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Date: Sat, 18 Nov 2017 17:51:48 +0100
From: Szabolcs Nagy <nsz@...t70.net>
To: musl@...ts.openwall.com
Subject: [PATCH] fix fgetwc when decoding a character that crosses buffer
boundary
Update the buffer position according to the bytes consumed into st when
decoding an incomplete character at the end of the buffer.
---
src/stdio/fgetwc.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/src/stdio/fgetwc.c b/src/stdio/fgetwc.c
index e455cfec..a00c1a86 100644
--- a/src/stdio/fgetwc.c
+++ b/src/stdio/fgetwc.c
@@ -15,20 +15,21 @@ static wint_t __fgetwc_unlocked_internal(FILE *f)
if (f->rpos < f->rend) {
l = mbrtowc(&wc, (void *)f->rpos, f->rend - f->rpos, &st);
if (l+2 >= 2) {
f->rpos += l + !l; /* l==0 means 1 byte, null */
return wc;
}
if (l == -1) {
f->rpos++;
return WEOF;
}
+ f->rpos = f->rend;
} else l = -2;
/* Convert character byte-by-byte */
while (l == -2) {
b = c = getc_unlocked(f);
if (c < 0) {
if (!mbsinit(&st)) errno = EILSEQ;
return WEOF;
}
l = mbrtowc(&wc, (void *)&b, 1, &st);
--
2.15.0
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