Move ICU headers from public/{common,i18n} to source/{common,i18n}

public/common/unicode/ustring.h

Index: public/common/unicode/ustring.h
diff --git a/public/common/unicode/ustring.h b/public/common/unicode/ustring.h
deleted file mode 100644
index 388bc74a4093a6cfb52f3a034d298764dbe28e3a..0000000000000000000000000000000000000000
--- a/public/common/unicode/ustring.h
+++ /dev/null
@@ -1,1696 +0,0 @@
-/*
-**********************************************************************
-*   Copyright (C) 1998-2010, International Business Machines
-*   Corporation and others.  All Rights Reserved.
-**********************************************************************
-*
-* File ustring.h
-*
-* Modification History:
-*
-*   Date        Name        Description
-*   12/07/98    bertrand    Creation.
-******************************************************************************
-*/
-
-#ifndef USTRING_H
-#define USTRING_H
-
-#include "unicode/utypes.h"
-#include "unicode/putil.h"
-#include "unicode/uiter.h"
-
-/** Simple declaration for u_strToTitle() to avoid including unicode/ubrk.h. @stable ICU 2.1*/
-#ifndef UBRK_TYPEDEF_UBREAK_ITERATOR
-#   define UBRK_TYPEDEF_UBREAK_ITERATOR
-    typedef struct UBreakIterator UBreakIterator;
-#endif
-
-/**
- * \file
- * \brief C API: Unicode string handling functions
- *
- * These C API functions provide general Unicode string handling.
- *
- * Some functions are equivalent in name, signature, and behavior to the ANSI C <string.h>
- * functions. (For example, they do not check for bad arguments like NULL string pointers.)
- * In some cases, only the thread-safe variant of such a function is implemented here
- * (see u_strtok_r()).
- *
- * Other functions provide more Unicode-specific functionality like locale-specific
- * upper/lower-casing and string comparison in code point order.
- *
- * ICU uses 16-bit Unicode (UTF-16) in the form of arrays of UChar code units.
- * UTF-16 encodes each Unicode code point with either one or two UChar code units.
- * (This is the default form of Unicode, and a forward-compatible extension of the original,
- * fixed-width form that was known as UCS-2. UTF-16 superseded UCS-2 with Unicode 2.0
- * in 1996.)
- *
- * Some APIs accept a 32-bit UChar32 value for a single code point.
- *
- * ICU also handles 16-bit Unicode text with unpaired surrogates.
- * Such text is not well-formed UTF-16.
- * Code-point-related functions treat unpaired surrogates as surrogate code points,
- * i.e., as separate units.
- *
- * Although UTF-16 is a variable-width encoding form (like some legacy multi-byte encodings),
- * it is much more efficient even for random access because the code unit values
- * for single-unit characters vs. lead units vs. trail units are completely disjoint.
- * This means that it is easy to determine character (code point) boundaries from
- * random offsets in the string.
- *
- * Unicode (UTF-16) string processing is optimized for the single-unit case.
- * Although it is important to support supplementary characters
- * (which use pairs of lead/trail code units called "surrogates"),
- * their occurrence is rare. Almost all characters in modern use require only
- * a single UChar code unit (i.e., their code point values are <=0xffff).
- *
- * For more details see the User Guide Strings chapter (http://icu-project.org/userguide/strings.html).
- * For a discussion of the handling of unpaired surrogates see also
- * Jitterbug 2145 and its icu mailing list proposal on 2002-sep-18.
- */
-
-/**
- * \defgroup ustring_ustrlen String Length
- * \ingroup ustring_strlen
- */
-/*@{*/
-/**
- * Determine the length of an array of UChar.
- *
- * @param s The array of UChars, NULL (U+0000) terminated.
- * @return The number of UChars in <code>chars</code>, minus the terminator.
- * @stable ICU 2.0
- */
-U_STABLE int32_t U_EXPORT2
-u_strlen(const UChar *s);
-/*@}*/
-
-/**
- * Count Unicode code points in the length UChar code units of the string.
- * A code point may occupy either one or two UChar code units.
- * Counting code points involves reading all code units.
- *
- * This functions is basically the inverse of the U16_FWD_N() macro (see utf.h).
- *
- * @param s The input string.
- * @param length The number of UChar code units to be checked, or -1 to count all
- *               code points before the first NUL (U+0000).
- * @return The number of code points in the specified code units.
- * @stable ICU 2.0
- */
-U_STABLE int32_t U_EXPORT2
-u_countChar32(const UChar *s, int32_t length);
-
-/**
- * Check if the string contains more Unicode code points than a certain number.
- * This is more efficient than counting all code points in the entire string
- * and comparing that number with a threshold.
- * This function may not need to scan the string at all if the length is known
- * (not -1 for NUL-termination) and falls within a certain range, and
- * never needs to count more than 'number+1' code points.
- * Logically equivalent to (u_countChar32(s, length)>number).
- * A Unicode code point may occupy either one or two UChar code units.
- *
- * @param s The input string.
- * @param length The length of the string, or -1 if it is NUL-terminated.
- * @param number The number of code points in the string is compared against
- *               the 'number' parameter.
- * @return Boolean value for whether the string contains more Unicode code points
- *         than 'number'. Same as (u_countChar32(s, length)>number).
- * @stable ICU 2.4
- */
-U_STABLE UBool U_EXPORT2
-u_strHasMoreChar32Than(const UChar *s, int32_t length, int32_t number);
-
-/**
- * Concatenate two ustrings.  Appends a copy of <code>src</code>,
- * including the null terminator, to <code>dst</code>. The initial copied
- * character from <code>src</code> overwrites the null terminator in <code>dst</code>.
