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diff --git a/deps/icu-small/source/tools/toolutil/unewdata.h b/deps/icu-small/source/tools/toolutil/unewdata.h
new file mode 100644
index 0000000000..d25b8e9f74
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+++ b/deps/icu-small/source/tools/toolutil/unewdata.h
@@ -0,0 +1,111 @@
+/*
+*******************************************************************************
+*
+*   Copyright (C) 1999-2010, International Business Machines
+*   Corporation and others.  All Rights Reserved.
+*
+*******************************************************************************
+*   file name:  unewdata.h
+*   encoding:   US-ASCII
+*   tab size:   8 (not used)
+*   indentation:4
+*
+*   created on: 1999oct25
+*   created by: Markus W. Scherer
+*/
+
+#ifndef __UNEWDATA_H__
+#define __UNEWDATA_H__
+
+#include "unicode/utypes.h"
+#include "unicode/udata.h"
+
+/* API for writing data -----------------------------------------------------*/
+
+/** @memo Forward declaration of the data memory creation type. */
+typedef struct UNewDataMemory UNewDataMemory;
+
+/**
+ * Create a new binary data file.
+ * The file-writing <code>udata_</code> functions facilitate writing
+ * binary data files that can be read by ICU's <code>udata</code> API.
+ * This function opens a new file with a filename determined from its
+ * parameters - of the form "name.type".
+ * It then writes a short header, followed by the <code>UDataInfo</code>
+ * structure and, optionally, by the comment string.
+ * It then writes padding bytes to round up to a multiple of 16 bytes.
+ * Subsequent write operations will thus start at an offset in the file
+ * that is a multiple of 16. <code>udata_getMemory()</code> will return
+ * a pointer to this same starting offset.
+ *
+ * See udata.h .
+ *
+ * @param dir A string that specifies the directory where the data will be
+ *            written. If <code>NULL</code>, then
+ *            <code>u_getDataDirectory</code> is used.
+ * @param type A string that specifies the type of data to be written.
+ *             For example, resource bundles are written with type "res",
+ *             conversion tables with type "cnv".
+ *             This may be <code>NULL</code> or empty.
+ * @param name A string that specifies the name of the data.
+ * @param pInfo A pointer to a correctly filled <code>UDataInfo</code>
+ *              structure that will be copied into the file.
+ * @param comment A string (e.g., a copyright statement) that will be
+ *                copied into the file if it is not <code>NULL</code>
+ *                or empty. This string serves only as a comment in the binary
+ *                file. It will not be accessible by any API.
+ * @param pErrorCode An ICU UErrorCode parameter. It must not be <code>NULL</code>.
+ */
+U_CAPI UNewDataMemory * U_EXPORT2
+udata_create(const char *dir, const char *type, const char *name,
+             const UDataInfo *pInfo,
+             const char *comment,
+             UErrorCode *pErrorCode);
+
+/** @memo Close a newly written binary file. */
+U_CAPI uint32_t U_EXPORT2
+udata_finish(UNewDataMemory *pData, UErrorCode *pErrorCode);
+
+/** @memo Write a dummy data file. */
+U_CAPI void U_EXPORT2
+udata_createDummy(const char *dir, const char *type, const char *name, UErrorCode *pErrorCode);
+
+/** @memo Write an 8-bit byte to the file. */
+U_CAPI void U_EXPORT2
+udata_write8(UNewDataMemory *pData, uint8_t byte);
+
+/** @memo Write a 16-bit word to the file. */
+U_CAPI void U_EXPORT2
+udata_write16(UNewDataMemory *pData, uint16_t word);
+
+/** @memo Write a 32-bit word to the file. */
+U_CAPI void U_EXPORT2
+udata_write32(UNewDataMemory *pData, uint32_t wyde);
+
+/** @memo Write a block of bytes to the file. */
+U_CAPI void U_EXPORT2
+udata_writeBlock(UNewDataMemory *pData, const void *s, int32_t length);
+
+/** @memo Write a block of arbitrary padding bytes to the file. */
+U_CAPI void U_EXPORT2
+udata_writePadding(UNewDataMemory *pData, int32_t length);
+
+/** @memo Write a <code>char*</code> string of platform "invariant characters" to the file. */
+U_CAPI void U_EXPORT2
+udata_writeString(UNewDataMemory *pData, const char *s, int32_t length);
+
+/** @memo Write a <code>UChar*</code> string of Unicode character code units to the file. */
+U_CAPI void U_EXPORT2
+udata_writeUString(UNewDataMemory *pData, const UChar *s, int32_t length);
+
+
+/*
+ * Hey, Emacs, please set the following:
+ *
+ * Local Variables:
+ * indent-tabs-mode: nil
+ * End:
+ *
+ */
+
+#endif