1 /* Virtual array support.
2 Copyright (C) 1998, 1999, 2000, 2001, 2002 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);