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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: WHEN YOU FIGURE OUT WHAT THIS FILE DOES, PLEASE |
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| 28 | * DESCRIBE IT HERE! |
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| 29 | * |
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| 30 | ****************************************************************************/ |
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| 31 | |||
| 32 | |||
| 33 | #include "variety.h" |
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| 34 | #include |
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| 35 | |||
| 36 | #ifdef M_I86 |
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| 37 | |||
| 38 | extern char _WCFAR *fast_strncpy( char _WCFAR *, const char _WCFAR *, size_t ); |
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| 39 | |||
| 40 | #pragma aux fast_strncpy = \ |
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| 41 | 0x1e /* push ds */\ |
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| 42 | 0x96 /* xchg si,ax */\ |
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| 43 | 0x8e 0xd8 /* mov ds,ax */\ |
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| 44 | 0x57 /* push di */\ |
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| 45 | 0xac /* L1: lodsb */\ |
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| 46 | 0xaa /* stosb */\ |
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| 47 | 0x84 0xc0 /* test al,al */\ |
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| 48 | 0xe0 0xfa /* loopne L1 */\ |
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| 49 | 0x31 0xc0 /* xor ax,ax */\ |
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| 50 | 0xd1 0xe9 /* shr cx,1 */\ |
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| 51 | 0xf3 0xab /* rep stosw */\ |
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| 52 | 0x11 0xc9 /* adc cx,cx */\ |
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| 53 | 0xf3 0xaa /* rep stosb */\ |
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| 54 | 0x58 /* pop ax */\ |
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| 55 | 0x1f /* pop ds */\ |
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| 56 | parm caller [es di] [si ax] [cx]\ |
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| 57 | value [es ax] \ |
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| 58 | modify exact [ax cx si di]; |
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| 59 | #endif |
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| 60 | |||
| 61 | _WCRTLINK char _WCFAR *_fstrncpy( char _WCFAR *dst, const char _WCFAR *src, size_t len ) |
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| 62 | { |
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| 63 | #ifdef M_I86 |
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| 64 | if( len ) { |
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| 65 | return( fast_strncpy( dst, src, len ) ); |
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| 66 | } |
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| 67 | return( dst ); |
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| 68 | #else |
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| 69 | char _WCFAR *ret; |
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| 70 | |||
| 71 | ret = dst; |
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| 72 | for(;len; --len ) { |
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| 73 | if( *src == '\0' ) break; |
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| 74 | *dst++ = *src++; |
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| 75 | } |
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| 76 | while( len != 0 ) { |
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| 77 | *dst++ = '\0'; /* pad destination string with null chars */ |
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| 78 | --len; |
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| 79 | } |
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| 80 | return( ret ); |
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| 81 | #endif |
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| 82 | } |