/* $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(); }