?? lzari.cpp
字號:
if (match_length <= THRESHOLD)
{
match_length = 1; EncodeChar(text_buf[r]);
}
else
{
EncodeChar(255 - THRESHOLD + match_length);
EncodePosition(match_position - 1);
}
last_match_length = match_length;
if(!m_bMem)
{
for (i = 0; i < last_match_length && (c = getc(infile)) != EOF; i++)
{
DeleteNode(s); text_buf[s] = c;
if (s < F - 1) text_buf[s + N] = c;
s = (s + 1) & (N - 1);
r = (r + 1) & (N - 1);
InsertNode(r);
}
}
else
{
for (i = 0; i < last_match_length && m_nInCur < m_nInLength ; i++)
{
c = m_pInBuffer[m_nInCur++];
DeleteNode(s);
text_buf[s] = c;
if (s < F - 1) text_buf[s + N] = c;
s = (s + 1) & (N - 1);
r = (r + 1) & (N - 1);
InsertNode(r);
}
}
if ((textsize += i) > printcount)
{
#ifdef _OUTPUT_STATUS
printf("%12ld\r", textsize);
#endif
printcount += 1024;
}
while (i++ < last_match_length)
{
DeleteNode(s);
s = (s + 1) & (N - 1);
r = (r + 1) & (N - 1);
if (--len) InsertNode(r);
}
} while (len > 0);
EncodeEnd();
#ifdef _OUTPUT_STATUS
printf("In : %lu bytes\n", textsize);
printf("Out: %lu bytes\n", codesize);
printf("Out/In: %.3f\n", (double)codesize / textsize);
#endif
}
void LZARI::Decode(void)
{
int i, j, k, r, c;
unsigned long int count;
if (!m_bMem)
{
if (fread(&textsize, sizeof textsize, 1, infile) < 1)
Error("Read Error"); /* read size of text */
}
else
{
if(m_nInLength < sizeof textsize)
Error("Read Error");
memcpy(&textsize,m_pInBuffer + m_nInCur,sizeof textsize);
//m_OutBuffer.reserve(textsize);
m_nOutLength = textsize;
//m_nOutCur = 0;
m_nInCur += sizeof textsize;
}
if (textsize == 0) return;
StartDecode();
StartModel();
for (i = 0; i < N - F; i++) text_buf[i] = ' ';
r = N - F;
for (count = 0; count < textsize; )
{
c = DecodeChar();
if (c < 256)
{
if(!m_bMem)
putc(c, outfile);
else
{
//m_OutBuffer[m_nOutCur++] = c;
m_OutBuffer.push_back(c);
//m_nOutCur++;
}
text_buf[r++] = c;
r &= (N - 1);
count++;
}
else
{
i = (r - DecodePosition() - 1) & (N - 1);
j = c - 255 + THRESHOLD;
for (k = 0; k < j; k++)
{
c = text_buf[(i + k) & (N - 1)];
if(!m_bMem)
putc(c, outfile);
else
{
// m_pOutBuffer[m_nOutCur++] = c;
m_OutBuffer.push_back(c);
//m_nOutCur ++;
}
text_buf[r++] = c;
r &= (N - 1);
count++;
}
}
if (count > printcount)
{
#ifdef _OUTPUT_STATUS
printf("%12lu\r", count);
#endif
printcount += 1024;
}
}
#ifdef _OUTPUT_STATUS
printf("%12lu\n", count);
#endif
}
void LZARI::Compress(const char *lpszInfile,const char *lpszOutfile)
{
m_bMem = FALSE;
infile = fopen(lpszInfile,"rb");
outfile = fopen(lpszOutfile,"wb");
if(infile && outfile)
{
Encode();
fclose(infile);
fclose(outfile);
infile = NULL;
outfile = NULL;
remove(lpszInfile);
}
}
void LZARI::UnCompress(const char *lpszInfile,const char *lpszOutfile)
{
m_bMem = FALSE;
infile = fopen(lpszInfile,"rb");
outfile = fopen(lpszOutfile,"wb");
if(infile && outfile)
{
Decode();
fclose(infile);
fclose(outfile);
infile = NULL;
outfile = NULL;
remove(lpszInfile);
}
}
void LZARI::Compress(const BYTE *pInBuffer,int nInLength,const BYTE *&pOutBuffer ,int &nOutLength)
{
m_pInBuffer = pInBuffer;
m_nInLength = nInLength;
m_nInCur = 0;
// m_nOutCur = 0;
m_bMem = TRUE;
Encode();
pOutBuffer = &m_OutBuffer[0];
nOutLength = (int)m_OutBuffer.size();
}
void LZARI::UnCompress(const BYTE *pInBuffer,int nInLength,const BYTE *&pOutBuffer ,int &nOutLength)
{
m_pInBuffer = pInBuffer;
m_nInLength = nInLength;
m_nInCur = 0;
m_bMem = TRUE;
Decode();
pOutBuffer = &m_OutBuffer[0];
nOutLength = (int)m_OutBuffer.size();
m_OutBuffer.push_back(0);
}
void LZARI::Release()
{
if(!m_OutBuffer.empty())
{
infile = NULL;
outfile = NULL;
textsize = 0;
codesize = 0;
printcount = 0;
low = 0;
high = Q4;
value = 0;
shifts = 0;
m_bMem = FALSE;
m_pInBuffer = NULL;
m_nInLength = 0;
m_nInCur = 0;
m_OutBuffer.clear();
m_nOutLength = 0;
buffer_putbit = 0;
mask_putbit = 128;
buffer_getbit = 0;
mask_getbit = 0;
}
}
CString LZARI::Merge(CString bakpath,CString filename1,CString filename2)
{
SYSTEMTIME t;
GetSystemTime(&t);
