/*
 * LIBOIL - Library of Optimized Inner Loops
 * Copyright (c) 2004 David A. Schleef <ds@schleef.org>
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */
//Portions Copyright (c)  2008-2009 Nokia Corporation and/or its subsidiary(-ies). All rights reserved. 

#ifdef HAVE_CONFIG_H
#include "config.h"
#endif

#include <liboil/liboil.h>
#include "md5.h"


/**
 * oil_md5:
 * @i_4:
 * @s_16:
 *
 * Performs an MD5 checksum iteration.  The iteration operates on
 * the 64 bytes contained in @s_16, and changes the hash contained
 * in @i_4.  This only implements a portion of the MD5 algorithm.
 * The full MD5 algorithm requires initializing the hash
 * with a specific value and additional handling of bytes at the
 * end of the stream.
 *
 * See also the md5 example in the Liboil source code.
 *
 * FIXME: need a reference here
 */
OIL_DEFINE_CLASS (md5, "uint32_t *i_4, uint32_t *s_16");

#ifdef WORDS_BIGENDIAN
#define uint32_to_host(a) \
  ((((a)&0xff)<<24)|(((a)&0xff00)<<8)|(((a)&0xff0000)>>8)|(((a)>>24)&0xff))
#else
#define uint32_to_host(a) (a)
#endif

#define F1(x, y, z) (z ^ (x & (y ^ z)))
#define F2(x, y, z) F1(z, x, y)
#define F3(x, y, z) (x ^ y ^ z)
#define F4(x, y, z) (y ^ (x | ~z))

#define MD5STEP(f,w,x,y,z,in,offset,s) \
  (w += f(x,y,z) + uint32_to_host(in) + offset, w = (w<<s | w>>(32-s)) + x)


static void
md5_c(uint32_t *state, uint32_t *src)
{
  uint32_t a,b,c,d;

  a = state[0];
  b = state[1];
  c = state[2];
  d = state[3];

  MD5STEP(F1, a, b, c, d, src[0], 0xd76aa478, 7);
  MD5STEP(F1, d, a, b, c, src[1], 0xe8c7b756, 12);
  MD5STEP(F1, c, d, a, b, src[2], 0x242070db, 17);
  MD5STEP(F1, b, c, d, a, src[3], 0xc1bdceee, 22);
  MD5STEP(F1, a, b, c, d, src[4], 0xf57c0faf, 7);
  MD5STEP(F1, d, a, b, c, src[5], 0x4787c62a, 12);
  MD5STEP(F1, c, d, a, b, src[6], 0xa8304613, 17);
  MD5STEP(F1, b, c, d, a, src[7], 0xfd469501, 22);
  MD5STEP(F1, a, b, c, d, src[8], 0x698098d8, 7);
  MD5STEP(F1, d, a, b, c, src[9], 0x8b44f7af, 12);
  MD5STEP(F1, c, d, a, b, src[10], 0xffff5bb1, 17);
  MD5STEP(F1, b, c, d, a, src[11], 0x895cd7be, 22);
  MD5STEP(F1, a, b, c, d, src[12], 0x6b901122, 7);
  MD5STEP(F1, d, a, b, c, src[13], 0xfd987193, 12);
  MD5STEP(F1, c, d, a, b, src[14], 0xa679438e, 17);
  MD5STEP(F1, b, c, d, a, src[15], 0x49b40821, 22);

  MD5STEP(F2, a, b, c, d, src[1], 0xf61e2562, 5);
  MD5STEP(F2, d, a, b, c, src[6], 0xc040b340, 9);
  MD5STEP(F2, c, d, a, b, src[11], 0x265e5a51, 14);
  MD5STEP(F2, b, c, d, a, src[0], 0xe9b6c7aa, 20);
  MD5STEP(F2, a, b, c, d, src[5], 0xd62f105d, 5);
  MD5STEP(F2, d, a, b, c, src[10], 0x02441453, 9);
  MD5STEP(F2, c, d, a, b, src[15], 0xd8a1e681, 14);
  MD5STEP(F2, b, c, d, a, src[4], 0xe7d3fbc8, 20);
  MD5STEP(F2, a, b, c, d, src[9], 0x21e1cde6, 5);
  MD5STEP(F2, d, a, b, c, src[14], 0xc33707d6, 9);
  MD5STEP(F2, c, d, a, b, src[3], 0xf4d50d87, 14);
  MD5STEP(F2, b, c, d, a, src[8], 0x455a14ed, 20);
  MD5STEP(F2, a, b, c, d, src[13], 0xa9e3e905, 5);
  MD5STEP(F2, d, a, b, c, src[2], 0xfcefa3f8, 9);
  MD5STEP(F2, c, d, a, b, src[7], 0x676f02d9, 14);
  MD5STEP(F2, b, c, d, a, src[12], 0x8d2a4c8a, 20);

