+/**************************************************************************
+ *
+ * Copyright 2010 LunarG, Inc.
+ * All Rights Reserved.
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sub license, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice (including the
+ * next paragraph) shall be included in all copies or substantial portions
+ * of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
+ * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ **************************************************************************/
+
+
+#include <assert.h>
#include <stdlib.h>
#include <string.h>
/**
- * Filter an array and return the filtered data. The returned data pointer
- * should be freed.
+ * Filter an array and return the number of filtered elements.
*/
-void **
-_eglFilterArray(_EGLArray *array, EGLint *size,
+EGLint
+_eglFilterArray(_EGLArray *array, void **data, EGLint size,
_EGLArrayForEach filter, void *filter_data)
{
- void **data;
EGLint count = 0, i;
- if (!array) {
- *size = 0;
- return malloc(0);
- }
-
- data = malloc(array->Size * sizeof(array->Elements[0]));
- if (!data)
- return NULL;
+ if (!array)
+ return 0;
- if (filter) {
- for (i = 0; i < array->Size; i++) {
- if (filter(array->Elements[i], filter_data))
- data[count++] = array->Elements[i];
+ assert(filter);
+ for (i = 0; i < array->Size; i++) {
+ if (filter(array->Elements[i], filter_data)) {
+ if (data && count < size)
+ data[count] = array->Elements[i];
+ count++;
}
- }
- else {
- memcpy(data, array->Elements, array->Size * sizeof(array->Elements[0]));
+ if (data && count >= size)
+ break;
}
- *size = count;
-
- return data;
+ return count;
}
count = array->Size;
if (buffer) {
+ /* clamp size to 0 */
+ if (size < 0)
+ size = 0;
/* do not exceed buffer size */
if (count > size)
count = size;