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diff --git a/intl/icu/source/tools/toolutil/toolutil.h b/intl/icu/source/tools/toolutil/toolutil.h
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+// Copyright (C) 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+*
+*   Copyright (C) 1999-2013, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*
+*******************************************************************************
+*   file name:  toolutil.h
+*   encoding:   US-ASCII
+*   tab size:   8 (not used)
+*   indentation:4
+*
+*   created on: 1999nov19
+*   created by: Markus W. Scherer
+*
+*   This file defines utility functions for ICU tools like genccode.
+*/
+
+#ifndef __TOOLUTIL_H__
+#define __TOOLUTIL_H__
+
+#include "unicode/utypes.h"
+
+
+#ifdef __cplusplus
+
+#include "unicode/errorcode.h"
+
+U_NAMESPACE_BEGIN
+
+/**
+ * ErrorCode subclass for use in ICU command-line tools.
+ * The destructor calls handleFailure() which calls exit(errorCode) when isFailure().
+ */
+class U_TOOLUTIL_API IcuToolErrorCode : public ErrorCode {
+public:
+    /**
+     * @param loc A short string describing where the IcuToolErrorCode is used.
+     */
+    IcuToolErrorCode(const char *loc) : location(loc) {}
+    virtual ~IcuToolErrorCode();
+protected:
+    virtual void handleFailure() const;
+private:
+    const char *location;
+};
+
+U_NAMESPACE_END
+
+#endif
+
+/*
+ * For Windows, a path/filename may be the short (8.3) version
+ * of the "real", long one. In this case, the short one
+ * is abbreviated and contains a tilde etc.
+ * This function returns a pointer to the original pathname
+ * if it is the "real" one itself, and a pointer to a static
+ * buffer (not thread-safe) containing the long version
+ * if the pathname is indeed abbreviated.
+ *
+ * On platforms other than Windows, this function always returns
+ * the input pathname pointer.
+ *
+ * This function is especially useful in tools that are called
+ * by a batch file for loop, which yields short pathnames on Win9x.
+ */
+U_CAPI const char * U_EXPORT2
+getLongPathname(const char *pathname);
+
+/**
+ * Find the basename at the end of a pathname, i.e., the part
+ * after the last file separator, and return a pointer
+ * to this part of the pathname.
+ * If the pathname only contains a basename and no file separator,
+ * then the pathname pointer itself is returned.
+ **/
+U_CAPI const char * U_EXPORT2
+findBasename(const char *filename);
+
+/**
+ * Find the directory name of a pathname, that is, everything
+ * up to but not including the last file separator. 
+ *
+ * If successful, copies the directory name into the output buffer along with
+ * a terminating NULL. 
+ *
+ * If there isn't a directory name in the path, it returns an empty string.
+ * @param path the full pathname to inspect. 
+ * @param buffer the output buffer
+ * @param bufLen the output buffer length
+ * @param status error code- may return U_BUFFER_OVERFLOW_ERROR if bufLen is too small.
+ * @return If successful, a pointer to the output buffer. If failure or bufLen is too small, NULL.
+ **/
+U_CAPI const char * U_EXPORT2
+findDirname(const char *path, char *buffer, int32_t bufLen, UErrorCode* status);
+
+/*
+ * Return the current year in the Gregorian calendar. Used for copyright generation.
+ */
+U_CAPI int32_t U_EXPORT2
+getCurrentYear(void);
+
+/*
+ * Creates a directory with pathname.
+ *
+ * @param status Set to an error code when mkdir failed.
+ */
+U_CAPI void U_EXPORT2
+uprv_mkdir(const char *pathname, UErrorCode *status);
+
+#if !UCONFIG_NO_FILE_IO
+/**
+ * Return TRUE if the named item exists
+ * @param file filename
+ * @return TRUE if named item (file, dir, etc) exists, FALSE otherwise
+ */
+U_CAPI UBool U_EXPORT2
+uprv_fileExists(const char *file);
+#endif
+
+/**
+ * Return the modification date for the specified file or directory.
+ * Return value is undefined if there was an error.
+ */
+/*U_CAPI UDate U_EXPORT2
+uprv_getModificationDate(const char *pathname, UErrorCode *status);
+*/
+/*
+ * Returns the modification
+ *
+ * @param status Set to an error code when mkdir failed.
+ */
+
+/*
+ * UToolMemory is used for generic, custom memory management.
+ * It is allocated with enough space for count*size bytes starting
+ * at array.
+ * The array is declared with a union of large data types so
+ * that its base address is aligned for any types.
+ * If size is a multiple of a data type size, then such items
+ * can be safely allocated inside the array, at offsets that
+ * are themselves multiples of size.
+ */
+struct UToolMemory;
+typedef struct UToolMemory UToolMemory;
+
+/**
+ * Open a UToolMemory object for allocation of initialCapacity to maxCapacity
+ * items with size bytes each.
+ */
+U_CAPI UToolMemory * U_EXPORT2
+utm_open(const char *name, int32_t initialCapacity, int32_t maxCapacity, int32_t size);
+
+/**
+ * Close a UToolMemory object.
+ */
+U_CAPI void U_EXPORT2
+utm_close(UToolMemory *mem);
+
+/**
+ * Get the pointer to the beginning of the array of items.
+ * The pointer becomes invalid after allocation of new items.
+ */
+U_CAPI void * U_EXPORT2
+utm_getStart(UToolMemory *mem);
+
+/**
+ * Get the current number of items.
+ */
+U_CAPI int32_t U_EXPORT2
+utm_countItems(UToolMemory *mem);
+
+/**
+ * Allocate one more item and return the pointer to its start in the array.
+ */
+U_CAPI void * U_EXPORT2
+utm_alloc(UToolMemory *mem);
+
+/**
+ * Allocate n items and return the pointer to the start of the first one in the array.
+ */
+U_CAPI void * U_EXPORT2
+utm_allocN(UToolMemory *mem, int32_t n);
+
+#endif