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Merge pull request #256 from fastfloat/json-accept-empty-exponent

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Allow JSON empty exponent as trailing junk
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Daniel Lemire 2024-07-23 10:28:36 -04:00 committed by GitHub
commit 97036e362c
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2 changed files with 38 additions and 15 deletions
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2
include/fast_float/ascii_number.h
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@ -349,7 +349,7 @@ parsed_number_string_t<UC> parse_number_string(UC const *p, UC const * pend, par
++p;
}
if ((p == pend) || !is_integer(*p)) {
if(!(fmt & chars_format::fixed) || (fmt & FASTFLOAT_JSONFMT)) {
if(!(fmt & chars_format::fixed)) {
// We are in error.
return answer;
}

49
tests/json_fmt.cpp
View File

@ -36,32 +36,55 @@ int main_readme3() {
return EXIT_SUCCESS;
}
int main()
{
const std::vector<double> expected{ -0.2, 0.02, 0.002, 1., 0., std::numeric_limits<double>::infinity() };
const std::vector<std::string> accept{ "-0.2", "0.02", "0.002", "1e+0000", "0e-2", "inf" };
struct ExpectedResult {
double value;
std::string junk_chars;
};
struct AcceptedValue {
std::string input;
ExpectedResult expected;
};
int main() {
const std::vector<AcceptedValue> accept{
{"-0.2", {-0.2, ""}},
{"0.02", {0.02, ""}},
{"0.002", {0.002, ""}},
{"1e+0000", {1., ""}},
{"0e-2", {0., ""}},
{"1e", {1., "e"}},
{"1e+", {1., "e+"}},
{"inf", {std::numeric_limits<double>::infinity(), ""}}};
const std::vector<std::string> reject{"-.2", "00.02", "0.e+1", "00.e+1",
"1e", "1e+", ".25", "+0.25",
"inf", "nan(snan)"};
".25", "+0.25", "inf", "nan(snan)"};
for (std::size_t i = 0; i < accept.size(); ++i)
{
const auto& f = accept[i];
const auto& s = accept[i].input;
const auto& expected = accept[i].expected;
double result;
auto answer = fast_float::from_chars(f.data(), f.data() + f.size(), result, fast_float::chars_format::json_or_infnan);
if (answer.ec != std::errc() || result != expected[i]) {
std::cerr << "json fmt rejected valid json " << f << std::endl;
auto answer = fast_float::from_chars(s.data(), s.data() + s.size(), result, fast_float::chars_format::json_or_infnan);
if (answer.ec != std::errc()) {
std::cerr << "json fmt rejected valid json " << s << std::endl;
return EXIT_FAILURE;
}
if (result != expected.value) {
std::cerr << "json fmt gave wrong result " << s << " (expected " << expected.value << " got " << result << ")" << std::endl;
return EXIT_FAILURE;
}
if (std::string(answer.ptr) != expected.junk_chars) {
std::cerr << "json fmt has wrong trailing characters " << s << " (expected " << expected.junk_chars << " got " << answer.ptr << ")" << std::endl;
return EXIT_FAILURE;
}
}
for (std::size_t i = 0; i < reject.size(); ++i)
{
const auto& f = reject[i];
const auto& s = reject[i];
double result;
auto answer = fast_float::from_chars(f.data(), f.data() + f.size(), result, fast_float::chars_format::json);
auto answer = fast_float::from_chars(s.data(), s.data() + s.size(), result, fast_float::chars_format::json);
if (answer.ec == std::errc()) {
std::cerr << "json fmt accepted invalid json " << f << std::endl;
std::cerr << "json fmt accepted invalid json " << s << std::endl;
return EXIT_FAILURE;
}
}