1 /* arrayfunc.c -- High-level array functions used by other parts of the shell. */
3 /* Copyright (C) 2001-2016 Free Software Foundation, Inc.
5 This file is part of GNU Bash, the Bourne Again SHell.
7 Bash is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 Bash is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with Bash. If not, see <http://www.gnu.org/licenses/>.
23 #if defined (ARRAY_VARS)
25 #if defined (HAVE_UNISTD_H)
36 #if defined (HAVE_MBSTR_H) && defined (HAVE_MBSCHR)
37 # include <mbstr.h> /* mbschr */
40 #include "builtins/common.h"
42 extern char *this_command_name
;
43 extern int last_command_exit_value
;
44 extern int array_needs_making
;
46 static SHELL_VAR
*bind_array_var_internal
__P((SHELL_VAR
*, arrayind_t
, char *, char *, int));
47 static SHELL_VAR
*assign_array_element_internal
__P((SHELL_VAR
*, char *, char *, char *, int, char *, int));
49 static char *quote_assign
__P((const char *));
50 static void quote_array_assignment_chars
__P((WORD_LIST
*));
51 static char *array_value_internal
__P((const char *, int, int, int *, arrayind_t
*));
53 /* Standard error message to use when encountering an invalid array subscript */
54 const char * const bash_badsub_errmsg
= N_("bad array subscript");
56 /* **************************************************************** */
58 /* Functions to manipulate array variables and perform assignments */
60 /* **************************************************************** */
62 /* Convert a shell variable to an array variable. The original value is
65 convert_var_to_array (var
)
71 oldval
= value_cell (var
);
72 array
= array_create ();
74 array_insert (array
, 0, oldval
);
76 FREE (value_cell (var
));
77 var_setarray (var
, array
);
79 /* these aren't valid anymore */
80 var
->dynamic_value
= (sh_var_value_func_t
*)NULL
;
81 var
->assign_func
= (sh_var_assign_func_t
*)NULL
;
83 INVALIDATE_EXPORTSTR (var
);
87 VSETATTR (var
, att_array
);
88 VUNSETATTR (var
, att_invisible
);
90 /* Make sure it's not marked as an associative array any more */
91 VUNSETATTR (var
, att_assoc
);
93 /* Since namerefs can't be array variables, turn off nameref attribute */
94 VUNSETATTR (var
, att_nameref
);
99 /* Convert a shell variable to an array variable. The original value is
100 saved as array[0]. */
102 convert_var_to_assoc (var
)
108 oldval
= value_cell (var
);
109 hash
= assoc_create (0);
111 assoc_insert (hash
, savestring ("0"), oldval
);
113 FREE (value_cell (var
));
114 var_setassoc (var
, hash
);
116 /* these aren't valid anymore */
117 var
->dynamic_value
= (sh_var_value_func_t
*)NULL
;
118 var
->assign_func
= (sh_var_assign_func_t
*)NULL
;
120 INVALIDATE_EXPORTSTR (var
);
121 if (exported_p (var
))
122 array_needs_making
++;
124 VSETATTR (var
, att_assoc
);
125 VUNSETATTR (var
, att_invisible
);
127 /* Make sure it's not marked as an indexed array any more */
128 VUNSETATTR (var
, att_array
);
130 /* Since namerefs can't be array variables, turn off nameref attribute */
131 VUNSETATTR (var
, att_nameref
);
137 make_array_variable_value (entry
, ind
, key
, value
, flags
)
147 /* If we're appending, we need the old value of the array reference, so
148 fake out make_variable_value with a dummy SHELL_VAR */
149 if (flags
& ASS_APPEND
)
151 dentry
= (SHELL_VAR
*)xmalloc (sizeof (SHELL_VAR
));
152 dentry
->name
= savestring (entry
->name
);
154 newval
= assoc_reference (assoc_cell (entry
), key
);
156 newval
= array_reference (array_cell (entry
), ind
);
158 dentry
->value
= savestring (newval
);
161 dentry
->value
= (char *)xmalloc (1);
162 dentry
->value
[0] = '\0';
164 dentry
->exportstr
= 0;
165 dentry
->attributes
= entry
->attributes
& ~(att_array
|att_assoc
|att_exported
);
166 /* Leave the rest of the members uninitialized; the code doesn't look
168 newval
= make_variable_value (dentry
, value
, flags
);
169 dispose_variable (dentry
);
172 newval
= make_variable_value (entry
, value
, flags
);
178 bind_array_var_internal (entry
, ind
, key
, value
, flags
)
187 newval
= make_array_variable_value (entry
, ind
, key
, value
, flags
);
189 if (entry
->assign_func
)
190 (*entry
->assign_func
) (entry
, newval
, ind
, key
);
191 else if (assoc_p (entry
))
192 assoc_insert (assoc_cell (entry
), key
, newval
);
194 array_insert (array_cell (entry
), ind
, newval
);
197 VUNSETATTR (entry
, att_invisible
); /* no longer invisible */
201 /* Perform an array assignment name[ind]=value. If NAME already exists and
202 is not an array, and IND is 0, perform name=value instead. If NAME exists
203 and is not an array, and IND is not 0, convert it into an array with the
204 existing value as name[0].
