55 lines
993 B
C
55 lines
993 B
C
#include "y4.h"
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void gin(int i)
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{
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register *p, *r, *s, *q1, *q2;
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/* enter gotos on nonterminal i into array a */
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ggreed[i] = 0;
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q2 = mem0+ yypgo[i+1] - 1;
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q1 = mem0 + yypgo[i];
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/* now, find a place for it */
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for( p=a; p < &a[ACTSIZE]; ++p )
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{
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if( *p ) continue;
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for( r=q1; r<q2; r+=2 )
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{
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s = p + *r +1;
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if( *s ) goto nextgp;
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if( s > maxa )
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{
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if( (maxa=s) > &a[ACTSIZE] ) error( "a array overflow" );
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}
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}
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/* we have found a spot */
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*p = *q2;
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if( p > maxa )
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{
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if( (maxa=p) > &a[ACTSIZE] ) error( "a array overflow" );
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}
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for( r=q1; r<q2; r+=2 )
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{
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s = p + *r + 1;
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*s = r[1];
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}
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pgo[i] = p-a;
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if( adb>1 ) fprintf( ftable, "Nonterminal %d, entry at %d\n" , i, pgo[i] );
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goto nextgi;
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nextgp:
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;
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}
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error( "cannot place goto %d\n", i );
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nextgi:
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;
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}
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