/src/core/HashUtils.cpp
http://github.com/imageworks/OpenColorIO · C++ · 71 lines · 32 code · 10 blank · 29 comment · 1 complexity · 88b85c182ff0b579c02226caf69da55e MD5 · raw file
- /*
- Copyright (c) 2003-2010 Sony Pictures Imageworks Inc., et al.
- All Rights Reserved.
- Redistribution and use in source and binary forms, with or without
- modification, are permitted provided that the following conditions are
- met:
- * Redistributions of source code must retain the above copyright
- notice, this list of conditions and the following disclaimer.
- * 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.
- * Neither the name of Sony Pictures Imageworks nor the names of its
- contributors may be used to endorse or promote products derived from
- this software without specific prior written permission.
- THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- "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 COPYRIGHT
- OWNER OR CONTRIBUTORS 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.
- */
- #include <OpenColorIO/OpenColorIO.h>
- #include "HashUtils.h"
- #include "md5/md5.h"
- #include <sstream>
- #include <iostream>
- OCIO_NAMESPACE_ENTER
- {
- std::string CacheIDHash(const char * array, int size)
- {
- md5_state_t state;
- md5_byte_t digest[16];
-
- md5_init(&state);
- md5_append(&state, (const md5_byte_t *)array, size);
- md5_finish(&state, digest);
-
- return GetPrintableHash(digest);
- }
-
- std::string GetPrintableHash(const md5_byte_t * digest)
- {
- static char charmap[] = "0123456789abcdef";
-
- char printableResult[34];
- char *ptr = printableResult;
-
- // build a printable string from unprintable chars. first character
- // of hashed cache IDs is '$', to later check if it's already been hashed
- *ptr++ = '$';
- for (int i=0;i<16;++i)
- {
- *ptr++ = charmap[(digest[i] & 0x0F)];
- *ptr++ = charmap[(digest[i] >> 4)];
- }
- *ptr++ = 0;
-
- return std::string(printableResult);
- }
- }
- OCIO_NAMESPACE_EXIT