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src/subversion/subversion/libsvn_diff/parse-diff.c  view on Meta::CPAN

                                  scratch_pool));

  /* Canonicalize the path name. */
  canon_path = svn_dirent_canonicalize(utf8_path, scratch_pool);

  *file_name = apr_pstrdup(result_pool, canon_path);

  return SVN_NO_ERROR;
}

/* Parse the '--- ' line of a regular unidiff. */
static svn_error_t *
diff_minus(enum parse_state *new_state, char *line, svn_patch_t *patch,
           apr_pool_t *result_pool, apr_pool_t *scratch_pool)
{
  /* If we can find a tab, it separates the filename from
   * the rest of the line which we can discard. */
  char *tab = strchr(line, '\t');
  if (tab)
    *tab = '\0';

  SVN_ERR(grab_filename(&patch->old_filename, line + STRLEN_LITERAL("--- "),
                        result_pool, scratch_pool));

  *new_state = state_minus_seen;

  return SVN_NO_ERROR;
}

/* Parse the '+++ ' line of a regular unidiff. */
static svn_error_t *
diff_plus(enum parse_state *new_state, char *line, svn_patch_t *patch,
           apr_pool_t *result_pool, apr_pool_t *scratch_pool)
{
  /* If we can find a tab, it separates the filename from
   * the rest of the line which we can discard. */
  char *tab = strchr(line, '\t');
  if (tab)
    *tab = '\0';

  SVN_ERR(grab_filename(&patch->new_filename, line + STRLEN_LITERAL("+++ "),
                        result_pool, scratch_pool));

  *new_state = state_unidiff_found;

  return SVN_NO_ERROR;
}

/* Parse the first line of a git extended unidiff. */
static svn_error_t *
git_start(enum parse_state *new_state, char *line, svn_patch_t *patch,
          apr_pool_t *result_pool, apr_pool_t *scratch_pool)
{
  const char *old_path_start;
  char *old_path_end;
  const char *new_path_start;
  const char *new_path_end;
  char *new_path_marker;
  const char *old_path_marker;

  /* ### Add handling of escaped paths
   * http://www.kernel.org/pub/software/scm/git/docs/git-diff.html:
   *
   * TAB, LF, double quote and backslash characters in pathnames are
   * represented as \t, \n, \" and \\, respectively. If there is need for
   * such substitution then the whole pathname is put in double quotes.
   */

  /* Our line should look like this: 'diff --git a/path b/path'.
   *
   * If we find any deviations from that format, we return with state reset
   * to start.
   */
  old_path_marker = strstr(line, " a/");

  if (! old_path_marker)
    {
      *new_state = state_start;
      return SVN_NO_ERROR;
    }

  if (! *(old_path_marker + 3))
    {
      *new_state = state_start;
      return SVN_NO_ERROR;
    }

  new_path_marker = strstr(old_path_marker, " b/");

  if (! new_path_marker)
    {
      *new_state = state_start;
      return SVN_NO_ERROR;
    }

  if (! *(new_path_marker + 3))
    {
      *new_state = state_start;
      return SVN_NO_ERROR;
    }

  /* By now, we know that we have a line on the form '--git diff a/.+ b/.+'
   * We only need the filenames when we have deleted or added empty
   * files. In those cases the old_path and new_path is identical on the
   * 'diff --git' line.  For all other cases we fetch the filenames from
   * other header lines. */
  old_path_start = line + STRLEN_LITERAL("diff --git a/");
  new_path_end = line + strlen(line);
  new_path_start = old_path_start;

  while (TRUE)
    {
      ptrdiff_t len_old;
      ptrdiff_t len_new;

      new_path_marker = strstr(new_path_start, " b/");

      /* No new path marker, bail out. */
      if (! new_path_marker)
        break;