206 If NAME does not exist, just create an array variable, no matter what
207 IND's value may be. */
209 bind_array_variable (name
, ind
, value
, flags
)
217 entry
= find_shell_variable (name
);
219 if (entry
== (SHELL_VAR
*) 0)
221 /* Is NAME a nameref variable that points to an unset variable? */
222 entry
= find_variable_nameref_for_create (name
, 0);
223 if (entry
== INVALID_NAMEREF_VALUE
)
224 return ((SHELL_VAR
*)0);
225 if (entry
&& nameref_p (entry
))
226 entry
= make_new_array_variable (nameref_cell (entry
));
228 if (entry
== (SHELL_VAR
*) 0)
229 entry
= make_new_array_variable (name
);
230 else if ((readonly_p (entry
) && (flags
&ASS_FORCE
) == 0) || noassign_p (entry
))
232 if (readonly_p (entry
))
236 else if (array_p (entry
) == 0)
237 entry
= convert_var_to_array (entry
);
239 /* ENTRY is an array variable, and ARRAY points to the value. */
240 return (bind_array_var_internal (entry
, ind
, 0, value
, flags
));
244 bind_array_element (entry
, ind
, value
, flags
)
250 return (bind_array_var_internal (entry
, ind
, 0, value
, flags
));
254 bind_assoc_variable (entry
, name
, key
, value
, flags
)
264 if ((readonly_p (entry
) && (flags
&ASS_FORCE
) == 0) || noassign_p (entry
))
266 if (readonly_p (entry
))
271 return (bind_array_var_internal (entry
, 0, key
, value
, flags
));
274 /* Parse NAME, a lhs of an assignment statement of the form v[s], and
275 assign VALUE to that array element by calling bind_array_variable(). */
277 assign_array_element (name
, value
, flags
)
283 SHELL_VAR
*entry
, *nv
;
285 vname
= array_variable_name (name
, &sub
, &sublen
);
288 return ((SHELL_VAR
*)NULL
);
290 if ((ALL_ELEMENT_SUB (sub
[0]) && sub
[1] == ']') || (sublen
<= 1))
293 err_badarraysub (name
);
294 return ((SHELL_VAR
*)NULL
);
297 entry
= find_variable (vname
);
298 entry
= assign_array_element_internal (entry
, name
, vname
, sub
, sublen
, value
, flags
);
305 assign_array_element_internal (entry
, name
, vname
, sub
, sublen
, value
, flags
)
307 char *name
; /* only used for error messages */
317 if (entry
&& assoc_p (entry
))
319 sub
[sublen
-1] = '\0';
320 akey
= expand_assignment_string_to_string (sub
, 0); /* [ */
322 if (akey
== 0 || *akey
== 0)
324 err_badarraysub (name
);
326 return ((SHELL_VAR
*)NULL
);
328 entry
= bind_assoc_variable (entry
, vname
, akey
, value
, flags
);
332 ind
= array_expand_index (entry
, sub
, sublen
);
333 /* negative subscripts to indexed arrays count back from end */
334 if (entry
&& ind
< 0)
335 ind
= (array_p (entry
) ? array_max_index (array_cell (entry
)) : 0) + 1 + ind
;
338 err_badarraysub (name
);
339 return ((SHELL_VAR
*)NULL
);
341 entry
= bind_array_variable (vname
, ind
, value
, flags
);
347 /* Find the array variable corresponding to NAME. If there is no variable,
348 create a new array variable. If the variable exists but is not an array,
349 convert it to an indexed array. If FLAGS&1 is non-zero, an existing
350 variable is checked for the readonly or noassign attribute in preparation
351 for assignment (e.g., by the `read' builtin). If FLAGS&2 is non-zero, we
352 create an associative array. */
354 find_or_make_array_variable (name
, flags
)
360 var
= find_variable (name
);
363 /* See if we have a nameref pointing to a variable that hasn't been
365 var
= find_variable_last_nameref (name
