home *** CD-ROM | disk | FTP | other *** search
- /* varstring.h: variable-length strings.
-
- Copyright (C) 1992 Free Software Foundation, Inc.
-
- This program is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with this program; if not, write to the Free Software
- Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- #ifndef VARSTRING_H
- #define VARSTRING_H
-
- #include "types.h"
-
-
- /* Initialize a variable-length string. */
- typedef struct
- {
- unsigned allocated;
- unsigned used;
- string data;
- } variable_string;
-
- /* The data characters. */
- #define VS_CHARS(vs) ((vs).data)
-
- /* This is the number of bytes allocated for the string. */
- #define VS_ALLOCATED(vs) ((vs).allocated)
-
- /* This is the number of bytes used. */
- #define VS_USED(vs) ((vs).used)
-
-
- /* Create a new structure, initializing the data to a null byte. */
- extern variable_string vs_init (void);
-
- /* Free the string. */
- extern void vs_free (variable_string *);
-
-
- /* Put NEW_CHAR at position POS in S. POS may be beyond the current
- length of S. You are responsible for putting a null at the end of
- the string when you are done constructing it, if you want one. */
- extern void vs_set_char (variable_string *s, unsigned pos, char new_char);
-
- /* Put NEW_CHAR at the end of V. As with `vs_set_char', no null is
- appended. */
- extern void vs_append_char (variable_string *v, char new_char);
-
- /* Return concatenation of VS1 and VS2 in a new variable string. */
- extern variable_string vs_concat (variable_string vs1, variable_string vs2);
-
- #endif /* not VARSTRING_H */
-
-