- *
- * @param dst The destination string.
- * @param src The source string.
- * @return A pointer to <code>dst</code>.
- * @stable ICU 2.0
- */
-U_STABLE UChar* U_EXPORT2
-u_strcat(UChar     *dst, 
-    const UChar     *src);
-
-/**
- * Concatenate two ustrings.  
- * Appends at most <code>n</code> characters from <code>src</code> to <code>dst</code>.
- * Adds a terminating NUL.
- * If src is too long, then only <code>n-1</code> characters will be copied
- * before the terminating NUL.
- * If <code>n&lt;=0</code> then dst is not modified.
- *
- * @param dst The destination string.
- * @param src The source string.
- * @param n The maximum number of characters to append.
- * @return A pointer to <code>dst</code>.
- * @stable ICU 2.0
- */
-U_STABLE UChar* U_EXPORT2
-u_strncat(UChar     *dst, 
-     const UChar     *src, 
-     int32_t     n);
-
-/**
- * Find the first occurrence of a substring in a string.
- * The substring is found at code point boundaries.
- * That means that if the substring begins with
- * a trail surrogate or ends with a lead surrogate,
- * then it is found only if these surrogates stand alone in the text.
- * Otherwise, the substring edge units would be matched against
- * halves of surrogate pairs.
- *
- * @param s The string to search (NUL-terminated).
- * @param substring The substring to find (NUL-terminated).
- * @return A pointer to the first occurrence of <code>substring</code> in <code>s</code>,
- *         or <code>s</code> itself if the <code>substring</code> is empty,
- *         or <code>NULL</code> if <code>substring</code> is not in <code>s</code>.
- * @stable ICU 2.0
- *
- * @see u_strrstr
- * @see u_strFindFirst
- * @see u_strFindLast
- */
-U_STABLE UChar * U_EXPORT2
-u_strstr(const UChar *s, const UChar *substring);
-
-/**
- * Find the first occurrence of a substring in a string.
- * The substring is found at code point boundaries.
- * That means that if the substring begins with
- * a trail surrogate or ends with a lead surrogate,
- * then it is found only if these surrogates stand alone in the text.
- * Otherwise, the substring edge units would be matched against
- * halves of surrogate pairs.
- *
- * @param s The string to search.
- * @param length The length of s (number of UChars), or -1 if it is NUL-terminated.
- * @param substring The substring to find (NUL-terminated).
- * @param subLength The length of substring (number of UChars), or -1 if it is NUL-terminated.
- * @return A pointer to the first occurrence of <code>substring</code> in <code>s</code>,
- *         or <code>s</code> itself if the <code>substring</code> is empty,
- *         or <code>NULL</code> if <code>substring</code> is not in <code>s</code>.
- * @stable ICU 2.4
- *
- * @see u_strstr
- * @see u_strFindLast
- */
-U_STABLE UChar * U_EXPORT2
-u_strFindFirst(const UChar *s, int32_t length, const UChar *substring, int32_t subLength);
-
-/**
- * Find the first occurrence of a BMP code point in a string.
- * A surrogate code point is found only if its match in the text is not
- * part of a surrogate pair.
- * A NUL character is found at the string terminator.
- *
- * @param s The string to search (NUL-terminated).
- * @param c The BMP code point to find.
- * @return A pointer to the first occurrence of <code>c</code> in <code>s</code>
- *         or <code>NULL</code> if <code>c</code> is not in <code>s</code>.
- * @stable ICU 2.0
- *
- * @see u_strchr32
- * @see u_memchr
- * @see u_strstr
- * @see u_strFindFirst
- */
-U_STABLE UChar * U_EXPORT2
-u_strchr(const UChar *s, UChar c);
-
-/**
- * Find the first occurrence of a code point in a string.
- * A surrogate code point is found only if its match in the text is not
- * part of a surrogate pair.
- * A NUL character is found at the string terminator.
- *
- * @param s The string to search (NUL-terminated).
- * @param c The code point to find.
- * @return A pointer to the first occurrence of <code>c</code> in <code>s</code>
- *         or <code>NULL</code> if <code>c</code> is not in <code>s</code>.
- * @stable ICU 2.0
- *
- * @see u_strchr
- * @see u_memchr32
- * @see u_strstr
- * @see u_strFindFirst
- */
-U_STABLE UChar * U_EXPORT2
-u_strchr32(const UChar *s, UChar32 c);
-
-/**
- * Find the last occurrence of a substring in a string.
- * The substring is found at code point boundaries.
- * That means that if the substring begins with
- * a trail surrogate or ends with a lead surrogate,
- * then it is found only if these surrogates stand alone in the text.
- * Otherwise, the substring edge units would be matched against
- * halves of surrogate pairs.
- *
- * @param s The string to search (NUL-terminated).
- * @param substring The substring to find (NUL-terminated).
- * @return A pointer to the last occurrence of <code>substring</code> in <code>s</code>,
- *         or <code>s</code> itself if the <code>substring</code> is empty,
- *         or <code>NULL</code> if <code>substring</code> is not in <code>s</code>.
- * @stable ICU 2.4
- *
- * @see u_strstr
- * @see u_strFindFirst
- * @see u_strFindLast
- */
-U_STABLE UChar * U_EXPORT2
-u_strrstr(const UChar *s, const UChar *substring);
-
-/**
- * Find the last occurrence of a substring in a string.
- * The substring is found at code point boundaries.
- * That means that if the substring begins with
- * a trail surrogate or ends with a lead surrogate,
- * then it is found only if these surrogates stand alone in the text.
