/*
 * Copyright 1995-2016 The OpenSSL Project Authors. All Rights Reserved.
 *
 * Licensed under the OpenSSL license (the "License").  You may not use
 * this file except in compliance with the License.  You can obtain a copy
 * in the file LICENSE in the source distribution or at
 * https://www.openssl.org/source/license.html
 */
#ifdef  __cplusplus

#include <stdlib.h>
#include <string.h>
#include "openssl_md5.h"

namespace openssl {

void md5_block_data_order(MD5_CTX *c, const void *p, size_t num);

#define DATA_ORDER_IS_LITTLE_ENDIAN

#define HASH_LONG               MD5_LONG
#define HASH_CTX                MD5_CTX
#define HASH_CBLOCK             MD5_CBLOCK
#define HASH_UPDATE             MD5_Update
//#define HASH_TRANSFORM          MD5_Transform
#define HASH_FINAL              MD5_Final
#define HASH_MAKE_STRING(c,s)   do {    \
        unsigned long ll;               \
        ll=(c)->A; (void)HOST_l2c(ll,(s));      \
        ll=(c)->B; (void)HOST_l2c(ll,(s));      \
        ll=(c)->C; (void)HOST_l2c(ll,(s));      \
        ll=(c)->D; (void)HOST_l2c(ll,(s));      \
        } while (0)
#define HASH_BLOCK_DATA_ORDER   md5_block_data_order

#include "openssl_md32_common.h"

/*-
#define F(x,y,z)        (((x) & (y))  |  ((~(x)) & (z)))
#define G(x,y,z)        (((x) & (z))  |  ((y) & (~(z))))
*/

/*
 * As pointed out by Wei Dai, the above can be simplified to the code
 * below.  Wei attributes these optimizations to Peter Gutmann's
 * SHS code, and he attributes it to Rich Schroeppel.
 */
#define F(b,c,d)        ((((c) ^ (d)) & (b)) ^ (d))
#define G(b,c,d)        ((((b) ^ (c)) & (d)) ^ (c))
#define H(b,c,d)        ((b) ^ (c) ^ (d))
#define I(b,c,d)        (((~(d)) | (b)) ^ (c))

#define R0(a,b,c,d,k,s,t) { \
        a+=((k)+(t)+F((b),(c),(d))); \
        a=ROTATE(a,s); \
        a+=b; };\

#define R1(a,b,c,d,k,s,t) { \
        a+=((k)+(t)+G((b),(c),(d))); \
        a=ROTATE(a,s); \
        a+=b; };

#define R2(a,b,c,d,k,s,t) { \
        a+=((k)+(t)+H((b),(c),(d))); \
        a=ROTATE(a,s); \
        a+=b; };

#define R3(a,b,c,d,k,s,t) { \
        a+=((k)+(t)+I((b),(c),(d))); \
        a=ROTATE(a,s); \
        a+=b; };

} // namespace openssl

#endif
