loom

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/*
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MIT License
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Copyright (c) 2021 МГТУ им. Н.Э. Баумана, кафедра ИУ-6, Михаил Фетисов,
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https://bmstu.codes/lsx/simodo
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*/
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#include "simodo/inout/convert/functions.h"
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namespace simodo::inout
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{
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void replaceAll(std::u16string &str, const std::u16string &from, const std::u16string &to)
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{
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    if(from.empty())
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        return;
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    size_t start_pos = 0;
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    while((start_pos = str.find(from, start_pos)) != std::string::npos)
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    {
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        str.replace(start_pos, from.length(), to);
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        start_pos += to.length(); // In case 'to' contains 'from', like replacing 'x' with 'yx'
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    }
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}
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std::u16string replace(const std::u16string &str, const std::u16string &from, const std::u16string &to)
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{
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    if(from.empty())
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        return str;
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    std::u16string res;
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    res.reserve(str.size() * 2);
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    size_t start_pos = 0;
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    size_t pos = 0;
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    while((pos = str.find(from, start_pos)) != std::string::npos)
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    {
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        size_t target_pos = res.size();
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        res.resize(res.size()+pos-start_pos+to.size());
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        str.copy(res.data()+target_pos,pos-start_pos,start_pos);
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        to.copy(res.data()+target_pos+pos-start_pos,to.size());
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        start_pos = pos + from.length();
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    }
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    size_t target_pos = res.size();
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    res.resize(res.size()+str.size()-start_pos);
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    str.copy(res.data()+target_pos,str.size()-start_pos,start_pos);
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    return res;
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}
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std::u16string encodeSpecialChars(const std::u16string & text)
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{
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    return replace(replace(text, u"\n", u"
"), u"\"", u""");
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}
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std::u16string decodeSpecialChars(const std::u16string & text)
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{
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    return replace(replace(text, u"
", u"\n"), u""", u"\"");
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}
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void replaceAll(std::string &str, const std::string &from, const std::string &to)
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{
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    if(from.empty())
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        return;
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    size_t start_pos = 0;
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    while((start_pos = str.find(from, start_pos)) != std::string::npos)
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    {
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        str.replace(start_pos, from.length(), to);
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        start_pos += to.length(); // In case 'to' contains 'from', like replacing 'x' with 'yx'
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    }
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}
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std::string encodeSpecialChars(const std::string & text)
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{
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    std::string res = text;
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    replaceAll(res, "\n", "
");
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    replaceAll(res, "\"", """);
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    return res;
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}
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std::string decodeSpecialChars(const std::string & text)
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{
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    std::string res = text;
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    replaceAll(res, """, "\"");
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    replaceAll(res, "
", "\n");
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    return res;
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}
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}
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