X-Git-Url: http://review.tizen.org/git/?a=blobdiff_plain;f=variables.h;h=213f6ff766787152043aecc4e8eb1846045b2e31;hb=refs%2Ftags%2Fdevel-base-dist;hp=f0da3ef33d570bad7a3217595ecd87c94bc9b856;hpb=f73dda092b33638d2d5e9c35375f687a607b5403;p=platform%2Fupstream%2Fbash.git diff --git a/variables.h b/variables.h index f0da3ef..213f6ff 100644 --- a/variables.h +++ b/variables.h @@ -1,6 +1,6 @@ /* variables.h -- data structures for shell variables. */ -/* Copyright (C) 1987,1991 Free Software Foundation, Inc. +/* Copyright (C) 1987-2002 Free Software Foundation, Inc. This file is part of GNU Bash, the Bourne Again SHell. @@ -29,54 +29,132 @@ #include "conftypes.h" +/* A variable context. */ +typedef struct var_context { + char *name; /* empty or NULL means global context */ + int scope; /* 0 means global context */ + int flags; + struct var_context *up; /* previous function calls */ + struct var_context *down; /* down towards global context */ + HASH_TABLE *table; /* variables at this scope */ +} VAR_CONTEXT; + +/* Flags for var_context->flags */ +#define VC_HASLOCAL 0x01 +#define VC_HASTMPVAR 0x02 +#define VC_FUNCENV 0x04 /* also function if name != NULL */ +#define VC_BLTNENV 0x08 /* builtin_env */ +#define VC_TEMPENV 0x10 /* temporary_env */ + +#define VC_TEMPFLAGS (VC_FUNCENV|VC_BLTNENV|VC_TEMPENV) + +/* Accessing macros */ +#define vc_isfuncenv(vc) (((vc)->flags & VC_FUNCENV) != 0) +#define vc_isbltnenv(vc) (((vc)->flags & VC_BLTNENV) != 0) +#define vc_istempenv(vc) (((vc)->flags & (VC_TEMPFLAGS)) == VC_TEMPENV) + +#define vc_istempscope(vc) (((vc)->flags & (VC_TEMPENV|VC_BLTNENV)) != 0) + +#define vc_haslocals(vc) (((vc)->flags & VC_HASLOCAL) != 0) +#define vc_hastmpvars(vc) (((vc)->flags & VC_HASTMPVAR) != 0) + /* What a shell variable looks like. */ -typedef struct variable *DYNAMIC_FUNC (); +typedef struct variable *sh_var_value_func_t __P((struct variable *)); +typedef struct variable *sh_var_assign_func_t __P((struct variable *, char *, arrayind_t)); + +/* For the future */ +union _value { + char *s; /* string value */ + intmax_t i; /* int value */ + COMMAND *f; /* function */ + ARRAY *a; /* array */ + HASH_TABLE *h; /* associative array */ + double d; /* floating point number */ + void *v; /* opaque data for future use */ +}; 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' + sh_var_value_func_t *dynamic_value; /* Function called to return a `dynamic' value for a variable, like $SECONDS or $RANDOM. */ - DYNAMIC_FUNC *assign_func; /* Function called when this `special + sh_var_assign_func_t *assign_func; /* Function called when this `special variable' is assigned a value in bind_variable. */ int attributes; /* export, readonly, array, invisible... */ int context; /* Which context this variable belongs to. */ - struct variable *prev_context; /* Value from previous context or NULL. */ } SHELL_VAR; +typedef struct _vlist { + SHELL_VAR **list; + int list_size; /* allocated size */ + int list_len; /* current number of entries */ +} VARLIST; + /* 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 */ +/* First, the user-visible attributes */ +#define att_exported 0x0000001 /* export to environment */ +#define att_readonly 0x0000002 /* cannot change */ +#define att_array 0x0000004 /* value is an array */ +#define att_function 0x0000008 /* value is a function */ +#define att_integer 0x0000010 /* internal representation is int */ +#define att_local 0x0000020 /* variable is local to a function */ +#define att_assoc 0x0000040 /* variable is an associative array */ +#define att_trace 0x0000080 /* function is traced with DEBUG trap */ + +#define attmask_user 0x0000fff + +/* Internal attributes used for bookkeeping */ +#define att_invisible 0x0001000 /* cannot see */ +#define att_nounset 0x0002000 /* cannot unset */ +#define att_noassign 0x0004000 /* assignment not allowed */ +#define att_imported 0x0008000 /* came from environment */ +#define att_special 0x0010000 /* requires special handling */ + +#define attmask_int 0x00ff000 + +/* Internal attributes used for variable scoping. */ +#define att_tempvar 0x0100000 /* variable came from the temp environment */ +#define att_propagate 0x0200000 /* propagate to previous scope */ + +#define attmask_scope 0x0f00000 #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 local_p(var) ((((var)->attributes) & (att_local))) -#define tempvar_p(var) ((((var)->attributes) & (att_tempvar))) +#define assoc_p(var) ((((var)->attributes) & (att_assoc))) +#define trace_p(var) ((((var)->attributes) & (att_trace))) + +#define invisible_p(var) ((((var)->attributes) & (att_invisible))) +#define non_unsettable_p(var) ((((var)->attributes) & (att_nounset))) #define noassign_p(var) ((((var)->attributes) & (att_noassign))) +#define imported_p(var) ((((var)->attributes) & (att_imported))) +#define specialvar_p(var) ((((var)->attributes) & (att_special))) + +#define tempvar_p(var) ((((var)->attributes) & (att_tempvar))) + +/* Acessing variable values: rvalues */ +#define value_cell(var) ((var)->value) +#define function_cell(var) (COMMAND *)((var)->value) +#define array_cell(var) (ARRAY *)((var)->value) + +#define var_isnull(var) ((var)->value == 0) +#define var_isset(var) ((var)->value != 0) + +/* Assigning variable values: lvalues */ +#define var_setvalue(var, str) ((var)->value = (str)) +#define var_setfunc(var, func) ((var)->value = (char *)(func)) +#define var_setarray(var, arr) ((var)->value = (char *)(arr)) -#define value_cell(var) ((var)->value) -#define function_cell(var) (COMMAND *)((var)->value) -#define array_cell(var) ((ARRAY *)(var)->value) +/* Make VAR be auto-exported. */ +#define set_auto_export(var) \ + do { (var)->attributes |= att_exported; array_needs_making = 1; } while (0) #define SETVARATTR(var, attr, undo) \ ((undo == 0) ? ((var)->attributes |= (attr)) \ @@ -97,58 +175,43 @@ typedef struct variable { #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) + do { if ((var)->exportstr) 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 + (var)->exportstr = savestring (value) #define INVALIDATE_EXPORTSTR(var) \ do { \ if ((var)->exportstr) \ { \ - if (((var)->attributes & att_importstr) == 0) \ - free ((var)->exportstr); \ + free ((var)->exportstr); \ (var)->exportstr = (char *)NULL; \ - (var)->attributes &= ~att_importstr; \ } \ } while (0) /* Stuff for hacking variables. */ typedef int sh_var_map_func_t __P((SHELL_VAR *)); +/* Where we keep the variables and functions */ +extern VAR_CONTEXT *global_variables; +extern VAR_CONTEXT *shell_variables; + +extern HASH_TABLE *shell_functions; +extern HASH_TABLE *temporary_env; + extern int variable_context; -extern HASH_TABLE *shell_variables, *shell_functions; extern char *dollar_vars[]; extern char **export_env; -extern char **non_unsettable_vars; 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 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 *var_lookup __P((const char *, HASH_TABLE *)); +extern SHELL_VAR *var_lookup __P((const char *, VAR_CONTEXT *)); extern SHELL_VAR *find_function __P((const char *)); extern SHELL_VAR *find_variable __P((const char *)); @@ -159,35 +222,53 @@ extern SHELL_VAR *make_local_variable __P((const char *)); extern SHELL_VAR *bind_variable __P((const char *, char *)); extern SHELL_VAR *bind_function __P((const char *, COMMAND *)); -extern SHELL_VAR **map_over __P((sh_var_map_func_t *, HASH_TABLE *)); +extern SHELL_VAR **map_over __P((sh_var_map_func_t *, VAR_CONTEXT *)); +SHELL_VAR **map_over_funcs __P((sh_var_map_func_t *)); + 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)); +extern SHELL_VAR **local_exported_variables __P((void)); +extern SHELL_VAR **all_local_variables __P((void)); #if defined (ARRAY_VARS) extern SHELL_VAR **all_array_variables __P((void)); #endif - extern char **all_variables_matching_prefix __P((const char *)); extern char **make_var_array __P((HASH_TABLE *)); extern char **add_or_supercede_exported_var __P((char *, int)); +extern char *get_variable_value __P((SHELL_VAR *)); extern char *get_string_value __P((const char *)); +extern char *sh_get_env_value __P((const char *)); extern char *make_variable_value __P((SHELL_VAR *, char *)); extern SHELL_VAR *bind_variable_value __P((SHELL_VAR *, char *)); extern SHELL_VAR *bind_int_variable __P((char *, char *)); -extern SHELL_VAR *bind_var_to_int __P((char *, long)); +extern SHELL_VAR *bind_var_to_int __P((char *, intmax_t)); -extern int assignment __P((const char *)); -extern int variable_in_context __P((SHELL_VAR *)); extern int assign_in_env __P((const char *)); extern int unbind_variable __P((const char *)); -extern int makunbound __P((const char *, HASH_TABLE *)); +extern int unbind_func __P((const char *)); +extern int makunbound __P((const char *, VAR_CONTEXT *)); extern int kill_local_variable __P((const char *)); extern void delete_all_variables __P((HASH_TABLE *)); +extern void delete_all_contexts __P((VAR_CONTEXT *)); + +extern VAR_CONTEXT *new_var_context __P((char *, int)); +extern void dispose_var_context __P((VAR_CONTEXT *)); +extern VAR_CONTEXT *push_var_context __P((char *, int, HASH_TABLE *)); +extern void pop_var_context __P((void)); +extern VAR_CONTEXT *push_scope __P((int, HASH_TABLE *)); +extern void pop_scope __P((int)); + +extern void push_context __P((char *, int, HASH_TABLE *)); +extern void pop_context __P((void)); +extern void push_dollar_vars __P((void)); +extern void pop_dollar_vars __P((void)); +extern void dispose_saved_dollar_vars __P((void)); extern void adjust_shell_level __P((int)); extern void non_unsettable __P((char *)); @@ -197,30 +278,31 @@ extern void dispose_function_env __P((void)); extern void dispose_builtin_env __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((const char *)); extern void set_var_auto_export __P((char *)); extern void set_func_auto_export __P((const 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((long, char *)); +extern void put_gnu_argv_flags_into_env __P((intmax_t, 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 *, 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 void set_pipestatus_array __P((int *)); +extern void set_pipestatus_array __P((int *, int)); #endif extern void set_pipestatus_from_exit __P((int)); @@ -233,6 +315,7 @@ extern int get_random_number __P((void)); /* The `special variable' functions that get called when a particular variable is set. */ +extern void sv_ifs __P((char *)); extern void sv_path __P((char *)); extern void sv_mail __P((char *)); extern void sv_globignore __P((char *));