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freebsd-dev/contrib/awk/awk.h
Sheldon Hearn 3c28a656f2 Merge the vendor release of gawk-3.0.6 onto HEAD. 
This addresses one known problem in the PR database.

PR:		13921
Reported by:	Jin Guojun <j_guojun@lbl.gov>
2000-08-15 10:20:01 +00:00

907 lines
26 KiB
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/*
* awk.h -- Definitions for gawk.
*/
/*
* Copyright (C) 1986, 1988, 1989, 1991-2000 the Free Software Foundation, Inc.
*
* This file is part of GAWK, the GNU implementation of the
* AWK Programming Language.
*
* GAWK is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* GAWK is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
*
* $FreeBSD$
*/
/* ------------------------------ Includes ------------------------------ */
/*
* config.h absolutely, positively, *M*U*S*T* be included before
* any system headers. Otherwise, extreme death, destruction
* and loss of life results.
*
* Well, OK, gawk just won't work on systems using egcs and LFS. But
* that's almost as bad.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#ifndef _GNU_SOURCE
#define _GNU_SOURCE 1 /* enable GNU extensions */
#endif /* _GNU_SOURCE */
#include <stdio.h>
#include <assert.h>
#ifdef HAVE_LIMITS_H
#include <limits.h>
#endif /* HAVE_LIMITS_H */
#include <ctype.h>
#include <setjmp.h>
#ifdef HAVE_LOCALE_H
#include <locale.h>
#endif /* HAVE_LOCALE_H */
#if defined(HAVE_STDARG_H) && defined(__STDC__) && __STDC__
#include <stdarg.h>
#else
#include <varargs.h>
#endif
#include <signal.h>
#include <time.h>
#include <errno.h>
#if ! defined(errno) && ! defined(MSDOS) && ! defined(OS2)
extern int errno;
#endif
#ifdef HAVE_SIGNUM_H
#include <signum.h>
#endif
/* ----------------- System dependencies (with more includes) -----------*/
/* This section is the messiest one in the file, not a lot that can be done */
/* First, get the ctype stuff right; from Jim Meyering */
#if defined(STDC_HEADERS) || (!defined(isascii) && !defined(HAVE_ISASCII))
#define ISASCII(c) 1
#else
#define ISASCII(c) isascii(c)
#endif
#ifdef isblank
#define ISBLANK(c) (ISASCII(c) && isblank(c))
#else
#define ISBLANK(c) ((c) == ' ' || (c) == '\t')
#endif
#ifdef isgraph
#define ISGRAPH(c) (ISASCII(c) && isgraph(c))
#else
#define ISGRAPH(c) (ISASCII(c) && isprint(c) && !isspace(c))
#endif
#define ISPRINT(c) (ISASCII (c) && isprint (c))
#define ISDIGIT(c) (ISASCII (c) && isdigit (c))
#define ISALNUM(c) (ISASCII (c) && isalnum (c))
#define ISALPHA(c) (ISASCII (c) && isalpha (c))
#define ISCNTRL(c) (ISASCII (c) && iscntrl (c))
#define ISLOWER(c) (ISASCII (c) && islower (c))
#define ISPUNCT(c) (ISASCII (c) && ispunct (c))
#define ISSPACE(c) (ISASCII (c) && isspace (c))
#define ISUPPER(c) (ISASCII (c) && isupper (c))
#define ISXDIGIT(c) (ISASCII (c) && isxdigit (c))
#ifdef __STDC__
#define P(s) s
#define MALLOC_ARG_T size_t
#else /* not __STDC__ */
#define P(s) ()
#define MALLOC_ARG_T unsigned
#define volatile
#define const
#endif /* not __STDC__ */
#if ! defined(VMS) || (! defined(VAXC) && ! defined(__DECC))
#include <sys/types.h>
#include <sys/stat.h>
#else /* VMS w/ VAXC or DECC */
