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UN_COMP_PROC(un_sort_std_comp_proc) {
assert(a != NULL);
assert(b != NULL);
return memcmp((u8*)a, (u8*)b, size);
}
UN_COMP_PROC(un_sort_s8_comp_proc) {
s8 a_s8, b_s8;
assert(size == sizeof(s8));
assert(a != NULL);
assert(b != NULL);
a_s8 = *(s8*)a;
b_s8 = *(s8*)b;
if (a_s8 < b_s8) return -1;
if (a_s8 > b_s8) return 1;
return 0;
}
UN_COMP_PROC(un_sort_s16_comp_proc) {
s16 a_s16, b_s16;
assert(size == sizeof(s16));
assert(a != NULL);
assert(b != NULL);
a_s16 = *(s16*)a;
b_s16 = *(s16*)b;
if (a_s16 < b_s16) return -1;
if (a_s16 > b_s16) return 1;
return 0;
}
UN_COMP_PROC(un_sort_s32_comp_proc) {
s32 a_s32, b_s32;
assert(size == sizeof(s32));
assert(a != NULL);
assert(b != NULL);
a_s32 = *(s32*)a;
b_s32 = *(s32*)b;
if (a_s32 < b_s32) return -1;
if (a_s32 > b_s32) return 1;
return 0;
}
UN_COMP_PROC(un_sort_s64_comp_proc) {
s64 a_s64, b_s64;
assert(size == sizeof(s64));
assert(a != NULL);
assert(b != NULL);
a_s64 = *(s64*)a;
b_s64 = *(s64*)b;
if (a_s64 < b_s64) return -1;
if (a_s64 > b_s64) return 1;
return 0;
}
UN_COMP_PROC(un_sort_string_comp_proc) {
assert(a != NULL);
assert(b != NULL);
assert(size == sizeof(String));
UNUSED(size);
String va = *(String*)a;
String vb = *(String*)b;
return un_string_compare(va, vb);
}
static void sort_swap(void *data, u32 size, u64 a, u64 b) {
void *temp;
void *a_addr, *b_addr;
a_addr = (u8*)data + a * size;
b_addr = (u8*)data + b * size;
temp = un_memory_alloc(size, un_alloc_temp_get());
memcpy(temp, a_addr, size);
memcpy(a_addr, b_addr, size);
memcpy(b_addr, temp, size);
}
// start - in elements, inclusive
// stop - in elements, exclusive
void un_sort_quick(void *data, u32 element_size, u64 start, u64 stop, compare_func_proc *comp) {
s64 size;
u64 begin_index, end_index, pivot_index;
u8 *pivot, *begin, *end;
Allocator talloc;
size = stop - start;
if (size < 2) {
return;
}
if (comp == NULL) {
comp = un_sort_std_comp_proc;
}
if (size == 2) {
if (comp(element_size, ((u8*)data) + start * element_size, ((u8*)data) + (stop - 1) * element_size) > 0) {
sort_swap(data, element_size, start, stop - 1);
}
return;
}
talloc = un_alloc_temp_get();
// u64 pivot_index = start + (stop - start) / 2; // center
pivot_index = stop - 1;
pivot = (u8*)un_memory_alloc(element_size, talloc);
memcpy(pivot, (u8*)data + pivot_index * element_size, element_size);
begin_index = start;
end_index = stop - 1;
while (begin_index < end_index) {
begin = ((u8*)data) + begin_index * element_size;
end = ((u8*)data) + end_index * element_size;
if (comp(element_size, begin, pivot) < 0) {
begin_index++;
continue;
}
if (comp(element_size, end, pivot) > 0) {
end_index--;
continue;
}
if (comp(element_size, begin, end) == 0) {
begin_index++;
end_index--;
continue;
}
sort_swap(data, element_size, begin_index, end_index);
if (begin_index == pivot_index) {
pivot_index = end_index;
} else if (end_index == pivot_index) {
pivot_index = begin_index;
}
}
un_sort_quick(data, element_size, start, pivot_index, comp);
un_sort_quick(data, element_size, pivot_index + 1, stop, comp);
}
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