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)
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. */
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
32 dyn_string_new (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. */
41 result->allocated = space;
42 result->s = (char *) xmalloc (space);
49 /* Free the memory used by DS. */
52 dyn_string_delete (ds)
59 /* Append the NUL-terminated string S to DS, resizing DS if necessary. */
62 dyn_string_append (ds, 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);
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. */
82 dyn_string_resize (ds, space)
86 int new_allocated = ds->allocated;
88 while (space > new_allocated)
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);