StringUtil.cpp

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#include <cctype>
#include "StringUtil.h"



namespace StringUtil
{


bool IsPrefix(const std::string & str, const std::string & prefix)
{
#if (__GNUC__ > 2)
    return (str.length() >= prefix.length() &&
        str.compare(0, prefix.length(), prefix) == 0);
#else
    return (str.length() >= prefix.length() &&
        str.compare(prefix, 0, prefix.length()) == 0);
#endif
}


bool IsSuffix(const std::string & str, const std::string & suffix)
{
#if (__GNUC__ > 2)
    return (str.length() >= suffix.length() &&
        str.compare(str.length() - suffix.length(), suffix.length(), suffix) == 0);
#else
    return (str.length() >= suffix.length() &&
        str.compare(suffix, str.length() - suffix.length(), suffix.length()) == 0);
#endif
}


void ToLower(std::string & str)
{
    ToLower(str.begin(), str.end());
}

void ToLower(std::string::iterator start, std::string::iterator end)
{
    std::string::iterator p = start;
    for (;p != end; ++p)
    {
        *p = tolower(*p);
    }
}

std::string ToLowerCopy (const std::string & str)
{
    std::string local(str);
    ToLower(local);
    return local;
}

void Trim(std::string & str)
{
    if (str.empty())
        return;
    
    int count = 0;
    std::string::size_type pos = 0;
    while (pos < str.length() && isspace(str[pos]))
    {
        ++count;
        ++pos;
    }
    
    if (0 < count)
        str.erase(0, count);
    
    if (str.empty())
        return;
    
    count = 0;
    pos = str.length() - 1;
    while (isspace(str[pos]))
    {
        ++count;
        if (pos == 0)
            break;
        else
            --pos;
    }

    if (0 < count)
        str.erase(str.length() - count);
}

std::string TrimCopy (const std::string & str)
{
    std::string local(str);
    Trim(local);
    return local;
}



void EncodeToXml (std::string & str)
{
    str = EncodeToXmlCopy(str);
    return;
}

std::string EncodeToXmlCopy (const std::string & str)
{
    std::string convertedString;
    
    int length = str.length();
    for(int i=0;i<length;i++)
    {
        switch(str.at(i))
        {
            case '&':
                convertedString.append("&amp;");
                break;
            case '\'':
                convertedString.append("&apos;");
                break;
            case '\"':
                convertedString.append("&quot;");
                break;
            case '<':
                convertedString.append("&lt;");
                break;
            case '>':
                convertedString.append("&gt;");
                break;
            default:
                convertedString.push_back(str.at(i));
        }
    }
    return convertedString;

}

}