Initial creation

1 files changed, 67 insertions, 0 deletions

diff --git a/src/SFileExtractFile.cpp b/src/SFileExtractFile.cpp
new file mode 100644
index 0000000..c8053ed
--- /dev/null
+++ b/src/SFileExtractFile.cpp
@@ -0,0 +1,67 @@
+/*****************************************************************************/
+/* SFileExtractFile.cpp                   Copyright (c) Ladislav Zezula 2003 */
+/*---------------------------------------------------------------------------*/
+/* Simple extracting utility                                                 */
+/*---------------------------------------------------------------------------*/
+/*   Date    Ver   Who  Comment                                              */
+/* --------  ----  ---  -------                                              */
+/* 20.06.03  1.00  Lad  The first version of SFileExtractFile.cpp            */
+/*****************************************************************************/
+
+#define __STORMLIB_SELF__
+#include "StormLib.h"
+#include "StormCommon.h"
+
+bool WINAPI SFileExtractFile(HANDLE hMpq, const char * szToExtract, const TCHAR * szExtracted, DWORD dwSearchScope)
+{
+    TFileStream * pLocalFile = NULL;
+    HANDLE hMpqFile = NULL;
+    int nError = ERROR_SUCCESS;
+
+    // Open the MPQ file
+    if(nError == ERROR_SUCCESS)
+    {
+        if(!SFileOpenFileEx(hMpq, szToExtract, dwSearchScope, &hMpqFile))
+            nError = GetLastError();
+    }
+
+    // Create the local file
+    if(nError == ERROR_SUCCESS)
+    {
+        pLocalFile = FileStream_CreateFile(szExtracted, STREAM_PROVIDER_LINEAR | BASE_PROVIDER_FILE);
+        if(pLocalFile == NULL)
+            nError = GetLastError();
+    }
+
+    // Copy the file's content
+    if(nError == ERROR_SUCCESS)
+    {
+        char  szBuffer[0x1000];
+        DWORD dwTransferred;
+
+        for(;;)
+        {
+            // dwTransferred is only set to nonzero if something has been read.
+            // nError can be ERROR_SUCCESS or ERROR_HANDLE_EOF
+            if(!SFileReadFile(hMpqFile, szBuffer, sizeof(szBuffer), &dwTransferred, NULL))
+                nError = GetLastError();
+            if(nError == ERROR_HANDLE_EOF)
+                nError = ERROR_SUCCESS;
+            if(dwTransferred == 0)
+                break;
+
+            // If something has been actually read, write it
+            if(!FileStream_Write(pLocalFile, NULL, szBuffer, dwTransferred))
+                nError = GetLastError();
+        }
+    }
+
+    // Close the files
+    if(hMpqFile != NULL)
+        SFileCloseFile(hMpqFile);
+    if(pLocalFile != NULL)
+        FileStream_Close(pLocalFile);
+    if(nError != ERROR_SUCCESS)
+        SetLastError(nError);
+    return (nError == ERROR_SUCCESS);
+}