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conf: parse json config in-place

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Avoid allocs by parsing the json in-place.
This commit is contained in:
Wim Taymans 2021-03-14 09:32:01 +01:00
parent 2d1f84fd7d
commit eb4a439488
1 changed files with 27 additions and 31 deletions
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58
src/pipewire/conf.c
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@ -277,7 +277,7 @@ int pw_conf_load_state(const char *prefix, const char *name, struct pw_propertie
* <factory-name regex> = <library-name>
* }
*/
static int parse_spa_libs(struct pw_context *context, const char *str)
static int parse_spa_libs(struct pw_context *context, char *str)
{
struct spa_json it[2];
char key[512], value[512];
@ -325,7 +325,7 @@ static int load_module(struct pw_context *context, const char *key, const char *
* }
* ]
*/
static int parse_modules(struct pw_context *context, const char *str)
static int parse_modules(struct pw_context *context, char *str)
{
struct spa_json it[3];
char key[512];
@ -346,30 +346,24 @@ static int parse_modules(struct pw_context *context, const char *str)
break;
if (strcmp(key, "name") == 0) {
name = malloc(len + 1);
name = (char*)val;
spa_json_parse_string(val, len, name);
}
else if (strcmp(key, "args") == 0) {
} else if (strcmp(key, "args") == 0) {
if (spa_json_is_container(val, len))
len = spa_json_container_len(&it[2], val, len);
args = malloc(len + 1);
args = (char*)val;
spa_json_parse_string(val, len, args);
} else if (strcmp(key, "flags") == 0) {
if (spa_json_is_container(val, len))
len = spa_json_container_len(&it[2], val, len);
flags = malloc(len + 1);
flags = (char*)val;
spa_json_parse_string(val, len, flags);
}
}
if (name != NULL)
res = load_module(context, name, args, flags);
free(name);
free(args);
free(flags);
if (res < 0)
break;
}
@ -411,7 +405,7 @@ static int create_object(struct pw_context *context, const char *key, const char
* }
* ]
*/
static int parse_objects(struct pw_context *context, const char *str)
static int parse_objects(struct pw_context *context, char *str)
{
struct spa_json it[3];
char key[512];
@ -432,25 +426,25 @@ static int parse_objects(struct pw_context *context, const char *str)
break;
if (strcmp(key, "factory") == 0) {
factory = malloc(len + 1);
factory = (char*)val;
spa_json_parse_string(val, len, factory);
} else if (strcmp(key, "args") == 0) {
if (spa_json_is_container(val, len))
len = spa_json_container_len(&it[2], val, len);
args = malloc(len + 1);
args = (char*)val;
spa_json_parse_string(val, len, args);
} else if (strcmp(key, "flags") == 0) {
flags = strndup(val, len);
if (spa_json_is_container(val, len))
len = spa_json_container_len(&it[2], val, len);
flags = (char*)val;
spa_json_parse_string(val, len, flags);
}
}
if (factory != NULL)
res = create_object(context, factory, args, flags);
free(factory);
free(args);
free(flags);
if (res < 0)
break;
}
@ -495,7 +489,7 @@ static int do_exec(struct pw_context *context, const char *key, const char *args
* }
* ]
*/
static int parse_exec(struct pw_context *context, const char *str)
static int parse_exec(struct pw_context *context, char *str)
{
struct spa_json it[3];
char key[512];
@ -516,19 +510,16 @@ static int parse_exec(struct pw_context *context, const char *str)
break;
if (strcmp(key, "path") == 0) {
path = malloc(len + 1);
path = (char*)val;
spa_json_parse_string(val, len, path);
} else if (strcmp(key, "args") == 0) {
args = malloc(len + 1);
args = (char*)val;
spa_json_parse_string(val, len, args);
}
}
if (path)
if (path != NULL)
res = do_exec(context, path, args);
free(path);
free(args);
if (res < 0)
break;
}
@ -540,21 +531,26 @@ int pw_context_parse_conf_section(struct pw_context *context,
struct pw_properties *conf, const char *section)
{
const char *str;
char *s;
int res;
if ((str = pw_properties_get(conf, section)) == NULL)
return -ENOENT;
s = strdup(str);
if (strcmp(section, "context.spa-libs") == 0)
res = parse_spa_libs(context, str);
res = parse_spa_libs(context, s);
else if (strcmp(section, "context.modules") == 0)
res = parse_modules(context, str);
res = parse_modules(context, s);
else if (strcmp(section, "context.objects") == 0)
res = parse_objects(context, str);
res = parse_objects(context, s);
else if (strcmp(section, "context.exec") == 0)
res = parse_exec(context, str);
res = parse_exec(context, s);
else
res = -EINVAL;
free(s);
return res;
}