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+/*
+ * Copyright 2001-2004 Unicode, Inc.
+ *
+ * Disclaimer
+ *
+ * This source code is provided as is by Unicode, Inc. No claims are
+ * made as to fitness for any particular purpose. No warranties of any
+ * kind are expressed or implied. The recipient agrees to determine
+ * applicability of information provided. If this file has been
+ * purchased on magnetic or optical media from Unicode, Inc., the
+ * sole remedy for any claim will be exchange of defective media
+ * within 90 days of receipt.
+ *
+ * Limitations on Rights to Redistribute This Code
+ *
+ * Unicode, Inc. hereby grants the right to freely use the information
+ * supplied in this file in the creation of products supporting the
+ * Unicode Standard, and to make copies of this file in any form
+ * for internal or external distribution as long as this notice
+ * remains attached.
+ */
+
+/* ---------------------------------------------------------------------
+
+Conversions between UTF32, UTF-16, and UTF-8.  Header file.
+
+Several funtions are included here, forming a complete set of
+conversions between the three formats.  UTF-7 is not included
+here, but is handled in a separate source file.
+
+Each of these routines takes pointers to input buffers and output
+buffers.  The input buffers are const.
+
+Each routine converts the text between *sourceStart and sourceEnd,
+putting the result into the buffer between *targetStart and
+targetEnd. Note: the end pointers are *after* the last item: e.g.
+*(sourceEnd - 1) is the last item.
+
+The return result indicates whether the conversion was successful,
+and if not, whether the problem was in the source or target buffers.
+(Only the first encountered problem is indicated.)
+
+After the conversion, *sourceStart and *targetStart are both
+updated to point to the end of last text successfully converted in
+the respective buffers.
+
+Input parameters:
+sourceStart - pointer to a pointer to the source buffer.
+The contents of this are modified on return so that
+it points at the next thing to be converted.
+targetStart - similarly, pointer to pointer to the target buffer.
+sourceEnd, targetEnd - respectively pointers to the ends of the
+two buffers, for overflow checking only.
+
+These conversion functions take a ConversionFlags argument. When this
+flag is set to strict, both irregular sequences and isolated surrogates
+will cause an error.  When the flag is set to lenient, both irregular
+sequences and isolated surrogates are converted.
+
+Whether the flag is strict or lenient, all illegal sequences will cause
+an error return. This includes sequences such as: <F4 90 80 80>, <C0 80>,
+or <A0> in UTF-8, and values above 0x10FFFF in UTF-32. Conformant code
+must check for illegal sequences.
+
+When the flag is set to lenient, characters over 0x10FFFF are converted
+to the replacement character; otherwise (when the flag is set to strict)
+they constitute an error.
+
+Output parameters:
+The value "sourceIllegal" is returned from some routines if the input
+sequence is malformed.  When "sourceIllegal" is returned, the source
+value will point to the illegal value that caused the problem. E.g.,
+in UTF-8 when a sequence is malformed, it points to the start of the
+malformed sequence.
+
+Author: Mark E. Davis, 1994.
+Rev History: Rick McGowan, fixes & updates May 2001.
+Fixes & updates, Sept 2001.
+
+------------------------------------------------------------------------ */
+
+/* ---------------------------------------------------------------------
+The following 4 definitions are compiler-specific.
+The C standard does not guarantee that wchar_t has at least
+16 bits, so wchar_t is no less portable than unsigned short!
+All should be unsigned values to avoid sign extension during
+bit mask & shift operations.
+------------------------------------------------------------------------ */
+
+typedef unsigned long	UTF32;	/* at least 32 bits */
+typedef unsigned short	UTF16;	/* at least 16 bits */
+typedef unsigned char	UTF8;	/* typically 8 bits */
+typedef unsigned char	Boolean; /* 0 or 1 */
+
+/* Some fundamental constants */
+#define UNI_REPLACEMENT_CHAR (UTF32)0x0000FFFD
+#define UNI_MAX_BMP (UTF32)0x0000FFFF
+#define UNI_MAX_UTF16 (UTF32)0x0010FFFF
+#define UNI_MAX_UTF32 (UTF32)0x7FFFFFFF
+#define UNI_MAX_LEGAL_UTF32 (UTF32)0x0010FFFF
+
+typedef enum {
+	conversionOK, 		/* conversion successful */
+	sourceExhausted,	/* partial character in source, but hit end */
+	targetExhausted,	/* insuff. room in target for conversion */
+	sourceIllegal		/* source sequence is illegal/malformed */
+} ConversionResult;
+
+typedef enum {
+	strictConversion = 0,
+	lenientConversion
+} ConversionFlags;
+
+/* This is for C++ and does no harm in C */
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+ConversionResult ConvertUTF8toUTF16 (const UTF8** sourceStart, const UTF8* sourceEnd,
+                                     UTF16** targetStart, UTF16* targetEnd, ConversionFlags flags);
+
+ConversionResult ConvertUTF16toUTF8 (const UTF16** sourceStart, const UTF16* sourceEnd,
+                                     UTF8** targetStart, UTF8* targetEnd, ConversionFlags flags);
+
+ConversionResult ConvertUTF8toUTF32 (const UTF8** sourceStart, const UTF8* sourceEnd,
+                                     UTF32** targetStart, UTF32* targetEnd, ConversionFlags flags);
+
+ConversionResult ConvertUTF32toUTF8 (const UTF32** sourceStart, const UTF32* sourceEnd,
+                                     UTF8** targetStart, UTF8* targetEnd, ConversionFlags flags);
+
+ConversionResult ConvertUTF16toUTF32 (const UTF16** sourceStart, const UTF16* sourceEnd,
+                                      UTF32** targetStart, UTF32* targetEnd, ConversionFlags flags);
+
+ConversionResult ConvertUTF32toUTF16 (const UTF32** sourceStart, const UTF32* sourceEnd,
+                                      UTF16** targetStart, UTF16* targetEnd, ConversionFlags flags);
+
+Boolean isLegalUTF8Sequence(const UTF8 *source, const UTF8 *sourceEnd);
+
+#ifdef __cplusplus
+}
+#endif
+
+/* --------------------------------------------------------------------- */