- * Otherwise, the substring edge units would be matched against
- * halves of surrogate pairs.
- *
- * @param s The string to search.
- * @param length The length of s (number of UChars), or -1 if it is NUL-terminated.
- * @param substring The substring to find (NUL-terminated).
- * @param subLength The length of substring (number of UChars), or -1 if it is NUL-terminated.
- * @return A pointer to the last occurrence of <code>substring</code> in <code>s</code>,
- *         or <code>s</code> itself if the <code>substring</code> is empty,
- *         or <code>NULL</code> if <code>substring</code> is not in <code>s</code>.
- * @stable ICU 2.4
- *
- * @see u_strstr
- * @see u_strFindLast
- */
-U_STABLE UChar * U_EXPORT2
-u_strFindLast(const UChar *s, int32_t length, const UChar *substring, int32_t subLength);
-
-/**
- * Find the last occurrence of a BMP code point in a string.
- * A surrogate code point is found only if its match in the text is not
- * part of a surrogate pair.
- * A NUL character is found at the string terminator.
- *
- * @param s The string to search (NUL-terminated).
- * @param c The BMP code point to find.
- * @return A pointer to the last occurrence of <code>c</code> in <code>s</code>
- *         or <code>NULL</code> if <code>c</code> is not in <code>s</code>.
- * @stable ICU 2.4
- *
- * @see u_strrchr32
- * @see u_memrchr
- * @see u_strrstr
- * @see u_strFindLast
- */
-U_STABLE UChar * U_EXPORT2
-u_strrchr(const UChar *s, UChar c);
-
-/**
- * Find the last occurrence of a code point in a string.
- * A surrogate code point is found only if its match in the text is not
- * part of a surrogate pair.
- * A NUL character is found at the string terminator.
- *
- * @param s The string to search (NUL-terminated).
- * @param c The code point to find.
- * @return A pointer to the last occurrence of <code>c</code> in <code>s</code>
- *         or <code>NULL</code> if <code>c</code> is not in <code>s</code>.
- * @stable ICU 2.4
- *
- * @see u_strrchr
- * @see u_memchr32
- * @see u_strrstr
- * @see u_strFindLast
- */
-U_STABLE UChar * U_EXPORT2
-u_strrchr32(const UChar *s, UChar32 c);
-
-/**
- * Locates the first occurrence in the string <code>string</code> of any of the characters
- * in the string <code>matchSet</code>.
- * Works just like C's strpbrk but with Unicode.
- *
- * @param string The string in which to search, NUL-terminated.
- * @param matchSet A NUL-terminated string defining a set of code points
- *                 for which to search in the text string.
- * @return A pointer to the  character in <code>string</code> that matches one of the
- *         characters in <code>matchSet</code>, or NULL if no such character is found.
- * @stable ICU 2.0
- */
-U_STABLE UChar * U_EXPORT2
-u_strpbrk(const UChar *string, const UChar *matchSet);
-
-/**
- * Returns the number of consecutive characters in <code>string</code>,
- * beginning with the first, that do not occur somewhere in <code>matchSet</code>.
- * Works just like C's strcspn but with Unicode.
- *
- * @param string The string in which to search, NUL-terminated.
- * @param matchSet A NUL-terminated string defining a set of code points
- *                 for which to search in the text string.
- * @return The number of initial characters in <code>string</code> that do not
- *         occur in <code>matchSet</code>.
- * @see u_strspn
- * @stable ICU 2.0
- */
-U_STABLE int32_t U_EXPORT2
-u_strcspn(const UChar *string, const UChar *matchSet);
-
-/**
- * Returns the number of consecutive characters in <code>string</code>,
- * beginning with the first, that occur somewhere in <code>matchSet</code>.
- * Works just like C's strspn but with Unicode.
- *
- * @param string The string in which to search, NUL-terminated.
- * @param matchSet A NUL-terminated string defining a set of code points
- *                 for which to search in the text string.
- * @return The number of initial characters in <code>string</code> that do
- *         occur in <code>matchSet</code>.
- * @see u_strcspn
- * @stable ICU 2.0
- */
-U_STABLE int32_t U_EXPORT2
-u_strspn(const UChar *string, const UChar *matchSet);
-
-/**
- * The string tokenizer API allows an application to break a string into
- * tokens. Unlike strtok(), the saveState (the current pointer within the
- * original string) is maintained in saveState. In the first call, the
- * argument src is a pointer to the string. In subsequent calls to
- * return successive tokens of that string, src must be specified as
- * NULL. The value saveState is set by this function to maintain the
- * function's position within the string, and on each subsequent call
- * you must give this argument the same variable. This function does
- * handle surrogate pairs. This function is similar to the strtok_r()
- * the POSIX Threads Extension (1003.1c-1995) version.
- *
- * @param src String containing token(s). This string will be modified.
- *            After the first call to u_strtok_r(), this argument must
- *            be NULL to get to the next token.
- * @param delim Set of delimiter characters (Unicode code points).
- * @param saveState The current pointer within the original string,
- *              which is set by this function. The saveState
- *              parameter should the address of a local variable of type
- *              UChar *. (i.e. defined "Uhar *myLocalSaveState" and use
- *              &myLocalSaveState for this parameter).
- * @return A pointer to the next token found in src, or NULL
- *         when there are no more tokens.
- * @stable ICU 2.0
- */
-U_STABLE UChar * U_EXPORT2
-u_strtok_r(UChar    *src, 
-     const UChar    *delim,
-           UChar   **saveState);
-
-/**
- * Compare two Unicode strings for bitwise equality (code unit order).
