130d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun/* 230d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun * Copyright 2011 Google Inc. All Rights Reserved. 330d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun * 430d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun * Licensed under the Apache License, Version 2.0 (the "License"); 530d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun * you may not use this file except in compliance with the License. 630d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun * You may obtain a copy of the License at 730d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun * 830d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun * http://www.apache.org/licenses/LICENSE-2.0 930d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun * 1030d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun * Unless required by applicable law or agreed to in writing, software 1130d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun * distributed under the License is distributed on an "AS IS" BASIS, 1230d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 1330d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun * See the License for the specific language governing permissions and 1430d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun * limitations under the License. 1530d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun */ 1630d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 1730d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun#include "sfntly/data/font_input_stream.h" 1830d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 1930d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun#include <algorithm> 2030d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 2130d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurunnamespace sfntly { 2230d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 2330d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim GurunFontInputStream::FontInputStream(InputStream* is) 2430d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun : stream_(is), position_(0), length_(0), bounded_(false) { 2530d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun} 2630d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 2730d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim GurunFontInputStream::FontInputStream(InputStream* is, size_t length) 2830d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun : stream_(is), position_(0), length_(length), bounded_(true) { 2930d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun} 3030d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 3130d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim GurunFontInputStream::~FontInputStream() { 3230d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun // Do not close here, underlying InputStream will close themselves. 3330d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun} 3430d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 3530d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurunint32_t FontInputStream::Available() { 3630d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun if (stream_) { 3730d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun return stream_->Available(); 3830d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun } 3930d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun return 0; 4030d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun} 4130d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 4230d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurunvoid FontInputStream::Close() { 4330d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun if (stream_) { 4430d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun stream_->Close(); 4530d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun } 4630d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun} 4730d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 4830d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurunvoid FontInputStream::Mark(int32_t readlimit) { 4930d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun if (stream_) { 5030d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun stream_->Mark(readlimit); 5130d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun } 5230d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun} 5330d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 5430d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurunbool FontInputStream::MarkSupported() { 5530d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun if (stream_) { 5630d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun return stream_->MarkSupported(); 5730d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun } 5830d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun return false; 5930d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun} 6030d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 6130d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurunvoid FontInputStream::Reset() { 6230d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun if (stream_) { 6330d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun stream_->Reset(); 6430d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun } 6530d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun} 6630d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 6730d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurunint32_t FontInputStream::Read() { 6830d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun if (!stream_ || (bounded_ && position_ >= length_)) { 6930d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun return -1; 7030d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun } 7130d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun int32_t b = stream_->Read(); 7230d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun if (b >= 0) { 7330d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun position_++; 7430d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun } 7530d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun return b; 7630d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun} 7730d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 7830d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurunint32_t FontInputStream::Read(ByteVector* b, int32_t offset, int32_t length) { 7930d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun if (!stream_ || offset < 0 || length < 0 || 8030d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun (bounded_ && position_ >= length_)) { 8130d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun return -1; 8230d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun } 8330d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun int32_t bytes_to_read = 8430d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun bounded_ ? std::min<int32_t>(length, (int32_t)(length_ - position_)) : 8530d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun length; 8630d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun int32_t bytes_read = stream_->Read(b, offset, bytes_to_read); 8730d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun position_ += bytes_read; 8830d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun return bytes_read; 8930d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun} 9030d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 9130d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurunint32_t FontInputStream::Read(ByteVector* b) { 9230d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun return Read(b, 0, b->size()); 9330d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun} 9430d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 9530d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurunint32_t FontInputStream::ReadChar() { 9630d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun return Read(); 9730d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun} 9830d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 9930d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurunint32_t FontInputStream::ReadUShort() { 10030d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun return 0xffff & (Read() << 8 | Read()); 10130d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun} 10230d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 10330d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurunint32_t FontInputStream::ReadShort() { 10430d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun return ((Read() << 8 | Read()) << 16) >> 16; 10530d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun} 10630d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 10730d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurunint32_t FontInputStream::ReadUInt24() { 10830d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun return 0xffffff & (Read() << 16 | Read() << 8 | Read()); 10930d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun} 11030d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 11130d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurunint64_t FontInputStream::ReadULong() { 11230d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun return 0xffffffffL & ReadLong(); 11330d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun} 11430d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 11530d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurunint32_t FontInputStream::ReadULongAsInt() { 11630d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun int64_t ulong = ReadULong(); 11730d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun return ((int32_t)ulong) & ~0x80000000; 11830d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun} 11930d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 12030d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurunint32_t FontInputStream::ReadLong() { 12130d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun return Read() << 24 | Read() << 16 | Read() << 8 | Read(); 12230d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun} 12330d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 12430d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurunint32_t FontInputStream::ReadFixed() { 12530d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun return ReadLong(); 12630d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun} 12730d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 12830d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurunint64_t FontInputStream::ReadDateTimeAsLong() { 12930d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun return (int64_t)ReadULong() << 32 | ReadULong(); 13030d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun} 13130d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 13230d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurunint64_t FontInputStream::Skip(int64_t n) { 13330d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun if (stream_) { 13430d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun int64_t skipped = stream_->Skip(n); 13530d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun position_ += skipped; 13630d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun return skipped; 13730d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun } 13830d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun return 0; 13930d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun} 14030d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun 14130d4e1f3d81ad9f7a1aa14ce6d2ceb5df56c15cdSelim Gurun} // namespace sfntly 142