thodg/got/lib/diff_output.h

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• Hash : c4cd9c5b
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  Date : 2020-11-21T15:34:19
  

  sync files from diff.git e4c510c1d83fe01247b6f59d855dffad81e4f26a

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• lib/diff_output.h

• /* Diff output generators and invocation shims. */
  /*
   * Copyright (c) 2020 Neels Hofmeyr <neels@hofmeyr.de>
   *
   * Permission to use, copy, modify, and distribute this software for any
   * purpose with or without fee is hereby granted, provided that the above
   * copyright notice and this permission notice appear in all copies.
   *
   * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   */
  
  struct diff_input_info {
  	const char *left_path;
  	const char *right_path;
  
  	/* Set by caller of diff_output_* functions. */
  	int flags;
  #define DIFF_INPUT_LEFT_NONEXISTENT	0x00000001
  #define DIFF_INPUT_RIGHT_NONEXISTENT	0x00000002
  };
  
  struct diff_output_info {
  	/*
  	 * Byte offset to each line in the generated output file.
  	 * The total number of lines in the file is line_offsets.len - 1.
  	 * The last offset in this array corresponds to end-of-file.
  	 */
  	ARRAYLIST(off_t) line_offsets;
  };
  
  void diff_output_info_free(struct diff_output_info *output_info);
  
  struct diff_chunk_context {
  	struct diff_range chunk;
  	struct diff_range left, right;
  };
  
  int diff_output_plain(struct diff_output_info **output_info, FILE *dest,
  			const struct diff_input_info *info,
  			const struct diff_result *result);
  int diff_output_unidiff(struct diff_output_info **output_info,
  			FILE *dest, const struct diff_input_info *info,
  			const struct diff_result *result,
  			unsigned int context_lines);
  int diff_output_edscript(struct diff_output_info **output_info,
  			 FILE *dest, const struct diff_input_info *info,
  			 const struct diff_result *result);
  int diff_chunk_get_left_start(const struct diff_chunk *c,
  			      const struct diff_result *r,
  			      int context_lines);
  int diff_chunk_get_left_end(const struct diff_chunk *c,
  			    const struct diff_result *r,
  			    int context_lines);
  int diff_chunk_get_right_start(const struct diff_chunk *c,
  			       const struct diff_result *r,
  			       int context_lines);
  int diff_chunk_get_right_end(const struct diff_chunk *c,
  			     const struct diff_result *r,
  			     int context_lines);
  struct diff_chunk *diff_chunk_get(const struct diff_result *r, int chunk_idx);
  int diff_chunk_get_left_count(struct diff_chunk *c);
  int diff_chunk_get_right_count(struct diff_chunk *c);
  void diff_chunk_context_get(struct diff_chunk_context *cc,
  				 const struct diff_result *r,
  				 int chunk_idx, int context_lines);
  void diff_chunk_context_load_change(struct diff_chunk_context *cc,
  				    int *nchunks_used,
  				    struct diff_result *result,
  				    int start_chunk_idx,
  				    int context_lines);
  
  struct diff_output_unidiff_state;
  struct diff_output_unidiff_state *diff_output_unidiff_state_alloc(void);
  void diff_output_unidiff_state_reset(struct diff_output_unidiff_state *state);
  void diff_output_unidiff_state_free(struct diff_output_unidiff_state *state);
  int diff_output_unidiff_chunk(struct diff_output_info **output_info, FILE *dest,
  			  struct diff_output_unidiff_state *state,
  			  const struct diff_input_info *info,
  			  const struct diff_result *result,
  			  const struct diff_chunk_context *cc);
  int diff_output_chunk_left_version(struct diff_output_info **output_info,
  			       FILE *dest,
  			       const struct diff_input_info *info,
  			       const struct diff_result *result,
  			       const struct diff_chunk_context *cc);
  int diff_output_chunk_right_version(struct diff_output_info **output_info,
  				FILE *dest,
  				const struct diff_input_info *info,
  				const struct diff_result *result,
  				const struct diff_chunk_context *cc);
  
  const char *diff_output_get_label_left(const struct diff_input_info *info);
  const char *diff_output_get_label_right(const struct diff_input_info *info);
  

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