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mpv/m_config.c
diego 12d3e0df99 cleanup: don't check for NULL before free() 
patch by Clément Bœsch, ubitux gmail com

git-svn-id: svn://svn.mplayerhq.hu/mplayer/trunk@32598 b3059339-0415-0410-9bf9-f77b7e298cf2
2010-11-08 18:05:12 +02:00

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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.
*/
/// \file
/// \ingroup Config
#include "config.h"
#include <stdlib.h>
#include <stdio.h>
#include <errno.h>
#include <string.h>
#include "talloc.h"
#ifdef MP_DEBUG
#include <assert.h>
#endif
#include "m_config.h"
#include "m_option.h"
#include "mp_msg.h"
#define MAX_PROFILE_DEPTH 20
static int parse_profile(const m_option_t *opt, const char *name,
const char *param, void *dst, int src)
{
m_config_t *config = opt->priv;
char **list = NULL;
int i, r;
if (param && !strcmp(param, "help")) {
m_profile_t *p;
if (!config->profiles) {
mp_tmsg(MSGT_CFGPARSER, MSGL_INFO, "No profiles have been defined.\n");
return M_OPT_EXIT-1;
}
mp_tmsg(MSGT_CFGPARSER, MSGL_INFO, "Available profiles:\n");
for (p = config->profiles; p; p = p->next)
mp_msg(MSGT_CFGPARSER, MSGL_INFO, "\t%s\t%s\n", p->name,
p->desc ? p->desc : "");
mp_msg(MSGT_CFGPARSER, MSGL_INFO, "\n");
return M_OPT_EXIT-1;
}
r = m_option_type_string_list.parse(opt, name, param, &list, src);
if (r < 0)
return r;
if (!list || !list[0])
return M_OPT_INVALID;
for (i = 0; list[i]; i++)
if (!m_config_get_profile(config,list[i])) {
mp_tmsg(MSGT_CFGPARSER, MSGL_WARN, "Unknown profile '%s'.\n",
list[i]);
r = M_OPT_INVALID;
}
if (dst)
m_option_copy(opt, dst, &list);
else
m_option_free(opt, &list);
return r;
}
static void set_profile(const m_option_t *opt, void *dst, const void *src)
{
m_config_t *config = opt->priv;
m_profile_t *p;
char **list = NULL;
int i;
if (!src || !*(char***)src)
return;
m_option_copy(opt, &list, src);
for (i = 0; list[i]; i++) {
p = m_config_get_profile(config, list[i]);
if (!p)
continue;
m_config_set_profile(config, p);
}
m_option_free(opt, &list);
}
static int show_profile(m_option_t *opt, char* name, char *param)
{
m_config_t *config = opt->priv;
m_profile_t *p;
int i, j;
if (!param)
return M_OPT_MISSING_PARAM;
if (!(p = m_config_get_profile(config, param))) {
mp_tmsg(MSGT_CFGPARSER, MSGL_ERR, "Unknown profile '%s'.\n", param);
return M_OPT_EXIT - 1;
}
if (!config->profile_depth)
mp_tmsg(MSGT_CFGPARSER, MSGL_INFO, "Profile %s: %s\n", param,
p->desc ? p->desc : "");
config->profile_depth++;
for (i = 0; i < p->num_opts; i++) {
char spc[config->profile_depth + 1];
for (j = 0; j < config->profile_depth; j++)
spc[j] = ' ';
spc[config->profile_depth] = '\0';
mp_msg(MSGT_CFGPARSER, MSGL_INFO, "%s%s=%s\n", spc,
p->opts[2 * i], p->opts[2 * i + 1]);
if (config->profile_depth < MAX_PROFILE_DEPTH
&& !strcmp(p->opts[2*i], "profile")) {
char *e, *list = p->opts[2 * i + 1];
while ((e = strchr(list, ','))) {
int l = e-list;
char tmp[l+1];
if (!l)
continue;
memcpy(tmp, list, l);
