http://blog.jinesc.net/upload/用VB制作gzip代码_l8.rar
[HR][/HR]
Option Explicit
Private Declare Sub CopyMemory Lib "kernel32" Alias "RtlMoveMemory" (hpvDest As Any, hpvSource As Any, ByVal cbCopy As Long)
Private Declare Function InitDecompression Lib "gzip.dll" () As Long
Private Declare Function CreateDecompression Lib "gzip.dll" (ByRef context As Long, ByVal Flags As Long) As Long
Private Declare Function DestroyDecompression Lib "gzip.dll" (ByRef context As Long) As Long
Private Declare Function Decompress Lib "gzip.dll" (ByVal context As Long, inBytes As Any, ByVal input_size As Long, outBytes As Any, ByVal output_size As Long, ByRef input_used As Long, ByRef output_used As Long) As Long
Private Const OFFSET As Long = &H8
'解压缩数组
Public Function UnCompressByte(ByteArray() As Byte) As Boolean
Dim BufferSize As Long
Dim buffer() As Byte
Dim lReturn As Long
Dim outUsed As Long
Dim inUsed As Long
'创建解压缩后的缓存
CopyMemory BufferSize, ByteArray(0), OFFSET
BufferSize = BufferSize + (BufferSize * 0.01) + 12
ReDim buffer(BufferSize) As Byte
'创建解压缩进程
Dim contextHandle As Long: InitDecompression
CreateDecompression contextHandle, 1 '创建
'解压缩数据
lReturn = Decompress(ByVal contextHandle, ByteArray(0), UBound(ByteArray) + 1, buffer(0), BufferSize, inUsed, outUsed)
DestroyDecompression contextHandle
'删除重复的数据
ReDim Preserve ByteArray(0 To outUsed - 1)
CopyMemory ByteArray(0), buffer(0), outUsed
End Function
#include
#includeint main()
{
HINSTANCE hGetProcIDDLL = LoadLibrary("C://WINNT//system32//gzip.dll");
printf("dll loaded");
/* get pointer to the function in the dll*/
FARPROC lpfnGetProcessID = GetProcAddress(HMODULE (hGetProcIDDLL),"Decompress");
FARPROC lpfnGetProcessID1 = GetProcAddress(HMODULE (hGetProcIDDLL),"InitDecompression");
FARPROC lpfnGetProcessID2 = GetProcAddress(HMODULE (hGetProcIDDLL),"CreateDecompression");
FARPROC lpfnGetProcessID3 = GetProcAddress(HMODULE (hGetProcIDDLL),"InitCompression");
FARPROC lpfnGetProcessID4 = GetProcAddress(HMODULE (hGetProcIDDLL),"CopyMemory");
// Call CopyMemory(arrDestination(destbeginPos), arrSource(srcbeginPos), length)
// printf("Hello World long decompress!/n");
//printf(1);
typedef long (__stdcall * pICFUNC)(long, BYTE[],long,BYTE[],long,long,long);
typedef long (__stdcall * pICFUNC1)();
typedef long (__stdcall * pICFUNC2)(long,int);
typedef long (__stdcall * pICFUNC3)();
typedef long (__stdcall * pICFUNC4)(BYTE[],BYTE[],long);
typedef UINT (CALLBACK* CopyMemory)(BYTE[],BYTE[],long);
CopyMemory ptrCopyMemory;
ptrCopyMemory = (CopyMemory)GetProcAddress(hGetProcIDDLL,"CopyMemory");
typedef UINT (CALLBACK* InitDecompression)(); InitDecompression ptrInitDecompression;
ptrInitDecompression = (InitDecompression)GetProcAddress(hGetProcIDDLL,"InitDecompression");
//ReturnVal = ptrLockWorkStation();
ptrInitDecompression();
printf("Hello World long decompress!/n");
pICFUNC MyFunction;
MyFunction = pICFUNC(lpfnGetProcessID);
pICFUNC1 MyFunction1;
MyFunction1 = pICFUNC1(lpfnGetProcessID1);
pICFUNC2 MyFunction2;
MyFunction2 = pICFUNC2(lpfnGetProcessID2);
pICFUNC3 MyFunction3;
MyFunction3 = pICFUNC3(lpfnGetProcessID3);
pICFUNC4 MyFunction4;
MyFunction4 = pICFUNC4(lpfnGetProcessID4);
//BYTE[] a=NewByteArray(jb);
unsigned long handle=0;long max=1024;long inu=0;long outu=0;int GZIP_LVL=1;
BYTE *AB={(unsigned char *)"1234567890123456789012345678901234567890123456789012345678901234567890123456789012345678901234567890"};
// int li= strlen( (char*)AB);
int orglen=100;
//printf("%l", li);
BYTE *oB=new BYTE[43822];
CopyMemory(AB,oB,234);
printf("function defined and parameters ready"+orglen,"%l",orglen);
printf("function defined and parameters ready");
/* The actual call to the function contained in the dll */
handle=MyFunction1();
//handle=MyFunction4(AB,oB,inu);
handle=MyFunction3();
printf("InitDecompression & InitCompression");
MyFunction2(handle,GZIP_LVL);//Call CreateDecompression(handle, GZIP_LVL);
//handle=MyFunction2(handle,GZIP_LVL);
printf("CreateDecompression");
long intMyReturnVal =0;
do
{// int
intMyReturnVal=MyFunction(handle, AB, orglen, oB, max, inu, outu);
orglen = orglen - inu;
}
while(intMyReturnVal=0);
/* Release the Dll */
FreeLibrary(hGetProcIDDLL);
printf("Hello World long decompress!/n");
/* The return val from the dll */
return intMyReturnVal;
}
[HR][/HR]
Public Function UnCompress(ByVal srcGzip As String, ByVal distFile As String) As Boolean
Dim success As Boolean = True
Dim read, out As FileStream, gzStream As GZipStream
Try
read = New FileStream(srcGzip, FileMode.Open)
gzStream = New GZipStream(read, CompressionMode.Decompress)
If (File.Exists(distFile)) Then
File.Delete(distFile)
End If
out = New FileStream(distFile, FileMode.Create)
Dim len As Int32 = 1024 * 1024
Dim buffer(len) As Byte
Dim count As Int32 = 0
While (True)
count = gzStream.Read(buffer, 0, len)
If (count = 0) Then
Exit While
End If
out.Write(buffer, 0, count)
End While
Catch ex As Exception
MsgBox(ex.Message)
success = False
Finally
If Not (read Is Nothing) Then
read.Close()
End If
If Not (out Is Nothing) Then
out.Close()
End If
End Try
Return success
End Function
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