10717cc791
+ Addition of function prototypes and include files. + Change function definitions to ANSI C style. - Remove support for generating K&R code. - Remove mkstemp and replace by tmpnam (more portable but less safe)
76 lines
1.8 KiB
C
76 lines
1.8 KiB
C
/* Copyright (c) 1991 by the Vrije Universiteit, Amsterdam, the Netherlands.
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* For full copyright and restrictions on use see the file COPYING in the top
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* level of the LLgen tree.
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*/
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#ifndef SETS_H_
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#define SETS_H_
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/*
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* L L G E N
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*
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* An Extended LL(1) Parser Generator
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*
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* Author : Ceriel J.H. Jacobs
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*/
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/*
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* $Id$
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* Some macros that deal with bitsets and their size
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*/
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# define BITS (8 * sizeof (int))
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# define IN(a,i) ((a)[(i)/BITS] & (1<<((i) % BITS)))
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# define NTIN(a,i) ((a)[(i)/BITS+tsetsize]&(1<<((i)%BITS)))
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# define PUTIN(a,i) ((a)[(i)/BITS] |=(1<<((i) % BITS)))
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# define NTPUTIN(a,i) ((a)[(i)/BITS+tsetsize]|=(1<<((i)%BITS)))
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# define NBYTES(n) (((n) + 7) / 8)
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/*
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* The next two macros operate on byte counts!
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*/
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# define NINTS(n) (((n) + (int) (sizeof(int) - 1)) / (int) sizeof(int))
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# define ALIGN(n) (NINTS(n) * (int) sizeof (int))
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extern int tsetsize;
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extern p_set *setptr, *maxptr;
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extern int nbytes;
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/*
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* Initialises some variables needed for setcomputations
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*/
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void setinit(int nt_needed);
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/*
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* Allocate a set that cannot be freed
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*/
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p_set get_set(void);
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/*
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* Allocate a set which can later be freed.
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*/
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p_set setalloc(void);
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/*
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* a = a union b.
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* Return 1 if the set a changed
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*/
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int setunion(register p_set a,register p_set b);
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/*
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* a = a intersect b.
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* return 1 if the result is empty
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*/
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int setintersect(register p_set a,register p_set b);
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/*
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* a = a setminus b
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*/
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void setminus(register p_set a,register p_set b);
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/*
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* Return 1 if the set p is empty
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*/
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int setempty(register p_set p);
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/*
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* The set "set" will serve as a recovery set.
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* Search for it in the table. If not present, enter it.
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* Here is room for improvement. At the moment, the list of
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* sets is examined with linear search.
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*/
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int findindex(p_set set);
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int setcount(register p_set set, int *saved);
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#endif /* SETS_H_ */
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