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#ifndef Py_GRAMMAR_H
#define Py_GRAMMAR_H
#ifdef __cplusplus
extern "C" {
#endif
/***********************************************************
Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
The Netherlands.
All Rights Reserved
Copyright (c) 2000, BeOpen.com.
Copyright (c) 1995-2000, Corporation for National Research Initiatives.
Copyright (c) 1990-1995, Stichting Mathematisch Centrum.
All rights reserved.
See the file "Misc/COPYRIGHT" for information on usage and
redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES.
******************************************************************/
/* Grammar interface */
#include "bitset.h" /* Sigh... */
/* A label of an arc */
typedef struct {
int lb_type;
char *lb_str;
} label;
#define EMPTY 0 /* Label number 0 is by definition the empty label */
/* A list of labels */
typedef struct {
int ll_nlabels;
label *ll_label;
} labellist;
/* An arc from one state to another */
typedef struct {
short a_lbl; /* Label of this arc */
short a_arrow; /* State where this arc goes to */
} arc;
/* A state in a DFA */
typedef struct {
int s_narcs;
arc *s_arc; /* Array of arcs */
/* Optional accelerators */
int s_lower; /* Lowest label index */
int s_upper; /* Highest label index */
int *s_accel; /* Accelerator */
int s_accept; /* Nonzero for accepting state */
} state;
/* A DFA */
typedef struct {
int d_type; /* Non-terminal this represents */
char *d_name; /* For printing */
int d_initial; /* Initial state */
int d_nstates;
state *d_state; /* Array of states */
bitset d_first;
} dfa;
/* A grammar */
typedef struct {
int g_ndfas;
dfa *g_dfa; /* Array of DFAs */
labellist g_ll;
int g_start; /* Start symbol of the grammar */
int g_accel; /* Set if accelerators present */
} grammar;
/* FUNCTIONS */
grammar *newgrammar Py_PROTO((int start));
dfa *adddfa Py_PROTO((grammar *g, int type, char *name));
int addstate Py_PROTO((dfa *d));
void addarc Py_PROTO((dfa *d, int from, int to, int lbl));
dfa *PyGrammar_FindDFA Py_PROTO((grammar *g, int type));
char *typename Py_PROTO((grammar *g, int lbl));
int addlabel Py_PROTO((labellist *ll, int type, char *str));
int findlabel Py_PROTO((labellist *ll, int type, char *str));
char *PyGrammar_LabelRepr Py_PROTO((label *lb));
void translatelabels Py_PROTO((grammar *g));
void addfirstsets Py_PROTO((grammar *g));
void PyGrammar_AddAccelerators Py_PROTO((grammar *g));
void PyGrammar_RemoveAccelerators Py_PROTO((grammar *));
void printgrammar Py_PROTO((grammar *g, FILE *fp));
void printnonterminals Py_PROTO((grammar *g, FILE *fp));
#ifdef __cplusplus
}
#endif
#endif /* !Py_GRAMMAR_H */
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