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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"
/* just to make sure */
#if defined (HAVE_UNISTD_H)
# ifdef CRAY
# define word __word
# endif
# include <unistd.h>
# ifdef CRAY
# undef word
# endif
#endif
#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))
#if !defined (savestring)
extern char *xmalloc ();
# if !defined (strcpy)
extern char *strcpy ();
# endif
# define savestring(x) (char *)strcpy (xmalloc (1 + strlen (x)), (x))
#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
/* Definitions used in subst.c and by the `read' builtin for field
splitting. */
#define spctabnl(c) ((c) == ' ' || (c) == '\t' || (c) == '\n')
#if !defined (__STDC__) && !defined (strchr)
extern char *strchr (), *strrchr ();
#endif /* !strchr */
#ifndef member
# if defined (alpha) && defined (__GNUC__) /* XXX */
extern char *strchr ();
# endif
# define member(c, s) ((c) ? ((char *)strchr ((s), (c)) != (char *)NULL) : 0)
#endif
/* 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 (USG) && !defined (HAVE_BCOPY)
# if defined (MEMMOVE_MISSING)
# define FASTCOPY(s, d, n) memcpy (d, s, n)
# else
# define FASTCOPY(s, d, n) memmove (d, s, n)
# endif /* !MEMMOVE_MISSING */
# else
# define FASTCOPY(s, d, n) bcopy (s, d, n)
# endif /* !USG || 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)))
/* What type is a `generic' pointer? This is used as the first argument
to xrealloc. */
#if defined (__STDC__)
typedef void *GENPTR;
#else
typedef char *GENPTR;
#endif
/* 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
/* Posix and USG systems do not guarantee to restart a read () that is
interrupted by a signal. */
#if defined (USG) || defined (_POSIX_VERSION)
# define NO_READ_RESTART_ON_SIGNAL
#endif /* USG || _POSIX_VERSION */
/* Here is a definition for set_signal_handler () which simply expands to
a call to signal () for non-Posix systems. The code for set_signal_handler
in the Posix case resides in general.c. */
#if defined (VOID_SIGHANDLER)
# define sighandler void
#else
# define sighandler int
#endif /* !VOID_SIGHANDLER */
typedef sighandler SigHandler ();
#if !defined (_POSIX_VERSION)
# define set_signal_handler(sig, handler) (SigHandler *)signal (sig, handler)
#else
extern SigHandler *set_signal_handler ();
#endif /* _POSIX_VERSION */
/* This function is defined in trap.c. */
extern SigHandler *set_sigint_handler __P((void));
/* Declarations for functions defined in general.c */
extern char *xmalloc __P((int));
extern char *xrealloc __P((void *, int));
extern void xfree __P((char *));
extern char *itos __P((int));
extern int all_digits __P((char *));
extern long string_to_long __P((char *));
extern int legal_identifier __P((char *));
extern int check_identifier __P((WORD_DESC *, int));
extern void unset_nodelay_mode __P((int));
extern void map_over_words __P((WORD_LIST *, Function *));
extern void map_over_list __P((GENERIC_LIST *, Function *));
extern GENERIC_LIST *reverse_list ();
extern GENERIC_LIST *delete_element ();
extern GENERIC_LIST *list_append ();
extern int list_length ();
extern int qsort_string_compare ();
extern int find_name_in_list __P((char *, char **));
extern int array_len __P((char **));
extern void free_array __P((char **));
extern char **copy_array __P((char **));
extern void strip_leading __P((char *));
extern void strip_trailing __P((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 *strindex __P((char *, char *));
extern void set_lines_and_columns __P((int, int));
extern void xbcopy __P((char *, char *, int));
extern char *polite_directory_format __P((char *));
extern void tilde_initialize __P((void));
#if !defined (strerror)
extern char *strerror __P((int));
#endif
#if defined (RLIMTYPE)
extern RLIMTYPE string_to_rlimtype __P((char *));
extern void print_rlimtype __P((RLIMTYPE, int));
#endif
#if !defined (HAVE_STRCASECMP)
extern int strnicmp __P((char *, char *, int));
extern int stricmp __P((char *, char *));
#else /* HAVE_STRCASECMP */
# define stricmp strcasecmp
# define strnicmp strncasecmp
#endif /* HAVE_STRCASECMP */
extern int dup2 __P((int, int));
extern char *getwd __P((char *));
extern int getdtablesize __P((void));
#if defined (USG) && !defined (HAVE_GETHOSTNAME)
extern int gethostname __P((char *, int));
#endif /* USG && !HAVE_GETHOSTNAME */
#endif /* _GENERAL_H */
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