diff options
Diffstat (limited to 'MdePkg/Library/BasePrintLib/PrintLibInternal.c')
| -rw-r--r-- | MdePkg/Library/BasePrintLib/PrintLibInternal.c | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/MdePkg/Library/BasePrintLib/PrintLibInternal.c b/MdePkg/Library/BasePrintLib/PrintLibInternal.c new file mode 100644 index 0000000000..72c05e4dc5 --- /dev/null +++ b/MdePkg/Library/BasePrintLib/PrintLibInternal.c @@ -0,0 +1,214 @@ +/** @file
+ Print Library worker functions.
+
+ Copyright (c) 2006 - 2007, 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 common header file for this module.
+//
+#include "CommonHeader.h"
+
+#include "PrintLibInternal.h"
+
+GLOBAL_REMOVE_IF_UNREFERENCED 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 EndBuffer The end of the input Buffer. No characters will be
+ placed after that.
+ @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,
+ CHAR8 *EndBuffer,
+ INTN Length,
+ UINTN Character,
+ INTN Increment
+ )
+{
+ INTN Index;
+
+ for (Index = 0; Index < Length && Buffer < EndBuffer; 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 number of 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 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, not including
+ the Null-terminator.
+ @param Increment Character increment in Buffer.
+
+ @return The number of characters in Buffer not including the Null-terminator.
+
+**/
+UINTN
+BasePrintLibConvertValueToString (
+ IN OUT CHAR8 *Buffer,
+ IN UINTN Flags,
+ IN INT64 Value,
+ IN UINTN Width,
+ IN UINTN Increment
+ )
+{
+ CHAR8 *OriginalBuffer;
+ CHAR8 *EndBuffer;
+ CHAR8 ValueBuffer[MAXIMUM_VALUE_CHARACTERS];
+ UINTN Count;
+ UINTN Digits;
+ UINTN Index;
+ UINTN Radix;
+
+ ASSERT (Buffer != NULL);
+ ASSERT (Width < MAXIMUM_VALUE_CHARACTERS);
+ //
+ // Make sure Flags can only contain supported bits.
+ //
+ ASSERT ((Flags & ~(LEFT_JUSTIFY | COMMA_TYPE | PREFIX_ZERO | RADIX_HEX)) == 0);
+
+ //
+ // If both COMMA_TYPE and HEX_RADIX are set, then ASSERT ()
+ //
+ ASSERT (((Flags & COMMA_TYPE) != 0 && (Flags & RADIX_HEX) != 0) == FALSE);
+
+ OriginalBuffer = Buffer;
+
+ if (Width == 0 || (Flags & COMMA_TYPE) != 0) {
+ Flags &= (~PREFIX_ZERO);
+ }
+
+ if (Width == 0) {
+ Width = MAXIMUM_VALUE_CHARACTERS - 1;
+ }
+ //
+ // Set the tag for the end of the input Buffer.
+ //
+ EndBuffer = Buffer + Width * Increment;
+
+ if ((Value < 0) && ((Flags & RADIX_HEX) == 0)) {
+ Value = -Value;
+ Buffer = BasePrintLibFillBuffer (Buffer, EndBuffer, 1, '-', Increment);
+ Width--;
+ }
+
+ Radix = ((Flags & RADIX_HEX) == 0)? 10 : 16;
+ Count = BasePrintLibValueToString (ValueBuffer, Value, Radix);
+
+ if ((Flags & PREFIX_ZERO) != 0) {
+ Buffer = BasePrintLibFillBuffer (Buffer, EndBuffer, Width - Count, '0', Increment);
+ }
+
+ Digits = Count % 3;
+ if (Digits != 0) {
+ Digits = 3 - Digits;
+ }
+ for (Index = 0; Index < Count; Index++) {
+ Buffer = BasePrintLibFillBuffer (Buffer, EndBuffer, 1, ValueBuffer[Count - Index], Increment);
+ if ((Flags & COMMA_TYPE) != 0) {
+ Digits++;
+ if (Digits == 3) {
+ Digits = 0;
+ if ((Index + 1) < Count) {
+ Buffer = BasePrintLibFillBuffer (Buffer, EndBuffer, 1, ',', Increment);
+ }
+ }
+ }
+ }
+
+ BasePrintLibFillBuffer (Buffer, EndBuffer + Increment, 1, 0, Increment);
+
+ return ((Buffer - OriginalBuffer) / Increment);
+}
+
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