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String.cpp

//
// String.h
//
// $Id: //poco/1.2/Foundation/src/String.cpp#2 $
//
// Library: Foundation
// Package: Core
// Module:  String
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// Permission is hereby granted, free of charge, to any person or organization
// obtaining a copy of the software and accompanying documentation covered by
// this license (the "Software") to use, reproduce, display, distribute,
// execute, and transmit the Software, and to prepare derivative works of the
// Software, and to permit third-parties to whom the Software is furnished to
// do so, all subject to the following:
// 
// The copyright notices in the Software and this entire statement, including
// the above license grant, this restriction and the following disclaimer,
// must be included in all copies of the Software, in whole or in part, and
// all derivative works of the Software, unless such copies or derivative
// works are solely in the form of machine-executable object code generated by
// a source language processor.
// 
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE, TITLE AND NON-INFRINGEMENT. IN NO EVENT
// SHALL THE COPYRIGHT HOLDERS OR ANYONE DISTRIBUTING THE SOFTWARE BE LIABLE
// FOR ANY DAMAGES OR OTHER LIABILITY, WHETHER IN CONTRACT, TORT OR OTHERWISE,
// ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
// DEALINGS IN THE SOFTWARE.
//


#include "Poco/String.h"


namespace Poco {


#if defined(POCO_NO_TEMPLATE_ICOMPARE)


int icompare(const std::string& str, std::string::size_type pos, std::string::size_type n, std::string::const_iterator it2, std::string::const_iterator end2)
{
      std::string::size_type sz = str.size();
      if (pos > sz) pos = sz;
      if (pos + n > sz) n = sz - pos;
      std::string::const_iterator it1  = str.begin() + pos; 
      std::string::const_iterator end1 = str.begin() + pos + n;
      std::locale loc;
      while (it1 != end1 && it2 != end2)
      {
        std::string::value_type c1 = tolower(*it1, loc);
        std::string::value_type c2 = tolower(*it2, loc);
        if (c1 < c2)
            return -1;
        else if (c1 > c2)
            return 1;
        ++it1; ++it2;
      }
    
    if (it1 == end1)
            return it2 == end2 ? 0 : -1;
    else
        return 1;
}


int icompare(const std::string& str1, const std::string& str2)
{
      return icompare(str1, 0, str1.size(), str2.begin(), str2.end());
}


int icompare(const std::string& str1, std::string::size_type n1, const std::string& str2, std::string::size_type n2)
{
      if (n2 > str2.size()) n2 = str2.size();
      return icompare(str1, 0, n1, str2.begin(), str2.begin() + n2);
}


int icompare(const std::string& str1, std::string::size_type n, const std::string& str2)
{
      if (n > str2.size()) n = str2.size();
      return icompare(str1, 0, n, str2.begin(), str2.begin() + n);
}


int icompare(const std::string& str1, std::string::size_type pos, std::string::size_type n, const std::string& str2)
{
      return icompare(str1, pos, n, str2.begin(), str2.end());
}


int icompare(const std::string& str1, std::string::size_type pos1, std::string::size_type n1, const std::string& str2, std::string::size_type pos2, std::string::size_type n2)
{
      std::string::size_type sz2 = str2.size();
      if (pos2 > sz2) pos2 = sz2;
      if (pos2 + n2 > sz2) n2 = sz2 - pos2;
      return icompare(str1, pos1, n1, str2.begin() + pos2, str2.begin() + pos2 + n2);
}


int icompare(const std::string& str1, std::string::size_type pos1, std::string::size_type n, const std::string& str2, std::string::size_type pos2)
{
      std::string::size_type sz2 = str2.size();
      if (pos2 > sz2) pos2 = sz2;
      if (pos2 + n > sz2) n = sz2 - pos2;
      return icompare(str1, pos1, n, str2.begin() + pos2, str2.begin() + pos2 + n);
}


int icompare(const std::string& str, std::string::size_type pos, std::string::size_type n, const std::string::value_type* ptr)
{
      poco_check_ptr (ptr);
      std::string::size_type sz = str.size();
      if (pos > sz) pos = sz;
      if (pos + n > sz) n = sz - pos;
      std::string::const_iterator it  = str.begin() + pos; 
      std::string::const_iterator end = str.begin() + pos + n;
      std::locale loc;
      while (it != end && *ptr)
      {
        std::string::value_type c1 = tolower(*it, loc);
        std::string::value_type c2 = tolower(*ptr, loc);
        if (c1 < c2)
            return -1;
        else if (c1 > c2)
            return 1;
        ++it; ++ptr;
      }
    
    if (it == end)
            return *ptr == 0 ? 0 : -1;
    else
        return 1;
}


int icompare(const std::string& str, std::string::size_type pos, const std::string::value_type* ptr)
{
      return icompare(str, pos, str.size() - pos, ptr);
}


int icompare(const std::string& str, const std::string::value_type* ptr)
{
      return icompare(str, 0, str.size(), ptr);
}


std::string replace(const std::string& str, const std::string& from, const std::string& to, std::string::size_type start)
{
      std::string result(str);
      replaceInPlace(result, from, to, start);
      return result;
}


std::string replace(const std::string& str, const std::string::value_type* from, const std::string::value_type* to, std::string::size_type start)
{
      std::string result(str);
      replaceInPlace(result, from, to, start);
      return result;
}

      
std::string& replaceInPlace(std::string& str, const std::string& from, const std::string& to, std::string::size_type start)
{
      poco_assert (from.size() > 0);
      
      std::string result;
      std::string::size_type pos = 0;
      result.append(str, 0, start);
      do
      {
            pos = str.find(from, start);
            if (pos != std::string::npos)
            {
                  result.append(str, start, pos - start);
                  result.append(to);
                  start = pos + from.length();
            }
            else result.append(str, start, str.size() - start);
      }
      while (pos != std::string::npos);
      str.swap(result);
      return str;
}


std::string& replaceInPlace(std::string& str, const std::string::value_type* from, const std::string::value_type* to, std::string::size_type start)
{
      poco_assert (*from);

      std::string result;
      std::string::size_type pos = 0;
      std::string::size_type fromLen = strlen(from);
      result.append(str, 0, start);
      do
      {
            pos = str.find(from, start);
            if (pos != std::string::npos)
            {
                  result.append(str, start, pos - start);
                  result.append(to);
                  start = pos + fromLen;
            }
            else result.append(str, start, str.size() - start);
      }
      while (pos != std::string::npos);
      str.swap(result);
      return str;
}


#endif


} // namespace Poco

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