1*86d7f5d3SJohn Marino /* $NetBSD: context.h,v 1.5 2003/08/07 11:17:25 agc Exp $ */ 2*86d7f5d3SJohn Marino 3*86d7f5d3SJohn Marino /* 4*86d7f5d3SJohn Marino * Copyright (c) 1983, 1993 5*86d7f5d3SJohn Marino * The Regents of the University of California. All rights reserved. 6*86d7f5d3SJohn Marino * 7*86d7f5d3SJohn Marino * This code is derived from software contributed to Berkeley by 8*86d7f5d3SJohn Marino * Edward Wang at The University of California, Berkeley. 9*86d7f5d3SJohn Marino * 10*86d7f5d3SJohn Marino * Redistribution and use in source and binary forms, with or without 11*86d7f5d3SJohn Marino * modification, are permitted provided that the following conditions 12*86d7f5d3SJohn Marino * are met: 13*86d7f5d3SJohn Marino * 1. Redistributions of source code must retain the above copyright 14*86d7f5d3SJohn Marino * notice, this list of conditions and the following disclaimer. 15*86d7f5d3SJohn Marino * 2. Redistributions in binary form must reproduce the above copyright 16*86d7f5d3SJohn Marino * notice, this list of conditions and the following disclaimer in the 17*86d7f5d3SJohn Marino * documentation and/or other materials provided with the distribution. 18*86d7f5d3SJohn Marino * 3. Neither the name of the University nor the names of its contributors 19*86d7f5d3SJohn Marino * may be used to endorse or promote products derived from this software 20*86d7f5d3SJohn Marino * without specific prior written permission. 21*86d7f5d3SJohn Marino * 22*86d7f5d3SJohn Marino * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23*86d7f5d3SJohn Marino * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24*86d7f5d3SJohn Marino * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25*86d7f5d3SJohn Marino * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26*86d7f5d3SJohn Marino * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27*86d7f5d3SJohn Marino * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28*86d7f5d3SJohn Marino * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29*86d7f5d3SJohn Marino * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30*86d7f5d3SJohn Marino * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31*86d7f5d3SJohn Marino * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32*86d7f5d3SJohn Marino * SUCH DAMAGE. 33*86d7f5d3SJohn Marino * 34*86d7f5d3SJohn Marino * @(#)context.h 8.1 (Berkeley) 6/6/93 35*86d7f5d3SJohn Marino */ 36*86d7f5d3SJohn Marino 37*86d7f5d3SJohn Marino #include <stdio.h> 38*86d7f5d3SJohn Marino 39*86d7f5d3SJohn Marino #ifndef EXTERN 40*86d7f5d3SJohn Marino #define EXTERN extern 41*86d7f5d3SJohn Marino #endif 42*86d7f5d3SJohn Marino 43*86d7f5d3SJohn Marino struct context { 44*86d7f5d3SJohn Marino struct context *x_link; /* nested contexts */ 45*86d7f5d3SJohn Marino char x_type; /* tag for union */ 46*86d7f5d3SJohn Marino union { 47*86d7f5d3SJohn Marino struct { /* input is a file */ 48*86d7f5d3SJohn Marino char *X_filename; /* input file name */ 49*86d7f5d3SJohn Marino FILE *X_fp; /* input stream */ 50*86d7f5d3SJohn Marino short X_lineno; /* current line number */ 51*86d7f5d3SJohn Marino char X_bol; /* at beginning of line */ 52*86d7f5d3SJohn Marino char X_noerr; /* don't report errors */ 53*86d7f5d3SJohn Marino struct ww *X_errwin; /* error window */ 54*86d7f5d3SJohn Marino } x_f; 55*86d7f5d3SJohn Marino struct { /* input is a buffer */ 56*86d7f5d3SJohn Marino char *X_buf; /* input buffer */ 57*86d7f5d3SJohn Marino char *X_bufp; /* current position in buf */ 58*86d7f5d3SJohn Marino struct value *X_arg; /* argument for alias */ 59*86d7f5d3SJohn Marino int X_narg; /* number of arguments */ 60*86d7f5d3SJohn Marino } x_b; 61*86d7f5d3SJohn Marino } x_un; 62*86d7f5d3SJohn Marino /* holding place for current token */ 63*86d7f5d3SJohn Marino int x_token; /* the token */ 64*86d7f5d3SJohn Marino struct value x_val; /* values associated with token */ 65*86d7f5d3SJohn Marino /* parser error flags */ 66*86d7f5d3SJohn Marino unsigned x_erred :1; /* had an error */ 67*86d7f5d3SJohn Marino unsigned x_synerred :1; /* had syntax error */ 68*86d7f5d3SJohn Marino unsigned x_abort :1; /* fatal error */ 69*86d7f5d3SJohn Marino }; 70*86d7f5d3SJohn Marino #define x_buf x_un.x_b.X_buf 71*86d7f5d3SJohn Marino #define x_bufp x_un.x_b.X_bufp 72*86d7f5d3SJohn Marino #define x_arg x_un.x_b.X_arg 73*86d7f5d3SJohn Marino #define x_narg x_un.x_b.X_narg 74*86d7f5d3SJohn Marino #define x_filename x_un.x_f.X_filename 75*86d7f5d3SJohn Marino #define x_fp x_un.x_f.X_fp 76*86d7f5d3SJohn Marino #define x_lineno x_un.x_f.X_lineno 77*86d7f5d3SJohn Marino #define x_bol x_un.x_f.X_bol 78*86d7f5d3SJohn Marino #define x_errwin x_un.x_f.X_errwin 79*86d7f5d3SJohn Marino #define x_noerr x_un.x_f.X_noerr 80*86d7f5d3SJohn Marino 81*86d7f5d3SJohn Marino /* x_type values, 0 is reserved */ 82*86d7f5d3SJohn Marino #define X_FILE 1 /* input is a file */ 83*86d7f5d3SJohn Marino #define X_BUF 2 /* input is a buffer */ 84*86d7f5d3SJohn Marino 85*86d7f5d3SJohn Marino EXTERN struct context cx; /* the current context */ 86