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freebsd-dev/contrib/byacc/defs.h
Dag-Erling Smørgrav 8e022d3cde byacc: Update to 20230201. 
Note that this enables the backtracking extension, which we had previously left disabled.

PR:		244149, 269425
Sponsored by:	Klara, Inc.
Differential Revision:	https://reviews.freebsd.org/D38421
2023-02-20 23:35:32 +01:00

617 lines
15 KiB
C
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/* $Id: defs.h,v 1.71 2022/11/06 21:44:54 tom Exp $ */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <limits.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <assert.h>
#include <ctype.h>
#include <stdio.h>
#if defined(__cplusplus) /* __cplusplus, etc. */
#define class myClass
#endif
#define YYMAJOR 2
#define YYMINOR 0
#define CONCAT(first,second) first #second
#define CONCAT1(string,number) CONCAT(string, number)
#define CONCAT2(first,second) #first "." #second
#ifdef YYPATCH
#define VSTRING(a,b) CONCAT2(a,b) CONCAT1(" ",YYPATCH)
#else
#define VSTRING(a,b) CONCAT2(a,b)
#endif
#define VERSION VSTRING(YYMAJOR, YYMINOR)
/* machine-dependent definitions: */
/* MAXCHAR is the largest unsigned character value */
/* MAXTABLE is the maximum table size */
/* YYINT is the smallest C integer type that can be */
/* used to address a table of size MAXTABLE */
/* MAXYYINT is the largest value of a YYINT */
/* MINYYINT is the most negative value of a YYINT */
/* 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
#ifndef MAXTABLE
#define MAXTABLE INT_MAX
#endif
#if MAXTABLE <= SHRT_MAX
#define YYINT short
#define MAXYYINT SHRT_MAX
#define MINYYINT SHRT_MIN
#elif MAXTABLE <= INT_MAX
#define YYINT int
#define MAXYYINT INT_MAX
#define MINYYINT INT_MIN
#elif MAXTABLE <= LONG_MAX
#define YYINT long
#define MAXYYINT LONG_MAX
#define MINYYINT LONG_MIN
#else
#error "MAXTABLE is too large for this machine architecture!"
#endif
#define BITS_PER_WORD ((int) sizeof (unsigned) * CHAR_BIT)
#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)))&1)
#define SETBIT(r, n) ((r)[(n)/BITS_PER_WORD]|=((unsigned)1<<((n)&(BITS_PER_WORD-1))))
/* 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 */
#define UCH(c) (unsigned char)(c)
/* defines for constructing filenames */
#if defined(VMS)
#define CODE_SUFFIX "_code.c"
#define DEFINES_SUFFIX "_tab.h"
#define EXTERNS_SUFFIX "_tab.i"
#define OUTPUT_SUFFIX "_tab.c"
#else
#define CODE_SUFFIX ".code.c"
#define DEFINES_SUFFIX ".tab.h"
#define EXTERNS_SUFFIX ".tab.i"
#define OUTPUT_SUFFIX ".tab.c"
#endif
#define VERBOSE_SUFFIX ".output"
#define GRAPH_SUFFIX ".dot"
/* keyword codes */
typedef enum
{
TOKEN = 0
,LEFT
,RIGHT
,NONASSOC
,MARK
,TEXT
,TYPE
,START
,UNION
,IDENT
/* trivial bison "extensions" which have POSIX equivalents */
,NONPOSIX_DEBUG
/* other bison "extensions", some useful */
,ERROR_VERBOSE
,EXPECT
,EXPECT_RR
,LEX_PARAM
,PARSE_PARAM
,POSIX_YACC
,PURE_PARSER
,TOKEN_TABLE
,XCODE
#if defined(YYBTYACC)
,DESTRUCTOR
,INITIAL_ACTION
,LOCATIONS
#endif
}
KEY_CASES;
/* symbol classes */
typedef enum
{
UNKNOWN = 0
,TERM
,NONTERM
,ACTION
,ARGUMENT
}
SYM_CASES;
/* the undefined value */
#define UNDEFINED (-1)
/* action codes */
#define SHIFT 1
#define REDUCE 2
/* character macros */
#define IS_NAME1(c) (isalpha(UCH(c)) || (c) == '_' || (c) == '$')
#define IS_NAME2(c) (isalnum(UCH(c)) || (c) == '_' || (c) == '$')
#define IS_IDENT(c) (isalnum(UCH(c)) || (c) == '_' || (c) == '.' || (c) == '$')
#define IS_OCTAL(c) ((c) >= '0' && (c) <= '7')
/* symbol macros */
#define ISTOKEN(s) ((s) < start_symbol)
#define ISVAR(s) ((s) >= start_symbol)
/* storage allocation macros */
