internal class Decompressor
{
public unsafe static byte[] decompress(byte[] src, int maxSize)
{
int dLen = maxSize;
byte[] data;
byte[] dstExt = new byte[dLen + 0x800];
fixed (byte* s = src, d = dstExt)
{
if (DecompressData(s, src.Length, d, &dLen) == 0)
throw new System.Exception();
data = new byte[dLen];
for (int i = 0; i < dLen; i++)
data[i] = d[i];
}
return data;
}
unsafe static int DecompressData(byte* pSrc, int szSrc, byte* pDst, int* pszDst)
{
if ((pSrc == null) || (szSrc < 3) || (pDst == null) || (pszDst == null) || (*pszDst < 1))
return 0;
byte* pTo = pDst;
byte* pEndSrc = &pSrc[szSrc];
byte* pEndDst = &pDst[*pszDst];
*pszDst = 0;
if ((pEndSrc[-1] != 0) || (pEndSrc[-2] != 0) || (pEndSrc[-3] != 0x11))
return 0;
uint ch = *pSrc;
if (ch > 0x11)
{
ch -= 0x11;
pSrc++;
if (ch < 4)
goto LABEL_37;
if ((pEndDst - pDst < ch) || (pEndSrc - pSrc < ch + 1))
return 0;
while (ch-- > 0)
*pDst++ = *pSrc++;
goto LABEL_31;
}
LABEL_15:
ch = *pSrc++;
if (ch >= 0x10)
goto LABEL_41;
if (ch == 0)
{
if (pSrc > pEndSrc)
return 0;
while (*pSrc == 0)
{
ch += 0xFF;
if (++pSrc > pEndSrc)
return 0;
}
ch += (uint)*pSrc++ + 0xF;
}
if ((pEndDst - pDst < ch + 3) || (pEndSrc - pSrc < ch + 4))
return 0;
*(uint*)pDst = *(uint*)pSrc;
pDst += 4;
pSrc += 4;
if (--ch != 0)
{
while (ch >= 4)
{
*(uint*)pDst = *(uint*)pSrc;
pDst += 4;
pSrc += 4;
ch -= 4;
}
}
while (ch-- > 0)
*pDst++ = *pSrc++;
LABEL_31:
ch = *pSrc++;
if (ch >= 0x10)
goto LABEL_41;
byte* p = pDst - (*pSrc++ * 4) - (ch / 4) - 0x801;
if ((p < pTo) || (pEndDst - pDst < 3))
return 0;
*pDst++ = *p++;
*pDst++ = *p++;
*pDst++ = *p++;
LABEL_36:
ch = (uint)pSrc[-2] & 3;
if (ch == 0)
goto LABEL_15;
LABEL_37:
if ((pEndDst - pDst < ch) || (pEndSrc - pSrc < ch + 1))
return 0;
while (ch-- > 0)
*pDst++ = *pSrc++;
ch = *pSrc++;
LABEL_41:
if (ch >= 0x40)
{
p = pDst - (*pSrc++ * 8) - ((ch / 4) & 7) - 1;
ch = ch / 32 - 1;
if ((p < pTo) || (pEndDst - pDst < ch + 2))
return 0;
*pDst++ = *p++;
*pDst++ = *p++;
while (ch-- > 0)
*pDst++ = *p++;
goto LABEL_36;
}
if (ch >= 0x20)
{
ch &= 0x1F;
if (ch == 0)
{
if (pSrc > pEndSrc)
return 0;
while (*pSrc == 0)
{
ch += 0xFF;
if (++pSrc > pEndSrc)
return 0;
}
ch += (uint)*pSrc++ + 0x1F;
}
p = pDst - (*(ushort*)pSrc / 4) - 1;
pSrc += 2;
if ((p < pTo) || (pEndDst - pDst < ch + 2))
return 0;
if ((ch >= 6) && (pDst - p >= 4))
{
*(uint*)pDst = *(uint*)p;
pDst += 4;
p += 4;
ch -= 2;
while (ch >= 4)
{
*(uint*)pDst = *(uint*)p;
pDst += 4;
p += 4;
ch -= 4;
}
}
else
{
*pDst++ = *p++;
*pDst++ = *p++;
}
while (ch-- > 0)
*pDst++ = *p++;
goto LABEL_36;
}
if (ch >= 0x10)
