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Annotation of src/usr.bin/window/context.h, Revision 1.1.1.1

1.1       deraadt     1: /*     $NetBSD: context.h,v 1.3 1995/09/28 10:34:17 tls Exp $  */
                      2:
                      3: /*
                      4:  * Copyright (c) 1983, 1993
                      5:  *     The Regents of the University of California.  All rights reserved.
                      6:  *
                      7:  * This code is derived from software contributed to Berkeley by
                      8:  * Edward Wang at The University of California, Berkeley.
                      9:  *
                     10:  * Redistribution and use in source and binary forms, with or without
                     11:  * modification, are permitted provided that the following conditions
                     12:  * are met:
                     13:  * 1. Redistributions of source code must retain the above copyright
                     14:  *    notice, this list of conditions and the following disclaimer.
                     15:  * 2. Redistributions in binary form must reproduce the above copyright
                     16:  *    notice, this list of conditions and the following disclaimer in the
                     17:  *    documentation and/or other materials provided with the distribution.
                     18:  * 3. All advertising materials mentioning features or use of this software
                     19:  *    must display the following acknowledgement:
                     20:  *     This product includes software developed by the University of
                     21:  *     California, Berkeley and its contributors.
                     22:  * 4. Neither the name of the University nor the names of its contributors
                     23:  *    may be used to endorse or promote products derived from this software
                     24:  *    without specific prior written permission.
                     25:  *
                     26:  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
                     27:  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
                     28:  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
                     29:  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
                     30:  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
                     31:  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
                     32:  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
                     33:  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
                     34:  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
                     35:  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
                     36:  * SUCH DAMAGE.
                     37:  *
                     38:  *     @(#)context.h   8.1 (Berkeley) 6/6/93
                     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 */