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Added SDL_CopyProperties()

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This commit is contained in:
Sam Lantinga 2024-02-02 14:19:02 -08:00
parent c007c7ed55
commit 5d48f9a63a
6 changed files with 164 additions and 4 deletions
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72
src/SDL_properties.c
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@ -188,6 +188,78 @@ error:
return 0;
}
int SDL_CopyProperties(SDL_PropertiesID src, SDL_PropertiesID dst)
{
SDL_Properties *src_properties = NULL;
SDL_Properties *dst_properties = NULL;
int result = 0;
if (!src) {
return SDL_InvalidParamError("src");
}
if (!dst) {
return SDL_InvalidParamError("dst");
}
SDL_LockMutex(SDL_properties_lock);
SDL_FindInHashTable(SDL_properties, (const void *)(uintptr_t)src, (const void **)&src_properties);
SDL_FindInHashTable(SDL_properties, (const void *)(uintptr_t)dst, (const void **)&dst_properties);
SDL_UnlockMutex(SDL_properties_lock);
if (!src_properties) {
return SDL_InvalidParamError("src");
}
if (!dst_properties) {
return SDL_InvalidParamError("dst");
}
SDL_LockMutex(src_properties->lock);
SDL_LockMutex(dst_properties->lock);
{
void *iter;
const void *key, *value;
iter = NULL;
while (SDL_IterateHashTable(src_properties->props, &key, &value, &iter)) {
const char *src_name = (const char *)key;
const SDL_Property *src_property = (const SDL_Property *)value;
char *dst_name;
SDL_Property *dst_property;
if (src_property->cleanup) {
/* Can't copy properties with cleanup functions, we don't know how to duplicate the data */
continue;
}
SDL_RemoveFromHashTable(dst_properties->props, src_name);
dst_name = SDL_strdup(src_name);
if (!dst_name) {
result = -1;
continue;
}
dst_property = (SDL_Property *)SDL_malloc(sizeof(*dst_property));
if (!dst_property) {
SDL_free(dst_name);
result = -1;
continue;
}
SDL_copyp(dst_property, src_property);
if (src_property->type == SDL_PROPERTY_TYPE_STRING) {
dst_property->value.string_value = SDL_strdup(src_property->value.string_value);
}
if (!SDL_InsertIntoHashTable(dst_properties->props, dst_name, dst_property)) {
SDL_FreePropertyWithCleanup(dst_name, dst_property, NULL, SDL_FALSE);
result = -1;
}
}
}
SDL_UnlockMutex(dst_properties->lock);
SDL_UnlockMutex(src_properties->lock);
return result;
}
int SDL_LockProperties(SDL_PropertiesID props)
{
SDL_Properties *properties = NULL;