#include <types.h>
#include <stat.h>
#include <file.h> /* avoid <fcntl.h> in io.c */
#ifdef __DECC
/* DEC C implies DECC$SHR, which doesn't have the %g problem of VAXCRTL */
#undef GFMT_WORKAROUND
#endif
#endif /* VMS w/ VAXC or DECC */
#ifdef STDC_HEADERS
#include <stdlib.h>
#else /* not STDC_HEADERS */
#include "protos.h"
#endif /* not STDC_HEADERS */
#ifdef HAVE_STRING_H
#include <string.h>
#ifdef NEED_MEMORY_H
#include <memory.h>
#endif /* NEED_MEMORY_H */
#else /* not HAVE_STRING_H */
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif /* HAVE_STRINGS_H */
#endif /* not HAVE_STRING_H */
#ifdef NeXT
#if __GNUC__ < 2 || __GNUC_MINOR__ < 7
#include <libc.h>
#endif
#undef atof
#define getopt GNU_getopt
#define GFMT_WORKAROUND
#endif /* NeXT */
#if defined(atarist) || defined(VMS)
#include <unixlib.h>
#endif /* atarist || VMS */
#if HAVE_UNISTD_H
#include <unistd.h>
#endif /* HAVE_UNISTD_H */
#ifndef HAVE_VPRINTF
/* if you don't have vprintf, try this and cross your fingers. */
#ifdef HAVE_DOPRNT
#define vfprintf(fp,fmt,arg) _doprnt((fmt), (arg), (fp))
#else /* not HAVE_DOPRNT */
you
lose
#endif /* not HAVE_DOPRNT */
#endif /* HAVE_VPRINTF */
#ifndef HAVE_SETLOCALE
#define setlocale(locale, val) /* nothing */
#endif /* HAVE_SETLOCALE */
#ifdef VMS
#include "vms/redirect.h"
#endif /*VMS*/
#ifdef atarist
#include "atari/redirect.h"
#endif
#define GNU_REGEX
#ifdef GNU_REGEX
#ifdef __FreeBSD__
#include <gnuregex.h>
#else
#include "regex.h"
#endif
#include "dfa.h"
typedef struct Regexp {
struct re_pattern_buffer pat;
struct re_registers regs;
struct dfa dfareg;
int dfa;
} Regexp;
#define RESTART(rp,s) (rp)->regs.start[0]
#define REEND(rp,s) (rp)->regs.end[0]
#define SUBPATSTART(rp,s,n) (rp)->regs.start[n]
#define SUBPATEND(rp,s,n) (rp)->regs.end[n]
#endif /* GNU_REGEX */
/* ------------------ Constants, Structures, Typedefs ------------------ */
#ifndef AWKNUM
#define AWKNUM double
#endif
#ifndef TRUE
/* a bit hackneyed, but what the heck */
#define TRUE 1
#define FALSE 0
#endif
/* Figure out what '\a' really is. */
#ifdef __STDC__
#define BELL '\a' /* sure makes life easy, don't it? */
#else
# if 'z' - 'a' == 25 /* ascii */
# if 'a' != 97 /* machine is dumb enough to use mark parity */
# define BELL '\207'
# else
# define BELL '\07'
# endif
# else
# define BELL '\057'
# endif
#endif
typedef enum nodevals {
/* illegal entry == 0 */
Node_illegal,
/* binary operators lnode and rnode are the expressions to work on */
Node_times,
Node_quotient,
Node_mod,
Node_plus,
Node_minus,
Node_cond_pair, /* conditional pair (see Node_line_range) */
Node_subscript,
Node_concat,
Node_exp,
/* unary operators subnode is the expression to work on */
Node_preincrement,
Node_predecrement,
Node_postincrement,
Node_postdecrement,
Node_unary_minus,
Node_field_spec,
/* assignments lnode is the var to assign to, rnode is the exp */
Node_assign,
Node_assign_times,
Node_assign_quotient,
Node_assign_mod,
Node_assign_plus,
Node_assign_minus,
Node_assign_exp,
/* boolean binaries lnode and rnode are expressions */
Node_and,
Node_or,
/* binary relationals compares lnode and rnode */
