kolibrios/programs/develop/open watcom/trunk/clib/convert/ltoa.c

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/****************************************************************************
*
* Open Watcom Project
*
* Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved.
*
* ========================================================================
*
* This file contains Original Code and/or Modifications of Original
* Code as defined in and that are subject to the Sybase Open Watcom
* Public License version 1.0 (the 'License'). You may not use this file
* except in compliance with the License. BY USING THIS FILE YOU AGREE TO
* ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is
* provided with the Original Code and Modifications, and is also
* available at www.sybase.com/developer/opensource.
*
* The Original Code and all software distributed under the License are
* distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
* EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM
* ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR
* NON-INFRINGEMENT. Please see the License for the specific language
* governing rights and limitations under the License.
*
* ========================================================================
*
* Description: Implementation of ltoa().
*
****************************************************************************/
#include "variety.h"
#include "widechar.h"
#include <stdlib.h>
extern const char __based(__segname("_CONST")) __Alphabet[];
unsigned long __uldiv( unsigned long, unsigned _WCNEAR * );
#if defined(__386__)
#pragma aux __uldiv = \
"xor edx,edx" \
"div dword ptr [ebx]" \
"mov [ebx],edx" \
parm caller [eax] [ebx] \
modify exact [eax edx] \
value [eax];
#elif defined(M_I86) && defined(__BIG_DATA__)
#pragma aux __uldiv = \
"xor cx,cx" \
"cmp dx,ss:[bx]" \
"jb short SMALL_ENOUGH" \
"xchg ax,dx" \
"xchg cx,dx" \
"div word ptr ss:[bx]" \
"xchg ax,cx" \
"SMALL_ENOUGH:" \
"div word ptr ss:[bx]" \
"mov ss:[bx],dx" \
"mov dx,cx" \
parm caller [ax dx] [bx] \
modify exact [ax cx dx] \
value [ax dx];
#elif defined(M_I86) && defined(__SMALL_DATA__)
#pragma aux __uldiv = \
"xor cx,cx" \
"cmp dx,[bx]" \
"jb short SMALL_ENOUGH" \
"xchg ax,dx" \
"xchg cx,dx" \
"div word ptr [bx]" \
"xchg ax,cx" \
"SMALL_ENOUGH:" \
"div word ptr [bx]" \
"mov [bx],dx" \
"mov dx,cx" \
parm caller [ax dx] [bx] \
modify exact [ax cx dx] \
value [ax dx];
#endif
_WCRTLINK CHAR_TYPE *__F_NAME(ultoa,_ultow)( unsigned long value, CHAR_TYPE *buffer, int radix )
{
CHAR_TYPE *p = buffer;
char *q;
unsigned rem;
char buf[34]; // only holds ASCII so 'char' is OK
buf[0] = '\0';
q = &buf[1];
do {
#if defined(_M_IX86) && defined(__WATCOMC__)
rem = radix;
value = __uldiv( value, (unsigned _WCNEAR *) &rem );
#else
rem = value % radix;
value = value / radix;
#endif
*q = __Alphabet[rem];
++q;
} while( value != 0 );
while( (*p++ = (CHAR_TYPE)*--q) )
;
return( buffer );
}
_WCRTLINK CHAR_TYPE *__F_NAME(ltoa,_ltow)( long value, CHAR_TYPE *buffer, int radix )
{
CHAR_TYPE *p = buffer;
if( radix == 10 ) {
if( value < 0 ) {
*p++ = '-';
value = - value;
}
}
__F_NAME(ultoa,_ultow)( value, p, radix );
return( buffer );
}