- *
- * @param s1 A string to compare.
- * @param s2 A string to compare.
- * @return 0 if <code>s1</code> and <code>s2</code> are bitwise equal; a negative
- * value if <code>s1</code> is bitwise less than <code>s2,</code>; a positive
- * value if <code>s1</code> is bitwise greater than <code>s2</code>.
- * @stable ICU 2.0
- */
-U_STABLE int32_t  U_EXPORT2
-u_strcmp(const UChar     *s1, 
-         const UChar     *s2);
-
-/**
- * Compare two Unicode strings in code point order.
- * See u_strCompare for details.
- *
- * @param s1 A string to compare.
- * @param s2 A string to compare.
- * @return a negative/zero/positive integer corresponding to whether
- * the first string is less than/equal to/greater than the second one
- * in code point order
- * @stable ICU 2.0
- */
-U_STABLE int32_t U_EXPORT2
-u_strcmpCodePointOrder(const UChar *s1, const UChar *s2);
-
-/**
- * Compare two Unicode strings (binary order).
- *
- * The comparison can be done in code unit order or in code point order.
- * They differ only in UTF-16 when
- * comparing supplementary code points (U+10000..U+10ffff)
- * to BMP code points near the end of the BMP (i.e., U+e000..U+ffff).
- * In code unit order, high BMP code points sort after supplementary code points
- * because they are stored as pairs of surrogates which are at U+d800..U+dfff.
- *
- * This functions works with strings of different explicitly specified lengths
- * unlike the ANSI C-like u_strcmp() and u_memcmp() etc.
- * NUL-terminated strings are possible with length arguments of -1.
- *
- * @param s1 First source string.
- * @param length1 Length of first source string, or -1 if NUL-terminated.
- *
- * @param s2 Second source string.
- * @param length2 Length of second source string, or -1 if NUL-terminated.
- *
- * @param codePointOrder Choose between code unit order (FALSE)
- *                       and code point order (TRUE).
- *
- * @return <0 or 0 or >0 as usual for string comparisons
- *
- * @stable ICU 2.2
- */
-U_STABLE int32_t U_EXPORT2
-u_strCompare(const UChar *s1, int32_t length1,
-             const UChar *s2, int32_t length2,
-             UBool codePointOrder);
-
-/**
- * Compare two Unicode strings (binary order)
- * as presented by UCharIterator objects.
- * Works otherwise just like u_strCompare().
- *
- * Both iterators are reset to their start positions.
- * When the function returns, it is undefined where the iterators
- * have stopped.
- *
- * @param iter1 First source string iterator.
- * @param iter2 Second source string iterator.
- * @param codePointOrder Choose between code unit order (FALSE)
- *                       and code point order (TRUE).
- *
- * @return <0 or 0 or >0 as usual for string comparisons
- *
- * @see u_strCompare
- *
- * @stable ICU 2.6
- */
-U_STABLE int32_t U_EXPORT2
-u_strCompareIter(UCharIterator *iter1, UCharIterator *iter2, UBool codePointOrder);
-
-#ifndef U_COMPARE_CODE_POINT_ORDER
-/* see also unistr.h and unorm.h */
-/**
- * Option bit for u_strCaseCompare, u_strcasecmp, unorm_compare, etc:
- * Compare strings in code point order instead of code unit order.
- * @stable ICU 2.2
- */
-#define U_COMPARE_CODE_POINT_ORDER  0x8000
-#endif
-
-/**
- * Compare two strings case-insensitively using full case folding.
- * This is equivalent to
- *   u_strCompare(u_strFoldCase(s1, options),
- *                u_strFoldCase(s2, options),
- *                (options&U_COMPARE_CODE_POINT_ORDER)!=0).
- *
- * The comparison can be done in UTF-16 code unit order or in code point order.
- * They differ only when comparing supplementary code points (U+10000..U+10ffff)
- * to BMP code points near the end of the BMP (i.e., U+e000..U+ffff).
- * In code unit order, high BMP code points sort after supplementary code points
- * because they are stored as pairs of surrogates which are at U+d800..U+dfff.
- *
- * This functions works with strings of different explicitly specified lengths
- * unlike the ANSI C-like u_strcmp() and u_memcmp() etc.
- * NUL-terminated strings are possible with length arguments of -1.
- *
- * @param s1 First source string.
- * @param length1 Length of first source string, or -1 if NUL-terminated.
- *
- * @param s2 Second source string.
- * @param length2 Length of second source string, or -1 if NUL-terminated.
- *
- * @param options A bit set of options:
- *   - U_FOLD_CASE_DEFAULT or 0 is used for default options:
- *     Comparison in code unit order with default case folding.
- *
- *   - U_COMPARE_CODE_POINT_ORDER
- *     Set to choose code point order instead of code unit order
- *     (see u_strCompare for details).
- *
- *   - U_FOLD_CASE_EXCLUDE_SPECIAL_I
- *
- * @param pErrorCode Must be a valid pointer to an error code value,
- *                  which must not indicate a failure before the function call.
- *
- * @return <0 or 0 or >0 as usual for string comparisons
- *
- * @stable ICU 2.2
- */
-U_STABLE int32_t U_EXPORT2
-u_strCaseCompare(const UChar *s1, int32_t length1,
-                 const UChar *s2, int32_t length2,
-                 uint32_t options,
-                 UErrorCode *pErrorCode);
-
-/**
- * Compare two ustrings for bitwise equality. 
- * Compares at most <code>n</code> characters.
- *
- * @param ucs1 A string to compare.
- * @param ucs2 A string to compare.
- * @param n The maximum number of characters to compare.
