%module infinity
/* C99 defines INFINITY
Because INFINITY may be defined by compiler built-ins, we can't use #define.
Instead, expose the variable MYINFINITY and then use %rename to make it INFINITY in the scripting language.
*/
%rename(INFINITY) MYINFINITY;
%{
#include <math.h>
/* C99 math.h defines INFINITY. If not available, this is the fallback. */
#if !defined(INFINITY)
#if defined(_MSC_VER)
union MSVC_EVIL_FLOAT_HACK
{
unsigned __int8 Bytes[4];
float Value;
};
const union MSVC_EVIL_FLOAT_HACK INFINITY_HACK = {{0x00, 0x00, 0x80, 0x7F}};
#define INFINITY (INFINITY_HACK.Value)
#define INFINITY_NO_CONST
#endif
#ifdef __GNUC__
#define INFINITY (__builtin_inf())
#elif defined(__clang__)
#if __has_builtin(__builtin_inf)
#define INFINITY (__builtin_inf())
#endif
#endif
#ifndef INFINITY
#define INFINITY (1e1000)
#endif
#endif
#ifdef INFINITY_NO_CONST
/* To void: error C2099: initializer is not a constant */
double MYINFINITY = 0.0;
void initialise_MYINFINITY(void) {
MYINFINITY = INFINITY;
}
#else
const double MYINFINITY = INFINITY;
void initialise_MYINFINITY(void) {
}
#endif
float use_infinity(float inf_val)
{
return inf_val;
}
%}
/* This will allow us to bind the real INFINITY value through SWIG via MYINFINITY. Use %rename to fix the name. */
const double MYINFINITY = INFINITY;
void initialise_MYINFINITY(void);
/* Use of float is intentional because the original bug was in the float conversion due to overflow checking. */
float use_infinity(float inf_val);
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