88 lines
2.0 KiB
C
88 lines
2.0 KiB
C
#ifndef MODIFIERS_H_
|
|
#define MODIFIERS_H_
|
|
|
|
#include "defs.h"
|
|
#include <string.h>
|
|
|
|
typedef struct {
|
|
size_t byte_length;
|
|
uint8_t *bits;
|
|
} ModifierSet;
|
|
|
|
#define EMPTY_MODIFIER_SET ((ModifierSet) {.byte_length = 0, .bits = NULL})
|
|
|
|
__attribute__((unused)) inline static ModifierSet
|
|
modifier_set_copy(const ModifierSet old)
|
|
{
|
|
ModifierSet result = old;
|
|
result.bits = malloc(result.byte_length);
|
|
if (!result.bits) {
|
|
result.byte_length = 0;
|
|
return result;
|
|
}
|
|
memcpy(result.bits, old.bits, result.byte_length);
|
|
return result;
|
|
}
|
|
|
|
__attribute__((unused)) inline static void
|
|
modifier_set_destruct(ModifierSet * old)
|
|
{
|
|
if (old->bits) {
|
|
free(old->bits);
|
|
}
|
|
old->bits = NULL;
|
|
old->byte_length = 0;
|
|
}
|
|
|
|
__attribute__((unused)) inline static bool
|
|
modifier_set_extend(ModifierSet * old, size_t new_byte_length)
|
|
{
|
|
if (new_byte_length > old->byte_length) {
|
|
uint8_t *bits = realloc(old->bits, new_byte_length);
|
|
if (!bits) {
|
|
return false;
|
|
}
|
|
memset(bits + old->byte_length, 0, new_byte_length - old->byte_length);
|
|
old->bits = bits;
|
|
old->byte_length = new_byte_length;
|
|
}
|
|
return true;
|
|
}
|
|
|
|
__attribute__((unused)) inline static void
|
|
modifier_set_set_from(ModifierSet * target, const ModifierSet source)
|
|
{
|
|
modifier_set_extend(target, source.byte_length);
|
|
for (size_t i = 0; i < target->byte_length; ++i) {
|
|
if (i >= source.byte_length) {
|
|
return;
|
|
}
|
|
target->bits[i] |= source.bits[i];
|
|
}
|
|
}
|
|
|
|
__attribute__((unused)) inline static void
|
|
modifier_set_unset_from(ModifierSet * target, const ModifierSet source)
|
|
{
|
|
for (size_t i = 0; i < target->byte_length; ++i) {
|
|
if (i >= source.byte_length) {
|
|
return;
|
|
}
|
|
target->bits[i] &= ~source.bits[i];
|
|
}
|
|
}
|
|
|
|
__attribute__((unused)) inline static void
|
|
modifier_set_toggle_from(ModifierSet * target, const ModifierSet source)
|
|
{
|
|
modifier_set_extend(target, source.byte_length);
|
|
for (size_t i = 0; i < target->byte_length; ++i) {
|
|
if (i >= source.byte_length) {
|
|
return;
|
|
}
|
|
target->bits[i] ^= source.bits[i];
|
|
}
|
|
}
|
|
|
|
#endif /* end of include guard: MODIFIERS_H_ */
|