tmp[l] = '\0';
show_profile(opt, name, tmp);
list = e+1;
}
if (list[0] != '\0')
show_profile(opt, name, list);
}
}
config->profile_depth--;
if (!config->profile_depth)
mp_msg(MSGT_CFGPARSER, MSGL_INFO, "\n");
return M_OPT_EXIT - 1;
}
static int list_options(m_option_t *opt, char *name, char *param)
{
m_config_t *config = opt->priv;
m_config_print_option_list(config);
return M_OPT_EXIT;
}
static void m_option_save(const m_config_t *config, const m_option_t *opt,
void *dst)
{
if (opt->type->save) {
const void *src = opt->new ? (char*)config->optstruct + opt->offset : opt->p;
opt->type->save(opt, dst, src);
}
}
static void m_option_set(const m_config_t *config, const m_option_t *opt,
const void *src)
{
if (opt->type->set) {
void *dst = opt->new ? (char*)config->optstruct + opt->offset : opt->p;
opt->type->set(opt, dst, src);
}
}
static void
m_config_add_option(m_config_t *config, const m_option_t *arg, const char* prefix);
m_config_t *m_config_new(void *optstruct,
int includefunc(m_option_t *conf, char *filename))
{
m_config_t* config;
static int initialized = 0;
static m_option_type_t profile_opt_type;
static const m_option_t ref_opts[] = {
{ "profile", NULL, &profile_opt_type, CONF_NOSAVE, 0, 0, NULL },
{ "show-profile", show_profile, CONF_TYPE_PRINT_FUNC, CONF_NOCFG, 0, 0, NULL },
{ "list-options", list_options, CONF_TYPE_PRINT_FUNC, CONF_NOCFG, 0, 0, NULL },
{ NULL, NULL, NULL, 0, 0, 0, NULL }
};
int i;
config = talloc_zero(NULL, m_config_t);
config->lvl = 1; // 0 Is the defaults
if(!initialized) {
initialized = 1;
profile_opt_type = m_option_type_string_list;
profile_opt_type.parse = parse_profile;
profile_opt_type.set = set_profile;
}
m_option_t *self_opts = talloc_memdup(config, ref_opts, sizeof(ref_opts));
for (i = 0; self_opts[i].name; i++)
self_opts[i].priv = config;
m_config_register_options(config, self_opts);
if (includefunc) {
struct m_option *p = talloc_ptrtype(config, p);
*p = (struct m_option){"include", includefunc, CONF_TYPE_FUNC_PARAM,
CONF_NOSAVE, 0, 0, config};
m_config_add_option(config, p, NULL);
}
config->optstruct = optstruct;
return config;
}
void m_config_free(m_config_t* config)
{
m_config_option_t *opt;
for (opt = config->opts; opt; opt = opt->next) {
if (opt->flags & M_CFG_OPT_ALIAS)
continue;
m_config_save_slot_t *sl;
for (sl = opt->slots; sl; sl = sl->prev)
m_option_free(opt->opt, sl->data);
}
talloc_free(config);
}
void
m_config_push(m_config_t* config) {
m_config_option_t *co;
m_config_save_slot_t *slot;
#ifdef MP_DEBUG
assert(config != NULL);
assert(config->lvl > 0);
#endif
config->lvl++;
for(co = config->opts ; co ; co = co->next ) {
if(co->opt->type->flags & M_OPT_TYPE_HAS_CHILD)
continue;
if(co->opt->flags & (M_OPT_GLOBAL|M_OPT_NOSAVE))
continue;
if((co->opt->flags & M_OPT_OLD) && !(co->flags & M_CFG_OPT_SET))
continue;
if(co->flags & M_CFG_OPT_ALIAS)
continue;
// Update the current status
m_option_save(config, co->opt, co->slots->data);
// Allocate a new slot
