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mpv/m_config.c
Uoti Urpala 89b37a32da options: add "disabled option" functionality 
Add functionality to mark options that depend on features disabled at
compile time as disabled rather than not compiling the option
definitions at all. This allows printing a warning about the option
not being available because of a disabled feature, instead of just
"unknown option". Because the option definitions are still compiled
fully, this only works for definitions that do not reference symbols
which are not available if the feature is disabled. Use the new
functionality for options depending on libass.
2011-09-04 14:36:09 +03:00

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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 <assert.h>
#include <stdbool.h>
#include "talloc.h"
#include "m_config.h"
#include "m_option.h"
#include "mp_msg.h"
#define MAX_PROFILE_DEPTH 20
static int parse_profile(const struct m_option *opt, struct bstr name,
struct bstr param, bool ambiguous_param, void *dst)
{
struct m_config *config = opt->priv;
char **list = NULL;
int i, r;
if (!bstrcmp0(param, "help")) {
struct m_profile *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, false, &list);
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 struct m_option *opt, void *dst, const void *src)
{
struct m_config *config = opt->priv;
struct m_profile *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(struct m_option *opt, char *name, char *param)
{
struct m_config *config = opt->priv;
struct m_profile *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(struct m_option *opt, char *name, char *param)
{
struct m_config *config = opt->priv;
m_config_print_option_list(config);
return M_OPT_EXIT;
}
static void m_option_save(const struct m_config *config,
const struct m_option *opt, void *dst)
{
if (opt->type->save) {
const void *src = m_option_get_ptr(opt, config->optstruct);
opt->type->save(opt, dst, src);
}
}
static void m_option_set(const struct m_config *config,
const struct m_option *opt, const void *src)
{
if (opt->type->set) {
void *dst = m_option_get_ptr(opt, config->optstruct);
opt->type->set(opt, dst, src);
}
}
static void m_config_add_option(struct m_config *config,
const struct m_option *arg,
const char *prefix, char *disabled_feature);
struct m_config *m_config_new(void *optstruct,
int includefunc(struct m_option *conf,
char *filename))
{
struct m_config *config;
static int initialized = 0;
static struct m_option_type profile_opt_type;
static const struct m_option ref_opts[] = {
{ "profile", NULL, &profile_opt_type, CONF_NOSAVE, 0, 0, NULL },
{ "show-profile", show_profile, CONF_TYPE_PRINT_FUNC, CONF_NOCFG },
{ "list-options", list_options, CONF_TYPE_PRINT_FUNC, CONF_NOCFG },
{ NULL }
};
int i;
config = talloc_zero(NULL, struct m_config);
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;
}
struct m_option *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, NULL);
}
config->optstruct = optstruct;
return config;
}
void m_config_free(struct m_config *config)
{
struct m_config_option *copt;
for (copt = config->opts; copt; copt = copt->next) {
if (copt->flags & M_CFG_OPT_ALIAS)
continue;
if (copt->opt->type->flags & M_OPT_TYPE_DYNAMIC) {
void *ptr = m_option_get_ptr(copt->opt, config->optstruct);
if (ptr)
m_option_free(copt->opt, ptr);
}
struct m_config_save_slot *sl;
for (sl = copt->slots; sl; sl = sl->prev)
m_option_free(copt->opt, sl->data);
}
talloc_free(config);
}
void m_config_push(struct m_config *config)
{
struct m_config_option *co;
struct m_config_save_slot *slot;
assert(config != NULL);
assert(config->lvl > 0);
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->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(struct m_config_save_slot) +
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(struct m_config *config)
{
struct m_config_option *co;
struct m_config_save_slot *slot;
assert(config != NULL);
assert(config->lvl > 1);
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_msg(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 add_options(struct m_config *config, const struct m_option *defs,
const char *prefix, char *disabled_feature)
{
char *dis = disabled_feature;
const char marker[] = "conditional functionality: ";
for (int i = 0; defs[i].name; i++) {
if (!strncmp(defs[i].name, marker, strlen(marker))) {
// If a subconfig entry itself is disabled, everything
// under it is already disabled for the same reason.
