diff options
Diffstat (limited to 'usr.bin/window/context.h')
| -rw-r--r-- | usr.bin/window/context.h | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/usr.bin/window/context.h b/usr.bin/window/context.h new file mode 100644 index 0000000..4863abe --- /dev/null +++ b/usr.bin/window/context.h @@ -0,0 +1,83 @@ +/* + * 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 + */ + +#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 */ |
