257 int MuxImageCount(const WebPMuxImage* wpi_list, WebPChunkId id) {  in MuxImageCount()  argument
260   for (current = wpi_list; current != NULL; current = current->next_) {  in MuxImageCount()
277 static int SearchImageToGetOrDelete(WebPMuxImage** wpi_list, uint32_t nth,  in SearchImageToGetOrDelete()  argument
280   assert(wpi_list);  in SearchImageToGetOrDelete()
281   *location = wpi_list;  in SearchImageToGetOrDelete()
284     nth = MuxImageCount(*wpi_list, WEBP_CHUNK_NIL);  in SearchImageToGetOrDelete()
288   while (*wpi_list != NULL) {  in SearchImageToGetOrDelete()
289     WebPMuxImage* const cur_wpi = *wpi_list;  in SearchImageToGetOrDelete()
292     wpi_list = &cur_wpi->next_;  in SearchImageToGetOrDelete()
293     *location = wpi_list;  in SearchImageToGetOrDelete()
301 WebPMuxError MuxImagePush(const WebPMuxImage* wpi, WebPMuxImage** wpi_list) {  in MuxImagePush()  argument
304   while (*wpi_list != NULL) {  in MuxImagePush()
305     WebPMuxImage* const cur_wpi = *wpi_list;  in MuxImagePush()
307     wpi_list = &cur_wpi->next_;  in MuxImagePush()
315   if (*wpi_list != NULL) {  in MuxImagePush()
316     (*wpi_list)->next_ = new_wpi;  in MuxImagePush()
318     *wpi_list = new_wpi;  in MuxImagePush()
333 WebPMuxError MuxImageDeleteNth(WebPMuxImage** wpi_list, uint32_t nth) {  in MuxImageDeleteNth()  argument
334   assert(wpi_list);  in MuxImageDeleteNth()
335   if (!SearchImageToGetOrDelete(wpi_list, nth, &wpi_list)) {  in MuxImageDeleteNth()
338   *wpi_list = MuxImageDelete(*wpi_list);  in MuxImageDeleteNth()
345 WebPMuxError MuxImageGetNth(const WebPMuxImage** wpi_list, uint32_t nth,  in MuxImageGetNth()  argument
347   assert(wpi_list);  in MuxImageGetNth()
349   if (!SearchImageToGetOrDelete((WebPMuxImage**)wpi_list, nth,  in MuxImageGetNth()
350                                 (WebPMuxImage***)&wpi_list)) {  in MuxImageGetNth()
353   *wpi = (WebPMuxImage*)*wpi_list;  in MuxImageGetNth()