disallow seek past end of buffer (per posix)
fix position accounting to include data buffered for read
don't set eof flag when no data was requested
return -1;
}
base = (size_t [3]){0, c->pos, c->len}[whence];
return -1;
}
base = (size_t [3]){0, c->pos, c->len}[whence];
- if (off < -base || off > SSIZE_MAX-base) goto fail;
+ if (off < -base || off > (ssize_t)c->size-base) goto fail;
return c->pos = base+off;
}
return c->pos = base+off;
}
{
struct cookie *c = f->cookie;
size_t rem = c->size - c->pos;
{
struct cookie *c = f->cookie;
size_t rem = c->size - c->pos;
if (len > rem) len = rem;
memcpy(buf, c->buf+c->pos, len);
c->pos += len;
if (len > rem) len = rem;
memcpy(buf, c->buf+c->pos, len);
c->pos += len;
f->rpos = f->buf;
f->rend = f->buf + rem;
memcpy(f->rpos, c->buf+c->pos, rem);
f->rpos = f->buf;
f->rend = f->buf + rem;
memcpy(f->rpos, c->buf+c->pos, rem);
if (!len) f->flags |= F_EOF;
return len;
}
if (!len) f->flags |= F_EOF;
return len;
}