Node_equal,
Node_notequal,
Node_less,
Node_greater,
Node_leq,
Node_geq,
Node_match,
Node_nomatch,
/* unary relationals works on subnode */
Node_not,
/* program structures */
Node_rule_list, /* lnode is a rule, rnode is rest of list */
Node_rule_node, /* lnode is pattern, rnode is statement */
Node_statement_list, /* lnode is statement, rnode is more list */
Node_if_branches, /* lnode is to run on true, rnode on false */
Node_expression_list, /* lnode is an exp, rnode is more list */
Node_param_list, /* lnode is a variable, rnode is more list */
/* keywords */
Node_K_if, /* lnode is conditonal, rnode is if_branches */
Node_K_while, /* lnode is condtional, rnode is stuff to run */
Node_K_for, /* lnode is for_struct, rnode is stuff to run */
Node_K_arrayfor, /* lnode is for_struct, rnode is stuff to run */
Node_K_break, /* no subs */
Node_K_continue, /* no subs */
Node_K_print, /* lnode is exp_list, rnode is redirect */
Node_K_printf, /* lnode is exp_list, rnode is redirect */
Node_K_next, /* no subs */
Node_K_exit, /* subnode is return value, or NULL */
Node_K_do, /* lnode is conditional, rnode stuff to run */
Node_K_return, /* lnode is return value */
Node_K_delete, /* lnode is array, rnode is subscript */
Node_K_delete_loop, /* lnode is array, rnode is subscript */
Node_K_getline, /* lnode is opt var, rnode is redirection */
Node_K_function, /* lnode is statement list, rnode is params */
Node_K_nextfile, /* no subs */
/* I/O redirection for print statements */
Node_redirect_output, /* subnode is where to redirect */
Node_redirect_append, /* subnode is where to redirect */
Node_redirect_pipe, /* subnode is where to redirect */
Node_redirect_pipein, /* subnode is where to redirect */
Node_redirect_input, /* subnode is where to redirect */
/* Variables */
Node_var, /* rnode is value, lnode is array stuff */
Node_var_array, /* array is ptr to elements, asize num of eles */
Node_val, /* node is a value - type in flags */
/* Builtins subnode is explist to work on, proc is func to call */
Node_builtin,
/*
* pattern: conditional ',' conditional ; lnode of Node_line_range
* is the two conditionals (Node_cond_pair), other word (rnode place)
* is a flag indicating whether or not this range has been entered.
*/
Node_line_range,
/*
* boolean test of membership in array lnode is string-valued
* expression rnode is array name
*/
Node_in_array,
Node_func, /* lnode is param. list, rnode is body */
Node_func_call, /* lnode is name, rnode is argument list */
Node_cond_exp, /* lnode is conditonal, rnode is if_branches */
Node_regex, /* a regexp, text, compiled, flags, etc */
Node_hashnode, /* an identifier in the symbol table */
Node_ahash, /* an array element */
Node_array_ref, /* array passed by ref as parameter */
Node_NF, /* variables recognized in the grammar */
Node_NR,
Node_FNR,
Node_FS,
Node_RS,
Node_FIELDWIDTHS,
Node_IGNORECASE,
Node_OFS,
Node_ORS,
Node_OFMT,
Node_CONVFMT,
Node_final /* sentry value, not legal */
} NODETYPE;
/*
* NOTE - this struct is a rather kludgey -- it is packed to minimize
* space usage, at the expense of cleanliness. Alter at own risk.
