thodg/libgit2/src/hash/hash_common_crypto.c

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• Hash : bd48bf3f
  Author :
  Date : 2019-06-14T14:21:32
  

  hash: introduce source files to break include circles
  
  The hash source files have circular include dependencies right
  now, which shows by our broken generic hash implementation. The
  "hash.h" header declares two functions and the `git_hash_ctx`
  typedef before actually including the hash backend header and can
  only declare the remaining hash functions after the include due
  to possibly static function declarations inside of the
  implementation includes.
  
  Let's break this cycle and help maintainability by creating a
  real implementation file for each of the hash implementations.
  Instead of relying on the exact include order, we now especially
  avoid the use of `GIT_INLINE` for function declarations.
  

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• src/hash/hash_common_crypto.c

• /*
   * 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.
   */
  
  #include "hash_common_crypto.h"
  
  #define CC_LONG_MAX ((CC_LONG)-1)
  
  int git_hash_global_init(void)
  {
  	return 0;
  }
  
  int git_hash_ctx_init(git_hash_ctx *ctx)
  {
  	return git_hash_init(ctx);
  }
  
  void git_hash_ctx_cleanup(git_hash_ctx *ctx)
  {
  	GIT_UNUSED(ctx);
  }
  
  int git_hash_init(git_hash_ctx *ctx)
  {
  	assert(ctx);
  	CC_SHA1_Init(&ctx->c);
  	return 0;
  }
  
  int git_hash_update(git_hash_ctx *ctx, const void *_data, size_t len)
  {
  	const unsigned char *data = _data;
  
  	assert(ctx);
  
  	while (len > 0) {
  		CC_LONG chunk = (len > CC_LONG_MAX) ? CC_LONG_MAX : (CC_LONG)len;
  
  		CC_SHA1_Update(&ctx->c, data, chunk);
  
  		data += chunk;
  		len -= chunk;
  	}
  
  	return 0;
  }
  
  int git_hash_final(git_oid *out, git_hash_ctx *ctx)
  {
  	assert(ctx);
  	CC_SHA1_Final(out->id, &ctx->c);
  	return 0;
  }
  

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