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|
/*
+----------------------------------------------------------------------+
| Copyright (c) The PHP Group |
+----------------------------------------------------------------------+
| This source file is subject to version 3.01 of the PHP license, |
| that is bundled with this package in the file LICENSE, and is |
| available through the world-wide-web at the following url: |
| http://www.php.net/license/3_01.txt |
| If you did not receive a copy of the PHP license and are unable to |
| obtain it through the world-wide-web, please send a note to |
| license@php.net so we can mail you a copy immediately. |
+----------------------------------------------------------------------+
| Authors: Michael Wallner <mike@php.net> |
| Sara Golemon <pollita@php.net> |
+----------------------------------------------------------------------+
*/
#include "php_hash.h"
#include "php_hash_crc32.h"
#include "php_hash_crc32_tables.h"
#include "ext/standard/crc32_x86.h"
PHP_HASH_API void PHP_CRC32Init(PHP_CRC32_CTX *context, ZEND_ATTRIBUTE_UNUSED HashTable *args)
{
context->state = ~0;
}
PHP_HASH_API void PHP_CRC32Update(PHP_CRC32_CTX *context, const unsigned char *input, size_t len)
{
size_t i = 0;
#if ZEND_INTRIN_SSE4_2_PCLMUL_NATIVE || ZEND_INTRIN_SSE4_2_PCLMUL_RESOLVER
i += crc32_x86_simd_update(X86_CRC32, &context->state, input, len);
#endif
for (; 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 = 0;
#if ZEND_INTRIN_SSE4_2_PCLMUL_NATIVE || ZEND_INTRIN_SSE4_2_PCLMUL_RESOLVER
i += crc32_x86_simd_update(X86_CRC32B, &context->state, input, len);
#endif
for (; i < len; ++i) {
context->state = (context->state >> 8) ^ crc32b_table[(context->state ^ input[i]) & 0xff];
}
}
PHP_HASH_API void PHP_CRC32CUpdate(PHP_CRC32_CTX *context, const unsigned char *input, size_t len)
{
size_t i = 0;
#if ZEND_INTRIN_SSE4_2_PCLMUL_NATIVE || ZEND_INTRIN_SSE4_2_PCLMUL_RESOLVER
i += crc32_x86_simd_update(X86_CRC32C, &context->state, input, len);
#endif
for (; i < len; ++i) {
context->state = (context->state >> 8) ^ crc32c_table[(context->state ^ input[i]) & 0xff];
}
}
PHP_HASH_API void PHP_CRC32LEFinal(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_CRC32BEFinal(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;
}
PHP_HASH_API int PHP_CRC32Copy(const php_hash_ops *ops, PHP_CRC32_CTX *orig_context, PHP_CRC32_CTX *copy_context)
{
copy_context->state = orig_context->state;
return SUCCESS;
}
const php_hash_ops php_hash_crc32_ops = {
"crc32",
(php_hash_init_func_t) PHP_CRC32Init,
(php_hash_update_func_t) PHP_CRC32Update,
(php_hash_final_func_t) PHP_CRC32LEFinal,
(php_hash_copy_func_t) PHP_CRC32Copy,
php_hash_serialize,
php_hash_unserialize,
PHP_CRC32_SPEC,
4, /* what to say here? */
4,
sizeof(PHP_CRC32_CTX),
0
};
const php_hash_ops php_hash_crc32b_ops = {
"crc32b",
(php_hash_init_func_t) PHP_CRC32Init,
(php_hash_update_func_t) PHP_CRC32BUpdate,
(php_hash_final_func_t) PHP_CRC32BEFinal,
(php_hash_copy_func_t) PHP_CRC32Copy,
php_hash_serialize,
php_hash_unserialize,
PHP_CRC32_SPEC,
4, /* what to say here? */
4,
sizeof(PHP_CRC32_CTX),
0
};
const php_hash_ops php_hash_crc32c_ops = {
"crc32c",
(php_hash_init_func_t) PHP_CRC32Init,
(php_hash_update_func_t) PHP_CRC32CUpdate,
(php_hash_final_func_t) PHP_CRC32BEFinal,
(php_hash_copy_func_t) PHP_CRC32Copy,
php_hash_serialize,
php_hash_unserialize,
PHP_CRC32_SPEC,
4, /* what to say here? */
4,
sizeof(PHP_CRC32_CTX),
0
};
|
