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 (the "License"). 6 * You may not use this file except in compliance with the License. 7 * 8 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 9 * or http://www.opensolaris.org/os/licensing. 10 * See the License for the specific language governing permissions 11 * and limitations under the License. 12 * 13 * When distributing Covered Code, include this CDDL HEADER in each 14 * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 15 * If applicable, add the following below this CDDL HEADER, with the 16 * fields enclosed by brackets "[]" replaced with your own identifying 17 * information: Portions Copyright [yyyy] [name of copyright owner] 18 * 19 * CDDL HEADER END 20 */ 21 22 /* 23 * Copyright 2008 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 /* Copyright (c) 1988 AT&T */ 28 /* All Rights Reserved */ 29 30 #include <widec.h> 31 #include <ctype.h> 32 #include <sys/types.h> 33 #include "curses_wchar.h" 34 35 int _curs_mbtowc(wchar_t * wchar,const char * s,size_t n)36_curs_mbtowc(wchar_t *wchar, const char *s, size_t n) 37 { 38 int length, c; 39 wchar_t intcode; 40 char *olds = (char *)s; 41 wchar_t mask; 42 43 if (s == (char *)0) 44 return (0); 45 if (n == 0) 46 return (-1); 47 c = (unsigned char)*s++; 48 if (c < 0200) { 49 if (wchar) 50 *wchar = c; 51 return (c ? 1 : 0); 52 } 53 intcode = 0; 54 if (c == SS2) { 55 if ((length = eucw2) == 0) 56 goto lab1; 57 mask = P01; 58 goto lab2; 59 } else if (c == SS3) { 60 if ((length = eucw3) == 0) 61 goto lab1; 62 mask = P10; 63 goto lab2; 64 } 65 lab1: 66 if (iscntrl(c)) { 67 if (wchar) 68 *wchar = c; 69 return (1); 70 } 71 length = eucw1 - 1; 72 mask = P11; 73 intcode = c & 0177; 74 lab2: 75 if (length + 1 > n || length < 0) 76 return (-1); 77 while (length--) { 78 if ((c = (unsigned char)*s++) < 0200 || iscntrl(c)) 79 return (-1); 80 intcode = (intcode << 7) | (c & 0x7F); 81 } 82 if (wchar) 83 *wchar = intcode | mask; 84 /*LINTED*/ 85 return ((int)(s - olds)); 86 } 87