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c_src/nif/crc_algorithm_slow.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_slow/2 */
static int crc_algorithm_uint8_init_slow(const crc_model_uint8_t *model, uint8_t *value);
static int crc_algorithm_uint16_init_slow(const crc_model_uint16_t *model, uint16_t *value);
static int crc_algorithm_uint32_init_slow(const crc_model_uint32_t *model, uint32_t *value);
static int crc_algorithm_uint64_init_slow(const crc_model_uint64_t *model, uint64_t *value);
#define CRC_ALGORITHM_INIT_SLOW_DEF(type) \
inline int crc_algorithm_##type##_init_slow(const crc_model_##type##_t *model, type##_t *value) \
{ \
type##_t crc; \
unsigned int bit; \
size_t i; \
crc = model->init; \
for (i = 0; i < model->width; i++) { \
bit = crc & 0x01; \
if (bit) { \
crc ^= model->poly; \
} \
crc >>= 1; \
if (bit) { \
crc |= model->msb_mask; \
} \
} \
crc = crc & model->crc_mask; \
*value = crc; \
return 1; \
}
CRC_ALGORITHM_INIT_SLOW_DEF(uint8)
CRC_ALGORITHM_INIT_SLOW_DEF(uint16)
CRC_ALGORITHM_INIT_SLOW_DEF(uint32)
CRC_ALGORITHM_INIT_SLOW_DEF(uint64)
#undef CRC_ALGORITHM_INIT_SLOW_DEF
/* crc_algorithm_update_slow/4 */
static int crc_algorithm_uint8_update_slow(const crc_model_uint8_t *model, const uint8_t *buf, size_t len, uint8_t *value);
static int crc_algorithm_uint16_update_slow(const crc_model_uint16_t *model, const uint8_t *buf, size_t len, uint16_t *value);
static int crc_algorithm_uint32_update_slow(const crc_model_uint32_t *model, const uint8_t *buf, size_t len, uint32_t *value);
static int crc_algorithm_uint64_update_slow(const crc_model_uint64_t *model, const uint8_t *buf, size_t len, uint64_t *value);
#define CRC_ALGORITHM_UPDATE_SLOW_DEF(type) \
inline int crc_algorithm_##type##_update_slow(const crc_model_##type##_t *model, const uint8_t *buf, size_t len, \
type##_t *value) \
{ \
type##_t reg = *value; \
bool bit; \
uint8_t octet; \
size_t i; \
while (len--) { \
octet = *buf++; \
if (model->refin) { \
octet = crc_algorithm_uint8_reflect(octet, 8); \
} \
for (i = 0; i < 8; i++) { \
bit = (reg & model->msb_mask); \
reg = ((reg << 1) & model->crc_mask) | ((octet >> (7 - i)) & 0x01); \
if (bit) { \
reg ^= model->poly; \
} \
} \
} \
*value = reg; \
return 1; \
}
CRC_ALGORITHM_UPDATE_SLOW_DEF(uint8)
CRC_ALGORITHM_UPDATE_SLOW_DEF(uint16)
CRC_ALGORITHM_UPDATE_SLOW_DEF(uint32)
CRC_ALGORITHM_UPDATE_SLOW_DEF(uint64)
#undef CRC_ALGORITHM_UPDATE_SLOW_DEF
/* crc_algorithm_final_slow/2 */
static int crc_algorithm_uint8_final_slow(const crc_model_uint8_t *model, uint8_t *value);
static int crc_algorithm_uint16_final_slow(const crc_model_uint16_t *model, uint16_t *value);
static int crc_algorithm_uint32_final_slow(const crc_model_uint32_t *model, uint32_t *value);
static int crc_algorithm_uint64_final_slow(const crc_model_uint64_t *model, uint64_t *value);
#define CRC_ALGORITHM_FINAL_SLOW_DEF(type) \
inline int crc_algorithm_##type##_final_slow(const crc_model_##type##_t *model, type##_t *value) \
{ \
type##_t reg = *value; \
bool bit; \
size_t i; \
for (i = 0; i < model->width; i++) { \
bit = (reg & model->msb_mask); \
reg = ((reg << 1) & model->crc_mask); \
if (bit) { \
reg ^= model->poly; \
} \
} \
if (model->refout) { \
reg = crc_algorithm_##type##_reflect(reg, model->width); \
} \
reg = (reg ^ model->xorout) & model->crc_mask; \
*value = reg; \
return 1; \
}
CRC_ALGORITHM_FINAL_SLOW_DEF(uint8)
CRC_ALGORITHM_FINAL_SLOW_DEF(uint16)
CRC_ALGORITHM_FINAL_SLOW_DEF(uint32)
CRC_ALGORITHM_FINAL_SLOW_DEF(uint64)
#undef CRC_ALGORITHM_FINAL_SLOW_DEF