allow all arm targets to use -mstructure-size-boundary=XX
[official-gcc.git] / gcc / dyn-string.c
blob704629d253b1fc7ab52bdc38fa06730f0c05792b
1 /* An abstract string datatype.
2 Copyright (C) 1998, 1999 Free Software Foundation, Inc.
3 Contributed by Mark Mitchell (mark@markmitchell.com).
5 This file is part of GNU CC.
7 GNU CC is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2, or (at your option)
10 any later version.
12 GNU CC is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU CC; see the file COPYING. If not, write to
19 the Free Software Foundation, 59 Temple Place - Suite 330,
20 Boston, MA 02111-1307, USA. */
23 #include "config.h"
24 #include "system.h"
25 #include "dyn-string.h"
27 /* Create a new dynamic string capable of holding at least SPACE characters,
28 including the terminating NUL. If SPACE is 0, it will be silently
29 increased to 1. */
31 dyn_string_t
32 dyn_string_new (space)
33 int space;
35 dyn_string_t result = (dyn_string_t) xmalloc (sizeof (struct dyn_string));
37 /* We need at least one byte in which to store the terminating NUL. */
38 if (space == 0)
39 space = 1;
41 result->allocated = space;
42 result->s = (char *) xmalloc (space);
43 result->length = 0;
44 result->s[0] = '\0';
46 return result;
49 /* Free the memory used by DS. */
51 void
52 dyn_string_delete (ds)
53 dyn_string_t ds;
55 free (ds->s);
56 free (ds);
59 /* Append the NUL-terminated string S to DS, resizing DS if necessary. */
61 dyn_string_t
62 dyn_string_append (ds, s)
63 dyn_string_t ds;
64 const char *s;
66 int len = strlen (s);
68 /* The new length is the old length plus the size of our string, plus
69 one for the null at the end. */
70 dyn_string_resize (ds, ds->length + len + 1);
71 strcpy (ds->s + ds->length, s);
72 ds->length += len;
74 return ds;
77 /* Increase the capacity of DS so it can hold at least SPACE characters,
78 including the terminating NUL. This function will not (at present)
79 reduce the capacity of DS. */
81 dyn_string_t
82 dyn_string_resize (ds, space)
83 dyn_string_t ds;
84 int space;
86 int new_allocated = ds->allocated;
88 while (space > new_allocated)
89 new_allocated *= 2;
91 if (new_allocated != ds->allocated)
93 /* We actually need more space. */
94 ds->allocated = new_allocated;
95 ds->s = (char *) xrealloc (ds->s, ds->allocated);
98 return ds;