thodg/libgit2/src/zstream.h

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• Hash : d8f6fee3
  Author :
  Date : 2019-12-13T14:57:53
  

  pack: refactor unpacking of raw objects to use `git_zstream`
  
  While we do have a zstream abstraction that encapsulates all the calls
  to zlib as well as its error handling, we do not use it in our pack file
  code. Refactor it to make the code a lot easier to understand.
  

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• src/zstream.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_zstream_h__
  #define INCLUDE_zstream_h__
  
  #include "common.h"
  
  #include <zlib.h>
  
  #include "buffer.h"
  
  typedef enum {
  	GIT_ZSTREAM_INFLATE,
  	GIT_ZSTREAM_DEFLATE,
  } git_zstream_t;
  
  typedef struct {
  	z_stream z;
  	git_zstream_t type;
  	const char *in;
  	size_t in_len;
  	int flush;
  	int zerr;
  } git_zstream;
  
  #define GIT_ZSTREAM_INIT {{0}}
  
  int git_zstream_init(git_zstream *zstream, git_zstream_t type);
  void git_zstream_free(git_zstream *zstream);
  
  int git_zstream_set_input(git_zstream *zstream, const void *in, size_t in_len);
  
  size_t git_zstream_suggest_output_len(git_zstream *zstream);
  
  /* get as much output as is available in the input buffer */
  int git_zstream_get_output_chunk(
  	void *out, size_t *out_len, git_zstream *zstream);
  
  /* get all the output from the entire input buffer */
  int git_zstream_get_output(void *out, size_t *out_len, git_zstream *zstream);
  
  bool git_zstream_done(git_zstream *zstream);
  bool git_zstream_eos(git_zstream *zstream);
  
  void git_zstream_reset(git_zstream *zstream);
  
  int git_zstream_deflatebuf(git_buf *out, const void *in, size_t in_len);
  int git_zstream_inflatebuf(git_buf *out, const void *in, size_t in_len);
  
  #endif
  

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