http://web.archive.org/web/20041122041550/http:/www.unicode.org:80/Public/PROGRAMS/CVTUTF/HEADPROGRAMS/CVTUTF

6 files changed, 521 insertions, 338 deletions

diff --git a/.metadata.txt b/.metadata.txt
index 04a8f5d..65edd80 100644
--- a/.metadata.txt
+++ b/.metadata.txt
@@ -1,5 +1,7 @@
-CVTUTF7.C               2001-08-23 23:56
-CVTUTF7.H               2001-08-23 23:56
-ConvertUTF.c            2001-09-26 17:39
-ConvertUTF.h            2001-09-26 17:39
-harness.c               2001-09-26 17:39
+CVTUTF7.C               2004-11-02 15:08
+CVTUTF7.H               2004-11-02 15:08
+ConvertUTF.c            2004-11-02 15:08
+ConvertUTF.h            2004-11-02 15:08
+ExpectedOutput.txt      2004-11-02 15:08
+harness.c               2004-11-02 15:08
+readme.txt              2004-11-02 15:08
diff --git a/ConvertUTF.c b/ConvertUTF.c
index 23834c4..9b3deeb 100644
--- a/ConvertUTF.c
+++ b/ConvertUTF.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2001 Unicode, Inc.
+ * Copyright 2001-2004 Unicode, Inc.
  * 
  * Disclaimer
  * 
@@ -23,10 +23,16 @@
 /* ---------------------------------------------------------------------
 
     Conversions between UTF32, UTF-16, and UTF-8. Source code file.
-	Author: Mark E. Davis, 1994.
-	Rev History: Rick McGowan, fixes & updates May 2001.
-	Sept 2001: fixed const & error conditions per
-		mods suggested by S. Parent & A. Lillich.
+    Author: Mark E. Davis, 1994.
+    Rev History: Rick McGowan, fixes & updates May 2001.
+    Sept 2001: fixed const & error conditions per
+	mods suggested by S. Parent & A. Lillich.
+    June 2002: Tim Dodd added detection and handling of incomplete
+	source sequences, enhanced error detection, added casts
+	to eliminate compiler warnings.
+    July 2003: slight mods to back out aggressive FFFE detection.
+    Jan 2004: updated switches in from-UTF8 conversions.
+    Oct 2004: updated to use UNI_MAX_LEGAL_UTF32 in UTF-32 conversions.
 
     See the header file "ConvertUTF.h" for complete documentation.
 
@@ -38,106 +44,122 @@
 #include <stdio.h>
 #endif
 
-static const int halfShift	= 10; /* used for shifting by 10 bits */
+static const int halfShift  = 10; /* used for shifting by 10 bits */
 
-static const UTF32 halfBase	= 0x0010000UL;
-static const UTF32 halfMask	= 0x3FFUL;
+static const UTF32 halfBase = 0x0010000UL;
+static const UTF32 halfMask = 0x3FFUL;
 
-#define UNI_SUR_HIGH_START	(UTF32)0xD800
-#define UNI_SUR_HIGH_END	(UTF32)0xDBFF
-#define UNI_SUR_LOW_START	(UTF32)0xDC00
-#define UNI_SUR_LOW_END		(UTF32)0xDFFF
-#define false			0
-#define true			1
+#define UNI_SUR_HIGH_START  (UTF32)0xD800
+#define UNI_SUR_HIGH_END    (UTF32)0xDBFF
+#define UNI_SUR_LOW_START   (UTF32)0xDC00
+#define UNI_SUR_LOW_END     (UTF32)0xDFFF
+#define false	   0
+#define true	    1
 
 /* --------------------------------------------------------------------- */
 
 ConversionResult ConvertUTF32toUTF16 (
-		const UTF32** sourceStart, const UTF32* sourceEnd, 
-		UTF16** targetStart, UTF16* targetEnd, ConversionFlags flags) {
-	ConversionResult result = conversionOK;
-	const UTF32* source = *sourceStart;
-	UTF16* target = *targetStart;
-	while (source < sourceEnd) {
-		UTF32 ch;
-		if (target >= targetEnd) {
-			result = targetExhausted; break;
-		}
-		ch = *source++;
-		if (ch <= UNI_MAX_BMP) { /* Target is a character <= 0xFFFF */
-			if ((flags == strictConversion) && (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_LOW_END)) {
-				--source; /* return to the illegal value itself */
-				result = sourceIllegal;
-				break;
-			} else {
-			    *target++ = ch;	/* normal case */
-			}
-		} else if (ch > UNI_MAX_UTF16) {
-			if (flags == strictConversion) {
-				result = sourceIllegal;
-			} else {
-				*target++ = UNI_REPLACEMENT_CHAR;
-			}
+	const UTF32** sourceStart, const UTF32* sourceEnd, 
+	UTF16** targetStart, UTF16* targetEnd, ConversionFlags flags) {
+    ConversionResult result = conversionOK;
+    const UTF32* source = *sourceStart;
+    UTF16* target = *targetStart;
+    while (source < sourceEnd) {
+	UTF32 ch;
+	if (target >= targetEnd) {
+	    result = targetExhausted; break;
+	}
+	ch = *source++;
+	if (ch <= UNI_MAX_BMP) { /* Target is a character <= 0xFFFF */
+	    /* UTF-16 surrogate values are illegal in UTF-32; 0xffff or 0xfffe are both reserved values */
+	    if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_LOW_END) {
+		if (flags == strictConversion) {
+		    --source; /* return to the illegal value itself */
+		    result = sourceIllegal;
+		    break;
 		} else {
-			/* target is a character in range 0xFFFF - 0x10FFFF. */
-			if (target + 1 >= targetEnd) {
-				--source; /* Back up source pointer! */
-				result = targetExhausted; break;
-			}
-			ch -= halfBase;
-			*target++ = (ch >> halfShift) + UNI_SUR_HIGH_START;
-			*target++ = (ch & halfMask) + UNI_SUR_LOW_START;
+		    *target++ = UNI_REPLACEMENT_CHAR;
 		}
+	    } else {
+		*target++ = (UTF16)ch; /* normal case */
+	    }
+	} else if (ch > UNI_MAX_LEGAL_UTF32) {
+	    if (flags == strictConversion) {
+		result = sourceIllegal;
+	    } else {
+		*target++ = UNI_REPLACEMENT_CHAR;
+	    }
+	} else {
+	    /* target is a character in range 0xFFFF - 0x10FFFF. */
+	    if (target + 1 >= targetEnd) {
+		--source; /* Back up source pointer! */
+		result = targetExhausted; break;
+	    }
+	    ch -= halfBase;
+	    *target++ = (UTF16)((ch >> halfShift) + UNI_SUR_HIGH_START);
+	    *target++ = (UTF16)((ch & halfMask) + UNI_SUR_LOW_START);
 	}
-	*sourceStart = source;
-	*targetStart = target;
-	return result;
+    }
+    *sourceStart = source;
+    *targetStart = target;
+    return result;
 }
 
