Function emit_rewrite_diff

diff.c:1874–1958

}

static void emit_rewrite_diff(const char *name_a,
			      const char *name_b,
			      struct diff_filespec *one,
			      struct diff_filespec *two,
			      struct userdiff_driver *textconv_one,
			      struct userdiff_driver *textconv_two,
			      struct diff_options *o)
{
	int lc_a, lc_b;
	static struct strbuf a_name = STRBUF_INIT, b_name = STRBUF_INIT;
	const char *a_prefix, *b_prefix;
	char *data_one, *data_two;
	size_t size_one, size_two;
	unsigned ws_rule;
	struct emit_callback ecbdata;
	struct strbuf out = STRBUF_INIT;

	if (diff_mnemonic_prefix && o->flags.reverse_diff) {
		a_prefix = o->b_prefix;
		b_prefix = o->a_prefix;
	} else {
		a_prefix = o->a_prefix;
		b_prefix = o->b_prefix;
	}

	name_a += (*name_a == '/');
	name_b += (*name_b == '/');

	strbuf_reset(&a_name);
	strbuf_reset(&b_name);
	quote_two_c_style(&a_name, a_prefix, name_a, 0);
	quote_two_c_style(&b_name, b_prefix, name_b, 0);

	size_one = fill_textconv(o->repo, textconv_one, one, &data_one);
	size_two = fill_textconv(o->repo, textconv_two, two, &data_two);

	ws_rule = whitespace_rule(o->repo->index, name_b);

	/* symlink being an incomplete line is not a news */
	if (DIFF_FILE_VALID(two) && S_ISLNK(two->mode))
		ws_rule &= ~WS_INCOMPLETE_LINE;

	memset(&ecbdata, 0, sizeof(ecbdata));
	ecbdata.color_diff = o->use_color;
	ecbdata.ws_rule = ws_rule;
	ecbdata.opt = o;
	if (ecbdata.ws_rule & WS_BLANK_AT_EOF) {
		mmfile_t mf1, mf2;
		mf1.ptr = (char *)data_one;
		mf2.ptr = (char *)data_two;
		mf1.size = size_one;
		mf2.size = size_two;
		check_blank_at_eof(&mf1, &mf2, &ecbdata);
	}
	ecbdata.lno_in_preimage = 1;
	ecbdata.lno_in_postimage = 1;

	lc_a = count_lines(data_one, size_one);