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Adding error messages on failed conversion

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This commit is contained in:
Henry Fredrick Schreiner 2017-02-09 13:43:32 -05:00
parent cf667f28a9
commit 960cc104db
1 changed files with 31 additions and 8 deletions
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39
include/CLI/Validators.hpp
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@ -4,6 +4,7 @@
// file LICENSE or https://github.com/henryiii/CLI11 for details.
#include <string>
#include <iostream>
// C standard library
@ -17,25 +18,47 @@ namespace CLI {
/// Check for an existing file
bool ExistingFile(std::string filename) {
// std::fstream f(name.c_str());
// return f.good();
// Fastest way according to http://stackoverflow.com/questions/12774207/fastest-way-to-check-if-a-file-exist-using-standard-c-c11-c
struct stat buffer;
return (stat(filename.c_str(), &buffer) == 0);
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;
if(stat(filename.c_str(), &buffer) == 0 && (buffer.st_mode & S_IFDIR) )
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;
return false;
} 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;
return stat(filename.c_str(), &buffer) != 0;
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;
}
}