stringOpsTemplates.C

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    Copyright (C) 2016-2018 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.
 
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    FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
    for more details.
 
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// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
template<class StringType>
Foam::SubStrings<StringType> Foam::stringOps::split
(
    const StringType& str,
    const char delim,
    const bool keepEmpty
)
{
    Foam::SubStrings<StringType> lst;
    if (str.empty() || !delim)
    {
        return lst;
    }
 
    lst.reserve(20);
 
    std::string::size_type beg = 0, end = 0;
    while ((end = str.find(delim, beg)) != std::string::npos)
    {
        if (keepEmpty || (beg < end))
        {
            lst.append(str.cbegin() + beg, str.cbegin() + end);
        }
        beg = end + 1;
    }
 
    // Trailing element
    if (keepEmpty ? (beg == str.size()) : (beg < str.size()))
    {
        lst.append(str.cbegin() + beg, str.cend());
    }
 
    return lst;
}
 
 
template<class StringType>
Foam::SubStrings<StringType> Foam::stringOps::split
(
    const StringType& str,
    const std::string& delim,
    const bool keepEmpty
)
{
    Foam::SubStrings<StringType> lst;
    if (str.empty() || delim.empty())
    {
        return lst;
    }
 
    lst.reserve(20);
 
    std::string::size_type beg = 0, end = 0;
    while ((end = str.find(delim, beg)) != std::string::npos)
    {
        if (keepEmpty || (beg < end))
        {
            lst.append(str.cbegin() + beg, str.cbegin() + end);
        }
        beg = end + delim.size();
    }
 
    // Trailing element
    if (keepEmpty ? (beg == str.size()) : (beg < str.size()))
    {
        lst.append(str.cbegin() + beg, str.cend());
    }
 
    return lst;
}
 
 
template<class StringType>
Foam::SubStrings<StringType> Foam::stringOps::splitAny
(
    const StringType& str,
    const std::string& delim
)
{
    Foam::SubStrings<StringType> lst;
    if (str.empty() || delim.empty())
    {
        return lst;
    }
 
    lst.reserve(20);
 
    for
    (
        std::string::size_type pos = 0;
        (pos = str.find_first_not_of(delim, pos)) != std::string::npos;
        /*nil*/
    )
    {
        const auto end = str.find_first_of(delim, pos);
 
        if (end == std::string::npos)
        {
            // Trailing element
            lst.append(str.cbegin() + pos, str.cend());
            break;
        }
 
        // Intermediate element
        lst.append(str.cbegin() + pos, str.cbegin() + end);
 
        pos = end + 1;
    }
 
    return lst;
}
 
 
template<class StringType>
Foam::SubStrings<StringType> Foam::stringOps::splitFixed
(
    const StringType& str,
    const std::string::size_type width,
    const std::string::size_type start
)
{
    Foam::SubStrings<StringType> lst;
    if (str.empty() || !width)
    {
        return lst;
    }
 
    const auto len = str.size();
    lst.reserve(1 + (len / width));
 
    for (std::string::size_type pos = start; pos < len; pos += width)
    {
        const auto end = (pos + width);
 
        if (end >= len)
        {
            // Trailing element
            lst.append(str.cbegin() + pos, str.cend());
            break;
        }
 
        lst.append(str.cbegin() + pos, str.cbegin() + end);
    }
 
    return lst;
}
 
 
template<class StringType>
Foam::SubStrings<StringType> Foam::stringOps::splitSpace
(
    const StringType& str
)
{
    return splitAny(str, "\t\n\v\f\r ");
}
 
 
// ************************************************************************* //