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#include <stdlib.h>
#include <string.h>
#include "egllog.h"
#include "eglarray.h"
/**
* Grow the size of the array.
*/
static EGLBoolean
_eglGrowArray(_EGLArray *array)
{
EGLint new_size;
void **elems;
new_size = array->MaxSize;
while (new_size <= array->Size)
new_size *= 2;
elems = realloc(array->Elements, new_size * sizeof(array->Elements[0]));
if (!elems) {
_eglLog(_EGL_DEBUG, "failed to grow %s array to %d",
array->Name, new_size);
return EGL_FALSE;
}
array->Elements = elems;
array->MaxSize = new_size;
return EGL_TRUE;
}
/**
* Create an array.
*/
_EGLArray *
_eglCreateArray(const char *name, EGLint init_size)
{
_EGLArray *array;
array = calloc(1, sizeof(*array));
if (array) {
array->Name = name;
array->MaxSize = (init_size > 0) ? init_size : 1;
if (!_eglGrowArray(array)) {
free(array);
array = NULL;
}
}
return array;
}
/**
* Destroy an array, optionally free the data.
*/
void
_eglDestroyArray(_EGLArray *array, void (*free_cb)(void *))
{
if (free_cb) {
EGLint i;
for (i = 0; i < array->Size; i++)
free_cb(array->Elements[i]);
}
free(array->Elements);
free(array);
}
/**
* Append a element to an array.
*/
void
_eglAppendArray(_EGLArray *array, void *elem)
{
if (array->Size >= array->MaxSize && !_eglGrowArray(array))
return;
array->Elements[array->Size++] = elem;
}
/**
* Erase an element from an array.
*/
void
_eglEraseArray(_EGLArray *array, EGLint i, void (*free_cb)(void *))
{
if (free_cb)
free_cb(array->Elements[i]);
if (i < array->Size - 1) {
memmove(&array->Elements[i], &array->Elements[i + 1],
(array->Size - i - 1) * sizeof(array->Elements[0]));
}
array->Size--;
}
/**
* Find in an array for the given element.
*/
void *
_eglFindArray(_EGLArray *array, void *elem)
{
EGLint i;
if (!array)
return NULL;
for (i = 0; i < array->Size; i++)
if (array->Elements[i] == elem)
return elem;
return NULL;
}
/**
* Filter an array and return the filtered data. The returned data pointer
* should be freed.
*/
void **
_eglFilterArray(_EGLArray *array, 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 (filter) {
for (i = 0; i < array->Size; i++) {
if (filter(array->Elements[i], filter_data))
data[count++] = array->Elements[i];
}
}
else {
memcpy(data, array->Elements, array->Size * sizeof(array->Elements[0]));
}
*size = count;
return data;
}
/**
* Flatten an array by converting array elements into another form and store
* them in a buffer.
*/
EGLint
_eglFlattenArray(_EGLArray *array, void *buffer, EGLint elem_size, EGLint size,
_EGLArrayForEach flatten)
{
EGLint i, count;
if (!array)
return 0;
count = array->Size;
if (buffer) {
/* do not exceed buffer size */
if (count > size)
count = size;
for (i = 0; i < count; i++)
flatten(array->Elements[i],
(void *) ((char *) buffer + elem_size * i));
}
return count;
}
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