Fix #13: math: Use a math.* namespace

cmake/chaiscript.cmake

@@ -1,4 +1,4 @@
-set(CHAISCRIPT_VERSION 5.8.6)
+set(CHAISCRIPT_VERSION 6.1.0)
 find_package(chaiscript ${CHAISCRIPT_VERSION} QUIET)
 
 if (NOT chaiscript_FOUND)

include/chaiscript/extras/math.hpp

@@ -828,6 +828,121 @@ namespace chaiscript {
 
         return m;
       }
+
+      /// \brief Registers a "math" namespace on the given ChaiScript engine,
+      ///        exposing the standard C++ math functions as attributes of
+      ///        the namespace (e.g. \c math.cos(x), \c math.sqrt(x)).
+      ///
+      /// Uses ChaiScript's native \c register_namespace API so that the
+      /// functions live inside a real namespace object rather than being
+      /// attached to a global variable. The namespace is lazily populated
+      /// when it is first imported.
+      inline void bootstrap_namespace(chaiscript::ChaiScript &chai)
+      {
+        chai.register_namespace([](chaiscript::Namespace &math) {
+          // TRIG FUNCTIONS
+          math["cos"]   = chaiscript::var(chaiscript::fun([](double p){ return std::cos(p); }));
+          math["sin"]   = chaiscript::var(chaiscript::fun([](double p){ return std::sin(p); }));
+          math["tan"]   = chaiscript::var(chaiscript::fun([](double p){ return std::tan(p); }));
+          math["acos"]  = chaiscript::var(chaiscript::fun([](double p){ return std::acos(p); }));
+          math["asin"]  = chaiscript::var(chaiscript::fun([](double p){ return std::asin(p); }));
+          math["atan"]  = chaiscript::var(chaiscript::fun([](double p){ return std::atan(p); }));
+          math["atan2"] = chaiscript::var(chaiscript::fun([](double y, double x){ return std::atan2(y, x); }));
+
+          // HYPERBOLIC FUNCTIONS
+          math["cosh"] = chaiscript::var(chaiscript::fun([](double p){ return std::cosh(p); }));
+          math["sinh"] = chaiscript::var(chaiscript::fun([](double p){ return std::sinh(p); }));
+          math["tanh"] = chaiscript::var(chaiscript::fun([](double p){ return std::tanh(p); }));
+
+#ifndef CHAISCRIPT_EXTRAS_MATH_SKIP_ADVANCED
+          math["acosh"] = chaiscript::var(chaiscript::fun([](double p){ return std::acosh(p); }));
+          math["asinh"] = chaiscript::var(chaiscript::fun([](double p){ return std::asinh(p); }));
+          math["atanh"] = chaiscript::var(chaiscript::fun([](double p){ return std::atanh(p); }));
+#endif
+
+          // EXPONENTIAL AND LOGARITHMIC FUNCTIONS
+          math["exp"]   = chaiscript::var(chaiscript::fun([](double p){ return std::exp(p); }));
+          math["log"]   = chaiscript::var(chaiscript::fun([](double p){ return std::log(p); }));
+          math["log10"] = chaiscript::var(chaiscript::fun([](double p){ return std::log10(p); }));
+
+#ifndef CHAISCRIPT_EXTRAS_MATH_SKIP_ADVANCED
+          math["exp2"]  = chaiscript::var(chaiscript::fun([](double p){ return std::exp2(p); }));
+          math["expm1"] = chaiscript::var(chaiscript::fun([](double p){ return std::expm1(p); }));
+          math["ilogb"] = chaiscript::var(chaiscript::fun([](double p){ return std::ilogb(p); }));
+          math["log1p"] = chaiscript::var(chaiscript::fun([](double p){ return std::log1p(p); }));
+          math["log2"]  = chaiscript::var(chaiscript::fun([](double p){ return std::log2(p); }));
+          math["logb"]  = chaiscript::var(chaiscript::fun([](double p){ return std::logb(p); }));
+#endif
+
+          // POWER FUNCTIONS
+          math["pow"]  = chaiscript::var(chaiscript::fun([](double x, double y){ return std::pow(x, y); }));
+          math["sqrt"] = chaiscript::var(chaiscript::fun([](double p){ return std::sqrt(p); }));
+
+#ifndef CHAISCRIPT_EXTRAS_MATH_SKIP_ADVANCED
+          math["cbrt"]  = chaiscript::var(chaiscript::fun([](double p){ return std::cbrt(p); }));
+          math["hypot"] = chaiscript::var(chaiscript::fun([](double x, double y){ return std::hypot(x, y); }));
+
+          // ERROR AND GAMMA FUNCTIONS
+          math["erf"]    = chaiscript::var(chaiscript::fun([](double p){ return std::erf(p); }));
+          math["erfc"]   = chaiscript::var(chaiscript::fun([](double p){ return std::erfc(p); }));
+          math["tgamma"] = chaiscript::var(chaiscript::fun([](double p){ return std::tgamma(p); }));
