dmbcs/i-bash
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions
i-bash/general.h
Chet Ramey 495aee441b Bash-4.2 distribution sources and documentation
2011-11-22 19:11:26 -05:00

327 lines
10 KiB
C
Raw Blame History

/* general.h -- defines that everybody likes to use. */
/* Copyright (C) 1993-2009 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 3 of the License, 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. If not, see <http://www.gnu.org/licenses/>.
*/
#if !defined (_GENERAL_H_)
#define _GENERAL_H_
#include "stdc.h"
#include "bashtypes.h"
#include "chartypes.h"
#if defined (HAVE_SYS_RESOURCE_H) && defined (RLIMTYPE)
# if defined (HAVE_SYS_TIME_H)
# include <sys/time.h>
# endif
# include <sys/resource.h>
#endif
#if defined (HAVE_STRING_H)
# include <string.h>
#else
# include <strings.h>
#endif /* !HAVE_STRING_H */
#if defined (HAVE_LIMITS_H)
# include <limits.h>
#endif
#include "xmalloc.h"
/* NULL pointer type. */
#if !defined (NULL)
# if defined (__STDC__)
# define NULL ((void *) 0)
# else
# define NULL 0x0
# endif /* !__STDC__ */
#endif /* !NULL */
/* Hardly used anymore */
#define pointer_to_int(x) (int)((char *)x - (char *)0)
#if defined (alpha) && defined (__GNUC__) && !defined (strchr) && !defined (__STDC__)
extern char *strchr (), *strrchr ();
#endif
#if !defined (strcpy) && (defined (HAVE_DECL_STRCPY) && !HAVE_DECL_STRCPY)
extern char *strcpy __P((char *, const char *));
#endif
#if !defined (savestring)
# define savestring(x) (char *)strcpy (xmalloc (1 + strlen (x)), (x))
#endif
#ifndef member
# define member(c, s) ((c) ? ((char *)mbschr ((s), (c)) != (char *)NULL) : 0)
#endif
#ifndef whitespace
#define whitespace(c) (((c) == ' ') || ((c) == '\t'))
#endif
#ifndef CHAR_MAX
# ifdef __CHAR_UNSIGNED__
# define CHAR_MAX 0xff
# else
# define CHAR_MAX 0x7f
# endif
#endif
#ifndef CHAR_BIT
# define CHAR_BIT 8
#endif
/* Nonzero if the integer type T is signed. */
#define TYPE_SIGNED(t) (! ((t) 0 < (t) -1))
/* Bound on length of the string representing an integer value of type T.
Subtract one for the sign bit if T is signed;
302 / 1000 is log10 (2) rounded up;
add one for integer division truncation;
add one more for a minus sign if t is signed. */
#define INT_STRLEN_BOUND(t) \
((sizeof (t) * CHAR_BIT - TYPE_SIGNED (t)) * 302 / 1000 \
+ 1 + TYPE_SIGNED (t))
/* Define exactly what a legal shell identifier consists of. */
#define legal_variable_starter(c) (ISALPHA(c) || (c == '_'))
#define legal_variable_char(c) (ISALNUM(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)list_reverse ((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) ((n == 0) ? (1) \
: ((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) && c == (s)[0] && !(s)[1]) || (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 (); /* no longer used */
typedef char **CPPFunction (); /* no longer used */
#endif /* _FUNCTION_DEF */
#ifndef SH_FUNCTION_TYPEDEF
# define SH_FUNCTION_TYPEDEF
/* Shell function typedefs with prototypes */
/* `Generic' function pointer typedefs */
typedef int sh_intfunc_t __P((int));
typedef int sh_ivoidfunc_t __P((void));
typedef int sh_icpfunc_t __P((char *));
typedef int sh_icppfunc_t __P((char **));
typedef int sh_iptrfunc_t __P((PTR_T));
typedef void sh_voidfunc_t __P((void));
typedef void sh_vintfunc_t __P((int));
typedef void sh_vcpfunc_t __P((char *));
typedef void sh_vcppfunc_t __P((char **));
typedef void sh_vptrfunc_t __P((PTR_T));
typedef int sh_wdesc_func_t __P((WORD_DESC *));
typedef int sh_wlist_func_t __P((WORD_LIST *));
typedef int sh_glist_func_t __P((GENERIC_LIST *));
typedef char *sh_string_func_t __P((char *)); /* like savestring, et al. */
