MapleToComplexFloat32 - Maple Help

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MapleToComplexFloat32

convert a Maple object to a 32-bit complex float pair

MapleToComplexFloat64

convert a Maple object to a 64-bit complex float pair

MapleToComplexFloatDAG

convert a Maple object to a complex software float pair

MapleToFloat32

convert a Maple object to a 32-bit float

MapleToFloat64

convert a Maple object to a 64-bit float

MapleToInteger8

convert a Maple object to a 8-bit integer

MapleToInteger16

convert a Maple object to a 16-bit integer

MapleToInteger32

convert a Maple object to a 32-bit integer

MapleToInteger64

convert a Maple object to a 64-bit integer

MapleToM_BOOL

convert a Maple object to a hardware boolean

MapleToM_INT

convert a Maple object to a machine word sized integer

MapleToPointer

return the embedded pointer from Maple pointer object

MapleToString

convert a Maple object to a character array

 

Calling Sequence

Parameters

Description

Examples

Calling Sequence

MapleToComplexFloat32(kv, s)

MapleToComplexFloat64(kv, s)

MapleToComplexFloatDAG(kv, s)

MapleToFloat32(kv, s)

MapleToFloat64(kv, s)

MapleToInteger8(kv, s)

MapleToInteger16(kv, s)

MapleToInteger32(kv, s)

MapleToInteger64(kv, s)

MapleToM_BOOL(kv, s)

MapleToM_INT(kv, s)

MapleToPointer(kv, s)

MapleToString(kv, s)

Parameters

kv

-

kernel handle of type MKernelVector

s

-

Maple object of type ALGEB

Description

• 

These functions can be used in external code with OpenMaple or define_external.

• 

The MapleTo* functions convert a Maple object to a hardware data structure format.  The return values are defined in the supplied header files.

• 

Floating-point numbers may lose precision during the conversion to hardware size data.

• 

Conversion from a Maple string object to an integer returns the ASCII value of the first character in that string.  Conversion from a Maple boolean to an integer returns 1 for true, 0 for false, and -1 for FAIL.

• 

The C version of MapleToString returns the same character array pointer referenced in the given Maple object. This string must not be modified in-place. Modifications must be made on a copy, not the original string returned by MapleToString.

• 

The MapleToPointer conversion returns the pointer given as the first argument of ToMaplePointer. For more information about this data structure, see ?MaplePointer.

• 

Some native types are defined in the header file mplshlib.h.  The types M_INT and M_BOOL are often used for word-sized integer and boolean values. Other types are defined in mpltable.h, including complex structs, and macros for fixed bit size integers.

Examples

    #include <stdlib.h>

    #include "maplec.h"

    ALGEB M_DECL MyCompare( MKernelVector kv, ALGEB *args )

    {

    M_INT argc;

    FLOAT64 a, b;

    char *op;

    argc = MapleNumArgs(kv,(ALGEB)args);

    if( argc != 3 ) {

        MapleRaiseError(kv,"three arguments expected");

            return( NULL );

        }

    op = MapleToString(kv,args[1]);

    a = MapleToFloat64(kv,args[2]);

    b = MapleToFloat64(kv,args[3]);

    MaplePrintf(kv,"Comparing %f %s %fn",a,op,b);

    switch( op[0] ) {

    case '>': return( ToMapleBoolean(kv,a > b) );

    case '<': return( ToMapleBoolean(kv,a < b) );

    case '=': return( ToMapleBoolean(kv,a == b) );

    }

    return( ToMapleBoolean(kv,-1) );

    }

Execute the external function from Maple.

withExternalCalling&colon;

dllExternalLibraryNameHelpExamples&colon;

cmpDefineExternalMyCompare&comma;dll&colon;

cmp>&comma;3.13&comma;3.14

Comparing 3.130000 > 3.140000

false

(1)

cmp=&comma;evalf&pi;&comma;30&comma;evalf&pi;&comma;40

Comparing 3.141593 = 3.141593

true

(2)

cmp!=&comma;1&comma;0

Comparing 1.000000 != 0.000000

FAIL

(3)

See Also

CustomWrapper

define_external

OpenMaple

OpenMaple/C/API

 


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