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diff --git a/tesseract/src/ccutil/host.h b/tesseract/src/ccutil/host.h
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+++ b/tesseract/src/ccutil/host.h
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+/******************************************************************************
+ **  Filename:       host.h
+ **  Purpose:        This is the system independent typedefs and defines
+ **  Author:         MN, JG, MD
+ **
+ **  (c) Copyright Hewlett-Packard Company, 1988-1996.
+ ** Licensed under the Apache License, Version 2.0 (the "License");
+ ** you may not use this file except in compliance with the License.
+ ** You may obtain a copy of the License at
+ ** http://www.apache.org/licenses/LICENSE-2.0
+ ** Unless required by applicable law or agreed to in writing, software
+ ** distributed under the License is distributed on an "AS IS" BASIS,
+ ** WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ ** See the License for the specific language governing permissions and
+ ** limitations under the License.
+ */
+
+#ifndef TESSERACT_CCUTIL_HOST_H_
+#define TESSERACT_CCUTIL_HOST_H_
+
+#include <tesseract/export.h>
+
+#include <climits>
+#include <limits>
+
+/* _WIN32 */
+#ifdef _WIN32
+#  ifndef NOMINMAX
+#    define NOMINMAX
+#  endif /* NOMINMAX */
+#  ifndef WIN32_LEAN_AND_MEAN
+#    define WIN32_LEAN_AND_MEAN
+#  endif
+#include <windows.h>
+#undef min
+#undef max
+#endif  // _WIN32
+
+#ifndef _WIN32
+#  ifndef PATH_MAX
+#    define MAX_PATH 4096
+#  else
+#    define MAX_PATH PATH_MAX
+#  endif
+#endif
+
+namespace tesseract {
+
+// Return true if x is within tolerance of y
+template<class T> bool NearlyEqual(T x, T y, T tolerance) {
+  T diff = x - y;
+  return diff <= tolerance && -diff <= tolerance;
+}
+
+} // namespace tesseract
+
+#endif  // TESSERACT_CCUTIL_HOST_H_