1 // PercentPrinter.cpp

     2 

     3 #include "StdAfx.h"

     4 

     5 #include "Common/IntToString.h"

     6 #include "Common/MyString.h"

     7 

     8 #include "PercentPrinter.h"

     9 

    10 const int kPaddingSize = 2;

    11 const int kPercentsSize = 4;

    12 const int kMaxExtraSize = kPaddingSize + 32 + kPercentsSize;

    13 

    14 static void ClearPrev(char *p, int num)

    15 {

    16   int i;

    17   for (i = 0; i < num; i++) *p++ = '\b';

    18   for (i = 0; i < num; i++) *p++ = ' ';

    19   for (i = 0; i < num; i++) *p++ = '\b';

    20   *p = '\0';

    21 }

    22 

    23 void CPercentPrinter::ClosePrint()

    24 {

    25   if (m_NumExtraChars == 0)

    26     return;

    27   char s[kMaxExtraSize * 3 + 1];

    28   ClearPrev(s, m_NumExtraChars);

    29   (*OutStream) << s;

    30   m_NumExtraChars = 0;

    31 }

    32 

    33 void CPercentPrinter::PrintString(const char *s)

    34 {

    35   ClosePrint();

    36   (*OutStream) << s;

    37 }

    38 

    39 void CPercentPrinter::PrintString(const wchar_t *s)

    40 {

    41   ClosePrint();

    42   (*OutStream) << s;

    43 }

    44 

    45 void CPercentPrinter::PrintNewLine()

    46 {

    47   ClosePrint();

    48   (*OutStream) << "\n";

    49 }

    50 

    51 void CPercentPrinter::RePrintRatio()

    52 {

    53   char s[32];

    54   ConvertUInt64ToString(((m_Total == 0) ? 0 : (m_CurValue * 100 / m_Total)), s);

    55   int size = (int)strlen(s);

    56   s[size++] = '%';

    57   s[size] = '\0';

    58 

    59   int extraSize = kPaddingSize + MyMax(size, kPercentsSize);

    60   if (extraSize < m_NumExtraChars)

    61     extraSize = m_NumExtraChars;

    62 

    63   char fullString[kMaxExtraSize * 3];

    64   char *p = fullString;

    65   int i;

    66   if (m_NumExtraChars == 0)

    67   {

    68     for (i = 0; i < extraSize; i++) 

    69       *p++ = ' ';

    70     m_NumExtraChars = extraSize;

    71   }

    72 

    73   for (i = 0; i < m_NumExtraChars; i++) 

    74     *p++ = '\b';

    75   m_NumExtraChars = extraSize;

    76   for (; size < m_NumExtraChars; size++)

    77     *p++ = ' ';

    78   MyStringCopy(p, s);

    79   (*OutStream) << fullString;

    80   OutStream->Flush(); 

    81   m_PrevValue = m_CurValue;

    82 }

    83 

    84 void CPercentPrinter::PrintRatio()

    85 {

    86   if (m_CurValue < m_PrevValue + m_MinStepSize && 

    87       m_CurValue + m_MinStepSize > m_PrevValue && m_NumExtraChars != 0)

    88     return;

    89   RePrintRatio();

    90 }