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array.h
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array.h
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/* array.h -- definitions for the interface exported by array.c that allows
the rest of the shell to manipulate array variables. */
/* Copyright (C) 1997-2009 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/>.
*/
#ifndef _ARRAY_H_
#define _ARRAY_H_
#include "stdc.h"
typedef intmax_t arrayind_t;
enum atype {array_indexed, array_assoc};
typedef struct array {
enum atype type;
arrayind_t max_index;
int num_elements;
struct array_element *head;
} ARRAY;
typedef struct array_element {
arrayind_t ind;
char *value;
struct array_element *next, *prev;
} ARRAY_ELEMENT;
typedef int sh_ae_map_func_t __P((ARRAY_ELEMENT *, void *));
/* Basic operations on entire arrays */
extern ARRAY *array_create __P((void));
extern void array_flush __P((ARRAY *));
extern void array_dispose __P((ARRAY *));
extern ARRAY *array_copy __P((ARRAY *));
extern ARRAY *array_slice __P((ARRAY *, ARRAY_ELEMENT *, ARRAY_ELEMENT *));
extern void array_walk __P((ARRAY *, sh_ae_map_func_t *, void *));
extern ARRAY_ELEMENT *array_shift __P((ARRAY *, int, int));
extern int array_rshift __P((ARRAY *, int, char *));
extern ARRAY_ELEMENT *array_unshift_element __P((ARRAY *));
extern int array_shift_element __P((ARRAY *, char *));
extern ARRAY *array_quote __P((ARRAY *));
extern ARRAY *array_quote_escapes __P((ARRAY *));
extern ARRAY *array_dequote __P((ARRAY *));
extern ARRAY *array_dequote_escapes __P((ARRAY *));
extern ARRAY *array_remove_quoted_nulls __P((ARRAY *));
extern char *array_subrange __P((ARRAY *, arrayind_t, arrayind_t, int, int));
extern char *array_patsub __P((ARRAY *, char *, char *, int));
extern char *array_modcase __P((ARRAY *, char *, int, int));
/* Basic operations on array elements. */
extern ARRAY_ELEMENT *array_create_element __P((arrayind_t, char *));
extern ARRAY_ELEMENT *array_copy_element __P((ARRAY_ELEMENT *));
extern void array_dispose_element __P((ARRAY_ELEMENT *));
extern int array_insert __P((ARRAY *, arrayind_t, char *));
extern ARRAY_ELEMENT *array_remove __P((ARRAY *, arrayind_t));
extern char *array_reference __P((ARRAY *, arrayind_t));
/* Converting to and from arrays */
extern WORD_LIST *array_to_word_list __P((ARRAY *));
extern ARRAY *array_from_word_list __P((WORD_LIST *));
extern WORD_LIST *array_keys_to_word_list __P((ARRAY *));
extern ARRAY *array_assign_list __P((ARRAY *, WORD_LIST *));
extern char **array_to_argv __P((ARRAY *));
extern char *array_to_assign __P((ARRAY *, int));
extern char *array_to_string __P((ARRAY *, char *, int));
extern ARRAY *array_from_string __P((char *, char *));
/* Flags for array_shift */
#define AS_DISPOSE 0x01
#define array_num_elements(a) ((a)->num_elements)
#define array_max_index(a) ((a)->max_index)
#define array_head(a) ((a)->head)
#define array_empty(a) ((a)->num_elements == 0)
#define element_value(ae) ((ae)->value)
#define element_index(ae) ((ae)->ind)
#define element_forw(ae) ((ae)->next)
#define element_back(ae) ((ae)->prev)
/* Convenience */
#define array_push(a,v) \
do { array_rshift ((a), 1, (v)); } while (0)
#define array_pop(a) \
do { array_dispose_element (array_shift ((a), 1, 0)); } while (0)
#define GET_ARRAY_FROM_VAR(n, v, a) \
do { \
(v) = find_variable (n); \
(a) = ((v) && array_p ((v))) ? array_cell (v) : (ARRAY *)0; \
} while (0)
#define ALL_ELEMENT_SUB(c) ((c) == '@' || (c) == '*')
#endif /* _ARRAY_H_ */