parsing OpenGL extension header files

wgl_grabber.cpp

struct GLFunc
{
	GLFunc(){}
	GLFunc(const GLFunc& r) {
		*this = r;
	}
	const GLFunc& operator=(const GLFunc& r) {
		name = r.name;
		decl = r.decl;
		caster = r.caster;
		return *this;
	}
	std::string name;
	std::string decl;
	std::string caster;
};
std::vector<GLFunc> glFuncs;

void ParseHeader(const char* healderFileName, const char* regExp, const char* conventions)
{
	char* h = (char*)LoadFile(healderFileName);
	std::string str = h;
	std::regex pattern(regExp);
	auto funcBegin = std::sregex_iterator(str.begin(), str.end(), pattern);
	auto End = std::sregex_iterator();
	int dist = std::distance(funcBegin, End);
	printf("%d functions found in %s\n", dist, healderFileName);
	int i = 0;
	for (auto it = funcBegin; it != End; it++) {
		std::smatch m = *it;
		if (m.size() < 4) {
			continue;
		}
		GLFunc func;
		func.name = m[2].str();
		func.decl = m[1].str() + "(" + conventions + "*" + m[2].str() + ")" + m[3].str();
		func.caster = m[1].str() + "(" + conventions + "*)" + m[3].str();
		glFuncs.push_back(func);
		printf("\r%d/%d", ++i, dist);
	}
	printf("\n");
	free(h);
}


int _tmain(int argc, _TCHAR* argv[])
{
	ParseHeader("glheaders/glcorearb.h", "^GLAPI\\s+([\\w\\s\\*]+)APIENTRY\\s+(gl\\w+)\\s*(\\(.*\\))", "APIENTRY");
	ParseHeader("glheaders/wglext.h", "^(\\w+(?:\\s+\\w+)*\\s+)WINAPI\\s+(wgl\\w+)\\s*(\\(.*\\))", "WINAPI");
	return 0;
}