27       : zone_(zone), buffer_(reinterpret_cast<byte*>(zone->New(initial))) {  in zone_()
28     pos_ = buffer_;  in zone_()
29     end_ = buffer_ + initial;  in zone_()
87     byte* ptr = buffer_ + offset;  in patch_u32v()
100   size_t offset() { return static_cast<size_t>(pos_ - buffer_); }  in offset()
101   size_t size() { return static_cast<size_t>(pos_ - buffer_); }  in size()
102   const byte* begin() { return buffer_; }  in begin()
107       size_t new_size = 4096 + (end_ - buffer_) * 3;  in EnsureSpace()
109       memcpy(new_buffer, buffer_, (pos_ - buffer_));  in EnsureSpace()
110       pos_ = new_buffer + (pos_ - buffer_);  in EnsureSpace()
111       buffer_ = new_buffer;  in EnsureSpace()
120   byte* buffer_;  variable