1 /* Virtual array support.
2 Copyright (C) 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
3 Contributed by Cygnus Solutions.
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it
8 under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
12 GCC is distributed in the hope that it will be useful, but WITHOUT
13 ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
14 or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
15 License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING. If not, write to the Free
19 the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
20 MA 02111-1307, USA. */
30 #define VARRAY_HDR_SIZE (sizeof (struct varray_head_tag) - sizeof (varray_data))
32 /* Allocate a virtual array with NUM_ELEMENT elements, each of which is
33 ELEMENT_SIZE bytes long, named NAME. Array elements are zeroed. */
35 varray_init (num_elements
, element_size
, name
)
40 size_t data_size
= num_elements
* element_size
;
41 varray_type ptr
= (varray_type
) xcalloc (VARRAY_HDR_SIZE
+ data_size
, 1);
43 ptr
->num_elements
= num_elements
;
44 ptr
->elements_used
= 0;
45 ptr
->element_size
= element_size
;
50 /* Grow/shrink the virtual array VA to N elements. Zero any new elements
57 size_t old_elements
= va
->num_elements
;
59 if (n
!= old_elements
)
61 size_t element_size
= va
->element_size
;
62 size_t old_data_size
= old_elements
* element_size
;
63 size_t data_size
= n
* element_size
;
65 va
= (varray_type
) xrealloc ((char *)va
, VARRAY_HDR_SIZE
+ data_size
);
68 memset (&va
->data
.c
[old_data_size
], 0, data_size
- old_data_size
);
74 /* Check the bounds of a varray access. */
76 #if defined ENABLE_CHECKING && (GCC_VERSION >= 2007)
78 extern void error
PARAMS ((const char *, ...)) ATTRIBUTE_PRINTF_1
;
81 varray_check_failed (va
, n
, file
, line
, function
)
88 internal_error ("virtual array %s[%lu]: element %lu out of bounds in %s, at %s:%d",
89 va
->name
, (unsigned long) va
->num_elements
, (unsigned long) n
,
90 function
, trim_filename (file
), line
);