file2lz4c for making installer binaries

1 files changed, 81 insertions, 0 deletions

diff --git a/file2lz4c.cpp b/file2lz4c.cpp
new file mode 100644
index 00000000..7715ba87
--- /dev/null
+++ b/file2lz4c.cpp
@@ -0,0 +1,81 @@
+/*
+ * ZeroTier One - Global Peer to Peer Ethernet
+ * Copyright (C) 2012-2013  ZeroTier Networks LLC
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * --
+ *
+ * ZeroTier may be used and distributed under the terms of the GPLv3, which
+ * are available at: http://www.gnu.org/licenses/gpl-3.0.html
+ *
+ * If you would like to embed ZeroTier into a commercial application or
+ * redistribute it in a modified binary form, please contact ZeroTier Networks
+ * LLC. Start here: http://www.zerotier.com/
+ */
+
+/* Converts files to LZ4-compressed C arrays, used in building installers. */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <iostream>
+
+#include "node/Utils.hpp"
+
+#include "ext/lz4/lz4.h"
+#include "ext/lz4/lz4hc.h"
+
+using namespace ZeroTier;
+
+int main(int argc,char **argv)
+{
+	char tmp[16];
+
+	if (argc != 3) {
+		std::cerr << "Usage: " << argv[0] << " <file> <name of C array>" << std::endl;
+		return -1;
+	}
+
+	std::string buf;
+	if (!Utils::readFile(argv[1],buf)) {
+		std::cerr << "Could not read " << argv[1] << std::endl;
+		return -1;
+	}
+
+	unsigned char *compbuf = new unsigned char[LZ4_compressBound((int)buf.length())];
+	int complen = LZ4_compressHC(buf.data(),(char *)compbuf,(int)buf.length());
+
+	if (complen <= 0) {
+		std::cerr << "Error compressing data." << std::endl;
+		return -1;
+	}
+
+	std::cout << "#define " << argv[2] << "_UNCOMPRESSED_LEN " << buf.length() << std::endl;
+	std::cout << "#define " << argv[2] << "_LZ4_LEN " << complen << std::endl;
+	std::cout << "static const unsigned char " << argv[2] << '[' << argv[2] << "_LZ4_LEN] = {";
+	for(int i=0;i<complen;++i) {
+		if (!(i % 15))
+			std::cout << std::endl << '\t';
+		Utils::snprintf(tmp,sizeof(tmp),"%.2x",(unsigned int)compbuf[i]);
+		std::cout << "0x" << tmp;
+		if (i != (complen - 1))
+			std::cout << ',';
+	}
+	std::cout << std::endl << "};" << std::endl;
+
+	delete [] compbuf;
+	return 0;
+}