thodg/libgit2/src/blame.h

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• Hash : 944dbd12
  Author :
  Date : 2015-11-24T10:52:17
  

  blame: use size_t for line counts in git_blame__entry The `git_blame__entry` struct keeps track of line counts with `int` fields. Since `int` is only guaranteed to be at least 16 bits we may overflow on certain platforms when line counts exceed 2^15. Fix this by instead storing line counts in `size_t`.

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• src/blame.h

• #ifndef INCLUDE_blame_h__
  #define INCLUDE_blame_h__
  
  #include "git2/blame.h"
  #include "common.h"
  #include "vector.h"
  #include "diff.h"
  #include "array.h"
  #include "git2/oid.h"
  
  /*
   * One blob in a commit that is being suspected
   */
  typedef struct git_blame__origin {
  	int refcnt;
  	struct git_blame__origin *previous;
  	git_commit *commit;
  	git_blob *blob;
  	char path[GIT_FLEX_ARRAY];
  } git_blame__origin;
  
  /*
   * Each group of lines is described by a git_blame__entry; it can be split
   * as we pass blame to the parents.  They form a linked list in the
   * scoreboard structure, sorted by the target line number.
   */
  typedef struct git_blame__entry {
  	struct git_blame__entry *prev;
  	struct git_blame__entry *next;
  
  	/* the first line of this group in the final image;
  	 * internally all line numbers are 0 based.
  	 */
  	size_t lno;
  
  	/* how many lines this group has */
  	size_t num_lines;
  
  	/* the commit that introduced this group into the final image */
  	git_blame__origin *suspect;
  
  	/* true if the suspect is truly guilty; false while we have not
  	 * checked if the group came from one of its parents.
  	 */
  	bool guilty;
  
  	/* true if the entry has been scanned for copies in the current parent
  	 */
  	bool scanned;
  
  	/* the line number of the first line of this group in the
  	 * suspect's file; internally all line numbers are 0 based.
  	 */
  	size_t s_lno;
  
  	/* how significant this entry is -- cached to avoid
  	 * scanning the lines over and over.
  	 */
  	unsigned score;
  
  	/* Whether this entry has been tracked to a boundary commit.
  	 */
  	bool is_boundary;
  } git_blame__entry;
  
  struct git_blame {
  	char *path;
  	git_repository *repository;
  	git_blame_options options;
  
  	git_vector hunks;
  	git_vector paths;
  
  	git_blob *final_blob;
  	git_array_t(size_t) line_index;
  
  	size_t current_diff_line;
  	git_blame_hunk *current_hunk;
  
  	/* Scoreboard fields */
  	git_commit *final;
  	git_blame__entry *ent;
  	int num_lines;
  	const char *final_buf;
  	git_off_t final_buf_size;
  };
  
  git_blame *git_blame__alloc(
  	git_repository *repo,
  	git_blame_options opts,
  	const char *path);
  
  #endif
  

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