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#include "fast_float/fast_float.h"
#include <cctype>
#include <iostream>
#include <stdexcept>
#include <string>
#include <system_error>
#include <vector>
inline void Assert(bool Assertion) {
if (!Assertion) {
throw std::runtime_error("bug");
}
}
template <typename T> bool test() {
std::string input = "0.156250000000000000000000000000000000000000 "
"3.14159265358979323846264338327950288419716939937510 "
"2.71828182845904523536028747135266249775724709369995";
std::vector<T> answers = {T(0.15625), T(3.141592653589793),
T(2.718281828459045)};
char const *begin = input.data();
char const *end = input.data() + input.size();
for (size_t i = 0; i < answers.size(); i++) {
T result_value;
while ((begin < end) && (std::isspace(*begin))) {
begin++;
}
auto result = fast_float::from_chars(begin, end, result_value);
if (result.ec != std::errc() &&
result.ec != std::errc::result_out_of_range) {
printf("parsing %.*s\n", int(end - begin), begin);
std::cerr << " I could not parse " << std::endl;
return false;
}
if (result_value != answers[i]) {
printf("parsing %.*s\n", int(end - begin), begin);
std::cerr << " Mismatch " << std::endl;
std::cerr << " Expected " << answers[i] << std::endl;
std::cerr << " Got " << result_value << std::endl;
return false;
}
begin = result.ptr;
}
if (begin != end) {
std::cerr << " bad ending " << std::endl;
return false;
}
return true;
}
int main() {
std::cout << "32 bits checks" << std::endl;
Assert(test<float>());
std::cout << "64 bits checks" << std::endl;
Assert(test<double>());
std::cout << "All ok" << std::endl;
return EXIT_SUCCESS;
}
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