, 1);
366 if (var
&& nameref_p (var
) && invisible_p (var
))
368 internal_warning (_("%s: removing nameref attribute"), name
);
369 VUNSETATTR (var
, att_nameref
);
371 if (var
&& nameref_p (var
))
373 if (valid_nameref_value (nameref_cell (var
), 2) == 0)
375 sh_invalidid (nameref_cell (var
));
376 return ((SHELL_VAR
*)NULL
);
378 var
= (flags
& 2) ? make_new_assoc_variable (nameref_cell (var
)) : make_new_array_variable (nameref_cell (var
));
383 var
= (flags
& 2) ? make_new_assoc_variable (name
) : make_new_array_variable (name
);
384 else if ((flags
& 1) && (readonly_p (var
) || noassign_p (var
)))
386 if (readonly_p (var
))
388 return ((SHELL_VAR
*)NULL
);
390 else if ((flags
& 2) && array_p (var
))
392 last_command_exit_value
= 1;
393 report_error (_("%s: cannot convert indexed to associative array"), name
);
394 return ((SHELL_VAR
*)NULL
);
396 else if (array_p (var
) == 0 && assoc_p (var
) == 0)
397 var
= convert_var_to_array (var
);
402 /* Perform a compound assignment statement for array NAME, where VALUE is
403 the text between the parens: NAME=( VALUE ) */
405 assign_array_from_string (name
, value
, flags
)
413 if (flags
& ASS_MKASSOC
)
416 var
= find_or_make_array_variable (name
, vflags
);
418 return ((SHELL_VAR
*)NULL
);
420 return (assign_array_var_from_string (var
, value
, flags
));
423 /* Sequentially assign the indices of indexed array variable VAR from the
426 assign_array_var_from_word_list (var
, list
, flags
)
431 register arrayind_t i
;
432 register WORD_LIST
*l
;
435 a
= array_cell (var
);
436 i
= (flags
& ASS_APPEND
) ? array_max_index (a
) + 1 : 0;
438 for (l
= list
; l
; l
= l
->next
, i
++)
439 bind_array_var_internal (var
, i
, 0, l
->word
->word
, flags
& ~ASS_APPEND
);
441 VUNSETATTR (var
, att_invisible
); /* no longer invisible */
447 expand_compound_array_assignment (var
, value
, flags
)
452 WORD_LIST
*list
, *nlist
;
453 WORD_LIST
*hd
, *tl
, *t
, *n
;
457 /* This condition is true when invoked from the declare builtin with a
459 declare -a d='([1]="" [2]="bdef" [5]="hello world" "test")' */
460 if (*value
== '(') /*)*/
463 val
= extract_array_assignment_list (value
, &ni
);
465 return (WORD_LIST
*)NULL
;
470 /* Expand the value string into a list of words, performing all the
471 shell expansions including pathname generation and word splitting. */
472 /* First we split the string on whitespace, using the shell parser
473 (ksh93 seems to do this). */
474 list
= parse_string_to_word_list (val
, 1, "array assign");
476 if (var
&& assoc_p (var
))
483 /* If we're using [subscript]=value, we need to quote each [ and ] to
484 prevent unwanted filename expansion. This doesn't need to be done
485 for associative array expansion, since that uses a different expansion
486 function (see assign_compound_array_list below). */
488 quote_array_assignment_chars (list
);
490 /* Now that we've split it, perform the shell expansions on each
492 nlist
= list
? expand_words_no_vars (list
) : (WORD_LIST
*)NULL
;
494 dispose_words (list
);
502 /* Callers ensure that VAR is not NULL */
504 assign_compound_array_list (var
, nlist
, flags
)
512 char *w
, *val
, *nval
, *savecmd
;
513 int len
, iflags
, free_val
;
514 arrayind_t ind
, last_ind
;
517 a
= (var
&& array_p (var
)) ? array_cell (var
) : (ARRAY
*)0;
518 h
= (var
