1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Edward Wang at The University of California, Berkeley. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * @(#)context.h 8.1 (Berkeley) 6/6/93 37 * $FreeBSD: src/usr.bin/window/context.h,v 1.1.1.1.14.1 2001/05/17 09:45:00 obrien Exp $ 38 * $DragonFly: src/usr.bin/window/context.h,v 1.2 2003/06/17 04:29:33 dillon Exp $ 39 */ 40 41 #include <stdio.h> 42 43 struct context { 44 struct context *x_link; /* nested contexts */ 45 char x_type; /* tag for union */ 46 union { 47 struct { /* input is a file */ 48 char *X_filename; /* input file name */ 49 FILE *X_fp; /* input stream */ 50 short X_lineno; /* current line number */ 51 char X_bol; /* at beginning of line */ 52 char X_noerr; /* don't report errors */ 53 struct ww *X_errwin; /* error window */ 54 } x_f; 55 struct { /* input is a buffer */ 56 char *X_buf; /* input buffer */ 57 char *X_bufp; /* current position in buf */ 58 struct value *X_arg; /* argument for alias */ 59 int X_narg; /* number of arguments */ 60 } x_b; 61 } x_un; 62 /* holding place for current token */ 63 int x_token; /* the token */ 64 struct value x_val; /* values associated with token */ 65 /* parser error flags */ 66 unsigned x_erred :1; /* had an error */ 67 unsigned x_synerred :1; /* had syntax error */ 68 unsigned x_abort :1; /* fatal error */ 69 }; 70 #define x_buf x_un.x_b.X_buf 71 #define x_bufp x_un.x_b.X_bufp 72 #define x_arg x_un.x_b.X_arg 73 #define x_narg x_un.x_b.X_narg 74 #define x_filename x_un.x_f.X_filename 75 #define x_fp x_un.x_f.X_fp 76 #define x_lineno x_un.x_f.X_lineno 77 #define x_bol x_un.x_f.X_bol 78 #define x_errwin x_un.x_f.X_errwin 79 #define x_noerr x_un.x_f.X_noerr 80 81 /* x_type values, 0 is reserved */ 82 #define X_FILE 1 /* input is a file */ 83 #define X_BUF 2 /* input is a buffer */ 84 85 struct context cx; /* the current context */ 86