coffee/fast_float
1
0
Fork 0
mirror of https://github.com/fastfloat/fast_float.git synced 2025-12-06 08:46:49 +08:00
Code Issues Packages Projects Releases Wiki Activity

Added corner cases around max value/infinity

Browse Source
This commit is contained in:
Pavel Novikov 2025-10-04 14:35:17 +03:00
parent 83a4f696d7
commit 88f6c5e367
No known key found for this signature in database
GPG Key ID: F2C305CAE4167D14
1 changed files with 28 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

28
tests/basictest.cpp
View File

@ -1142,6 +1142,15 @@ TEST_CASE("double.inf") {
// DBL_MAX + 0.0000000000000001e308 // DBL_MAX + 0.0000000000000001e308
verify("1.7976931348623159e308", std::numeric_limits<double>::infinity(), verify("1.7976931348623159e308", std::numeric_limits<double>::infinity(),
std::errc::result_out_of_range); std::errc::result_out_of_range);
// ( (2 - 0.5*2^(−52)) * 2^1023 ) smallest number that overflows to infinity
verify("179769313486231580793728971405303415079934132710037826936173778980444"
"968292764750946649017977587207096330286416692887910946555547851940402"
"630657488671505820681908902000708383676273854845817711531764475730270"
"069855571366959622842914819860834936475292719074168444365510704342711"
"559699508093042880177904174497792",
std::numeric_limits<double>::infinity(),
std::errc::result_out_of_range);
} }
TEST_CASE("double.general") { TEST_CASE("double.general") {
@ -1333,6 +1342,15 @@ TEST_CASE("double.general") {
std::numeric_limits<double>::infinity(), std::errc::result_out_of_range); std::numeric_limits<double>::infinity(), std::errc::result_out_of_range);
verify("-2240084132271013504.131248280843119943687942846658579428", verify("-2240084132271013504.131248280843119943687942846658579428",
-0x1.f1660a65b00bfp+60); -0x1.f1660a65b00bfp+60);
// ( (2 - 0.5*2^(−52)) * 2^1023 - 1 ) largest 309 decimal digit number
// that rounds to DBL_MAX
verify("179769313486231580793728971405303415079934132710037826936173778980444"
"968292764750946649017977587207096330286416692887910946555547851940402"
"630657488671505820681908902000708383676273854845817711531764475730270"
"069855571366959622842914819860834936475292719074168444365510704342711"
"559699508093042880177904174497791",
std::numeric_limits<double>::max());
} }
TEST_CASE("double.decimal_point") { TEST_CASE("double.decimal_point") {
@ -1513,6 +1531,11 @@ TEST_CASE("float.inf") {
// FLT_MAX + 0.0000001e38 // FLT_MAX + 0.0000001e38
verify("3.4028236e38", std::numeric_limits<float>::infinity(), verify("3.4028236e38", std::numeric_limits<float>::infinity(),
std::errc::result_out_of_range); std::errc::result_out_of_range);
// ( (2 - 0.5*2^(-23)) * 2^127 ) smallest number that overflows to infinity
verify("340282356779733661637539395458142568448",
std::numeric_limits<float>::infinity(),
std::errc::result_out_of_range);
} }
TEST_CASE("float.general") { TEST_CASE("float.general") {
@ -1526,6 +1549,11 @@ TEST_CASE("float.general") {
// -max // -max
verify("-340282346638528859811704183484516925440", -0x1.fffffep+127f); verify("-340282346638528859811704183484516925440", -0x1.fffffep+127f);
// ( (2 - 0.5*2^(-23)) * 2^127 - 1 ) largest 39 decimal digits number
// that rounds to FLT_MAX
verify("340282356779733661637539395458142568447",
std::numeric_limits<float>::max());
verify("-1e-999", -0.0f, std::errc::result_out_of_range); verify("-1e-999", -0.0f, std::errc::result_out_of_range);
verify("1." verify("1."
"175494140627517859246175898662808184331245864732796240031385942718174" "175494140627517859246175898662808184331245864732796240031385942718174"