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/*
* This file is part of mpv.
*
* mpv 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.
*
* mpv 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 mpv. If not, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include "osdep/io.h"
#include "parse_configfile.h"
#include "common/common.h"
#include "common/msg.h"
#include "misc/ctype.h"
#include "m_option.h"
#include "m_config.h"
// Skip whitespace and comments (assuming there are no line breaks)
static bool skip_ws(bstr *s)
{
*s = bstr_lstrip(*s);
if (bstr_startswith0(*s, "#"))
s->len = 0;
return s->len;
}
int m_config_parse(m_config_t *config, const char *location, bstr data,
char *initial_section, int flags)
{
m_profile_t *profile = m_config_add_profile(config, initial_section);
void *tmp = talloc_new(NULL);
int line_no = 0;
int errors = 0;
bstr_eatstart0(&data, "\xEF\xBB\xBF"); // skip BOM
while (data.len) {
talloc_free_children(tmp);
bool ok = false;
line_no++;
char loc[512];
snprintf(loc, sizeof(loc), "%s:%d:", location, line_no);
bstr line = bstr_strip_linebreaks(bstr_getline(data, &data));
if (!skip_ws(&line))
continue;
// Profile declaration
if (bstr_eatstart0(&line, "[")) {
bstr profilename;
if (!bstr_split_tok(line, "]", &profilename, &line)) {
MP_ERR(config, "%s missing closing ]\n", loc);
goto error;
}
if (skip_ws(&line)) {
MP_ERR(config, "%s unparseable extra characters: '%.*s'\n",
loc, BSTR_P(line));
goto error;
}
profile = m_config_add_profile(config, bstrto0(tmp, profilename));
continue;
}
bstr_eatstart0(&line, "--");
bstr option = line;
while (line.len && (mp_isalnum(line.start[0]) || line.start[0] == '_' ||
line.start[0] == '-'))
line = bstr_cut(line, 1);
option.len = option.len - line.len;
skip_ws(&line);
bstr value = {0};
if (bstr_eatstart0(&line, "=")) {
skip_ws(&line);
if (line.len && (line.start[0] == '"' || line.start[0] == '\'')) {
// Simple quoting, like "value"
char term[2] = {line.start[0], 0};
line = bstr_cut(line, 1);
if (!bstr_split_tok(line, term, &value, &line)) {
MP_ERR(config, "%s unterminated quote\n", loc);
goto error;
}
} else if (bstr_eatstart0(&line, "%")) {
// Quoting with length, like %5%value
bstr rest;
long long len = bstrtoll(line, &rest, 10);
if (rest.len == line.len || !bstr_eatstart0(&rest, "%") ||
len > rest.len)
{
MP_ERR(config, "%s fixed-length quoting expected - put "
"\"quotes\" around the option value if you did not "
"intend to use this, but your option value starts "
"with '%%'\n", loc);
goto error;
}
value = bstr_splice(rest, 0, len);
line = bstr_cut(rest, len);
} else {
// No quoting; take everything until the comment or end of line
int end = bstrchr(line, '#');
value = bstr_strip(end < 0 ? line : bstr_splice(line, 0, end));
line.len = 0;
}
}
if (skip_ws(&line)) {
MP_ERR(config, "%s unparseable extra characters: '%.*s'\n",
loc, BSTR_P(line));
goto error;
}
int res;
if (profile) {
if (bstr_equals0(option, "profile-desc")) {
m_profile_set_desc(profile, value);
res = 0;
} else {
res = m_config_set_profile_option(config, profile, option, value);
}
} else {
res = m_config_set_option_ext(config, option, value, flags);
}
if (res < 0) {
MP_ERR(config, "%s setting option %.*s='%.*s' failed.\n",
loc, BSTR_P(option), BSTR_P(value));
goto error;
}
ok = true;
error:
if (!ok)
errors++;
if (errors > 16) {
MP_ERR(config, "%s: too many errors, stopping.\n", location);
break;
}
}
talloc_free(tmp);
return 1;
}
static bstr read_file(struct mp_log *log, const char *filename)
{
FILE *f = fopen(filename, "rb");
if (!f) {
mp_verbose(log, "Can't open config file: %s\n", mp_strerror(errno));
return (bstr){0};
}
char *data = talloc_array(NULL, char, 0);
size_t size = 0;
while (1) {
size_t left = talloc_get_size(data) - size;
if (!left) {
MP_TARRAY_GROW(NULL, data, size + 1);
continue;
}
size_t s = fread(data + size, 1, left, f);
if (!s) {
if (ferror(f))
mp_err(log, "Error reading config file.\n");
fclose(f);
MP_TARRAY_APPEND(NULL, data, size, 0);
return (bstr){data, size - 1};
}
size += s;
}
assert(0);
}
// Load options and profiles from from a config file.
// conffile: path to the config file
// initial_section: default section where to add normal options
// flags: M_SETOPT_* bits
// returns: 1 on success, -1 on error, 0 if file not accessible.
int m_config_parse_config_file(m_config_t *config, const char *conffile,
char *initial_section, int flags)
{
flags = flags | M_SETOPT_FROM_CONFIG_FILE;
MP_VERBOSE(config, "Reading config file %s\n", conffile);
bstr data = read_file(config->log, conffile);
if (!data.start)
return 0;
int r = m_config_parse(config, conffile, data, initial_section, flags);
talloc_free(data.start);
return r;
}
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