game/mario/filesystem/unix/filesystem.cpp

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#include "../../filesystem.hpp"
#include <cstring>
#include <sys/stat.h>
#include <unistd.h>
#ifdef __APPLE__
#include <sys/syslimits.h>
#endif
#include <stdexcept>
#include <iostream>
char FSLib::dir_divisor = '/';
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FSLib::Directory::Directory(const string &path_) : dir_path(path_) {}
FSLib::Directory::Iterator::Iterator(const Directory &d_)
: d(opendir(d_.path())) {
if (!exists(d_.path()) || !isDirectory(d_.path())) {
throw std::runtime_error(std::string("Directory ") + d_.path() +
" either doesn't exist or isn't a directory");
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}
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current_entry = readdir(d);
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// skip "." and ".."
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if (current_entry != nullptr && (!strcmp(current_entry->d_name, ".") ||
!strcmp(current_entry->d_name, "..")))
++(*this);
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}
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FSLib::Directory::Iterator::Iterator(const Directory &d_,
const struct dirent *current_entry_)
: d(opendir(d_.path())), current_entry(current_entry_) {}
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FSLib::Directory::Iterator::~Iterator() {
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if (d)
closedir(d);
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}
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bool FSLib::exists(const string &path) {
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struct stat path_stat;
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return stat(path.c_str(), &path_stat) == 0;
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}
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string FSLib::canonical(const string &path) {
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char_t *canonical_path = new char_t[PATH_MAX];
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auto failed = realpath(path.c_str(), canonical_path) == nullptr;
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if (failed) {
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delete[] canonical_path;
return string();
}
string canonical_string{ canonical_path };
delete[] canonical_path;
return canonical_string;
}
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bool FSLib::isDirectory(const string &path) {
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struct stat path_stat;
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if (stat(path.c_str(), &path_stat) != 0)
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return false;
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return S_ISDIR(path_stat.st_mode);
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}
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bool FSLib::rename(const string &file_a, const string &file_b) {
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// TODO log
std::cout << file_a << " -> " << file_b << std::endl;
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return ::rename(file_a.c_str(), file_b.c_str()) == 0;
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}
// TODO do windows version
bool deleteRecursive(const string &dir) {
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for (const auto &file : FSLib::Directory(dir)) {
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auto path = dir + "/" + file;
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if (FSLib::isDirectory(path)) {
if (!deleteRecursive(path)) {
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return false;
}
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} else if (unlink(path.c_str()) != 0) {
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return false;
}
}
return rmdir(dir.c_str()) == 0;
}
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bool FSLib::deleteFile(const string &file) {
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// TODO log
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auto canon = canonical(file);
if (canon.empty()) {
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return false;
}
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if (isDirectory(canon)) {
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return deleteRecursive(canon);
}
return unlink(canon.c_str()) == 0;
}
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bool FSLib::createDirectoryFull(const string &path) {
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uint64_t pos{};
// go through all directories leading to the last one
// and create them if they don't exist
do {
// get partial directory path
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pos = path.find_first_of("/", pos);
if (pos > 0) {
auto dirname = path.substr(0, pos);
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// create it if it doesn't exist
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if (!FSLib::exists(dirname)) {
if (mkdir(dirname.c_str(),
S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH) != 0)
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return false;
}
}
pos++;
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} while (pos < path.length() && pos != 0);
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return true;
}
FSLib::Directory::iterator FSLib::Directory::end() {
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return Iterator(*this, nullptr);
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}
FSLib::Directory::const_iterator FSLib::Directory::end() const {
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return Iterator(*this, nullptr);
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}
char_t const *FSLib::Directory::Iterator::operator*() const {
return current_entry->d_name;
}
FSLib::Directory::Iterator &FSLib::Directory::Iterator::operator++() {
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if (current_entry == nullptr)
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return *this;
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current_entry = readdir(d);
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// skip . and ..
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if (current_entry != nullptr && (!strcmp(current_entry->d_name, ".") ||
!strcmp(current_entry->d_name, "..")))
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return operator++();
return *this;
}
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bool FSLib::Directory::Iterator::operator==(const Iterator &i_other) const {
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return i_other.current_entry == current_entry;
}
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string FSLib::getContainingDirectory(const string &path) {
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auto pos = path.find_last_of('/');
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if (pos == string::npos) {
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return ".";
}
return path.substr(0, pos);
}
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string FSLib::getFileName(const string &path) {
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auto pos = path.find_last_of('/');
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if (pos == string::npos) {
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return path;
}
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return path.substr(pos + 1);
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}
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string FSLib::getFileExtension(const string &path) {
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auto pos = path.find_last_of('.');
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if (pos == string::npos) {
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return "";
}
return path.substr(pos + 1);
}