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MapleKernelOptions - set or query kernel variables and options in external code
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Calling Sequence
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MapleKernelOptions(kv, option, val)
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Parameters
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kv
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kernel handle of type MKernelVector
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option
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character string
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val
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type ALGEB value
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Description
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MapleKernelOptions sets and queries variables that affect Maple computations. For a list of option names and descriptions, see ?kernelopts,
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To query a value without setting it pass val = NULL. The previous assigned value is returned.
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Examples
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#include "maplec.h"
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ALGEB M_DECL MyDelay( MKernelVector kv, ALGEB *args )
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{
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M_INT i, n;
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ALGEB start_time, fin_time;
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double junk;
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if( 1 != MapleNumArgs(kv,(ALGEB)args) ) {
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MapleRaiseError(kv,"one argument expected");
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return( NULL );
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}
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MapleKernelOptions(kv,"assertlevel",ToMapleInteger(kv,2));
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n = MapleToM_INT(kv,args[1]);
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start_time = MapleKernelOptions(kv,"cputime",NULL);
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for( i=1; i<=n; ++i ) {
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junk *= 2;
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}
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MapleAssign(kv,ToMapleName(kv,"myjunk",TRUE),ToMapleFloat(kv,junk));
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fin_time = MapleKernelOptions(kv,"cputime",NULL);
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return( EvalMapleProc(kv,ToMapleName(kv,"-",TRUE),
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2,fin_time,start_time) );
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}
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Execute the external function from Maple.
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