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mpd/src/conf.c
Max Kellermann 6fbdc721d9 fix -Wconst warnings 
[ew: cleaned up the dirty union hack a bit]
Signed-off-by: Eric Wong <normalperson@yhbt.net>

git-svn-id: https://svn.musicpd.org/mpd/trunk@7180 09075e82-0dd4-0310-85a5-a0d7c8717e4f
2008-02-05 10:17:33 +00:00

436 lines
11 KiB
C
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/* the Music Player Daemon (MPD)
* Copyright (C) 2003-2007 by Warren Dukes (warren.dukes@gmail.com)
* This project's homepage is: http://www.musicpd.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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include "conf.h"
#include "log.h"
#include "utils.h"
#include "buffer2array.h"
#include "list.h"
#include "path.h"
#include "os_compat.h"
#define MAX_STRING_SIZE MPD_PATH_MAX+80
#define CONF_COMMENT '#'
#define CONF_BLOCK_BEGIN "{"
#define CONF_BLOCK_END "}"
#define CONF_REPEATABLE_MASK 0x01
#define CONF_BLOCK_MASK 0x02
#define CONF_LINE_TOKEN_MAX 3
typedef struct _configEntry {
unsigned char mask;
List *configParamList;
} ConfigEntry;
static List *configEntriesList;
static int get_bool(const char *value)
{
const char **x;
static const char *t[] = { "yes", "true", "1", NULL };
static const char *f[] = { "no", "false", "0", NULL };
for (x = t; *x; x++) {
if (!strcasecmp(*x, value))
return 1;
}
for (x = f; *x; x++) {
if (!strcasecmp(*x, value))
return 0;
}
return CONF_BOOL_INVALID;
}
static ConfigParam *newConfigParam(char *value, int line)
{
ConfigParam *ret = xmalloc(sizeof(ConfigParam));
if (!value)
ret->value = NULL;
else
ret->value = xstrdup(value);
ret->line = line;
ret->numberOfBlockParams = 0;
ret->blockParams = NULL;
return ret;
}
static void freeConfigParam(ConfigParam * param)
{
int i;
if (param->value)
free(param->value);
for (i = 0; i < param->numberOfBlockParams; i++) {
if (param->blockParams[i].name) {
free(param->blockParams[i].name);
}
if (param->blockParams[i].value) {
free(param->blockParams[i].value);
}
}
if (param->numberOfBlockParams)
free(param->blockParams);
free(param);
}
static ConfigEntry *newConfigEntry(int repeatable, int block)
{
ConfigEntry *ret = xmalloc(sizeof(ConfigEntry));
ret->mask = 0;
ret->configParamList =
makeList((ListFreeDataFunc *) freeConfigParam, 1);
if (repeatable)
ret->mask |= CONF_REPEATABLE_MASK;
if (block)
ret->mask |= CONF_BLOCK_MASK;
return ret;
}
static void freeConfigEntry(ConfigEntry * entry)
{
freeList(entry->configParamList);
free(entry);
}
static void registerConfigParam(const char *name, int repeatable, int block)
{
ConfigEntry *entry;
if (findInList(configEntriesList, name, NULL))
FATAL("config parameter \"%s\" already registered\n", name);
entry = newConfigEntry(repeatable, block);
insertInList(configEntriesList, name, entry);
}
void finishConf(void)
{
freeList(configEntriesList);
}
void initConf(void)
{
configEntriesList = makeList((ListFreeDataFunc *) freeConfigEntry, 1);
/* registerConfigParam(name, repeatable, block); */
registerConfigParam(CONF_MUSIC_DIR, 0, 0);
registerConfigParam(CONF_PLAYLIST_DIR, 0, 0);
registerConfigParam(CONF_DB_FILE, 0, 0);
registerConfigParam(CONF_LOG_FILE, 0, 0);
registerConfigParam(CONF_ERROR_FILE, 0, 0);
registerConfigParam(CONF_PID_FILE, 0, 0);
registerConfigParam(CONF_STATE_FILE, 0, 0);
registerConfigParam(CONF_USER, 0, 0);
