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https://github.com/eried/portapack-mayhem.git
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34fefd1cad
* Add file reader * Add a simple test example of parsing settings. * Use new FileLineReader to parse Glass presets * Trim CRLF from Glass preset name
90 lines
2.4 KiB
C++
90 lines
2.4 KiB
C++
/*
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* Copyright (C) 2023 Kyle Reed
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*
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* This file is part of PortaPack.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 51 Franklin Street,
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* Boston, MA 02110-1301, USA.
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*/
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#pragma once
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#include "file.hpp"
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#include <cstring>
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#include <cstdio>
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#include <string>
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/* Mocks the File interface with a backing string. */
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class MockFile {
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public:
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using Error = File::Error;
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using Offset = File::Offset;
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using Size = File::Size;
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template <typename T>
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using Result = File::Result<T>;
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MockFile(std::string data)
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: data_{std::move(data)} {}
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Size size() { return data_.size(); }
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Result<Offset> seek(uint32_t offset) {
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if ((int32_t)offset < 0)
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return {static_cast<Error>(FR_BAD_SEEK)};
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auto previous = offset_;
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if (offset > size())
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data_.resize(offset);
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offset_ = offset;
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return previous;
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}
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Result<Offset> truncate() {
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data_.resize(offset_);
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return offset_;
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}
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Result<Size> read(void* data, Size bytes_to_read) {
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if (offset_ + bytes_to_read > size())
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bytes_to_read = size() - offset_;
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if (bytes_to_read == 0 || bytes_to_read > size()) // NB: underflow wrap
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return 0;
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memcpy(data, &data_[offset_], bytes_to_read);
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offset_ += bytes_to_read;
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return bytes_to_read;
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}
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Result<Size> write(const void* data, Size bytes_to_write) {
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auto new_offset = offset_ + bytes_to_write;
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if (new_offset >= size())
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data_.resize(new_offset);
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memcpy(&data_[offset_], data, bytes_to_write);
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offset_ = new_offset;
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return bytes_to_write;
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}
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Optional<Error> sync() {
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return {};
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}
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std::string data_;
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uint32_t offset_{0};
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};
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