 /* --------------------------------------------------------------------- */
 
 ConversionResult ConvertUTF16toUTF32 (
-		const UTF16** sourceStart, const UTF16* sourceEnd, 
-		UTF32** targetStart, UTF32* targetEnd, ConversionFlags flags) {
-	ConversionResult result = conversionOK;
-	const UTF16* source = *sourceStart;
-	UTF32* target = *targetStart;
-	UTF32 ch, ch2;
-	while (source < sourceEnd) {
-		const UTF16* oldSource = source; /*  In case we have to back up because of target overflow. */
-		ch = *source++;
-		if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_HIGH_END && source < sourceEnd) {
-			ch2 = *source;
-			if (ch2 >= UNI_SUR_LOW_START && ch2 <= UNI_SUR_LOW_END) {
-				ch = ((ch - UNI_SUR_HIGH_START) << halfShift)
-					+ (ch2 - UNI_SUR_LOW_START) + halfBase;
-				++source;
-			} else if (flags == strictConversion) { /* it's an unpaired high surrogate */
-				--source; /* return to the illegal value itself */
-				result = sourceIllegal;
-				break;
-			}
-		} else if ((flags == strictConversion) && (ch >= UNI_SUR_LOW_START && ch <= UNI_SUR_LOW_END)) {
-			/* an unpaired low surrogate */
-			--source; /* return to the illegal value itself */
-			result = sourceIllegal;
-			break;
-		}
-		if (target >= targetEnd) {
-			source = oldSource; /* Back up source pointer! */
-			result = targetExhausted; break;
+	const UTF16** sourceStart, const UTF16* sourceEnd, 
+	UTF32** targetStart, UTF32* targetEnd, ConversionFlags flags) {
+    ConversionResult result = conversionOK;
+    const UTF16* source = *sourceStart;
+    UTF32* target = *targetStart;
+    UTF32 ch, ch2;
+    while (source < sourceEnd) {
+	const UTF16* oldSource = source; /*  In case we have to back up because of target overflow. */
+	ch = *source++;
+	/* If we have a surrogate pair, convert to UTF32 first. */
+	if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_HIGH_END) {
+	    /* If the 16 bits following the high surrogate are in the source buffer... */
+	    if (source < sourceEnd) {
+		ch2 = *source;
+		/* If it's a low surrogate, convert to UTF32. */
+		if (ch2 >= UNI_SUR_LOW_START && ch2 <= UNI_SUR_LOW_END) {
+		    ch = ((ch - UNI_SUR_HIGH_START) << halfShift)
+			+ (ch2 - UNI_SUR_LOW_START) + halfBase;
+		    ++source;
+		} else if (flags == strictConversion) { /* it's an unpaired high surrogate */
+		    --source; /* return to the illegal value itself */
+		    result = sourceIllegal;
+		    break;
 		}
-		*target++ = ch;
+	    } else { /* We don't have the 16 bits following the high surrogate. */
+		--source; /* return to the high surrogate */
+		result = sourceExhausted;
+		break;
+	    }
+	} else if (flags == strictConversion) {
+	    /* UTF-16 surrogate values are illegal in UTF-32 */
+	    if (ch >= UNI_SUR_LOW_START && ch <= UNI_SUR_LOW_END) {
+		--source; /* return to the illegal value itself */
+		result = sourceIllegal;
+		break;
+	    }
+	}
+	if (target >= targetEnd) {
+	    source = oldSource; /* Back up source pointer! */
+	    result = targetExhausted; break;
 	}
-	*sourceStart = source;
-	*targetStart = target;
+	*target++ = ch;
+    }
+    *sourceStart = source;
+    *targetStart = target;
 #ifdef CVTUTF_DEBUG
 if (result == sourceIllegal) {
     fprintf(stderr, "ConvertUTF16toUTF32 illegal seq 0x%04x,%04x\n", ch, ch2);
     fflush(stderr);
 }
 #endif
-	return result;
+    return result;
 }
 
 /* --------------------------------------------------------------------- */
@@ -145,16 +167,19 @@ if (result == sourceIllegal) {
 /*
  * Index into the table below with the first byte of a UTF-8 sequence to
  * get the number of trailing bytes that are supposed to follow it.
+ * Note that *legal* UTF-8 values can't have 4 or 5-bytes. The table is
+ * left as-is for anyone who may want to do such conversion, which was
+ * allowed in earlier algorithms.
  */
 static const char trailingBytesForUTF8[256] = {
-	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-	0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
-	1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
-	2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 3,3,3,3,3,3,3,3,4,4,4,4,5,5,5,5
+    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+    0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+    1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
+    2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 3,3,3,3,3,3,3,3,4,4,4,4,5,5,5,5
 };
 
 /*
@@ -163,13 +188,14 @@ static const char trailingBytesForUTF8[256] = {
  * in a UTF-8 sequence.
  */
 static const UTF32 offsetsFromUTF8[6] = { 0x00000000UL, 0x00003080UL, 0x000E2080UL, 
-					 0x03C82080UL, 0xFA082080UL, 0x82082080UL };
+		     0x03C82080UL, 0xFA082080UL, 0x82082080UL };
 