#define CALLOC(k,n) (calloc((size_t)(k),(size_t)(n)))
#define FREE(x) (free((char*)(x)))
#define MALLOC(n) (malloc((size_t)(n)))
#define TCMALLOC(t,n) ((t*) calloc((size_t)(n), sizeof(t)))
#define TMALLOC(t,n) ((t*) malloc((size_t)(n) * sizeof(t)))
#define NEW(t) ((t*)allocate(sizeof(t)))
#define NEW2(n,t) ((t*)allocate(((size_t)(n)*sizeof(t))))
#define REALLOC(p,n) (realloc((char*)(p),(size_t)(n)))
#define TREALLOC(t,p,n) ((t*)realloc((char*)(p), (size_t)(n) * sizeof(t)))
#define DO_FREE(x) if (x) { FREE(x); x = 0; }
#define NO_SPACE(p) if (p == 0) no_space(); assert(p != 0)
/* messages */
#define PLURAL(n) ((n) > 1 ? "s" : "")
/*
* Features which depend indirectly on the btyacc configuration, but are not
* essential.
*/
#if defined(YYBTYACC)
#define USE_HEADER_GUARDS 1
#else
#define USE_HEADER_GUARDS 0
#endif
typedef char Assoc_t;
typedef char Class_t;
typedef YYINT Index_t;
typedef YYINT Value_t;
/* the structure of a symbol table entry */
typedef struct bucket bucket;
struct bucket
{
struct bucket *link;
struct bucket *next;
char *name;
char *tag;
#if defined(YYBTYACC)
char **argnames;
char **argtags;
int args;
char *destructor;
#endif
Value_t value;
Index_t index;
Value_t prec;
Class_t class;
Assoc_t assoc;
};
/* the structure of the LR(0) state machine */
typedef struct core core;
struct core
{
struct core *next;
struct core *link;
Value_t number;
Value_t accessing_symbol;
Value_t nitems;
Value_t items[1];
};
/* the structure used to record shifts */
typedef struct shifts shifts;
struct shifts
{
struct shifts *next;
Value_t number;
Value_t nshifts;
Value_t shift[1];
};
/* the structure used to store reductions */
typedef struct reductions reductions;
struct reductions
{
struct reductions *next;
Value_t number;
Value_t nreds;
Value_t rules[1];
};
/* the structure used to represent parser actions */
typedef struct action action;
struct action
{
struct action *next;
Value_t symbol;
Value_t number;
Value_t prec;
char action_code;
Assoc_t assoc;
char suppressed;
};
/* the structure used to store parse/lex parameters */
typedef struct param param;
struct param
{
struct param *next;
char *name; /* parameter name */
char *type; /* everything before parameter name */
char *type2; /* everything after parameter name */
};
/* global variables */
extern char dflag2;
extern char dflag;
extern char gflag;
extern char iflag;
extern char lflag;
extern char rflag;
extern char sflag;
extern char tflag;
extern char vflag;
extern const char *symbol_prefix;
extern const char *myname;
extern char *cptr;
extern char *line;
extern int lineno;
extern int outline;
extern int exit_code;
extern int pure_parser;
extern int token_table;
extern int error_verbose;
#if defined(YYBTYACC)
extern int locations;
extern int backtrack;
extern int destructor;
extern char *initial_action;
#endif
extern const char *const banner[];
extern const char *const xdecls[];
extern const char *const tables[];
extern const char *const global_vars[];
extern const char *const impure_vars[];
extern const char *const hdr_defs[];
extern const char *const hdr_vars[];
extern const char *const body_1[];
extern const char *const body_vars[];
extern const char *const init_vars[];
extern const char *const body_2[];
extern const char *const body_3[];
extern const char *const trailer[];
extern char *code_file_name;
extern char *input_file_name;
extern size_t input_file_name_len;
extern char *defines_file_name;
extern char *externs_file_name;
extern FILE *action_file;
extern FILE *code_file;
extern FILE *defines_file;
extern FILE *externs_file;
extern FILE *input_file;
extern FILE *output_file;
extern FILE *text_file;
