dcxdll/XSwitchFlags.cpp at master · twig/dcxdll · GitHub

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#include "defines.h"

// Constructor
//XSwitchFlags::XSwitchFlags(const TString& switches) noexcept
//	: m_dFlagMask(0ULL)
//{
//	// no - sign, & no + sign, invalid syntax
//	if (switches[0] == TEXT('-'))
//		m_dFlagMask |= (1ULL << 60);
//	else if (switches[0] == TEXT('+'))
//		m_dFlagMask |= (1ULL << 61);
//	else
//		return;	// just return with no flags set.
//
//	const auto len = switches.len();
//
//	// Parse the switches
//	for (auto i = decltype(len){1}; i < len; ++i)
//	{
//		const auto c = switches[i];
//
//		// Check if its in the right range
//		if ((c >= TEXT('A')) && (c <= TEXT('z'))) // this gives us 57bits in use + 2 special cases
//		{
//			const auto bitn = c - TEXT('A');
//			m_dFlagMask |= (1ULL << bitn);
//		}
//	}
//}

XSwitchFlags::XSwitchFlags(const TString& switches) noexcept
	: XSwitchFlags(switches.to_chr(), switches.len())
{
}

XSwitchFlags::XSwitchFlags(const TCHAR* const switches, size_t len) noexcept
	: m_dFlagMask(0ULL)
{
	if (!switches || !len)
		return;

	// no - sign, & no + sign, invalid syntax
	if (switches[0] == TEXT('-'))
		m_dFlagMask |= (1ULL << 60);
	else if (switches[0] == TEXT('+'))
		m_dFlagMask |= (1ULL << 61);
	else
		return;	// just return with no flags set.

	// Parse the switches
	for (auto i = decltype(len){1}; i < len; ++i)
	{
		const auto c = switches[i];

		// Check if its in the right range
		if ((c >= TEXT('A')) && (c <= TEXT('z'))) // this gives us 57bits in use + 2 special cases
		{
			const auto bitn = c - TEXT('A');
			m_dFlagMask |= (1ULL << bitn);
		}
	}
}

// Checks if flags are set.
const bool XSwitchFlags::isSet(const TCHAR c) const noexcept
{
	// Lower-case & Upper-case
	if ((c >= TEXT('A')) && (c <= TEXT('z'))) // this gives us 57bits in use + 2 special cases
	{
		const auto bitn = c - TEXT('A');
		return (m_dFlagMask & (1ULL << bitn)) != 0;
	}
	else if (c == TEXT('-'))	// check if - flag identifier used.
		return (m_dFlagMask & (1ULL << 60)) != 0;
	else if (c == TEXT('+'))	// check if + flag identifier used.
		return (m_dFlagMask & (1ULL << 61)) != 0;
	return m_bFalse;
}