From 54490a29006529f7ceb4dc0514a075f9f4175621 Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@tavianator.com>
Date: Wed, 20 Mar 2024 16:56:46 -0400
Subject: bfstd: Check that wcwidth() is positive

wcwidth() returns -1 for non-printable characters, but terminals
typically don't print anything for them, so treat them as 0.
---
 src/bfstd.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

(limited to 'src')

diff --git a/src/bfstd.c b/src/bfstd.c
index c6c2e7f..5b64452 100644
--- a/src/bfstd.c
+++ b/src/bfstd.c
@@ -695,8 +695,12 @@ size_t xstrwidth(const char *str) {
 		if (wc == WEOF) {
 			// Assume a single-width '?'
 			++ret;
-		} else {
-			ret += xwcwidth(wc);
+			continue;
+		}
+
+		int width = xwcwidth(wc);
+		if (width > 0) {
+			ret += width;
 		}
 	}
 
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