extern FILE *union_file;
extern FILE *verbose_file;
extern FILE *graph_file;
extern Value_t nitems;
extern Value_t nrules;
extern Value_t nsyms;
extern Value_t ntokens;
extern Value_t nvars;
extern int ntags;
extern char unionized;
extern char line_format[];
#define fprintf_lineno(f, n, s) \
if (!lflag) \
fprintf(f, line_format, (n), (s) ? (s) : "(null)")
extern Value_t start_symbol;
extern char **symbol_name;
extern char **symbol_pname;
extern Value_t *symbol_value;
extern Value_t *symbol_prec;
extern char *symbol_assoc;
#if defined(YYBTYACC)
extern Value_t *symbol_pval;
extern char **symbol_destructor;
extern char **symbol_type_tag;
#endif
extern Value_t *ritem;
extern Value_t *rlhs;
extern Value_t *rrhs;
extern Value_t *rprec;
extern Assoc_t *rassoc;
extern Value_t **derives;
extern char *nullable;
extern bucket *first_symbol;
extern bucket *last_symbol;
extern Value_t nstates;
extern core *first_state;
extern shifts *first_shift;
extern reductions *first_reduction;
extern Value_t *accessing_symbol;
extern core **state_table;
extern shifts **shift_table;
extern reductions **reduction_table;
extern unsigned *LA;
extern Value_t *LAruleno;
extern Value_t *lookaheads;
extern Value_t *goto_base;
extern Value_t *goto_map;
extern Value_t *from_state;
extern Value_t *to_state;
extern action **parser;
extern int SRexpect;
extern int RRexpect;
extern int SRtotal;
extern int RRtotal;
extern Value_t *SRconflicts;
extern Value_t *RRconflicts;
extern Value_t *defred;
extern Value_t *rules_used;
extern Value_t nunused;
extern Value_t final_state;
extern Value_t *itemset;
extern Value_t *itemsetend;
extern unsigned *ruleset;
extern param *lex_param;
extern param *parse_param;
/* global functions */
#ifdef HAVE_STDNORETURN_H
#undef GCC_NORETURN
#include <stdnoreturn.h>
#define GCC_NORETURN _Noreturn
#endif
#ifndef GCC_NORETURN
#if defined(_MSC_VER)
#define GCC_NORETURN __declspec(noreturn)
#else
#define GCC_NORETURN /* nothing */
#endif
#endif
#if defined(NDEBUG) && defined(_MSC_VER)
#define NODEFAULT __assume(0);
#else
#define NODEFAULT
#endif
#define NOTREACHED NODEFAULT
#ifndef GCC_UNUSED
#if defined(__unused)
#define GCC_UNUSED __unused
#else
#define GCC_UNUSED /* nothing */
#endif
#endif
#ifndef GCC_PRINTFLIKE
#define GCC_PRINTFLIKE(fmt,var) /*nothing */
#endif
/* closure.c */
extern void closure(Value_t *nucleus, int n);
extern void finalize_closure(void);
extern void set_first_derives(void);
/* error.c */
struct ainfo
{
int a_lineno;
char *a_line;
char *a_cptr;
};
extern void arg_number_disagree_warning(int a_lineno, char *a_name);
extern void arg_type_disagree_warning(int a_lineno, int i, char *a_name);
extern GCC_NORETURN void at_error(int a_lineno, char *a_line, char *a_cptr);
extern void at_warning(int a_lineno, int i);
extern GCC_NORETURN void bad_formals(void);
extern void default_action_warning(char *s);
extern void destructor_redeclared_warning(const struct ainfo *);
extern GCC_NORETURN void dollar_error(int a_lineno, char *a_line, char *a_cptr);
extern void dollar_warning(int a_lineno, int i);
extern GCC_NORETURN void fatal(const char *msg);
extern GCC_NORETURN void illegal_character(char *c_cptr);
extern GCC_NORETURN void illegal_tag(int t_lineno, char *t_line, char *t_cptr);
extern GCC_NORETURN void missing_brace(void);
extern GCC_NORETURN void no_grammar(void);
extern GCC_NORETURN void no_space(void);
extern GCC_NORETURN void open_error(const char *filename);
extern GCC_NORETURN void over_unionized(char *u_cptr);
extern void prec_redeclared(void);
extern void reprec_warning(char *s);
extern void restarted_warning(void);