+          math["lgamma"] = chaiscript::var(chaiscript::fun([](double p){ return std::lgamma(p); }));
+#endif
+
+          // ROUNDING AND REMAINDER FUNCTIONS
+          math["ceil"]  = chaiscript::var(chaiscript::fun([](double p){ return std::ceil(p); }));
+          math["floor"] = chaiscript::var(chaiscript::fun([](double p){ return std::floor(p); }));
+          math["fmod"]  = chaiscript::var(chaiscript::fun([](double x, double y){ return std::fmod(x, y); }));
+
+#ifndef CHAISCRIPT_EXTRAS_MATH_SKIP_ADVANCED
+          math["trunc"]     = chaiscript::var(chaiscript::fun([](double p){ return std::trunc(p); }));
+          math["round"]     = chaiscript::var(chaiscript::fun([](double p){ return std::round(p); }));
+          math["lround"]    = chaiscript::var(chaiscript::fun([](double p){ return std::lround(p); }));
+          math["llround"]   = chaiscript::var(chaiscript::fun([](double p){ return std::llround(p); }));
+          math["rint"]      = chaiscript::var(chaiscript::fun([](double p){ return std::rint(p); }));
+          math["lrint"]     = chaiscript::var(chaiscript::fun([](double p){ return std::lrint(p); }));
+          math["llrint"]    = chaiscript::var(chaiscript::fun([](double p){ return std::llrint(p); }));
+          math["nearbyint"] = chaiscript::var(chaiscript::fun([](double p){ return std::nearbyint(p); }));
+          math["remainder"] = chaiscript::var(chaiscript::fun([](double x, double y){ return std::remainder(x, y); }));
+
+          // FLOATING-POINT MANIPULATION FUNCTIONS
+          math["copysign"]   = chaiscript::var(chaiscript::fun([](double x, double y){ return std::copysign(x, y); }));
+          math["nextafter"]  = chaiscript::var(chaiscript::fun([](double x, double y){ return std::nextafter(x, y); }));
+          math["nexttoward"] = chaiscript::var(chaiscript::fun([](double x, long double y){ return std::nexttoward(x, y); }));
+
+          // MINIMUM, MAXIMUM, DIFFERENCE FUNCTIONS
+          math["fdim"] = chaiscript::var(chaiscript::fun([](double x, double y){ return std::fdim(x, y); }));
+          math["fmax"] = chaiscript::var(chaiscript::fun([](double x, double y){ return std::fmax(x, y); }));
+          math["fmin"] = chaiscript::var(chaiscript::fun([](double x, double y){ return std::fmin(x, y); }));
+
+          // OTHER FUNCTIONS
+          math["fabs"] = chaiscript::var(chaiscript::fun([](double p){ return std::fabs(p); }));
+#endif
+
+          math["abs"] = chaiscript::var(chaiscript::fun([](double p){ return std::abs(p); }));
+
+#ifndef CHAISCRIPT_EXTRAS_MATH_SKIP_ADVANCED
+          math["fma"] = chaiscript::var(chaiscript::fun([](double x, double y, double z){ return std::fma(x, y, z); }));
+
+          // CLASSIFICATION FUNCTIONS
+          math["fpclassify"] = chaiscript::var(chaiscript::fun([](double p){ return std::fpclassify(p); }));
+#endif
+
+          math["isfinite"] = chaiscript::var(chaiscript::fun([](double p){ return std::isfinite(p); }));
+          math["isinf"]    = chaiscript::var(chaiscript::fun([](double p){ return std::isinf(p); }));
+          math["isnan"]    = chaiscript::var(chaiscript::fun([](double p){ return std::isnan(p); }));
+          math["isnormal"] = chaiscript::var(chaiscript::fun([](double p){ return std::isnormal(p); }));
+          math["signbit"]  = chaiscript::var(chaiscript::fun([](double p){ return std::signbit(p); }));
+
+          // COMPARISON FUNCTIONS
+          math["isgreater"]      = chaiscript::var(chaiscript::fun([](double x, double y){ return std::isgreater(x, y); }));
+          math["isgreaterequal"] = chaiscript::var(chaiscript::fun([](double x, double y){ return std::isgreaterequal(x, y); }));
+          math["isless"]         = chaiscript::var(chaiscript::fun([](double x, double y){ return std::isless(x, y); }));
+          math["islessequal"]    = chaiscript::var(chaiscript::fun([](double x, double y){ return std::islessequal(x, y); }));
+          math["islessgreater"]  = chaiscript::var(chaiscript::fun([](double x, double y){ return std::islessgreater(x, y); }));
+          math["isunordered"]    = chaiscript::var(chaiscript::fun([](double x, double y){ return std::isunordered(x, y); }));
+        }, "math");
+      }
     }
   }
 }

