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      1 // PercentPrinter.cpp
      2 
      3 #include "StdAfx.h"
      4 
      5 #include "../../../Common/Defs.h"
      6 #include "../../../Common/IntToString.h"
      7 
      8 #include "PercentPrinter.h"
      9 
     10 static const unsigned kPaddingSize = 2;
     11 static const unsigned kPercentsSize = 4;
     12 static const unsigned kMaxExtraSize = kPaddingSize + 32 + kPercentsSize;
     13 
     14 static void ClearPrev(char *p, unsigned num)
     15 {
     16   unsigned 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   unsigned size;
     55   {
     56     char c = '%';
     57     UInt64 value = 0;
     58     if (m_Total == (UInt64)(Int64)-1)
     59     {
     60       value = m_CurValue >> 20;
     61       c = 'M';
     62     }
     63     else if (m_Total != 0)
     64       value = m_CurValue * 100 / m_Total;
     65     ConvertUInt64ToString(value, s);
     66     size = (unsigned)strlen(s);
     67     s[size++] = c;
     68     s[size] = '\0';
     69   }
     70 
     71   unsigned extraSize = kPaddingSize + MyMax(size, kPercentsSize);
     72   if (extraSize < m_NumExtraChars)
     73     extraSize = m_NumExtraChars;
     74 
     75   char fullString[kMaxExtraSize * 3];
     76   char *p = fullString;
     77   unsigned i;
     78   if (m_NumExtraChars == 0)
     79   {
     80     for (i = 0; i < extraSize; i++)
     81       *p++ = ' ';
     82     m_NumExtraChars = extraSize;
     83   }
     84 
     85   for (i = 0; i < m_NumExtraChars; i++)
     86     *p++ = '\b';
     87   m_NumExtraChars = extraSize;
     88   for (; size < extraSize; size++)
     89     *p++ = ' ';
     90   MyStringCopy(p, s);
     91   (*OutStream) << fullString;
     92   OutStream->Flush();
     93   m_PrevValue = m_CurValue;
     94 }
     95 
     96 void CPercentPrinter::PrintRatio()
     97 {
     98   if (m_CurValue < m_PrevValue + m_MinStepSize &&
     99       m_CurValue + m_MinStepSize > m_PrevValue && m_NumExtraChars != 0)
    100     return;
    101   RePrintRatio();
    102 }
    103