Imported from /home/lorry/working-area/delta_php2/php-5.4.13.tar.bz2.HEADphp-5.4.13master

1 files changed, 102 insertions, 0 deletions

diff --git a/ext/hash/hash_crc32.c b/ext/hash/hash_crc32.c
new file mode 100644
index 0000000..9be5b4b
--- /dev/null
+++ b/ext/hash/hash_crc32.c
@@ -0,0 +1,102 @@
+/*
+  +----------------------------------------------------------------------+
+  | PHP Version 5                                                        |
+  +----------------------------------------------------------------------+
+  | Copyright (c) 1997-2013 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>                              |
+  +----------------------------------------------------------------------+
+*/
+
+/* $Id$ */
+
+#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;
+}
+
+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 = {
+	(php_hash_init_func_t) PHP_CRC32Init,
+	(php_hash_update_func_t) PHP_CRC32Update,
+	(php_hash_final_func_t) PHP_CRC32Final,
+	(php_hash_copy_func_t) PHP_CRC32Copy,
+	4, /* what to say here? */
+	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,
+	(php_hash_copy_func_t) PHP_CRC32Copy,
+	4, /* what to say here? */
+	4,
+	sizeof(PHP_CRC32_CTX)
+};
+
+/*
+ * Local variables:
+ * tab-width: 4
+ * c-basic-offset: 4
+ * End:
+ * vim600: sw=4 ts=4 fdm=marker
+ * vim<600: sw=4 ts=4
+ */