Validators.hpp
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#pragma once
// Distributed under the LGPL version 3.0 license. See accompanying
// file LICENSE or https://github.com/henryiii/CLI11 for details.
#include <string>
#include <iostream>
// C standard library
// Only needed for existence checking
// Could be swapped for filesystem in C++17
#include <sys/types.h>
#include <sys/stat.h>
namespace CLI {
/// Check for an existing file
bool ExistingFile(std::string filename) {
struct stat buffer;
bool exist = stat(filename.c_str(), &buffer) == 0;
bool is_dir = buffer.st_mode & S_IFDIR;
if(!exist) {
std::cerr << "File does not exist: " << filename << std::endl;
return false;
} else if (is_dir) {
std::cerr << "File is actually a directory: " << filename << std::endl;
return false;
} else {
return true;
}
}
/// Check for an existing directory
bool ExistingDirectory(std::string filename) {
struct stat buffer;
bool exist = stat(filename.c_str(), &buffer) == 0;
bool is_dir = buffer.st_mode & S_IFDIR;
if(!exist) {
std::cerr << "Directory does not exist: " << filename << std::endl;
return false;
} else if (is_dir) {
return true;
} else {
std::cerr << "Directory is actually a file: " << filename << std::endl;
return true;
}
}
/// Check for a non-existing path
bool NonexistentPath(std::string filename) {
struct stat buffer;
bool exist = stat(filename.c_str(), &buffer) == 0;
if(!exist) {
return true;
} else {
std::cerr << "Path exists: " << filename << std::endl;
return false;
}
}
}