reactos/sdk/lib/crt/string/witow.c

92 lines
1.7 KiB
C

/*
* COPYRIGHT: See COPYING in the top level directory
* PROJECT: ReactOS system libraries
* FILE: lib/sdk/crt/string/witow.c
* PURPOSE: converts a integer to wchar_t
* PROGRAMER:
* UPDATE HISTORY:
* 1995: Created
* 1998: Added ltoa by Ariadne
* 2000: derived from ./itoa.c by ea
*/
/* Copyright (C) 1995 DJ Delorie, see COPYING.DJ for details */
#include <precomp.h>
/*
* @implemented
*/
wchar_t* _i64tow(__int64 value, wchar_t* string, int radix)
{
wchar_t tmp[65];
wchar_t* tp = tmp;
int i;
unsigned v;
int sign;
wchar_t* sp;
if (radix > 36 || radix <= 1) {
_set_errno(EDOM);
return 0;
}
sign = (radix == 10 && value < 0);
if (sign)
v = -value;
else
v = (unsigned)value;
while (v || tp == tmp) {
i = v % radix;
v = v / radix;
if (i < 10)
*tp++ = i+L'0';
else
*tp++ = i + L'a' - 10;
}
if (string == 0)
string = (wchar_t*)malloc(((tp-tmp)+sign+1)*sizeof(wchar_t));
sp = string;
if (sign)
*sp++ = L'-';
while (tp > tmp)
*sp++ = *--tp;
*sp = 0;
return string;
}
/*
* @implemented
*/
wchar_t* _ui64tow(unsigned __int64 value, wchar_t* string, int radix)
{
wchar_t tmp[65];
wchar_t* tp = tmp;
long i;
unsigned long v = value;
wchar_t* sp;
if (radix > 36 || radix <= 1) {
_set_errno(EDOM);
return 0;
}
while (v || tp == tmp) {
i = v % radix;
v = v / radix;
if (i < 10)
*tp++ = i+L'0';
else
*tp++ = i + L'a' - 10;
}
if (string == 0)
string = (wchar_t*)malloc(((tp-tmp)+1)*sizeof(wchar_t));
sp = string;
while (tp > tmp)
*sp++ = *--tp;
*sp = 0;
return string;
}