{
p = pDst - ((ch & 8) << 11);
ch &= 7;
if (ch == 0)
{
if (pSrc > pEndSrc)
return 0;
while (*pSrc == 0)
{
ch += 0xFF;
if (++pSrc > pEndSrc)
return 0;
}
ch += (uint)*pSrc++ + 7;
}
p -= (*(ushort*)pSrc / 4);
pSrc += 2;
if (p == pDst)
{
*pszDst = (int)(pDst - pTo);
return (pSrc == pEndSrc) ? 1 : 0;
}
p -= 0x4000;
if ((p < pTo) || (pEndDst - pDst < ch + 2))
return 0;
if ((ch >= 6) && (pDst - p >= 4))
{
*(uint*)pDst = *(uint*)p;
pDst += 4;
p += 4;
ch -= 2;
while (ch >= 4)
{
*(uint*)pDst = *(uint*)p;
pDst += 4;
p += 4;
ch -= 4;
}
}
else
{
*pDst++ = *p++;
*pDst++ = *p++;
}
while (ch-- > 0)
*pDst++ = *p++;
goto LABEL_36;
}
p = pDst - (*pSrc++ * 4) - (ch / 4) - 1;
*pDst++ = *p++;
*pDst++ = *p++;
if ((p >= pTo) && (pEndDst - pDst >= 2))
goto LABEL_36;
return 0;
}
public unsafe static byte[] compress(byte[] src)
{
int sLen = src.Length;
byte[] dstBuf = new byte[sLen];
int dLen = 0;
fixed (byte* s = src, d = dstBuf)
{
byte* p = d;
if (sLen > 0xD)
{
sLen = CompressData(s, sLen, d, &dLen);
p = d + dLen;
}
if (sLen > 0)
{
byte* pFrom = s + src.Length - sLen;
if ((p == d) && (sLen <= 0xEE))
*p++ = (byte)(sLen + 0x11);
else if (sLen <= 3)
p[-2] |= (byte)sLen;
else if (sLen <= 0x12)
*p++ = (byte)(sLen - 3);
else
{
p++;
int cnt = sLen - 0x12;
if (cnt > 0xFF)
{
ulong lbl = 0x80808081 * (ulong)(cnt - 1);
int bl = (int)(lbl >> 39);
p += bl;
for (int i = 0; i < bl; i++)
cnt -= 0xFF;
}
*p++ = (byte)cnt;
}
for (int i = 0; i < sLen; i++)
*p++ = *pFrom++;
}
*p++ = 0x11;
p += 2;
dLen = (int)(p - d);
}
byte[] data = new byte[dLen];
for (int i = 0; i < dLen; i++)
data[i] = dstBuf[i];
return data;
}
unsafe static int CompressData(byte* pSrc, int szSrc, byte* pDst, int* pszDst)
{
byte*[] PtrBuf = new byte*[0x4000];
byte* pTo = pDst;
byte* pFrom = pSrc + 4;
byte* pStart = pSrc;
byte* pEnd = pSrc + szSrc;
while (true)
{
int index = (((((pFrom[3] << 6) ^ pFrom[2]) << 5) ^ pFrom[1]) << 5) ^ pFrom[0];
index += index << 5;
index = (index >> 5) & 0x3FFF;
byte* pPtr = PtrBuf[index];
if (pPtr < pSrc)
goto nextStep;
szSrc = (int)(pFrom - pPtr);
if ((szSrc == 0) || (szSrc > 0xBFFF))
goto nextStep;
if ((szSrc > 0x800) && (pPtr[3] != pFrom[3]))
{
index &= 0x7FF;
index ^= 0x201F;
pPtr = PtrBuf[index];
if (pPtr < pSrc)
goto nextStep;
szSrc = (int)(pFrom - pPtr);
if ((szSrc == 0) || (szSrc > 0xBFFF) || ((szSrc > 0x800) && (pPtr[3] != pFrom[3])))
goto nextStep;
}
if ((pPtr[0] != pFrom[0]) || (pPtr[1] != pFrom[1]) || (pPtr[2] != pFrom[2]))
goto nextStep;
PtrBuf[index] = pFrom;
int look = (int)(pFrom - pStart);
if (look != 0)
{
if (look <= 3)