- * @return 0 if <code>s1</code> and <code>s2</code> are bitwise equal; a negative
- * value if <code>s1</code> is bitwise less than <code>s2</code>; a positive
- * value if <code>s1</code> is bitwise greater than <code>s2</code>.
- * @stable ICU 2.0
- */
-U_STABLE int32_t U_EXPORT2
-u_strncmp(const UChar     *ucs1, 
-     const UChar     *ucs2, 
-     int32_t     n);
-
-/**
- * Compare two Unicode strings in code point order.
- * This is different in UTF-16 from u_strncmp() if supplementary characters are present.
- * For details, see u_strCompare().
- *
- * @param s1 A string to compare.
- * @param s2 A string to compare.
- * @param n The maximum number of characters to compare.
- * @return a negative/zero/positive integer corresponding to whether
- * the first string is less than/equal to/greater than the second one
- * in code point order
- * @stable ICU 2.0
- */
-U_STABLE int32_t U_EXPORT2
-u_strncmpCodePointOrder(const UChar *s1, const UChar *s2, int32_t n);
-
-/**
- * Compare two strings case-insensitively using full case folding.
- * This is equivalent to u_strcmp(u_strFoldCase(s1, options), u_strFoldCase(s2, options)).
- *
- * @param s1 A string to compare.
- * @param s2 A string to compare.
- * @param options A bit set of options:
- *   - U_FOLD_CASE_DEFAULT or 0 is used for default options:
- *     Comparison in code unit order with default case folding.
- *
- *   - U_COMPARE_CODE_POINT_ORDER
- *     Set to choose code point order instead of code unit order
- *     (see u_strCompare for details).
- *
- *   - U_FOLD_CASE_EXCLUDE_SPECIAL_I
- *
- * @return A negative, zero, or positive integer indicating the comparison result.
- * @stable ICU 2.0
- */
-U_STABLE int32_t U_EXPORT2
-u_strcasecmp(const UChar *s1, const UChar *s2, uint32_t options);
-
-/**
- * Compare two strings case-insensitively using full case folding.
- * This is equivalent to u_strcmp(u_strFoldCase(s1, at most n, options),
- * u_strFoldCase(s2, at most n, options)).
- *
- * @param s1 A string to compare.
- * @param s2 A string to compare.
- * @param n The maximum number of characters each string to case-fold and then compare.
- * @param options A bit set of options:
- *   - U_FOLD_CASE_DEFAULT or 0 is used for default options:
- *     Comparison in code unit order with default case folding.
- *
- *   - U_COMPARE_CODE_POINT_ORDER
- *     Set to choose code point order instead of code unit order
- *     (see u_strCompare for details).
- *
- *   - U_FOLD_CASE_EXCLUDE_SPECIAL_I
- *
- * @return A negative, zero, or positive integer indicating the comparison result.
- * @stable ICU 2.0
- */
-U_STABLE int32_t U_EXPORT2
-u_strncasecmp(const UChar *s1, const UChar *s2, int32_t n, uint32_t options);
-
-/**
- * Compare two strings case-insensitively using full case folding.
- * This is equivalent to u_strcmp(u_strFoldCase(s1, n, options),
- * u_strFoldCase(s2, n, options)).
- *
- * @param s1 A string to compare.
- * @param s2 A string to compare.
- * @param length The number of characters in each string to case-fold and then compare.
- * @param options A bit set of options:
- *   - U_FOLD_CASE_DEFAULT or 0 is used for default options:
- *     Comparison in code unit order with default case folding.
- *
- *   - U_COMPARE_CODE_POINT_ORDER
- *     Set to choose code point order instead of code unit order
- *     (see u_strCompare for details).
- *
- *   - U_FOLD_CASE_EXCLUDE_SPECIAL_I
- *
- * @return A negative, zero, or positive integer indicating the comparison result.
- * @stable ICU 2.0
- */
-U_STABLE int32_t U_EXPORT2
-u_memcasecmp(const UChar *s1, const UChar *s2, int32_t length, uint32_t options);
-
-/**
- * Copy a ustring. Adds a null terminator.
- *
- * @param dst The destination string.
- * @param src The source string.
- * @return A pointer to <code>dst</code>.
- * @stable ICU 2.0
- */
-U_STABLE UChar* U_EXPORT2
-u_strcpy(UChar     *dst, 
-    const UChar     *src);
-
-/**
- * Copy a ustring.
- * Copies at most <code>n</code> characters.  The result will be null terminated
- * if the length of <code>src</code> is less than <code>n</code>.
- *
- * @param dst The destination string.
- * @param src The source string.
- * @param n The maximum number of characters to copy.
- * @return A pointer to <code>dst</code>.
- * @stable ICU 2.0
- */
-U_STABLE UChar* U_EXPORT2
-u_strncpy(UChar     *dst, 
-     const UChar     *src, 
-     int32_t     n);
-
-#if !UCONFIG_NO_CONVERSION
-
-/**
- * Copy a byte string encoded in the default codepage to a ustring.
- * Adds a null terminator.
- * Performs a host byte to UChar conversion
- *
- * @param dst The destination string.
- * @param src The source string.
- * @return A pointer to <code>dst</code>.
- * @stable ICU 2.0
- */
-U_STABLE UChar* U_EXPORT2 u_uastrcpy(UChar *dst,
-               const char *src );
-
-/**
- * Copy a byte string encoded in the default codepage to a ustring.
- * Copies at most <code>n</code> characters.  The result will be null terminated
- * if the length of <code>src</code> is less than <code>n</code>.
- * Performs a host byte to UChar conversion
- *
- * @param dst The destination string.
