thodg/libgit2/src/diff_patch.h

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• Hash : 114f5a6c
  Author :
  Date : 2013-06-10T10:10:39
  

  Reorganize diff and add basic diff driver
  
  This is a significant reorganization of the diff code to break it
  into a set of more clearly distinct files and to document the new
  organization.  Hopefully this will make the diff code easier to
  understand and to extend.
  
  This adds a new `git_diff_driver` object that looks of diff driver
  information from the attributes and the config so that things like
  function content in diff headers can be provided.  The full driver
  spec is not implemented in the commit - this is focused on the
  reorganization of the code and putting the driver hooks in place.
  
  This also removes a few #includes from src/repository.h that were
  overbroad, but as a result required extra #includes in a variety
  of places since including src/repository.h no longer results in
  pulling in the whole world.
  

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• src/diff_patch.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_diff_patch_h__
  #define INCLUDE_diff_patch_h__
  
  #include "common.h"
  #include "diff.h"
  #include "diff_file.h"
  #include "array.h"
  
  /* cached information about a single span in a diff */
  typedef struct diff_patch_line diff_patch_line;
  struct diff_patch_line {
  	const char *ptr;
  	size_t len;
  	size_t lines, oldno, newno;
  	char origin;
  };
  
  /* cached information about a hunk in a diff */
  typedef struct diff_patch_hunk diff_patch_hunk;
  struct diff_patch_hunk {
  	git_diff_range range;
  	char   header[128];
  	size_t header_len;
  	size_t line_start;
  	size_t line_count;
  };
  
  struct git_diff_patch {
  	git_refcount rc;
  	git_diff_list *diff; /* for refcount purposes, maybe NULL for blob diffs */
  	git_diff_delta *delta;
  	size_t delta_index;
  	git_diff_file_content ofile;
  	git_diff_file_content nfile;
  	uint32_t flags;
  	git_array_t(diff_patch_hunk) hunks;
  	git_array_t(diff_patch_line) lines;
  	size_t oldno, newno;
  	size_t content_size;
  	git_pool flattened;
  };
  
  enum {
  	GIT_DIFF_PATCH_ALLOCATED   = (1 << 0),
  	GIT_DIFF_PATCH_INITIALIZED = (1 << 1),
  	GIT_DIFF_PATCH_LOADED      = (1 << 2),
  	GIT_DIFF_PATCH_DIFFABLE    = (1 << 3),
  	GIT_DIFF_PATCH_DIFFED      = (1 << 4),
  	GIT_DIFF_PATCH_FLATTENED   = (1 << 5),
  };
  
  typedef struct git_diff_output git_diff_output;
  struct git_diff_output {
  	/* these callbacks are issued with the diff data */
  	git_diff_file_cb file_cb;
  	git_diff_hunk_cb hunk_cb;
  	git_diff_data_cb data_cb;
  	void *payload;
  
  	/* this records the actual error in cases where it may be obscured */
  	int error;
  
  	/* this callback is used to do the diff and drive the other callbacks.
  	 * see diff_xdiff.h for how to use this in practice for now.
  	 */
  	int (*diff_cb)(git_diff_output *output, git_diff_patch *patch);
  };
  
  #endif
  

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