&& assoc_p (var
)) ? assoc_cell (var
) : (HASH_TABLE
*)0;
523 /* Now that we are ready to assign values to the array, kill the existing
525 if ((flags
& ASS_APPEND
) == 0)
527 if (a
&& array_p (var
))
529 else if (h
&& assoc_p (var
))
533 last_ind
= (a
&& (flags
& ASS_APPEND
)) ? array_max_index (a
) + 1 : 0;
535 for (list
= nlist
; list
; list
= list
->next
)
537 /* Don't allow var+=(values) to make assignments in VALUES append to
538 existing values by default. */
539 iflags
= flags
& ~ASS_APPEND
;
540 w
= list
->word
->word
;
542 /* We have a word of the form [ind]=value */
543 if ((list
->word
->flags
& W_ASSIGNMENT
) && w
[0] == '[')
545 /* Don't have to handle embedded quotes specially any more, since
546 associative array subscripts have not been expanded yet (see
548 len
= skipsubscript (w
, 0, 0);
550 /* XXX - changes for `+=' */
551 if (w
[len
] != ']' || (w
[len
+1] != '=' && (w
[len
+1] != '+' || w
[len
+2] != '=')))
558 nval
= make_variable_value (var
, w
, flags
);
559 if (var
->assign_func
)
560 (*var
->assign_func
) (var
, nval
, last_ind
, 0);
562 array_insert (a
, last_ind
, nval
);
574 if (ALL_ELEMENT_SUB (w
[1]) && len
== 2)
576 last_command_exit_value
= 1;
578 report_error (_("%s: invalid associative array key"), w
);
580 report_error (_("%s: cannot assign to non-numeric index"), w
);
586 ind
= array_expand_index (var
, w
+ 1, len
);
587 /* negative subscripts to indexed arrays count back from end */
589 ind
= array_max_index (array_cell (var
)) + 1 + ind
;
598 else if (assoc_p (var
))
600 /* This is not performed above, see expand_compound_array_assignment */
602 akey
= expand_assignment_string_to_string (w
+1, 0);
604 /* And we need to expand the value also, see below */
605 if (akey
== 0 || *akey
== 0)
613 /* XXX - changes for `+=' -- just accept the syntax. ksh93 doesn't do this */
614 if (w
[len
+ 1] == '+' && w
[len
+ 2] == '=')
616 iflags
|= ASS_APPEND
;
622 else if (assoc_p (var
))
624 last_command_exit_value
= 1;
625 report_error (_("%s: %s: must use subscript when assigning associative array"), var
->name
, w
);
628 else /* No [ind]=value, just a stray `=' */
635 /* See above; we need to expand the value here */
638 val
= expand_assignment_string_to_string (val
, 0);
641 val
= (char *)xmalloc (1);
642 val
[0] = '\0'; /* like do_assignment_internal */
647 savecmd
= this_command_name
;
649 this_command_name
= (char *)NULL
; /* no command name for errors */
650 bind_array_var_internal (var
, ind
, akey
, val
, iflags
);
652 this_command_name
= savecmd
;
659 /* Perform a compound array assignment: VAR->name=( VALUE ). The
660 VALUE has already had the parentheses stripped. */
662 assign_array_var_from_string (var
, value
, flags
)
672 nlist
= expand_compound_array_assignment (var
, value
, flags
);
673 assign_compound_array_list (var
, nlist
, flags
);
676 dispose_words (nlist
);
679 VUNSETATTR (var
, att_invisible
); /* no longer invisible */
684 /* Quote globbing chars and characters in $IFS before the `=' in an assignment
685 statement (usually a compound array assignment) to protect them from
686 unwanted filename expansion or word splitting. */
688 quote_assign (string
)
693 char *temp
, *t
, *subs
;
694 const char *s
, *send
;
698 slen
= strlen (string
);
699 send
= string
+ slen
;
701 t
= temp
= (char *)xmalloc (slen