- * @param src The source string.
- * @param n The maximum number of characters to copy.
- * @return A pointer to <code>dst</code>.
- * @stable ICU 2.0
- */
-U_STABLE UChar* U_EXPORT2 u_uastrncpy(UChar *dst,
-            const char *src,
-            int32_t n);
-
-/**
- * Copy ustring to a byte string encoded in the default codepage.
- * Adds a null terminator.
- * Performs a UChar to host byte conversion
- *
- * @param dst The destination string.
- * @param src The source string.
- * @return A pointer to <code>dst</code>.
- * @stable ICU 2.0
- */
-U_STABLE char* U_EXPORT2 u_austrcpy(char *dst,
-            const UChar *src );
-
-/**
- * Copy ustring to a byte string encoded in the default codepage.
- * Copies at most <code>n</code> characters.  The result will be null terminated
- * if the length of <code>src</code> is less than <code>n</code>.
- * Performs a UChar to host byte conversion
- *
- * @param dst The destination string.
- * @param src The source string.
- * @param n The maximum number of characters to copy.
- * @return A pointer to <code>dst</code>.
- * @stable ICU 2.0
- */
-U_STABLE char* U_EXPORT2 u_austrncpy(char *dst,
-            const UChar *src,
-            int32_t n );
-
-#endif
-
-/**
- * Synonym for memcpy(), but with UChars only.
- * @param dest The destination string
- * @param src The source string
- * @param count The number of characters to copy
- * @return A pointer to <code>dest</code>
- * @stable ICU 2.0
- */
-U_STABLE UChar* U_EXPORT2
-u_memcpy(UChar *dest, const UChar *src, int32_t count);
-
-/**
- * Synonym for memmove(), but with UChars only.
- * @param dest The destination string
- * @param src The source string
- * @param count The number of characters to move
- * @return A pointer to <code>dest</code>
- * @stable ICU 2.0
- */
-U_STABLE UChar* U_EXPORT2
-u_memmove(UChar *dest, const UChar *src, int32_t count);
-
-/**
- * Initialize <code>count</code> characters of <code>dest</code> to <code>c</code>.
- *
- * @param dest The destination string.
- * @param c The character to initialize the string.
- * @param count The maximum number of characters to set.
- * @return A pointer to <code>dest</code>.
- * @stable ICU 2.0
- */
-U_STABLE UChar* U_EXPORT2
-u_memset(UChar *dest, UChar c, int32_t count);
-
-/**
- * Compare the first <code>count</code> UChars of each buffer.
- *
- * @param buf1 The first string to compare.
- * @param buf2 The second string to compare.
- * @param count The maximum number of UChars to compare.
- * @return When buf1 < buf2, a negative number is returned.
- *      When buf1 == buf2, 0 is returned.
- *      When buf1 > buf2, a positive number is returned.
- * @stable ICU 2.0
- */
-U_STABLE int32_t U_EXPORT2
-u_memcmp(const UChar *buf1, const UChar *buf2, int32_t count);
-
-/**
- * Compare two Unicode strings in code point order.
- * This is different in UTF-16 from u_memcmp() if supplementary characters are present.
- * For details, see u_strCompare().
- *
- * @param s1 A string to compare.
- * @param s2 A string to compare.
- * @param count The maximum number of characters to compare.
- * @return a negative/zero/positive integer corresponding to whether
- * the first string is less than/equal to/greater than the second one
- * in code point order
- * @stable ICU 2.0
- */
-U_STABLE int32_t U_EXPORT2
-u_memcmpCodePointOrder(const UChar *s1, const UChar *s2, int32_t count);
-
-/**
- * Find the first occurrence of a BMP code point in a string.
- * A surrogate code point is found only if its match in the text is not
- * part of a surrogate pair.
- * A NUL character is found at the string terminator.
- *
- * @param s The string to search (contains <code>count</code> UChars).
- * @param c The BMP code point to find.
- * @param count The length of the string.
- * @return A pointer to the first occurrence of <code>c</code> in <code>s</code>
- *         or <code>NULL</code> if <code>c</code> is not in <code>s</code>.
- * @stable ICU 2.0
- *
- * @see u_strchr
- * @see u_memchr32
- * @see u_strFindFirst
- */
-U_STABLE UChar* U_EXPORT2
-u_memchr(const UChar *s, UChar c, int32_t count);
-
-/**
- * Find the first occurrence of a code point in a string.
- * A surrogate code point is found only if its match in the text is not
- * part of a surrogate pair.
- * A NUL character is found at the string terminator.
- *
- * @param s The string to search (contains <code>count</code> UChars).
- * @param c The code point to find.
- * @param count The length of the string.
- * @return A pointer to the first occurrence of <code>c</code> in <code>s</code>
- *         or <code>NULL</code> if <code>c</code> is not in <code>s</code>.
- * @stable ICU 2.0
- *
- * @see u_strchr32
- * @see u_memchr
- * @see u_strFindFirst
- */
-U_STABLE UChar* U_EXPORT2
-u_memchr32(const UChar *s, UChar32 c, int32_t count);
-
-/**
- * Find the last occurrence of a BMP code point in a string.
- * A surrogate code point is found only if its match in the text is not
- * part of a surrogate pair.
- * A NUL character is found at the string terminator.
- *
- * @param s The string to search (contains <code>count</code> UChars).
- * @param c The BMP code point to find.
- * @param count The length of the string.
- * @return A pointer to the last occurrence of <code>c</code> in <code>s</code>
- *         or <code>NULL</code> if <code>c</code> is not in <code>s</code>.
