src/hash.h

   1 /*
   2  * Copyright (C) the libgit2 contributors. All rights reserved.
   3  *
   4  * This file is part of libgit2, distributed under the GNU GPL v2 with
   5  * a Linking Exception. For full terms see the included COPYING file.
   6  */
   7
   8 #ifndef INCLUDE_hash_h__
   9 #define INCLUDE_hash_h__
  10
  11 #include "common.h"
  12
  13 #include "hash/sha1.h"
  14
  15 typedef struct {
  16         void *data;
  17         size_t len;
  18 } git_str_vec;
  19
  20 typedef enum {
  21         GIT_HASH_ALGORITHM_NONE = 0,
  22         GIT_HASH_ALGORITHM_SHA1
  23 } git_hash_algorithm_t;
  24
  25 typedef struct git_hash_ctx {
  26         union {
  27                 git_hash_sha1_ctx sha1;
  28         } ctx;
  29         git_hash_algorithm_t algorithm;
  30 } git_hash_ctx;
  31
  32 int git_hash_global_init(void);
  33
  34 int git_hash_ctx_init(git_hash_ctx *ctx, git_hash_algorithm_t algorithm);
  35 void git_hash_ctx_cleanup(git_hash_ctx *ctx);
  36
  37 int git_hash_init(git_hash_ctx *c);
  38 int git_hash_update(git_hash_ctx *c, const void *data, size_t len);
  39 int git_hash_final(unsigned char *out, git_hash_ctx *c);
  40
  41 int git_hash_buf(unsigned char *out, const void *data, size_t len, git_hash_algorithm_t algorithm);
  42 int git_hash_vec(unsigned char *out, git_str_vec *vec, size_t n, git_hash_algorithm_t algorithm);
  43
  44 int git_hash_fmt(char *out, unsigned char *hash, size_t hash_len);
  45
  46 #endif