77 lines
1.7 KiB
C
77 lines
1.7 KiB
C
// Copyright (c) 1993-1999 Microsoft Corporation
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#include "y3.h"
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/*
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* yapack.3c
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*
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* Modified to make debug code conditionally compile.
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* 28-Aug-81
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* Bob Denny
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*/
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int
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apack(SSIZE_T *p, int n )
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{
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/* pack state i from temp1 into amem */
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int off;
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SSIZE_T *pp, *qq, *rr;
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SSIZE_T *q, *r;
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/* we don't need to worry about checking because we
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we will only look entries known to be there... */
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/* eliminate leading and trailing 0's */
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q = p+n;
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for( pp=p,off=0 ; *pp==0 && pp<=q; ++pp,--off ) /* VOID */ ;
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if( pp > q ) return(0); /* no actions */
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p = pp;
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/* now, find a place for the elements from p to q, inclusive */
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r = &amem[ACTSIZE-1];
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for( rr=amem; rr<=r; ++rr,++off )
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{
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/* try rr */
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for( qq=rr,pp=p ; pp<=q ; ++pp,++qq)
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{
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if( *pp != 0 )
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{
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if( *pp != *qq && *qq != 0 ) goto nextk;
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}
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}
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/* we have found an acceptable k */
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#ifdef debug
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if(foutput!=NULL) fprintf(foutput,"off = %d, k = %d\n",off,rr-amem);
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#endif
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for( qq=rr,pp=p; pp<=q; ++pp,++qq )
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{
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if( *pp )
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{
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if( qq > r ) error( "action table overflow" );
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if( qq>memp ) memp = qq;
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*qq = *pp;
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}
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}
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#ifdef debug
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if( foutput!=NULL )
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{
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for( pp=amem; pp<= memp; pp+=10 )
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{
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fprintf( foutput, "\t");
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for( qq=pp; qq<=pp+9; ++qq ) fprintf( foutput, "%d ", *qq );
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fprintf( foutput, "\n");
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}
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}
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#endif
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return( off );
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nextk:
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;
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}
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error("no space in action table" );
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return off; /* NOTREACHED */
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}
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