PrintLib.h - Android社区 - https://www.androidos.net.cn/

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

Copyright (c) 2006 - 2015, Intel Corporation. All rights reserved.<BR>
This program and the accompanying materials are licensed and made available under
the terms and conditions of the BSD License that 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. The following end of line(EOL)
translations must be performed on the contents of the format string:

- '\\r' is translated to '\\r'
- '\\r\\n' is translated to '\\r\\n'
- '\\n' is translated to '\\r\\n'
- '\\n\\r' is translated to '\\r\\n'

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 size UINT64. Only valid for types X, x, and d.
If this flag is not specified, then the number being printed is size 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 precision 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 an unsigned hexadecimal number. The characters used are 0..9 and
A..F. If the flag 'L' is not specified, then the argument is assumed
to be size int. This does not follow ANSI C.
- X
- The argument is an unsigned hexadecimal number and the number is padded with
zeros. This is equivalent to a format string of "0x". If the flag
'L' is not specified, then the argument is assumed to be size int.
This does not follow ANSI C.
- d
- The argument is a signed decimal number. If the flag 'L' is not specified,
then the argument is assumed to be size int.
- u
- The argument is a unsigned decimal number. If the flag 'L' is not specified,
then the argument is assumed to be size int.
- p
- The argument is a pointer that is a (VOID *), and it is printed as an
unsigned 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 "mm/dd/yyyy hh:mm" 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 with a NULL terminator a decimal, hexadecimal, GUID,
/// or TIME value.
///
/// Maximum Length Decimal String = 28
/// "-9,223,372,036,854,775,808"
/// Maximum Length Hexadecimal 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 a BASE_LIST argument list.

@return The number of Unicode characters in the produced output buffer, not including the
Null-terminator.

**/
UINTN
EFIAPI
UnicodeBSPrint (
OUT CHAR16 *StartOfBuffer,
IN UINTN BufferSize,
IN CONST CHAR16 *FormatString,
IN BASE_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 A null-terminated Unicode format string.
@param ... The 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

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 A 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 a BASE_LIST argument list

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 A null-terminated ASCII format string.
@param Marker A BASE_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
UnicodeBSPrintAsciiFormat (
OUT CHAR16 *StartOfBuffer,
IN UINTN BufferSize,
IN CONST CHAR8 *FormatString,
IN BASE_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, 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 A 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 RADIX_HEX is set in Flags, then the output buffer will be
formatted in hexadecimal format.
If Value is < 0 and RADIX_HEX 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 RADIX_HEX 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 RADIX_HEX are set in Flags, then ASSERT().
If Width >= MAXIMUM_VALUE_CHARACTERS, then ASSERT()

@param Buffer The 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 A null-terminated ASCII format string.
@param Marker VA_LIST marker for the variable argument list.