audk/MdePkg/Include/Library/PrintLib.h

/** @file
  Provides services to print a formatted string to a buffer. All combinations of
  Unicode and ASCII strings are supported.

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.

  The Print Library functions provide a simple means to produce formatted output 
  strings.  Many of the output functions use a format string to describe how to 
  format the output of variable arguments.  The format string consists of normal 
  text and argument descriptors.  There are no restrictions for how the normal 
  text and argument descriptors can be mixed.  A normal text character '\n' must 
  always be converted to '\n\r'.  This does not follow the ANSI C standard for 
  sprint().  The format of argument descriptors is described below.  The ANSI C 
  standard for sprint() has been followed for some of the format types, and has 
  not been followed for others.  The exceptions are noted below.

    %[flags][width][.precision]type

  [flags]:
    - -	      
      - The field is left justified.  If not flag is not specified, then the 
        field is right justified.
    - space	  
      - Prefix a space character to a number.  Only valid for types X, x, and d.
    - +	
      - Prefix a plus character to a number.  Only valid for types X, x, and d.  
        If both space and + are specified, then space is ignored.
    - 0
      - Pad with 0 characters to the left of a number.  Only valid for types 
        X, x, and d.
    - ,
      - Place a comma every 3rd digit of the number.  Only valid for type d.
        If 0 is also specified, then 0 is ignored.
    - L, l
      - The number being printed is a UINT64.  Only valid for types X, x, and d.
        If this flag is not specified, then the number being printed is a int.
    - NOTE: All invalid flags are ignored.

  [width]:

    - *
      - The width of the field is specified by a UINTN argument in the 
        argument list.
    - number
      - The number specified as a decimal value represents the width of 
        the field.
    - NOTE: If [width] is not specified, then a field width of 0 is assumed.

  [.precision]:

    - *
      - The prevision of the field is specified by a UINTN argument in the 
        argument list.
    - number
      - The number specified as a decimal value represents the precision of 
        the field.
    - NOTE: If [.precision] is not specified, then a precision of 0 is assumed.

  type:

    - %
      - Print a %%.
    - c
      - The argument is a Unicode character.  ASCII characters can be printed 
        using this type too by making sure bits 8..15 of the argument are set to 0.
    - x
      - The argument is a hexadecimal number.  The characters used are 0..9 and 
        A..F.  If the flag <EFBFBD>L<EFBFBD> is not specified, then the argument is assumed 
        to be an int.  This does not follow ANSI C.
    - X
      - The argument is a hexadecimal number and the number is padded with 
        zeros.  This is equivalent to a format string of <EFBFBD>0x<EFBFBD>.  If the flag 
        'L' is not specified, then the argument is assumed to be an int.  
        This does not follow ANSI C.
    - d
      - The argument is a decimal number.  If the flag 'L' is not specified, 
        then the argument is assumed to be an int.  
    - p
      - The argument is a pointer that is a (VOID *), and it is printed as a 
        hexadecimal number  The characters used are 0..9 and A..F.
    - a
      - The argument is a pointer to an ASCII string.  
        This does not follow ANSI C.
    - S, s
      - The argument is a pointer to a Unicode string.  
        This does not follow ANSI C.
    - g
      - The argument is a pointer to a GUID structure.  The GUID is printed 
        in the format XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX.  
        This does not follow ANSI C.
    - t
      - The argument is a pointer to an EFI_TIME structure.  The time and 
        date are printed in the format <EFBFBD>mm/dd/yyyy  hh:mm<EFBFBD>, where mm is the 
        month zero padded, dd is the day zero padded, yyyy is the year zero 
        padded, hh is the hour zero padded, and mm is minutes zero padded.  
        This does not follow ANSI C. 
    - r
      - The argument is a RETURN_STATUS value.  This value is converted to 
        a string following the table below.  This does not follow ANSI C. 
      - RETURN_SUCCESS               
        - "Success"
      - RETURN_LOAD_ERROR            
        - "Load Error"
      - RETURN_INVALID_PARAMETER     
        - "Invalid Parameter"
      - RETURN_UNSUPPORTED           
        - "Unsupported"
      - RETURN_BAD_BUFFER_SIZE       
        - "Bad Buffer Size"
      - RETURN_BUFFER_TOO_SMALL      
        - "Buffer Too Small"
      - RETURN_NOT_READY             
        - "Not Ready"
      - RETURN_DEVICE_ERROR          
        - "Device Error"
      - RETURN_WRITE_PROTECTED       
        - "Write Protected"
      - RETURN_OUT_OF_RESOURCES      
        - "Out of Resources"
      - RETURN_VOLUME_CORRUPTED      
        - "Volume Corrupt"
      - RETURN_VOLUME_FULL           
        - "Volume Full"
      - RETURN_NO_MEDIA              
        - "No Media"
      - RETURN_MEDIA_CHANGED         
        - "Media changed"
      - RETURN_NOT_FOUND             
        - "Not Found"
      - RETURN_ACCESS_DENIED         
        - "Access Denied"
      - RETURN_NO_RESPONSE           
        - "No Response"
      - RETURN_NO_MAPPING            
        - "No mapping"
      - RETURN_TIMEOUT               
        - "Time out"
      - RETURN_NOT_STARTED           
        - "Not started"
      - RETURN_ALREADY_STARTED       
        - "Already started"
      - RETURN_ABORTED               
        - "Aborted"
      - RETURN_ICMP_ERROR            
        - "ICMP Error"
      - RETURN_TFTP_ERROR            
        - "TFTP Error"
      - RETURN_PROTOCOL_ERROR        
        - "Protocol Error"
      - RETURN_WARN_UNKNOWN_GLYPH    
        - "Warning Unknown Glyph"
      - RETURN_WARN_DELETE_FAILURE   
        - "Warning Delete Failure"
      - RETURN_WARN_WRITE_FAILURE    
        - "Warning Write Failure"
      - RETURN_WARN_BUFFER_TOO_SMALL 
        - "Warning Buffer Too Small"