pTo[-2] |= (byte)look;
else if (look <= 0x12)
*pTo++ = (byte)(look - 3);
else
{
*pTo++ = 0;
int cnt = look - 0x12;
if (cnt > 0xFF)
{
ulong lbl = 0x80808081 * (ulong)(cnt - 1);
int bl = (int)(lbl >> 39);
pTo += bl;
for (int i = 0; i < bl; i++)
cnt -= 0xFF;
}
*pTo++ = (byte)cnt;
}
for (int i = 0; i < look; i++)
*pTo++ = *pStart++;
}
pFrom += 3;
if ((*pFrom++ == pPtr[3]) && (*pFrom++ == pPtr[4]) && (*pFrom++ == pPtr[5]) &&
(*pFrom++ == pPtr[6]) && (*pFrom++ == pPtr[7]) && (*pFrom++ == pPtr[8]))
{
pPtr += 9;
while (pFrom < pEnd)
{
if (*pPtr != *pFrom)
break;
pPtr++;
pFrom++;
}
look = (int)(pFrom - pStart);
if (szSrc <= 0x4000)
{
szSrc--;
if (look <= 0x21)
*pTo++ = (byte)((look - 2) | 0x20);
else
{
*pTo++ = 0x20;
int cnt = look - 0x21;
if (cnt > 0xFF)
{
ulong lbl = 0x80808081 * (ulong)(cnt - 1);
int bl = (int)(lbl >> 39);
pTo += bl;
for (int i = 0; i < bl; i++)
cnt -= 0xFF;
}
*pTo++ = (byte)cnt;
}
}
else
{
szSrc -= 0x4000;
if (look <= 9)
*pTo++ = (byte)(((szSrc >> 11) & 8) | (look - 2) | 0x10);
else
{
*pTo++ = (byte)(((szSrc >> 11) & 8) | 0x10);
int cnt = look - 9;
if (cnt > 0xFF)
{
ulong lbl = 0x80808081 * (ulong)(cnt - 1);
int bl = (int)(lbl >> 39);
pTo += bl;
for (int i = 0; i < bl; i++)
cnt -= 0xFF;
}
*pTo++ = (byte)cnt;
}
}
*pTo++ = (byte)(szSrc << 2);
*pTo++ = (byte)(szSrc >> 6);
}
else
{
look = (int)(--pFrom - pStart);
if (szSrc <= 0x800)
{
szSrc--;
*pTo++ = (byte)(((look + 7) << 5) | ((szSrc & 7) << 2));
*pTo++ = (byte)(szSrc >> 3);
}
else if (szSrc <= 0x4000)
{
*pTo++ = (byte)((look - 2) | 0x20);
szSrc--;
*pTo++ = (byte)(szSrc << 2);
*pTo++ = (byte)(szSrc >> 6);
}
else
{
szSrc -= 0x4000;
*pTo++ = (byte)(((szSrc >> 11) & 8) | (look - 2) | 0x10);
*pTo++ = (byte)(szSrc << 2);
*pTo++ = (byte)(szSrc >> 6);
}
}
pStart = pFrom;
goto checkEnd;
nextStep:
PtrBuf[index] = pFrom++;
checkEnd:
if (pFrom >= (pEnd - 0xD))
break;
}
*pszDst = (int)(pTo - pDst);
return (int)(pEnd - pStart);
}
}
有木有C#大神 求这个（Decompressor）类的解释，如果用java应该怎样写呢？
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2条回答 默认 最新
- 2021-07-20 10:55回答 1 已采纳 代码有问题,请检查你的代码跟eclipse应该没关系 请采纳
- 2023-04-04 16:40回答 7 已采纳 该回答引用ChatGPT将C#代码转化成JavaScript代码需要注意的几个点:1. 在JavaScript中是没有指针的，需要使用数组模拟指针的操作；2. JavaScript中没有fixed关键
- 2017-07-13 19:14回答 4 已采纳 That's what the bufio package is for. It lets you turn any io.Reader into a buffered reader with N
- 2021-07-10 07:35用于 LHA 格式文件/流解压的 Java 库。
- 2018-01-09 16:28回答 2 已采纳 grpc.WithCompressor as DialOption is deprecated, according to the docs. You can use the grpc.UseC
- 2021-12-24 14:22回答 1 已采纳 jdk环境不对，你用的是什么版本的jdk.
