thodg/libgit2/src/hash.c

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• Hash : 40f3702c
  Author :
  Date : 2021-08-25T11:36:06
  

  c90/c99: name the unnamed union in git_hash_ctx

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• src/hash.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.h"
  
  int git_hash_global_init(void)
  {
  	return git_hash_sha1_global_init();
  }
  
  int git_hash_ctx_init(git_hash_ctx *ctx)
  {
  	int error;
  
  	if ((error = git_hash_sha1_ctx_init(&ctx->ctx.sha1)) < 0)
  		return error;
  
  	ctx->algo = GIT_HASH_ALGO_SHA1;
  
  	return 0;
  }
  
  void git_hash_ctx_cleanup(git_hash_ctx *ctx)
  {
  	switch (ctx->algo) {
  		case GIT_HASH_ALGO_SHA1:
  			git_hash_sha1_ctx_cleanup(&ctx->ctx.sha1);
  			return;
  		default:
  			/* unreachable */ ;
  	}
  }
  
  int git_hash_init(git_hash_ctx *ctx)
  {
  	switch (ctx->algo) {
  		case GIT_HASH_ALGO_SHA1:
  			return git_hash_sha1_init(&ctx->ctx.sha1);
  		default:
  			/* unreachable */ ;
  	}
  	GIT_ASSERT(0);
  	return -1;
  }
  
  int git_hash_update(git_hash_ctx *ctx, const void *data, size_t len)
  {
  	switch (ctx->algo) {
  		case GIT_HASH_ALGO_SHA1:
  			return git_hash_sha1_update(&ctx->ctx.sha1, data, len);
  		default:
  			/* unreachable */ ;
  	}
  	GIT_ASSERT(0);
  	return -1;
  }
  
  int git_hash_final(git_oid *out, git_hash_ctx *ctx)
  {
  	switch (ctx->algo) {
  		case GIT_HASH_ALGO_SHA1:
  			return git_hash_sha1_final(out, &ctx->ctx.sha1);
  		default:
  			/* unreachable */ ;
  	}
  	GIT_ASSERT(0);
  	return -1;
  }
  
  int git_hash_buf(git_oid *out, const void *data, size_t len)
  {
  	git_hash_ctx ctx;
  	int error = 0;
  
  	if (git_hash_ctx_init(&ctx) < 0)
  		return -1;
  
  	if ((error = git_hash_update(&ctx, data, len)) >= 0)
  		error = git_hash_final(out, &ctx);
  
  	git_hash_ctx_cleanup(&ctx);
  
  	return error;
  }
  
  int git_hash_vec(git_oid *out, git_buf_vec *vec, size_t n)
  {
  	git_hash_ctx ctx;
  	size_t i;
  	int error = 0;
  
  	if (git_hash_ctx_init(&ctx) < 0)
  		return -1;
  
  	for (i = 0; i < n; i++) {
  		if ((error = git_hash_update(&ctx, vec[i].data, vec[i].len)) < 0)
  			goto done;
  	}
  
  	error = git_hash_final(out, &ctx);
  
  done:
  	git_hash_ctx_cleanup(&ctx);
  
  	return error;
  }
  

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