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 * @(#)context.c 8.1 (Berkeley) 6/6/93 37 * $FreeBSD: src/usr.bin/window/context.c,v 1.1.1.1.14.2 2001/05/17 09:45:00 obrien Exp $ 38 * $DragonFly: src/usr.bin/window/context.c,v 1.4 2005/04/15 17:55:29 drhodus Exp $ 39 */ 40 41 #include "value.h" 42 #include "mystring.h" 43 #include "context.h" 44 #include <fcntl.h> 45 46 /* 47 * Context push/pop for nested command files. 48 */ 49 50 cx_alloc() 51 { 52 struct context *xp; 53 54 if (cx.x_type != 0) { 55 xp = (struct context *) 56 malloc((unsigned) sizeof (struct context)); 57 if (xp == 0) 58 return -1; 59 *xp = cx; 60 cx.x_link = xp; 61 cx.x_type = 0; 62 } 63 cx.x_erred = 0; 64 cx.x_synerred = 0; 65 cx.x_abort = 0; 66 return 0; 67 } 68 69 cx_free() 70 { 71 struct context *xp; 72 73 if ((xp = cx.x_link) != 0) { 74 cx = *xp; 75 free((char *)xp); 76 } else 77 cx.x_type = 0; 78 } 79 80 cx_beginfile(filename) 81 char *filename; 82 { 83 if (cx_alloc() < 0) 84 return -1; 85 cx.x_type = X_FILE; 86 if ((cx.x_filename = str_cpy(filename)) == 0) 87 goto bad; 88 cx.x_fp = fopen(filename, "r"); 89 if (cx.x_fp == 0) 90 goto bad; 91 (void) fcntl(fileno(cx.x_fp), F_SETFD, 1); 92 cx.x_bol = 1; 93 cx.x_lineno = 0; 94 cx.x_errwin = 0; 95 cx.x_noerr = 0; 96 return 0; 97 bad: 98 if (cx.x_filename != 0) 99 str_free(cx.x_filename); 100 cx_free(); 101 return -1; 102 } 103 104 cx_beginbuf(buf, arg, narg) 105 char *buf; 106 struct value *arg; 107 int narg; 108 { 109 if (cx_alloc() < 0) 110 return -1; 111 cx.x_type = X_BUF; 112 cx.x_bufp = cx.x_buf = buf; 113 cx.x_arg = arg; 114 cx.x_narg = narg; 115 return 0; 116 } 117 118 cx_end() 119 { 120 switch (cx.x_type) { 121 case X_BUF: 122 break; 123 case X_FILE: 124 (void) fclose(cx.x_fp); 125 str_free(cx.x_filename); 126 break; 127 } 128 cx_free(); 129 } 130