*/
typedef struct exp_node {
union {
struct {
union {
struct exp_node *lptr;
char *param_name;
long ll;
} l;
union {
struct exp_node *rptr;
struct exp_node *(*pptr)();
Regexp *preg;
struct for_loop_header *hd;
struct exp_node **av;
int r_ent; /* range entered */
} r;
union {
struct exp_node *extra;
long xl;
} x;
char *name;
short number;
unsigned char reflags;
# define CASE 1
# define CONST 2
# define FS_DFLT 4
} nodep;
struct {
AWKNUM fltnum; /* this is here for optimal packing of
* the structure on many machines
*/
char *sp;
size_t slen;
long sref;
int idx;
} val;
struct {
struct exp_node *next;
char *name;
size_t length;
struct exp_node *value;
} hash;
#define hnext sub.hash.next
#define hname sub.hash.name
#define hlength sub.hash.length
#define hvalue sub.hash.value
struct {
struct exp_node *next;
struct exp_node *name;
struct exp_node *value;
} ahash;
#define ahnext sub.ahash.next
#define ahname sub.ahash.name
#define ahvalue sub.ahash.value
} sub;
NODETYPE type;
unsigned short flags;
# define MALLOC 1 /* can be free'd */
# define TEMP 2 /* should be free'd */
# define PERM 4 /* can't be free'd */
# define STRING 8 /* assigned as string */
# define STR 16 /* string value is current */
# define NUM 32 /* numeric value is current */
# define NUMBER 64 /* assigned as number */
# define MAYBE_NUM 128 /* user input: if NUMERIC then
* a NUMBER */
# define ARRAYMAXED 256 /* array is at max size */
# define SCALAR 512 /* used as scalar, can't be array */
# define FUNC 1024 /* this parameter is really a
* function name; see awk.y */
# define FIELD 2048 /* this is a field */
char *vname; /* variable's name */
} NODE;
#define lnode sub.nodep.l.lptr
#define nextp sub.nodep.l.lptr
#define rnode sub.nodep.r.rptr
#define source_file sub.nodep.name
#define source_line sub.nodep.number
#define param_cnt sub.nodep.number
#define param sub.nodep.l.param_name
#define subnode lnode
#define proc sub.nodep.r.pptr
#define re_reg sub.nodep.r.preg
#define re_flags sub.nodep.reflags
#define re_text lnode
#define re_exp sub.nodep.x.extra
#define re_cnt sub.nodep.number
#define forsub lnode
#define forloop rnode->sub.nodep.r.hd
#define stptr sub.val.sp
#define stlen sub.val.slen
#define stref sub.val.sref
#define stfmt sub.val.idx
#define numbr sub.val.fltnum
#define var_value lnode
#define var_array sub.nodep.r.av
#define array_size sub.nodep.l.ll
#define table_size sub.nodep.x.xl
#define orig_array sub.nodep.x.extra
#define condpair lnode
#define triggered sub.nodep.r.r_ent
/* a regular for loop */
typedef struct for_loop_header {
NODE *init;
NODE *cond;
NODE *incr;
} FOR_LOOP_HEADER;
/* for "for(iggy in foo) {" */
struct search {
NODE *sym;
size_t idx;
NODE *bucket;
NODE *retval;
};
/* for faster input, bypass stdio */
typedef struct iobuf {
const char *name;
int fd;
char *buf;
char *off;
char *end;
size_t size; /* this will be determined by an fstat() call */
int cnt;
long secsiz;
int flag;
# define IOP_IS_TTY 1
# define IOP_IS_INTERNAL 2
# define IOP_NO_FREE 4
# define IOP_MMAPPED 8
# define IOP_NOFREE_OBJ 16
int (*getrec)();
} IOBUF;
typedef void (*Func_ptr)();
/* structure used to dynamically maintain a linked-list of open files/pipes */
struct redirect {
