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/* $OpenBSD: context.c,v 1.6 2003/07/18 23:11:43 david Exp $ */
/* $NetBSD: context.c,v 1.3 1995/09/28 10:34:15 tls Exp $ */
/*
* Copyright (c) 1983, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Edward Wang at The University of California, Berkeley.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#ifndef lint
#if 0
static char sccsid[] = "@(#)context.c 8.1 (Berkeley) 6/6/93";
#else
static char rcsid[] = "$OpenBSD: context.c,v 1.6 2003/07/18 23:11:43 david Exp $";
#endif
#endif /* not lint */
#include "value.h"
#include "string.h"
#include "context.h"
#include <fcntl.h>
#include <stdlib.h>
/*
* Context push/pop for nested command files.
*/
char *malloc();
cx_alloc()
{
struct context *xp;
if (cx.x_type != 0) {
xp = (struct context *)
malloc((unsigned) sizeof (struct context));
if (xp == 0)
return -1;
*xp = cx;
cx.x_link = xp;
cx.x_type = 0;
}
cx.x_erred = 0;
cx.x_synerred = 0;
cx.x_abort = 0;
return 0;
}
cx_free()
{
struct context *xp;
if ((xp = cx.x_link) != 0) {
cx = *xp;
free((char *)xp);
} else
cx.x_type = 0;
}
cx_beginfile(filename)
char *filename;
{
if (cx_alloc() < 0)
return -1;
cx.x_type = X_FILE;
if ((cx.x_filename = str_cpy(filename)) == 0)
goto bad;
cx.x_fp = fopen(filename, "r");
if (cx.x_fp == 0)
goto bad;
(void) fcntl(fileno(cx.x_fp), F_SETFD, 1);
cx.x_bol = 1;
cx.x_lineno = 0;
cx.x_errwin = 0;
cx.x_noerr = 0;
return 0;
bad:
if (cx.x_filename != 0)
str_free(cx.x_filename);
cx_free();
return -1;
}
cx_beginbuf(buf, arg, narg)
char *buf;
struct value *arg;
int narg;
{
if (cx_alloc() < 0)
return -1;
cx.x_type = X_BUF;
cx.x_bufp = cx.x_buf = buf;
cx.x_arg = arg;
cx.x_narg = narg;
return 0;
}
cx_end()
{
switch (cx.x_type) {
case X_BUF:
break;
case X_FILE:
(void) fclose(cx.x_fp);
str_free(cx.x_filename);
break;
}
cx_free();
}
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