/* * Copyright 2012 Google Inc. * * Use of this source code is governed by a BSD-style license that can be * found in the LICENSE file. */ #ifndef SkMD5_DEFINED #define SkMD5_DEFINED #include "include/core/SkStream.h" #include "include/private/SkTo.h" /* Calculate a 128-bit MD5 message-digest of the bytes sent to this stream. */ class SkMD5 : public SkWStream { public: SkMD5(); /** Processes input, adding it to the digest. Calling this after finish is undefined. */ bool write(const void* buffer, size_t size) final; size_t bytesWritten() const final { return SkToSizeT(this->byteCount); } struct Digest { uint8_t data[16]; bool operator ==(Digest const& other) const { return 0 == memcmp(data, other.data, sizeof(data)); } bool operator !=(Digest const& other) const { return !(*this == other); } }; /** Computes and returns the digest. */ Digest finish(); private: uint64_t byteCount; // number of bytes, modulo 2^64 uint32_t state[4]; // state (ABCD) uint8_t buffer[64]; // input buffer }; #endif