**/

#ifndef __PRINT_LIB_H__
#define __PRINT_LIB_H__

///
/// Define the maximum number of characters that are required to
/// encode a decimal, hexidecimal, GUID, or TIME value with a NULL 
/// terminator.
///  
///  Maximum Length Decimal String     = 28
///    "-9,223,372,036,854,775,808"
///  Maximum Length Hexidecimal String = 17
///    "FFFFFFFFFFFFFFFF"
///  Maximum Length GUID               = 37
///    "00000000-0000-0000-0000-000000000000"
///  Maximum Length TIME               = 18
///    "12/12/2006  12:12"
///
#define MAXIMUM_VALUE_CHARACTERS  38

///
/// Flags bitmask values use in UnicodeValueToString() and 
/// AsciiValueToString()
///
#define LEFT_JUSTIFY      0x01
#define COMMA_TYPE        0x08
#define PREFIX_ZERO       0x20
#define RADIX_HEX         0x80

/**
  Produces a Null-terminated Unicode string in an output buffer based on 
  a Null-terminated Unicode format string and a VA_LIST argument list
  
  Produces a Null-terminated Unicode string in the output buffer specified by StartOfBuffer
  and BufferSize.  
  The Unicode string is produced by parsing the format string specified by FormatString.  
  Arguments are pulled from the variable argument list specified by Marker based on the 
  contents of the format string.  
  The number of Unicode characters in the produced output buffer is returned not including
  the Null-terminator.
  If BufferSize is 0 or 1, then no output buffer is produced and 0 is returned.

  If BufferSize > 1 and StartOfBuffer is NULL, then ASSERT().
  If BufferSize > 1 and StartOfBuffer is not aligned on a 16-bit boundary, then ASSERT().
  If BufferSize > 1 and FormatString is NULL, then ASSERT().
  If BufferSize > 1 and FormatString is not aligned on a 16-bit boundary, then ASSERT().
  If PcdMaximumUnicodeStringLength is not zero, and FormatString contains more than 
  PcdMaximumUnicodeStringLength Unicode characters not including the Null-terminator, then
  ASSERT().
  If PcdMaximumUnicodeStringLength is not zero, and produced Null-terminated Unicode string
  contains more than PcdMaximumUnicodeStringLength Unicode characters not including the
  Null-terminator, then ASSERT().

  @param  StartOfBuffer   A pointer to the output buffer for the produced Null-terminated 
                          Unicode string.
  @param  BufferSize      The size, in bytes, of the output buffer specified by StartOfBuffer.
  @param  FormatString    Null-terminated Unicode format string.
  @param  Marker          VA_LIST marker for the variable argument list.
  
  @return The number of Unicode characters in the produced output buffer not including the
          Null-terminator.

