// Copyright 2022 The Dawn & Tint Authors
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are met:
//
// 1. Redistributions of source code must retain the above copyright notice, this
//    list of conditions and the following disclaimer.
//
// 2. Redistributions in binary form must reproduce the above copyright notice,
//    this list of conditions and the following disclaimer in the documentation
//    and/or other materials provided with the distribution.
//
// 3. Neither the name of the copyright holder nor the names of its
//    contributors may be used to endorse or promote products derived from
//    this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
// DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
// FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
// DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
// SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
// CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#include "dawn/native/stream/ByteVectorSink.h"

#include <iomanip>

#include "dawn/native/stream/Stream.h"

namespace dawn::native::stream {

void* ByteVectorSink::GetSpace(size_t bytes) {
    size_t currentSize = this->size();
    this->resize(currentSize + bytes);
    return &this->operator[](currentSize);
}

template <>
void stream::Stream<ByteVectorSink>::Write(stream::Sink* sink, const ByteVectorSink& vec) {
    // For nested sinks, we do not record the length, and just copy the data so that it
    // appears flattened.
    size_t size = vec.size();
    if (size > 0) {
        void* ptr = sink->GetSpace(size);
        memcpy(ptr, vec.data(), size);
    }
}

std::ostream& operator<<(std::ostream& os, const ByteVectorSink& vec) {
    os << std::hex;
    for (const int b : vec) {
        os << std::setfill('0') << std::setw(2) << b << " ";
    }
    os << std::dec;
    return os;
}

}  // namespace dawn::native::stream