reactos/lib/string/wtoi64.c

   1 #include <string.h>
   2 #include <ctype.h>
   3
   4
   5 /*
   6  * @implemented
   7  */
   8 __int64
   9 _wtoi64 (const wchar_t *nptr)
  10 {
  11    int c;
  12    __int64 value;
  13    int sign;
  14
  15    while (iswctype((int)*nptr, _SPACE))
  16         ++nptr;
  17
  18    c = (int)*nptr++;
  19    sign = c;
  20    if (c == L'-' || c == L'+')
  21         c = (int)*nptr++;
  22
  23    value = 0;
  24
  25    while (iswctype(c, _DIGIT))
  26      {
  27         value = 10 * value + (c - L'0');
  28         c = (int)*nptr++;
  29      }
  30
  31    if (sign == L'-')
  32        return -value;
  33    else
  34        return value;
  35 }
  36
  37 /* EOF */