1 /* $NetBSD: context.c,v 1.7 2003/08/07 11:17:24 agc Exp $ */ 2 3 /* 4 * Copyright (c) 1983, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * Edward Wang at The University of California, Berkeley. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 3. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 */ 34 35 #include <sys/cdefs.h> 36 #ifndef lint 37 #if 0 38 static char sccsid[] = "@(#)context.c 8.1 (Berkeley) 6/6/93"; 39 #else 40 __RCSID("$NetBSD: context.c,v 1.7 2003/08/07 11:17:24 agc Exp $"); 41 #endif 42 #endif /* not lint */ 43 44 #include <fcntl.h> 45 #include <stdlib.h> 46 #include "defs.h" 47 #include "window_string.h" 48 #undef EXTERN 49 #define EXTERN 50 #include "context.h" 51 #undef EXTERN 52 53 /* 54 * Context push/pop for nested command files. 55 */ 56 int cx_alloc(void); 57 void cx_free(void); 58 59 int 60 cx_alloc(void) 61 { 62 struct context *xp; 63 64 if (cx.x_type != 0) { 65 xp = (struct context *) 66 malloc((unsigned) sizeof (struct context)); 67 if (xp == 0) 68 return -1; 69 *xp = cx; 70 cx.x_link = xp; 71 cx.x_type = 0; 72 } 73 cx.x_erred = 0; 74 cx.x_synerred = 0; 75 cx.x_abort = 0; 76 return 0; 77 } 78 79 void 80 cx_free(void) 81 { 82 struct context *xp; 83 84 if ((xp = cx.x_link) != 0) { 85 cx = *xp; 86 free((char *)xp); 87 } else 88 cx.x_type = 0; 89 } 90 91 int 92 cx_beginfile(char *filename) 93 { 94 if (cx_alloc() < 0) 95 return -1; 96 cx.x_type = X_FILE; 97 if ((cx.x_filename = str_cpy(filename)) == 0) 98 goto bad; 99 cx.x_fp = fopen(filename, "r"); 100 if (cx.x_fp == 0) 101 goto bad; 102 (void) fcntl(fileno(cx.x_fp), F_SETFD, 1); 103 cx.x_bol = 1; 104 cx.x_lineno = 0; 105 cx.x_errwin = 0; 106 cx.x_noerr = 0; 107 return 0; 108 bad: 109 if (cx.x_filename != 0) 110 str_free(cx.x_filename); 111 cx_free(); 112 return -1; 113 } 114 115 int 116 cx_beginbuf(char *buf, struct value *arg, 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 void 128 cx_end(void) 129 { 130 switch (cx.x_type) { 131 case X_BUF: 132 break; 133 case X_FILE: 134 (void) fclose(cx.x_fp); 135 str_free(cx.x_filename); 136 break; 137 } 138 cx_free(); 139 } 140