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 /* Copyright (c) 1988 AT&T */ 23 /* All Rights Reserved */ 24 25 26 /* 27 * Copyright (c) 1997, by Sun Microsystems, Inc. 28 * All rights reserved. 29 */ 30 31 #pragma ident "%Z%%M% %I% %E% SMI" 32 33 /*LINTLIBRARY*/ 34 35 #include <widec.h> 36 #include "synonyms.h" 37 #include <ctype.h> 38 #include <sys/types.h> 39 #include "curses_wchar.h" 40 41 int 42 _curs_mbtowc(wchar_t *wchar, const char *s, size_t n) 43 { 44 int length, c; 45 wchar_t intcode; 46 char *olds = (char *)s; 47 wchar_t mask; 48 49 if (s == (char *)0) 50 return (0); 51 if (n == 0) 52 return (-1); 53 c = (unsigned char)*s++; 54 if (c < 0200) { 55 if (wchar) 56 *wchar = c; 57 return (c ? 1 : 0); 58 } 59 intcode = 0; 60 if (c == SS2) { 61 if ((length = eucw2) == 0) 62 goto lab1; 63 mask = P01; 64 goto lab2; 65 } else if (c == SS3) { 66 if ((length = eucw3) == 0) 67 goto lab1; 68 mask = P10; 69 goto lab2; 70 } 71 lab1: 72 if (iscntrl(c)) { 73 if (wchar) 74 *wchar = c; 75 return (1); 76 } 77 length = eucw1 - 1; 78 mask = P11; 79 intcode = c & 0177; 80 lab2: 81 if (length + 1 > n || length < 0) 82 return (-1); 83 while (length--) { 84 if ((c = (unsigned char)*s++) < 0200 || iscntrl(c)) 85 return (-1); 86 intcode = (intcode << 7) | (c & 0x7F); 87 } 88 if (wchar) 89 *wchar = intcode | mask; 90 /*LINTED*/ 91 return ((int) (s - olds)); 92 } 93