1*7c478bd9Sstevel@tonic-gate /* 2*7c478bd9Sstevel@tonic-gate * CDDL HEADER START 3*7c478bd9Sstevel@tonic-gate * 4*7c478bd9Sstevel@tonic-gate * The contents of this file are subject to the terms of the 5*7c478bd9Sstevel@tonic-gate * Common Development and Distribution License, Version 1.0 only 6*7c478bd9Sstevel@tonic-gate * (the "License"). You may not use this file except in compliance 7*7c478bd9Sstevel@tonic-gate * with the License. 8*7c478bd9Sstevel@tonic-gate * 9*7c478bd9Sstevel@tonic-gate * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE 10*7c478bd9Sstevel@tonic-gate * or http://www.opensolaris.org/os/licensing. 11*7c478bd9Sstevel@tonic-gate * See the License for the specific language governing permissions 12*7c478bd9Sstevel@tonic-gate * and limitations under the License. 13*7c478bd9Sstevel@tonic-gate * 14*7c478bd9Sstevel@tonic-gate * When distributing Covered Code, include this CDDL HEADER in each 15*7c478bd9Sstevel@tonic-gate * file and include the License file at usr/src/OPENSOLARIS.LICENSE. 16*7c478bd9Sstevel@tonic-gate * If applicable, add the following below this CDDL HEADER, with the 17*7c478bd9Sstevel@tonic-gate * fields enclosed by brackets "[]" replaced with your own identifying 18*7c478bd9Sstevel@tonic-gate * information: Portions Copyright [yyyy] [name of copyright owner] 19*7c478bd9Sstevel@tonic-gate * 20*7c478bd9Sstevel@tonic-gate * CDDL HEADER END 21*7c478bd9Sstevel@tonic-gate */ 22*7c478bd9Sstevel@tonic-gate /* 23*7c478bd9Sstevel@tonic-gate * Copyright (c) 1996-1998 by Sun Microsystems, Inc. 24*7c478bd9Sstevel@tonic-gate * All rights reserved. 25*7c478bd9Sstevel@tonic-gate */ 26*7c478bd9Sstevel@tonic-gate 27*7c478bd9Sstevel@tonic-gate /* LINTLIBRARY */ 28*7c478bd9Sstevel@tonic-gate 29*7c478bd9Sstevel@tonic-gate /* 30*7c478bd9Sstevel@tonic-gate * wio_get.c 31*7c478bd9Sstevel@tonic-gate * 32*7c478bd9Sstevel@tonic-gate * Wide I/O Library 33*7c478bd9Sstevel@tonic-gate * 34*7c478bd9Sstevel@tonic-gate * Copyright 1990, 1995 by Mortice Kern Systems Inc. All rights reserved. 35*7c478bd9Sstevel@tonic-gate * 36*7c478bd9Sstevel@tonic-gate */ 37*7c478bd9Sstevel@tonic-gate 38*7c478bd9Sstevel@tonic-gate #if M_RCSID 39*7c478bd9Sstevel@tonic-gate #ifndef lint 40*7c478bd9Sstevel@tonic-gate static char rcsID[] = 41*7c478bd9Sstevel@tonic-gate "$Header: /team/ps/sun_xcurses/archive/local_changes/xcurses/src/lib/" 42*7c478bd9Sstevel@tonic-gate "libxcurses/src/libc/wide/rcs/wio_get.c 1.3 1998/05/22 17:56:47 " 43*7c478bd9Sstevel@tonic-gate "cbates Exp $"; 44*7c478bd9Sstevel@tonic-gate #endif 45*7c478bd9Sstevel@tonic-gate #endif 46*7c478bd9Sstevel@tonic-gate 47*7c478bd9Sstevel@tonic-gate #include <mks.h> 48*7c478bd9Sstevel@tonic-gate #include <errno.h> 49*7c478bd9Sstevel@tonic-gate #include <m_wio.h> 50*7c478bd9Sstevel@tonic-gate 51*7c478bd9Sstevel@tonic-gate /* 52*7c478bd9Sstevel@tonic-gate * Return a wide character or WEOF for EOF or error. 53*7c478bd9Sstevel@tonic-gate * 54*7c478bd9Sstevel@tonic-gate * The function referenced by "get" is passed the pointer "object" 55*7c478bd9Sstevel@tonic-gate * and returns an input byte or EOF if no further data available. 