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688bdd6550
freebsd-skq/usr.bin/yacc/defs.h
cperciva 45f0d08992 Mark functions as __dead2 in order to help the LLVM static checker 
understand which code paths aren't possible.

This commit eliminates 117 false positive bug reports of the form
"allocate memory; error out if pointer is NULL; use pointer".
2008-08-04 01:25:48 +00:00

358 lines
9.0 KiB
C
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/*
* Copyright (c) 1989 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Robert Paul Corbett.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* @(#)defs.h 5.6 (Berkeley) 5/24/93
* $FreeBSD$
*/
#include <assert.h>
#include <ctype.h>
#include <err.h>
#include <stdio.h>
/* machine-dependent definitions */
/* the following definitions are for the Tahoe */
/* they might have to be changed for other machines */
/* 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 MAXTABLE 32500
#define BITS_PER_WORD 32
#define WORDSIZE(n) (((n)+(BITS_PER_WORD-1))/BITS_PER_WORD)
#define BIT(r, n) ((((r)[(n)>>5])>>((n)&31))&1)
#define SETBIT(r, n) ((r)[(n)>>5]|=((unsigned)1<<((n)&31)))
/* 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 CODE_SUFFIX ".code.c"
#define DEFINES_SUFFIX ".tab.h"
#define OUTPUT_SUFFIX ".tab.c"
#define VERBOSE_SUFFIX ".output"
/* 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
#define UNION 8
#define IDENT 9
#define EXPECT 10
/* 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;
};
/* 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 dflag;
extern char lflag;
extern char rflag;
extern char tflag;
extern char vflag;
extern const char *symbol_prefix;
extern char *myname;
extern char *cptr;
extern char *line;
extern int lineno;
extern int outline;
extern const char *banner[];
extern const char *tables[];
extern const char *header[];
extern const char *body[];
extern const char *trailer[];
extern char *action_file_name;
extern char *code_file_name;
extern char *defines_file_name;
extern const char *input_file_name;
extern char *output_file_name;
extern char *text_file_name;
extern char *union_file_name;
extern char *verbose_file_name;
extern FILE *action_file;
extern FILE *code_file;
extern FILE *defines_file;
extern FILE *input_file;
extern FILE *output_file;
extern FILE *text_file;
extern FILE *union_file;
extern FILE *verbose_file;
extern int nitems;
extern int nrules;
extern int nsyms;
extern int ntokens;
extern int nvars;
extern int ntags;
extern char unionized;
extern int start_symbol;
extern char **symbol_name;
extern short *symbol_value;
extern short *symbol_prec;
extern char *symbol_assoc;
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 SRexpect;
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 */
char *allocate(unsigned);
void closure(short *, int);
void create_symbol_table(void);
void default_action_warning(void);
void dollar_error(int, char *, char *) __dead2;
void dollar_warning(int, int);
void done(int) __dead2;
void fatal(const char *msg) __dead2;
void finalize_closure(void);
void free_parser(void);
void free_symbols(void);
void free_symbol_table(void);
void illegal_character(char *) __dead2;
void illegal_tag(int, char *, char *) __dead2;
void lalr(void);
bucket *lookup(char *);
void lr0(void);
bucket *make_bucket(const char *);
void make_parser(void);
void no_grammar(void) __dead2;
void no_space(void) __dead2;
void open_error(const char *) __dead2;
void output(void);
void over_unionized(char *) __dead2;
void prec_redeclared(void);
void reader(void);
void reflexive_transitive_closure(unsigned *, int);
void reprec_warning(char *);
void restarted_warning(void);
void retyped_warning(char *);
void revalued_warning(char *);
void set_first_derives(void);
void syntax_error(int, char *, char *) __dead2;
void terminal_lhs(int) __dead2;
void terminal_start(char *) __dead2;
void tokenized_start(char *) __dead2;
void undefined_goal(char *) __dead2;
void undefined_symbol_warning(char *);
void unexpected_EOF(void) __dead2;
void unknown_rhs(int) __dead2;
void unterminated_action(int, char *, char *) __dead2;
void unterminated_comment(int, char *, char *) __dead2;
void unterminated_string(int, char *, char *) __dead2;
void unterminated_text(int, char *, char *) __dead2;
void unterminated_union(int, char *, char *) __dead2;
void untyped_lhs(void) __dead2;
void untyped_rhs(int, char *) __dead2;
void used_reserved(char *) __dead2;
void verbose(void);
void write_section(const char **);
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