1 files changed, 60 insertions, 0 deletions
diff --git a/ACE/examples/Mem_Map/file-reverse/file-reverse.cpp b/ACE/examples/Mem_Map/file-reverse/file-reverse.cpp
new file mode 100644
index 00000000000..e439d6f18ff
--- /dev/null
+++ b/ACE/examples/Mem_Map/file-reverse/file-reverse.cpp
@@ -0,0 +1,60 @@
+// $Id$
+
+// Print a file in reverse by using the ACE memory mapped file
+// wrapper.  It is SO easy to do compared with alternatives!
+
+#include "ace/OS_main.h"
+#include "ace/Mem_Map.h"
+#include "ace/Log_Msg.h"
+#include "ace/Truncate.h"
+
+
+
+static void
+putline (const char *s)
+{
+  while (putchar (*s++) != '\n')
+    continue;
+}
+
+static void
+print_array_in_reverse (char *array,
+                        int size)
+{
+  if (size <= 0)
+    return;
+
+  size--;
+
+  if (array[size] == '\0')
+    array[size] = '\n';
+
+  while (--size >= 0)
+    if (array[size] == '\n')
+      putline (array + size + 1);
+
+  putline (array);
+}
+
+int
+ACE_TMAIN (int argc, ACE_TCHAR **argv)
+{
+  ACE_LOG_MSG->open (argv[0]);
+
+  if (argc != 2)
+    ACE_ERROR_RETURN ((LM_ERROR,
+                       "usage: %n file\n"),
+                      -1);
+
+  ACE_Mem_Map mmap;
+
+  if (mmap.map (argv[1], static_cast<size_t> (-1), O_RDWR) == -1)
+    ACE_ERROR_RETURN ((LM_ERROR,
+                       "%n: %p\n",
+                       "mmap"),
+                      -1);
+
+  print_array_in_reverse ((char *) mmap.addr (),
+                          ACE_Utils::truncate_cast<int> (mmap.size ()));
+  return 0;
+}