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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
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Calling Sequence
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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)
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Parameters
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kv
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kernel handle of type MKernelVector
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s
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Maple object of type ALGEB
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Description
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The MapleTo* functions convert a Maple object to a hardware data structure format. The return values are defined in the supplied header files.
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Floating-point numbers may lose precision during the conversion to hardware size data.
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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.
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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.
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The MapleToPointer conversion returns the pointer given as the first argument of ToMaplePointer. For more information about this data structure, see ?MaplePointer.
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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.
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Examples
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#include <stdlib.h>
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#include "maplec.h"
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ALGEB M_DECL MyCompare( MKernelVector kv, ALGEB *args )
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{
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M_INT argc;
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FLOAT64 a, b;
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char *op;
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argc = MapleNumArgs(kv,(ALGEB)args);
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if( argc != 3 ) {
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MapleRaiseError(kv,"three arguments expected");
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return( NULL );
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}
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op = MapleToString(kv,args[1]);
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a = MapleToFloat64(kv,args[2]);
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b = MapleToFloat64(kv,args[3]);
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MaplePrintf(kv,"Comparing %f %s %fn",a,op,b);
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switch( op[0] ) {
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case '>': return( ToMapleBoolean(kv,a > b) );
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case '<': return( ToMapleBoolean(kv,a < b) );
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case '=': return( ToMapleBoolean(kv,a == b) );
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}
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return( ToMapleBoolean(kv,-1) );
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}
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Execute the external function from Maple.
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>
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>
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>
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>
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Comparing 3.130000 > 3.140000
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>
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Comparing 3.141593 = 3.141593
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>
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Comparing 1.000000 != 0.000000
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