66 lines
1.7 KiB
C++
66 lines
1.7 KiB
C++
#include "convert.h"
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void fromDouble(double value) {
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// char
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std::cout << std::setw(7) << std::left << "char";
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if (value < 0 || value > std::numeric_limits<char>::max())
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std::cout << B_RED << "impossible" << RESET "\n";
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else if (!isprint(value))
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std::cout << B_RED << "non displayable" << RESET "\n";
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else
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std::cout << B_CYAN << static_cast<char>(value) << RESET "\n";
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// int
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std::cout << std::setw(7) << std::left << "int";
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if (value < std::numeric_limits<int>::min()
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|| value > std::numeric_limits<int>::max() )
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std::cout << B_RED << "impossible" << RESET "\n";
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else
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std::cout << B_CYAN << static_cast<int>(value) << RESET "\n";
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// float
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std::cout << std::setw(7) << std::left << "float";
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if (value < std::numeric_limits<float>::min()
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|| value > std::numeric_limits<float>::max() )
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std::cout << B_RED << "impossible" << RESET "\n";
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else
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std::cout << B_CYAN << static_cast<double>(value) << RESET "\n";
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}
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bool isDouble(std::string str) {
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size_t l;
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if (str[0] == '+' || str[0] == '-')
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str.erase(str.begin());
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if (str.length() == 0)
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return false;
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if (!str.compare("inf") || !str.compare("nan"))
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return true;
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l = str.find_first_not_of("0123456789");
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if (l == std::string::npos || str[l] != '.' || l > DOUBLE_MAX_LENGTH)
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return false;
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if (str.find_first_not_of("0123456789", l + 1) != std::string::npos)
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return false;
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if (l < DOUBLE_MAX_LENGTH)
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return true;
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if (str.compare(0, l, MAX_DOUBLE) > 0)
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return false;
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return true;
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}
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bool checkDouble(std::string str) {
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double d;
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if (!isDouble(str))
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return false;
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std::istringstream(str) >> d;
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std::cout << B_CYAN << d << B_YELLOW " double" RESET "\n";
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fromDouble(d);
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return true;
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}
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