mirror of
https://github.com/fastfloat/fast_float.git
synced 2025-12-06 16:56:57 +08:00
124 lines
4.3 KiB
C++
124 lines
4.3 KiB
C++
/**
|
|
* See https://github.com/eddelbuettel/rcppfastfloat/issues/4
|
|
*/
|
|
|
|
#define FASTFLOAT_ALLOWS_LEADING_PLUS 1
|
|
#define FASTFLOAT_SKIP_WHITE_SPACE 1 // important !
|
|
#include "fast_float/fast_float.h"
|
|
#include <iostream>
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
bool eddelbuettel() {
|
|
std::vector<std::string> inputs = {"infinity",
|
|
" \r\n\t\f\v3.16227766016838 \r\n\t\f\v",
|
|
" \r\n\t\f\v3 \r\n\t\f\v",
|
|
" 1970-01-01",
|
|
"-NaN",
|
|
"-inf",
|
|
" \r\n\t\f\v2.82842712474619 \r\n\t\f\v",
|
|
"nan",
|
|
" \r\n\t\f\v2.44948974278318 \r\n\t\f\v",
|
|
"Inf",
|
|
" \r\n\t\f\v2 \r\n\t\f\v",
|
|
"-infinity",
|
|
" \r\n\t\f\v0 \r\n\t\f\v",
|
|
" \r\n\t\f\v1.73205080756888 \r\n\t\f\v",
|
|
" \r\n\t\f\v1 \r\n\t\f\v",
|
|
" \r\n\t\f\v1.4142135623731 \r\n\t\f\v",
|
|
" \r\n\t\f\v2.23606797749979 \r\n\t\f\v",
|
|
"1970-01-02 ",
|
|
" \r\n\t\f\v2.64575131106459 \r\n\t\f\v",
|
|
"inf",
|
|
"-nan",
|
|
"NaN",
|
|
"",
|
|
"-Inf",
|
|
"+2.2"};
|
|
std::vector<std::pair<bool, double>> expected_results = {
|
|
{true, std::numeric_limits<double>::infinity()},
|
|
{true, 3.16227766016838},
|
|
{true, 3},
|
|
{false, -1},
|
|
{true, std::numeric_limits<double>::quiet_NaN()},
|
|
{true, -std::numeric_limits<double>::infinity()},
|
|
{true, 2.82842712474619},
|
|
{true, std::numeric_limits<double>::quiet_NaN()},
|
|
{true, 2.44948974278318},
|
|
{true, std::numeric_limits<double>::infinity()},
|
|
{true, 2},
|
|
{true, -std::numeric_limits<double>::infinity()},
|
|
{true, 0},
|
|
{true, 1.73205080756888},
|
|
{true, 1},
|
|
{true, 1.4142135623731},
|
|
{true, 2.23606797749979},
|
|
{false, -1},
|
|
{true, 2.64575131106459},
|
|
{true, std::numeric_limits<double>::infinity()},
|
|
{true, std::numeric_limits<double>::quiet_NaN()},
|
|
{true, std::numeric_limits<double>::quiet_NaN()},
|
|
{false, -1},
|
|
{true, -std::numeric_limits<double>::infinity()},
|
|
{true, 2.2}};
|
|
for (size_t i = 0; i < inputs.size(); i++) {
|
|
std::string &input = inputs[i];
|
|
std::pair<bool, double> expected = expected_results[i];
|
|
double result;
|
|
// answer contains a error code and a pointer to the end of the
|
|
// parsed region (on success).
|
|
auto answer = fast_float::from_chars(input.data(),
|
|
input.data() + input.size(), result);
|
|
if (answer.ec != std::errc()) {
|
|
std::cout << "could not parse" << std::endl;
|
|
if (expected.first) {
|
|
return false;
|
|
}
|
|
continue;
|
|
}
|
|
bool non_space_trailing_content = false;
|
|
if (answer.ptr != input.data() + input.size()) {
|
|
// check that there is no content left
|
|
for (const char *leftover = answer.ptr;
|
|
leftover != input.data() + input.size(); leftover++) {
|
|
if (!fast_float::is_space(uint8_t(*leftover))) {
|
|
non_space_trailing_content = true;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
if (non_space_trailing_content) {
|
|
std::cout << "found trailing content " << std::endl;
|
|
}
|
|
|
|
if (non_space_trailing_content) {
|
|
if (!expected.first) {
|
|
continue;
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
std::cout << "parsed " << result << std::endl;
|
|
if (!expected.first) {
|
|
return false;
|
|
}
|
|
if (result != expected.second) {
|
|
if (std::isnan(result) && std::isnan(expected.second)) {
|
|
continue;
|
|
}
|
|
std::cout << "results do not match. Expected "<< expected.second << std::endl;
|
|
return false;
|
|
}
|
|
}
|
|
return true;
|
|
}
|
|
|
|
int main() {
|
|
if (!eddelbuettel()) {
|
|
printf("Bug.\n");
|
|
return EXIT_FAILURE;
|
|
}
|
|
printf("All ok.\n");
|
|
return EXIT_SUCCESS;
|
|
}
|