**/
UINTN
EFIAPI
UnicodeVSPrint (
  OUT CHAR16        *StartOfBuffer,
  IN  UINTN         BufferSize,
  IN  CONST CHAR16  *FormatString,
  IN  VA_LIST       Marker
  );

/**
  Produces a Null-terminated Unicode string in an output buffer based on a Null-terminated 
  Unicode format string and variable argument list.
  
  Produces a Null-terminated Unicode string in the output buffer specified by StartOfBuffer
  and BufferSize.
  The Unicode string is produced by parsing the format string specified by FormatString.
  Arguments are pulled from the variable argument list based on the contents of the format string.
  The number of Unicode characters in the produced output buffer is returned not including
  the Null-terminator.
  If BufferSize is 0 or 1, then no output buffer is produced and 0 is returned.

  If BufferSize > 1 and StartOfBuffer is NULL, then ASSERT().
  If BufferSize > 1 and StartOfBuffer is not aligned on a 16-bit boundary, then ASSERT().
  If BufferSize > 1 and FormatString is NULL, then ASSERT().
  If BufferSize > 1 and FormatString is not aligned on a 16-bit boundary, then ASSERT().
  If PcdMaximumUnicodeStringLength is not zero, and FormatString contains more than 
  PcdMaximumUnicodeStringLength Unicode characters not including the Null-terminator, then
  ASSERT().
  If PcdMaximumUnicodeStringLength is not zero, and produced Null-terminated Unicode string
  contains more than PcdMaximumUnicodeStringLength Unicode characters not including the
  Null-terminator, then ASSERT().

  @param  StartOfBuffer   A pointer to the output buffer for the produced Null-terminated 
                          Unicode string.
  @param  BufferSize      The size, in bytes, of the output buffer specified by StartOfBuffer.
  @param  FormatString    Null-terminated Unicode format string.
  @param  ...             Variable argument list whose contents are accessed based on the 
                          format string specified by FormatString.
  
  @return The number of Unicode characters in the produced output buffer not including the
          Null-terminator.

**/
UINTN
EFIAPI
UnicodeSPrint (
  OUT CHAR16        *StartOfBuffer,
  IN  UINTN         BufferSize,
  IN  CONST CHAR16  *FormatString,
  ...
  );

/**
  Produces a Null-terminated Unicode string in an output buffer based on a Null-terminated
  ASCII format string and a VA_LIST argument list
  
  Produces a Null-terminated Unicode string in the output buffer specified by StartOfBuffer
  and BufferSize.
  The Unicode string is produced by parsing the format string specified by FormatString.
  Arguments are pulled from the variable argument list specified by Marker based on the 
  contents of the format string.
  The number of Unicode characters in the produced output buffer is returned not including
  the Null-terminator.
  If BufferSize is 0 or 1, then no output buffer is produced and 0 is returned.

  If BufferSize > 1 and StartOfBuffer is NULL, then ASSERT().
  If BufferSize > 1 and StartOfBuffer is not aligned on a 16-bit boundary, then ASSERT().
  If BufferSize > 1 and FormatString is NULL, then ASSERT().
  If PcdMaximumAsciiStringLength is not zero, and FormatString contains more than
  PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, then
  ASSERT().
  If PcdMaximumUnicodeStringLength is not zero, and produced Null-terminated Unicode string
  contains more than PcdMaximumUnicodeStringLength Unicode characters not including the
  Null-terminator, then ASSERT().

  @param  StartOfBuffer   A pointer to the output buffer for the produced Null-terminated 
                          Unicode string.
  @param  BufferSize      The size, in bytes, of the output buffer specified by StartOfBuffer.
  @param  FormatString    Null-terminated ASCII format string.
  @param  Marker          VA_LIST marker for the variable argument list.
  
  @return The number of Unicode characters in the produced output buffer not including the
          Null-terminator.

**/
UINTN
EFIAPI
UnicodeVSPrintAsciiFormat (
  OUT CHAR16       *StartOfBuffer,
  IN  UINTN        BufferSize,
  IN  CONST CHAR8  *FormatString,
  IN  VA_LIST      Marker
  );

/**
  Produces a Null-terminated Unicode string in an output buffer based on a Null-terminated 
  ASCII format string and  variable argument list.
  
  Produces a Null-terminated Unicode string in the output buffer specified by StartOfBuffer
  and BufferSize.
  The Unicode string is produced by parsing the format string specified by FormatString.
  Arguments are pulled from the variable argument list based on the contents of the 
  format string.
  The number of Unicode characters in the produced output buffer is returned not including
  the Null-terminator.
  If BufferSize is 0 or 1, then no output buffer is produced and 0 is returned.