 /*
  * Once the bits are split out into bytes of UTF-8, this is a mask OR-ed
  * into the first byte, depending on how many bytes follow.  There are
  * as many entries in this table as there are UTF-8 sequence types.
- * (I.e., one byte sequence, two byte... six byte sequence.)
+ * (I.e., one byte sequence, two byte... etc.). Remember that sequencs
+ * for *legal* UTF-8 will be 4 or fewer bytes total.
  */
 static const UTF8 firstByteMark[7] = { 0x00, 0x00, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC };
 
@@ -186,60 +212,71 @@ static const UTF8 firstByteMark[7] = { 0x00, 0x00, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC
 /* --------------------------------------------------------------------- */
 
 ConversionResult ConvertUTF16toUTF8 (
-		const UTF16** sourceStart, const UTF16* sourceEnd, 
-		UTF8** targetStart, UTF8* targetEnd, ConversionFlags flags) {
-	ConversionResult result = conversionOK;
-	const UTF16* source = *sourceStart;
-	UTF8* target = *targetStart;
-	while (source < sourceEnd) {
-		UTF32 ch;
-		unsigned short bytesToWrite = 0;
-		const UTF32 byteMask = 0xBF;
-		const UTF32 byteMark = 0x80; 
-		const UTF16* oldSource = source; /* In case we have to back up because of target overflow. */
-		ch = *source++;
-		/* If we have a surrogate pair, convert to UTF32 first. */
-		if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_HIGH_END && source < sourceEnd) {
-			UTF32 ch2 = *source;
-			if (ch2 >= UNI_SUR_LOW_START && ch2 <= UNI_SUR_LOW_END) {
-				ch = ((ch - UNI_SUR_HIGH_START) << halfShift)
-					+ (ch2 - UNI_SUR_LOW_START) + halfBase;
-				++source;
-			} else if (flags == strictConversion) { /* it's an unpaired high surrogate */
-				--source; /* return to the illegal value itself */
-				result = sourceIllegal;
-				break;
-			}
-		} else if ((flags == strictConversion) && (ch >= UNI_SUR_LOW_START && ch <= UNI_SUR_LOW_END)) {
-			--source; /* return to the illegal value itself */
-			result = sourceIllegal;
-			break;
-		}
-		/* Figure out how many bytes the result will require */
-		if (ch < (UTF32)0x80) {			bytesToWrite = 1;
-		} else if (ch < (UTF32)0x800) {		bytesToWrite = 2;
-		} else if (ch < (UTF32)0x10000) {	bytesToWrite = 3;
-		} else if (ch < (UTF32)0x200000) {	bytesToWrite = 4;
-		} else {				bytesToWrite = 2;
-							ch = UNI_REPLACEMENT_CHAR;
+	const UTF16** sourceStart, const UTF16* sourceEnd, 
+	UTF8** targetStart, UTF8* targetEnd, ConversionFlags flags) {
+    ConversionResult result = conversionOK;
+    const UTF16* source = *sourceStart;
+    UTF8* target = *targetStart;
+    while (source < sourceEnd) {
+	UTF32 ch;
+	unsigned short bytesToWrite = 0;
+	const UTF32 byteMask = 0xBF;
+	const UTF32 byteMark = 0x80; 
+	const UTF16* oldSource = source; /* In case we have to back up because of target overflow. */
+	ch = *source++;
+	/* If we have a surrogate pair, convert to UTF32 first. */
+	if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_HIGH_END) {
+	    /* If the 16 bits following the high surrogate are in the source buffer... */
+	    if (source < sourceEnd) {
+		UTF32 ch2 = *source;
+		/* If it's a low surrogate, convert to UTF32. */
+		if (ch2 >= UNI_SUR_LOW_START && ch2 <= UNI_SUR_LOW_END) {
+		    ch = ((ch - UNI_SUR_HIGH_START) << halfShift)
+			+ (ch2 - UNI_SUR_LOW_START) + halfBase;
+		    ++source;
+		} else if (flags == strictConversion) { /* it's an unpaired high surrogate */
+		    --source; /* return to the illegal value itself */
+		    result = sourceIllegal;
+		    break;
 		}
+	    } else { /* We don't have the 16 bits following the high surrogate. */
+		--source; /* return to the high surrogate */
+		result = sourceExhausted;
+		break;
+	    }
+	} else if (flags == strictConversion) {
+	    /* UTF-16 surrogate values are illegal in UTF-32 */
+	    if (ch >= UNI_SUR_LOW_START && ch <= UNI_SUR_LOW_END) {
+		--source; /* return to the illegal value itself */
+		result = sourceIllegal;
+		break;
+	    }
+	}
+	/* Figure out how many bytes the result will require */
+	if (ch < (UTF32)0x80) {	     bytesToWrite = 1;
+	} else if (ch < (UTF32)0x800) {     bytesToWrite = 2;
+	} else if (ch < (UTF32)0x10000) {   bytesToWrite = 3;
+	} else if (ch < (UTF32)0x110000) {  bytesToWrite = 4;
+	} else {			    bytesToWrite = 3;
+					    ch = UNI_REPLACEMENT_CHAR;
+	}
 
-		target += bytesToWrite;
-		if (target > targetEnd) {
-			source = oldSource; /* Back up source pointer! */
-			target -= bytesToWrite; result = targetExhausted; break;
-		}
-		switch (bytesToWrite) {	/* note: everything falls through. */
-			case 4:	*--target = (ch | byteMark) & byteMask; ch >>= 6;
-			case 3:	*--target = (ch | byteMark) & byteMask; ch >>= 6;
-			case 2:	*--target = (ch | byteMark) & byteMask; ch >>= 6;
-			case 1:	*--target =  ch | firstByteMark[bytesToWrite];
-		}
-		target += bytesToWrite;
+	target += bytesToWrite;
+	if (target > targetEnd) {
+	    source = oldSource; /* Back up source pointer! */
+	    target -= bytesToWrite; result = targetExhausted; break;
+	}
+	switch (bytesToWrite) { /* note: everything falls through. */
+	    case 4: *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6;
+	    case 3: *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6;
+	    case 2: *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6;
+	    case 1: *--target =  (UTF8)(ch | firstByteMark[bytesToWrite]);
 	}
-	*sourceStart = source;
-	*targetStart = target;
-	return result;
+	target += bytesToWrite;
+    }
+    *sourceStart = source;
+    *targetStart = target;
+    return result;
 }
 
