3 * File name: ir/adt/array.h
4 * Purpose: Declarations for Array.
5 * Author: Markus Armbruster
7 * Created: 1999 by getting from fiasco
9 * Copyright: (c) 1995, 1996 Markus Armbruster
10 * Licence: This file protected by GPL - GNU GENERAL PUBLIC LICENSE.
13 /* @@@ growing a dynamic on an obstack */
25 /* Flexible create / delete */
26 #define NEW_ARR_F(type, nelts) \
27 (XMALLOC_TRACE (type *)_new_arr_f ((nelts), sizeof(type) * (nelts)))
28 #define CLONE_ARR_F(type, arr) \
29 NEW_ARR_F (type, ARR_LEN ((arr)))
30 #define DUP_ARR_F(type, arr) \
31 memcpy (CLONE_ARR_F (type, (arr)), (arr), sizeof(type) * ARR_LEN((arr)))
32 #define DEL_ARR_F(arr) (XMALLOC_TRACE _del_arr_f ((arr)))
34 /* Dynamic create on obstacks */
35 #define NEW_ARR_D(type, obstack, nelts) \
37 ? (type *)_new_arr_d ((obstack), (nelts), sizeof(type) * (nelts)) \
38 : (type *)arr_mt_descr.v.elts)
39 #define CLONE_ARR_D(type, obstack, arr) \
40 NEW_ARR_D (type, (obstack), ARR_LEN ((arr)))
41 #define DUP_ARR_D(type, obstack, arr) \
42 memcpy (CLONE_ARR_D (type, (obstack), (arr)), (arr), sizeof(type) * ARR_LEN ((arr)))
44 /* Automatic create; delete is automatic at return from function */
46 #define NEW_ARR_A(type, var, n) \
49 assert (_nelts >= 0); \
50 (var) = (void *)((_arr_descr *)alloca (_ARR_ELTS_OFFS + sizeof(type) * _nelts))->v.elts; \
51 _ARR_SET_DBGINF (_ARR_DESCR ((var)), ARR_A_MAGIC, sizeof (type)); \
52 (void)(_ARR_DESCR ((var))->nelts = _nelts); \
54 #define CLONE_ARR_A(type, var, arr) \
55 NEW_ARR_A (type, (var), ARR_LEN ((arr)))
57 #define DUP_ARR_A(type, var, arr) \
58 do { CLONE_ARR_A(type, (var), (arr)); \
59 memcpy ((var), (arr), sizeof (type) * ARR_LEN ((arr))); } \
62 /* Declare an initialized array of fixed size */
63 #define DECL_ARR_S(type, var, _nelts) \
64 ARR_STRUCT(type, (_nelts) ? (_nelts) : 1) _##var; \
65 type *var = (_ARR_SET_DBGINF (&_##var, ARR_A_MAGIC, sizeof (type)), \
66 _##var.nelts = _nelts, \
70 #define ARR_LEN(arr) (ARR_VRFY ((arr)), _ARR_DESCR((arr))->nelts)
73 Applicable to flexibles only, change arr which must be an lvalue. */
74 /* resize arr to hold n elts */
75 #define ARR_RESIZE(type, arr, n) \
76 (XMALLOC_TRACE (arr) = _arr_resize ((arr), (n), sizeof(type)))
77 /* resize arr to hold exactly n elts */
78 #define ARR_SETLEN(type, arr, n) \
79 (XMALLOC_TRACE (arr) = _arr_setlen ((arr), (n), sizeof(type) * (n)))
80 /* resize arr by delta elts */
81 #define ARR_EXTEND(type, arr, delta) \
82 ARR_RESIZE (type, (arr), ARR_LEN ((arr)) + (delta))
83 /* resize arr to hold n elts only if it is currently shorter */
84 #define ARR_EXTO(type, arr, n) \
85 ((n) >= ARR_LEN ((arr)) ? ARR_RESIZE (type, (arr), (n)+1) : (arr))
86 /* append one elt to arr */
87 #define ARR_APP1(type, arr, elt) \
88 (ARR_EXTEND (type, (arr), 1), (arr)[ARR_LEN ((arr))-1] = (elt))
92 # define ARR_VRFY(arr) ((void)0)
93 # define ARR_IDX_VRFY(arr, idx) ((void)0)
95 # define ARR_VRFY(arr) \
96 assert ( ( (_ARR_DESCR((arr))->cookie == ARR_D_MAGIC) \
97 || (_ARR_DESCR((arr))->cookie == ARR_A_MAGIC) \
98 || (_ARR_DESCR((arr))->cookie == ARR_F_MAGIC)) \
99 && ( (_ARR_DESCR((arr))->cookie != ARR_F_MAGIC) \
100 || (_ARR_DESCR((arr))->u.allocated >= _ARR_DESCR((arr))->nelts)) \
101 && (_ARR_DESCR((arr))->nelts >= 0))
102 # define ARR_IDX_VRFY(arr, idx) \
103 assert ((0 <= (idx)) && ((idx) < ARR_LEN ((arr))))
108 Don't try this at home, kids, we're trained professionals ;->
109 ... or at the IPD, either. */
111 # define _ARR_DBGINF_DECL
112 # define _ARR_SET_DBGINF(descr, co, es) ((co), (es))
114 # define _ARR_DBGINF_DECL int cookie; size_t eltsize;
115 # define _ARR_SET_DBGINF(descr, co, es) \
116 ((descr)->cookie = (co), (descr)->eltsize = (es))
119 #define ARR_STRUCT(type, _nelts) \
123 struct obstack *obstack; /* dynamic: allocated on this obstack */ \
124 int allocated; /* flexible: #slots allocated */ \
128 type elts[(_nelts)]; \
129 aligned_type align[1]; \
133 typedef ARR_STRUCT (aligned_type, 1) _arr_descr;
135 extern _arr_descr arr_mt_descr;
137 void *_new_arr_f (int, size_t);
138 void _del_arr_f (void *);
139 void *_new_arr_d (struct obstack *, int, size_t);
140 void *_arr_resize (void *, int, size_t);
141 void *_arr_setlen (void *, int, size_t);
143 #define _ARR_ELTS_OFFS offsetof (_arr_descr, v.elts)
144 #define _ARR_DESCR(elts) ((_arr_descr *)(void *)((char *)(elts) - _ARR_ELTS_OFFS))