  If BufferSize > 1 and StartOfBuffer is NULL, then ASSERT().
  If BufferSize > 1 and StartOfBuffer is not aligned on a 16-bit boundary, then ASSERT().
  If BufferSize > 1 and FormatString is NULL, then ASSERT().
  If PcdMaximumAsciiStringLength is not zero, and FormatString contains more than
  PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, then
  ASSERT().
  If PcdMaximumUnicodeStringLength is not zero, and produced Null-terminated Unicode string
  contains more than PcdMaximumUnicodeStringLength Unicode characters not including the
  Null-terminator, then ASSERT().

  @param  StartOfBuffer   A pointer to the output buffer for the produced Null-terminated 
                          Unicode string.
  @param  BufferSize      The size, in bytes, of the output buffer specified by StartOfBuffer.
  @param  FormatString    Null-terminated ASCII format string.
  @param  ...             Variable argument list whose contents are accessed based on the 
                          format string specified by FormatString.
  
  @return The number of Unicode characters in the produced output buffer not including the
          Null-terminator.

**/
UINTN
EFIAPI
UnicodeSPrintAsciiFormat (
  OUT CHAR16       *StartOfBuffer,
  IN  UINTN        BufferSize,
  IN  CONST CHAR8  *FormatString,
  ...
  );

/**
  Converts a decimal value to a Null-terminated Unicode string.
  
  Converts the decimal number specified by Value to a Null-terminated Unicode 
  string specified by Buffer containing at most Width characters. No padding of spaces 
  is ever performed. If Width is 0 then a width of MAXIMUM_VALUE_CHARACTERS is assumed.
  The number of Unicode characters in Buffer is returned not including the Null-terminator.
  If the conversion contains more than Width characters, then only the first
  Width characters are returned, and the total number of characters 
  required to perform the conversion is returned.
  Additional conversion parameters are specified in Flags.  
  
  The Flags bit LEFT_JUSTIFY is always ignored.
  All conversions are left justified in Buffer.
  If Width is 0, PREFIX_ZERO is ignored in Flags.
  If COMMA_TYPE is set in Flags, then PREFIX_ZERO is ignored in Flags, and commas
  are inserted every 3rd digit starting from the right.
  If HEX_RADIX is set in Flags, then the output buffer will be 
  formatted in hexadecimal format.
  If Value is < 0 and HEX_RADIX is not set in Flags, then the fist character in Buffer is a '-'.
  If PREFIX_ZERO is set in Flags and PREFIX_ZERO is not being ignored, 
  then Buffer is padded with '0' characters so the combination of the optional '-' 
  sign character, '0' characters, digit characters for Value, and the Null-terminator
  add up to Width characters.
  If both COMMA_TYPE and HEX_RADIX are set in Flags, then ASSERT().
  If Buffer is NULL, then ASSERT().
  If Buffer is not aligned on a 16-bit boundary, then ASSERT().
  If unsupported bits are set in Flags, then ASSERT().
  If both COMMA_TYPE and HEX_RADIX are set in Flags, then ASSERT().
  If Width >= MAXIMUM_VALUE_CHARACTERS, then ASSERT()

  @param  Buffer  Pointer to the output buffer for the produced Null-terminated
                  Unicode string.
  @param  Flags   The bitmask of flags that specify left justification, zero pad, and commas.
  @param  Value   The 64-bit signed value to convert to a string.
  @param  Width   The maximum number of Unicode characters to place in Buffer, not including
                  the Null-terminator.
  
  @return The number of Unicode characters in Buffer not including the Null-terminator.

**/
UINTN
EFIAPI
UnicodeValueToString (
  IN OUT CHAR16  *Buffer,
  IN UINTN       Flags,
  IN INT64       Value,
  IN UINTN       Width
  );

/**
  Produces a Null-terminated ASCII string in an output buffer based on a Null-terminated
  ASCII format string and a VA_LIST argument list.
  
  Produces a Null-terminated ASCII string in the output buffer specified by StartOfBuffer
  and BufferSize.
  The ASCII string is produced by parsing the format string specified by FormatString.
  Arguments are pulled from the variable argument list specified by Marker based on 
  the contents of the format string.
  The number of ASCII characters in the produced output buffer is returned not including
  the Null-terminator.
  If BufferSize is 0, then no output buffer is produced and 0 is returned.

