/* variables.h -- data structures for shell variables. */
+/* Copyright (C) 1987,1991 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, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */
+
#if !defined (_VARIABLES_H_)
#define _VARIABLES_H_
#include "stdc.h"
+#include "array.h"
/* Shell variables and functions are stored in hash tables. */
-#include "hash.h"
+#include "hashlib.h"
+
+/* Placeholder for future modifications if cross-compiling or building a
+ `fat' binary, e.g. on Apple Rhapsody. These values are used in multiple
+ files, so they appear here. */
+#if !defined (RHAPSODY)
+# define HOSTTYPE CONF_HOSTTYPE
+# define OSTYPE CONF_OSTYPE
+# define MACHTYPE CONF_MACHTYPE
+#else /* RHAPSODY */
+# if defined(__powerpc__) || defined(__ppc__)
+# define HOSTTYPE "powerpc"
+# elif defined(__i386__)
+# define HOSTTYPE "i386"
+# else
+# define HOSTTYPE CONF_HOSTTYPE
+# endif
+
+# define OSTYPE CONF_OSTYPE
+# define VENDOR CONF_VENDOR
+
+# define MACHTYPE HOSTTYPE "-" VENDOR "-" OSTYPE
+#endif /* RHAPSODY */
/* What a shell variable looks like. */
typedef struct variable {
char *name; /* Symbol that the user types. */
char *value; /* Value that is returned. */
+ char *exportstr; /* String for the environment. */
DYNAMIC_FUNC *dynamic_value; /* Function called to return a `dynamic'
value for a variable, like $SECONDS
or $RANDOM. */
struct variable *prev_context; /* Value from previous context or NULL. */
} SHELL_VAR;
-/* The various attributes that a given variable can have.
- We only reserve one byte of the INT. */
-#define att_exported 0x01 /* %00000001 (export to environment) */
-#define att_readonly 0x02 /* %00000010 (cannot change) */
-#define att_invisible 0x04 /* %00000100 (cannot see) */
-#define att_array 0x08 /* %00001000 (value is an array) */
-#define att_nounset 0x10 /* %00010000 (cannot unset) */
-#define att_function 0x20 /* %00100000 (value is a function) */
-#define att_integer 0x40 /* %01000000 (internal rep. is int) */
-#define att_imported 0x80 /* %10000000 (came from environment) */
+/* The various attributes that a given variable can have. */
+#define att_exported 0x001 /* export to environment */
+#define att_readonly 0x002 /* cannot change */
+#define att_invisible 0x004 /* cannot see */
+#define att_array 0x008 /* value is an array */
+#define att_nounset 0x010 /* cannot unset */
+#define att_function 0x020 /* value is a function */
+#define att_integer 0x040 /* internal representation is int */
+#define att_imported 0x080 /* came from environment */
+#define att_local 0x100 /* variable is local to a function */
+#define att_tempvar 0x200 /* variable came from the temp environment */
+#define att_importstr 0x400 /* exportstr points into initial environment */
+#define att_noassign 0x800 /* assignment not allowed */
#define exported_p(var) ((((var)->attributes) & (att_exported)))
#define readonly_p(var) ((((var)->attributes) & (att_readonly)))
#define invisible_p(var) ((((var)->attributes) & (att_invisible)))
#define array_p(var) ((((var)->attributes) & (att_array)))
+#define non_unsettable_p(var) ((((var)->attributes) & (att_nounset)))
#define function_p(var) ((((var)->attributes) & (att_function)))
#define integer_p(var) ((((var)->attributes) & (att_integer)))
-#define imported_p(var) ((((var)->attributes) & (att_imported)))
+#define imported_p(var) ((((var)->attributes) & (att_imported)))
+#define local_p(var) ((((var)->attributes) & (att_local)))
+#define tempvar_p(var) ((((var)->attributes) & (att_tempvar)))
+#define noassign_p(var) ((((var)->attributes) & (att_noassign)))
#define value_cell(var) ((var)->value)
#define function_cell(var) (COMMAND *)((var)->value)
+#define array_cell(var) ((ARRAY *)(var)->value)
+
+#define SETVARATTR(var, attr, undo) \
+ ((undo == 0) ? ((var)->attributes |= (attr)) \
+ : ((var)->attributes &= ~(attr)))
+#define VSETATTR(var, attr) ((var)->attributes |= (attr))
+#define VUNSETATTR(var, attr) ((var)->attributes &= ~(attr))
+
+/* Macros to perform various operations on `exportstr' member of a SHELL_VAR. */
+#define CLEAR_EXPORTSTR(var) (var)->exportstr = (char *)NULL
+#define COPY_EXPORTSTR(var) ((var)->exportstr) ? savestring ((var)->exportstr) : (char *)NULL
+#define SET_EXPORTSTR(var, value) (var)->exportstr = (value)
+#define SAVE_EXPORTSTR(var, value) (var)->exportstr = (value) ? savestring (value) : (char *)NULL
+
+#define FREE_EXPORTSTR(var) \
+ do { \
+ if ((var)->exportstr) \
+ { \
+ if (((var)->attributes & att_importstr) == 0) \
+ free ((var)->exportstr); \
+ } \
+ } while (0)
+
+#if 0
+#define CACHE_IMPORTSTR(var, value) \
+ do { \
+ (var)->exportstr = value; \
+ (var)->attributes |= att_importstr; \
+ } while (0)
+#else
+#define CACHE_IMPORTSTR(var, value) \
+ do { \
+ (var)->exportstr = savestring (value); \
+ } while (0)
+#endif
+
+#define INVALIDATE_EXPORTSTR(var) \
+ do { \
+ if ((var)->exportstr) \
+ { \
+ if (((var)->attributes & att_importstr) == 0) \
+ free ((var)->exportstr); \
+ (var)->exportstr = (char *)NULL; \
+ (var)->attributes &= ~att_importstr; \
+ } \
+ } while (0)
+
