mirror of
https://github.com/python/cpython.git
synced 2024-11-25 10:54:51 +08:00
125 lines
3.6 KiB
C
125 lines
3.6 KiB
C
#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
|
|
|
|
Permission to use, copy, modify, and distribute this software and its
|
|
documentation for any purpose and without fee is hereby granted,
|
|
provided that the above copyright notice appear in all copies and that
|
|
both that copyright notice and this permission notice appear in
|
|
supporting documentation, and that the names of Stichting Mathematisch
|
|
Centrum or CWI or Corporation for National Research Initiatives or
|
|
CNRI not be used in advertising or publicity pertaining to
|
|
distribution of the software without specific, written prior
|
|
permission.
|
|
|
|
While CWI is the initial source for this software, a modified version
|
|
is made available by the Corporation for National Research Initiatives
|
|
(CNRI) at the Internet address ftp://ftp.python.org.
|
|
|
|
STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH
|
|
REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF
|
|
MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH
|
|
CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL
|
|
DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR
|
|
PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
|
|
TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
|
|
PERFORMANCE OF THIS SOFTWARE.
|
|
|
|
******************************************************************/
|
|
|
|
/* 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 */
|