Day: August 7, 2020

从cmdline解析出参数token

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#include <string>
#include <vector>
#include <sstream>
 
using namespace std;
 
wstring copySpanStr(const wchar_t* start, const wchar_t* end)
{
	wchar_t* buf = (wchar_t*)malloc((end - start + 1) * sizeof(wchar_t));
	wchar_t* pTo = buf;
	for (const wchar_t* p = start; p != end; p++)
	{
		if (*p == L'\\' && p + 1 != end)
		{
			p++;
			*pTo++ = *p;
		}
		else
			*pTo++ = *p;
	}
	*pTo = 0;
	wstring out = buf;
	free(buf);
	return out;
}
 
int getParams(const wchar_t* str, vector<wstring>& out)
{
	int isInQMark = 0;
	int isInSpace = 1;
	const wchar_t* tokenStart = str;
	for (const wchar_t* p = str; ; p++)
	{
		if (*p == L'"')
		{
			if (!isInQMark)
			{
				isInQMark = 1;
				tokenStart = p + 1;
			}
			else
			{
				isInQMark = 0;
				out.push_back(copySpanStr(tokenStart, p));
			}
		}
		else if (*p == L'\\')
		{
			if (*(p + 1) != 0)
				p++;
		}
		else if (*p == L' ' || *p == 0)
		{
			if (!isInQMark)
			{
				if (!isInSpace)
				{
					isInSpace = 1;
					if (tokenStart != p)
					{
						out.push_back(copySpanStr(tokenStart, p));
						tokenStart = p;
					}
				}
				else
				{
 
				}
			}
		}
		else
		{
			if (!isInQMark)
			{
				if (!isInSpace)
				{
 
				}
				else
				{
					isInSpace = 0;
					tokenStart = p;
				}
			}
		}
		if (*p == 0)
			break;
	}
	return out.size();
}
 
wstring strReplaceCh2Str(const wchar_t* in, wchar_t fromCh, const wchar_t* toStr)
{
	const wchar_t* p = in;
	wstringstream ss;
	const wchar_t* pToStr;
	for (; *p != 0; p++)
	{
		if (*p == fromCh)
		{
			for (pToStr = toStr; *pToStr != 0; pToStr++)
			{
				ss << *pToStr;
			}
		}
		else
			ss << *p;
	}
	return ss.str();
}
 
int main()
{
	wstring path = strReplaceCh2Str(L"c:\\aa.txt", L'\\', L"\\\\");
	wstring msg = strReplaceCh2Str(L"\"优孩\"是EuhatExpert的中文名。", L'\"', L"\\\"");
 
	wstring cmd = L"EuhatExample.exe subCmd \"" + path + L"\" \"" + msg + L"\" 1234 5678";
 
	vector<wstring> params;
	getParams(cmd.c_str(), params);
	return 0;
}