125 lines
3.6 KiB
C
125 lines
3.6 KiB
C
#ifndef Py_GRAMMAR_H
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#define Py_GRAMMAR_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/***********************************************************
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Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
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The Netherlands.
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All Rights Reserved
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose and without fee is hereby granted,
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provided that the above copyright notice appear in all copies and that
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both that copyright notice and this permission notice appear in
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supporting documentation, and that the names of Stichting Mathematisch
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Centrum or CWI or Corporation for National Research Initiatives or
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CNRI not be used in advertising or publicity pertaining to
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distribution of the software without specific, written prior
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permission.
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While CWI is the initial source for this software, a modified version
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is made available by the Corporation for National Research Initiatives
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(CNRI) at the Internet address ftp://ftp.python.org.
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STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
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REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
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MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
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CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
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DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
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PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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PERFORMANCE OF THIS SOFTWARE.
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******************************************************************/
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/* Grammar interface */
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#include "bitset.h" /* Sigh... */
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/* A label of an arc */
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typedef struct {
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int lb_type;
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char *lb_str;
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} label;
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#define EMPTY 0 /* Label number 0 is by definition the empty label */
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/* A list of labels */
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typedef struct {
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int ll_nlabels;
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label *ll_label;
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} labellist;
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/* An arc from one state to another */
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typedef struct {
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short a_lbl; /* Label of this arc */
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short a_arrow; /* State where this arc goes to */
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} arc;
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/* A state in a DFA */
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typedef struct {
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int s_narcs;
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arc *s_arc; /* Array of arcs */
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/* Optional accelerators */
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int s_lower; /* Lowest label index */
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int s_upper; /* Highest label index */
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int *s_accel; /* Accelerator */
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int s_accept; /* Nonzero for accepting state */
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} state;
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/* A DFA */
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typedef struct {
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int d_type; /* Non-terminal this represents */
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char *d_name; /* For printing */
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int d_initial; /* Initial state */
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int d_nstates;
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state *d_state; /* Array of states */
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bitset d_first;
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} dfa;
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/* A grammar */
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typedef struct {
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int g_ndfas;
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dfa *g_dfa; /* Array of DFAs */
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labellist g_ll;
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int g_start; /* Start symbol of the grammar */
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int g_accel; /* Set if accelerators present */
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} grammar;
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/* FUNCTIONS */
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grammar *newgrammar Py_PROTO((int start));
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dfa *adddfa Py_PROTO((grammar *g, int type, char *name));
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int addstate Py_PROTO((dfa *d));
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void addarc Py_PROTO((dfa *d, int from, int to, int lbl));
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dfa *PyGrammar_FindDFA Py_PROTO((grammar *g, int type));
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char *typename Py_PROTO((grammar *g, int lbl));
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int addlabel Py_PROTO((labellist *ll, int type, char *str));
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int findlabel Py_PROTO((labellist *ll, int type, char *str));
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char *PyGrammar_LabelRepr Py_PROTO((label *lb));
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void translatelabels Py_PROTO((grammar *g));
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void addfirstsets Py_PROTO((grammar *g));
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void PyGrammar_AddAccelerators Py_PROTO((grammar *g));
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void PyGrammar_RemoveAccelerators Py_PROTO((grammar *));
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void printgrammar Py_PROTO((grammar *g, FILE *fp));
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void printnonterminals Py_PROTO((grammar *g, FILE *fp));
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#ifdef __cplusplus
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}
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#endif
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#endif /* !Py_GRAMMAR_H */
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