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c_src/nif/crc_algorithm_fast.c.h
// -*- mode: c++; tab-width: 4; indent-tabs-mode: nil; st-rulers: [132] -*-
// vim: ts=4 sw=4 ft=c++ et
/* crc_algorithm_init_fast/2 */
static int crc_algorithm_uint8_init_fast(const crc_model_uint8_t *model, uint8_t *value);
static int crc_algorithm_uint16_init_fast(const crc_model_uint16_t *model, uint16_t *value);
static int crc_algorithm_uint32_init_fast(const crc_model_uint32_t *model, uint32_t *value);
static int crc_algorithm_uint64_init_fast(const crc_model_uint64_t *model, uint64_t *value);
#define CRC_ALGORITHM_INIT_FAST_DEF(type) \
inline int crc_algorithm_##type##_init_fast(const crc_model_##type##_t *model, type##_t *value) \
{ \
type##_t crc; \
crc = model->init; \
*value = crc; \
return 1; \
}
CRC_ALGORITHM_INIT_FAST_DEF(uint8)
CRC_ALGORITHM_INIT_FAST_DEF(uint16)
CRC_ALGORITHM_INIT_FAST_DEF(uint32)
CRC_ALGORITHM_INIT_FAST_DEF(uint64)
#undef CRC_ALGORITHM_INIT_FAST_DEF
/* crc_algorithm_update_fast/4 */
static int crc_algorithm_uint8_update_fast(const crc_model_uint8_t *model, const uint8_t *buf, size_t len, uint8_t *value);
static int crc_algorithm_uint16_update_fast(const crc_model_uint16_t *model, const uint8_t *buf, size_t len, uint16_t *value);
static int crc_algorithm_uint32_update_fast(const crc_model_uint32_t *model, const uint8_t *buf, size_t len, uint32_t *value);
static int crc_algorithm_uint64_update_fast(const crc_model_uint64_t *model, const uint8_t *buf, size_t len, uint64_t *value);
#define CRC_ALGORITHM_UPDATE_FAST_DEF(type) \
inline int crc_algorithm_##type##_update_fast(const crc_model_##type##_t *model, const uint8_t *buf, size_t len, \
type##_t *value) \
{ \
type##_t crc = *value; \
unsigned int tbl_index; \
if (model->refin) { \
crc = crc_algorithm_##type##_reflect(crc, model->width); \
while (len--) { \
tbl_index = (crc ^ *buf++) & 0xff; \
crc = ((crc >> 8) ^ model->table[tbl_index]) & model->crc_mask; \
} \
crc = crc_algorithm_##type##_reflect(crc, model->width) & model->crc_mask; \
} else { \
crc = crc << model->crc_shift; \
while (len--) { \
tbl_index = ((crc >> (model->width - 8 + model->crc_shift)) ^ *buf++) & 0xff; \
crc = ((crc << (8 - model->crc_shift)) ^ (model->table[tbl_index] << model->crc_shift)) & \
(model->crc_mask << model->crc_shift); \
} \
crc = crc >> model->crc_shift; \
} \
*value = crc; \
return 1; \
}
CRC_ALGORITHM_UPDATE_FAST_DEF(uint8)
CRC_ALGORITHM_UPDATE_FAST_DEF(uint16)
CRC_ALGORITHM_UPDATE_FAST_DEF(uint32)
CRC_ALGORITHM_UPDATE_FAST_DEF(uint64)
#undef CRC_ALGORITHM_UPDATE_FAST_DEF
/* crc_algorithm_final_fast/2 */
static int crc_algorithm_uint8_final_fast(const crc_model_uint8_t *model, uint8_t *value);
static int crc_algorithm_uint16_final_fast(const crc_model_uint16_t *model, uint16_t *value);
static int crc_algorithm_uint32_final_fast(const crc_model_uint32_t *model, uint32_t *value);
static int crc_algorithm_uint64_final_fast(const crc_model_uint64_t *model, uint64_t *value);
#define CRC_ALGORITHM_FINAL_FAST_DEF(type) \
inline int crc_algorithm_##type##_final_fast(const crc_model_##type##_t *model, type##_t *value) \
{ \
type##_t crc = *value; \
if (model->refout) { \
crc = crc_algorithm_##type##_reflect(crc, model->width); \
} \
*value = crc ^ model->xorout; \
return 1; \
}
CRC_ALGORITHM_FINAL_FAST_DEF(uint8)
CRC_ALGORITHM_FINAL_FAST_DEF(uint16)
CRC_ALGORITHM_FINAL_FAST_DEF(uint32)
CRC_ALGORITHM_FINAL_FAST_DEF(uint64)
#undef CRC_ALGORITHM_FINAL_FAST_DEF