Tcl Source Code

    {NULL, NULL}
};

/*
 * Math functions. All are safe.
 */





typedef struct {
    const char *name;		/* Name of the function. The full name is
				 * "::tcl::mathfunc::<name>". */
    Tcl_ObjCmdProc *objCmdProc;	/* Function that evaluates the function */
    double (*fn)(double x);	/* Real function pointer */
} BuiltinFuncDef;
static const BuiltinFuncDef BuiltinFuncTable[] = {
    { "abs",	ExprAbsFunc,	NULL			},
    { "acos",	ExprUnaryFunc,	acos			},
    { "asin",	ExprUnaryFunc,	asin			},
    { "atan",	ExprUnaryFunc,	atan			},
    { "atan2",	ExprBinaryFunc,	(double (*)(double))(void *)(double (*)(double, double)) atan2},
    { "bool",	ExprBoolFunc,	NULL			},
    { "ceil",	ExprCeilFunc,	NULL			},
    { "cos",	ExprUnaryFunc,	cos				},
    { "cosh",	ExprUnaryFunc,	cosh			},
    { "double",	ExprDoubleFunc,	NULL			},
    { "entier",	ExprIntFunc,	NULL			},
    { "exp",	ExprUnaryFunc,	exp				},
    { "floor",	ExprFloorFunc,	NULL			},
    { "fmod",	ExprBinaryFunc,	(double (*)(double))(void *)(double (*)(double, double)) fmod},
    { "hypot",	ExprBinaryFunc,	(double (*)(double))(void *)(double (*)(double, double)) hypot},
    { "int",	ExprIntFunc,	NULL			},
    { "isfinite", ExprIsFiniteFunc, NULL		},
    { "isinf",	ExprIsInfinityFunc, NULL		},
    { "isnan",	ExprIsNaNFunc,	NULL	    	},
    { "isnormal", ExprIsNormalFunc, NULL		},
    { "isqrt",	ExprIsqrtFunc,	NULL			},
    { "issubnormal", ExprIsSubnormalFunc, NULL,	 },
    { "isunordered", ExprIsUnorderedFunc, NULL,	 },
    { "log",	ExprUnaryFunc,	log				},
    { "log10",	ExprUnaryFunc,	log10			},
    { "max",	ExprMaxFunc,	NULL			},
    { "min",	ExprMinFunc,	NULL			},
    { "pow",	ExprBinaryFunc,	(double (*)(double))(void *)(double (*)(double, double)) pow},
    { "rand",	ExprRandFunc,	NULL			},
    { "round",	ExprRoundFunc,	NULL			},
    { "sin",	ExprUnaryFunc,	sin				},
    { "sinh",	ExprUnaryFunc,	sinh			},
    { "sqrt",	ExprSqrtFunc,	NULL			},
    { "srand",	ExprSrandFunc,	NULL			},
    { "tan",	ExprUnaryFunc,	tan				},
    { "tanh",	ExprUnaryFunc,	tanh			},
    { "wide",	ExprWideFunc,	NULL			},
    { NULL, NULL, NULL }
};

/*
 * TIP#174's math operators. All are safe.

    }

#if defined(_WIN32) && !defined(_WIN64) && !defined(_USE_64BIT_TIME_T)
    /* If Tcl is compiled on Win32 using -D_USE_64BIT_TIME_T
     * the result is a binary incompatible with the 'standard' build of
     * Tcl: All extensions using Tcl_StatBuf need to be recompiled in
     * the same way. Therefore, this is not officially supported.
     * In stead, it is recommended to use Win64 or Tcl 9.0 (not released yet)
     */
    if ((offsetof(Tcl_StatBuf,st_atime) != 32)
	    || (offsetof(Tcl_StatBuf,st_ctime) != 40)) {
	Tcl_Panic("<sys/stat.h> is not compatible with MSVC");
    }
#endif

	Tcl_SetObjResult(interp, Tcl_NewDoubleObj(sqrt(d)));
    }
    return TCL_OK;
}

static int
ExprUnaryFunc(
    void *clientData,	/* Contains the address of a function that
				 * takes one double argument and returns a
				 * double result. */
    Tcl_Interp *interp,		/* The interpreter in which to execute the
				 * function. */
    int objc,			/* Actual parameter count */
    Tcl_Obj *const *objv)	/* Actual parameter list */
{
    int code;
    double d;
    double (*func)(double) = (double (*)(double)) clientData;

    if (objc != 2) {
	MathFuncWrongNumArgs(interp, 2, objc, objv);
	return TCL_ERROR;
    }
    code = Tcl_GetDoubleFromObj(interp, objv[1], &d);
#ifdef ACCEPT_NAN

    }
    Tcl_SetObjResult(interp, Tcl_NewDoubleObj(dResult));
    return TCL_OK;
}

static int
ExprBinaryFunc(
    void *clientData,	/* Contains the address of a function that
				 * takes two double arguments and returns a
				 * double result. */
    Tcl_Interp *interp,		/* The interpreter in which to execute the
				 * function. */
    int objc,			/* Actual parameter count. */
    Tcl_Obj *const *objv)	/* Parameter vector. */
{
    int code;
    double d1, d2;
    double (*func)(double, double) = (double (*)(double, double)) clientData;

    if (objc != 3) {
	MathFuncWrongNumArgs(interp, 3, objc, objv);
	return TCL_ERROR;
    }
    code = Tcl_GetDoubleFromObj(interp, objv[1], &d1);
#ifdef ACCEPT_NAN

		const char *bytes = TclGetStringFromObj(objv[1], &numBytes);

		while (numBytes) {
		    if (*bytes == '-') {
			Tcl_SetObjResult(interp, Tcl_NewWideIntObj(0));
			return TCL_OK;
		    }
		    bytes++; numBytes--;

		}
	    }
	    goto unChanged;
	} else if (l == WIDE_MIN) {
	    if (sizeof(Tcl_WideInt) > sizeof(int64_t)) {
		Tcl_WideUInt ul = -(Tcl_WideUInt)WIDE_MIN;
		if (mp_init(&big) != MP_OKAY || mp_unpack(&big, 1, 1,