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/* general.h -- defines that everybody likes to use. */
/* Copyright (C) 1993 Free Software Foundation, Inc.
This file is part of GNU Bash, the Bourne Again SHell.
Bash 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, or (at your option) any later
version.
Bash 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 Bash; see the file COPYING. If not, write to the Free Software
Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
#if !defined (_GENERAL_H_)
#define _GENERAL_H_
#include "stdc.h"
/* Generic pointer type. */
#if defined (__STDC__)
# define PTR_T void *
#else
# define PTR_T char *
#endif
/* NULL pointer type. */
#if !defined (NULL)
# if defined (__STDC__)
# define NULL ((void *) 0)
# else
# define NULL 0x0
# endif /* !__STDC__ */
#endif /* !NULL */
#if defined (HAVE_STRING_H)
# include <string.h>
#else
# include <strings.h>
#endif /* !HAVE_STRING_H */
#define pointer_to_int(x) (int)((long)(x))
extern char *xmalloc (), *xrealloc ();
#if defined (alpha) && defined (__GNUC__) && !defined (strchr) && !defined (__STDC__)
extern char *strchr (), *strrchr ();
#endif
#if !defined (strcpy)
extern char *strcpy ();
#endif
#if !defined (savestring)
# define savestring(x) (char *)strcpy (xmalloc (1 + strlen (x)), (x))
#endif
#ifndef member
# define member(c, s) ((c) ? ((char *)strchr ((s), (c)) != (char *)NULL) : 0)
#endif
#ifndef whitespace
#define whitespace(c) (((c) == ' ') || ((c) == '\t'))
#endif
#ifndef digit
#define digit(c) ((c) >= '0' && (c) <= '9')
#endif
#ifndef isletter
#define isletter(c) (((c) >= 'A' && (c) <= 'Z') || ((c) >= 'a' && (c) <= 'z'))
#endif
#ifndef digit_value
#define digit_value(c) ((c) - '0')
#endif
/* Define exactly what a legal shell identifier consists of. */
#define legal_variable_starter(c) (isletter(c) || (c == '_'))
#define legal_variable_char(c) (isletter (c) || digit (c) || c == '_')
/* Definitions used in subst.c and by the `read' builtin for field
splitting. */
#define spctabnl(c) ((c) == ' ' || (c) == '\t' || (c) == '\n')
/* All structs which contain a `next' field should have that field
as the first field in the struct. This means that functions
can be written to handle the general case for linked lists. */
typedef struct g_list {
struct g_list *next;
} GENERIC_LIST;
/* Here is a generic structure for associating character strings
with integers. It is used in the parser for shell tokenization. */
typedef struct {
char *word;
int token;
} STRING_INT_ALIST;
/* A macro to avoid making an uneccessary function call. */
#define REVERSE_LIST(list, type) \
((list && list->next) ? (type)reverse_list ((GENERIC_LIST *)list) \
: (type)(list))
#if __GNUC__ > 1
# define FASTCOPY(s, d, n) __builtin_memcpy (d, s, n)
#else /* !__GNUC__ */
# if !defined (HAVE_BCOPY)
# if !defined (HAVE_MEMMOVE)
# define FASTCOPY(s, d, n) memcpy (d, s, n)
# else
# define FASTCOPY(s, d, n) memmove (d, s, n)
# endif /* !HAVE_MEMMOVE */
# else /* HAVE_BCOPY */
# define FASTCOPY(s, d, n) bcopy (s, d, n)
# endif /* HAVE_BCOPY */
#endif /* !__GNUC__ */
/* String comparisons that possibly save a function call each. */
#define STREQ(a, b) ((a)[0] == (b)[0] && strcmp(a, b) == 0)
#define STREQN(a, b, n) ((a)[0] == (b)[0] && strncmp(a, b, n) == 0)
/* More convenience definitions that possibly save system or libc calls. */
#define STRLEN(s) (((s) && (s)[0]) ? ((s)[1] ? ((s)[2] ? strlen(s) : 2) : 1) : 0)
#define FREE(s) do { if (s) free (s); } while (0)
#define MEMBER(c, s) (((c) && !(s)[1] && c == s[0]) || (member(c, s)))
/* A fairly hairy macro to check whether an allocated string has more room,
and to resize it using xrealloc if it does not.
STR is the string (char *)
CIND is the current index into the string (int)
ROOM is the amount of additional room we need in the string (int)
CSIZE is the currently-allocated size of STR (int)
SINCR is how much to increment CSIZE before calling xrealloc (int) */
#define RESIZE_MALLOCED_BUFFER(str, cind, room, csize, sincr) \
do { \
if ((cind) + (room) >= csize) \
{ \
while ((cind) + (room) >= csize) \
csize += (sincr); \
str = xrealloc (str, csize); \
} \
} while (0)
/* Function pointers can be declared as (Function *)foo. */
#if !defined (_FUNCTION_DEF)
# define _FUNCTION_DEF
typedef int Function ();
typedef void VFunction ();
typedef char *CPFunction ();
typedef char **CPPFunction ();
#endif /* _FUNCTION_DEF */
#define NOW ((time_t) time ((time_t *) 0))
/* Some defines for calling file status functions. */
#define FS_EXISTS 0x1
#define FS_EXECABLE 0x2
#define FS_EXEC_PREFERRED 0x4
#define FS_EXEC_ONLY 0x8
#define FS_DIRECTORY 0x10
#define FS_NODIRS 0x20
/* Declarations for functions defined in xmalloc.c */
extern char *xmalloc __P((size_t));
extern char *xrealloc __P((void *, size_t));
extern void xfree __P((char *));
/* Declarations for functions defined in general.c */
extern void posix_initialize __P((int));
extern char *itos __P((int));
extern long string_to_long __P((char *));
#if defined (RLIMTYPE)
extern RLIMTYPE string_to_rlimtype __P((char *));
extern void print_rlimtype __P((RLIMTYPE, int));
#endif
extern void timeval_to_secs ();
extern void print_timeval ();
extern void clock_t_to_secs ();
extern void print_time_in_hz ();
extern int all_digits __P((char *));
extern int legal_number __P((char *, long *));
extern int legal_identifier __P((char *));
extern int check_identifier __P((WORD_DESC *, int));
extern void unset_nodelay_mode __P((int));
extern void check_dev_tty __P((void));
extern int same_file (); /* too many problems with prototype */
extern int move_to_high_fd __P((int, int));
extern int check_binary_file __P((unsigned char *, int));
extern char *canonicalize_pathname __P((char *));
extern char *make_absolute __P((char *, char *));
extern int absolute_pathname __P((char *));
extern int absolute_program __P((char *));
extern char *base_pathname __P((char *));
extern char *full_pathname __P((char *));
extern char *polite_directory_format __P((char *));
extern char *extract_colon_unit __P((char *, int *));
extern void tilde_initialize __P((void));
extern char *bash_tilde_expand __P((char *));
#endif /* _GENERAL_H_ */
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