Annotation of src/usr.bin/window/context.c, Revision 1.2
1.2 ! deraadt 1: /* $OpenBSD: context.c,v 1.3 1995/09/28 10:34:15 tls Exp $ */
1.1 deraadt 2: /* $NetBSD: context.c,v 1.3 1995/09/28 10:34:15 tls Exp $ */
3:
4: /*
5: * Copyright (c) 1983, 1993
6: * The Regents of the University of California. All rights reserved.
7: *
8: * This code is derived from software contributed to Berkeley by
9: * Edward Wang at The University of California, Berkeley.
10: *
11: * Redistribution and use in source and binary forms, with or without
12: * modification, are permitted provided that the following conditions
13: * are met:
14: * 1. Redistributions of source code must retain the above copyright
15: * notice, this list of conditions and the following disclaimer.
16: * 2. Redistributions in binary form must reproduce the above copyright
17: * notice, this list of conditions and the following disclaimer in the
18: * documentation and/or other materials provided with the distribution.
19: * 3. All advertising materials mentioning features or use of this software
20: * must display the following acknowledgement:
21: * This product includes software developed by the University of
22: * California, Berkeley and its contributors.
23: * 4. Neither the name of the University nor the names of its contributors
24: * may be used to endorse or promote products derived from this software
25: * without specific prior written permission.
26: *
27: * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
28: * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
29: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
30: * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
31: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
32: * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
33: * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
34: * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
35: * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
36: * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
37: * SUCH DAMAGE.
38: */
39:
40: #ifndef lint
41: #if 0
42: static char sccsid[] = "@(#)context.c 8.1 (Berkeley) 6/6/93";
43: #else
1.2 ! deraadt 44: static char rcsid[] = "$OpenBSD: context.c,v 1.3 1995/09/28 10:34:15 tls Exp $";
1.1 deraadt 45: #endif
46: #endif /* not lint */
47:
48: #include "value.h"
49: #include "string.h"
50: #include "context.h"
51: #include <fcntl.h>
52:
53: /*
54: * Context push/pop for nested command files.
55: */
56:
57: char *malloc();
58:
59: cx_alloc()
60: {
61: register struct context *xp;
62:
63: if (cx.x_type != 0) {
64: xp = (struct context *)
65: malloc((unsigned) sizeof (struct context));
66: if (xp == 0)
67: return -1;
68: *xp = cx;
69: cx.x_link = xp;
70: cx.x_type = 0;
71: }
72: cx.x_erred = 0;
73: cx.x_synerred = 0;
74: cx.x_abort = 0;
75: return 0;
76: }
77:
78: cx_free()
79: {
80: struct context *xp;
81:
82: if ((xp = cx.x_link) != 0) {
83: cx = *xp;
84: free((char *)xp);
85: } else
86: cx.x_type = 0;
87: }
88:
89: cx_beginfile(filename)
90: char *filename;
91: {
92: if (cx_alloc() < 0)
93: return -1;
94: cx.x_type = X_FILE;
95: if ((cx.x_filename = str_cpy(filename)) == 0)
96: goto bad;
97: cx.x_fp = fopen(filename, "r");
98: if (cx.x_fp == 0)
99: goto bad;
100: (void) fcntl(fileno(cx.x_fp), F_SETFD, 1);
101: cx.x_bol = 1;
102: cx.x_lineno = 0;
103: cx.x_errwin = 0;
104: cx.x_noerr = 0;
105: return 0;
106: bad:
107: if (cx.x_filename != 0)
108: str_free(cx.x_filename);
109: cx_free();
110: return -1;
111: }
112:
113: cx_beginbuf(buf, arg, narg)
114: char *buf;
115: struct value *arg;
116: int narg;
117: {
118: if (cx_alloc() < 0)
119: return -1;
120: cx.x_type = X_BUF;
121: cx.x_bufp = cx.x_buf = buf;
122: cx.x_arg = arg;
123: cx.x_narg = narg;
124: return 0;
125: }
126:
127: cx_end()
128: {
129: switch (cx.x_type) {
130: case X_BUF:
131: break;
132: case X_FILE:
133: (void) fclose(cx.x_fp);
134: str_free(cx.x_filename);
135: break;
136: }
137: cx_free();
138: }