  If BufferSize > 0 and StartOfBuffer is NULL, then ASSERT().
  If BufferSize > 0 and FormatString is NULL, then ASSERT().
  If PcdMaximumAsciiStringLength is not zero, and FormatString contains more than
  PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, then
  ASSERT().
  If PcdMaximumAsciiStringLength is not zero, and produced Null-terminated ASCII string
  contains more than PcdMaximumAsciiStringLength ASCII characters not including the
  Null-terminator, then ASSERT().

  @param  StartOfBuffer   A pointer to the output buffer for the produced Null-terminated 
                          ASCII string.
  @param  BufferSize      The size, in bytes, of the output buffer specified by StartOfBuffer.
  @param  FormatString    Null-terminated ASCII format string.
  @param  Marker          VA_LIST marker for the variable argument list.
  
  @return The number of ASCII characters in the produced output buffer not including the
          Null-terminator.

**/
UINTN
EFIAPI
AsciiVSPrint (
  OUT CHAR8         *StartOfBuffer,
  IN  UINTN         BufferSize,
  IN  CONST CHAR8   *FormatString,
  IN  VA_LIST       Marker
  );

/**
  Produces a Null-terminated ASCII string in an output buffer based on a Null-terminated
  ASCII format string and  variable argument list.
  
  Produces a Null-terminated ASCII string in the output buffer specified by StartOfBuffer
  and BufferSize.
  The ASCII string is produced by parsing the format string specified by FormatString.
  Arguments are pulled from the variable argument list based on the contents of the 
  format string.
  The number of ASCII characters in the produced output buffer is returned not including
  the Null-terminator.
  If BufferSize is 0, then no output buffer is produced and 0 is returned.

  If BufferSize > 0 and StartOfBuffer is NULL, then ASSERT().
  If BufferSize > 0 and FormatString is NULL, then ASSERT().
  If PcdMaximumAsciiStringLength is not zero, and FormatString contains more than
  PcdMaximumAsciiStringLength ASCII characters not including the Null-terminator, then
  ASSERT().
  If PcdMaximumAsciiStringLength is not zero, and produced Null-terminated ASCII string
  contains more than PcdMaximumAsciiStringLength ASCII characters not including the
  Null-terminator, then ASSERT().

  @param  StartOfBuffer   A pointer to the output buffer for the produced Null-terminated 
                          ASCII string.
  @param  BufferSize      The size, in bytes, of the output buffer specified by StartOfBuffer.
  @param  FormatString    Null-terminated ASCII format string.
  @param  ...             Variable argument list whose contents are accessed based on the 
                          format string specified by FormatString.
   
  @return The number of ASCII characters in the produced output buffer not including the
          Null-terminator.

**/
UINTN
EFIAPI
AsciiSPrint (
  OUT CHAR8        *StartOfBuffer,
  IN  UINTN        BufferSize,
  IN  CONST CHAR8  *FormatString,
  ...
  );

/**
  Produces a Null-terminated ASCII string in an output buffer based on a Null-terminated
  Unicode format string and a VA_LIST argument list.
  
  Produces a Null-terminated ASCII string in the output buffer specified by StartOfBuffer
  and BufferSize.
  The ASCII string is produced by parsing the format string specified by FormatString.
  Arguments are pulled from the variable argument list specified by Marker based on 
  the contents of the format string.
  The number of ASCII characters in the produced output buffer is returned not including
  the Null-terminator.
  If BufferSize is 0, then no output buffer is produced and 0 is returned.

  If BufferSize > 0 and StartOfBuffer is NULL, then ASSERT().
  If BufferSize > 0 and FormatString is NULL, then ASSERT().
  If BufferSize > 0 and FormatString is not aligned on a 16-bit boundary, then ASSERT().
  If PcdMaximumUnicodeStringLength is not zero, and FormatString contains more than
  PcdMaximumUnicodeStringLength Unicode characters not including the Null-terminator, then
  ASSERT().
  If PcdMaximumAsciiStringLength is not zero, and produced Null-terminated ASCII string
  contains more than PcdMaximumAsciiStringLength ASCII characters not including the
  Null-terminator, then ASSERT().

  @param  StartOfBuffer   A pointer to the output buffer for the produced Null-terminated 
                          ASCII string.
  @param  BufferSize      The size, in bytes, of the output buffer specified by StartOfBuffer.
  @param  FormatString    Null-terminated Unicode format string.
  @param  Marker          VA_LIST marker for the variable argument list.
  
  @return The number of ASCII characters in the produced output buffer not including the
          Null-terminator.

