mirror of https://github.com/encounter/SDL.git
Added an API to iterate over game controller mappings
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@ -135,6 +135,20 @@ extern DECLSPEC int SDLCALL SDL_GameControllerAddMappingsFromRW(SDL_RWops * rw,
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*/
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extern DECLSPEC int SDLCALL SDL_GameControllerAddMapping(const char* mappingString);
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/**
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* Get the number of mappings installed
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*
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* \return the number of mappings
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*/
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extern DECLSPEC int SDLCALL SDL_GameControllerNumMappings();
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/**
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* Get the mapping at a particular index.
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*
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* \return the mapping string. Must be freed with SDL_free(). Returns NULL if the index is out of range.
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*/
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extern DECLSPEC char * SDLCALL SDL_GameControllerMappingForIndex(int mapping_index);
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/**
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* Get a mapping string for a GUID
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*
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@ -622,3 +622,5 @@
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#define SDL_GameControllerGetProduct SDL_GameControllerGetProduct_REAL
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#define SDL_GameControllerGetProductVersion SDL_GameControllerGetProductVersion_REAL
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#define SDL_HasNEON SDL_HasNEON_REAL
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#define SDL_GameControllerNumMappings SDL_GameControllerNumMappings_REAL
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#define SDL_GameControllerMappingForIndex SDL_GameControllerMappingForIndex_REAL
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@ -654,3 +654,5 @@ SDL_DYNAPI_PROC(Uint16,SDL_GameControllerGetVendor,(SDL_GameController *a),(a),r
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SDL_DYNAPI_PROC(Uint16,SDL_GameControllerGetProduct,(SDL_GameController *a),(a),return)
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SDL_DYNAPI_PROC(Uint16,SDL_GameControllerGetProductVersion,(SDL_GameController *a),(a),return)
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SDL_DYNAPI_PROC(SDL_bool,SDL_HasNEON,(void),(),return)
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SDL_DYNAPI_PROC(int,SDL_GameControllerNumMappings,(void),(),return)
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SDL_DYNAPI_PROC(char*,SDL_GameControllerMappingForIndex,(int a),(a),return)
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@ -96,6 +96,7 @@ typedef struct _ControllerMapping_t
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struct _ControllerMapping_t *next;
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} ControllerMapping_t;
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static SDL_JoystickGUID s_zeroGUID;
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static ControllerMapping_t *s_pSupportedControllers = NULL;
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static ControllerMapping_t *s_pXInputMapping = NULL;
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static ControllerMapping_t *s_pEmscriptenMapping = NULL;
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@ -872,6 +873,57 @@ SDL_GameControllerAddMapping(const char *mappingString)
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return SDL_PrivateGameControllerAddMapping(mappingString, SDL_CONTROLLER_MAPPING_PRIORITY_API);
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}
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/**
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* Get the number of mappings installed
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*/
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int
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SDL_GameControllerNumMappings()
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{
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int num_mappings = 0;
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ControllerMapping_t *mapping;
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for (mapping = s_pSupportedControllers; mapping; mapping = mapping->next) {
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if (SDL_memcmp(&mapping->guid, &s_zeroGUID, sizeof(mapping->guid)) == 0) {
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continue;
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}
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++num_mappings;
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}
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return num_mappings;
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}
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/**
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* Get the mapping at a particular index.
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*/
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char *
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SDL_GameControllerMappingForIndex(int mapping_index)
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{
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ControllerMapping_t *mapping;
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for (mapping = s_pSupportedControllers; mapping; mapping = mapping->next) {
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if (SDL_memcmp(&mapping->guid, &s_zeroGUID, sizeof(mapping->guid)) == 0) {
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continue;
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}
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if (mapping_index == 0) {
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char *pMappingString;
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char pchGUID[33];
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size_t needed;
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SDL_JoystickGetGUIDString(mapping->guid, pchGUID, sizeof(pchGUID));
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/* allocate enough memory for GUID + ',' + name + ',' + mapping + \0 */
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needed = SDL_strlen(pchGUID) + 1 + SDL_strlen(mapping->name) + 1 + SDL_strlen(mapping->mapping) + 1;
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pMappingString = SDL_malloc(needed);
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if (!pMappingString) {
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SDL_OutOfMemory();
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return NULL;
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}
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SDL_snprintf(pMappingString, needed, "%s,%s,%s", pchGUID, mapping->name, mapping->mapping);
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return pMappingString;
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}
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--mapping_index;
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}
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return NULL;
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}
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/*
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* Get the mapping string for this GUID
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*/
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@ -259,6 +259,17 @@ main(int argc, char *argv[])
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SDL_GameControllerAddMappingsFromFile("gamecontrollerdb.txt");
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/* Print information about the mappings */
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SDL_Log("Supported mappings:\n");
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for (i = 0; i < SDL_GameControllerNumMappings(); ++i) {
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char *mapping = SDL_GameControllerMappingForIndex(i);
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if (mapping) {
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SDL_Log("\t%s\n", mapping);
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SDL_free(mapping);
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}
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}
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SDL_Log("\n");
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/* Print information about the controller */
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for (i = 0; i < SDL_NumJoysticks(); ++i) {
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const char *name;
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