src/TortoiseMerge/libsvn_diff/md5.h

   1 /*
   2  * md5.h: Converting and comparing MD5 checksums
   3  *
   4  * ====================================================================
   5  *    Licensed to the Apache Software Foundation (ASF) under one
   6  *    or more contributor license agreements.  See the NOTICE file
   7  *    distributed with this work for additional information
   8  *    regarding copyright ownership.  The ASF licenses this file
   9  *    to you under the Apache License, Version 2.0 (the
  10  *    "License"); you may not use this file except in compliance
  11  *    with the License.  You may obtain a copy of the License at
  12  *
  13  *      http://www.apache.org/licenses/LICENSE-2.0
  14  *
  15  *    Unless required by applicable law or agreed to in writing,
  16  *    software distributed under the License is distributed on an
  17  *    "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
  18  *    KIND, either express or implied.  See the License for the
  19  *    specific language governing permissions and limitations
  20  *    under the License.
  21  * ====================================================================
  22  */
  23
  24 #ifndef SVN_LIBSVN_SUBR_MD5_H
  25 #define SVN_LIBSVN_SUBR_MD5_H
  26
  27 #include <apr_pools.h>
  28
  29 #include "svn_types.h"
  30
  31 #ifdef __cplusplus
  32 extern "C" {
  33 #endif /* __cplusplus */
  34
  35 \f
  36
  37 /* The MD5 digest for the empty string. */
  38 const unsigned char *
  39 svn_md5__empty_string_digest(void);
  40
  41
  42 /* Return the hex representation of DIGEST, which must be
  43  * APR_MD5_DIGESTSIZE bytes long, allocating the string in POOL.
  44  */
  45 const char *
  46 svn_md5__digest_to_cstring_display(const unsigned char digest[],
  47                                    apr_pool_t *pool);
  48
  49
  50 /* Return the hex representation of DIGEST, which must be
  51  * APR_MD5_DIGESTSIZE bytes long, allocating the string in POOL.
  52  * If DIGEST is all zeros, then return NULL.
  53  */
  54 const char *
  55 svn_md5__digest_to_cstring(const unsigned char digest[],
  56                            apr_pool_t *pool);
  57
  58
  59 /** Compare digests D1 and D2, each APR_MD5_DIGESTSIZE bytes long.
  60  * If neither is all zeros, and they do not match, then return FALSE;
  61  * else return TRUE.
  62  */
  63 svn_boolean_t
  64 svn_md5__digests_match(const unsigned char d1[],
  65                         const unsigned char d2[]);
  66
  67 #ifdef __cplusplus
  68 }
  69 #endif /* __cplusplus */
  70
  71 #endif /* SVN_LIBSVN_SUBR_MD5_H */