 /* --------------------------------------------------------------------- */
@@ -248,7 +285,7 @@ ConversionResult ConvertUTF16toUTF8 (
  * Utility routine to tell whether a sequence of bytes is legal UTF-8.
  * This must be called with the length pre-determined by the first byte.
  * If not calling this from ConvertUTF8to*, then the length can be set by:
- *	length = trailingBytesForUTF8[*source]+1;
+ *  length = trailingBytesForUTF8[*source]+1;
  * and the sequence is illegal right away if there aren't that many bytes
  * available.
  * If presented with a length > 4, this returns false.  The Unicode
@@ -256,25 +293,28 @@ ConversionResult ConvertUTF16toUTF8 (
  */
 
 static Boolean isLegalUTF8(const UTF8 *source, int length) {
-	UTF8 a;
-	const UTF8 *srcptr = source+length;
-	switch (length) {
-	default: return false;
-		/* Everything else falls through when "true"... */
-	case 4: if ((a = (*--srcptr)) < 0x80 || a > 0xBF) return false;
-	case 3: if ((a = (*--srcptr)) < 0x80 || a > 0xBF) return false;
-	case 2: if ((a = (*--srcptr)) > 0xBF) return false;
-		switch (*source) {
-		    /* no fall-through in this inner switch */
-		    case 0xE0: if (a < 0xA0) return false; break;
-		    case 0xF0: if (a < 0x90) return false; break;
-		    case 0xF4: if (a > 0x8F) return false; break;
-		    default:  if (a < 0x80) return false;
-		}
-    	case 1: if (*source >= 0x80 && *source < 0xC2) return false;
-		if (*source > 0xF4) return false;
+    UTF8 a;
+    const UTF8 *srcptr = source+length;
+    switch (length) {
+    default: return false;
+	/* Everything else falls through when "true"... */
+    case 4: if ((a = (*--srcptr)) < 0x80 || a > 0xBF) return false;
+    case 3: if ((a = (*--srcptr)) < 0x80 || a > 0xBF) return false;
+    case 2: if ((a = (*--srcptr)) > 0xBF) return false;
+
+	switch (*source) {
+	    /* no fall-through in this inner switch */
+	    case 0xE0: if (a < 0xA0) return false; break;
+	    case 0xED: if (a > 0x9F) return false; break;
+	    case 0xF0: if (a < 0x90) return false; break;
+	    case 0xF4: if (a > 0x8F) return false; break;
+	    default:   if (a < 0x80) return false;
 	}
-	return true;
+
+    case 1: if (*source >= 0x80 && *source < 0xC2) return false;
+    }
+    if (*source > 0xF4) return false;
+    return true;
 }
 
 /* --------------------------------------------------------------------- */
@@ -284,190 +324,216 @@ static Boolean isLegalUTF8(const UTF8 *source, int length) {
  * This is not used here; it's just exported.
  */
 Boolean isLegalUTF8Sequence(const UTF8 *source, const UTF8 *sourceEnd) {
-	int length = trailingBytesForUTF8[*source]+1;
-	if (source+length > sourceEnd) {
-	    return false;
-	}
-	return isLegalUTF8(source, length);
+    int length = trailingBytesForUTF8[*source]+1;
+    if (source+length > sourceEnd) {
+	return false;
+    }
+    return isLegalUTF8(source, length);
 }
 
 /* --------------------------------------------------------------------- */
 
 ConversionResult ConvertUTF8toUTF16 (
-		const UTF8** sourceStart, const UTF8* sourceEnd, 
-		UTF16** targetStart, UTF16* targetEnd, ConversionFlags flags) {
-	ConversionResult result = conversionOK;
-	const UTF8* source = *sourceStart;
-	UTF16* target = *targetStart;
-	while (source < sourceEnd) {
-		UTF32 ch = 0;
-		unsigned short extraBytesToRead = trailingBytesForUTF8[*source];
-		if (source + extraBytesToRead >= sourceEnd) {
-			result = sourceExhausted; break;
-		}
-		/* Do this check whether lenient or strict */
-		if (! isLegalUTF8(source, extraBytesToRead+1)) {
-			result = sourceIllegal;
-			break;
-		}
-		/*
-		 * The cases all fall through. See "Note A" below.
-		 */
-		switch (extraBytesToRead) {
-			case 3:	ch += *source++; ch <<= 6;
-			case 2:	ch += *source++; ch <<= 6;
-			case 1:	ch += *source++; ch <<= 6;
-			case 0:	ch += *source++;
-		}
-		ch -= offsetsFromUTF8[extraBytesToRead];
+	const UTF8** sourceStart, const UTF8* sourceEnd, 
+	UTF16** targetStart, UTF16* targetEnd, ConversionFlags flags) {
+    ConversionResult result = conversionOK;
+    const UTF8* source = *sourceStart;
+    UTF16* target = *targetStart;
+    while (source < sourceEnd) {
+	UTF32 ch = 0;
+	unsigned short extraBytesToRead = trailingBytesForUTF8[*source];
+	if (source + extraBytesToRead >= sourceEnd) {
+	    result = sourceExhausted; break;
+	}
+	/* Do this check whether lenient or strict */
+	if (! isLegalUTF8(source, extraBytesToRead+1)) {
+	    result = sourceIllegal;
+	    break;
+	}
+	/*
+	 * The cases all fall through. See "Note A" below.
+	 */
+	switch (extraBytesToRead) {
+	    case 5: ch += *source++; ch <<= 6; /* remember, illegal UTF-8 */
+	    case 4: ch += *source++; ch <<= 6; /* remember, illegal UTF-8 */
+	    case 3: ch += *source++; ch <<= 6;
+	    case 2: ch += *source++; ch <<= 6;
+	    case 1: ch += *source++; ch <<= 6;
+	    case 0: ch += *source++;
+	}
+	ch -= offsetsFromUTF8[extraBytesToRead];
 
