Fix bug when width is less than line length

If the length of a line is longer than the width of the display we want
to center on, `width - len` becomes negative which causes an infinite
loop of printing spaces.  This fixes that bug.

1 files changed, 3 insertions, 3 deletions

diff --git a/center.c b/center.c
index 06141b8..2c4ac0f 100644
--- a/center.c
+++ b/center.c
@@ -61,7 +61,7 @@ main(int argc, char **argv)
 	char *endptr;
 	void (*centerfunc)(FILE *) = center;
 
-	while ((opt = getopt(argc, argv, ":ew:")) != -1) {
+	while ((opt = getopt(argc, argv, ":elw:")) != -1) {
 		switch (opt) {
 		case 'e':
 			lenfunc = utf8len;
@@ -127,7 +127,7 @@ center(FILE *fp)
 		}
 
 		len = lenfunc(line) + tabs * 8 - tabs;
-		for (int i = (width - len) / 2; i; i--)
+		for (int i = (width - len) / 2; i >= 0; i--)
 			putchar(' ');
 		fputs(line, stdout);
 	}
@@ -183,7 +183,7 @@ center_by_longest(FILE *fp)
 	line = STAILQ_FIRST(&list_head);
 	while (line != NULL) {
 		int len = longest;
-		for (int i = ((width - len) / 2); i; i--)
+		for (int i = ((width - len) / 2); i >= 0; i--)
 			putchar(' ');
 		fputs(line->buffer, stdout);