Merge branch 'sb/diff-color-move'

A recently added "--color-moved" feature of "diff" fell into
infinite loop when ignoring whitespace changes, which has been
fixed.

* sb/diff-color-move:
  diff: fix infinite loop with --color-moved --ignore-space-change

1 files changed, 15 insertions, 13 deletions

diff --git a/diff.c b/diff.c
index 69f0357..d76bb93 100644
--- a/diff.c
+++ b/diff.c
@@ -712,20 +712,22 @@ static int next_byte(const char **cp, const char **endp,
 	if (*cp > *endp)
 		return -1;
 
-	if (DIFF_XDL_TST(diffopt, IGNORE_WHITESPACE_CHANGE)) {
-		while (*cp < *endp && isspace(**cp))
-			(*cp)++;
-		/*
-		 * After skipping a couple of whitespaces, we still have to
-		 * account for one space.
-		 */
-		return (int)' ';
-	}
+	if (isspace(**cp)) {
+		if (DIFF_XDL_TST(diffopt, IGNORE_WHITESPACE_CHANGE)) {
+			while (*cp < *endp && isspace(**cp))
+				(*cp)++;
+			/*
+			 * After skipping a couple of whitespaces,
+			 * we still have to account for one space.
+			 */
+			return (int)' ';
+		}
 
-	if (DIFF_XDL_TST(diffopt, IGNORE_WHITESPACE)) {
-		while (*cp < *endp && isspace(**cp))
-			(*cp)++;
-		/* return the first non-ws character via the usual below */
+		if (DIFF_XDL_TST(diffopt, IGNORE_WHITESPACE)) {
+			while (*cp < *endp && isspace(**cp))
+				(*cp)++;
+			/* return the first non-ws character via the usual below */
+		}
 	}
 
 	retval = (unsigned char)(**cp);