-		if (target >= targetEnd) {
-			source -= (extraBytesToRead+1);	/* Back up source pointer! */
-			result = targetExhausted; break;
-		}
-		if (ch <= UNI_MAX_BMP) { /* Target is a character <= 0xFFFF */
-			if ((flags == strictConversion) && (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_LOW_END)) {
-				source -= (extraBytesToRead+1); /* return to the illegal value itself */
-				result = sourceIllegal;
-				break;
-			} else {
-			    *target++ = ch;	/* normal case */
-			}
-		} else if (ch > UNI_MAX_UTF16) {
-			if (flags == strictConversion) {
-				result = sourceIllegal;
-				source -= (extraBytesToRead+1); /* return to the start */
-				break; /* Bail out; shouldn't continue */
-			} else {
-				*target++ = UNI_REPLACEMENT_CHAR;
-			}
+	if (target >= targetEnd) {
+	    source -= (extraBytesToRead+1); /* Back up source pointer! */
+	    result = targetExhausted; break;
+	}
+	if (ch <= UNI_MAX_BMP) { /* Target is a character <= 0xFFFF */
+	    /* UTF-16 surrogate values are illegal in UTF-32 */
+	    if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_LOW_END) {
+		if (flags == strictConversion) {
+		    source -= (extraBytesToRead+1); /* return to the illegal value itself */
+		    result = sourceIllegal;
+		    break;
 		} else {
-			/* target is a character in range 0xFFFF - 0x10FFFF. */
-			if (target + 1 >= targetEnd) {
-				source -= (extraBytesToRead+1);	/* Back up source pointer! */
-				result = targetExhausted; break;
-			}
-			ch -= halfBase;
-			*target++ = (ch >> halfShift) + UNI_SUR_HIGH_START;
-			*target++ = (ch & halfMask) + UNI_SUR_LOW_START;
+		    *target++ = UNI_REPLACEMENT_CHAR;
 		}
+	    } else {
+		*target++ = (UTF16)ch; /* normal case */
+	    }
+	} else if (ch > UNI_MAX_UTF16) {
+	    if (flags == strictConversion) {
+		result = sourceIllegal;
+		source -= (extraBytesToRead+1); /* return to the start */
+		break; /* Bail out; shouldn't continue */
+	    } else {
+		*target++ = UNI_REPLACEMENT_CHAR;
+	    }
+	} else {
+	    /* target is a character in range 0xFFFF - 0x10FFFF. */
+	    if (target + 1 >= targetEnd) {
+		source -= (extraBytesToRead+1); /* Back up source pointer! */
+		result = targetExhausted; break;
+	    }
+	    ch -= halfBase;
+	    *target++ = (UTF16)((ch >> halfShift) + UNI_SUR_HIGH_START);
+	    *target++ = (UTF16)((ch & halfMask) + UNI_SUR_LOW_START);
 	}
-	*sourceStart = source;
-	*targetStart = target;
-	return result;
+    }
+    *sourceStart = source;
+    *targetStart = target;
+    return result;
 }
 
 /* --------------------------------------------------------------------- */
 
 ConversionResult ConvertUTF32toUTF8 (
-		const UTF32** sourceStart, const UTF32* sourceEnd, 
-		UTF8** targetStart, UTF8* targetEnd, ConversionFlags flags) {
-	ConversionResult result = conversionOK;
-	const UTF32* source = *sourceStart;
-	UTF8* target = *targetStart;
-	while (source < sourceEnd) {
-		UTF32 ch;
-		unsigned short bytesToWrite = 0;
-		const UTF32 byteMask = 0xBF;
-		const UTF32 byteMark = 0x80; 
-		ch = *source++;
-		/* surrogates of any stripe are not legal UTF32 characters */
-		if (flags == strictConversion ) {
-			if ((ch >= UNI_SUR_HIGH_START) && (ch <= UNI_SUR_LOW_END)) {
-				--source; /* return to the illegal value itself */
-				result = sourceIllegal;
-				break;
-			}
-		}
-		/* Figure out how many bytes the result will require */
-		if (ch < (UTF32)0x80) {			bytesToWrite = 1;
-		} else if (ch < (UTF32)0x800) {		bytesToWrite = 2;
-		} else if (ch < (UTF32)0x10000) {	bytesToWrite = 3;
-		} else if (ch < (UTF32)0x200000) {	bytesToWrite = 4;
-		} else {				bytesToWrite = 2;
-							ch = UNI_REPLACEMENT_CHAR;
-		}
-		
-		target += bytesToWrite;
-		if (target > targetEnd) {
-			--source; /* Back up source pointer! */
-			target -= bytesToWrite; result = targetExhausted; break;
-		}
-		switch (bytesToWrite) {	/* note: everything falls through. */
-			case 4:	*--target = (ch | byteMark) & byteMask; ch >>= 6;
-			case 3:	*--target = (ch | byteMark) & byteMask; ch >>= 6;
-			case 2:	*--target = (ch | byteMark) & byteMask; ch >>= 6;
-			case 1:	*--target =  ch | firstByteMark[bytesToWrite];
-		}
-		target += bytesToWrite;
+	const UTF32** sourceStart, const UTF32* sourceEnd, 
+	UTF8** targetStart, UTF8* targetEnd, ConversionFlags flags) {
+    ConversionResult result = conversionOK;
+    const UTF32* source = *sourceStart;
+    UTF8* target = *targetStart;
+    while (source < sourceEnd) {
+	UTF32 ch;
+	unsigned short bytesToWrite = 0;
+	const UTF32 byteMask = 0xBF;
+	const UTF32 byteMark = 0x80; 
+	ch = *source++;
+	if (flags == strictConversion ) {
+	    /* UTF-16 surrogate values are illegal in UTF-32 */
+	    if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_LOW_END) {
+		--source; /* return to the illegal value itself */
+		result = sourceIllegal;
+		break;
+	    }
+	}
+	/*
+	 * Figure out how many bytes the result will require. Turn any
+	 * illegally large UTF32 things (> Plane 17) into replacement chars.
+	 */
+	if (ch < (UTF32)0x80) {	     bytesToWrite = 1;
+	} else if (ch < (UTF32)0x800) {     bytesToWrite = 2;
+	} else if (ch < (UTF32)0x10000) {   bytesToWrite = 3;
+	} else if (ch <= UNI_MAX_LEGAL_UTF32) {  bytesToWrite = 4;
+	} else {			    bytesToWrite = 3;
+					    ch = UNI_REPLACEMENT_CHAR;
+					    result = sourceIllegal;
+	}
+	
+	target += bytesToWrite;
+	if (target > targetEnd) {
+	    --source; /* Back up source pointer! */
+	    target -= bytesToWrite; result = targetExhausted; break;
 	}
-	*sourceStart = source;
-	*targetStart = target;
-	return result;
+	switch (bytesToWrite) { /* note: everything falls through. */
+	    case 4: *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6;
+	    case 3: *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6;
+	    case 2: *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6;
+	    case 1: *--target = (UTF8) (ch | firstByteMark[bytesToWrite]);
+	}
+	target += bytesToWrite;
+    }
+    *sourceStart = source;
+    *targetStart = target;
+    return result;
 }
 
