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ocaml/yacc/defs.h

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/**************************************************************************/
/* */
/* OCaml */
/* */
/* Xavier Leroy, projet Cristal, INRIA Rocquencourt */
/* */
/* Copyright 1996 Institut National de Recherche en Informatique et */
/* en Automatique. */
/* */
/* All rights reserved. This file is distributed under the terms of */
/* the GNU Lesser General Public License version 2.1, with the */
/* special exception on linking described in the file LICENSE. */
/* */
/**************************************************************************/
/* Based on public-domain code from Berkeley Yacc */
#ifndef DEBUG
#define NDEBUG
#endif
#include <assert.h>
#include <ctype.h>
#include <errno.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define CAML_INTERNALS
#include "caml/config.h"
#include "caml/mlvalues.h"
#include "caml/osdeps.h"
#define caml_stat_strdup strdup
/* machine-dependent definitions */
/* the following definitions are for the Tahoe */
/* they might have to be changed for other machines */
/* MAXCHAR is the largest unsigned character value */
/* MAXSHORT is the largest value of a C short */
/* MINSHORT is the most negative value of a C short */
/* MAXTABLE is the maximum table size */
/* BITS_PER_WORD is the number of bits in a C unsigned */
/* WORDSIZE computes the number of words needed to */
/* store n bits */
/* BIT returns the value of the n-th bit starting */
/* from r (0-indexed) */
/* SETBIT sets the n-th bit starting from r */
#define MAXCHAR UCHAR_MAX
#define MAXSHORT SHRT_MAX
#define MINSHORT SHRT_MIN
#define MAXTABLE 32500
#define BITS_PER_WORD (8*sizeof(unsigned))
#define WORDSIZE(n) (((n)+(BITS_PER_WORD-1))/BITS_PER_WORD)
#define BIT(r, n) ((((r)[(n)/BITS_PER_WORD])>>((n)%BITS_PER_WORD))&1)
#define SETBIT(r, n) ((r)[(n)/BITS_PER_WORD]|=(1<<((n)%BITS_PER_WORD)))
/* character names */
#define NUL '\0' /* the null character */
#define NEWLINE '\n' /* line feed */
#define SP ' ' /* space */
#define BS '\b' /* backspace */
#define HT '\t' /* horizontal tab */
#define VT '\013' /* vertical tab */
#define CR '\r' /* carriage return */
#define FF '\f' /* form feed */
#define QUOTE '\'' /* single quote */
#define DOUBLE_QUOTE '\"' /* double quote */
#define BACKSLASH '\\' /* backslash */
/* defines for constructing filenames */
#define OUTPUT_SUFFIX T(".ml")
#define VERBOSE_SUFFIX T(".output")
#define INTERFACE_SUFFIX T(".mli")
/* keyword codes */
#define TOKEN 0
#define LEFT 1
#define RIGHT 2
#define NONASSOC 3
#define MARK 4
#define TEXT 5
#define TYPE 6
#define START 7
/* symbol classes */
#define UNKNOWN 0
#define TERM 1
#define NONTERM 2
/* the undefined value */
#define UNDEFINED (-1)
/* action codes */
#define SHIFT 1
#define REDUCE 2
/* character macros */
#define IS_IDENT(c) (isalnum(c) || (c) == '_' || (c) == '.' || (c) == '$')
#define IS_OCTAL(c) ((c) >= '0' && (c) <= '7')
#define NUMERIC_VALUE(c) ((c) - '0')
/* symbol macros */
#define ISTOKEN(s) ((s) < start_symbol)
#define ISVAR(s) ((s) >= start_symbol)
/* storage allocation macros */
#define CALLOC(k,n) (calloc((unsigned)(k),(unsigned)(n)))
#define FREE(x) (free((char*)(x)))
#define MALLOC(n) (malloc((unsigned)(n)))
#define NEW(t) ((t*)allocate(sizeof(t)))
#define NEW2(n,t) ((t*)allocate((unsigned)((n)*sizeof(t))))
#define REALLOC(p,n) (realloc((char*)(p),(unsigned)(n)))
/* the structure of a symbol table entry */
typedef struct bucket bucket;
struct bucket
{
struct bucket *link;
struct bucket *next;
char *name;
char *tag;
short value;
short index;
short prec;
char class;
char assoc;
unsigned char entry; /* 1..MAX_ENTRY_POINT (0 for unassigned) */
char true_token;
};
/* MAX_ENTRY_POINT is the maximal number of entry points into the grammar. */
/* Entry points are identified by a non-zero byte in the input stream, */
/* so there are at most 255 entry points. */
#define MAX_ENTRY_POINT MAXCHAR
/* TABLE_SIZE is the number of entries in the symbol table. */
/* TABLE_SIZE must be a power of two. */
#define TABLE_SIZE 4096
/* the structure of the LR(0) state machine */
typedef struct core core;
struct core
{
struct core *next;
struct core *link;
short number;
short accessing_symbol;
short nitems;
short items[1];
};
/* the structure used to record shifts */
typedef struct shifts shifts;
struct shifts
{
struct shifts *next;
short number;
short nshifts;
short shift[1];
};
/* the structure used to store reductions */
typedef struct reductions reductions;
struct reductions
{
struct reductions *next;
short number;
short nreds;
short rules[1];
};
/* the structure used to represent parser actions */
typedef struct action action;
struct action
{
struct action *next;