unsigned int flag;
# define RED_FILE 1
# define RED_PIPE 2
# define RED_READ 4
# define RED_WRITE 8
# define RED_APPEND 16
# define RED_NOBUF 32
# define RED_USED 64 /* closed temporarily to reuse fd */
# define RED_EOF 128
char *value;
FILE *fp;
FILE *ifp; /* input fp, needed for PIPES_SIMULATED */
IOBUF *iop;
int pid;
int status;
struct redirect *prev;
struct redirect *next;
};
/* structure for our source, either a command line string or a source file */
struct src {
enum srctype { CMDLINE = 1, SOURCEFILE } stype;
char *val;
};
/* longjmp return codes, must be nonzero */
/* Continue means either for loop/while continue, or next input record */
#define TAG_CONTINUE 1
/* Break means either for/while break, or stop reading input */
#define TAG_BREAK 2
/* Return means return from a function call; leave value in ret_node */
#define TAG_RETURN 3
#ifndef LONG_MAX
#define LONG_MAX ((long)(~(1L << (sizeof (long) * 8 - 1))))
#endif
#ifndef ULONG_MAX
#define ULONG_MAX (~(unsigned long)0)
#endif
#ifndef LONG_MIN
#define LONG_MIN ((long)(-LONG_MAX - 1L))
#endif
#define HUGE LONG_MAX
/* -------------------------- External variables -------------------------- */
/* gawk builtin variables */
extern long NF;
extern long NR;
extern long FNR;
extern int IGNORECASE;
extern int RS_is_null;
extern char *OFS;
extern int OFSlen;
extern char *ORS;
extern int ORSlen;
extern char *OFMT;
extern char *CONVFMT;
extern int CONVFMTidx;
extern int OFMTidx;
extern NODE *CONVFMT_node, *FIELDWIDTHS_node, *FILENAME_node;
extern NODE *FNR_node, *FS_node, *IGNORECASE_node, *NF_node;
extern NODE *NR_node, *OFMT_node, *OFS_node, *ORS_node, *RLENGTH_node;
extern NODE *RSTART_node, *RS_node, *RT_node, *SUBSEP_node;
extern NODE **stack_ptr;
extern NODE *Nnull_string;
extern NODE **fields_arr;
extern int sourceline;
extern char *source;
extern NODE *expression_value;
#if __GNUC__ < 2
extern NODE *_t; /* used as temporary in tree_eval */
#endif
extern NODE *nextfree;
extern int field0_valid;
extern int do_traditional;
extern int do_posix;
extern int do_lint;
extern int do_lint_old;
extern int do_intervals;
extern int in_begin_rule;
extern int in_end_rule;
extern const char *myname;
extern char quote;
extern char *defpath;
extern char envsep;
extern char casetable[]; /* for case-independent regexp matching */
/* ------------------------- Pseudo-functions ------------------------- */
#define is_identchar(c) (isalnum(c) || (c) == '_')
#define isnondecimal(str) (((str)[0]) == '0' && (ISDIGIT((str)[1]) \
|| (str)[1] == 'x' || (str)[1] == 'X'))
#ifdef MPROF
#define getnode(n) emalloc(n, NODE *, sizeof(NODE), "getnode")
#define freenode(n) free(n)
#else /* not MPROF */
#define getnode(n) if (nextfree) n = nextfree, nextfree = nextfree->nextp;\
else n = more_nodes()
#define freenode(n) ((n)->flags &= ~SCALAR, (n)->nextp = nextfree, nextfree = (n))
#endif /* not MPROF */
#ifdef DEBUG
#undef freenode
#define get_lhs(p, a) r_get_lhs((p), (a))
#define m_tree_eval(t, iscond) r_tree_eval(t, iscond)
#else
#define get_lhs(p, a) ((p)->type == Node_var ? (&(p)->var_value) : \
r_get_lhs((p), (a)))
#if __GNUC__ >= 2
#define m_tree_eval(t, iscond) \
({NODE * _t = (t); \
if (_t == NULL) \
_t = Nnull_string; \
else { \