 /* --------------------------------------------------------------------- */
 
 ConversionResult ConvertUTF8toUTF32 (
-		const UTF8** sourceStart, const UTF8* sourceEnd, 
-		UTF32** targetStart, UTF32* targetEnd, ConversionFlags flags) {
-	ConversionResult result = conversionOK;
-	const UTF8* source = *sourceStart;
-	UTF32* target = *targetStart;
-	while (source < sourceEnd) {
-		UTF32 ch = 0;
-		unsigned short extraBytesToRead = trailingBytesForUTF8[*source];
-		if (source + extraBytesToRead >= sourceEnd) {
-			result = sourceExhausted; break;
-		}
-		/* Do this check whether lenient or strict */
-		if (! isLegalUTF8(source, extraBytesToRead+1)) {
-			result = sourceIllegal;
-			break;
-		}
-		/*
-		 * The cases all fall through. See "Note A" below.
-		 */
-		switch (extraBytesToRead) {
-			case 3:	ch += *source++; ch <<= 6;
-			case 2:	ch += *source++; ch <<= 6;
-			case 1:	ch += *source++; ch <<= 6;
-			case 0:	ch += *source++;
-		}
-		ch -= offsetsFromUTF8[extraBytesToRead];
+	const UTF8** sourceStart, const UTF8* sourceEnd, 
+	UTF32** targetStart, UTF32* targetEnd, ConversionFlags flags) {
+    ConversionResult result = conversionOK;
+    const UTF8* source = *sourceStart;
+    UTF32* target = *targetStart;
+    while (source < sourceEnd) {
+	UTF32 ch = 0;
+	unsigned short extraBytesToRead = trailingBytesForUTF8[*source];
+	if (source + extraBytesToRead >= sourceEnd) {
+	    result = sourceExhausted; break;
+	}
+	/* Do this check whether lenient or strict */
+	if (! isLegalUTF8(source, extraBytesToRead+1)) {
+	    result = sourceIllegal;
+	    break;
+	}
+	/*
+	 * The cases all fall through. See "Note A" below.
+	 */
+	switch (extraBytesToRead) {
+	    case 5: ch += *source++; ch <<= 6;
+	    case 4: ch += *source++; ch <<= 6;
+	    case 3: ch += *source++; ch <<= 6;
+	    case 2: ch += *source++; ch <<= 6;
+	    case 1: ch += *source++; ch <<= 6;
+	    case 0: ch += *source++;
+	}
+	ch -= offsetsFromUTF8[extraBytesToRead];
 
-		if (target >= targetEnd) {
-			source -= (extraBytesToRead+1);	/* Back up the source pointer! */
-			result = targetExhausted; break;
-		}
-		if (ch <= UNI_MAX_UTF32) {
-			*target++ = ch;
-		} else { /* i.e., ch > UNI_MAX_UTF32 */
-			*target++ = UNI_REPLACEMENT_CHAR;
+	if (target >= targetEnd) {
+	    source -= (extraBytesToRead+1); /* Back up the source pointer! */
+	    result = targetExhausted; break;
+	}
+	if (ch <= UNI_MAX_LEGAL_UTF32) {
+	    /*
+	     * UTF-16 surrogate values are illegal in UTF-32, and anything
+	     * over Plane 17 (> 0x10FFFF) is illegal.
+	     */
+	    if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_LOW_END) {
+		if (flags == strictConversion) {
+		    source -= (extraBytesToRead+1); /* return to the illegal value itself */
+		    result = sourceIllegal;
+		    break;
+		} else {
+		    *target++ = UNI_REPLACEMENT_CHAR;
 		}
+	    } else {
+		*target++ = ch;
+	    }
+	} else { /* i.e., ch > UNI_MAX_LEGAL_UTF32 */
+	    result = sourceIllegal;
+	    *target++ = UNI_REPLACEMENT_CHAR;
 	}
-	*sourceStart = source;
-	*targetStart = target;
-	return result;
+    }
+    *sourceStart = source;
+    *targetStart = target;
+    return result;
 }
 
 /* ---------------------------------------------------------------------
 
-	Note A.
-	The fall-through switches in UTF-8 reading code save a
-	temp variable, some decrements & conditionals.  The switches
-	are equivalent to the following loop:
-		{
-			int tmpBytesToRead = extraBytesToRead+1;
-			do {
-				ch += *source++;
-				--tmpBytesToRead;
-				if (tmpBytesToRead) ch <<= 6;
-			} while (tmpBytesToRead > 0);
-		}
-	In UTF-8 writing code, the switches on "bytesToWrite" are
-	similarly unrolled loops.
+    Note A.
+    The fall-through switches in UTF-8 reading code save a
+    temp variable, some decrements & conditionals.  The switches
+    are equivalent to the following loop:
+	{
+	    int tmpBytesToRead = extraBytesToRead+1;
+	    do {
+		ch += *source++;
+		--tmpBytesToRead;
+		if (tmpBytesToRead) ch <<= 6;
+	    } while (tmpBytesToRead > 0);
+	}
+    In UTF-8 writing code, the switches on "bytesToWrite" are
+    similarly unrolled loops.
 