tests/catch.hpp

@@ -6462,7 +6462,8 @@ namespace Catch {
         static bool isSet;
         static struct sigaction oldSigActions[];// [sizeof(signalDefs) / sizeof(SignalDefs)];
         static stack_t oldSigStack;
-        static char altStackMem[];
+        static constexpr std::size_t altStackSize = 32768;
+        static char altStackMem[altStackSize];
 
         static void handleSignal( int sig );
 
@@ -6597,7 +6598,7 @@ namespace Catch {
         isSet = true;
         stack_t sigStack;
         sigStack.ss_sp = altStackMem;
-        sigStack.ss_size = SIGSTKSZ;
+        sigStack.ss_size = altStackSize;
         sigStack.ss_flags = 0;
         sigaltstack(&sigStack, &oldSigStack);
         struct sigaction sa = { };
@@ -6628,7 +6629,7 @@ namespace Catch {
     bool FatalConditionHandler::isSet = false;
     struct sigaction FatalConditionHandler::oldSigActions[sizeof(signalDefs)/sizeof(SignalDefs)] = {};
     stack_t FatalConditionHandler::oldSigStack = {};
-    char FatalConditionHandler::altStackMem[SIGSTKSZ] = {};
+    char FatalConditionHandler::altStackMem[FatalConditionHandler::altStackSize] = {};
 
 } // namespace Catch
 

tests/math.cpp

@@ -8,11 +8,39 @@
 
 #include <iostream>
 
+TEST_CASE( "Math namespace works", "[math]" ) {
+  chaiscript::ChaiScript chai;
+  chaiscript::extras::math::bootstrap_namespace(chai);
+  chai.eval(R"(import("math"))");
+
+  // Trig
+  CHECK(chai.eval<double>("math.cos(0.5)") == std::cos(0.5));
+  CHECK(chai.eval<double>("math.sin(0.5)") == std::sin(0.5));
+  CHECK(chai.eval<double>("math.tan(0.5)") == std::tan(0.5));
+  CHECK(chai.eval<double>("math.acos(0.5)") == std::acos(0.5));
+  CHECK(chai.eval<double>("math.asin(0.5)") == std::asin(0.5));
+  CHECK(chai.eval<double>("math.atan(0.5)") == std::atan(0.5));
+  CHECK(chai.eval<double>("math.atan2(0.5, 0.5)") == std::atan2(0.5, 0.5));
+
+  // Power
+  CHECK(chai.eval<double>("math.pow(0.5, 3.0)") == std::pow(0.5, 3.0));
+  CHECK(chai.eval<double>("math.sqrt(0.5)") == std::sqrt(0.5));
+
+  // Rounding
+  CHECK(chai.eval<double>("math.ceil(0.5)") == std::ceil(0.5));
+  CHECK(chai.eval<double>("math.floor(0.5)") == std::floor(0.5));
+  CHECK(chai.eval<double>("math.abs(-0.5)") == std::abs(-0.5));
+
+  // Exponential
+  CHECK(chai.eval<double>("math.exp(0.5)") == std::exp(0.5));
+  CHECK(chai.eval<double>("math.log(0.5)") == std::log(0.5));
+  CHECK(chai.eval<double>("math.log10(0.5)") == std::log10(0.5));
+}
+
 TEST_CASE( "Math functions work", "[math]" ) {
   auto mathlib = chaiscript::extras::math::bootstrap();
 
-  auto stdlib = chaiscript::Std_Lib::library();
-  chaiscript::ChaiScript chai(stdlib);
+  chaiscript::ChaiScript chai;
   chai.add(mathlib);
 
   // TRIG FUNCTIONS

tests/string_methods.cpp

@@ -8,8 +8,7 @@
 
 TEST_CASE( "string_methods functions work", "[string_methods]" ) {
   // Create the ChaiScript environment with stdlib available.
-  auto stdlib = chaiscript::Std_Lib::library();
-  chaiscript::ChaiScript chai(stdlib);
+  chaiscript::ChaiScript chai;
 
   // Add the string_methods module.
   auto stringmethods = chaiscript::extras::string_methods::bootstrap();