sdk/lib/crt/string/witow.c

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