projects / unix-history / blame
| Commit | Line | Data |
|---|---|---|
| 1fb887dd | 1 | /* |
| 60de5df9 EW |
2 | * @(#)context.h 3.7 %G% |
| 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. | |
| 1fb887dd EW |
9 | */ |
| 10 | ||
| b1189050 EW |
11 | #include <stdio.h> |
| 12 | ||
| 1fb887dd EW |
13 | struct context { |
| 14 | struct context *x_link; /* nested contexts */ | |
| a40a2f9a EW |
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 */ | |
| 1fb887dd | 24 | } x_f; |
| a40a2f9a EW |
25 | struct { /* input is a buffer */ |
| 26 | char *X_buf; /* input buffer */ | |
| 27 | char *X_bufp; /* current position in buf */ | |
| bb4a0c0b EW |
28 | struct value *X_arg; /* argument for alias */ |
| 29 | int X_narg; /* number of arguments */ | |
| 1fb887dd EW |
30 | } x_b; |
| 31 | } x_un; | |
| a40a2f9a EW |
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 */ | |
| 1fb887dd EW |
39 | }; |
| 40 | #define x_buf x_un.x_b.X_buf | |
| 41 | #define x_bufp x_un.x_b.X_bufp | |
| bb4a0c0b EW |
42 | #define x_arg x_un.x_b.X_arg |
| 43 | #define x_narg x_un.x_b.X_narg | |
| 1fb887dd EW |
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 | |
| 1fb887dd EW |
47 | #define x_bol x_un.x_f.X_bol |
| 48 | #define x_errwin x_un.x_f.X_errwin | |
| a40a2f9a | 49 | #define x_noerr x_un.x_f.X_noerr |
| 1fb887dd | 50 | |
| a40a2f9a EW |
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 */ | |
| 1fb887dd | 54 | |
| a40a2f9a | 55 | struct context cx; /* the current context */ |