extern void retyped_warning(char *s);
extern void revalued_warning(char *s);
extern void start_requires_args(char *a_name);
extern GCC_NORETURN void syntax_error(int st_lineno, char *st_line, char *st_cptr);
extern GCC_NORETURN void terminal_lhs(int s_lineno);
extern GCC_NORETURN void terminal_start(char *s);
extern GCC_NORETURN void tokenized_start(char *s);
extern GCC_NORETURN void undefined_goal(char *s);
extern void undefined_symbol_warning(char *s);
extern GCC_NORETURN void unexpected_EOF(void);
extern void unknown_arg_warning(int d_lineno, const char *dlr_opt,
const char *d_arg, const char *d_line,
const char *d_cptr);
extern GCC_NORETURN void unknown_rhs(int i);
extern void unsupported_flag_warning(const char *flag, const char *details);
extern GCC_NORETURN void unterminated_action(const struct ainfo *);
extern GCC_NORETURN void unterminated_comment(const struct ainfo *);
extern GCC_NORETURN void unterminated_string(const struct ainfo *);
extern GCC_NORETURN void unterminated_text(const struct ainfo *);
extern GCC_NORETURN void unterminated_union(const struct ainfo *);
extern void untyped_arg_warning(int a_lineno, const char *dlr_opt, const char *a_name);
extern GCC_NORETURN void untyped_lhs(void);
extern GCC_NORETURN void untyped_rhs(int i, char *s);
extern GCC_NORETURN void used_reserved(char *s);
extern GCC_NORETURN void unterminated_arglist(const struct ainfo *);
extern void wrong_number_args_warning(const char *which, const char *a_name);
extern void wrong_type_for_arg_warning(int i, char *a_name);
/* graph.c */
extern void graph(void);
/* lalr.c */
extern void lalr(void);
/* lr0.c */
extern void lr0(void);
extern void show_cores(void);
extern void show_ritems(void);
extern void show_rrhs(void);
extern void show_shifts(void);
/* main.c */
extern void *allocate(size_t n);
extern GCC_NORETURN void done(int k);
/* mkpar.c */
extern void free_parser(void);
extern void make_parser(void);
/* mstring.c */
struct mstring
{
char *base, *ptr, *end;
};
extern void msprintf(struct mstring *, const char *, ...) GCC_PRINTFLIKE(2,3);
extern int mputchar(struct mstring *, int);
extern struct mstring *msnew(void);
extern struct mstring *msrenew(char *);
extern char *msdone(struct mstring *);
extern int strnscmp(const char *, const char *);
extern unsigned int strnshash(const char *);
#define mputc(m, ch) (((m)->ptr == (m)->end) \
? mputchar(m,ch) \
: (*(m)->ptr++ = (char) (ch)))
/* output.c */
extern void output(void);
/* reader.c */
extern void reader(void);
typedef enum
{
CODE_HEADER = 0
,CODE_REQUIRES
,CODE_PROVIDES
,CODE_TOP
,CODE_IMPORTS
,CODE_MAX /* this must be last */
}
CODE_CASES;
extern struct code_lines
{
const char *name;
char *lines;
size_t num;
}
code_lines[CODE_MAX];
/* skeleton.c (generated by skel2c) */
extern void write_section(FILE * fp, const char *const section[]);
/* symtab.c */
extern bucket *make_bucket(const char *);
extern bucket *lookup(const char *);
extern void create_symbol_table(void);
extern void free_symbol_table(void);
extern void free_symbols(void);
/* verbose.c */
extern void verbose(void);
/* warshall.c */
extern void reflexive_transitive_closure(unsigned *R, int n);
#ifdef DEBUG
/* closure.c */
extern void print_closure(int n);
extern void print_EFF(void);
extern void print_first_derives(void);
/* lr0.c */
extern void print_derives(void);
#endif
#ifdef NO_LEAKS
extern void lr0_leaks(void);
extern void lalr_leaks(void);
extern void mkpar_leaks(void);
extern void output_leaks(void);
extern void mstring_leaks(void);
extern void reader_leaks(void);
#endif
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