switch(_t->type) { \
case Node_val: \
break; \
case Node_var: \
_t = _t->var_value; \
break; \
default: \
_t = r_tree_eval(_t, iscond);\
break; \
} \
} \
_t;})
#else
#define m_tree_eval(t, iscond) (_t = (t), _t == NULL ? Nnull_string : \
(_t->type == Node_param_list ? \
r_tree_eval(_t, iscond) : \
(_t->type == Node_val ? _t : \
(_t->type == Node_var ? _t->var_value : \
r_tree_eval(_t, iscond)))))
#endif /* __GNUC__ */
#endif /* not DEBUG */
#define tree_eval(t) m_tree_eval(t, FALSE)
#define make_number(x) mk_number((x), (unsigned int)(MALLOC|NUM|NUMBER))
#define tmp_number(x) mk_number((x), (unsigned int)(MALLOC|TEMP|NUM|NUMBER))
#define free_temp(n) do { if ((n)->flags&TEMP) { unref(n); }} while (FALSE)
#define make_string(s, l) make_str_node((s), (size_t) (l), FALSE)
#define SCAN 1
#define ALREADY_MALLOCED 2
#define cant_happen() r_fatal("internal error line %d, file: %s", \
__LINE__, __FILE__);
#ifdef HAVE_STRINGIZE
#define emalloc(var,ty,x,str) (void)((var=(ty)malloc((MALLOC_ARG_T)(x))) ||\
(fatal("%s: %s: can't allocate memory (%s)",\
(str), #var, strerror(errno)),0))
#define erealloc(var,ty,x,str) (void)((var=(ty)realloc((char *)var,\
(MALLOC_ARG_T)(x))) ||\
(fatal("%s: %s: can't allocate memory (%s)",\
(str), #var, strerror(errno)),0))
#else /* HAVE_STRINGIZE */
#define emalloc(var,ty,x,str) (void)((var=(ty)malloc((MALLOC_ARG_T)(x))) ||\
(fatal("%s: %s: can't allocate memory (%s)",\
(str), "var", strerror(errno)),0))
#define erealloc(var,ty,x,str) (void)((var=(ty)realloc((char *)var,\
(MALLOC_ARG_T)(x))) ||\
(fatal("%s: %s: can't allocate memory (%s)",\
(str), "var", strerror(errno)),0))
#endif /* HAVE_STRINGIZE */
#ifdef DEBUG
#define force_number r_force_number
#define force_string r_force_string
#else /* not DEBUG */
#ifdef lint
extern AWKNUM force_number();
#endif
#if __GNUC__ >= 2
#define force_number(n) ({NODE *_tn = (n);\
(_tn->flags & NUM) ?_tn->numbr : r_force_number(_tn);})
#define force_string(s) ({NODE *_ts = (s);\
((_ts->flags & STR) && \
(_ts->stfmt == -1 || _ts->stfmt == CONVFMTidx)) ?\
_ts : r_force_string(_ts);})
#else
#ifdef MSDOS
extern double _msc51bug;
#define force_number(n) (_msc51bug=(_t = (n),\
(_t->flags & NUM) ? _t->numbr : r_force_number(_t)))
#else /* not MSDOS */
#define force_number(n) (_t = (n),\
(_t->flags & NUM) ? _t->numbr : r_force_number(_t))
#endif /* not MSDOS */
#define force_string(s) (_t = (s),((_t->flags & STR) && \
(_t->stfmt == -1 || \
_t->stfmt == CONVFMTidx))? \
_t : r_force_string(_t))
#endif /* not __GNUC__ */
#endif /* not DEBUG */
#define STREQ(a,b) (*(a) == *(b) && strcmp((a), (b)) == 0)
#define STREQN(a,b,n) ((n) && *(a)== *(b) && \
strncmp((a), (b), (size_t) (n)) == 0)
#define fatal set_loc(__FILE__, __LINE__), r_fatal
/* ------------- Function prototypes or defs (as appropriate) ------------- */
/* array.c */
extern NODE *concat_exp P((NODE *tree));
extern void assoc_clear P((NODE *symbol));
extern unsigned int hash P((const char *s, size_t len, unsigned long hsize));
extern int in_array P((NODE *symbol, NODE *subs));
extern NODE **assoc_lookup P((NODE *symbol, NODE *subs));
extern void do_delete P((NODE *symbol, NODE *tree));
extern void do_delete_loop P((NODE *symbol, NODE *tree));
