public static void addFilesToExistingZip(File zipFile,
			 File[] files) throws IOException {
                // get a temp file
		File tempFile = File.createTempFile(zipFile.getName(), null);
                // delete it, otherwise you cannot rename your existing zip to it.
		tempFile.delete();

		boolean renameOk=zipFile.renameTo(tempFile);
		if (!renameOk)
		{
			throw new RuntimeException("could not rename the file "+zipFile.getAbsolutePath()+" to "+tempFile.getAbsolutePath());
		}
		byte[] buf = new byte[1024];
		
		ZipInputStream zin = new ZipInputStream(new FileInputStream(tempFile));
		ZipOutputStream out = new ZipOutputStream(new FileOutputStream(zipFile));
		
		ZipEntry entry = zin.getNextEntry();
		while (entry != null) {
			String name = entry.getName();
			boolean notInFiles = true;
			for (File f : files) {
				if (f.getName().equals(name)) {
					notInFiles = false;
					break;
				}
			}
			if (notInFiles) {
				// Add ZIP entry to output stream.
				out.putNextEntry(new ZipEntry(name));
				// Transfer bytes from the ZIP file to the output file
				int len;
				while ((len = zin.read(buf)) > 0) {
					out.write(buf, 0, len);
				}
			}
			entry = zin.getNextEntry();
		}
		// Close the streams		
		zin.close();
		// Compress the files
		for (int i = 0; i < files.length; i++) {
			InputStream in = new FileInputStream(files[i]);
			// Add ZIP entry to output stream.
			out.putNextEntry(new ZipEntry(files[i].getName()));
			// Transfer bytes from the file to the ZIP file
			int len;
			while ((len = in.read(buf)) > 0) {
				out.write(buf, 0, len);
			}
			// Complete the entry
			out.closeEntry();
			in.close();
		}
		// Complete the ZIP file
		out.close();
		tempFile.delete();
	}

#include <stdio.h>
#include <stdlib.h>
#include <memory.h>
#include <string.h>

char *getBufferAsBinaryString(void *in)
{
	int pos=0;
	char result;
	char bitstring[256];
	memset(bitstring, 0, 256);
	unsigned int *input= (unsigned int *)in;
	for(int i=31;i>=0;i--)
	{
		if (((*input >> i) & 1)) result = '1';
		else result = '0';
		bitstring[pos] = result;
		if ((i>0) && ((i)%4)==0)
		{
			pos++;
			bitstring[pos] = ' ';
		}
		pos++;
	}
	return bitstring;
}
int main(int argc, char* argv[])
{
	int i=53003;
	char buffer[1024];
	char *s=getBufferAsBinaryString(&i);
	strcpy(buffer, s);
	printf("%s\n", buffer);
}

is-conv-word?: func [word][
	all [
		("to-" =  copy/part to-string word 3)
		(not error? try [
			datatype! = type? get to-word join copy (at to-string word 4) "!"
		])
	]
]
conversion-words: does [
	lib/ser/keep-if first system/words :is-conv-word?
]
print mold conversion-words