**/
UINTN
EFIAPI
AsciiVSPrintUnicodeFormat (
  OUT CHAR8         *StartOfBuffer,
  IN  UINTN         BufferSize,
  IN  CONST CHAR16  *FormatString,
  IN  VA_LIST       Marker
  );

/**
  Produces a Null-terminated ASCII string in an output buffer based on a Null-terminated
  Unicode format string and  variable argument list.
  
  Produces a Null-terminated ASCII string in the output buffer specified by StartOfBuffer
  and BufferSize.
  The ASCII string is produced by parsing the format string specified by FormatString.
  Arguments are pulled from the variable argument list based on the contents of the 
  format string.
  The number of ASCII characters in the produced output buffer is returned not including
  the Null-terminator.
  If BufferSize is 0, then no output buffer is produced and 0 is returned.

  If BufferSize > 0 and StartOfBuffer is NULL, then ASSERT().
  If BufferSize > 0 and FormatString is NULL, then ASSERT().
  If BufferSize > 0 and FormatString is not aligned on a 16-bit boundary, then ASSERT().
  If PcdMaximumUnicodeStringLength is not zero, and FormatString contains more than
  PcdMaximumUnicodeStringLength Unicode characters not including the Null-terminator, then
  ASSERT().
  If PcdMaximumAsciiStringLength is not zero, and produced Null-terminated ASCII string
  contains more than PcdMaximumAsciiStringLength ASCII characters not including the
  Null-terminator, then ASSERT().

  @param  StartOfBuffer   A pointer to the output buffer for the produced Null-terminated 
                          ASCII string.
  @param  BufferSize      The size, in bytes, of the output buffer specified by StartOfBuffer.
  @param  FormatString    Null-terminated Unicode format string.
  @param  ...             Variable argument list whose contents are accessed based on the 
                          format string specified by FormatString.
  
  @return The number of ASCII characters in the produced output buffer not including the
          Null-terminator.

**/
UINTN
EFIAPI
AsciiSPrintUnicodeFormat (
  OUT CHAR8         *StartOfBuffer,
  IN  UINTN         BufferSize,
  IN  CONST CHAR16  *FormatString,
  ...
  );

/**
  Converts a decimal value to a Null-terminated ASCII string.
  
  Converts the decimal number specified by Value to a Null-terminated ASCII string 
  specified by Buffer containing at most Width characters. No padding of spaces 
  is ever performed.
  If Width is 0 then a width of  MAXIMUM_VALUE_CHARACTERS is assumed.
  The number of ASCII characters in Buffer is returned not including the Null-terminator.
  If the conversion contains more than Width characters, then only the first Width
  characters are returned, and the total number of characters required to perform
  the conversion is returned.
  Additional conversion parameters are specified in Flags.  
  The Flags bit LEFT_JUSTIFY is always ignored.
  All conversions are left justified in Buffer.
  If Width is 0, PREFIX_ZERO is ignored in Flags.
  If COMMA_TYPE is set in Flags, then PREFIX_ZERO is ignored in Flags, and commas
  are inserted every 3rd digit starting from the right.
  If HEX_RADIX is set in Flags, then the output buffer will be 
  formatted in hexadecimal format.
  If Value is < 0 and HEX_RADIX is not set in Flags, then the fist character in Buffer is a '-'.
  If PREFIX_ZERO is set in Flags and PREFIX_ZERO is not being ignored, 
  then Buffer is padded with '0' characters so the combination of the optional '-' 
  sign character, '0' characters, digit characters for Value, and the Null-terminator
  add up to Width characters.
  
  If Buffer is NULL, then ASSERT().
  If unsupported bits are set in Flags, then ASSERT().
  If both COMMA_TYPE and HEX_RADIX are set in Flags, then ASSERT().
  If Width >= MAXIMUM_VALUE_CHARACTERS, then ASSERT()

  @param  Buffer  Pointer to the output buffer for the produced Null-terminated
                  ASCII string.
  @param  Flags   The bitmask of flags that specify left justification, zero pad, and commas.
  @param  Value   The 64-bit signed value to convert to a string.
  @param  Width   The maximum number of ASCII characters to place in Buffer, not including
                  the Null-terminator.
  
  @return The number of ASCII characters in Buffer not including the Null-terminator.

**/
UINTN
EFIAPI
AsciiValueToString (
  OUT CHAR8      *Buffer,
  IN  UINTN      Flags,
  IN  INT64      Value,
  IN  UINTN      Width
  );

#endif