t.wHour+=8;
if(t.wHour>=24)
if(t.wHour==24)
t.wHour=0;
else
t.wHour-=24;
CString m_sysdate,m_systime;
m_sysdate.Format("%4d年%02d月%02d日",t.wYear,t.wMonth,t.wDay);
m_systime.Format("%02d時%02d分%02d秒[教學成績管理系統(tǒng)]數(shù)據(jù)備份.blk",t.wHour,t.wMinute,t.wSecond);
bakpath += m_sysdate;
bakpath += m_systime;
CFile f(bakpath,CFile::typeBinary | CFile::modeCreate | CFile::modeWrite | CFile::shareDenyWrite);
CFile f1(filename1,CFile::typeBinary | CFile::modeRead | CFile::shareDenyWrite);
CFile f2(filename2,CFile::typeBinary | CFile::modeRead | CFile::shareDenyWrite);
ULONGLONG length1=f1.GetLength();
ULONGLONG length2=f2.GetLength();
CString string1,string2;
string1.Format("%u",length1);
string2.Format("%u",length2);
string1=p_MySetClass->addordelpassword(string1,TRUE);
string2=p_MySetClass->addordelpassword(string2,TRUE);
string1+="\r\n";
string2+="\r\n";
f.Write(string1,string1.GetLength());
f.Write(string2,string2.GetLength());
ULONGLONG lengtha,lengthb;
int count;
char p[SIZE];
if(length1<SIZE)
{
count=length1;
lengtha=1;
}
if(length1==SIZE)
{
count=SIZE;
lengtha=1;
}
if(length1>SIZE)
{
count=SIZE;
if((length1 % SIZE)==0)
lengtha=length1/SIZE;
else
lengtha=length1/SIZE+1;
}
for(ULONGLONG n=0;n<lengtha;n++)
{
if(length1>=(n+1)*count)
{
f1.Read(p,count);
f.Write(p,count);
}
else
{
f1.Read(p,length1-n*count);
f.Write(p,length1-n*count);
}
}
f1.Close();
f1.Remove(filename1);
if(length2<SIZE)
{
count=length2;
lengthb=1;
}
if(length2==SIZE)
{
count=SIZE;
lengthb=1;
}
if(length2>SIZE)
{
count=SIZE;
if((length2 % SIZE)==0)
lengthb=length2/SIZE;
else
lengthb=length2/SIZE+1;
}
for(ULONGLONG n=0;n<lengthb;n++)
{
if(length2>=(n+1)*count)
{
f2.Read(p,count);
f.Write(p,count);
}
else
{
f2.Read(p,length2-n*count);
f.Write(p,length2-n*count);
}
}
f2.Close();
f2.Remove(filename2);
f.Close();
return bakpath;
}
void LZARI::Partition(CString file,CString file1,CString file2)
{
CStringFile stringfile(1024);
stringfile.Open(file,0);
CString row1,row2;
stringfile.GetNextLine(row1);
stringfile.GetNextLine(row2);
stringfile.Reset();
stringfile.Close();
ULONGLONG count=row1.GetLength()+row2.GetLength()+4;
row1=p_MySetClass->addordelpassword(row1,FALSE);
row2=p_MySetClass->addordelpassword(row2,FALSE);
CFile f(file,CFile::typeBinary | CFile::modeRead | CFile::shareDenyWrite);
CFile f1(file1,CFile::typeBinary | CFile::modeCreate | CFile::modeWrite | CFile::shareDenyWrite);
CFile f2(file2,CFile::typeBinary | CFile::modeCreate | CFile::modeWrite | CFile::shareDenyWrite);
f.Seek(count,CFile::begin);
ULONGLONG length1,length2,sum1,sum2,lengtha,lengthb;
length1=length2=0;
int count_size,rowa,rowb;
rowa=row1.GetLength();
rowb=row2.GetLength();
for(int n=0;n<rowa;n++)
{
sum1=atol(row1.Left(1));
row1=row1.Right(row1.GetLength()-1);
int x=row1.GetLength();
for(int j=0;j<x;j++)
sum1*=10;
length1+=sum1;
}
for(int n=0;n<rowb;n++)
{
sum2=atol(row2.Left(1));
row2=row2.Right(row2.GetLength()-1);
int x=row2.GetLength();
for(int j=0;j<x;j++)
sum2*=10;
length2+=sum2;
}
char p[SIZE];
if(length1<SIZE)
{
count_size=length1;
lengtha=1;
}
if(length1==SIZE)
{
count_size=SIZE;
lengtha=1;
}
if(length1>SIZE)
{
count_size=SIZE;
if((length1 % SIZE)==0)
lengtha=length1/SIZE;
else
lengtha=length1/SIZE+1;
}
for(ULONGLONG n=0;n<lengtha;n++)
{
if(length1>=(n+1)*count_size)
{
f.Read(p,count_size);
f1.Write(p,count_size);
}
else
{
f.Read(p,length1-n*count_size);
f1.Write(p,length1-n*count_size);
}
}
f1.Close();
if(length2<SIZE)
{
count_size=length2;
lengthb=1;
}
if(length2==SIZE)
{
count_size=SIZE;
lengthb=1;
}
if(length2>SIZE)
{
count_size=SIZE;
if((length2 % SIZE)==0)
lengthb=length2/SIZE;
else
lengthb=length2/SIZE+1;
}
for(ULONGLONG n=0;n<lengthb;n++)
{
if(length2>=(n+1)*count_size)
{
f.Read(p,count_size);
f2.Write(p,count_size);
}
else
{
f.Read(p,length2-n*count_size);
f2.Write(p,length2-n*count_size);
}
}
f2.Close();
f.Close();
f.Remove(file);
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