extern void assoc_scan P((NODE *symbol, struct search *lookat));
extern void assoc_next P((struct search *lookat));
extern NODE *assoc_dump P((NODE *symbol));
extern NODE *do_adump P((NODE *tree));
/* awktab.c */
extern char *tokexpand P((void));
extern NODE *node P((NODE *left, NODETYPE op, NODE *right));
extern NODE *install P((char *name, NODE *value));
extern NODE *lookup P((const char *name));
extern NODE *variable P((char *name, int can_free, NODETYPE type));
extern int yyparse P((void));
extern NODE *stopme P((NODE *tree));
/* builtin.c */
extern double double_to_int P((double d));
extern NODE *do_exp P((NODE *tree));
extern NODE *do_fflush P((NODE *tree));
extern NODE *do_index P((NODE *tree));
extern NODE *do_int P((NODE *tree));
extern NODE *do_length P((NODE *tree));
extern NODE *do_log P((NODE *tree));
extern NODE *do_sprintf P((NODE *tree));
extern void do_printf P((NODE *tree));
extern void print_simple P((NODE *tree, FILE *fp));
extern NODE *do_sqrt P((NODE *tree));
extern NODE *do_substr P((NODE *tree));
extern NODE *do_strftime P((NODE *tree));
extern NODE *do_systime P((NODE *tree));
extern NODE *do_system P((NODE *tree));
extern void do_print P((NODE *tree));
extern NODE *do_tolower P((NODE *tree));
extern NODE *do_toupper P((NODE *tree));
extern NODE *do_atan2 P((NODE *tree));
extern NODE *do_sin P((NODE *tree));
extern NODE *do_cos P((NODE *tree));
extern NODE *do_rand P((NODE *tree));
extern NODE *do_srand P((NODE *tree));
extern NODE *do_match P((NODE *tree));
extern NODE *do_gsub P((NODE *tree));
extern NODE *do_sub P((NODE *tree));
extern NODE *do_gensub P((NODE *tree));
#ifdef BITOPS
extern NODE *do_lshift P((NODE *tree));
extern NODE *do_rshift P((NODE *tree));
extern NODE *do_and P((NODE *tree));
extern NODE *do_or P((NODE *tree));
extern NODE *do_xor P((NODE *tree));
extern NODE *do_compl P((NODE *tree));
extern NODE *do_strtonum P((NODE *tree));
#endif /* BITOPS */
#if defined(BITOPS) || defined(NONDECDATA)
extern AWKNUM nondec2awknum P((char *str, size_t len));
#endif /* defined(BITOPS) || defined(NONDECDATA) */
/* eval.c */
extern int interpret P((NODE *volatile tree));
extern NODE *r_tree_eval P((NODE *tree, int iscond));
extern int cmp_nodes P((NODE *t1, NODE *t2));
extern NODE **r_get_lhs P((NODE *ptr, Func_ptr *assign));
extern void set_IGNORECASE P((void));
void set_OFS P((void));
void set_ORS P((void));
void set_OFMT P((void));
void set_CONVFMT P((void));
extern char *flags2str P((int));
/* field.c */
extern void init_fields P((void));
extern void set_record P((char *buf, int cnt, int freeold));
extern void reset_record P((void));
extern void set_NF P((void));
extern NODE **get_field P((long num, Func_ptr *assign));
extern NODE *do_split P((NODE *tree));
extern void set_FS P((void));
extern void set_FS_if_not_FIELDWIDTHS P((void));
extern void set_RS P((void));
extern void set_FIELDWIDTHS P((void));
extern int using_fieldwidths P((void));
/* gawkmisc.c */
extern char *gawk_name P((const char *filespec));
extern void os_arg_fixup P((int *argcp, char ***argvp));
extern int os_devopen P((const char *name, int flag));
extern int optimal_bufsize P((int fd, struct stat *sbuf));
extern int ispath P((const char *file));
