4.44 beta

2025-12-08 04:07:02 -06:00 · 2007-01-20 00:00:00 +00:00
parent 804edc5756
commit d9666cf046
1331 changed files with 10535 additions and 13791 deletions
--- a/C/Archive/7z/7zExtract.c
+++ b/C/Archive/7z/7zExtract.c
@@ -0,0 +1,118 @@
+/* 7zExtract.c */
+
+#include "7zExtract.h"
+#include "7zDecode.h"
+#include "../../7zCrc.h"
+
+SZ_RESULT SzExtract(
+    ISzInStream *inStream, 
+    CArchiveDatabaseEx *db,
+    UInt32 fileIndex,
+    UInt32 *blockIndex,
+    Byte **outBuffer, 
+    size_t *outBufferSize,
+    size_t *offset, 
+    size_t *outSizeProcessed, 
+    ISzAlloc *allocMain,
+    ISzAlloc *allocTemp)
+{
+  UInt32 folderIndex = db->FileIndexToFolderIndexMap[fileIndex];
+  SZ_RESULT res = SZ_OK;
+  *offset = 0;
+  *outSizeProcessed = 0;
+  if (folderIndex == (UInt32)-1)
+  {
+    allocMain->Free(*outBuffer);
+    *blockIndex = folderIndex;
+    *outBuffer = 0;
+    *outBufferSize = 0;
+    return SZ_OK;
+  }
+
+  if (*outBuffer == 0 || *blockIndex != folderIndex)
+  {
+    CFolder *folder = db->Database.Folders + folderIndex;
+    CFileSize unPackSize = SzFolderGetUnPackSize(folder);
+    #ifndef _LZMA_IN_CB
+    CFileSize packSize = SzArDbGetFolderFullPackSize(db, folderIndex);
+    Byte *inBuffer = 0;
+    size_t processedSize;
+    #endif
+    if (unPackSize != (size_t)unPackSize)
+      return SZE_OUTOFMEMORY;
+    *blockIndex = folderIndex;
+    allocMain->Free(*outBuffer);
+    *outBuffer = 0;
+    
+    RINOK(inStream->Seek(inStream, SzArDbGetFolderStreamPos(db, folderIndex, 0)));
+    
+    #ifndef _LZMA_IN_CB
+    if (packSize != 0)
+    {
+      inBuffer = (Byte *)allocTemp->Alloc((size_t)packSize);
+      if (inBuffer == 0)
+        return SZE_OUTOFMEMORY;
+    }
+    res = inStream->Read(inStream, inBuffer, (size_t)packSize, &processedSize);
+    if (res == SZ_OK && processedSize != (size_t)packSize)
+      res = SZE_FAIL;
+    #endif
+    if (res == SZ_OK)
+    {
+      *outBufferSize = (size_t)unPackSize;
+      if (unPackSize != 0)
+      {
+        *outBuffer = (Byte *)allocMain->Alloc((size_t)unPackSize);
+        if (*outBuffer == 0)
+          res = SZE_OUTOFMEMORY;
+      }
+      if (res == SZ_OK)
+      {
+        size_t outRealSize;
+        res = SzDecode(db->Database.PackSizes + 
+          db->FolderStartPackStreamIndex[folderIndex], folder, 
+          #ifdef _LZMA_IN_CB
+          inStream,
+          #else
+          inBuffer, 
+          #endif
+          *outBuffer, (size_t)unPackSize, &outRealSize, allocTemp);
+        if (res == SZ_OK)
+        {
+          if (outRealSize == (size_t)unPackSize)
+          {
+            if (folder->UnPackCRCDefined)
+            {
+              if (!CrcVerifyDigest(folder->UnPackCRC, *outBuffer, (size_t)unPackSize))
+                res = SZE_FAIL;
+            }
+          }
+          else
+            res = SZE_FAIL;
+        }
+      }
+    }
+    #ifndef _LZMA_IN_CB
+    allocTemp->Free(inBuffer);
+    #endif
+  }
+  if (res == SZ_OK)
+  {
+    UInt32 i; 
+    CFileItem *fileItem = db->Database.Files + fileIndex;
+    *offset = 0;
+    for(i = db->FolderStartFileIndex[folderIndex]; i < fileIndex; i++)
+      *offset += (UInt32)db->Database.Files[i].Size;
+    *outSizeProcessed = (size_t)fileItem->Size;
+    if (*offset + *outSizeProcessed > *outBufferSize)
+      return SZE_FAIL;
+    {
+      if (fileItem->IsFileCRCDefined)
+      {
+        if (!CrcVerifyDigest(fileItem->FileCRC, *outBuffer + *offset, *outSizeProcessed))
+          res = SZE_FAIL;
+      }
+    }
+  }
+  return res;
+}