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Annotation of 43BSDTahoe/ucb/window/context.h, revision 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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