Function fill_es_indent_data

diff.c:930–968

#define INDENT_BLANKLINE INT_MIN

static void fill_es_indent_data(struct emitted_diff_symbol *es)
{
	unsigned int off = 0, i;
	int width = 0, tab_width = es->flags & WS_TAB_WIDTH_MASK;
	const char *s = es->line;
	const int len = es->len;

	/* skip any \v \f \r at start of indentation */
	while (s[off] == '\f' || s[off] == '\v' ||
	       (off < len - 1 && s[off] == '\r'))
		off++;

	/* calculate the visual width of indentation */
	while(1) {
		if (s[off] == ' ') {
			width++;
			off++;
		} else if (s[off] == '\t') {
			width += tab_width - (width % tab_width);
			while (s[++off] == '\t')
				width += tab_width;
		} else {
			break;
		}
	}

	/* check if this line is blank */
	for (i = off; i < len; i++)
		if (!isspace(s[i]))
		    break;

	if (i == len) {
		es->indent_width = INDENT_BLANKLINE;
		es->indent_off = len;
	} else {
		es->indent_off = off;
		es->indent_width = width;
	}
}

static int compute_ws_delta(const struct emitted_diff_symbol *a,
			    const struct emitted_diff_symbol *b)