registerConfigParam(CONF_BIND_TO_ADDRESS, 1, 0);
registerConfigParam(CONF_PORT, 0, 0);
registerConfigParam(CONF_LOG_LEVEL, 0, 0);
registerConfigParam(CONF_ZEROCONF_NAME, 0, 0);
registerConfigParam(CONF_ZEROCONF_ENABLED, 0, 0);
registerConfigParam(CONF_PASSWORD, 1, 0);
registerConfigParam(CONF_DEFAULT_PERMS, 0, 0);
registerConfigParam(CONF_AUDIO_OUTPUT, 1, 1);
registerConfigParam(CONF_AUDIO_OUTPUT_FORMAT, 0, 0);
registerConfigParam(CONF_MIXER_TYPE, 0, 0);
registerConfigParam(CONF_MIXER_DEVICE, 0, 0);
registerConfigParam(CONF_MIXER_CONTROL, 0, 0);
registerConfigParam(CONF_REPLAYGAIN, 0, 0);
registerConfigParam(CONF_REPLAYGAIN_PREAMP, 0, 0);
registerConfigParam(CONF_VOLUME_NORMALIZATION, 0, 0);
registerConfigParam(CONF_SAMPLERATE_CONVERTER, 0, 0);
registerConfigParam(CONF_AUDIO_BUFFER_SIZE, 0, 0);
registerConfigParam(CONF_BUFFER_BEFORE_PLAY, 0, 0);
registerConfigParam(CONF_HTTP_BUFFER_SIZE, 0, 0);
registerConfigParam(CONF_HTTP_PREBUFFER_SIZE, 0, 0);
registerConfigParam(CONF_HTTP_PROXY_HOST, 0, 0);
registerConfigParam(CONF_HTTP_PROXY_PORT, 0, 0);
registerConfigParam(CONF_HTTP_PROXY_USER, 0, 0);
registerConfigParam(CONF_HTTP_PROXY_PASSWORD, 0, 0);
registerConfigParam(CONF_CONN_TIMEOUT, 0, 0);
registerConfigParam(CONF_MAX_CONN, 0, 0);
registerConfigParam(CONF_MAX_PLAYLIST_LENGTH, 0, 0);
registerConfigParam(CONF_MAX_COMMAND_LIST_SIZE, 0, 0);
registerConfigParam(CONF_MAX_OUTPUT_BUFFER_SIZE, 0, 0);
registerConfigParam(CONF_FS_CHARSET, 0, 0);
registerConfigParam(CONF_ID3V1_ENCODING, 0, 0);
registerConfigParam(CONF_METADATA_TO_USE, 0, 0);
registerConfigParam(CONF_SAVE_ABSOLUTE_PATHS, 0, 0);
registerConfigParam(CONF_GAPLESS_MP3_PLAYBACK, 0, 0);
}
static void addBlockParam(ConfigParam * param, char *name, char *value,
int line)
{
param->numberOfBlockParams++;
param->blockParams = xrealloc(param->blockParams,
param->numberOfBlockParams *
sizeof(BlockParam));
param->blockParams[param->numberOfBlockParams - 1].name = xstrdup(name);
param->blockParams[param->numberOfBlockParams - 1].value =
xstrdup(value);
param->blockParams[param->numberOfBlockParams - 1].line = line;
}
static ConfigParam *readConfigBlock(FILE * fp, int *count, char *string)
{
ConfigParam *ret = newConfigParam(NULL, *count);
int i;
int numberOfArgs;
int argsMinusComment;
while (myFgets(string, MAX_STRING_SIZE, fp)) {
char *array[CONF_LINE_TOKEN_MAX] = { NULL };
(*count)++;
numberOfArgs = buffer2array(string, array, CONF_LINE_TOKEN_MAX);
for (i = 0; i < numberOfArgs; i++) {
if (array[i][0] == CONF_COMMENT)
break;
}
argsMinusComment = i;
if (0 == argsMinusComment) {
continue;
}
if (1 == argsMinusComment &&
0 == strcmp(array[0], CONF_BLOCK_END)) {
break;
}
if (2 != argsMinusComment) {
FATAL("improperly formatted config file at line %i:"
" %s\n", *count, string);
}
if (0 == strcmp(array[0], CONF_BLOCK_BEGIN) ||
0 == strcmp(array[1], CONF_BLOCK_BEGIN) ||
0 == strcmp(array[0], CONF_BLOCK_END) ||
0 == strcmp(array[1], CONF_BLOCK_END)) {
FATAL("improperly formatted config file at line %i: %s\n"
"in block beginning at line %i\n",
*count, string, ret->line);
}
addBlockParam(ret, array[0], array[1], *count);
}
return ret;
}
void readConf(const char *file)
{
FILE *fp;
char string[MAX_STRING_SIZE + 1];
int i;
int numberOfArgs;
int argsMinusComment;
int count = 0;
ConfigEntry *entry;
void *voidPtr;
ConfigParam *param;
if (!(fp = fopen(file, "r"))) {
