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/* Copyright 2014 Google Inc. All Rights Reserved.
Distributed under MIT license.
See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
*/
/* Output buffer for WOFF2 decompression. */
#include <woff2/output.h>
namespace woff2 {
WOFF2StringOut::WOFF2StringOut(std::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
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