将CString字符串输入转化成整数

时间:2021-07-08 20:58:49
BOOL IsHexFormat(LPCTSTR pStr)
{
	if (pStr[0] == L'0' && ((pStr[1] == L'x') || (pStr[1] == L'X'))){
		return TRUE;
	}
	return FALSE;
}

BOOL IsInputValid(LPCTSTR pStr)
{
	int i;
	BOOL res;
	BOOL IsHex;
	i = 0;
	res = TRUE;
	IsHex = IsHexFormat(pStr);
	while (pStr[i] != L'\0'){
		if (pStr[i] >= L'0' && pStr[i] <= L'9'){
			i++;
			continue;
		}
		else if (IsHex && (i == 1)){
			i++;
			continue;
		}
		else if (IsHex && 
				((pStr[i] >= L'a' && pStr[i] <= L'f') || 
				 (pStr[i] >= L'A' && pStr[i] <= L'F') )) {
			i++;
			continue;
		}
		else{
			res = FALSE;
			break;
		}
	}
	return res;
}

UINT32 CStrHex2Uint32(LPCTSTR pStr)
{
	int i = 0;
	UINT32 res = 0;

	while (pStr[i] != L'\0'){
		if (pStr[i] >= L'0' && pStr[i] <= L'9'){
			res = res * 16 + pStr[i] - L'0';
		}
		else if (pStr[i] >= L'a' && pStr[i] <= L'f'){
			res = res * 16 + pStr[i] - L'a' + 10;
		}
		else if (pStr[i] >= L'A' && pStr[i] <= L'F'){
			res = res * 16 + pStr[i] - L'A' + 10;
		}
		else{
			break;
		}
		i++;
	}
	return res;
}
/* 将CString转化成UINT32, 0x开头的识别成十六进制,其它为十进制*/
BOOL CStr2Uint32(CString str, UINT32 *pData)
{
	LPCTSTR pStr;
	pStr = (LPCTSTR)str;
	if (!IsInputValid(pStr)){
		*pData = 0;
		return FALSE;
	}
	if (IsHexFormat(pStr)){
		UINT32 Data;
		pStr = &pStr[2];
		*pData = CStrHex2Uint32(pStr);
	}
	else{
		*pData = _wtoi((wchar_t *)pStr);
	}
	return TRUE;
}