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 2004 Sun Microsystems, Inc. All rights reserved. 24 * Use is subject to license terms. 25 */ 26 27 #pragma ident "%Z%%M% %I% %E% SMI" 28 29 /* Copyright (c) 1986 AT&T */ 30 /* All Rights Reserved */ 31 32 33 #include "synonyms.h" 34 #include "file64.h" 35 #include <stdio.h> 36 #include <stdarg.h> 37 #include <stdlib.h> 38 #include <widec.h> 39 #include <string.h> 40 #include "libc.h" 41 #include "stdiom.h" 42 43 /* 44 * wsscanf -- this function will read wchar_t characters from 45 * wchar_t string according to the conversion format. 46 * Note that the performance degrades if the intermediate 47 * result of conversion exceeds 1024 bytes due to the 48 * use of malloc() on each call. 49 * We should implement wchar_t version of doscan() 50 * for better performance. 51 */ 52 #define MAXINSTR 1024 53 54 int 55 wsscanf(wchar_t *string, const char *format, ...) 56 { 57 va_list ap; 58 size_t i; 59 char stackbuf[MAXINSTR]; 60 char *tempstring = stackbuf; 61 size_t malloced = 0; 62 int j; 63 64 i = wcstombs(tempstring, string, MAXINSTR); 65 if (i == (size_t)-1) 66 return (-1); 67 68 if (i == MAXINSTR) { /* The buffer was too small. Malloc it. */ 69 tempstring = malloc(malloced = MB_CUR_MAX*wcslen(string)+1); 70 if (tempstring == 0) 71 return (-1); 72 i = wcstombs(tempstring, string, malloced); /* Try again. */ 73 if (i == (size_t)-1) { 74 free(tempstring); 75 return (-1); 76 } 77 } 78 79 va_start(ap, format); 80 j = vsscanf(tempstring, format, ap); 81 va_end(ap); 82 if (malloced) free(tempstring); 83 return (j); 84 } 85