open source

2020-11-11 16:17:13 +08:00
parent 4d989f3ecb
commit bc4ca748de
2441 changed files with 623057 additions and 2 deletions
@@ -0,0 +1,145 @@
+/**
+@file			JCZlib.cpp
+@brief			
+@author			hugao
+@version		1.0
+@date			2016_5_13
+*/
+
+#include "JCZlib.h"
+#include <string>
+
+namespace laya
+{
+     //------------------------------------------------------------------------------
+    uLong getLayaBoxUncompressSize(unsigned char* p_sBuffer, int buflen, int& p_nOffset)
+    {
+        if (p_sBuffer == NULL) return 0;
+        if (buflen<24) return 0;
+        //我们特有的头 LayaBoxCompress=true
+        char sHead[21];
+        memset(sHead, 0, 21);
+        memcpy(sHead, p_sBuffer, sizeof(char) * 20);
+
+        if (strcmp(sHead, "LayaBoxCompress=true") == 0)
+        {
+            uLong nUncompressSize = *(int*)(p_sBuffer + 20);
+            p_nOffset = 20 + 4;
+            return nUncompressSize;
+        }
+        return 0;
+    }
+    //------------------------------------------------------------------------------
+    unsigned char* zlibByteArrayCompress(unsigned char* p_sBuffer, int buflen, int &realCount)
+    {
+        uLong tlen = buflen;
+        z_stream zs;
+        int err;
+        memset(&zs, 0, sizeof(zs));
+        if (deflateInit(&zs, 9))
+        {
+            printf("deflateInit() failed!\n");
+            return NULL;
+        }
+        uLong blen = deflateBound(&zs, tlen);
+        unsigned char* sUCBuffer = new unsigned char[blen];
+        zs.avail_in = buflen;
+        zs.avail_out = blen;
+        zs.next_in = p_sBuffer;
+        zs.next_out = sUCBuffer;
+
+        while (zs.total_in != buflen&&zs.total_out < blen)
+        {
+            zs.avail_in = zs.avail_out = buflen;
+            err = deflate(&zs, Z_NO_FLUSH);
+        }
+        int status = deflate(&zs, Z_NO_FLUSH);
+
+        for (;;)
+        {
+            zs.avail_out = blen;
+            err = deflate(&zs, Z_FINISH);
+            if (err == Z_STREAM_END)break;
+            if (err != Z_OK)
+            {
+                printf("deflateEnd() failed!\n");
+                return NULL;
+            }
+        }
+        if (deflateEnd(&zs) != Z_OK)
+        {
+            printf("deflateEnd() failed!\n");
+            return NULL;
+        }
+        realCount = zs.total_out;
+        return sUCBuffer;
+
+
+        /*uLong tlen = buflen;
+        uLong blen = compressBound(tlen);
+        unsigned char* sUCBuffer = new unsigned char[blen];
+        if (compress(sUCBuffer, &blen, p_sBuffer, tlen) != Z_OK)
+        {
+        printf("compress failed!\n");
+        return NULL;
+        }
+        else
+        {
+        realCount = blen;
+        return sUCBuffer;
+        }*/
+    }
+    //------------------------------------------------------------------------------
+    unsigned char* zlibByteArrayUnCompress(unsigned char* p_sBuffer, int buflen, int &realCount)
+    {
+        uLong tlen = buflen;
+        z_stream zs;
+        memset(&zs, 0, sizeof(zs));
+        //uLong blen = deflateBound(&zs, tlen);
+        unsigned char* sUCBuffer = new unsigned char[1024];
+        unsigned char* pCurBuff = sUCBuffer;
+        int curOutBuffSz = 1024;
+        unsigned char buf[1024];
+        zs.avail_in = buflen;
+        zs.avail_out = 1024;
+        zs.next_in = p_sBuffer;
+        zs.next_out = buf;
+        if (inflateInit(&zs))
+        {
+            printf("inflateInit() failed!\n");
+            return NULL;
+        }
+        while (zs.avail_in > 0)
+        {
+            int status = inflate(&zs, Z_NO_FLUSH);
+            if (zs.avail_in != 0)
+            {
+                unsigned char* old = sUCBuffer;
+                curOutBuffSz += 1024;
+                sUCBuffer = new unsigned char[curOutBuffSz];
+                memcpy(sUCBuffer, old, zs.total_out - 1024);
+                memcpy(sUCBuffer + zs.total_out - 1024, buf, 1024);
+                pCurBuff = sUCBuffer + zs.total_out;
+                delete[] old;
+                zs.next_out = buf;
+                zs.avail_out = 1024;
+            }
+            else {
+                memcpy(pCurBuff, buf, 1024 - zs.avail_out);
+                break;
+            }
+
+        }
+        if (inflateEnd(&zs) != Z_OK)
+        {
+            printf("deflateEnd() failed!\n");
+            return NULL;
+        }
+        realCount = zs.total_out;
+        return sUCBuffer;
+    }
+}
+//------------------------------------------------------------------------------
+
+
+//-----------------------------END FILE--------------------------------