Function StrniCmp

rEFIt_UEFI/entry_scan/common.cpp:201–231

#define TO_LOWER(ch) (((ch >= L'A') && (ch <= L'Z')) ? ((ch - L'A') + L'a') : ch)
INTN StrniCmp(IN CONST CHAR16 *Str1,
              IN CONST CHAR16 *Str2,
              IN UINTN   Count)
{
  CHAR16 Ch1, Ch2;
  if (Count == 0) {
    return 0;
  }
  if (Str1 == NULL) {
    if (Str2 == NULL) {
      return 0;
    } else {
      return -1;
    }
  } else  if (Str2 == NULL) {
    return 1;
  }
  do {
    Ch1 = TO_LOWER(*Str1);
    Ch2 = TO_LOWER(*Str2);
    Str1++;
    Str2++;
    if (Ch1 != Ch2) {
      return (Ch1 - Ch2);
    }
    if (Ch1 == 0) {
      return 0;
    }
  } while (--Count > 0);
  return 0;
}

CONST CHAR16 *StriStr(IN CONST CHAR16 *Str,
                IN CONST CHAR16 *SearchFor)