  MD5STEP(F3, a, b, c, d, src[5], 0xfffa3942, 4);
  MD5STEP(F3, d, a, b, c, src[8], 0x8771f681, 11);
  MD5STEP(F3, c, d, a, b, src[11], 0x6d9d6122, 16);
  MD5STEP(F3, b, c, d, a, src[14], 0xfde5380c, 23);
  MD5STEP(F3, a, b, c, d, src[1], 0xa4beea44, 4);
  MD5STEP(F3, d, a, b, c, src[4], 0x4bdecfa9, 11);
  MD5STEP(F3, c, d, a, b, src[7], 0xf6bb4b60, 16);
  MD5STEP(F3, b, c, d, a, src[10], 0xbebfbc70, 23);
  MD5STEP(F3, a, b, c, d, src[13], 0x289b7ec6, 4);
  MD5STEP(F3, d, a, b, c, src[0], 0xeaa127fa, 11);
  MD5STEP(F3, c, d, a, b, src[3], 0xd4ef3085, 16);
  MD5STEP(F3, b, c, d, a, src[6], 0x04881d05, 23);
  MD5STEP(F3, a, b, c, d, src[9], 0xd9d4d039, 4);
  MD5STEP(F3, d, a, b, c, src[12], 0xe6db99e5, 11);
  MD5STEP(F3, c, d, a, b, src[15], 0x1fa27cf8, 16);
  MD5STEP(F3, b, c, d, a, src[2], 0xc4ac5665, 23);

  MD5STEP(F4, a, b, c, d, src[0], 0xf4292244, 6);
  MD5STEP(F4, d, a, b, c, src[7], 0x432aff97, 10);
  MD5STEP(F4, c, d, a, b, src[14], 0xab9423a7, 15);
  MD5STEP(F4, b, c, d, a, src[5], 0xfc93a039, 21);
  MD5STEP(F4, a, b, c, d, src[12], 0x655b59c3, 6);
  MD5STEP(F4, d, a, b, c, src[3], 0x8f0ccc92, 10);
  MD5STEP(F4, c, d, a, b, src[10], 0xffeff47d, 15);
  MD5STEP(F4, b, c, d, a, src[1], 0x85845dd1, 21);
  MD5STEP(F4, a, b, c, d, src[8], 0x6fa87e4f, 6);
  MD5STEP(F4, d, a, b, c, src[15], 0xfe2ce6e0, 10);
  MD5STEP(F4, c, d, a, b, src[6], 0xa3014314, 15);
  MD5STEP(F4, b, c, d, a, src[13], 0x4e0811a1, 21);
  MD5STEP(F4, a, b, c, d, src[4], 0xf7537e82, 6);
  MD5STEP(F4, d, a, b, c, src[11], 0xbd3af235, 10);
  MD5STEP(F4, c, d, a, b, src[2], 0x2ad7d2bb, 15);
  MD5STEP(F4, b, c, d, a, src[9], 0xeb86d391, 21);

  state[0] += a;
  state[1] += b;
  state[2] += c;
  state[3] += d;
}


OIL_DEFINE_IMPL_REF (md5_c, md5);



#ifdef	__SYMBIAN32__
 
OilFunctionClass* __oil_function_class_md5() {
		return &_oil_function_class_md5;
}
#endif



#ifdef	__SYMBIAN32__
 
OilFunctionImpl* __oil_function_impl_md5_c() {
		return &_oil_function_impl_md5_c;
}
#endif



#ifdef	__SYMBIAN32__
 
EXPORT_C void** _oil_function_class_ptr_md5 ()	{
	oil_function_class_ptr_md5 = __oil_function_class_md5();
	return &oil_function_class_ptr_md5->func;
	}
#endif