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DSTRING.H
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1992-02-22
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/* dstring.h - Dynamic string handling include file. Requires strings.h.
Copyright (C) 1988, 1989, 1990 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 1, 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. */
/* MS-DOS port (c) 1990 by Thorsten Ohl, ohl@gnu.ai.mit.edu
This port is also distributed under the terms of the
GNU General Public License as published by the
Free Software Foundation.
Please note that this file is not identical to the
original GNU release, you should have received this
code as patch to the official release.
$Header: e:/gnu/cpio/RCS/dstring.h 1.1.0.2 90/09/23 23:11:17 tho Exp $
*/
#ifdef MSDOS
#ifndef FILE
#include <stdio.h>
#endif
#endif
#ifndef NULL
#define NULL 0
#endif
/* A dynamic string consists of record that records the size of an
allocated string and the pointer to that string. The actual string
is a normal zero byte terminated string that can be used with the
usual string functions. The major difference is that the
dynamic_string routines know how to get more space if it is needed
by allocating new space and copying the current string. */
typedef struct
{
int ds_length; /* Actual amount of storage allocated. */
char *ds_string; /* String. */
} dynamic_string;
/* Macros that look similar to the original string functions.
WARNING: These macros work only on pointers to dynamic string records.
If used with a real record, an "&" must be used to get the pointer. */
#define ds_strlen(s) strlen ((s)->ds_string)
#define ds_strcmp(s1, s2) strcmp ((s1)->ds_string, (s2)->ds_string)
#define ds_strncmp(s1, s2, n) strncmp ((s1)->ds_string, (s2)->ds_string, n)
#define ds_index(s, c) index ((s)->ds_string, c)
#define ds_rindex(s, c) rindex ((s)->ds_string, c)
#ifdef MSDOS
extern void ds_init (dynamic_string *string, int size);
extern void ds_resize (dynamic_string *string, int size);
extern char *ds_fgets (FILE *f, dynamic_string *s);
#else /* not MSDOS */
void ds_init ();
void ds_resize ();
char *ds_fgets ();
#endif /* not MSDOS */