slot = talloc_zero_size(co, sizeof(m_config_save_slot_t) +
co->opt->type->size);
slot->lvl = config->lvl;
slot->prev = co->slots;
co->slots = slot;
m_option_copy(co->opt,co->slots->data,co->slots->prev->data);
// Reset our set flag
co->flags &= ~M_CFG_OPT_SET;
}
mp_msg(MSGT_CFGPARSER, MSGL_DBG2,"Config pushed level is now %d\n",config->lvl);
}
void
m_config_pop(m_config_t* config) {
m_config_option_t *co;
m_config_save_slot_t *slot;
#ifdef MP_DEBUG
assert(config != NULL);
assert(config->lvl > 1);
#endif
for(co = config->opts ; co ; co = co->next ) {
int pop = 0;
if(co->opt->type->flags & M_OPT_TYPE_HAS_CHILD)
continue;
if(co->opt->flags & (M_OPT_GLOBAL|M_OPT_NOSAVE))
continue;
if(co->flags & M_CFG_OPT_ALIAS)
continue;
if(co->slots->lvl > config->lvl)
mp_tmsg(MSGT_CFGPARSER, MSGL_WARN,"Save slot found from lvl %d is too old: %d !!!\n",config->lvl,co->slots->lvl);
while(co->slots->lvl >= config->lvl) {
m_option_free(co->opt,co->slots->data);
slot = co->slots;
co->slots = slot->prev;
talloc_free(slot);
pop++;
}
if(pop) // We removed some ctx -> set the previous value
m_option_set(config, co->opt, co->slots->data);
}
config->lvl--;
mp_msg(MSGT_CFGPARSER, MSGL_DBG2,"Config poped level=%d\n",config->lvl);
}
static void
m_config_add_option(m_config_t *config, const m_option_t *arg, const char* prefix) {
m_config_option_t *co;
m_config_save_slot_t* sl;
#ifdef MP_DEBUG
assert(config != NULL);
assert(config->lvl > 0);
assert(arg != NULL);
#endif
// Allocate a new entry for this option
co = talloc_zero_size(config, sizeof(m_config_option_t) + arg->type->size);
co->opt = arg;
// Fill in the full name
if(prefix && strlen(prefix) > 0) {
co->name = talloc_asprintf(co, "%s:%s", prefix, arg->name);
} else
co->name = arg->name;
// Option with children -> add them
if(arg->type->flags & M_OPT_TYPE_HAS_CHILD) {
const m_option_t *ol = arg->p;
int i;
co->slots = NULL;
for(i = 0 ; ol[i].name != NULL ; i++)
m_config_add_option(config,&ol[i], co->name);
} else {
m_config_option_t *i;
// Check if there is already an option pointing to this address
if(arg->p || arg->new && arg->offset >= 0) {
for(i = config->opts ; i ; i = i->next ) {
if (arg->new ? (i->opt->new && i->opt->offset == arg->offset)
: (!i->opt->new && i->opt->p == arg->p)) {
// So we don't save the same vars more than 1 time
co->slots = i->slots;
co->flags |= M_CFG_OPT_ALIAS;
break;
}
}
}
if(!(co->flags & M_CFG_OPT_ALIAS)) {
// Allocate a slot for the defaults
sl = talloc_zero_size(co, sizeof(m_config_save_slot_t) +
arg->type->size);
m_option_save(config, arg, sl->data);
// Hack to avoid too much trouble with dynamically allocated data :
// We always use a dynamic version
if ((arg->type->flags & M_OPT_TYPE_DYNAMIC)) {
char **hackptr = arg->new ? (char*)config->optstruct + arg->offset
: arg->p;
if (hackptr && *hackptr) {
*hackptr = NULL;
m_option_set(config, arg, sl->data);
}
}
sl->lvl = 0;
sl->prev = NULL;
co->slots = talloc_zero_size(co, sizeof(m_config_save_slot_t) +
arg->type->size);
co->slots->prev = sl;
