| /* |
| * 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 |