- 2019-04-23 11:17回答 2 已采纳 是我没有关闭之前打开的文件以及没有调用结束解压的函数才会出这个问题
- 2021-03-16 12:49法直的博客 } 文件操作类 import java.io.*; import java.nio.charset.StandardCharsets; import java.nio.file.Files; import java.util.zip.DataFormatException; import java.util.zip.Deflater; import java.util.zip....
- 2021-02-26 16:04weixin_39649405的博客 } 文件操作类 import java.io.*; import java.nio.charset.StandardCharsets; import java.nio.file.Files; import java.util.zip.DataFormatException; import java.util.zip.Deflater; import java.util.zip....
- 2021-05-30 15:48Costura-Decompressor.exe file1.exe file.dll.compressed 该工具支持具有costura处理资源和压缩资源作为单个文件的可执行文件，可以使用dnSpy，ILSpy等工具将其提取。 输出如下所示： 您也可以将要解压缩的文件...
- 2021-11-10 23:22NoTutouBoy的博客 java.lang.LayerInstantiationException: Package jdk.internal.jimage.decompressor in both module java.base and module jrt.fs错误解决办法 起因： 今天写JavaWeb实验三的时候，运行.java后出现Error occurred ...
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- 2021-03-01 15:14weixin_39550486的博客 Component Details - Using IntelliJ IDEA 2017.1 CE and jdk-9-ea+154main() -Set set2 = Set.of("a", "b", "c");set2.forEach(System.out::...module-info.javamodule collection {requires java.base;}Logs...
- 2021-03-02 01:46檬chung的博客 I'm trying to decompress compressed byte array using java-lzo library. I'm following this reference.I added below maven dependency to pom.xml -org.anarres.lzolzo-core1.0.5I created one method which ac...
- 2021-03-13 21:33芰荷神明子的博客 Java反序列化漏洞简介Java序列化就是把对象转换成字节流，便于保存在内存、文件、数据库中，Java中的ObjectOutputStream类的writeObject()方法可以实现序列化。Java反序列化即逆过程，由字节流还原成对象。...
- 2021-05-23 04:23如果要以plain mode查看它，请使用gzip decompress to plain menu 。 主要特点 gzip解压缩按钮 打开* .gz文件 点击解压按钮 命令面板 打开命令面板。 选择gzip解压缩。 输入gz文件的absolute path 。 右键点击 ...
- 2019-04-05 01:12NULL 博文链接：https://bh-wang.iteye.com/blog/1517335
- 2021-02-16 01:00Amelie-大脸法语的博客 You can do as you describe, and then if you run into an error in the decompressor, conclude that the signature you found was actually compressed data. If you finish decompressing, then it's easy to ...
- 2020-04-30 12:47CHCH998的博客 Is there any way to convert Java String to a byte[] ( not the boxed Byte[] )? 有没有办法将Java String转换为b
- 2021-03-16 17:17weixin_39901213的博客 Better still, MiGz'ed files can be multithreadedly decompressed by the MiGz decompressor. On multicore machines, MiGz compression is much faster for any reasonably large file (tens of megabytes or ...
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