117 lines
3.4 KiB
C++
117 lines
3.4 KiB
C++
/*
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* Copyright 2015 - 2019 gtalent2@gmail.com
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*/
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#include <iostream>
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#include <string_view>
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#include <vector>
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#include "imgconv.hpp"
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#include "pack.hpp"
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namespace nostalgia {
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namespace {
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[[nodiscard]] static constexpr bool endsWith(std::string_view str, std::string_view ending) {
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return str.size() >= ending.size() && str.substr(str.size() - ending.size()) == ending;
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}
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/**
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* Convert path references to inodes to save space
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* @param buff buffer holding file
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* @return error
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* stub for now
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*/
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ox::Error pathToInode(std::vector<char>*) {
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return OxError(0);
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}
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// stub for now
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ox::Error toMetalClaw(std::vector<char>*) {
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return OxError(0);
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}
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// claw file transformations are broken out because path to inode
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// transformations need to be done after the copy to the new FS is complete
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ox::Error transformClaw(ox::FileSystem32 *dest, std::string path) {
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// copy
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dest->ls(path.c_str(), [dest, path](const char *name, ox::InodeId_t) {
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auto [stat, err] = dest->stat(path.c_str());
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oxReturnError(err);
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if (stat.fileType == ox::FileType_Directory) {
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const auto dir = path + name + '/';
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oxReturnError(transformClaw(dest, dir));
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} else {
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// do transforms
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if (endsWith(path, ".claw")) {
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// load file
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std::vector<char> buff(stat.size);
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oxReturnError(dest->read(path.c_str(), buff.data(), buff.size()));
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// do transformations
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oxReturnError(pathToInode(&buff));
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oxReturnError(toMetalClaw(&buff));
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// write file to dest
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oxReturnError(dest->write(path.c_str(), buff.data(), buff.size()));
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}
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}
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return OxError(0);
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});
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return OxError(0);
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}
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[[nodiscard]] ox::Error verifyFile(ox::FileSystem32 *fs, const std::string &path, const std::vector<char> &expected) noexcept {
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std::vector<char> buff(expected.size());
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oxReturnError(fs->read(path.c_str(), buff.data(), buff.size()));
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return buff == expected ? 0 : OxError(1);
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}
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ox::Error copy(ox::PassThroughFS *src, ox::FileSystem32 *dest, std::string path) {
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std::cout << "copying directory: " << path << '\n';
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// copy
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return src->ls(path.c_str(), [src, dest, path](const char *name, ox::InodeId_t) {
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std::cout << "reading " << name << '\n';
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const auto currentFile = path + name;
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auto [stat, err] = src->stat((currentFile).c_str());
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oxReturnError(err);
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if (stat.fileType == ox::FileType_Directory) {
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oxReturnError(dest->mkdir(currentFile.c_str(), true));
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oxReturnError(copy(src, dest, currentFile + '/'));
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} else {
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std::vector<char> buff;
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// do transforms
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if (endsWith(currentFile, ".png")) {
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// load file from full path and transform
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const auto fullPath = src->basePath() + currentFile;
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buff = pngToGba(fullPath.c_str(), 0, 0);
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if (!buff.size()) {
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return OxError(1);
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}
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} else {
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// load file
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buff.resize(stat.size);
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oxReturnError(src->read(currentFile.c_str(), buff.data(), buff.size()));
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}
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// write file to dest
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std::cout << "writing " << currentFile << '\n';
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oxReturnError(dest->write(currentFile.c_str(), buff.data(), buff.size()));
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oxReturnError(verifyFile(dest, currentFile, buff));
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}
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return OxError(0);
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});
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}
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}
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ox::Error pack(ox::PassThroughFS *src, ox::FileSystem32 *dest, std::string path) {
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oxReturnError(copy(src, dest, path));
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oxReturnError(transformClaw(dest, path));
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return OxError(0);
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}
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}
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