X-Git-Url: http://nsz.repo.hu/git/?a=blobdiff_plain;f=src%2Fstdio%2Ffmemopen.c;h=1b054a970445e71ba5e86d363833c05fceb6faf3;hb=e15171b8d8e80e8b5bcf4e95b1709697858f545a;hp=ddb2433104071c01f47ec7f35f18fedb23c242cf;hpb=f81279ff583ef81bc88a46dd1d0140fb6e0ed222;p=musl

diff --git a/src/stdio/fmemopen.c b/src/stdio/fmemopen.c
index ddb24331..1b054a97 100644
--- a/src/stdio/fmemopen.c
+++ b/src/stdio/fmemopen.c
@@ -23,9 +23,12 @@ fail:
 static size_t mread(FILE *f, unsigned char *buf, size_t len)
 {
 	struct cookie *c = f->cookie;
-	size_t rem = c->size - c->pos;
-	if (!len) return 0;
-	if (len > rem) len = rem;
+	size_t rem = c->len - c->pos;
+	if (c->pos > c->len) rem = 0;
+	if (len > rem) {
+		len = rem;
+		f->flags |= F_EOF;
+	}
 	memcpy(buf, c->buf+c->pos, len);
 	c->pos += len;
 	rem -= len;
@@ -34,7 +37,6 @@ static size_t mread(FILE *f, unsigned char *buf, size_t len)
 	f->rend = f->buf + rem;
 	memcpy(f->rpos, c->buf+c->pos, rem);
 	c->pos += rem;
-	if (!len) f->flags |= F_EOF;
 	return len;
 }
 
@@ -47,13 +49,16 @@ static size_t mwrite(FILE *f, const unsigned char *buf, size_t len)
 		f->wpos = f->wbase;
 		if (mwrite(f, f->wpos, len2) < len2) return 0;
 	}
-	if (c->mode == 'a') c->pos = c->size;
+	if (c->mode == 'a') c->pos = c->len;
 	rem = c->size - c->pos;
 	if (len > rem) len = rem;
 	memcpy(c->buf+c->pos, buf, len);
 	c->pos += len;
-	if (c->pos >= c->len) c->len = c->pos;
-	c->buf[c->len==c->size ? c->len-1 : c->len] = 0;
+	if (c->pos > c->len) {
+		c->len = c->pos;
+		if (c->len < c->size) c->buf[c->len] = 0;
+		else if ((f->flags&F_NORD) && c->size) c->buf[c->size-1] = 0;
+	}
 	return len;
 }