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| Rev | Author | Line No. | Line |
|---|---|---|---|
| 553 | serge | 1 | /**************************************************************************** |
| 2 | * |
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| 3 | * Open Watcom Project |
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| 4 | * |
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| 5 | * Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved. |
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| 6 | * |
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| 7 | * ======================================================================== |
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| 8 | * |
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| 9 | * This file contains Original Code and/or Modifications of Original |
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| 10 | * Code as defined in and that are subject to the Sybase Open Watcom |
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| 11 | * Public License version 1.0 (the 'License'). You may not use this file |
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| 12 | * except in compliance with the License. BY USING THIS FILE YOU AGREE TO |
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| 13 | * ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is |
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| 14 | * provided with the Original Code and Modifications, and is also |
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| 15 | * available at www.sybase.com/developer/opensource. |
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| 16 | * |
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| 17 | * The Original Code and all software distributed under the License are |
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| 18 | * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
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| 19 | * EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM |
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| 20 | * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF |
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| 21 | * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR |
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| 22 | * NON-INFRINGEMENT. Please see the License for the specific language |
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| 23 | * governing rights and limitations under the License. |
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| 24 | * |
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| 25 | * ======================================================================== |
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| 26 | * |
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| 27 | * Description: Implementation of strerror_s() - bounds checking strerror(). |
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| 28 | * |
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| 29 | ****************************************************************************/ |
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| 30 | |||
| 31 | |||
| 32 | #include "variety.h" |
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| 33 | #include "saferlib.h" |
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| 34 | #include "widechar.h" |
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| 35 | #include |
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| 36 | #include |
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| 37 | #include |
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| 38 | #include "errstr.h" |
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| 39 | |||
| 40 | |||
| 41 | _WCRTLINK errno_t __F_NAME(strerror_s,wcserror_s)( CHAR_TYPE *s, |
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| 42 | rsize_t maxsize, |
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| 43 | errno_t errnum ) |
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| 44 | /*****************************************************************/ |
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| 45 | { |
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| 46 | errno_t rc = -1; |
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| 47 | |||
| 48 | #ifdef __WIDECHAR__ |
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| 49 | wchar_t Wide_Error_String[ 128 ]; |
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| 50 | #endif |
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| 51 | char *msg; |
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| 52 | CHAR_TYPE *p; |
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| 53 | CHAR_TYPE *p2; |
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| 54 | size_t msglen; |
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| 55 | int k; |
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| 56 | |||
| 57 | /* runtime-constraints */ |
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| 58 | // s not NULL |
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| 59 | // maxsize <= RSIZE_MAX |
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| 60 | // maxsize != 0 |
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| 61 | if( __check_constraint_nullptr( s ) && |
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| 62 | __check_constraint_maxsize( maxsize ) && |
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| 63 | __check_constraint_zero( maxsize ) ) { |
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| 64 | |||
| 65 | if( errnum < 0 || errnum >= _sys_nerr ) { |
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| 66 | msg = UNKNOWN_ERROR; |
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| 67 | } else { |
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| 68 | msg = _sys_errlist[ errnum ]; |
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| 69 | } |
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| 70 | |||
| 71 | msglen = strlen( msg ); |
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| 72 | |||
| 73 | #ifdef __WIDECHAR__ |
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| 74 | _AToUni( Wide_Error_String, msg ); |
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| 75 | p2 = Wide_Error_String; |
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| 76 | #else |
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| 77 | p2 = msg; |
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| 78 | #endif |
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| 79 | p = s; |
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| 80 | k = 0; |
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| 81 | // copy string up to end of string or end of receiving field |
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| 82 | while ( (k < maxsize - 1) && (*p2 != NULLCHAR) ) { |
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| 83 | *p++ = *p2++; |
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| 84 | ++k; |
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| 85 | }; |
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| 86 | |||
| 87 | if( (maxsize > 3) && (msglen > maxsize - 4) ) { |
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| 88 | /* msg does not fit, indicate it's incomplete */ |
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| 89 | /* and terminate string */ |
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| 90 | __F_NAME(strcpy,wcscpy)( p - 3, STRING( "..." ) ); |
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| 91 | } else { |
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| 92 | *p = NULLCHAR; // terminate string |
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| 93 | } |
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| 94 | if( msglen < maxsize) { |
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| 95 | rc = 0; // msg not truncated |
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| 96 | } |
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| 97 | } |
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| 98 | return( rc ); |
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| 99 | } |