#include "php_hash.h"
#include "php_hash_crc32.h"
#include "php_hash_crc32_tables.h"
PHP_HASH_API void PHP_CRC32Init(PHP_CRC32_CTX *context)
{
context->state = ~0;
}
PHP_HASH_API void PHP_CRC32Update(PHP_CRC32_CTX *context, const unsigned char *input, size_t len)
{
size_t i;
for (i = 0; i < len; ++i) {
context->state = (context->state << 8) ^ crc32_table[(context->state >> 24) ^ (input[i] & 0xff)];
}
}
PHP_HASH_API void PHP_CRC32BUpdate(PHP_CRC32_CTX *context, const unsigned char *input, size_t len)
{
size_t i;
for (i = 0; i < len; ++i) {
context->state = (context->state >> 8) ^ crc32b_table[(context->state ^ input[i]) & 0xff];
}
}
PHP_HASH_API void PHP_CRC32Final(unsigned char digest[4], PHP_CRC32_CTX *context)
{
context->state=~context->state;
digest[3] = (unsigned char) ((context->state >> 24) & 0xff);
digest[2] = (unsigned char) ((context->state >> 16) & 0xff);
digest[1] = (unsigned char) ((context->state >> 8) & 0xff);
digest[0] = (unsigned char) (context->state & 0xff);
context->state = 0;
}
PHP_HASH_API void PHP_CRC32BFinal(unsigned char digest[4], PHP_CRC32_CTX *context)
{
context->state=~context->state;
digest[0] = (unsigned char) ((context->state >> 24) & 0xff);
digest[1] = (unsigned char) ((context->state >> 16) & 0xff);
digest[2] = (unsigned char) ((context->state >> 8) & 0xff);
digest[3] = (unsigned char) (context->state & 0xff);
context->state = 0;
}
const php_hash_ops php_hash_crc32_ops = {
(php_hash_init_func_t) PHP_CRC32Init,
(php_hash_update_func_t) PHP_CRC32Update,
(php_hash_final_func_t) PHP_CRC32Final,
4,
4,
sizeof(PHP_CRC32_CTX)
};
const php_hash_ops php_hash_crc32b_ops = {
(php_hash_init_func_t) PHP_CRC32Init,
(php_hash_update_func_t) PHP_CRC32BUpdate,
(php_hash_final_func_t) PHP_CRC32BFinal,
4,
4,
sizeof(PHP_CRC32_CTX)
};