* 2 + 1);
703 for (s
= string
; *s
; )
707 if (saw_eq
== 0 && *s
== '[') /* looks like a subscript */
710 se
= skipsubscript (string
, ss
, 0);
711 subs
= substring (s
, ss
, se
);
721 if (saw_eq
== 0 && (glob_char_p (s
) || isifs (*s
)))
724 COPY_CHAR_P (t
, s
, send
);
730 /* For each word in a compound array assignment, if the word looks like
731 [ind]=value, quote globbing chars and characters in $IFS before the `='. */
733 quote_array_assignment_chars (list
)
739 for (l
= list
; l
; l
= l
->next
)
741 if (l
->word
== 0 || l
->word
->word
== 0 || l
->word
->word
[0] == '\0')
742 continue; /* should not happen, but just in case... */
743 /* Don't bother if it hasn't been recognized as an assignment or
744 doesn't look like [ind]=value */
745 if ((l
->word
->flags
& W_ASSIGNMENT
) == 0)
747 if (l
->word
->word
[0] != '[' || mbschr (l
->word
->word
, '=') == 0) /* ] */
750 nword
= quote_assign (l
->word
->word
);
751 free (l
->word
->word
);
752 l
->word
->word
= nword
;
753 l
->word
->flags
|= W_NOGLOB
; /* XXX - W_NOSPLIT also? */
757 /* skipsubscript moved to subst.c to use private functions. 2009/02/24. */
759 /* This function is called with SUB pointing to just after the beginning
760 `[' of an array subscript and removes the array element to which SUB
761 expands from array VAR. A subscript of `*' or `@' unsets the array. */
763 unbind_array_element (var
, sub
)
772 len
= skipsubscript (sub
, 0, (var
&& assoc_p(var
)));
773 if (sub
[len
] != ']' || len
== 0)
775 builtin_error ("%s[%s: %s", var
->name
, sub
, _(bash_badsub_errmsg
));
780 if (ALL_ELEMENT_SUB (sub
[0]) && sub
[1] == 0)
782 if (array_p (var
) || assoc_p (var
))
784 unbind_variable (var
->name
); /* XXX -- {array,assoc}_flush ? */
788 return -2; /* don't allow this to unset scalar variables */
793 akey
= expand_assignment_string_to_string (sub
, 0); /* [ */
794 if (akey
== 0 || *akey
== 0)
796 builtin_error ("[%s]: %s", sub
, _(bash_badsub_errmsg
));
800 assoc_remove (assoc_cell (var
), akey
);
803 else if (array_p (var
))
805 ind
= array_expand_index (var
, sub
, len
+1);
806 /* negative subscripts to indexed arrays count back from end */
808 ind
= array_max_index (array_cell (var
)) + 1 + ind
;
811 builtin_error ("[%s]: %s", sub
, _(bash_badsub_errmsg
));
814 ae
= array_remove (array_cell (var
), ind
);
816 array_dispose_element (ae
);
818 else /* array_p (var) == 0 && assoc_p (var) == 0 */
820 akey
= this_command_name
;
821 ind
= array_expand_index (var
, sub
, len
+1);
822 this_command_name
= akey
;
825 unbind_variable (var
->name
);
829 return -2; /* any subscript other than 0 is invalid with scalar variables */
835 /* Format and output an array assignment in compound form VAR=(VALUES),
836 suitable for re-use as input. */
838 print_array_assignment (var
, quoted
)
844 vstr
= array_to_assign (array_cell (var
), quoted
);
847 printf ("%s=%s\n", var
->name
, quoted
? "'()'" : "()");
850 printf ("%s=%s\n", var
->name
, vstr
);
855 /* Format and output an associative array assignment in compound form
856 VAR=(VALUES), suitable for re-use as input. */
858 print_assoc_assignment (var
, quoted
)
864 vstr
= assoc_to_assign (assoc_cell (var
), quoted
);
867 printf ("%s=%s\n", var
->name
, quoted
? "'()'" : "()");
870 printf ("%s=%s\n", var
->name
, vstr
);
