audk/MdePkg/Library/BaseDebugLibNull/DebugLib.c

/** @file
  Null Base Debug Library instance with empty functions.

  Copyright (c) 2006 - 2008, Intel Corporation
  All rights reserved. This program and the accompanying materials
  are licensed and made available under the terms and conditions of the BSD License
  which accompanies this distribution.  The full text of the license may be found at
  http://opensource.org/licenses/bsd-license.php

  THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.

**/


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

/**
  Prints a debug message to the debug output device if the specified error level is enabled.

  If any bit in ErrorLevel is also set in PcdDebugPrintErrorLevel, then print 
  the message specified by Format and the associated variable argument list to 
  the debug output device.

  @param  ErrorLevel  The error level of the debug message.
  @param  Format      Format string for the debug message to print.
  @param  ...         Variable argument list whose contents are accessed 
                      based on the format string specified by Format.

**/
VOID
EFIAPI
DebugPrint (
  IN  UINTN        ErrorLevel,
  IN  CONST CHAR8  *Format,
  ...
  )
{
}


/**
  Prints an assert message containing a filename, line number, and description.  
  This may be followed by a breakpoint or a dead loop.

  Print a message of the form "ASSERT <FileName>(<LineNumber>): <Description>\n" 
  to the debug output device.  If DEBUG_PROPERTY_ASSERT_BREAKPOINT_ENABLED bit of 
  PcdDebugProperyMask is set then CpuBreakpoint() is called. Otherwise, if 
  DEBUG_PROPERTY_ASSERT_DEADLOOP_ENABLED bit of PcdDebugProperyMask is set then 
  CpuDeadLoop() is called.  If neither of these bits are set, then this function 
  returns immediately after the message is printed to the debug output device.
  DebugAssert() must actively prevent recusrsion.  If DebugAssert() is called while
  processing another DebugAssert(), then DebugAssert() must return immediately.

  If FileName is NULL, then a <FileName> string of "(NULL) Filename" is printed.

  If Description is NULL, then a <Description> string of "(NULL) Description" is printed.

  @param  FileName     Pointer to the name of the source file that generated the assert condition.
  @param  LineNumber   The line number in the source file that generated the assert condition
  @param  Description  Pointer to the description of the assert condition.

**/
VOID
EFIAPI
DebugAssert (
  IN CONST CHAR8  *FileName,
  IN UINTN        LineNumber,
  IN CONST CHAR8  *Description
  )
{
}


/**
  Fills a target buffer with PcdDebugClearMemoryValue, and returns the target buffer.

  This function fills Length bytes of Buffer with the value specified by 
  PcdDebugClearMemoryValue, and returns Buffer.

  If Buffer is NULL, then ASSERT().

  If Length is greater than (MAX_ADDRESS - Buffer + 1), then ASSERT(). 

  @param   Buffer  Pointer to the target buffer to fill with PcdDebugClearMemoryValue.
  @param   Length  Number of bytes in Buffer to fill with zeros PcdDebugClearMemoryValue. 

  @return  Buffer filled with PcdDebugClearMemoryValue.

**/
VOID *
EFIAPI
DebugClearMemory (
  OUT VOID  *Buffer,
  IN UINTN  Length
  )
{
  return Buffer;
}


/**
  Returns TRUE if ASSERT() macros are enabled.

  This function returns TRUE if the DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of 
  PcdDebugProperyMask is set.  Otherwise FALSE is returned.

  @retval  TRUE    The DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of PcdDebugProperyMask is set.
  @retval  FALSE   The DEBUG_PROPERTY_DEBUG_ASSERT_ENABLED bit of PcdDebugProperyMask is clear.
  
  @return  Always return FALSE.

**/
BOOLEAN
EFIAPI
DebugAssertEnabled (
  VOID
  )
{
  return FALSE;
}


/**
  Returns TRUE if the DEBUG() macro is enabled.

  This function returns TRUE if the DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of 
  PcdDebugProperyMask is set.  Otherwise FALSE is returned.

  @retval  TRUE    The DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of PcdDebugProperyMask is set.
  @retval  FALSE   The DEBUG_PROPERTY_DEBUG_PRINT_ENABLED bit of PcdDebugProperyMask is clear.
  
  @return Always return FALSE.

**/
BOOLEAN
EFIAPI
DebugPrintEnabled (
  VOID
  )
{
  return FALSE;
}


/**
  Returns TRUE if the DEBUG_CODE() macros are enabled.

  This function returns TRUE if the DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of 
  PcdDebugProperyMask is set.  Otherwise FALSE is returned.

  @retval  TRUE    The DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is set.
  @retval  FALSE   The DEBUG_PROPERTY_DEBUG_CODE_ENABLED bit of PcdDebugProperyMask is clear.
  
  @return  Always return FALSE.

**/
BOOLEAN
EFIAPI
DebugCodeEnabled (
  VOID
  )
{
  return FALSE;
}


/**
  Returns TRUE if the DEBUG_CLEAR_MEMORY() macro is enabled.

  This function returns TRUE if the DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of 
  PcdDebugProperyMask is set.  Otherwise FALSE is returned.

  @retval  TRUE    The DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of PcdDebugProperyMask is set.
  @retval  FALSE   The DEBUG_PROPERTY_CLEAR_MEMORY_ENABLED bit of PcdDebugProperyMask is clear.
  
  @return  Always return FALSE.

**/
BOOLEAN
EFIAPI
DebugClearMemoryEnabled (
  VOID
  )
{
  return FALSE;
}