GetBraOrKet now in PsimagLite

#ifndef GETBRAORKET_H

#define GETBRAORKET_H

#include "Vector.h"

#include <cstdlib>

namespace PsimagLite {

class GetBraOrKet {

public:

	GetBraOrKet(String braOrKet) : braOrKet_(braOrKet)

	{

		const SizeType l = braOrKet.length();

		if (l < 2)

			err("GetBraOrKet " + braOrKet + "\n");

		const SizeType last = l - 1;

		if (braOrKet_[0] == '|' && braOrKet_[last] == '>' && l > 2)

			braOrKet_ = braOrKet.substr(1, l - 2);

		if (braOrKet_[0] == '<' && braOrKet_[last] == '|' && l > 2)

			braOrKet_ = braOrKet.substr(1, l - 2);

	}

	SizeType operator()() const

	{

		if (braOrKet_ == "gs")

			return 0;

		int ind = getPtype(braOrKet_);

		if (ind <= 0)

			err("Malformed braket " + braOrKet_ + "\n");

		return ind;

	}

	static int getPtype(String str)

	{

		// str == P\d+

		if (str.length() < 2) return -1;

		if (str[0] != 'P') return -1;

		String number("");

		for (SizeType i = 1; i < str.length(); ++i) {

			number += str[i];

			unsigned char x = str[i];

			if (x < 48 || x > 57) return -1;

		}

		return atoi(number.c_str()) + 1;

	}

private:

	String braOrKet_;

};

}

#endif // GETBRAORKET_H