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Annotation of 43BSDReno/usr.bin/window/context.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1983 Regents of the University of California.
                      3:  * 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 are permitted provided
                      9:  * that: (1) source distributions retain this entire copyright notice and
                     10:  * comment, and (2) distributions including binaries display the following
                     11:  * acknowledgement:  ``This product includes software developed by the
                     12:  * University of California, Berkeley and its contributors'' in the
                     13:  * documentation or other materials provided with the distribution and in
                     14:  * all advertising materials mentioning features or use of this software.
                     15:  * Neither the name of the University nor the names of its contributors may
                     16:  * be used to endorse or promote products derived from this software without
                     17:  * specific prior written permission.
                     18:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
                     19:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
                     20:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     21:  *
                     22:  *     @(#)context.h   3.11 (Berkeley) 6/6/90
                     23:  */
                     24: 
                     25: #include <stdio.h>
                     26: 
                     27: struct context {
                     28:        struct context *x_link;         /* nested contexts */
                     29:        char x_type;                    /* tag for union */
                     30:        union {
                     31:                struct {        /* input is a file */
                     32:                        char *X_filename;       /* input file name */
                     33:                        FILE *X_fp;             /* input stream */
                     34:                        short X_lineno;         /* current line number */
                     35:                        char X_bol;             /* at beginning of line */
                     36:                        char X_noerr;           /* don't report errors */
                     37:                        struct ww *X_errwin;    /* error window */
                     38:                } x_f;
                     39:                struct {        /* input is a buffer */
                     40:                        char *X_buf;            /* input buffer */
                     41:                        char *X_bufp;           /* current position in buf */
                     42:                        struct value *X_arg;    /* argument for alias */
                     43:                        int X_narg;             /* number of arguments */
                     44:                } x_b;
                     45:        } x_un;
                     46:                /* holding place for current token */
                     47:        int x_token;                    /* the token */
                     48:        struct value x_val;             /* values associated with token */
                     49:                /* parser error flags */
                     50:        unsigned x_erred :1;            /* had an error */
                     51:        unsigned x_synerred :1;         /* had syntax error */
                     52:        unsigned x_abort :1;            /* fatal error */
                     53: };
                     54: #define x_buf          x_un.x_b.X_buf
                     55: #define x_bufp         x_un.x_b.X_bufp
                     56: #define x_arg          x_un.x_b.X_arg
                     57: #define x_narg         x_un.x_b.X_narg
                     58: #define x_filename     x_un.x_f.X_filename
                     59: #define x_fp           x_un.x_f.X_fp
                     60: #define x_lineno       x_un.x_f.X_lineno
                     61: #define x_bol          x_un.x_f.X_bol
                     62: #define x_errwin       x_un.x_f.X_errwin
                     63: #define x_noerr                x_un.x_f.X_noerr
                     64: 
                     65:        /* x_type values, 0 is reserved */
                     66: #define X_FILE         1               /* input is a file */
                     67: #define X_BUF          2               /* input is a buffer */
                     68: 
                     69: struct context cx;                     /* the current context */

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