util.h

/*
 * Copyright 2011, Ben Langmead <langmea@cs.jhu.edu>
 *
 * This file is part of Bowtie 2.
 *
 * Bowtie 2 is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * Bowtie 2 is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with Bowtie 2.  If not, see <http://www.gnu.org/licenses/>.
 */

#ifndef UTIL_H_
#define UTIL_H_

#include <algorithm>
#include <limits>
#include <stdlib.h>
#include <vector>

#include "assert_helpers.h"

/**
 * C++ version char* style "itoa":
 */
template<typename T>
char* itoa10(const T& value, char* result) {
	// Check that base is valid
	char* out = result;
	T quotient = value;
	if(std::numeric_limits<T>::is_signed) {
		if(quotient <= 0) quotient = -quotient;
	}
	// Now write each digit from most to least significant
	do {
		*out = "0123456789"[quotient % 10];
		++out;
		quotient /= 10;
	} while (quotient > 0);
	// Only apply negative sign for base 10
	if(std::numeric_limits<T>::is_signed) {
		// Avoid compiler warning in cases where T is unsigned
		if (value < 0) *out++ = '-';
	}
	std::reverse( result, out );
	*out = 0; // terminator
	return out;
}

template <typename Container>
void erase(Container& v, size_t index) {
	assert_lt(index, v.size());
	for (size_t i = index; i < v.size()-1; i++)
		v[i] = v[i+1];
	v.pop_back();
}

#endif /*ndef UTIL_H_*/