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/** @file
Print Library worker functions.
Copyright (c) 2006, Intel Corporation<BR>
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.
Module Name: PrintLibInternal.c
**/
#include "PrintLibInternal.h"
static CONST CHAR8 mHexStr[] = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
/**
Internal function that places the character into the Buffer.
Internal function that places ASCII or Unicode character into the Buffer.
@param Buffer Buffer to place the Unicode or ASCII string.
@param Length Count of character to be placed into Buffer.
@param Character Character to be placed into Buffer.
@param Increment Character increment in Buffer.
@return Number of characters printed.
**/
CHAR8 *
BasePrintLibFillBuffer (
CHAR8 *Buffer,
INTN Length,
UINTN Character,
INTN Increment
)
{
INTN Index;
for (Index = 0; Index < Length; Index++) {
*Buffer = (CHAR8) Character;
*(Buffer + 1) = (CHAR8) (Character >> 8);
Buffer += Increment;
}
return Buffer;
}
/**
Internal function that convert a decimal number to a string in Buffer.
Print worker function that convert a decimal number to a string in Buffer.
@param Buffer Location to place the Unicode or ASCII string of Value.
@param Value Value to convert to a Decimal or Hexidecimal string in Buffer.
@param Radix Radix of the value
@return Number of characters printed.
**/
UINTN
EFIAPI
BasePrintLibValueToString (
IN OUT CHAR8 *Buffer,
IN INT64 Value,
IN UINTN Radix
)
{
UINTN Digits;
UINT32 Remainder;
//
// Loop to convert one digit at a time in reverse order
//
*(Buffer++) = 0;
Digits = 0;
do {
Value = (INT64)DivU64x32Remainder ((UINT64)Value, (UINT32)Radix, &Remainder);
*(Buffer++) = mHexStr[Remainder];
Digits++;
} while (Value != 0);
return Digits;
}
/**
Internal function that converts a decimal value to a Null-terminated string.
Converts the decimal number specified by Value to a Null-terminated
string specified by Buffer containing at most Width characters.
If Width is 0 then a width of MAXIMUM_VALUE_CHARACTERS is assumed.
The total number of characters placed in Buffer is returned.
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 Value is < 0, 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 Width >= MAXIMUM_VALUE_CHARACTERS, then ASSERT()
@param Buffer Pointer to the output buffer for the produced Null-terminated
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 characters to place in Buffer.
@param Increment Character increment in Buffer.
@return Total number of characters required to perform the conversion.
**/
UINTN
BasePrintLibConvertValueToString (
IN OUT CHAR8 *Buffer,
IN UINTN Flags,
IN INT64 Value,
IN UINTN Width,
IN UINTN Increment
)
{
CHAR8 *OriginalBuffer;
CHAR8 ValueBuffer[MAXIMUM_VALUE_CHARACTERS];
UINTN Count;
UINTN Digits;
UINTN Index;
ASSERT (Buffer != NULL);
ASSERT (Width < MAXIMUM_VALUE_CHARACTERS);
//
// Make sure Flags can only contain supported bits.
//
ASSERT ((Flags & ~(LEFT_JUSTIFY | COMMA_TYPE | PREFIX_ZERO)) == 0);
OriginalBuffer = Buffer;
if (Width == 0 || (Flags & COMMA_TYPE) != 0) {
Flags &= (~PREFIX_ZERO);
}
if (Width == 0) {
Width = MAXIMUM_VALUE_CHARACTERS - 1;
}
if (Value < 0) {
Value = -Value;
Buffer = BasePrintLibFillBuffer (Buffer, 1, '-', Increment);
}
Count = BasePrintLibValueToString (ValueBuffer, Value, 10);
if ((Flags & PREFIX_ZERO) != 0) {
Buffer = BasePrintLibFillBuffer (Buffer, Width - Count, '0', Increment);
}
Digits = 3 - (Count % 3);
for (Index = 0; Index < Count; Index++) {
Buffer = BasePrintLibFillBuffer (Buffer, 1, ValueBuffer[Count - Index], Increment);
if ((Flags & COMMA_TYPE) != 0) {
Digits++;
if (Digits == 3) {
Digits = 0;
if ((Index + 1) < Count) {
Buffer = BasePrintLibFillBuffer (Buffer, 1, ',', Increment);
}
}
}
}
Buffer = BasePrintLibFillBuffer (Buffer, 1, 0, Increment);
return ((Buffer - OriginalBuffer) / Increment);
}
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