typedef int sh_msg_func_t __P((const char *, ...)); /* printf(3)-like */
typedef void sh_vmsg_func_t __P((const char *, ...)); /* printf(3)-like */
/* Specific function pointer typedefs. Most of these could be done
with #defines. */
typedef void sh_sv_func_t __P((char *)); /* sh_vcpfunc_t */
typedef void sh_free_func_t __P((PTR_T)); /* sh_vptrfunc_t */
typedef void sh_resetsig_func_t __P((int)); /* sh_vintfunc_t */
typedef int sh_ignore_func_t __P((const char *)); /* sh_icpfunc_t */
typedef int sh_assign_func_t __P((const char *));
typedef int sh_wassign_func_t __P((WORD_DESC *, int));
typedef int sh_builtin_func_t __P((WORD_LIST *)); /* sh_wlist_func_t */
#endif /* SH_FUNCTION_TYPEDEF */
#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
#define FS_READABLE 0x40
/* Default maximum for move_to_high_fd */
#define HIGH_FD_MAX 256
/* The type of function passed as the fourth argument to qsort(3). */
#ifdef __STDC__
typedef int QSFUNC (const void *, const void *);
#else
typedef int QSFUNC ();
#endif
/* Some useful definitions for Unix pathnames. Argument convention:
x == string, c == character */
#if !defined (__CYGWIN__)
# define ABSPATH(x) ((x)[0] == '/')
# define RELPATH(x) ((x)[0] != '/')
#else /* __CYGWIN__ */
# define ABSPATH(x) (((x)[0] && ISALPHA((unsigned char)(x)[0]) && (x)[1] == ':') || ISDIRSEP((x)[0]))
# define RELPATH(x) (ABSPATH(x) == 0)
#endif /* __CYGWIN__ */
#define ROOTEDPATH(x) (ABSPATH(x))
#define DIRSEP '/'
#if !defined (__CYGWIN__)
# define ISDIRSEP(c) ((c) == '/')
#else
# define ISDIRSEP(c) ((c) == '/' || (c) == '\\')
#endif /* __CYGWIN__ */
#define PATHSEP(c) (ISDIRSEP(c) || (c) == 0)
#if 0
/* Declarations for functions defined in xmalloc.c */
extern PTR_T xmalloc __P((size_t));
extern PTR_T xrealloc __P((void *, size_t));
extern void xfree __P((void *));
#endif
/* Declarations for functions defined in general.c */
extern void posix_initialize __P((int));
#if defined (RLIMTYPE)
extern RLIMTYPE string_to_rlimtype __P((char *));
extern void print_rlimtype __P((RLIMTYPE, int));
#endif
extern int all_digits __P((char *));
extern int legal_number __P((const char *, intmax_t *));
extern int legal_identifier __P((char *));
extern int check_identifier __P((WORD_DESC *, int));
extern int legal_alias_name __P((char *, int));
extern int assignment __P((const char *, int));
extern int sh_unset_nodelay_mode __P((int));
extern int sh_validfd __P((int));
extern int fd_ispipe __P((int));
extern void check_dev_tty __P((void));
extern int move_to_high_fd __P((int, int, int));
extern int check_binary_file __P((char *, int));
#ifdef _POSIXSTAT_H_
extern int same_file __P((char *, char *, struct stat *, struct stat *));
#endif
extern int sh_openpipe __P((int *));
extern int sh_closepipe __P((int *));
extern int file_exists __P((char *));
extern int file_isdir __P((char *));
extern int file_iswdir __P((char *));
extern int dot_or_dotdot __P((const char *));
extern int absolute_pathname __P((const char *));
extern int absolute_program __P((const char *));
extern char *make_absolute __P((char *, char *));
extern char *base_pathname __P((char *));
extern char *full_pathname __P((char *));
extern char *polite_directory_format __P((char *));
extern char *trim_pathname __P((char *, int));
extern char *extract_colon_unit __P((char *, int *));
extern void tilde_initialize __P((void));
extern char *bash_tilde_find_word __P((const char *, int, int *));
extern char *bash_tilde_expand __P((const char *, int));
extern int group_member __P((gid_t));
extern char **get_group_list __P((int *));
extern int *get_group_array __P((int *));
#endif /* _GENERAL_H_ */
Reference in a new issue View git blame Copy permalink