reactos/lib/msvcrt/stdlib/witow.c

   1 /* $Id: witow.c,v 1.1 2002/11/24 18:42:25 robd Exp $
   2  *
   3  * COPYRIGHT:   See COPYING in the top level directory
   4  * PROJECT:     ReactOS system libraries
   5  * FILE:        lib/msvcrt/stdlib/itow.c
   6  * PURPOSE:     converts a integer to wchar_t
   7  * PROGRAMER:
   8  * UPDATE HISTORY:
   9  *              1995: Created
  10  *              1998: Added ltoa Boudewijn Dekker
  11  *              2000: derived from ./itoa.c by ea
  12  */
  13 /* Copyright (C) 1995 DJ Delorie, see COPYING.DJ for details */
  14
  15 #include <msvcrt/errno.h>
  16 #include <msvcrt/stdlib.h>
  17 #include <msvcrt/internal/file.h>
  18
  19
  20 wchar_t* _i64tow(__int64 value, wchar_t* string, int radix)
  21 {
  22   wchar_t tmp[65];
  23   wchar_t* tp = tmp;
  24   int i;
  25   unsigned v;
  26   int sign;
  27   wchar_t* sp;
  28
  29   if (radix > 36 || radix <= 1)
  30   {
  31     __set_errno(EDOM);
  32     return 0;
  33   }
  34
  35   sign = (radix == 10 && value < 0);
  36   if (sign)
  37     v = -value;
  38   else
  39     v = (unsigned)value;
  40   while (v || tp == tmp)
  41   {
  42     i = v % radix;
  43     v = v / radix;
  44     if (i < 10)
  45       *tp++ = i+L'0';
  46     else
  47       *tp++ = i + L'a' - 10;
  48   }
  49
  50   if (string == 0)
  51     string = (wchar_t*)malloc(((tp-tmp)+sign+1)*sizeof(wchar_t));
  52   sp = string;
  53
  54   if (sign)
  55     *sp++ = L'-';
  56   while (tp > tmp)
  57     *sp++ = *--tp;
  58   *sp = 0;
  59   return string;
  60 }
  61
  62 wchar_t* _ui64tow(unsigned __int64 value, wchar_t* string, int radix)
  63 {
  64   wchar_t tmp[65];
  65   wchar_t* tp = tmp;
  66   long i;
  67   unsigned long v = value;
  68   wchar_t* sp;
  69
  70   if (radix > 36 || radix <= 1)
  71   {
  72     __set_errno(EDOM);
  73     return 0;
  74   }
  75
  76   while (v || tp == tmp)
  77   {
  78     i = v % radix;
  79     v = v / radix;
  80     if (i < 10)
  81       *tp++ = i+L'0';
  82     else
  83       *tp++ = i + L'a' - 10;
  84   }
  85
  86   if (string == 0)
  87     string = (wchar_t*)malloc(((tp-tmp)+1)*sizeof(wchar_t));
  88   sp = string;
  89
  90   while (tp > tmp)
  91     *sp++ = *--tp;
  92   *sp = 0;
  93   return string;
  94 }