From b686ce8ec009372905e1d71c19323f7892589038 Mon Sep 17 00:00:00 2001
From: George Hazan <george.hazan@gmail.com>
Date: Sat, 19 May 2012 09:28:14 +0000
Subject: updater returned by request of Awkward

git-svn-id: http://svn.miranda-ng.org/main/trunk@67 1316c22d-e87f-b044-9b9b-93d7a3e3ba9c
---
 plugins/updater/unzipfile.cpp | 108 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 108 insertions(+)
 create mode 100644 plugins/updater/unzipfile.cpp

(limited to 'plugins/updater/unzipfile.cpp')

diff --git a/plugins/updater/unzipfile.cpp b/plugins/updater/unzipfile.cpp
new file mode 100644
index 0000000000..0ae83d0fc2
--- /dev/null
+++ b/plugins/updater/unzipfile.cpp
@@ -0,0 +1,108 @@
+#include "common.h"
+#include "utils.h"
+
+#include <unzip.h>
+
+extern "C" void fill_memory_filefunc64 (zlib_filefunc64_def* pzlib_filefunc_def);
+
+bool extractCurrentFile(unzFile uf, TCHAR *path)
+{
+    int err = UNZ_OK;
+    unz_file_info64 file_info;
+    char filename[MAX_PATH];
+	char buf[8192];
+
+    err = unzGetCurrentFileInfo64(uf, &file_info, filename, sizeof(filename), buf, sizeof(buf), NULL, 0);
+    if (err != UNZ_OK) return false;
+
+	// Get Unicode file name for InfoZip style archives, otherwise assume PKZip/WinZip style
+	if (file_info.size_file_extra)
+	{
+		char *p = buf; 
+		unsigned long size = min(file_info.size_file_extra, sizeof(buf));
+		while (size > 0)
+		{
+			unsigned short id =  *(unsigned short*)p;
+			unsigned len =  *(unsigned short*)(p + 2);
+			
+			if (size < (len + 4)) break;
+
+			if (id == 0x7075 && len > 5 && (len - 5) < sizeof(filename) && *(p + 4) == 1)
+			{
+				memcpy(filename, p + 9, len - 5);
+				filename[len - 5] = 0;
+				break;
+			}
+			size -= len + 4;
+			p += len + 4;
+		}
+	}
+
+	TCHAR save_file[MAX_PATH];
+	TCHAR* p = mir_utf8decodeT(filename);
+	if (p == NULL) p = mir_a2t(filename);
+	mir_sntprintf(save_file, SIZEOF(save_file), _T("%s\\%s"), path, p);
+	mir_free(p);
+
+	for (p = save_file; *p; ++p) if (*p == '/') *p = '\\'; 
+
+	if (file_info.external_fa & FILE_ATTRIBUTE_DIRECTORY)
+		CreatePath(save_file);
+	else
+	{
+		err = unzOpenCurrentFile(uf);
+		if (err != UNZ_OK) return false;
+
+		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_info.external_fa, 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_mem(char* buf, int len, TCHAR* dest)
+{
+	zlib_filefunc64_def ffunc;
+	fill_memory_filefunc64(&ffunc);
+
+	char zipfile[128];
+	mir_snprintf(zipfile, sizeof(zipfile), "%p+%x", buf, len);
+
+	unzFile uf = unzOpen2_64(zipfile, &ffunc);
+	if (uf)
+	{
+		do {
+			extractCurrentFile(uf, dest);
+		}
+		while (unzGoToNextFile(uf) == UNZ_OK);
+		unzClose(uf);
+	}
+}
-- 
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