84 lines
2.3 KiB
C++
84 lines
2.3 KiB
C++
#pragma once
|
|
|
|
// Distributed under the 3-Clause BSD License. See accompanying
|
|
// file LICENSE or https://github.com/CLIUtils/CLI11 for details.
|
|
|
|
#include "CLI/TypeTools.hpp"
|
|
#include <functional>
|
|
#include <iostream>
|
|
#include <string>
|
|
|
|
// C standard library
|
|
// Only needed for existence checking
|
|
// Could be swapped for filesystem in C++17
|
|
#include <sys/stat.h>
|
|
#include <sys/types.h>
|
|
|
|
namespace CLI {
|
|
|
|
/// @defgroup validator_group Validators
|
|
/// @brief Some validators that are provided
|
|
///
|
|
/// These are simple `bool(std::string)` validators that are useful.
|
|
/// @{
|
|
|
|
/// Check for an existing file
|
|
inline bool ExistingFile(std::string filename) {
|
|
struct stat buffer;
|
|
bool exist = stat(filename.c_str(), &buffer) == 0;
|
|
bool is_dir = (buffer.st_mode & S_IFDIR) != 0;
|
|
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
|
|
inline bool ExistingDirectory(std::string filename) {
|
|
struct stat buffer;
|
|
bool exist = stat(filename.c_str(), &buffer) == 0;
|
|
bool is_dir = (buffer.st_mode & S_IFDIR) != 0;
|
|
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 false;
|
|
}
|
|
}
|
|
|
|
/// Check for a non-existing path
|
|
inline 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;
|
|
}
|
|
}
|
|
|
|
/// Produce a range validator function
|
|
template <typename T> std::function<bool(std::string)> Range(T min, T max) {
|
|
return [min, max](std::string input) {
|
|
T val;
|
|
detail::lexical_cast(input, val);
|
|
return val >= min && val <= max;
|
|
};
|
|
}
|
|
|
|
/// Range of one value is 0 to value
|
|
template <typename T> std::function<bool(std::string)> Range(T max) { return Range(static_cast<T>(0), max); }
|
|
|
|
/// @}
|
|
|
|
} // namespace CLI
|