Example #1
0
uint16_t *
u16_chr (const uint16_t *s, size_t n, ucs4_t uc)
{
  uint16_t c[2];

  if (uc < 0x10000)
    {
      uint16_t c0 = uc;

      for (; n > 0; s++, n--)
        {
          if (*s == c0)
            return (uint16_t *) s;
        }
    }
  else
    switch (u16_uctomb_aux (c, uc, 2))
      {
      case 2:
        if (n > 1)
          {
            uint16_t c0 = c[0];
            uint16_t c1 = c[1];

            for (n--; n > 0; s++, n--)
              {
                if (*s == c0 && s[1] == c1)
                  return (uint16_t *) s;
              }
          }
        break;
      }
  return NULL;
}
Example #2
0
uint16_t *
u16_strrchr (const uint16_t *s, ucs4_t uc)
{
  /* Calling u16_strlen and then searching from the other end would cause more
     memory accesses. Avoid that, at the cost of a few more comparisons.  */
  uint16_t *result = NULL;
  uint16_t c[2];

  if (uc < 0x10000)
    {
      uint16_t c0 = uc;

      for (;; s++)
        {
          if (*s == c0)
            result = (uint16_t *) s;
          if (*s == 0)
            break;
        }
    }
  else
    switch (u16_uctomb_aux (c, uc, 2))
      {
      case 2:
        if (*s)
          {
            uint16_t c0 = c[0];
            uint16_t c1 = c[1];

            /* FIXME: Maybe walking the string via u16_mblen is a win?  */
            for (;; s++)
              {
                if (s[1] == 0)
                  break;
                if (*s == c0 && s[1] == c1)
                  result = (uint16_t *) s;
              }
          }
        break;
      }
  return result;
}
uint16_t *
u16_strchr (const uint16_t *s, ucs4_t uc)
{
  uint16_t c[2];

  if (uc < 0x10000)
    {
      uint16_t c0 = uc;

      for (;; s++)
        {
          if (*s == c0)
            break;
          if (*s == 0)
            goto notfound;
        }
      return (uint16_t *) s;
    }
  else
    switch (u16_uctomb_aux (c, uc, 2))
      {
      case 2:
        if (*s == 0)
          goto notfound;
        {
          uint16_t c0 = c[0];
          uint16_t c1 = c[1];

          for (;; s++)
            {
              if (s[1] == 0)
                goto notfound;
              if (*s == c0 && s[1] == c1)
                break;
            }
          return (uint16_t *) s;
        }
      }
notfound:
  return NULL;
}