1.1 --- /dev/null Thu Jan 01 00:00:00 1970 +0000
1.2 +++ b/gfx/skia/trunk/src/utils/SkMD5.h Wed Dec 31 06:09:35 2014 +0100
1.3 @@ -0,0 +1,55 @@
1.4 +/*
1.5 + * Copyright 2012 Google Inc.
1.6 + *
1.7 + * Use of this source code is governed by a BSD-style license that can be
1.8 + * found in the LICENSE file.
1.9 + */
1.10 +
1.11 +#ifndef SkMD5_DEFINED
1.12 +#define SkMD5_DEFINED
1.13 +
1.14 +#include "SkTypes.h"
1.15 +#include "SkEndian.h"
1.16 +#include "SkStream.h"
1.17 +
1.18 +//The following macros can be defined to affect the MD5 code generated.
1.19 +//SK_MD5_CLEAR_DATA causes all intermediate state to be overwritten with 0's.
1.20 +//SK_CPU_LENDIAN allows 32 bit <=> 8 bit conversions without copies (if alligned).
1.21 +//SK_CPU_FAST_UNALIGNED_ACCESS allows 32 bit <=> 8 bit conversions without copies if SK_CPU_LENDIAN.
1.22 +
1.23 +class SkMD5 : public SkWStream {
1.24 +public:
1.25 + SkMD5();
1.26 +
1.27 + /** Processes input, adding it to the digest.
1.28 + * Note that this treats the buffer as a series of uint8_t values.
1.29 + */
1.30 + virtual bool write(const void* buffer, size_t size) SK_OVERRIDE {
1.31 + this->update(reinterpret_cast<const uint8_t*>(buffer), size);
1.32 + return true;
1.33 + }
1.34 +
1.35 + virtual size_t bytesWritten() const SK_OVERRIDE { return SkToSizeT(this->byteCount); }
1.36 +
1.37 + /** Processes input, adding it to the digest. Calling this after finish is undefined. */
1.38 + void update(const uint8_t* input, size_t length);
1.39 +
1.40 + struct Digest {
1.41 + uint8_t data[16];
1.42 + };
1.43 +
1.44 + /** Computes and returns the digest. */
1.45 + void finish(Digest& digest);
1.46 +
1.47 +private:
1.48 + // number of bytes, modulo 2^64
1.49 + uint64_t byteCount;
1.50 +
1.51 + // state (ABCD)
1.52 + uint32_t state[4];
1.53 +
1.54 + // input buffer
1.55 + uint8_t buffer[64];
1.56 +};
1.57 +
1.58 +#endif