56*7c478bd9Sstevel@tonic-gate * 57*7c478bd9Sstevel@tonic-gate * This mechanism is used to do conversions of byte strings or 58*7c478bd9Sstevel@tonic-gate * streams into wide characters without loss of information in the 59*7c478bd9Sstevel@tonic-gate * case of a bad multibyte character conversion. The bad multibyte 60*7c478bd9Sstevel@tonic-gate * sequence is passed through as individual bytes. 61*7c478bd9Sstevel@tonic-gate */ 62*7c478bd9Sstevel@tonic-gate wint_t m_wio_get(t_wide_io * wio)63*7c478bd9Sstevel@tonic-gatem_wio_get(t_wide_io *wio) 64*7c478bd9Sstevel@tonic-gate { 65*7c478bd9Sstevel@tonic-gate int ch; 66*7c478bd9Sstevel@tonic-gate wchar_t wc; 67*7c478bd9Sstevel@tonic-gate 68*7c478bd9Sstevel@tonic-gate if (wio == NULL || wio->get == (int (*)(void *)) NULL) { 69*7c478bd9Sstevel@tonic-gate errno = EINVAL; 70*7c478bd9Sstevel@tonic-gate return (-1); 71*7c478bd9Sstevel@tonic-gate } 72*7c478bd9Sstevel@tonic-gate 73*7c478bd9Sstevel@tonic-gate /* Do still have bytes available? */ 74*7c478bd9Sstevel@tonic-gate if (wio->_next < wio->_size) { 75*7c478bd9Sstevel@tonic-gate return ((wint_t)wio->_mb[wio->_next++]); 76*7c478bd9Sstevel@tonic-gate } 77*7c478bd9Sstevel@tonic-gate 78*7c478bd9Sstevel@tonic-gate /* Read in enough bytes to convert a multibyte character. */ 79*7c478bd9Sstevel@tonic-gate wio->_size = 0; 80*7c478bd9Sstevel@tonic-gate for (wio->_next = 0; wio->_next < (int)MB_CUR_MAX; ) { 81*7c478bd9Sstevel@tonic-gate if ((ch = (*wio->get)(wio->object)) == EOF) { 82*7c478bd9Sstevel@tonic-gate break; 83*7c478bd9Sstevel@tonic-gate } 84*7c478bd9Sstevel@tonic-gate 85*7c478bd9Sstevel@tonic-gate wio->_mb[wio->_next] = (unsigned char)ch; 86*7c478bd9Sstevel@tonic-gate 87*7c478bd9Sstevel@tonic-gate wio->_size = mbtowc(&wc, (char *)wio->_mb, wio->_next + 1); 88*7c478bd9Sstevel@tonic-gate 89*7c478bd9Sstevel@tonic-gate ++wio->_next; 90*7c478bd9Sstevel@tonic-gate 91*7c478bd9Sstevel@tonic-gate if (0 <= wio->_size) { 92*7c478bd9Sstevel@tonic-gate /* Remember the number of bytes converted. */ 93*7c478bd9Sstevel@tonic-gate wio->_size = wio->_next; 94*7c478bd9Sstevel@tonic-gate 95*7c478bd9Sstevel@tonic-gate return ((wint_t) wc); 96*7c478bd9Sstevel@tonic-gate } 97*7c478bd9Sstevel@tonic-gate } 98*7c478bd9Sstevel@tonic-gate 99*7c478bd9Sstevel@tonic-gate /* 100*7c478bd9Sstevel@tonic-gate * If we fill the multibyte character buffer or receive an 101*7c478bd9Sstevel@tonic-gate * EOF without recognising a multibyte character, then we 102*7c478bd9Sstevel@tonic-gate * will return individual bytes from the buffer. The buffer 103*7c478bd9Sstevel@tonic-gate * is restored to its state before the bogus byte sequence 104*7c478bd9Sstevel@tonic-gate * was read. 105*7c478bd9Sstevel@tonic-gate */ 106*7c478bd9Sstevel@tonic-gate wio->_size = wio->_next; 107*7c478bd9Sstevel@tonic-gate wio->_next = 0; 108*7c478bd9Sstevel@tonic-gate 109*7c478bd9Sstevel@tonic-gate return (0 < wio->_size ? (wint_t) wio->_mb[wio->_next++] : WEOF); 110*7c478bd9Sstevel@tonic-gate } 111