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 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* 30 * unctrl.c 31 * 32 * XCurses Library 33 * 34 * Copyright 1990, 1995 by Mortice Kern Systems Inc. All rights reserved. 35 * 36 */ 37 38 #if M_RCSID 39 #ifndef lint 40 static char rcsID[] = "$Header: /rd/src/libc/xcurses/rcs/unctrl.c 1.2 1995/10/02 19:34:15 ant Exp $"; 41 #endif 42 #endif 43 44 #include <private.h> 45 #include <limits.h> 46 #include <ctype.h> 47 48 static const char *carat[] = { 49 "^?", 50 "^@", 51 "^A", 52 "^B", 53 "^C", 54 "^D", 55 "^E", 56 "^F", 57 "^G", 58 "^H", 59 "^I", 60 "^J", 61 "^K", 62 "^L", 63 "^M", 64 "^N", 65 "^O", 66 "^P", 67 "^Q", 68 "^R", 69 "^S", 70 "^T", 71 "^U", 72 "^V", 73 "^W", 74 "^X", 75 "^Y", 76 "^Z", 77 "^[", 78 "^\\", 79 "^]", 80 "^^", 81 "^_" 82 }; 83 84 const char * 85 unctrl(chtype ch) 86 { 87 char *str; 88 int c, msb; 89 static char chr[5]; 90 91 #ifdef M_CURSES_TRACE 92 __m_trace("unctrl(%ld)", ch); 93 #endif 94 95 /* Map wide character to a wide string. */ 96 c = ch & A_CHARTEXT; 97 msb = 1 << (CHAR_BIT-1); 98 99 if (iscntrl(c)) { 100 /* ASCII DEL */ 101 if (c == 127) 102 return __m_return_pointer("unctrl", carat[0]); 103 104 /* ASCII control codes. */ 105 if (0 <= c && c < 32) 106 return __m_return_pointer("unctrl", carat[c+1]); 107 108 /* Something we don't know what to do with. */ 109 return __m_return_pointer("unctrl", (char *) 0); 110 } else if (c & msb) { 111 /* Meta key notation if high bit is set on character. */ 112 c &= ~msb; 113 114 chr[0] = 'M'; 115 chr[1] = '-'; 116 117 if (iscntrl(c)) { 118 str = (char *) unctrl(c); 119 chr[2] = *str++; 120 chr[3] = *str; 121 chr[4] = '\0'; 122 } else { 123 chr[2] = c; 124 chr[3] = '\0'; 125 } 126 } else { 127 /* Return byte as is. */ 128 chr[0] = c; 129 chr[1] = '\0'; 130 } 131 132 return __m_return_pointer("unctrl", chr); 133 } 134