thodg/libgit2/src/hash.h

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• Hash : 31ecaca2
  Author :
  Date : 2021-09-30T08:11:40
  

  hash: hash functions operate on byte arrays not git_oids Separate the concerns of the hash functions from the git_oid functions. The git_oid structure will need to understand either SHA1 or SHA256; the hash functions should only deal with the appropriate one of these.

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• src/hash.h

• /*
   * Copyright (C) the libgit2 contributors. All rights reserved.
   *
   * This file is part of libgit2, distributed under the GNU GPL v2 with
   * a Linking Exception. For full terms see the included COPYING file.
   */
  
  #ifndef INCLUDE_hash_h__
  #define INCLUDE_hash_h__
  
  #include "common.h"
  
  #include "git2/oid.h"
  #include "hash/sha1.h"
  
  typedef struct {
  	void *data;
  	size_t len;
  } git_buf_vec;
  
  typedef enum {
  	GIT_HASH_ALGORITHM_NONE = 0,
  	GIT_HASH_ALGORITHM_SHA1
  } git_hash_algorithm_t;
  
  typedef struct git_hash_ctx {
  	union {
  		git_hash_sha1_ctx sha1;
  	} ctx;
  	git_hash_algorithm_t algorithm;
  } git_hash_ctx;
  
  int git_hash_global_init(void);
  
  int git_hash_ctx_init(git_hash_ctx *ctx, git_hash_algorithm_t algorithm);
  void git_hash_ctx_cleanup(git_hash_ctx *ctx);
  
  int git_hash_init(git_hash_ctx *c);
  int git_hash_update(git_hash_ctx *c, const void *data, size_t len);
  int git_hash_final(unsigned char *out, git_hash_ctx *c);
  
  int git_hash_buf(unsigned char *out, const void *data, size_t len, git_hash_algorithm_t algorithm);
  int git_hash_vec(unsigned char *out, git_buf_vec *vec, size_t n, git_hash_algorithm_t algorithm);
  
  #endif
  

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