1 /* An abstract string datatype.
2 Copyright (C) 1998 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 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 GNU CC is distributed in the hope that it will be useful, but
13 WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 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 the Free
19 Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
21 /* This file lives in at least two places: binutils and gcc.
22 Don't change one without the other. */
27 #include "gansidecl.h"
31 #include "dyn-string.h"
33 extern char *xmalloc ();
34 extern char *xrealloc ();
36 /* Create a new dynamic string capable of holding at least SPACE
37 characters, including the terminating NUL. If SPACE is 0, it
38 will be silently increased to 1. */
41 dyn_string_new (space
)
44 dyn_string_t result
= (dyn_string_t
) xmalloc (sizeof (struct dyn_string
));
47 /* We need at least one byte in which to store the terminating
51 result
->allocated
= space
;
52 result
->s
= (char*) xmalloc (space
);
59 /* Free the memory used by DS. */
62 dyn_string_delete (ds
)
69 /* Append the NUL-terminated string S to DS, resizing DS if
73 dyn_string_append (ds
, s
)
78 dyn_string_resize (ds
, ds
->length
+ len
+ 1 /* '\0' */);
79 strcpy (ds
->s
+ ds
->length
, s
);
85 /* Increase the capacity of DS so that it can hold at least SPACE
86 characters, including the terminating NUL. This function will not
87 (at present) reduce the capacity of DS. */
90 dyn_string_resize (ds
, space
)
94 int new_allocated
= ds
->allocated
;
96 while (space
> new_allocated
)
99 if (new_allocated
!= ds
->allocated
)
101 /* We actually need more space. */
102 ds
->allocated
= new_allocated
;
103 ds
->s
= (char*) xrealloc (ds
->s
, ds
->allocated
);
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