MicroArchitecture.h added

#ifndef MICROARCHITECTURE_H

#define MICROARCHITECTURE_H

#include "AllocatorCpu.h"

#include <fstream>

namespace PsimagLite {

class MicroArchitecture {

public:

	MicroArchitecture()

	{

		vendorId_ = readLabel("/proc/cpuinfo", "vendor_id");

		if (vendorId_.find("Intel") != String::npos) {

			vendorId_ = "Intel";

		} else {

			if (vendorId_.find("AMD") != String::npos)

				vendorId_ = "AMD";

			else

				vendorId_ = extractOther(vendorId_);

		}

	}

	const String& vendorId() const { return vendorId_; }

private:

	static String readLabel(String file, String label)

	{

		std::ifstream fin(file.c_str());

		if (!fin || fin.bad() || !fin.good())

			return "";

		String line;

		bool flag = false;

		for (; std::getline(fin, line);) {

			if (line.find(label) != String::npos) {

				flag = true;

				break;

			}

		}

		fin.close();

		if (!flag) return "";

		return line;

	}

	static String extractOther(String vendorId)

	{

		std::string literal = ":";

		size_t it = vendorId.find(literal);

		if (it == String::npos) return "";

		SizeType index = it + 1;

		SizeType ind = index;

		SizeType total = vendorId.length();

		for (; ind < total; ++ind)

			if (vendorId[ind] != ' ' && vendorId[ind] != '\t') break;

		String tmp1 = vendorId.substr(ind, total - ind);

		return tmp1;

	}

	String vendorId_;

};

}

#endif // MICROARCHITECTURE_H