extern int isdirpunct P((int c));
/* io.c */
extern void set_FNR P((void));
extern void set_NR P((void));
extern void do_input P((void));
extern struct redirect *redirect P((NODE *tree, int *errflg));
extern NODE *do_close P((NODE *tree));
extern int flush_io P((void));
extern int close_io P((void));
extern int devopen P((const char *name, const char *mode));
extern int pathopen P((const char *file));
extern NODE *do_getline P((NODE *tree));
extern void do_nextfile P((void));
extern struct redirect *getredirect P((char *str, int len));
/* main.c */
extern int main P((int argc, char **argv));
extern void load_environ P((void));
extern char *arg_assign P((char *arg));
extern RETSIGTYPE catchsig P((int sig, int code));
/* msg.c */
extern void err P((const char *s, const char *emsg, va_list argp));
#if _MSC_VER == 510
extern void msg P((va_list va_alist, ...));
extern void error P((va_list va_alist, ...));
extern void warning P((va_list va_alist, ...));
extern void set_loc P((char *file, int line));
extern void r_fatal P((va_list va_alist, ...));
#else
#if defined(HAVE_STDARG_H) && defined(__STDC__) && __STDC__
extern void msg (char *mesg, ...);
extern void error (char *mesg, ...);
extern void warning (char *mesg, ...);
extern void set_loc (char *file, int line);
extern void r_fatal (char *mesg, ...);
#else
extern void msg ();
extern void error ();
extern void warning ();
extern void set_loc ();
extern void r_fatal ();
#endif
#endif
/* node.c */
extern AWKNUM r_force_number P((NODE *n));
extern NODE *format_val P((char *format, int index, NODE *s));
extern NODE *r_force_string P((NODE *s));
extern NODE *dupnode P((NODE *n));
extern NODE *mk_number P((AWKNUM x, unsigned int flags));
extern NODE *make_str_node P((char *s, size_t len, int scan ));
extern NODE *tmp_string P((char *s, size_t len ));
extern NODE *more_nodes P((void));
#ifdef DEBUG
extern void freenode P((NODE *it));
#endif
extern void unref P((NODE *tmp));
extern int parse_escape P((char **string_ptr));
/* re.c */
extern Regexp *make_regexp P((char *s, size_t len, int ignorecase, int dfa));
extern int research P((Regexp *rp, char *str, int start,
size_t len, int need_start));
extern void refree P((Regexp *rp));
extern void reg_error P((const char *s));
extern Regexp *re_update P((NODE *t));
extern void resyntax P((int syntax));
extern void resetup P((void));
extern int avoid_dfa P((NODE *re, char *str, size_t len)); /* temporary */
/* strncasecmp.c */
extern int strncasecmp P((const char *s1, const char *s2, register size_t n));
#if defined(atarist)
#if defined(PIPES_SIMULATED)
/* atari/tmpnam.c */
extern char *tmpnam P((char *buf));
extern char *tempnam P((const char *path, const char *base));
#else
#include <wait.h>
#endif
#include <fcntl.h>
#define INVALID_HANDLE (__SMALLEST_VALID_HANDLE - 1)
#else
#define INVALID_HANDLE (-1)
#endif /* atarist */
#ifndef STATIC
#define STATIC static
#endif
#ifdef C_ALLOCA
/* The __hpux check is to avoid conflicts with bison's definition of
alloca() in awktab.c.*/
#if (defined(__STDC__) && __STDC__) || defined (__hpux)
extern void *alloca P((unsigned));
#else
extern char *alloca P((unsigned));
#endif
#endif
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