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util.h
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util.h
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/*
* 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 <stdlib.h>
#include <limits>
#include <map>
#include <string>
#include <sstream>
/**
* C++ version char* style "itoa": Convert integer to string
*/
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 && value != 0) *out++ = '-';
}
reverse( result, out );
*out = 0; // terminator
return out;
}
// extract numeric ID from the beginning of a string
inline
uint64_t extractIDFromRefName(const string& refName) {
uint64_t id = 0;
for (size_t ni = 0; ni < refName.length(); ni++) {
if (refName[ni] < '0' || refName[ni] > '9')
break;
id *= 10;
id += (refName[ni] - '0');
}
return id;
}
// Converts a numeric value to std::string (part of C++11)
template <typename T>
std::string to_string(T value) {
ostringstream ss;
ss << value;
return ss.str();
}
/**
*
*/
template<typename K,typename V>
inline
V find_or_use_default(const std::map<K, V>& my_map, const K& query, const V default_value) {
typedef typename std::map<K,V>::const_iterator MapIterator;
MapIterator itr = my_map.find(query);
if (itr == my_map.end()) {
return default_value;
}
return itr->second;
}
#endif /*ifndef UTIL_H_*/