Pass a tabsize to ucswdth()

1 files changed, 8 insertions, 4 deletions

diff --git a/lib/unicode/string/u8wdth.c b/lib/unicode/string/u8wdth.c
index 503ff7c..7a58069 100644
--- a/lib/unicode/string/u8wdth.c
+++ b/lib/unicode/string/u8wdth.c
@@ -3,15 +3,19 @@
 #include "unicode/string.h"
 
 size_t
-u8wdth(struct u8view sv)
+u8wdth(struct u8view sv, int ts)
 {
 	rune ch;
 	size_t n = 0;
 
 	while (ucsnext(&ch, &sv) != 0) {
-		int w = uprop_get_wdth(ch);
-		if (w > 0)
-			n += w;
+		if (ch == '\t')
+			n += ts - n % ts;
+		else {
+			int w = uprop_get_wdth(ch);
+			if (w > 0)
+				n += w;
+		}
 	}
 
 	return n;