wcio.c (1723B)
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) 2005 Gunnar Ritter, Freiburg i. Br., Germany 24 * 25 * Sccsid @(#)wcio.c 1.1 (gritter) 6/25/05 26 */ 27 #include <stdlib.h> 28 #include <wchar.h> 29 #include <stdio.h> 30 #include <limits.h> 31 #include <errno.h> 32 33 extern int error(char *, ...); 34 35 /* 36 * This is like getwc() but issues an error message when an illegal 37 * byte sequence is encountered. 38 */ 39 wint_t 40 lex_getwc(FILE *fp) 41 { 42 wint_t wc; 43 44 if ((wc = getwc(fp)) != WEOF) 45 return wc; 46 if (ferror(fp) && errno == EILSEQ) 47 error("illegal byte sequence"); 48 return wc; 49 } 50 51 /* 52 * A substitute for putwc(), to ensure that stdio output FILE objects 53 * are always byte-oriented. 54 */ 55 wint_t 56 lex_putwc(wchar_t wc, FILE *fp) 57 { 58 char mb[MB_LEN_MAX]; 59 int i, n; 60 61 if ((n = wctomb(mb, wc)) < 0) { 62 wctomb(mb, 0); 63 errno = EILSEQ; 64 return WEOF; 65 } 66 for (i = 0; i < n; i++) 67 if (putc(mb[i]&0377, fp) == EOF) 68 return WEOF; 69 return wc; 70 }