VuoSort.c

Go to the documentation of this file.

 
#include "VuoSort.h"
 
#include <math.h>
 
#ifdef VUO_COMPILER
VuoModuleMetadata({
                      "title" : "VuoSort",
                      "dependencies" : [
                      ]
                 });
#endif
 
static int compareFloats(const void *a, const void *b)
{
    VuoIndexedFloat *aa = (VuoIndexedFloat *)a;
    VuoIndexedFloat *bb = (VuoIndexedFloat *)b;
 
    return copysign(1, aa->value - bb->value);
}
 
void VuoSort_sortArrayByOtherArray(void *array, unsigned long elemCount, unsigned long elemSize, VuoIndexedFloat *other)
{
    qsort(other, elemCount, sizeof(VuoIndexedFloat), compareFloats);
 
    char *srcBytes = (char *)malloc(elemCount * elemSize);
    memcpy(srcBytes, array, elemCount * elemSize);
 
    char *dstBytes = (char *)array;
 
    for (size_t i = 0; i < elemCount; ++i)
        memcpy(dstBytes + i * elemSize, srcBytes + other[i].index * elemSize, elemSize);
 
    free(srcBytes);
}