diff options
Diffstat (limited to 'src/stdio/fmemopen.c')
| -rw-r--r-- | src/stdio/fmemopen.c | 11 |
1 files changed, 7 insertions, 4 deletions
diff --git a/src/stdio/fmemopen.c b/src/stdio/fmemopen.c index e2adfb22..260d2889 100644 --- a/src/stdio/fmemopen.c +++ b/src/stdio/fmemopen.c @@ -23,7 +23,8 @@ 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; + size_t rem = c->len - c->pos; + if (c->pos > c->len) rem = 0; if (len > rem) { len = rem; f->flags |= F_EOF; @@ -48,13 +49,15 @@ 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; + c->buf[c->len==c->size ? c->len-1 : c->len] = 0; + } return len; } |