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// Copyright 2024 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.
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// 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.
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// 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.
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#ifndef SRC_TINT_UTILS_BYTES_BUFFER_WRITER_H_
#define SRC_TINT_UTILS_BYTES_BUFFER_WRITER_H_
#include <stdint.h>
#include "src/tint/utils/bytes/writer.h"
namespace tint::bytes {
/// BufferWriter is an implementation of the Writer interface backed by a buffer.
template <size_t N>
class BufferWriter final : public Writer {
public:
/// @copydoc Writer::Write
Result<SuccessType> Write(const std::byte* in, size_t count) override {
size_t at = buffer.Length();
buffer.Resize(at + count);
memcpy(&buffer[at], in, count);
return Success;
}
/// @returns the buffer content as a string view
std::string_view BufferString() const {
if (buffer.IsEmpty()) {
return "";
}
auto* data = reinterpret_cast<const char*>(&buffer[0]);
static_assert(sizeof(std::byte) == sizeof(char), "length needs calculation");
return std::string_view(data, buffer.Length());
}
/// The buffer holding the written data
Vector<std::byte, N> buffer;
};
/// Deduction guide for BufferWriter
BufferWriter() -> BufferWriter<32>;
} // namespace tint::bytes
#endif // SRC_TINT_UTILS_BYTES_BUFFER_WRITER_H_