85 lines
3.4 KiB
C
85 lines
3.4 KiB
C
/*
|
|
* Copyright (c) 1983, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* This code is derived from software contributed to Berkeley by
|
|
* Edward Wang at The University of California, Berkeley.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by the University of
|
|
* California, Berkeley and its contributors.
|
|
* 4. Neither the name of the University nor the names of its contributors
|
|
* may be used to endorse or promote products derived from this software
|
|
* without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*
|
|
* @(#)context.h 8.1 (Berkeley) 6/6/93
|
|
* $FreeBSD$
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
|
|
struct context {
|
|
struct context *x_link; /* nested contexts */
|
|
char x_type; /* tag for union */
|
|
union {
|
|
struct { /* input is a file */
|
|
char *X_filename; /* input file name */
|
|
FILE *X_fp; /* input stream */
|
|
short X_lineno; /* current line number */
|
|
char X_bol; /* at beginning of line */
|
|
char X_noerr; /* don't report errors */
|
|
struct ww *X_errwin; /* error window */
|
|
} x_f;
|
|
struct { /* input is a buffer */
|
|
char *X_buf; /* input buffer */
|
|
char *X_bufp; /* current position in buf */
|
|
struct value *X_arg; /* argument for alias */
|
|
int X_narg; /* number of arguments */
|
|
} x_b;
|
|
} x_un;
|
|
/* holding place for current token */
|
|
int x_token; /* the token */
|
|
struct value x_val; /* values associated with token */
|
|
/* parser error flags */
|
|
unsigned x_erred :1; /* had an error */
|
|
unsigned x_synerred :1; /* had syntax error */
|
|
unsigned x_abort :1; /* fatal error */
|
|
};
|
|
#define x_buf x_un.x_b.X_buf
|
|
#define x_bufp x_un.x_b.X_bufp
|
|
#define x_arg x_un.x_b.X_arg
|
|
#define x_narg x_un.x_b.X_narg
|
|
#define x_filename x_un.x_f.X_filename
|
|
#define x_fp x_un.x_f.X_fp
|
|
#define x_lineno x_un.x_f.X_lineno
|
|
#define x_bol x_un.x_f.X_bol
|
|
#define x_errwin x_un.x_f.X_errwin
|
|
#define x_noerr x_un.x_f.X_noerr
|
|
|
|
/* x_type values, 0 is reserved */
|
|
#define X_FILE 1 /* input is a file */
|
|
#define X_BUF 2 /* input is a buffer */
|
|
|
|
struct context cx; /* the current context */
|