array.h

   1 /* array.h -- definitions for the interface exported by array.c that allows
   2    the rest of the shell to manipulate array variables. */
   3
   4 /* Copyright (C) 1997-2009 Free Software Foundation, Inc.
   5
   6    This file is part of GNU Bash, the Bourne Again SHell.
   7
   8    Bash is free software: you can redistribute it and/or modify
   9    it under the terms of the GNU General Public License as published by
  10    the Free Software Foundation, either version 3 of the License, or
  11    (at your option) any later version.
  12
  13    Bash is distributed in the hope that it will be useful,
  14    but WITHOUT ANY WARRANTY; without even the implied warranty of
  15    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16    GNU General Public License for more details.
  17
  18    You should have received a copy of the GNU General Public License
  19    along with Bash.  If not, see <http://www.gnu.org/licenses/>.
  20 */
  21
  22
  23 #ifndef _ARRAY_H_
  24 #define _ARRAY_H_
  25
  26 #include "stdc.h"
  27
  28 typedef intmax_t        arrayind_t;
  29
  30 enum atype {array_indexed, array_assoc};
  31
  32 typedef struct array {
  33         enum atype      type;
  34         arrayind_t      max_index, num_elements;
  35         struct array_element *head;
  36 } ARRAY;
  37
  38 typedef struct array_element {
  39         arrayind_t      ind;
  40         char    *value;
  41         struct array_element *next, *prev;
  42 } ARRAY_ELEMENT;
  43
  44 typedef int sh_ae_map_func_t __P((ARRAY_ELEMENT *, void *));
  45
  46 /* Basic operations on entire arrays */
  47 extern ARRAY    *array_create __P((void));
  48 extern void     array_flush __P((ARRAY *));
  49 extern void     array_dispose __P((ARRAY *));
  50 extern ARRAY    *array_copy __P((ARRAY *));
  51 extern ARRAY    *array_slice __P((ARRAY *, ARRAY_ELEMENT *, ARRAY_ELEMENT *));
  52 extern void     array_walk __P((ARRAY   *, sh_ae_map_func_t *, void *));
  53
  54 extern ARRAY_ELEMENT *array_shift __P((ARRAY *, int, int));
  55 extern int      array_rshift __P((ARRAY *, int, char *));
  56 extern ARRAY_ELEMENT *array_unshift_element __P((ARRAY *));
  57 extern int      array_shift_element __P((ARRAY *, char *));
  58
  59 extern ARRAY    *array_quote __P((ARRAY *));
  60 extern ARRAY    *array_quote_escapes __P((ARRAY *));
  61 extern ARRAY    *array_dequote __P((ARRAY *));
  62 extern ARRAY    *array_dequote_escapes __P((ARRAY *));
  63 extern ARRAY    *array_remove_quoted_nulls __P((ARRAY *));
  64
  65 extern char     *array_subrange __P((ARRAY *, arrayind_t, arrayind_t, int, int));
  66 extern char     *array_patsub __P((ARRAY *, char *, char *, int));
  67 extern char     *array_modcase __P((ARRAY *, char *, int, int));
  68
  69 /* Basic operations on array elements. */
  70 extern ARRAY_ELEMENT *array_create_element __P((arrayind_t, char *));
  71 extern ARRAY_ELEMENT *array_copy_element __P((ARRAY_ELEMENT *));
  72 extern void     array_dispose_element __P((ARRAY_ELEMENT *));
  73
  74 extern int      array_insert __P((ARRAY *, arrayind_t, char *));
  75 extern ARRAY_ELEMENT *array_remove __P((ARRAY *, arrayind_t));
  76 extern char     *array_reference __P((ARRAY *, arrayind_t));
  77
  78 /* Converting to and from arrays */
  79 extern WORD_LIST *array_to_word_list __P((ARRAY *));
  80 extern ARRAY *array_from_word_list __P((WORD_LIST *));
  81 extern WORD_LIST *array_keys_to_word_list __P((ARRAY *));
  82
  83 extern ARRAY *array_assign_list __P((ARRAY *, WORD_LIST *));
  84
  85 extern char **array_to_argv __P((ARRAY *));
  86
  87 extern char *array_to_assign __P((ARRAY *, int));
  88 extern char *array_to_string __P((ARRAY *, char *, int));
  89 extern ARRAY *array_from_string __P((char *, char *));
  90
  91 /* Flags for array_shift */
  92 #define AS_DISPOSE      0x01
  93
  94 #define array_num_elements(a)   ((a)->num_elements)
  95 #define array_max_index(a)      ((a)->max_index)
  96 #define array_head(a)           ((a)->head)
  97 #define array_empty(a)          ((a)->num_elements == 0)
  98
  99 #define element_value(ae)       ((ae)->value)
 100 #define element_index(ae)       ((ae)->ind)
 101 #define element_forw(ae)        ((ae)->next)
 102 #define element_back(ae)        ((ae)->prev)
 103
 104 /* Convenience */
 105 #define array_push(a,v) \
 106   do { array_rshift ((a), 1, (v)); } while (0)
 107 #define array_pop(a) \
 108   do { array_dispose_element (array_shift ((a), 1, 0)); } while (0)
 109
 110 #define GET_ARRAY_FROM_VAR(n, v, a) \
 111   do { \
 112     (v) = find_variable (n); \
 113     (a) = ((v) && array_p ((v))) ? array_cell (v) : (ARRAY *)0; \
 114   } while (0)
 115
 116 #define ALL_ELEMENT_SUB(c)      ((c) == '@' || (c) == '*')
 117
 118 #endif /* _ARRAY_H_ */