- * @stable ICU 2.4
- *
- * @see u_strrchr
- * @see u_memrchr32
- * @see u_strFindLast
- */
-U_STABLE UChar* U_EXPORT2
-u_memrchr(const UChar *s, UChar c, int32_t count);
-
-/**
- * Find the last occurrence of a code point in a string.
- * A surrogate code point is found only if its match in the text is not
- * part of a surrogate pair.
- * A NUL character is found at the string terminator.
- *
- * @param s The string to search (contains <code>count</code> UChars).
- * @param c The code point to find.
- * @param count The length of the string.
- * @return A pointer to the last occurrence of <code>c</code> in <code>s</code>
- *         or <code>NULL</code> if <code>c</code> is not in <code>s</code>.
- * @stable ICU 2.4
- *
- * @see u_strrchr32
- * @see u_memrchr
- * @see u_strFindLast
- */
-U_STABLE UChar* U_EXPORT2
-u_memrchr32(const UChar *s, UChar32 c, int32_t count);
-
-/**
- * Unicode String literals in C.
- * We need one macro to declare a variable for the string
- * and to statically preinitialize it if possible,
- * and a second macro to dynamically intialize such a string variable if necessary.
- *
- * The macros are defined for maximum performance.
- * They work only for strings that contain "invariant characters", i.e.,
- * only latin letters, digits, and some punctuation.
- * See utypes.h for details.
- *
- * A pair of macros for a single string must be used with the same
- * parameters.
- * The string parameter must be a C string literal.
- * The length of the string, not including the terminating
- * <code>NUL</code>, must be specified as a constant.
- * The U_STRING_DECL macro should be invoked exactly once for one
- * such string variable before it is used.
- *
- * Usage:
- * <pre>
- *    U_STRING_DECL(ustringVar1, "Quick-Fox 2", 11);
- *    U_STRING_DECL(ustringVar2, "jumps 5%", 8);
- *    static UBool didInit=FALSE;
- * 
- *    int32_t function() {
- *        if(!didInit) {
- *            U_STRING_INIT(ustringVar1, "Quick-Fox 2", 11);
- *            U_STRING_INIT(ustringVar2, "jumps 5%", 8);
- *            didInit=TRUE;
- *        }
- *        return u_strcmp(ustringVar1, ustringVar2);
- *    }
- * </pre>
- * 
- * Note that the macros will NOT consistently work if their argument is another #define. 
- *  The following will not work on all platforms, don't use it.
- * 
- * <pre>
- *     #define GLUCK "Mr. Gluck"
- *     U_STRING_DECL(var, GLUCK, 9)
- *     U_STRING_INIT(var, GLUCK, 9)
- * </pre>
- * 
- * Instead, use the string literal "Mr. Gluck"  as the argument to both macro
- * calls.
- *
- *
- * @stable ICU 2.0
- */
-#if defined(U_DECLARE_UTF16)
-#   define U_STRING_DECL(var, cs, length) static const UChar var[(length)+1]=U_DECLARE_UTF16(cs)
-    /**@stable ICU 2.0 */
-#   define U_STRING_INIT(var, cs, length)
-#elif U_SIZEOF_WCHAR_T==U_SIZEOF_UCHAR && (U_CHARSET_FAMILY==U_ASCII_FAMILY || (U_SIZEOF_UCHAR == 2 && defined(U_WCHAR_IS_UTF16)))
-#   define U_STRING_DECL(var, cs, length) static const UChar var[(length)+1]=L ## cs
-    /**@stable ICU 2.0 */
-#   define U_STRING_INIT(var, cs, length)
-#elif U_SIZEOF_UCHAR==1 && U_CHARSET_FAMILY==U_ASCII_FAMILY
-#   define U_STRING_DECL(var, cs, length) static const UChar var[(length)+1]=cs
-    /**@stable ICU 2.0 */
-#   define U_STRING_INIT(var, cs, length)
-#else
-#   define U_STRING_DECL(var, cs, length) static UChar var[(length)+1]
-    /**@stable ICU 2.0 */
-#   define U_STRING_INIT(var, cs, length) u_charsToUChars(cs, var, length+1)
-#endif
-
-/**
- * Unescape a string of characters and write the resulting
- * Unicode characters to the destination buffer.  The following escape
- * sequences are recognized:
- *
- * \\uhhhh       4 hex digits; h in [0-9A-Fa-f]
- * \\Uhhhhhhhh   8 hex digits
- * \\xhh         1-2 hex digits
- * \\x{h...}     1-8 hex digits
- * \\ooo         1-3 octal digits; o in [0-7]
- * \\cX          control-X; X is masked with 0x1F
- *
- * as well as the standard ANSI C escapes:
- *
- * \\a => U+0007, \\b => U+0008, \\t => U+0009, \\n => U+000A,
- * \\v => U+000B, \\f => U+000C, \\r => U+000D, \\e => U+001B,
- * \\&quot; => U+0022, \\' => U+0027, \\? => U+003F, \\\\ => U+005C
- *
- * Anything else following a backslash is generically escaped.  For
- * example, "[a\\-z]" returns "[a-z]".
- *
- * If an escape sequence is ill-formed, this method returns an empty
- * string.  An example of an ill-formed sequence is "\\u" followed by
- * fewer than 4 hex digits.
- *
- * The above characters are recognized in the compiler's codepage,
- * that is, they are coded as 'u', '\\', etc.  Characters that are
- * not parts of escape sequences are converted using u_charsToUChars().
- *
- * This function is similar to UnicodeString::unescape() but not
- * identical to it.  The latter takes a source UnicodeString, so it
- * does escape recognition but no conversion.
