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-rw-r--r--src/stdio/fmemopen.c5
1 files changed, 3 insertions, 2 deletions
diff --git a/src/stdio/fmemopen.c b/src/stdio/fmemopen.c
index 260d2889..1b054a97 100644
--- a/src/stdio/fmemopen.c
+++ b/src/stdio/fmemopen.c
@@ -54,9 +54,10 @@ static size_t mwrite(FILE *f, const unsigned char *buf, size_t len)
if (len > rem) len = rem;
memcpy(c->buf+c->pos, buf, len);
c->pos += len;
- if (c->pos >= c->len) {
+ if (c->pos > c->len) {
c->len = c->pos;
- c->buf[c->len==c->size ? c->len-1 : c->len] = 0;
+ 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;
}