co->slots->lvl = config->lvl;
m_option_copy(co->opt, co->slots->data, sl->data);
}
}
co->next = config->opts;
config->opts = co;
}
int
m_config_register_options(m_config_t *config, const m_option_t *args) {
int i;
#ifdef MP_DEBUG
assert(config != NULL);
assert(config->lvl > 0);
assert(args != NULL);
#endif
for(i = 0 ; args[i].name != NULL ; i++)
m_config_add_option(config,&args[i],NULL);
return 1;
}
static m_config_option_t*
m_config_get_co(const m_config_t *config, char *arg) {
m_config_option_t *co;
for(co = config->opts ; co ; co = co->next ) {
int l = strlen(co->name) - 1;
if((co->opt->type->flags & M_OPT_TYPE_ALLOW_WILDCARD) &&
(co->name[l] == '*')) {
if(strncasecmp(co->name,arg,l) == 0)
return co;
} else if(strcasecmp(co->name,arg) == 0)
return co;
}
return NULL;
}
static int
m_config_parse_option(const m_config_t *config, char *arg, char *param, int set) {
m_config_option_t *co;
int r = 0;
#ifdef MP_DEBUG
assert(config != NULL);
assert(config->lvl > 0);
assert(arg != NULL);
#endif
co = m_config_get_co(config,arg);
if(!co){
// mp_msg(MSGT_CFGPARSER, MSGL_ERR,"Unknown option: %s\n",arg);
return M_OPT_UNKNOWN;
}
#ifdef MP_DEBUG
// This is the only mandatory function
assert(co->opt->type->parse);
#endif
// Check if this option isn't forbidden in the current mode
if((config->mode == M_CONFIG_FILE) && (co->opt->flags & M_OPT_NOCFG)) {
mp_tmsg(MSGT_CFGPARSER, MSGL_ERR,"The %s option can't be used in a config file.\n",arg);
return M_OPT_INVALID;
}
if((config->mode == M_COMMAND_LINE) && (co->opt->flags & M_OPT_NOCMD)) {
mp_tmsg(MSGT_CFGPARSER, MSGL_ERR,"The %s option can't be used on the command line.\n",arg);
return M_OPT_INVALID;
}
// During command line preparse set only pre-parse options
// Otherwise only set pre-parse option if they were not already set.
if(((config->mode == M_COMMAND_LINE_PRE_PARSE) &&
!(co->opt->flags & M_OPT_PRE_PARSE)) ||
((config->mode != M_COMMAND_LINE_PRE_PARSE) &&
(co->opt->flags & M_OPT_PRE_PARSE) && (co->flags & M_CFG_OPT_SET)))
set = 0;
// Option with children are a bit different to parse
if(co->opt->type->flags & M_OPT_TYPE_HAS_CHILD) {
char** lst = NULL;
int i,sr;
// Parse the child options
r = m_option_parse(co->opt,arg,param,&lst,M_COMMAND_LINE);
// Set them now
if(r >= 0)
for(i = 0 ; lst && lst[2*i] ; i++) {
int l = strlen(co->name) + 1 + strlen(lst[2*i]) + 1;
if(r >= 0) {
// Build the full name
char n[l];
sprintf(n,"%s:%s",co->name,lst[2*i]);
sr = m_config_parse_option(config,n,lst[2*i+1],set);
if(sr < 0){
if(sr == M_OPT_UNKNOWN){
mp_tmsg(MSGT_CFGPARSER, MSGL_ERR,"Error: option '%s' has no suboption '%s'.\n",co->name,lst[2*i]);
r = M_OPT_INVALID;
} else
if(sr == M_OPT_MISSING_PARAM){
mp_tmsg(MSGT_CFGPARSER, MSGL_ERR,"Error: suboption '%s' of '%s' must have a parameter!\n",lst[2*i],co->name);
r = M_OPT_INVALID;
} else
r = sr;
}
}
free(lst[2*i]);
free(lst[2*i+1]);
}
free(lst);
} else
r = m_option_parse(co->opt,arg,param,set ? co->slots->data : NULL,config->mode);
// Parsing failed ?
