X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;ds=sidebyside;f=src%2Fstdio%2Fftell.c;h=1a2afbbce3a62ef87f90c7093d11bd8f5369da84;hb=54316a52b2119edf73e274c8b4f25d7757f7b4d3;hp=5ca416549dd901cb8ced1160c276136066b09987;hpb=63a4c9adf227a6f6a5f7f70f6dc3f8863f846927;p=musl

diff --git a/src/stdio/ftell.c b/src/stdio/ftell.c
index 5ca41654..1a2afbbc 100644
--- a/src/stdio/ftell.c
+++ b/src/stdio/ftell.c
@@ -5,12 +5,16 @@
 off_t __ftello_unlocked(FILE *f)
 {
 	off_t pos = f->seek(f, 0,
-		(f->flags & F_APP) && f->wpos > f->wbase
+		(f->flags & F_APP) && f->wpos != f->wbase
 		? SEEK_END : SEEK_CUR);
 	if (pos < 0) return pos;
 
 	/* Adjust for data in buffer. */
-	return pos - (f->rend - f->rpos) + (f->wpos - f->wbase);
+	if (f->rend)
+		pos += f->rpos - f->rend;
+	else if (f->wbase)
+		pos += f->wpos - f->wbase;
+	return pos;
 }
 
 off_t __ftello(FILE *f)