/* $NetBSD: context.h,v 1.3 1995/09/28 10:34:17 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. All advertising materials mentioning features or use of this software * must display the following acknowledgement: * This product includes software developed by the University of * California, Berkeley and its contributors. * 4. 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. * * @(#)context.h 8.1 (Berkeley) 6/6/93 */ #include <stdio.h> #ifndef EXTERN #define EXTERN extern #endif struct context { struct context *x_link; /* nested contexts */ char x_type; /* tag for union */ union { struct { /* input is a file */ char *X_filename; /* input file name */ FILE *X_fp; /* input stream */ short X_lineno; /* current line number */ char X_bol; /* at beginning of line */ char X_noerr; /* don't report errors */ struct ww *X_errwin; /* error window */ } x_f; struct { /* input is a buffer */ char *X_buf; /* input buffer */ char *X_bufp; /* current position in buf */ struct value *X_arg; /* argument for alias */ int X_narg; /* number of arguments */ } x_b; } x_un; /* holding place for current token */ int x_token; /* the token */ struct value x_val; /* values associated with token */ /* parser error flags */ unsigned x_erred :1; /* had an error */ unsigned x_synerred :1; /* had syntax error */ unsigned x_abort :1; /* fatal error */ }; #define x_buf x_un.x_b.X_buf #define x_bufp x_un.x_b.X_bufp #define x_arg x_un.x_b.X_arg #define x_narg x_un.x_b.X_narg #define x_filename x_un.x_f.X_filename #define x_fp x_un.x_f.X_fp #define x_lineno x_un.x_f.X_lineno #define x_bol x_un.x_f.X_bol #define x_errwin x_un.x_f.X_errwin #define x_noerr x_un.x_f.X_noerr /* x_type values, 0 is reserved */ #define X_FILE 1 /* input is a file */ #define X_BUF 2 /* input is a buffer */ EXTERN struct context cx; /* the current context */