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mpv/parser-cfg.c

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/*
* This file is part of MPlayer.
*
* MPlayer 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.
*
* MPlayer 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 MPlayer; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <ctype.h>
#include <assert.h>
#include "osdep/io.h"
#include "parser-cfg.h"
#include "mp_msg.h"
#include "m_option.h"
#include "m_config.h"
/// Maximal include depth.
#define MAX_RECURSION_DEPTH 8
/// Current include depth.
static int recursion_depth = 0;
/// Setup the \ref Config from a config file.
/** \param config The config object.
* \param conffile Path to the config file.
* \return 1 on sucess, -1 on error, 0 if file not accessible.
*/
int m_config_parse_config_file(m_config_t *config, const char *conffile)
{
#define PRINT_LINENUM mp_msg(MSGT_CFGPARSER, MSGL_V, "%s(%d): ", conffile, line_num)
#define MAX_LINE_LEN 10000
#define MAX_OPT_LEN 1000
#define MAX_PARAM_LEN 1500
FILE *fp;
char *line;
char opt[MAX_OPT_LEN + 1];
char param[MAX_PARAM_LEN + 1];
char c; /* for the "" and '' check */
int tmp;
int line_num = 0;
int line_pos; /* line pos */
int opt_pos; /* opt pos */
int param_pos; /* param pos */
int ret = 1;
int errors = 0;
int prev_mode = config->mode;
m_profile_t *profile = NULL;
mp_msg(MSGT_CFGPARSER, MSGL_V, "Reading config file %s", conffile);
if (recursion_depth > MAX_RECURSION_DEPTH) {
mp_msg(MSGT_CFGPARSER, MSGL_ERR,
": too deep 'include'. check your configfiles\n");
ret = -1;
goto out;
} else
config->mode = M_CONFIG_FILE;
if ((line = malloc(MAX_LINE_LEN + 1)) == NULL) {
mp_msg(MSGT_CFGPARSER, MSGL_FATAL,
"\ncan't get memory for 'line': %s", strerror(errno));
ret = -1;
goto out;
} else
mp_msg(MSGT_CFGPARSER, MSGL_V, "\n");
if ((fp = fopen(conffile, "r")) == NULL) {
mp_msg(MSGT_CFGPARSER, MSGL_V, ": %s\n", strerror(errno));
free(line);
ret = 0;
goto out;
}
while (fgets(line, MAX_LINE_LEN, fp)) {
if (errors >= 16) {
mp_msg(MSGT_CFGPARSER, MSGL_FATAL, "too many errors\n");
goto out;
}
line_num++;
line_pos = 0;
/* skip whitespaces */
while (isspace(line[line_pos]))
++line_pos;
/* EOL / comment */
if (line[line_pos] == '\0' || line[line_pos] == '#')
continue;
/* read option. */
for (opt_pos = 0; isprint(line[line_pos]) &&
line[line_pos] != ' ' &&
line[line_pos] != '#' &&
line[line_pos] != '='; /* NOTHING */) {
opt[opt_pos++] = line[line_pos++];
if (opt_pos >= MAX_OPT_LEN) {
PRINT_LINENUM;
mp_msg(MSGT_CFGPARSER, MSGL_ERR,
"too long option at line %d\n", line_num);
errors++;
ret = -1;
goto nextline;
}
}
if (opt_pos == 0) {
PRINT_LINENUM;
mp_msg(MSGT_CFGPARSER, MSGL_ERR, "parse error at line %d\n",
line_num);
ret = -1;
errors++;
continue;
}
opt[opt_pos] = '\0';
/* Profile declaration */
if (opt_pos > 2 && opt[0] == '[' && opt[opt_pos - 1] == ']') {
opt[opt_pos - 1] = '\0';
if (strcmp(opt + 1, "default"))
profile = m_config_add_profile(config, opt + 1);
else
profile = NULL;
continue;
}
/* skip whitespaces */
while (isspace(line[line_pos]))
++line_pos;
/* check '=' */
if (line[line_pos++] != '=') {
PRINT_LINENUM;
mp_msg(MSGT_CFGPARSER, MSGL_ERR,
"Option %s needs a parameter at line %d\n", opt, line_num);
ret = -1;
errors++;
continue;
}
/* whitespaces... */
while (isspace(line[line_pos]))
++line_pos;
/* read the parameter */
if (line[line_pos] == '"' || line[line_pos] == '\'') {
c = line[line_pos];
++line_pos;
for (param_pos = 0; line[line_pos] != c; /* NOTHING */) {
param[param_pos++] = line[line_pos++];
if (param_pos >= MAX_PARAM_LEN) {
PRINT_LINENUM;
mp_msg(MSGT_CFGPARSER, MSGL_ERR,
"Option %s has a too long parameter at line %d\n",
opt, line_num);
ret = -1;
errors++;
goto nextline;
}
}
line_pos++; /* skip the closing " or ' */
} else {
for (param_pos = 0; isprint(line[line_pos])
&& !isspace(line[line_pos])
&& line[line_pos] != '#'; /* NOTHING */) {
param[param_pos++] = line[line_pos++];
if (param_pos >= MAX_PARAM_LEN) {
PRINT_LINENUM;
mp_msg(MSGT_CFGPARSER, MSGL_ERR, "too long parameter\n");
ret = -1;
errors++;
goto nextline;
}
}
}
param[param_pos] = '\0';
/* did we read a parameter? */
if (param_pos == 0) {
PRINT_LINENUM;
mp_msg(MSGT_CFGPARSER, MSGL_ERR,
"Option %s needs a parameter at line %d\n", opt, line_num);
ret = -1;
errors++;
continue;
}
/* now, check if we have some more chars on the line */
/* whitespace... */
while (isspace(line[line_pos]))
++line_pos;
/* EOL / comment */
if (line[line_pos] != '\0' && line[line_pos] != '#') {
PRINT_LINENUM;
mp_msg(MSGT_CFGPARSER, MSGL_WARN,
"extra characters on line %d: %s\n",
line_num, line + line_pos);
ret = -1;
}
if (profile) {
if (!strcmp(opt, "profile-desc"))
m_profile_set_desc(profile, param), tmp = 1;
else
tmp = m_config_set_profile_option(config, profile,
opt, param);
} else
tmp = m_config_set_option0(config, opt, param);
if (tmp < 0) {
PRINT_LINENUM;
if (tmp == M_OPT_UNKNOWN) {
mp_msg(MSGT_CFGPARSER, MSGL_WARN,
"Warning: unknown option '%s' at line %d in file '%s'.\n",
opt, line_num, conffile);
continue;
}
mp_msg(MSGT_CFGPARSER, MSGL_ERR,
"Error parsing option %s=%s at line %d\n",
opt, param, line_num);
ret = -1;
errors++;
continue;
/* break */
}
nextline:
;
}
free(line);
fclose(fp);
out:
config->mode = prev_mode;
--recursion_depth;
return ret;
}
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