| // Copyright 2014 Google Inc. All Rights Reserved. |
| // |
| // Licensed under the Apache License, Version 2.0 (the "License"); |
| // you may not use this file except in compliance with the License. |
| // You may obtain a copy of the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an "AS IS" BASIS, |
| // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| // See the License for the specific language governing permissions and |
| // limitations under the License. |
| // |
| // Output buffer for WOFF2 decompression. |
| |
| #include "./woff2_out.h" |
| |
| namespace woff2 { |
| |
| WOFF2StringOut::WOFF2StringOut(string* buf) |
| : buf_(buf), |
| max_size_(kDefaultMaxSize), |
| offset_(0) {} |
| |
| bool WOFF2StringOut::Write(const void *buf, size_t n) { |
| return Write(buf, offset_, n); |
| } |
| |
| bool WOFF2StringOut::Write(const void *buf, size_t offset, size_t n) { |
| if (offset > max_size_ || n > max_size_ - offset) { |
| return false; |
| } |
| if (offset == buf_->size()) { |
| buf_->append(static_cast<const char*>(buf), n); |
| } else { |
| if (offset + n > buf_->size()) { |
| buf_->append(offset + n - buf_->size(), 0); |
| } |
| buf_->replace(offset, n, static_cast<const char*>(buf), n); |
| } |
| offset_ = std::max(offset_, offset + n); |
| |
| return true; |
| } |
| |
| void WOFF2StringOut::SetMaxSize(size_t max_size) { |
| max_size_ = max_size; |
| if (offset_ > max_size_) { |
| offset_ = max_size_; |
| } |
| } |
| |
| WOFF2MemoryOut::WOFF2MemoryOut(uint8_t* buf, size_t buf_size) |
| : buf_(buf), |
| buf_size_(buf_size), |
| offset_(0) {} |
| |
| bool WOFF2MemoryOut::Write(const void *buf, size_t n) { |
| return Write(buf, offset_, n); |
| } |
| |
| bool WOFF2MemoryOut::Write(const void *buf, size_t offset, size_t n) { |
| if (offset > buf_size_ || n > buf_size_ - offset) { |
| return false; |
| } |
| std::memcpy(buf_ + offset, buf, n); |
| offset_ = std::max(offset_, offset + n); |
| |
| return true; |
| } |
| |
| } // namespace woff2 |