if (!disabled_feature) {
if (!strcmp(defs[i].name + strlen(marker), "1"))
dis = NULL;
else
dis = defs[i].p;
}
continue;
}
m_config_add_option(config, defs + i, prefix, dis);
}
}
static void m_config_add_option(struct m_config *config,
const struct m_option *arg, const char *prefix,
char *disabled_feature)
{
struct m_config_option *co;
struct m_config_save_slot *sl;
assert(config != NULL);
assert(config->lvl > 0);
assert(arg != NULL);
// Allocate a new entry for this option
co = talloc_zero_size(config,
sizeof(struct m_config_option) + arg->type->size);
co->opt = arg;
co->disabled_feature = disabled_feature;
// Fill in the full name
if (prefix && *prefix)
co->name = talloc_asprintf(co, "%s:%s", prefix, arg->name);
else
co->name = (char *)arg->name;
// Option with children -> add them
if (arg->type->flags & M_OPT_TYPE_HAS_CHILD) {
add_options(config, arg->p, co->name, disabled_feature);
} else {
struct m_config_option *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(struct m_config_save_slot) +
arg->type->size);
m_option_save(config, arg, sl->data);
// Hack to avoid too much trouble with dynamically allocated data:
// We replace original default and always use a dynamic version
if ((arg->type->flags & M_OPT_TYPE_DYNAMIC)) {
char **hackptr = m_option_get_ptr(arg, config->optstruct);
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(struct m_config_save_slot) +
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(struct m_config *config,
const struct m_option *args)
{
assert(config != NULL);
assert(config->lvl > 0);
assert(args != NULL);
add_options(config, args, NULL, NULL);
return 1;
}
static struct m_config_option *m_config_get_co(const struct m_config *config,
struct bstr name)
{
struct m_config_option *co;
for (co = config->opts; co; co = co->next) {
struct bstr coname = bstr(co->name);
if ((co->opt->type->flags & M_OPT_TYPE_ALLOW_WILDCARD)
&& bstr_endswith0(coname, "*")) {
coname.len--;
if (bstrcasecmp(bstr_splice(name, 0, coname.len), coname) == 0)
return co;
} else if (bstrcasecmp(coname, name) == 0)
return co;
}
return NULL;
}
static int m_config_parse_option(const struct m_config *config,
struct bstr name, struct bstr param,
bool ambiguous_param, bool set)
{
struct m_config_option *co;
int r = 0;
assert(config != NULL);
assert(config->lvl > 0);
assert(name.len != 0);
co = m_config_get_co(config, name);
if (!co)
return M_OPT_UNKNOWN;
if (co->disabled_feature) {
mp_tmsg(MSGT_CFGPARSER, MSGL_ERR,
"Option \"%.*s\" is not available in this version of mplayer2, "
"because it has been compiled with feature \"%s\" disabled.\n",
BSTR_P(name), co->disabled_feature);
return M_OPT_UNKNOWN;
}
// This is the only mandatory function
assert(co->opt->type->parse);
// 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",
BSTR_P(name));
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",
BSTR_P(name));
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, name, param, false, &lst);
// 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, bstr(n),
bstr(lst[2 * i + 1]), false,
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;
}
}
talloc_free(lst[2 * i]);
talloc_free(lst[2 * i + 1]);
}
talloc_free(lst);
} else
r = m_option_parse(co->opt, name, param, ambiguous_param,
set ? co->slots->data : NULL);
// 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(struct m_config *config, struct bstr name,
struct bstr param, bool ambiguous_param)
{
mp_msg(MSGT_CFGPARSER, MSGL_DBG2, "Setting %.*s=%.*s\n", BSTR_P(name),
BSTR_P(param));
return m_config_parse_option(config, name, param, ambiguous_param, 1);
}
int m_config_check_option(const struct m_config *config, struct bstr name,
struct bstr param, bool ambiguous_param)
{
int r;
mp_msg(MSGT_CFGPARSER, MSGL_DBG2, "Checking %.*s=%.*s\n", BSTR_P(name),
BSTR_P(param));
r = m_config_parse_option(config, name, param, ambiguous_param, 0);
if (r == M_OPT_MISSING_PARAM) {
mp_tmsg(MSGT_CFGPARSER, MSGL_ERR,
"Error: option '%.*s' must have a parameter!\n", BSTR_P(name));
return M_OPT_INVALID;
}
return r;
}
const struct m_option *m_config_get_option(const struct m_config *config,
struct bstr name)
{
struct m_config_option *co;
assert(config != NULL);
assert(config->lvl > 0);
co = m_config_get_co(config, name);
if (co)
return co->opt;
else
return NULL;
}
void m_config_print_option_list(const struct m_config *config)
{
char min[50], max[50];
struct m_config_option *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 struct m_option *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);
}
struct m_profile *m_config_get_profile(const struct m_config *config,
char *name)
{
struct m_profile *p;
for (p = config->profiles; p; p = p->next)
if (!strcmp(p->name, name))
return p;
return NULL;
}
struct m_profile *m_config_add_profile(struct m_config *config, char *name)
{
struct m_profile *p = m_config_get_profile(config, name);
if (p)
return p;
p = talloc_zero(config, struct m_profile);
p->name = talloc_strdup(p, name);
p->next = config->profiles;
config->profiles = p;
return p;
}
void m_profile_set_desc(struct m_profile *p, char *desc)
{
talloc_free(p->desc);
p->desc = talloc_strdup(p, desc);
}
int m_config_set_profile_option(struct m_config *config, struct m_profile *p,
char *name, char *val)
{
int i = m_config_check_option0(config, name, val, false);
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(struct m_config *config, struct m_profile *p)
{
int i;
if (config->profile_depth > MAX_PROFILE_DEPTH) {
mp_tmsg(MSGT_CFGPARSER, MSGL_WARN,
"WARNING: Profile inclusion too deep.\n");
return;
}
int prev_mode = config->mode;
config->mode = M_CONFIG_FILE;
config->profile_depth++;
for (i = 0; i < p->num_opts; i++)
m_config_set_option0(config, p->opts[2 * i], p->opts[2 * i + 1], false);
config->profile_depth--;
config->mode = prev_mode;
}
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