1 /* 2 * CDDL HEADER START 3 * 4 * The contents of this file are subject to the terms of the 5 * Common Development and Distribution License, Version 1.0 only 6 * (the "License"). You may not use this file except in compliance 7 * with the License. 8 * 9 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10 * or http://www.opensolaris.org/os/licensing. 11 * See the License for the specific language governing permissions 12 * and limitations under the License. 13 * 14 * When distributing Covered Code, include this CDDL HEADER in each 15 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16 * If applicable, add the following below this CDDL HEADER, with the 17 * fields enclosed by brackets "[]" replaced with your own identifying 18 * information: Portions Copyright [yyyy] [name of copyright owner] 19 * 20 * CDDL HEADER END 21 */ 22 /* 23 * Copyright (c) 1995, by Sun Microsystems, Inc. 24 * All rights reserved. 25 */ 26 27 /* 28 * unctrl.c 29 * 30 * XCurses Library 31 * 32 * Copyright 1990, 1995 by Mortice Kern Systems Inc. All rights reserved. 33 * 34 */ 35 36 #if M_RCSID 37 #ifndef lint 38 static char rcsID[] = "$Header: /rd/src/libc/xcurses/rcs/unctrl.c 1.2 1995/10/02 19:34:15 ant Exp $"; 39 #endif 40 #endif 41 42 #include <private.h> 43 #include <limits.h> 44 #include <ctype.h> 45 46 static const char *carat[] = { 47 "^?", 48 "^@", 49 "^A", 50 "^B", 51 "^C", 52 "^D", 53 "^E", 54 "^F", 55 "^G", 56 "^H", 57 "^I", 58 "^J", 59 "^K", 60 "^L", 61 "^M", 62 "^N", 63 "^O", 64 "^P", 65 "^Q", 66 "^R", 67 "^S", 68 "^T", 69 "^U", 70 "^V", 71 "^W", 72 "^X", 73 "^Y", 74 "^Z", 75 "^[", 76 "^\\", 77 "^]", 78 "^^", 79 "^_" 80 }; 81 82 const char * 83 unctrl(chtype ch) 84 { 85 char *str; 86 int c, msb; 87 static char chr[5]; 88 89 #ifdef M_CURSES_TRACE 90 __m_trace("unctrl(%ld)", ch); 91 #endif 92 93 /* Map wide character to a wide string. */ 94 c = ch & A_CHARTEXT; 95 msb = 1 << (CHAR_BIT-1); 96 97 if (iscntrl(c)) { 98 /* ASCII DEL */ 99 if (c == 127) 100 return __m_return_pointer("unctrl", carat[0]); 101 102 /* ASCII control codes. */ 103 if (0 <= c && c < 32) 104 return __m_return_pointer("unctrl", carat[c+1]); 105 106 /* Something we don't know what to do with. */ 107 return __m_return_pointer("unctrl", (char *) 0); 108 } else if (c & msb) { 109 /* Meta key notation if high bit is set on character. */ 110 c &= ~msb; 111 112 chr[0] = 'M'; 113 chr[1] = '-'; 114 115 if (iscntrl(c)) { 116 str = (char *) unctrl(c); 117 chr[2] = *str++; 118 chr[3] = *str; 119 chr[4] = '\0'; 120 } else { 121 chr[2] = c; 122 chr[3] = '\0'; 123 } 124 } else { 125 /* Return byte as is. */ 126 chr[0] = c; 127 chr[1] = '\0'; 128 } 129 130 return __m_return_pointer("unctrl", chr); 131 } 132