    --------------------------------------------------------------------- */
-
-
diff --git a/ConvertUTF.h b/ConvertUTF.h
index 429ab40..e264915 100644
--- a/ConvertUTF.h
+++ b/ConvertUTF.h
@@ -1,5 +1,5 @@
 /*
- * Copyright 2001 Unicode, Inc.
+ * Copyright 2001-2004 Unicode, Inc.
  * 
  * Disclaimer
  * 
@@ -97,6 +97,7 @@ typedef unsigned char	Boolean; /* 0 or 1 */
 #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 */
diff --git a/ExpectedOutput.txt b/ExpectedOutput.txt
new file mode 100644
index 0000000..e09d844
--- /dev/null
+++ b/ExpectedOutput.txt
@@ -0,0 +1,21 @@
+Three tests of round-trip conversions will be performed.
+One test of illegal UTF-32 will be peroformed.
+Two illegal result messages are expected; one in test 02A; one in test 03A.
+These are for tests of Surrogate conversion.
+
+Begin Test01
+******** Test01 succeeded without error. ********
+
+Begin Test02
+Test02A for 55296, input 0000d800, output 0000,0000, result 3
+!!! Test02A: note expected illegal result for 0x0000D800
+******** Test02 succeeded without error. ********
+
+Begin Test03
+sourceIllegal	Test03A for 55296 (0xd800); output ; result 3
+!!! Test03A: note expected illegal result for 0x0000D800
+******** Test03 succeeded without error. ********
+
+Begin Test04
+******** Test04 succeeded without error. ********
+
diff --git a/harness.c b/harness.c
index b3dd500..25b3e9e 100644
--- a/harness.c
+++ b/harness.c
@@ -1,5 +1,5 @@
 /*
- * Copyright 2001 Unicode, Inc.
+ * Copyright 2001-2004 Unicode, Inc.
  * 
  * Disclaimer
  * 
@@ -31,6 +31,11 @@
  *		$	gcc -g harness.c -o harness
  *
  * Rev History: Rick McGowan, new file April 2001.
+ * Sept 19, 2002: Corrected error on line 234:  utf16_buf[2] becomes utf16_result[2]
+ * 	per report from Iain Murray.
+ * July 3, 2003: Updated printout message.
+ * Oct 19, 2004: Updated isLegalUTF8 test data and corrected switch statements to catch
+ *	illegal surrogate use in UTF-8, per report from Frank Tang.
  *
  */
 
@@ -51,7 +56,9 @@
 	00-7F				  0000-  007F
 	C2-DF	80-BF			  0080-  07FF
 	E0	A0-BF	80-BF		  0800-  0FFF
-	E1-EF	80-BF	80-BF		  1000-  FFFF
+	E1-EC   80-BF   80-BF             1000-  CFFF
+	ED      80-9F   80-BF             D000-  D7FF
+	EE-EF   80-BF   80-BF             E000-  FFFF
 	F0	90-BF	80-BF	80-BF	 10000- 3FFFF
 	F1-F3	80-BF	80-BF	80-BF	 40000- FFFFF
 	F4	80-8F	80-BF	80-BF	100000-10FFFF
@@ -85,9 +92,16 @@ struct utf8_test utf8_testData[] = {
     { 0,	2,	{ 0xC0, 0xAF, 0x00, 0x00, 0x00 }},	/* 15 */
     { 0,	3,	{ 0xE0, 0x9F, 0x80, 0x00, 0x00 }},	/* 16 */
     { 0,	4,	{ 0xF0, 0x93, 0xB2, 0xC1, 0x00 }},	/* 17 */
-/* for all > 17 use "short" buffer lengths to detect over-run */
+
+    { 1,	3,	{ 0xED, 0x9F, 0xBF, 0x00, 0x00 }},	/* 18 */
+    { 1,	3,	{ 0xEE, 0x80, 0x80, 0x00, 0x00 }},	/* 19 */
+    { 0,	3,	{ 0xED, 0xA0, 0x80, 0x00, 0x00 }},	/* 20 */
+    { 0,	3,	{ 0xED, 0xBF, 0xBF, 0x00, 0x00 }},	/* 21 */
+
+/* for all > 21 use "short" buffer lengths to detect over-run */
     { 0,	4,	{ 0xF0, 0x93, 0xB2, 0xC3, 0x00 }},	/* 18 use short buflen */
-    { 0,	0,	{ 0x00, 0x00, 0x00, 0x00, 0x00 }}
+    { 0,	0,	{ 0x00, 0x00, 0x00, 0x00, 0x00 }},
+
 };
 
