RenameServer/filesystem/unix/filesystem.cpp
2021-07-09 18:28:16 +02:00

175 lines
4.6 KiB
C++

#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 = '/';
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" );
}
current_entry = readdir( d );
// skip "." and ".."
if ( current_entry != nullptr &&
( !strcmp( current_entry->d_name, "." ) ||
!strcmp( current_entry->d_name, ".." ) ) )
++( *this );
}
FSLib::Directory::Iterator::Iterator( const Directory &d_,
const struct dirent *current_entry_ )
: d( opendir( d_.path() ) ), current_entry( current_entry_ ) {}
FSLib::Directory::Iterator::~Iterator() {
if ( d )
closedir( d );
}
bool FSLib::exists( const string &path ) {
struct stat path_stat;
return stat( path.c_str(), &path_stat ) == 0;
}
string FSLib::canonical( const string &path ) {
char_t *canonical_path = new char_t[PATH_MAX];
auto failed = realpath( path.c_str(), canonical_path ) == nullptr;
if ( failed ) {
delete[] canonical_path;
return string();
}
string canonical_string{ canonical_path };
delete[] canonical_path;
return canonical_string;
}
bool FSLib::isDirectory( const string &path ) {
struct stat path_stat;
if ( stat( path.c_str(), &path_stat ) != 0 )
return false;
return S_ISDIR( path_stat.st_mode );
}
bool FSLib::rename( const string &file_a, const string &file_b ) {
// TODO log
std::cout << file_a << " -> " << file_b << std::endl;
return ::rename( file_a.c_str(), file_b.c_str() ) == 0;
}
// TODO do windows version
bool deleteRecursive(const string &dir) {
for(const auto &file : FSLib::Directory(dir)) {
auto path = dir + "/" + file;
if(FSLib::isDirectory(path)) {
if(!deleteRecursive(path)) {
return false;
}
} else if(unlink(path.c_str()) != 0) {
return false;
}
}
return rmdir(dir.c_str()) == 0;
}
bool FSLib::deleteFile( const string &file ) {
// TODO log
auto canon = canonical( file );
if(canon.empty()) {
return false;
}
if(isDirectory(canon)) {
return deleteRecursive(canon);
}
return unlink(canon.c_str()) == 0;
}
bool FSLib::createDirectoryFull( const string &path ) {
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
pos = path.find_first_of( "/", pos );
if ( pos > 0 ) {
auto dirname = path.substr( 0, pos );
// create it if it doesn't exist
if ( !FSLib::exists( dirname ) ) {
if ( mkdir( dirname.c_str(),
S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH ) != 0 )
return false;
}
}
pos++;
} while ( pos < path.length() && pos != 0 );
return true;
}
FSLib::Directory::iterator FSLib::Directory::end() {
return Iterator( *this, nullptr );
}
FSLib::Directory::const_iterator FSLib::Directory::end() const {
return Iterator( *this, nullptr );
}
char_t const *FSLib::Directory::Iterator::operator*() const {
return current_entry->d_name;
}
FSLib::Directory::Iterator &FSLib::Directory::Iterator::operator++() {
if ( current_entry == nullptr )
return *this;
current_entry = readdir( d );
// skip . and ..
if ( current_entry != nullptr &&
( !strcmp( current_entry->d_name, "." ) ||
!strcmp( current_entry->d_name, ".." ) ) )
return operator++();
return *this;
}
bool FSLib::Directory::Iterator::operator==( const Iterator &i_other ) const {
return i_other.current_entry == current_entry;
}
string FSLib::getContainingDirectory( const string &path ) {
auto pos = path.find_last_of('/');
if(pos == string::npos) {
return ".";
}
return path.substr(0, pos);
}
string FSLib::getFileName( const string &path ) {
auto pos = path.find_last_of('/');
if(pos == string::npos) {
return path;
}
return path.substr(pos+1);
}
string FSLib::getFileExtension( const string &path ) {
auto pos = path.find_last_of('.');
if(pos == string::npos) {
return "";
}
return path.substr(pos + 1);
}