if(r < 0)
return r;
// Set the option
if(set) {
m_option_set(config, co->opt, co->slots->data);
co->flags |= M_CFG_OPT_SET;
}
return r;
}
int
m_config_set_option(m_config_t *config, char* arg, char* param) {
mp_msg(MSGT_CFGPARSER, MSGL_DBG2,"Setting %s=%s\n",arg,param);
return m_config_parse_option(config,arg,param,1);
}
int
m_config_check_option(const m_config_t *config, char *arg, char *param) {
int r;
mp_msg(MSGT_CFGPARSER, MSGL_DBG2,"Checking %s=%s\n",arg,param);
r=m_config_parse_option(config,arg,param,0);
if(r==M_OPT_MISSING_PARAM){
mp_tmsg(MSGT_CFGPARSER, MSGL_ERR,"Error: option '%s' must have a parameter!\n",arg);
return M_OPT_INVALID;
}
return r;
}
const m_option_t*
m_config_get_option(const m_config_t *config, char *arg) {
m_config_option_t *co;
#ifdef MP_DEBUG
assert(config != NULL);
assert(config->lvl > 0);
assert(arg != NULL);
#endif
co = m_config_get_co(config,arg);
if(co)
return co->opt;
else
return NULL;
}
void
m_config_print_option_list(const m_config_t *config) {
char min[50],max[50];
m_config_option_t* co;
int count = 0;
if(!config->opts) return;
mp_tmsg(MSGT_CFGPARSER, MSGL_INFO, "\n Name Type Min Max Global CL Cfg\n\n");
for(co = config->opts ; co ; co = co->next) {
const m_option_t* opt = co->opt;
if(opt->type->flags & M_OPT_TYPE_HAS_CHILD) continue;
if(opt->flags & M_OPT_MIN)
sprintf(min,"%-8.0f",opt->min);
else
strcpy(min,"No");
if(opt->flags & M_OPT_MAX)
sprintf(max,"%-8.0f",opt->max);
else
strcpy(max,"No");
mp_msg(MSGT_CFGPARSER, MSGL_INFO, " %-20.20s %-15.15s %-10.10s %-10.10s %-3.3s %-3.3s %-3.3s\n",
co->name,
co->opt->type->name,
min,
max,
opt->flags & CONF_GLOBAL ? "Yes" : "No",
opt->flags & CONF_NOCMD ? "No" : "Yes",
opt->flags & CONF_NOCFG ? "No" : "Yes");
count++;
}
mp_tmsg(MSGT_CFGPARSER, MSGL_INFO, "\nTotal: %d options\n",count);
}
m_profile_t*
m_config_get_profile(const m_config_t *config, char *name) {
m_profile_t* p;
for(p = config->profiles ; p ; p = p->next)
if(!strcmp(p->name,name)) return p;
return NULL;
}
m_profile_t*
m_config_add_profile(m_config_t* config, char* name) {
m_profile_t* p = m_config_get_profile(config,name);
if(p) return p;
p = talloc_zero(config, m_profile_t);
p->name = talloc_strdup(p, name);
p->next = config->profiles;
config->profiles = p;
return p;
}
void
m_profile_set_desc(m_profile_t* p, char* desc) {
talloc_free(p->desc);
p->desc = talloc_strdup(p, desc);
}
int
m_config_set_profile_option(m_config_t* config, m_profile_t* p,
char* name, char* val) {
int i = m_config_check_option(config,name,val);
if(i < 0) return i;
p->opts = talloc_realloc(p, p->opts, char *, 2*(p->num_opts+2));
p->opts[p->num_opts*2] = talloc_strdup(p, name);
p->opts[p->num_opts*2+1] = talloc_strdup(p, val);
p->num_opts++;
p->opts[p->num_opts*2] = p->opts[p->num_opts*2+1] = NULL;
return 1;
}
void
m_config_set_profile(m_config_t* config, m_profile_t* p) {
int i;
if(config->profile_depth > MAX_PROFILE_DEPTH) {
mp_tmsg(MSGT_CFGPARSER, MSGL_WARN, "WARNING: Profile inclusion too deep.\n");
return;
}
config->profile_depth++;
for(i = 0 ; i < p->num_opts ; i++)
m_config_set_option(config,p->opts[2*i],p->opts[2*i+1]);
config->profile_depth--;
}
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