rays/MurmurHash3PHP
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Created new 128 bit and 32 bit hasing functions in php. Aliased original function to the new 128 bit function.

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This commit is contained in:
Matthew Crenshaw 2014-01-14 17:14:36 -05:00
parent df1bfadab7
commit 8ff7c3b067
2 changed files with 41 additions and 10 deletions
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46
php_murmurhash3.cpp
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@ -28,11 +28,14 @@ extern "C" {
#include "MurmurHash3.h" #include "MurmurHash3.h"
#define MURMURHASH3_OUTPUT_LENGTH 16 #define MURMURHASH3_128_OUTPUT_LENGTH 16
#define MURMURHASH3_32_OUTPUT_LENGTH 4
static function_entry murmurhash3_functions[] = { static function_entry murmurhash3_functions[] = {
PHP_FE(murmurhash3, NULL) ZEND_FALIAS(murmurhash3, murmurhash3_128, NULL)
ZEND_FE(murmurhash3_128, NULL)
ZEND_FE(murmurhash3_32, NULL)
{NULL, NULL, NULL} {NULL, NULL, NULL}
}; };
@ -68,13 +71,13 @@ void c2h(uint8_t c, char *r)
r[1] = hex[c % 16]; r[1] = hex[c % 16];
} }
PHP_FUNCTION(murmurhash3) ZEND_FUNCTION(murmurhash3_128)
{ {
char *key; char *key;
int key_len; int key_len;
long seed; long seed;
char output[MURMURHASH3_OUTPUT_LENGTH + 1]; char output[MURMURHASH3_128_OUTPUT_LENGTH + 1];
char result[MURMURHASH3_OUTPUT_LENGTH * 2 + 1]; char result[MURMURHASH3_128_OUTPUT_LENGTH * 2 + 1];
// Parse the input parameters // Parse the input parameters
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sl", &key, &key_len, &seed) == FAILURE) { if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sl", &key, &key_len, &seed) == FAILURE) {
@ -83,13 +86,40 @@ PHP_FUNCTION(murmurhash3)
// Calculate the hash // Calculate the hash
MurmurHash3_x64_128 ( key, key_len, (uint32_t)seed, output ); MurmurHash3_x64_128 ( key, key_len, (uint32_t)seed, output );
output[MURMURHASH3_OUTPUT_LENGTH] = 0; output[MURMURHASH3_128_OUTPUT_LENGTH] = 0;
// Convert to HEX // Convert to HEX
for (int i=0; i<MURMURHASH3_OUTPUT_LENGTH; i++) { for (int i=0; i<MURMURHASH3_128_OUTPUT_LENGTH; i++) {
c2h(output[i], &result[i*2]); c2h(output[i], &result[i*2]);
} }
result[MURMURHASH3_OUTPUT_LENGTH * 2] = 0; result[MURMURHASH3_128_OUTPUT_LENGTH * 2] = 0;
// Return the result
RETURN_STRING(result, 1);
}
ZEND_FUNCTION(murmurhash3_32)
{
char *key;
int key_len;
long seed;
char output[MURMURHASH3_32_OUTPUT_LENGTH + 1];
char result[MURMURHASH3_32_OUTPUT_LENGTH * 2 + 1];
// Parse the input parameters
if (zend_parse_parameters(ZEND_NUM_ARGS() TSRMLS_CC, "sl", &key, &key_len, &seed) == FAILURE) {
RETURN_NULL();
}
// Calculate the hash
MurmurHash3_x86_32 ( key, key_len, (uint32_t)seed, output );
output[MURMURHASH3_32_OUTPUT_LENGTH] = 0;
// Convert to HEX
for (int i=0; i<MURMURHASH3_32_OUTPUT_LENGTH; i++) {
c2h(output[i], &result[i*2]);
}
result[MURMURHASH3_32_OUTPUT_LENGTH * 2] = 0;
// Return the result // Return the result
RETURN_STRING(result, 1); RETURN_STRING(result, 1);

5
php_murmurhash3.h
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@ -20,10 +20,11 @@
#ifndef PHP_MURMURHASH3_H #ifndef PHP_MURMURHASH3_H
#define PHP_MURMURHASH3_H 1 #define PHP_MURMURHASH3_H 1
#define PHP_MURMURHASH3_VERSION "0.1" #define PHP_MURMURHASH3_VERSION "0.3"
#define PHP_MURMURHASH3_EXTNAME "murmurhash3" #define PHP_MURMURHASH3_EXTNAME "murmurhash3"
PHP_FUNCTION(murmurhash3); ZEND_FUNCTION(murmurhash3_128);
ZEND_FUNCTION(murmurhash3_32);
extern zend_module_entry murmurhash3_module_entry; extern zend_module_entry murmurhash3_module_entry;
#define phpext_murmurhash3_ptr &murmurhash3_module_entry #define phpext_murmurhash3_ptr &murmurhash3_module_entry