Tools/Source/TianoTools/String/PrintLibInternal.c

   1 /** @file
   2   Print Library worker functions.
   3
   4
   5 Copyright (c)  2004-2006 Intel Corporation. All rights reserved
   6 This software and associated documentation (if any) is furnished
   7 under a license and may only be used or copied in accordance
   8 with the terms of the license. Except as permitted by such
   9 license, no part of this software or documentation may be
  10 reproduced, stored in a retrieval system, or transmitted in any
  11 form or by any means without the express written consent of
  12 Intel Corporation.
  13
  14   THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
  15   WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
  16
  17   Module Name:  PrintLibInternal.c
  18
  19 **/
  20
  21 #include <Common/UefiBaseTypes.h>
  22 #include <Library/PrintLib.h>
  23
  24 #include "CommonLib.h"
  25 #include "PrintLibInternal.h"
  26
  27 static CONST CHAR8 mHexStr[] = {'0','1','2','3','4','5','6','7','8','9','A','B','C','D','E','F'};
  28
  29 CHAR8 *
  30 BasePrintLibFillBuffer (
  31   CHAR8   *Buffer,
  32   INTN    Length,
  33   UINTN   Character,
  34   INTN    Increment
  35   )
  36 {
  37   INTN  Index;
  38
  39   for (Index = 0; Index < Length; Index++) {
  40     *Buffer       =  (CHAR8) Character;
  41     *(Buffer + 1) =  (CHAR8) (Character >> 8);
  42     Buffer        += Increment;
  43   }
  44   return Buffer;
  45 }
  46
  47 /**
  48   Print worker function that prints a Value as a decimal number in Buffer.
  49
  50   @param  Buffer Location to place the Unicode or ASCII string of Value.
  51
  52   @param  Value Value to convert to a Decimal or Hexidecimal string in Buffer.
  53
  54   @param  Flags Flags to use in printing string, see file header for details.
  55
  56   @param  Precision Minimum number of digits to return in the ASCII string
  57
  58   @return Number of characters printed.
  59
  60 **/
  61 UINTN
  62 EFIAPI
  63 BasePrintLibValueToString (
  64   IN OUT CHAR8  *Buffer,
  65   IN INT64      Value,
  66   IN UINTN      Radix
  67   )
  68 {
  69   UINTN   Digits;
  70   UINT32  Remainder;
  71
  72   //
  73   // Loop to convert one digit at a time in reverse order
  74   //
  75   *(Buffer++) = 0;
  76   Digits = 0;
  77   do {
  78     // Value = (INT64)DivU64x32Remainder ((UINT64)Value, (UINT32)Radix, &Remainder);
  79     Remainder = (UINT64)Value % (UINT32)Radix;
  80     Value = (UINT64)Value / (UINT32)Radix;
  81     *(Buffer++) = mHexStr[Remainder];
  82     Digits++;
  83   } while (Value != 0);
  84   return Digits;
  85 }
  86
  87 UINTN
  88 BasePrintLibConvertValueToString (
  89   IN OUT CHAR8   *Buffer,
  90   IN UINTN       Flags,
  91   IN INT64       Value,
  92   IN UINTN       Width,
  93   IN UINTN       Increment
  94   )
  95 {
  96   CHAR8  *OriginalBuffer;
  97   CHAR8  ValueBuffer[MAXIMUM_VALUE_CHARACTERS];
  98   UINTN  Count;
  99   UINTN  Digits;
 100   UINTN  Index;
 101
 102   OriginalBuffer = Buffer;
 103
 104   if (Width == 0 || (Flags & COMMA_TYPE) != 0) {
 105     Flags &= (~PREFIX_ZERO);
 106   }
 107
 108   if (Width == 0 || Width > (MAXIMUM_VALUE_CHARACTERS - 1)) {
 109     Width = MAXIMUM_VALUE_CHARACTERS - 1;
 110   }
 111
 112   if (Value < 0) {
 113     Value = -Value;
 114     Buffer = BasePrintLibFillBuffer (Buffer, 1, '-', Increment);
 115   }
 116
 117   Count = BasePrintLibValueToString (ValueBuffer, Value, 10);
 118
 119   if ((Flags & PREFIX_ZERO) != 0) {
 120     Buffer = BasePrintLibFillBuffer (Buffer, Width - Count, '0', Increment);
 121   }
 122
 123   Digits = 3 - (Count % 3);
 124   for (Index = 0; Index < Count; Index++) {
 125     Buffer = BasePrintLibFillBuffer (Buffer, 1, ValueBuffer[Count - Index], Increment);
 126     if ((Flags & COMMA_TYPE) != 0) {
 127       Digits++;
 128       if (Digits == 3) {
 129         Digits = 0;
 130         if ((Index + 1) < Count) {
 131           Buffer = BasePrintLibFillBuffer (Buffer, 1, ',', Increment);
 132         }
 133       }
 134     }
 135   }
 136
 137   Buffer = BasePrintLibFillBuffer (Buffer, 1, 0, Increment);
 138
 139   return ((Buffer - OriginalBuffer) / Increment);
 140 }