diff --git a/expat/xmlwf/win32filemap.c b/expat/xmlwf/win32filemap.c
new file mode 100755
index 00000000..62b210cb
--- /dev/null
+++ b/expat/xmlwf/win32filemap.c
@@ -0,0 +1,50 @@
+#define STRICT 1
+#include <windows.h>
+#include <stdio.h>
+#include "filemap.h"
+
+int filemap(const char *name,
+	    void (*processor)(const void *, size_t, const char *, void *arg),
+	    void *arg)
+{
+  HANDLE f;
+  HANDLE m;
+  DWORD size;
+  DWORD sizeHi;
+  void *p;
+
+  f = CreateFile(name, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING,
+			  FILE_FLAG_SEQUENTIAL_SCAN, NULL);
+  if (f == INVALID_HANDLE_VALUE) {
+    fprintf(stderr, "%s: CreateFile failed\n", name);
+    return 0;
+  }
+  size = GetFileSize(f, &sizeHi);
+  if (sizeHi) {
+    fprintf(stderr, "%s: too big (limit 2Gb)\n", name);
+    return 0;
+  }
+  /* CreateFileMapping barfs on zero length files */
+  if (size == 0) {
+    fprintf(stderr, "%s: zero-length file\n", name);
+    return 0;
+  }
+  m = CreateFileMapping(f, NULL, PAGE_READONLY, 0, 0, NULL);
+  if (m == NULL) {
+    fprintf(stderr, "%s: CreateFileMapping failed\n", name);
+    CloseHandle(f);
+    return 0;
+  }
+  p = MapViewOfFile(m, FILE_MAP_READ, 0, 0, 0);
+  if (p == NULL) {
+    CloseHandle(m);
+    CloseHandle(f);
+    fprintf(stderr, "%s: MapViewOfFile failed\n", name);
+    return 0;
+  }
+  processor(p, size, name, arg); 
+  UnmapViewOfFile(p);
+  CloseHandle(m);
+  CloseHandle(f);
+  return 1;
+}