875 /***********************************************************************/
877 /* Utility functions to manage arrays and their contents for expansion */
879 /***********************************************************************/
881 /* Return 1 if NAME is a properly-formed array reference v[sub]. */
883 valid_array_reference (name
, flags
)
890 t
= mbschr (name
, '['); /* ] */
894 r
= legal_identifier (name
);
898 /* Check for a properly-terminated non-blank subscript. */
899 len
= skipsubscript (t
, 0, 0);
900 if (t
[len
] != ']' || len
== 1)
902 if (t
[len
+1] != '\0')
904 for (r
= 1; r
< len
; r
++)
905 if (whitespace (t
[r
]) == 0)
912 /* Expand the array index beginning at S and extending LEN characters. */
914 array_expand_index (var
, s
, len
)
919 char *exp
, *t
, *savecmd
;
923 exp
= (char *)xmalloc (len
);
924 strncpy (exp
, s
, len
- 1);
926 t
= expand_arith_string (exp
, Q_DOUBLE_QUOTES
|Q_ARITH
|Q_ARRAYSUB
); /* XXX - Q_ARRAYSUB for future use */
927 savecmd
= this_command_name
;
928 this_command_name
= (char *)NULL
;
929 val
= evalexp (t
, &expok
);
930 this_command_name
= savecmd
;
935 last_command_exit_value
= EXECUTION_FAILURE
;
937 if (no_longjmp_on_fatal_error
)
939 top_level_cleanup ();
940 jump_to_top_level (DISCARD
);
945 /* Return the name of the variable specified by S without any subscript.
946 If SUBP is non-null, return a pointer to the start of the subscript
947 in *SUBP. If LENP is non-null, the length of the subscript is returned
948 in *LENP. This returns newly-allocated memory. */
950 array_variable_name (s
, subp
, lenp
)
965 return ((char *)NULL
);
968 ni
= skipsubscript (s
, ind
, 0);
969 if (ni
<= ind
+ 1 || s
[ni
] != ']')
976 return ((char *)NULL
);
980 ret
= savestring (s
);
991 /* Return the variable specified by S without any subscript. If SUBP is
992 non-null, return a pointer to the start of the subscript in *SUBP.
993 If LENP is non-null, the length of the subscript is returned in *LENP. */
995 array_variable_part (s
, subp
, lenp
)
1003 t
= array_variable_name (s
, subp
, lenp
);
1005 return ((SHELL_VAR
*)NULL
);
1006 var
= find_variable (t
); /* XXX - handle namerefs here? */
1009 return var
; /* now return invisible variables; caller must handle */
1012 #define INDEX_ERROR() \
1016 err_badarraysub (var->name); \
1020 err_badarraysub (s); \
1021 t[-1] = '['; /* ] */\
1023 return ((char *)NULL); \
1027 /* Return a string containing the elements in the array and subscript
1028 described by S. If the subscript is * or @, obeys quoting rules akin
1029 to the expansion of $* and $@ including double quoting. If RTYPE
1030 is non-null it gets 1 if the array reference is name[*], 2 if the
1031 reference is name[@], and 0 otherwise. */
1033 array_value_internal (s
, quoted
, flags
, rtype
, indp
)
1035 int quoted
, flags
, *rtype
;
1041 char *retval
, *t
, *temp
;
1045 var
= array_variable_part (s
, &t
, &len
);
1047 /* Expand the index, even if the variable doesn't exist, in case side
1048 effects are needed, like ${w[i++]} where w is unset. */
1051 return (char *)NULL
;
1055 return ((char *)NULL
); /* error message already printed */
1059 if (ALL_ELEMENT_SUB (t
[0]) && t
[1] == ']')
1062 *rtype
= (t
[0] == '*') ? 1 : 2;
1063 if ((flags
& AV_ALLOWALL
) == 0)
1065 err_badarraysub (s
);
1066 return ((char *)NULL
);
1068 else if (var
