Function parse_git_diff_header

apply.c:1342–1459

}

int parse_git_diff_header(struct strbuf *root,
			  const char *patch_input_file,
			  int *linenr,
			  int p_value,
			  const char *line,
			  int len,
			  unsigned int size,
			  struct patch *patch)
{
	unsigned long offset;
	struct gitdiff_data parse_hdr_state;

	/* A git diff has explicit new/delete information, so we don't guess */
	patch->is_new = 0;
	patch->is_delete = 0;

	/*
	 * Some things may not have the old name in the
	 * rest of the headers anywhere (pure mode changes,
	 * or removing or adding empty files), so we get
	 * the default name from the header.
	 */
	patch->def_name = git_header_name(p_value, line, len);
	if (patch->def_name && root->len) {
		char *s = xstrfmt("%s%s", root->buf, patch->def_name);
		free(patch->def_name);
		patch->def_name = s;
	}

	line += len;
	size -= len;
	(*linenr)++;
	parse_hdr_state.root = root;
	parse_hdr_state.patch_input_file = patch_input_file;
	parse_hdr_state.linenr = *linenr;
	parse_hdr_state.p_value = p_value;

	for (offset = len ; size > 0 ; offset += len, size -= len, line += len, (*linenr)++) {
		static const struct opentry {
			const char *str;
			int (*fn)(struct gitdiff_data *, const char *, struct patch *);
		} optable[] = {
			{ "@@ -", gitdiff_hdrend },
			{ "--- ", gitdiff_oldname },
			{ "+++ ", gitdiff_newname },
			{ "old mode ", gitdiff_oldmode },
			{ "new mode ", gitdiff_newmode },
			{ "deleted file mode ", gitdiff_delete },
			{ "new file mode ", gitdiff_newfile },
			{ "copy from ", gitdiff_copysrc },
			{ "copy to ", gitdiff_copydst },
			{ "rename old ", gitdiff_renamesrc },
			{ "rename new ", gitdiff_renamedst },
			{ "rename from ", gitdiff_renamesrc },
			{ "rename to ", gitdiff_renamedst },
			{ "similarity index ", gitdiff_similarity },
			{ "dissimilarity index ", gitdiff_dissimilarity },
			{ "index ", gitdiff_index },