audk/EmbeddedPkg/Library/FdtLib/fdt_strtoul.c

#/* @file
#  Copyright (c) 2018, Linaro Limited. All rights reserved.
#
#  SPDX-License-Identifier: BSD-2-Clause-Patent
#
#*/

#include <Base.h>
#include <Library/BaseLib.h>
#include <Library/DebugLib.h>

unsigned long strtoul(const char *nptr, char **endptr, int base)
{
    RETURN_STATUS   Status;
    UINTN           ReturnValue;

    ASSERT (base == 10 || base == 16);

    if (base == 10) {
      Status = AsciiStrDecimalToUintnS (nptr, endptr, &ReturnValue);
    } else if (base == 16) {
      Status = AsciiStrHexToUintnS (nptr, endptr, &ReturnValue);
    } else {
      Status = RETURN_INVALID_PARAMETER;
    }

    if (RETURN_ERROR (Status)) {
      return MAX_UINTN;
    }

    return ReturnValue;
}