DRDE/AusRegEPPTK/common/StringUtils.cpp

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2013-12-31 19:36:07 +00:00
#include "common/StringUtils.hpp"
#include <cmath>
#include <sstream>
using namespace std;
string StringUtils::replaceAll (const string &theString,
const string &orig,
const string &repl)
{
string retval (theString);
int replLen = repl.length(), origLen = orig.length();
string::size_type idx = 0;
while ((idx = retval.find (orig, idx)) != string::npos)
retval.replace (idx, origLen, repl, 0, replLen);
return retval;
}
string StringUtils::replaceFirst (const string &theString,
const string &orig,
const string &repl)
{
string retval (theString);
string::size_type idx = retval.find (orig, 0);
if (idx != string::npos)
retval.replace (idx, orig.length(), repl, 0, repl.length());
return retval;
}
/*
* Create a hash code for the string.
* Uses the java string.hashCode() algorithm:
*
* s[0]*31^(n-1) + s[1]*31^(n-2) + ... + s[n-1]
*/
StringUtils::HashType StringUtils::hashCode (const string &str)
{
unsigned int n = str.length();
HashType hash = 0L;
long double term;
for (unsigned int i = 0; i < n; i++)
{
term = pow ((long double)31, (int)(n-(i+1)));
hash += str[i] * (HashType)term;
}
return hash;
}
string StringUtils::makeString (int num)
{
ostringstream intstr;
intstr << num;
return intstr.str();
}
string StringUtils::makeString (bool tf)
{
return tf ? "true" : "false";
}