fprintf(stderr, "decoding '%s'\n", entry->name);
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}
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switch (entry->type) {
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case SCCONF_CALLBACK:
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if (parm) {
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r = callback_func(config, block, entry, depth);
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}
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break;
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case SCCONF_BLOCK:
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if (parm) {
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r = parse_entries(config, block, (scconf_entry *) parm, depth + 1);
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}
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break;
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case SCCONF_LIST:
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{
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const scconf_list *val = scconf_find_list(block, entry->name);
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if (!val) {
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r = 1;
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break;
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}
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if (parm) {
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if (entry->flags & SCCONF_ALLOC) {
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scconf_list *dest = NULL;
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for (; val != NULL; val = val->next) {
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if (!scconf_list_add(&dest, val->data)) {
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r = 1;
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break;
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}
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}
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*((scconf_list **) parm) = dest;
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} else {
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*((const scconf_list **) parm) = val;
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}
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}
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if (entry->flags & SCCONF_VERBOSE) {
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char *buf = scconf_list_strdup(val, ", ");
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printf("%s = %s\n", entry->name, buf);
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free(buf);
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}
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}
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break;
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case SCCONF_BOOLEAN:
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{
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int val = scconf_get_bool(block, entry->name, 0);
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if (parm) {
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*((int *) parm) = val;
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}
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if (entry->flags & SCCONF_VERBOSE) {
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printf("%s = %s\n", entry->name, val == 0 ? "false" : "true");
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}
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}
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break;
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case SCCONF_INTEGER:
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{
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int val = scconf_get_int(block, entry->name, 42);
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if (parm) {
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*((int *) parm) = val;
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}
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if (entry->flags & SCCONF_VERBOSE) {
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printf("%s = %i\n", entry->name, val);
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}
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}
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break;
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case SCCONF_STRING:
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{
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const char *val = scconf_get_str(block, entry->name, NULL);
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int vallen = val ? strlen(val) : 0;
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if (!vallen) {
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r = 1;
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break;
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}
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if (parm) {
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if (entry->flags & SCCONF_ALLOC) {
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char **buf = (char **) parm;
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*buf = (char *) malloc(vallen + 1);
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if (*buf == NULL) {
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r = 1;
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break;
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}
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memset(*buf, 0, vallen + 1);
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if (len) {
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*len = vallen;
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}
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parm = *buf;
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}
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memcpy((char *) parm, val, vallen);
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}
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if (entry->flags & SCCONF_VERBOSE) {
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printf("%s = %s\n", entry->name, val);
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}
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}
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break;
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default:
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fprintf(stderr, "invalid configuration type: %d\n", entry->type);
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}
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if (r) {
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fprintf(stderr, "decoding of configuration entry '%s' failed.\n", entry->name);
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return r;
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}
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entry->flags |= SCCONF_PRESENT;
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return 0;
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}
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static scconf_block **getblocks(scconf_context * config, const scconf_block * block, scconf_entry * entry)
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{
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scconf_block **blocks = NULL;
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blocks = scconf_find_blocks(config, block, entry->name, NULL);
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if (blocks) {
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if (blocks[0] != NULL) {
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if (config->debug) {
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fprintf(stderr, "block found (%s)\n", entry->name);
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}
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return blocks;
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}
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free(blocks);
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blocks = NULL;
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}
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if (scconf_find_list(block, entry->name) != NULL) {
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if (config->debug) {
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fprintf(stderr, "list found (%s)\n", entry->name);
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}
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blocks = (scconf_block **) realloc(blocks, sizeof(scconf_block *) * 2);
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if (!blocks)
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return NULL;
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blocks[0] = (scconf_block *) block;
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blocks[1] = NULL;
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}
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return blocks;
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}
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static int parse_entries(scconf_context * config, const scconf_block * block, scconf_entry * entry, int depth)
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{
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int r, i, idx;
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scconf_entry *e;
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scconf_block **blocks = NULL;
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if (config->debug) {
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fprintf(stderr, "parse_entries called, depth %d\n", depth);
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}
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for (idx = 0; entry[idx].name; idx++) {
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e = &entry[idx];
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r = 0;
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blocks = getblocks(config, block, e);
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if (!blocks) {
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if (!(e->flags & SCCONF_MANDATORY)) {
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if (config->debug)
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fprintf(stderr, "optional configuration entry '%s' not present\n",
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e->name);
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continue;
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}
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fprintf(stderr, "mandatory configuration entry '%s' not found\n", e->name);
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return 1;
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}
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for (i = 0; blocks[i]; i++) {
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r = parse_type(config, blocks[i], e, depth);
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if (r) {
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free(blocks);
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return r;
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}
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if (!(e->flags & SCCONF_ALL_BLOCKS))
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break;
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}
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free(blocks);
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}
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return 0;
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}
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int scconf_parse_entries(scconf_context * config, const scconf_block * block, scconf_entry * entry)
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{
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if (!entry)
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return 1;
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if (!block)
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block = config->root;
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return parse_entries(config, block, entry, 0);
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}
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