1.1 --- a/jitcraft/CompactBuffer.h Tue Jul 24 23:53:34 2012 -0700
1.2 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000
1.3 @@ -1,100 +0,0 @@
1.4 -/* vim: set ts=4 sw=4 tw=99 et:
1.5 - *
1.6 - * Copyright (C) 2012 David Anderson
1.7 - *
1.8 - * This file is part of JITCraft.
1.9 - *
1.10 - * JITCraft is free software: you can redistribute it and/or modify it under
1.11 - * the terms of the GNU General Public License as published by the Free
1.12 - * Software Foundation, either version 3 of the License, or (at your option)
1.13 - * any later version.
1.14 - *
1.15 - * Foobar is distributed in the hope that it will be useful, but WITHOUT ANY
1.16 - * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
1.17 - * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
1.18 - *
1.19 - * You should have received a copy of the GNU General Public License along with
1.20 - * JITCraft. If not, see http://www.gnu.org/licenses/.
1.21 - */
1.22 -#ifndef _include_jc_compact_buffer_h_
1.23 -#define _include_jc_compact_buffer_h_
1.24 -
1.25 -#include "AllocatorPolicies.h"
1.26 -#include "Utility.h"
1.27 -#include "Vector.h"
1.28 -
1.29 -namespace ke {
1.30 -
1.31 -class CompactBufferReader
1.32 -{
1.33 - const uint8 *pos_;
1.34 - const uint8 *end_;
1.35 -
1.36 - public:
1.37 - CompactBufferReader(const uint8 *start, const uint8 *end)
1.38 - : pos_(start),
1.39 - end_(end)
1.40 - {
1.41 - }
1.42 -
1.43 - uint8 readUint8() {
1.44 - assert(pos_ < end_);
1.45 - return *pos_++;
1.46 - }
1.47 -
1.48 - uint32 readUint32() {
1.49 - uint32 value = 0;
1.50 - uint32 shift = 0;
1.51 -
1.52 - uint8 byte;
1.53 - do {
1.54 - byte = readUint8();
1.55 - value |= (byte >> 1) << shift;
1.56 - shift += 7;
1.57 - } while (byte & 1);
1.58 -
1.59 - assert(shift < 32);
1.60 - return value;
1.61 - }
1.62 -
1.63 - bool done() const {
1.64 - return pos_ == end_;
1.65 - }
1.66 -};
1.67 -
1.68 -class CompactBufferWriter
1.69 -{
1.70 - Vector<uint8, ZoneAllocatorPolicy> buffer_;
1.71 - bool enoughMemory_;
1.72 -
1.73 - public:
1.74 - CompactBufferWriter()
1.75 - : enoughMemory_(true)
1.76 - {
1.77 - }
1.78 -
1.79 - void writeUint8(unsigned value) {
1.80 - enoughMemory_ &= buffer_.append(value);
1.81 - }
1.82 - void writeUint32(unsigned value) {
1.83 - do {
1.84 - writeUint8(((value & 0x7F) << 1) | (value > 0x7F));
1.85 - value >>= 7;
1.86 - } while (value);
1.87 - }
1.88 -
1.89 - uint8 *buffer() const {
1.90 - return buffer_.buffer();
1.91 - }
1.92 - size_t length() const {
1.93 - return buffer_.length();
1.94 - }
1.95 -
1.96 - bool oom() const {
1.97 - return !enoughMemory_;
1.98 - }
1.99 -};
1.100 -
1.101 -}
1.102 -
1.103 -#endif // _include_jc_compact_buffer_h_