Annotation of src/usr.bin/window/context.h, Revision 1.3
1.3 ! downsj 1: /* $OpenBSD$ */
1.1 deraadt 2: /* $NetBSD: context.h,v 1.3 1995/09/28 10:34:17 tls Exp $ */
3:
4: /*
5: * Copyright (c) 1983, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * This code is derived from software contributed to Berkeley by
9: * Edward Wang at The University of California, Berkeley.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
19: * 3. All advertising materials mentioning features or use of this software
20: * must display the following acknowledgement:
21: * This product includes software developed by the University of
22: * California, Berkeley and its contributors.
23: * 4. Neither the name of the University nor the names of its contributors
24: * may be used to endorse or promote products derived from this software
25: * without specific prior written permission.
26: *
27: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37: * SUCH DAMAGE.
38: *
39: * @(#)context.h 8.1 (Berkeley) 6/6/93
40: */
41:
42: #include <stdio.h>
43:
44: struct context {
45: struct context *x_link; /* nested contexts */
46: char x_type; /* tag for union */
47: union {
48: struct { /* input is a file */
49: char *X_filename; /* input file name */
50: FILE *X_fp; /* input stream */
51: short X_lineno; /* current line number */
52: char X_bol; /* at beginning of line */
53: char X_noerr; /* don't report errors */
54: struct ww *X_errwin; /* error window */
55: } x_f;
56: struct { /* input is a buffer */
57: char *X_buf; /* input buffer */
58: char *X_bufp; /* current position in buf */
59: struct value *X_arg; /* argument for alias */
60: int X_narg; /* number of arguments */
61: } x_b;
62: } x_un;
63: /* holding place for current token */
64: int x_token; /* the token */
65: struct value x_val; /* values associated with token */
66: /* parser error flags */
67: unsigned x_erred :1; /* had an error */
68: unsigned x_synerred :1; /* had syntax error */
69: unsigned x_abort :1; /* fatal error */
70: };
71: #define x_buf x_un.x_b.X_buf
72: #define x_bufp x_un.x_b.X_bufp
73: #define x_arg x_un.x_b.X_arg
74: #define x_narg x_un.x_b.X_narg
75: #define x_filename x_un.x_f.X_filename
76: #define x_fp x_un.x_f.X_fp
77: #define x_lineno x_un.x_f.X_lineno
78: #define x_bol x_un.x_f.X_bol
79: #define x_errwin x_un.x_f.X_errwin
80: #define x_noerr x_un.x_f.X_noerr
81:
82: /* x_type values, 0 is reserved */
83: #define X_FILE 1 /* input is a file */
84: #define X_BUF 2 /* input is a buffer */
85:
86: struct context cx; /* the current context */