short symbol;
short number;
short prec;
char action_code;
char assoc;
char suppressed;
};
/* global variables */
extern char lflag;
extern char rflag;
extern char tflag;
extern char vflag;
extern char qflag;
extern char sflag;
extern char eflag;
extern char big_endian;
/* myname should be UTF-8 encoded */
extern char *myname;
extern char *cptr;
extern char *line;
extern int lineno;
/* virtual_input_file_name should be UTF-8 encoded */
extern char *virtual_input_file_name;
extern int outline;
extern char_os *action_file_name;
extern char_os *entry_file_name;
extern char_os *code_file_name;
extern char_os *input_file_name;
extern char_os *output_file_name;
extern char_os *text_file_name;
extern char_os *verbose_file_name;
extern char_os *interface_file_name;
/* UTF-8 versions of code_file_name and input_file_name */
extern char *code_file_name_disp;
extern char *input_file_name_disp;
extern FILE *action_file;
extern FILE *entry_file;
extern FILE *code_file;
extern FILE *input_file;
extern FILE *output_file;
extern FILE *text_file;
extern FILE *verbose_file;
extern FILE *interface_file;
extern int nitems;
extern int nrules;
extern int ntotalrules;
extern int nsyms;
extern int ntokens;
extern int nvars;
extern int ntags;
#define line_format "# %d \"%s\"\n"
extern int start_symbol;
extern char **symbol_name;
extern short *symbol_value;
extern short *symbol_prec;
extern char *symbol_assoc;
extern char **symbol_tag;
extern char *symbol_true_token;
extern short *ritem;
extern short *rlhs;
extern short *rrhs;
extern short *rprec;
extern char *rassoc;
extern short **derives;
extern char *nullable;
extern bucket *first_symbol;
extern bucket *last_symbol;
extern int nstates;
extern core *first_state;
extern shifts *first_shift;
extern reductions *first_reduction;
extern short *accessing_symbol;
extern core **state_table;
extern shifts **shift_table;
extern reductions **reduction_table;
extern unsigned *LA;
extern short *LAruleno;
extern short *lookaheads;
extern short *goto_map;
extern short *from_state;
extern short *to_state;
extern action **parser;
extern int SRtotal;
extern int RRtotal;
extern short *SRconflicts;
extern short *RRconflicts;
extern short *defred;
extern short *rules_used;
extern short nunused;
extern short final_state;
/* global functions */
extern char *allocate(unsigned int n);
extern bucket *lookup(char *name);
extern bucket *make_bucket(char *name);
extern action *parse_actions(register int stateno);
extern action *get_shifts(int stateno);
extern action *add_reductions(int stateno, register action *actions);
extern action *add_reduce(register action *actions, register int ruleno, register int symbol);
extern void closure (short int *nucleus, int n);
extern void create_symbol_table (void);
extern void default_action_error (void) Noreturn;
extern void done (int k) Noreturn;
extern void entry_without_type (char *s) Noreturn;
extern void fatal (char *msg) Noreturn;
extern void finalize_closure (void);
extern void free_parser (void);
extern void free_symbol_table (void);
extern void free_symbols (void);
extern void illegal_character (char *c_cptr) Noreturn;
extern void illegal_token_ref (int i, char *name) Noreturn;
extern void lalr (void);
extern void lr0 (void);
extern void make_parser (void);
extern void no_grammar (void) Noreturn;
extern void no_space (void) Noreturn;
extern void open_error (char_os *filename) Noreturn;
extern void output (void);
extern void prec_redeclared (void);
extern void polymorphic_entry_point(char *s) Noreturn;
extern void forbidden_conflicts (void);
extern void reader (void);
extern void reflexive_transitive_closure (unsigned int *R, int n);
extern void reprec_warning (char *s);
extern void retyped_warning (char *s);
extern void revalued_warning (char *s);
extern void set_first_derives (void);
extern void syntax_error (int st_lineno, char *st_line, char *st_cptr) Noreturn, terminal_lhs (int s_lineno) Noreturn;
extern void terminal_start (char *s) Noreturn;
extern void tokenized_start (char *s) Noreturn;
extern void too_many_entries (void) Noreturn;
extern void undefined_goal (char *s);
extern void undefined_symbol (char *s);
extern void unexpected_EOF (void) Noreturn;
extern void unknown_rhs (int i) Noreturn;
extern void unterminated_action (int a_lineno, char *a_line, char *a_cptr) Noreturn;
extern void unterminated_comment (int c_lineno, char *c_line, char *c_cptr) Noreturn;
extern void unterminated_string (int s_lineno, char *s_line, char *s_cptr) Noreturn;
extern void unterminated_text (int t_lineno, char *t_line, char *t_cptr) Noreturn;
extern void used_reserved (char *s) Noreturn;
extern void verbose (void);
extern void write_section (char **section);
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