1 /* 2 * Copyright (c) 1983, 1993 3 * The Regents of the University of California. All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * Edward Wang at The University of California, Berkeley. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #ifndef lint 38 static char sccsid[] = "@(#)context.c 8.1 (Berkeley) 6/6/93"; 39 static char rcsid[] = 40 "$FreeBSD: src/usr.bin/window/context.c,v 1.1.1.1.14.2 2001/05/17 09:45:00 obrien Exp $"; 41 #endif /* not lint */ 42 43 #include "value.h" 44 #include "mystring.h" 45 #include "context.h" 46 #include <fcntl.h> 47 48 /* 49 * Context push/pop for nested command files. 50 */ 51 52 char *malloc(); 53 54 cx_alloc() 55 { 56 register struct context *xp; 57 58 if (cx.x_type != 0) { 59 xp = (struct context *) 60 malloc((unsigned) sizeof (struct context)); 61 if (xp == 0) 62 return -1; 63 *xp = cx; 64 cx.x_link = xp; 65 cx.x_type = 0; 66 } 67 cx.x_erred = 0; 68 cx.x_synerred = 0; 69 cx.x_abort = 0; 70 return 0; 71 } 72 73 cx_free() 74 { 75 struct context *xp; 76 77 if ((xp = cx.x_link) != 0) { 78 cx = *xp; 79 free((char *)xp); 80 } else 81 cx.x_type = 0; 82 } 83 84 cx_beginfile(filename) 85 char *filename; 86 { 87 if (cx_alloc() < 0) 88 return -1; 89 cx.x_type = X_FILE; 90 if ((cx.x_filename = str_cpy(filename)) == 0) 91 goto bad; 92 cx.x_fp = fopen(filename, "r"); 93 if (cx.x_fp == 0) 94 goto bad; 95 (void) fcntl(fileno(cx.x_fp), F_SETFD, 1); 96 cx.x_bol = 1; 97 cx.x_lineno = 0; 98 cx.x_errwin = 0; 99 cx.x_noerr = 0; 100 return 0; 101 bad: 102 if (cx.x_filename != 0) 103 str_free(cx.x_filename); 104 cx_free(); 105 return -1; 106 } 107 108 cx_beginbuf(buf, arg, narg) 109 char *buf; 110 struct value *arg; 111 int narg; 112 { 113 if (cx_alloc() < 0) 114 return -1; 115 cx.x_type = X_BUF; 116 cx.x_bufp = cx.x_buf = buf; 117 cx.x_arg = arg; 118 cx.x_narg = narg; 119 return 0; 120 } 121 122 cx_end() 123 { 124 switch (cx.x_type) { 125 case X_BUF: 126 break; 127 case X_FILE: 128 (void) fclose(cx.x_fp); 129 str_free(cx.x_filename); 130 break; 131 } 132 cx_free(); 133 } 134