FATAL("problems opening file %s for reading: %s\n", file,
strerror(errno));
}
while (myFgets(string, MAX_STRING_SIZE, fp)) {
char *array[CONF_LINE_TOKEN_MAX] = { NULL };
count++;
numberOfArgs = buffer2array(string, array, CONF_LINE_TOKEN_MAX);
for (i = 0; i < numberOfArgs; i++) {
if (array[i][0] == CONF_COMMENT)
break;
}
argsMinusComment = i;
if (0 == argsMinusComment) {
continue;
}
if (2 != argsMinusComment) {
FATAL("improperly formatted config file at line %i:"
" %s\n", count, string);
}
if (!findInList(configEntriesList, array[0], &voidPtr)) {
FATAL("unrecognized parameter in config file at line "
"%i: %s\n", count, string);
}
entry = (ConfigEntry *) voidPtr;
if (!(entry->mask & CONF_REPEATABLE_MASK) &&
entry->configParamList->numberOfNodes) {
param = entry->configParamList->firstNode->data;
FATAL("config parameter \"%s\" is first defined on line "
"%i and redefined on line %i\n", array[0],
param->line, count);
}
if (entry->mask & CONF_BLOCK_MASK) {
if (0 != strcmp(array[1], CONF_BLOCK_BEGIN)) {
FATAL("improperly formatted config file at "
"line %i: %s\n", count, string);
}
param = readConfigBlock(fp, &count, string);
} else
param = newConfigParam(array[1], count);
insertInListWithoutKey(entry->configParamList, param);
}
fclose(fp);
}
ConfigParam *getNextConfigParam(const char *name, ConfigParam * last)
{
void *voidPtr;
ConfigEntry *entry;
ListNode *node;
ConfigParam *param;
if (!findInList(configEntriesList, name, &voidPtr))
return NULL;
entry = voidPtr;
node = entry->configParamList->firstNode;
if (last) {
while (node != NULL) {
param = node->data;
node = node->nextNode;
if (param == last)
break;
}
}
if (node == NULL)
return NULL;
param = node->data;
return param;
}
char *getConfigParamValue(const char *name)
{
ConfigParam *param = getConfigParam(name);
if (!param)
return NULL;
return param->value;
}
BlockParam *getBlockParam(ConfigParam * param, const char *name)
{
BlockParam *ret = NULL;
int i;
for (i = 0; i < param->numberOfBlockParams; i++) {
if (0 == strcmp(name, param->blockParams[i].name)) {
if (ret) {
ERROR("\"%s\" first defined on line %i, and "
"redefined on line %i\n", name,
ret->line, param->blockParams[i].line);
}
ret = param->blockParams + i;
}
}
return ret;
}
ConfigParam *parseConfigFilePath(const char *name, int force)
{
ConfigParam *param = getConfigParam(name);
char *path;
if (!param && force)
FATAL("config parameter \"%s\" not found\n", name);
if (!param)
return NULL;
path = parsePath(param->value);
if (!path)
FATAL("error parsing \"%s\" at line %i\n", name, param->line);
free(param->value);
param->value = path;
return param;
}
int getBoolConfigParam(const char *name, int force)
{
int ret;
ConfigParam *param = getConfigParam(name);
if (!param)
return CONF_BOOL_UNSET;
ret = get_bool(param->value);
if (force && ret == CONF_BOOL_INVALID)
FATAL("%s is not a boolean value (yes, true, 1) or "
"(no, false, 0) on line %i\n",
name, param->line);
return ret;
}
int getBoolBlockParam(ConfigParam *param, const char *name, int force)
{
int ret;
BlockParam *bp = getBlockParam(param, name);
if (!bp)
return CONF_BOOL_UNSET;
ret = get_bool(bp->value);
if (force && ret == CONF_BOOL_INVALID)
FATAL("%s is not a boolean value (yes, true, 1) or "
"(no, false, 0) on line %i\n", bp->value, bp->line);
return ret;
}
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