== 0 || value_cell (var
) == 0) /* XXX - check for invisible_p(var) ? */
1069 return ((char *)NULL
);
1070 else if (array_p (var
) == 0 && assoc_p (var
) == 0)
1071 l
= add_string_to_list (value_cell (var
), (WORD_LIST
*)NULL
);
1072 else if (assoc_p (var
))
1074 l
= assoc_to_word_list (assoc_cell (var
));
1075 if (l
== (WORD_LIST
*)NULL
)
1076 return ((char *)NULL
);
1080 l
= array_to_word_list (array_cell (var
));
1081 if (l
== (WORD_LIST
*)NULL
)
1082 return ((char *) NULL
);
1085 if (t
[0] == '*' && (quoted
& (Q_HERE_DOCUMENT
|Q_DOUBLE_QUOTES
)))
1087 temp
= string_list_dollar_star (l
);
1088 retval
= quote_string (temp
); /* XXX - leak here */
1091 else /* ${name[@]} or unquoted ${name[*]} */
1092 /* XXX - bash-4.4/bash-5.0 test AV_ASSIGNRHS and pass PF_ASSIGNRHS */
1093 retval
= string_list_dollar_at (l
, quoted
, (flags
& AV_ASSIGNRHS
) ? PF_ASSIGNRHS
: 0); /* XXX - leak here */
1101 if (var
== 0 || array_p (var
) || assoc_p (var
) == 0)
1103 if ((flags
& AV_USEIND
) == 0 || indp
== 0)
1105 ind
= array_expand_index (var
, t
, len
);
1108 /* negative subscripts to indexed arrays count back from end */
1109 if (var
&& array_p (var
))
1110 ind
= array_max_index (array_cell (var
)) + 1 + ind
;
1120 else if (assoc_p (var
))
1123 akey
= expand_assignment_string_to_string (t
, 0); /* [ */
1125 if (akey
== 0 || *akey
== 0)
1132 if (var
== 0 || value_cell (var
) == 0) /* XXX - check invisible_p(var) ? */
1135 return ((char *)NULL
);
1137 if (array_p (var
) == 0 && assoc_p (var
) == 0)
1138 return (ind
== 0 ? value_cell (var
) : (char *)NULL
);
1139 else if (assoc_p (var
))
1141 retval
= assoc_reference (assoc_cell (var
), akey
);
1145 retval
= array_reference (array_cell (var
), ind
);
1151 /* Return a string containing the elements described by the array and
1152 subscript contained in S, obeying quoting for subscripts * and @. */
1154 array_value (s
, quoted
, flags
, rtype
, indp
)
1156 int quoted
, flags
, *rtype
;
1159 return (array_value_internal (s
, quoted
, flags
|AV_ALLOWALL
, rtype
, indp
));
1162 /* Return the value of the array indexing expression S as a single string.
1163 If (FLAGS & AV_ALLOWALL) is 0, do not allow `@' and `*' subscripts. This
1164 is used by other parts of the shell such as the arithmetic expression
1165 evaluator in expr.c. */
1167 get_array_value (s
, flags
, rtype
, indp
)
1172 return (array_value_internal (s
, 0, flags
, rtype
, indp
));
1176 array_keys (s
, quoted
)
1181 char *retval
, *t
, *temp
;
1185 var
= array_variable_part (s
, &t
, &len
);
1188 if (var
== 0 || ALL_ELEMENT_SUB (t
[0]) == 0 || t
[1] != ']')
1189 return (char *)NULL
;
1191 if (var_isset (var
) == 0 || invisible_p (var
))
1192 return (char *)NULL
;
1194 if (array_p (var
) == 0 && assoc_p (var
) == 0)
1195 l
= add_string_to_list ("0", (WORD_LIST
*)NULL
);
1196 else if (assoc_p (var
))
1197 l
= assoc_keys_to_word_list (assoc_cell (var
));
1199 l
= array_keys_to_word_list (array_cell (var
));
1200 if (l
== (WORD_LIST
*)NULL
)
1201 return ((char *) NULL
);
1203 if (t
[0] == '*' && (quoted
& (Q_HERE_DOCUMENT
|Q_DOUBLE_QUOTES
)))
1205 temp
= string_list_dollar_star (l
);
1206 retval
= quote_string (temp
);
1209 else /* ${!name[@]} or unquoted ${!name[*]} */
1210 retval
= string_list_dollar_at (l
, quoted
, 0);
1215 #endif /* ARRAY_VARS */