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Annotation of 43BSD/ucb/window/context.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * @(#)context.h       3.7 4/24/85
                      3:  */
                      4: 
                      5: /*
                      6:  * Copyright (c) 1983 Regents of the University of California,
                      7:  * All rights reserved.  Redistribution permitted subject to
                      8:  * the terms of the Berkeley Software License Agreement.
                      9:  */
                     10: 
                     11: #include <stdio.h>
                     12: 
                     13: struct context {
                     14:        struct context *x_link;         /* nested contexts */
                     15:        char x_type;                    /* tag for union */
                     16:        union {
                     17:                struct {        /* input is a file */
                     18:                        char *X_filename;       /* input file name */
                     19:                        FILE *X_fp;             /* input stream */
                     20:                        short X_lineno;         /* current line number */
                     21:                        char X_bol;             /* at beginning of line */
                     22:                        char X_noerr;           /* don't report errors */
                     23:                        struct ww *X_errwin;    /* error window */
                     24:                } x_f;
                     25:                struct {        /* input is a buffer */
                     26:                        char *X_buf;            /* input buffer */
                     27:                        char *X_bufp;           /* current position in buf */
                     28:                        struct value *X_arg;    /* argument for alias */
                     29:                        int X_narg;             /* number of arguments */
                     30:                } x_b;
                     31:        } x_un;
                     32:                /* holding place for current token */
                     33:        int x_token;                    /* the token */
                     34:        struct value x_val;             /* values associated with token */
                     35:                /* parser error flags */
                     36:        unsigned x_erred :1;            /* had an error */
                     37:        unsigned x_synerred :1;         /* had syntax error */
                     38:        unsigned x_abort :1;            /* fatal error */
                     39: };
                     40: #define x_buf          x_un.x_b.X_buf
                     41: #define x_bufp         x_un.x_b.X_bufp
                     42: #define x_arg          x_un.x_b.X_arg
                     43: #define x_narg         x_un.x_b.X_narg
                     44: #define x_filename     x_un.x_f.X_filename
                     45: #define x_fp           x_un.x_f.X_fp
                     46: #define x_lineno       x_un.x_f.X_lineno
                     47: #define x_bol          x_un.x_f.X_bol
                     48: #define x_errwin       x_un.x_f.X_errwin
                     49: #define x_noerr                x_un.x_f.X_noerr
                     50: 
                     51:        /* x_type values, 0 is reserved */
                     52: #define X_FILE         1               /* input is a file */
                     53: #define X_BUF          2               /* input is a buffer */
                     54: 
                     55: struct context cx;                     /* the current context */

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