 int test01() {
@@ -100,8 +114,8 @@ int test01() {
 	for (i = 0; utf8_testData[i].utf8_len; i++) {
 		wantVal1 = wantVal2 = utf8_testData[i].utf8_legal;
 		gotVal1 = isLegalUTF8(&(utf8_testData[i].utf8_seq[0]), utf8_testData[i].utf8_len);
-		/* use truncated length for tests over 17 */
-		if (i <= 17) { len2 = 4; } else { len2 = utf8_testData[i].utf8_len-1; wantVal2 = 0; }
+		/* use truncated length for tests over 21 */
+		if (i <= 21) { len2 = 4; } else { len2 = utf8_testData[i].utf8_len-1; wantVal2 = 0; }
 		gotVal2 = isLegalUTF8Sequence(&(utf8_testData[i].utf8_seq[0]), &(utf8_testData[i].utf8_seq[0])+len2);
 		if ((gotVal1 != wantVal1) || (gotVal2 != wantVal2)) {
 			printf("Test01 error: seq %d is %d & %d (should be %d & %d) for bytes (%x,%x,%x,%x,%x,) & len %d\n",
@@ -195,7 +209,6 @@ int test02() {
 		case sourceIllegal: printf("sourceIllegal\t"); break;
 		}
 		if (result != conversionOK) {
-
 			printf("Test02B for %d (0x%x), input %04x,%04x; output %s; result %d\n",
 				i, utf32_buf[0], utf16_buf[0], utf16_buf[1], utf8_buf, result);
 			if ((i != UNI_SUR_LOW_START) && (i != UNI_SUR_HIGH_START)) {
@@ -230,7 +243,7 @@ int test02() {
 		/*
 		 * Test UTF8 -> UTF16, with legality check on.
 		 */
-		result = ConvertUTF8toUTF16((const UTF8 **) &utf8SourceStart, &(utf8_buf[trailingBytesForUTF8[utf8_buf[0]]+1]), &utf16TargetStart, &(utf16_buf[2]), strictConversion);
+		result = ConvertUTF8toUTF16((const UTF8 **) &utf8SourceStart, &(utf8_buf[trailingBytesForUTF8[utf8_buf[0]]+1]), &utf16TargetStart, &(utf16_result[2]), strictConversion);
 		switch (result) {
 		default: fprintf(stderr, "Test02C fatal error: result %d for input %08x\n", result, utf32_buf[0]); exit(1);
 		case conversionOK: break;
@@ -281,8 +294,6 @@ int test02() {
 			printf("Test02E for %d: utf32 input %08x; trip output %08x (utf_16buf is %04x,%04x)\n", i, utf32_buf[0], utf32_result[0], utf16_buf[0], utf16_buf[1]);
 			return 0;
 		}
-
-
 	}
 	return 1;
 }
@@ -380,11 +391,48 @@ int test03() {
 	return 1;
 }
 
+/* ---------------------------------------------------------------------
+	test04 - Test an illegal UTF-32 value > 10FFFF conversion to UTF-8.
+	Expect it will be turned into UNI_REPLACEMENT_CHAR.
+
+   --------------------------------------------------------------------- */
+
+int test04() {
+	int i, n;
+	ConversionResult result;
+	UTF32 utf32_buf[2];
+	UTF8 utf8_buf[8];
+	UTF32 *utf32SourceStart, *utf32TargetStart;
+	UTF8 *utf8SourceStart, *utf8TargetStart;
+
+	printf("Begin Test04\n"); fflush(stdout);
+
+	i = 0x10FFFF + 21; /* an arbitrary value > legal */
+
+	utf32_buf[0] = i; utf32_buf[1] = 0;
+	for (n = 0; n < 8; n++) utf8_buf[n] = 0;
+
+	utf32SourceStart = utf32_buf;
+	utf8TargetStart = utf8_buf;
+
+	/*
+	 * Test UTF32 -> UTF8, with legality check on.
+	 */
+	result = ConvertUTF32toUTF8((const UTF32 **) &utf32SourceStart, &(utf32_buf[1]), & utf8TargetStart, &(utf8_buf[7]), strictConversion);
+	if (result != sourceIllegal) {
+		fprintf(stderr, "Test04A fatal error: result %d for input %08x\n", result, utf32_buf[0]); exit(1);
+	}
+
+	return 1;
+}
+
 /* --------------------------------------------------------------------- */
 
 main() {
 	printf("Three tests of round-trip conversions will be performed.\n");
-	printf("Two illegal result messages are expected; one in test 02A; one in test 03A .\n\n");
+	printf("One test of illegal UTF-32 will be peroformed.\n");
+	printf("Two illegal result messages are expected; one in test 02A; one in test 03A.\n");
+	printf("These are for tests of Surrogate conversion.\n\n");
 	fflush(stdout);
 	if (test01()) {	printf("******** Test01 succeeded without error. ********\n\n"); }
 	else { printf("-------- Test01 failed. --------\n\n"); }
@@ -392,4 +440,6 @@ main() {
 	else { printf("-------- Test02 failed. --------\n\n"); }
 	if (test03()) { printf("******** Test03 succeeded without error. ********\n\n"); }
 	else { printf("-------- Test03 failed. --------\n\n"); }
+	if (test04()) { printf("******** Test04 succeeded without error. ********\n\n"); }
+	else { printf("-------- Test04 failed. --------\n\n"); }
 }
diff --git a/readme.txt b/readme.txt
new file mode 100644
index 0000000..b9f17fb
--- /dev/null
+++ b/readme.txt
@@ -0,0 +1,43 @@
+
+The accompanying C source code file "ConvertUTF.c" and the associated header
+file "ConvertUTF.h" provide for conversion between various transformation
+formats of Unicode characters.  The following conversions are supported:
+
+	UTF-32 to UTF-16
+	UTF-32 to UTF-8
+	UTF-16 to UTF-32
+	UTF-16 to UTF-8
+	UTF-8 to UTF-16
+	UTF-8 to UTF-32
+
+In addition, there is a test harness which runs various tests.
+
+The files "CVTUTF7.C" and "CVTUTF7.H" are for archival and historical purposes
+only. They have not been updated to Unicode 3.0 or later and should be
+considered obsolescent. "CVTUTF7.C" contains two functions that can convert
+between UCS2 (i.e., the BMP characters only) and UTF-7. Surrogates are
+not supported, the code has not been tested, and should be considered
+unsuitable for general purpose use.
+
+Please submit any bug reports about these programs here:
+
+	http://www.unicode.org/unicode/reporting.html
+
+Version 1.0: initial version.
+
+Version 1.1: corrected some minor problems; added stricter checks.
+
+Version 1.2: corrected switch statements associated with "extraBytesToRead"
+	in 4 & 5 byte cases, in functions for conversion from UTF8.
+	Note: formally, the 4 & 5 byte cases are illegal in the latest
+	UTF8, but the table and this code has always catered for those,
+	cases since at one time they were legal.
+
+Version 1.3: Updated UTF-8 legality check;
+	updated to use UNI_MAX_LEGAL_UTF32 in UTF-32 conversions
+	Updated UTF-8 legality tests in harness.c
+ 
+
+Last update: October 19, 2004
+
+