New file.

git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/base/trunk@1233 72102866-910b-0410-8b05-ffd578937521

Testing/coder.m

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+/* A demonstration of writing and reading GNU Objective C objects to a file. */
+
+#include <objects/Archiver.h>
+#include <objects/BinaryCStream.h>
+#include <objects/Array.h>
+#include <objects/Dictionary.h>
+#include <objects/NSString.h>
+#include <Foundation/NSAutoreleasePool.h>
+#include <Foundation/NSValue.h>
+
+int main(int argc, char *argv[])
+{
+  id array, dictionary;
+  id archiver;
+  id name;
+  id arp;
+  int i;
+  Class cstream_class;
+  
+  if (argc > 1)
+    cstream_class = objc_get_class (argv[1]);
+  else
+    cstream_class = [BinaryCStream class];
+
+  [NSObject enableDoubleReleaseCheck: YES];
+  arp = [[NSAutoreleasePool alloc] init];
+
+  /* Create an Array and Dictionary */
+  array = [Array new];
+  dictionary = [Dictionary new];
+
+  for (i = 0; i < 6; i++)
+    {
+      [array addObject: [NSNumber numberWithInt: i]];
+      [dictionary putObject: [NSNumber numberWithInt: i] 
+		  atKey: [NSNumber numberWithInt: i*i]];
+    }
+  [array printForDebugger];
+  [dictionary printForDebugger];
+
+  /* Write them to a file */
+
+  /* Create an instances of the Archiver class, specify that we 
+     want human-readable "Text"-style, instead of "Binary"-style
+     coding. */
+  archiver = [[Archiver alloc] initForWritingToFile: @"./coder.dat"
+			       withCStreamClass: cstream_class];
+  [archiver encodeObject: array 
+	    withName: @"Test Array"];
+  [archiver encodeObject: dictionary
+	    withName: @"Test Dictionary"];
+
+  /* Release the objects that were coded */
+  [array release];
+  [dictionary release];
+
+  /* Close the archiver, (and thus flush the stream); then release it.
+     We must separate the idea of "closing" a stream and
+     "deallocating" a stream because of delays in deallocation due to
+     -autorelease. */
+  [archiver close];
+  [archiver release];
+
+
+  /* Read them back in from the file */
+
+  /* First create the unarchiver */
+  archiver = [Unarchiver newReadingFromFile: @"./coder.dat"];
+
+  /* Read in the Array */
+  [archiver decodeObjectAt: &array withName: &name];
+  printf("got object named %@\n", name);
+
+  /* Read in the Dictionary */
+  [archiver decodeObjectAt: &dictionary withName: &name];
+  printf("got object named %@\n", name);
+
+  /* Display what we read, to make sure it matches what we wrote */
+  [array printForDebugger];
+  [dictionary printForDebugger];
+
+  /* Relase the objects we read */
+  [array release];
+  [dictionary release];
+
+  /* Release the unarchiver. */
+  [archiver release];
+
+  /* Do the autorelease. */
+  [arp release];
+  
+  exit(0);
+}