263     int64_t offset1;  in avio_seek()  local
284         offset1 = pos + (s->buf_ptr - s->buffer);  in avio_seek()
286             return offset1;  in avio_seek()
287         if (offset > INT64_MAX - offset1)  in avio_seek()
289         offset += offset1;  in avio_seek()
300     offset1 = offset - pos; // "offset1" is the relative offset from the beginning of s->buffer  in avio_seek()
303         offset1 >= 0 && offset1 <= (s->write_flag ? s->buf_ptr_max - s->buffer : buffer_size)) {  in avio_seek()
305         s->buf_ptr = s->buffer + offset1;  in avio_seek()
307                offset1 <= buffer_size + short_seek) &&  in avio_seek()
308                !s->write_flag && offset1 >= 0 &&  in avio_seek()
316     } else if(!s->write_flag && offset1 < 0 && -offset1 < buffer_size>>1 && s->seek && offset > 0) {  in avio_seek()