/* Stuff for hacking variables. */
extern int variable_context;
extern HASH_TABLE *shell_variables, *shell_functions;
extern char **export_env;
extern char **non_unsettable_vars;
-extern void initialize_shell_variables __P((char **));
+extern void initialize_shell_variables __P((char **, int));
+extern SHELL_VAR *set_if_not __P((char *, char *));
+extern void sh_set_lines_and_columns __P((int, int));
+
+extern void set_pwd __P((void));
+
+extern void set_ppid __P((void));
+
+extern void make_funcname_visible __P((int));
extern SHELL_VAR *find_function __P((char *));
extern SHELL_VAR *find_variable __P((char *));
extern SHELL_VAR *find_variable_internal __P((char *, int));
extern SHELL_VAR *find_tempenv_variable __P((char *));
extern SHELL_VAR *copy_variable __P((SHELL_VAR *));
-extern SHELL_VAR *set_if_not __P((char *, char *));
extern SHELL_VAR *make_local_variable __P((char *));
extern SHELL_VAR *bind_variable __P((char *, char *));
extern SHELL_VAR *bind_function __P((char *, COMMAND *));
+
extern SHELL_VAR **map_over __P((Function *, HASH_TABLE *));
extern SHELL_VAR **all_shell_variables __P((void));
extern SHELL_VAR **all_shell_functions __P((void));
extern SHELL_VAR **all_visible_variables __P((void));
extern SHELL_VAR **all_visible_functions __P((void));
+extern SHELL_VAR **all_exported_variables __P((void));
+#if defined (ARRAY_VARS)
+extern SHELL_VAR **all_array_variables __P((void));
+#endif
+
+extern char **all_variables_matching_prefix __P((char *));
extern char **make_var_array __P((HASH_TABLE *));
-extern char **add_or_supercede __P((char *, char **));
+extern char **add_or_supercede_exported_var __P((char *, int));
+
+extern char *get_string_value __P((const char *));
+extern char *make_variable_value __P((SHELL_VAR *, char *));
-extern char *get_string_value __P((char *));
+extern SHELL_VAR *bind_variable_value __P((SHELL_VAR *, char *));
+extern SHELL_VAR *bind_int_variable __P((char *, char *));
extern int assignment __P((char *));
extern int variable_in_context __P((SHELL_VAR *));
extern void adjust_shell_level __P((int));
extern void non_unsettable __P((char *));
extern void dispose_variable __P((SHELL_VAR *));
+extern void dispose_used_env_vars __P((void));
extern void dispose_function_env __P((void));
extern void dispose_builtin_env __P((void));
-extern void dispose_used_env_vars __P((void));
+extern void merge_temporary_env __P((void));
+extern void merge_builtin_env __P((void));
+extern void merge_function_env __P((void));
extern void kill_all_local_variables __P((void));
extern void set_var_read_only __P((char *));
extern void set_func_read_only __P((char *));
extern void set_var_auto_export __P((char *));
extern void set_func_auto_export __P((char *));
-extern void sort_char_array __P((char **));
extern void sort_variables __P((SHELL_VAR **));
extern void maybe_make_export_env __P((void));
+extern void update_export_env_inplace __P((char *, int, char *));
extern void put_command_name_into_env __P((char *));
+extern void put_gnu_argv_flags_into_env __P((int, char *));
extern void print_var_list __P((SHELL_VAR **));
+extern void print_func_list __P((SHELL_VAR **));
extern void print_assignment __P((SHELL_VAR *));
-extern void print_var_value __P((SHELL_VAR *));
+extern void print_var_value __P((SHELL_VAR *, int));
extern void print_var_function __P((SHELL_VAR *));
+extern char *indirection_level_string __P((void));
+
+#if defined (ARRAY_VARS)
+extern SHELL_VAR *make_new_array_variable __P((char *));
+extern SHELL_VAR *make_local_array_variable __P((char *));
+extern SHELL_VAR *convert_var_to_array __P((SHELL_VAR *));
+extern SHELL_VAR *bind_array_variable __P((char *, int, char *));
+extern SHELL_VAR *assign_array_from_string __P((char *, char *));
+extern SHELL_VAR *assign_array_var_from_word_list __P((SHELL_VAR *, WORD_LIST *));
+extern SHELL_VAR *assign_array_var_from_string __P((SHELL_VAR *, char *));
+extern int unbind_array_element __P((SHELL_VAR *, char *));
+extern int skipsubscript __P((char *, int));
+extern void print_array_assignment __P((SHELL_VAR *, int));
+
+extern void set_pipestatus_array __P((int *));
+#endif
+
+extern void set_pipestatus_from_exit __P((int));
+
+/* The variable in NAME has just had its state changed. Check to see if it
+ is one of the special ones where something special happens. */
+extern void stupidly_hack_special_variables __P((char *));
+
+extern int get_random_number __P((void));
+
+/* The `special variable' functions that get called when a particular
+ variable is set. */
+void sv_path (), sv_mail (), sv_ignoreeof (), sv_strict_posix ();
+void sv_optind (), sv_opterr (), sv_globignore (), sv_locale ();
+
+#if defined (READLINE)
+void sv_terminal (), sv_hostfile ();
+#endif
+
+#if defined (HAVE_TZSET) && defined (PROMPT_STRING_DECODE)
+void sv_tz ();
+#endif
+
+#if defined (HISTORY)
+void sv_histsize (), sv_histignore (), sv_history_control ();
+# if defined (BANG_HISTORY)
+void sv_histchars ();
+# endif
+#endif /* HISTORY */
+
#endif /* !_VARIABLES_H_ */
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