Common C++ classes and routines used by my applications such as argument parser, IO and conversion utilities
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#include "./misc.h"
#include "./nativefilestream.h"
#include <streambuf>
using namespace std;
namespace CppUtilities {
/*!
* \brief Reads all contents of the specified file in a single call.
* \throws Throws std::ios_base::failure when an error occurs or the specified \a maxSize
* would be exceeded.
* \todo Use std::string_view to pass \a path in v6.
*/
std::string readFile(const std::string &path, std::string::size_type maxSize)
{
NativeFileStream file;
file.exceptions(ios_base::failbit | ios_base::badbit);
file.open(path, ios_base::in | ios_base::binary);
file.seekg(0, ios_base::end);
string res;
const auto size = static_cast<string::size_type>(file.tellg());
if (maxSize != string::npos && size > maxSize) {
throw ios_base::failure("File exceeds max size");
}
res.reserve(size);
file.seekg(ios_base::beg);
res.assign((istreambuf_iterator<char>(file)), istreambuf_iterator<char>());
return res;
}
/*!
* \brief Writes all \a contents to the specified file in a single call.
* \throws Throws std::ios_base::failure when an error occurs.
* \remarks Closing the file manually to prevent flushing the file within the d'tor which
* would suppress an exception
*/
void writeFile(std::string_view path, std::string_view contents)
{
NativeFileStream file;
file.exceptions(ios_base::failbit | ios_base::badbit);
file.open(path.data(), ios_base::out | ios_base::trunc | ios_base::binary);
file.write(contents.data(), static_cast<std::streamoff>(contents.size()));
file.close();
}
} // namespace CppUtilities