scc

commit 524eb5c04a9a74e548c677a277743527e629d284
parent caf9a29321f8a3ef57a0ac5fb3bd42177452efc1
Author: Roberto E. Vargas Caballero <k0ga@shike2.com>
Date:   Thu,  9 Feb 2023 16:08:02 +0100

libc/printf: Allow printing 0 in numtostr()

The loop didn't ensure at least one iteration and it failed
with the case of a 0 and it didn't print anything in that
case.

Diffstat:
M
src/libc/stdio/vfprintf.c
 | 
5
++++-

1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/src/libc/stdio/vfprintf.c b/src/libc/stdio/vfprintf.c
@@ -77,8 +77,11 @@ numtostr(uintmax_t val, int flags, struct conv *conv, char *buf)
 	int base = conv->base, prec = conv->prec;
 	uintmax_t oval = val;
 
-	for (*buf = '\0'; val > 0; val /= base)
+	*buf = '\0';
+	do {
 		*--buf = conv->digs[val % base];
+		val /= base;
+	} while (val > 0);
 
 	while (buf0 - buf < prec)
 		*--buf = '0';