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 1.2 2003/06/17 04:29:33 dillon 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 char *malloc(); 51 52 cx_alloc() 53 { 54 register struct context *xp; 55 56 if (cx.x_type != 0) { 57 xp = (struct context *) 58 malloc((unsigned) sizeof (struct context)); 59 if (xp == 0) 60 return -1; 61 *xp = cx; 62 cx.x_link = xp; 63 cx.x_type = 0; 64 } 65 cx.x_erred = 0; 66 cx.x_synerred = 0; 67 cx.x_abort = 0; 68 return 0; 69 } 70 71 cx_free() 72 { 73 struct context *xp; 74 75 if ((xp = cx.x_link) != 0) { 76 cx = *xp; 77 free((char *)xp); 78 } else 79 cx.x_type = 0; 80 } 81 82 cx_beginfile(filename) 83 char *filename; 84 { 85 if (cx_alloc() < 0) 86 return -1; 87 cx.x_type = X_FILE; 88 if ((cx.x_filename = str_cpy(filename)) == 0) 89 goto bad; 90 cx.x_fp = fopen(filename, "r"); 91 if (cx.x_fp == 0) 92 goto bad; 93 (void) fcntl(fileno(cx.x_fp), F_SETFD, 1); 94 cx.x_bol = 1; 95 cx.x_lineno = 0; 96 cx.x_errwin = 0; 97 cx.x_noerr = 0; 98 return 0; 99 bad: 100 if (cx.x_filename != 0) 101 str_free(cx.x_filename); 102 cx_free(); 103 return -1; 104 } 105 106 cx_beginbuf(buf, arg, narg) 107 char *buf; 108 struct value *arg; 109 int narg; 110 { 111 if (cx_alloc() < 0) 112 return -1; 113 cx.x_type = X_BUF; 114 cx.x_bufp = cx.x_buf = buf; 115 cx.x_arg = arg; 116 cx.x_narg = narg; 117 return 0; 118 } 119 120 cx_end() 121 { 122 switch (cx.x_type) { 123 case X_BUF: 124 break; 125 case X_FILE: 126 (void) fclose(cx.x_fp); 127 str_free(cx.x_filename); 128 break; 129 } 130 cx_free(); 131 } 132