#ifndef VALUE_HPP
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#define VALUE_HPP
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#include <cstdint>
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#include <string>
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#include <variant>
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#include "VariableTypes.hpp"
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class Value {
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public:
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Variables::Type type = Variables::Type::VT_NULL;
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Variables::DataContainer data;
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Value() : type(Variables::Type::VT_NULL) {}
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Value(Variables::Type t, double val) : type(t), data(std::move(val)) {}
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Value(Variables::Type t, int val) : type(t), data(std::move(val)) {}
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Value(Variables::Type t, const std::string & val) : type(t), data(val) {}
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Value(Variables::Type t, bool val) : type(t), data(std::move(val)) {}
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static Value fromInt(int val) { return Value(Variables::Type::VT_INT, val); }
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static Value fromDouble(double val) { return Value(Variables::Type::VT_DOUBLE, val); }
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static Value fromString(const std::string & val) { return { Variables::Type::VT_STRING, val }; }
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static Value fromBoolean(bool val) { return { Variables::Type::VT_BOOLEAN, val }; }
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std::string ToString() const { return decodeEscapes(Variables::ToString(data, type)); }
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std::string TypeToString() const { return Variables::TypeToString(type); }
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private:
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Value(Variables::Type t, std::variant<int, double, std::string, bool> && val) : type(t), data(std::move(val)) {}
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static std::string decodeEscapes(const std::string & input) {
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std::string result;
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size_t i = 0;
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auto hexToChar = [](const std::string & hex) -> char {
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return static_cast<char>(std::stoi(hex, nullptr, 16));
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};
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auto hexToUTF8 = [](uint32_t codepoint) -> std::string {
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std::string out;
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if (codepoint <= 0x7F) {
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out += static_cast<char>(codepoint);
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} else if (codepoint <= 0x7FF) {
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out += static_cast<char>(0xC0 | ((codepoint >> 6) & 0x1F));
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out += static_cast<char>(0x80 | (codepoint & 0x3F));
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} else if (codepoint <= 0xFFFF) {
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out += static_cast<char>(0xE0 | ((codepoint >> 12) & 0x0F));
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out += static_cast<char>(0x80 | ((codepoint >> 6) & 0x3F));
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out += static_cast<char>(0x80 | (codepoint & 0x3F));
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} else if (codepoint <= 0x10FFFF) {
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out += static_cast<char>(0xF0 | ((codepoint >> 18) & 0x07));
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out += static_cast<char>(0x80 | ((codepoint >> 12) & 0x3F));
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out += static_cast<char>(0x80 | ((codepoint >> 6) & 0x3F));
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out += static_cast<char>(0x80 | (codepoint & 0x3F));
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}
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return out;
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};
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while (i < input.size()) {
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if (input[i] == '\\' && i + 1 < input.size()) {
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char esc = input[i + 1];
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// Standard short escape sequences
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switch (esc) {
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case 'n':
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result += '\n';
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i += 2;
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continue;
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case 't':
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result += '\t';
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i += 2;
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continue;
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case 'r':
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result += '\r';
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i += 2;
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continue;
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case 'b':
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result += '\b';
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i += 2;
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continue;
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case 'f':
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result += '\f';
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i += 2;
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continue;
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case 'v':
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result += '\v';
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i += 2;
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continue;
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case 'a':
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result += '\a';
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i += 2;
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continue;
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case '\\':
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result += '\\';
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i += 2;
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continue;
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case '"':
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result += '"';
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i += 2;
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continue;
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case '\'':
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result += '\'';
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i += 2;
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continue;
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case '?':
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result += '?';
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i += 2;
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continue;
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case '0':
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result += '\0';
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i += 2;
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continue;
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case 'x':
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{
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// Hexadecimal escape: \xHH
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size_t j = i + 2;
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std::string hex;
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while (j < input.size() && std::isxdigit(input[j]) && hex.size() < 2) {
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hex += input[j++];
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}
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if (!hex.empty()) {
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result += hexToChar(hex);
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i = j;
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continue;
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}
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}
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break;
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case 'u':
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case 'U':
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{
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// Unicode escape: \uHHHH or \UHHHHHHHH
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size_t expected_len = (esc == 'u') ? 4 : 8;
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size_t j = i + 2;
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std::string hex;
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while (j < input.size() && std::isxdigit(input[j]) && hex.size() < expected_len) {
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hex += input[j++];
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}
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if (hex.size() == expected_len) {
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uint32_t codepoint = std::stoul(hex, nullptr, 16);
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result += hexToUTF8(codepoint);
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i = j;
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continue;
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}
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}
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break;
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}
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// Ha ide jutunk, ismeretlen vagy érvénytelen escape
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result += '\\';
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result += esc;
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i += 2;
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} else {
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result += input[i++];
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}
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}
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return result;
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}
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};
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#endif // VALUE_HPP
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