1 files changed, 76 insertions, 0 deletions
diff --git a/updater/unzipfile.cpp b/updater/unzipfile.cpp
new file mode 100644
index 0000000..1128698
--- /dev/null
+++ b/updater/unzipfile.cpp
@@ -0,0 +1,76 @@
+#include "common.h"
+#include "utils.h"
+
+#include <unzip.h>
+#include <iowin32.h>
+
+bool extractCurrentFile(unzFile uf, TCHAR *path)
+{
+    int err = UNZ_OK;
+    unz_file_info64 file_info;
+    char filename_inzip[MAX_PATH];
+	char buf[8192];
+
+    err = unzGetCurrentFileInfo64(uf, &file_info, filename_inzip, sizeof(filename_inzip), NULL, 0, buf,sizeof(buf));
+    if (err != UNZ_OK) return false;
+
+	err = unzOpenCurrentFile(uf);
+	if (err != UNZ_OK) return false;
+
+	TCHAR save_file[MAX_PATH];
+	TCHAR* p = mir_utf8decodeT(filename_inzip);
+	mir_sntprintf(save_file, SIZEOF(save_file), _T("%s\\%s"), path, p);
+	mir_free(p);
+
+	for (p = save_file; *p; ++p) if (*p == '/') *p = '\\'; 
+
+	p = _tcsrchr(save_file, '\\'); if (p) *p = 0;
+	CreatePath(save_file);
+	if (p) *p = '\\';
+
+	HANDLE hFile = CreateFile(save_file, GENERIC_WRITE, FILE_SHARE_WRITE, 0, 
+		CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0);
+	
+	if (hFile != INVALID_HANDLE_VALUE)
+    {
+		for (;;)
+		{
+			err = unzReadCurrentFile(uf, buf, sizeof(buf));
+			if (err <= 0) break;
+
+			DWORD bytes;
+			if (!WriteFile(hFile, buf, err, &bytes, FALSE))
+			{
+				err = UNZ_ERRNO;
+				break;
+			}
+		}
+
+		FILETIME ftLocal, ftCreate, ftLastAcc, ftLastWrite;
+		GetFileTime(hFile, &ftCreate, &ftLastAcc, &ftLastWrite);
+		DosDateTimeToFileTime(HIWORD(file_info.dosDate), LOWORD(file_info.dosDate), &ftLocal);
+		LocalFileTimeToFileTime(&ftLocal, &ftLastWrite);
+		SetFileTime(hFile, &ftCreate, &ftLastAcc, &ftLastWrite);
+
+        CloseHandle(hFile);
+
+        unzCloseCurrentFile(uf); /* don't lose the error */
+    }
+	return true;
+}
+
+void unzip_file(TCHAR* zipfile, TCHAR* dest)
+{
+	zlib_filefunc64_def ffunc;
+	fill_win32_filefunc64(&ffunc);
+
+	unzFile uf = unzOpen2_64(zipfile, &ffunc);
+	if (uf)
+	{
+		do {
+			extractCurrentFile(uf, dest);
+		}
+		while (unzGoToNextFile(uf) == UNZ_OK);
+		unzClose(uf);
+	}
+}