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Annotation of 43BSDTahoe/ucb/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:  * Redistribution and use in source and binary forms are permitted
                      6:  * provided that the above copyright notice and this paragraph are
                      7:  * duplicated in all such forms and that any documentation,
                      8:  * advertising materials, and other materials related to such
                      9:  * distribution and use acknowledge that the software was developed
                     10:  * by the University of California, Berkeley.  The name of the
                     11:  * University may not be used to endorse or promote products derived
                     12:  * from this software without specific prior written permission.
                     13:  * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
                     14:  * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
                     15:  * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
                     16:  *
                     17:  *     @(#)context.h   3.9 (Berkeley) 6/29/88
                     18:  */
                     19: 
                     20: #include <stdio.h>
                     21: 
                     22: struct context {
                     23:        struct context *x_link;         /* nested contexts */
                     24:        char x_type;                    /* tag for union */
                     25:        union {
                     26:                struct {        /* input is a file */
                     27:                        char *X_filename;       /* input file name */
                     28:                        FILE *X_fp;             /* input stream */
                     29:                        short X_lineno;         /* current line number */
                     30:                        char X_bol;             /* at beginning of line */
                     31:                        char X_noerr;           /* don't report errors */
                     32:                        struct ww *X_errwin;    /* error window */
                     33:                } x_f;
                     34:                struct {        /* input is a buffer */
                     35:                        char *X_buf;            /* input buffer */
                     36:                        char *X_bufp;           /* current position in buf */
                     37:                        struct value *X_arg;    /* argument for alias */
                     38:                        int X_narg;             /* number of arguments */
                     39:                } x_b;
                     40:        } x_un;
                     41:                /* holding place for current token */
                     42:        int x_token;                    /* the token */
                     43:        struct value x_val;             /* values associated with token */
                     44:                /* parser error flags */
                     45:        unsigned x_erred :1;            /* had an error */
                     46:        unsigned x_synerred :1;         /* had syntax error */
                     47:        unsigned x_abort :1;            /* fatal error */
                     48: };
                     49: #define x_buf          x_un.x_b.X_buf
                     50: #define x_bufp         x_un.x_b.X_bufp
                     51: #define x_arg          x_un.x_b.X_arg
                     52: #define x_narg         x_un.x_b.X_narg
                     53: #define x_filename     x_un.x_f.X_filename
                     54: #define x_fp           x_un.x_f.X_fp
                     55: #define x_lineno       x_un.x_f.X_lineno
                     56: #define x_bol          x_un.x_f.X_bol
                     57: #define x_errwin       x_un.x_f.X_errwin
                     58: #define x_noerr                x_un.x_f.X_noerr
                     59: 
                     60:        /* x_type values, 0 is reserved */
                     61: #define X_FILE         1               /* input is a file */
                     62: #define X_BUF          2               /* input is a buffer */
                     63: 
                     64: struct context cx;                     /* the current context */

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