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

   1 /* $Id$
   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 by Ariadne
  11  *              2000: derived from ./itoa.c by ea
  12  */
  13 /* Copyright (C) 1995 DJ Delorie, see COPYING.DJ for details */
  14
  15 #include <precomp.h>
  16
  17 /*
  18  * @implemented
  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     _set_errno(EDOM);
  31     return 0;
  32   }
  33
  34   sign = (radix == 10 && value < 0);
  35   if (sign)
  36     v = -value;
  37   else
  38     v = (unsigned)value;
  39   while (v || tp == tmp) {
  40     i = v % radix;
  41     v = v / radix;
  42     if (i < 10)
  43       *tp++ = i+L'0';
  44     else
  45       *tp++ = i + L'a' - 10;
  46   }
  47
  48   if (string == 0)
  49     string = (wchar_t*)malloc(((tp-tmp)+sign+1)*sizeof(wchar_t));
  50   sp = string;
  51
  52   if (sign)
  53     *sp++ = L'-';
  54   while (tp > tmp)
  55     *sp++ = *--tp;
  56   *sp = 0;
  57   return string;
  58 }
  59
  60 /*
  61  * @implemented
  62  */
  63 wchar_t* _ui64tow(unsigned __int64 value, wchar_t* string, int radix)
  64 {
  65   wchar_t tmp[65];
  66   wchar_t* tp = tmp;
  67   long i;
  68   unsigned long v = value;
  69   wchar_t* sp;
  70
  71   if (radix > 36 || radix <= 1) {
  72     _set_errno(EDOM);
  73     return 0;
  74   }
  75
  76   while (v || tp == tmp) {
  77     i = v % radix;
  78     v = v / radix;
  79     if (i < 10)
  80       *tp++ = i+L'0';
  81     else
  82       *tp++ = i + L'a' - 10;
  83   }
  84
  85   if (string == 0)
  86     string = (wchar_t*)malloc(((tp-tmp)+1)*sizeof(wchar_t));
  87   sp = string;
  88
  89   while (tp > tmp)
  90     *sp++ = *--tp;
  91   *sp = 0;
  92   return string;
  93 }