- *
- * @param src a zero-terminated string of invariant characters
- * @param dest pointer to buffer to receive converted and unescaped
- * text and, if there is room, a zero terminator.  May be NULL for
- * preflighting, in which case no UChars will be written, but the
- * return value will still be valid.  On error, an empty string is
- * stored here (if possible).
- * @param destCapacity the number of UChars that may be written at
- * dest.  Ignored if dest == NULL.
- * @return the length of unescaped string.
- * @see u_unescapeAt
- * @see UnicodeString#unescape()
- * @see UnicodeString#unescapeAt()
- * @stable ICU 2.0
- */
-U_STABLE int32_t U_EXPORT2
-u_unescape(const char *src,
-           UChar *dest, int32_t destCapacity);
-
-U_CDECL_BEGIN
-/**
- * Callback function for u_unescapeAt() that returns a character of
- * the source text given an offset and a context pointer.  The context
- * pointer will be whatever is passed into u_unescapeAt().
- *
- * @param offset pointer to the offset that will be passed to u_unescapeAt().
- * @param context an opaque pointer passed directly into u_unescapeAt()
- * @return the character represented by the escape sequence at
- * offset
- * @see u_unescapeAt
- * @stable ICU 2.0
- */
-typedef UChar (U_CALLCONV *UNESCAPE_CHAR_AT)(int32_t offset, void *context);
-U_CDECL_END
-
-/**
- * Unescape a single sequence. The character at offset-1 is assumed
- * (without checking) to be a backslash.  This method takes a callback
- * pointer to a function that returns the UChar at a given offset.  By
- * varying this callback, ICU functions are able to unescape char*
- * strings, UnicodeString objects, and UFILE pointers.
- *
- * If offset is out of range, or if the escape sequence is ill-formed,
- * (UChar32)0xFFFFFFFF is returned.  See documentation of u_unescape()
- * for a list of recognized sequences.
- *
- * @param charAt callback function that returns a UChar of the source
- * text given an offset and a context pointer.
- * @param offset pointer to the offset that will be passed to charAt.
- * The offset value will be updated upon return to point after the
- * last parsed character of the escape sequence.  On error the offset
- * is unchanged.
- * @param length the number of characters in the source text.  The
- * last character of the source text is considered to be at offset
- * length-1.
- * @param context an opaque pointer passed directly into charAt.
- * @return the character represented by the escape sequence at
- * offset, or (UChar32)0xFFFFFFFF on error.
- * @see u_unescape()
- * @see UnicodeString#unescape()
- * @see UnicodeString#unescapeAt()
- * @stable ICU 2.0
- */
-U_STABLE UChar32 U_EXPORT2
-u_unescapeAt(UNESCAPE_CHAR_AT charAt,
-             int32_t *offset,
-             int32_t length,
-             void *context);
-
-/**
- * Uppercase the characters in a string.
- * Casing is locale-dependent and context-sensitive.
- * The result may be longer or shorter than the original.
- * The source string and the destination buffer are allowed to overlap.
- *
- * @param dest      A buffer for the result string. The result will be zero-terminated if
- *                  the buffer is large enough.
- * @param destCapacity The size of the buffer (number of UChars). If it is 0, then
- *                  dest may be NULL and the function will only return the length of the result
- *                  without writing any of the result string.
- * @param src       The original string
- * @param srcLength The length of the original string. If -1, then src must be zero-terminated.
- * @param locale    The locale to consider, or "" for the root locale or NULL for the default locale.
- * @param pErrorCode Must be a valid pointer to an error code value,
- *                  which must not indicate a failure before the function call.
- * @return The length of the result string. It may be greater than destCapacity. In that case,
- *         only some of the result was written to the destination buffer.
- * @stable ICU 2.0
- */
-U_STABLE int32_t U_EXPORT2
-u_strToUpper(UChar *dest, int32_t destCapacity,
-             const UChar *src, int32_t srcLength,
-             const char *locale,
-             UErrorCode *pErrorCode);
-
-/**
- * Lowercase the characters in a string.
- * Casing is locale-dependent and context-sensitive.
- * The result may be longer or shorter than the original.
- * The source string and the destination buffer are allowed to overlap.
- *
- * @param dest      A buffer for the result string. The result will be zero-terminated if
- *                  the buffer is large enough.
- * @param destCapacity The size of the buffer (number of UChars). If it is 0, then
- *                  dest may be NULL and the function will only return the length of the result
- *                  without writing any of the result string.
- * @param src       The original string
- * @param srcLength The length of the original string. If -1, then src must be zero-terminated.
- * @param locale    The locale to consider, or "" for the root locale or NULL for the default locale.
- * @param pErrorCode Must be a valid pointer to an error code value,
- *                  which must not indicate a failure before the function call.
- * @return The length of the result string. It may be greater than destCapacity. In that case,
- *         only some of the result was written to the destination buffer.
- * @stable ICU 2.0
- */
-U_STABLE int32_t U_EXPORT2
-u_strToLower(UChar *dest, int32_t destCapacity,
-             const UChar *src, int32_t srcLength,
-             const char *locale,
-             UErrorCode *pErrorCode);
-
-#if !UCONFIG_NO_BREAK_ITERATION
-
-/**
- * Titlecase a string.
- * Casing is locale-dependent and context-sensitive.
- * Titlecasing uses a break iterator to find the first characters of words
- * that are to be titlecased. It titlecases those characters and lowercases
- * all others.
- *
- * The titlecase break iterator can be provided to customize for arbitrary
- * styles, using rules and dictionaries beyond the standard iterators.
- * It may be more efficient to always provide an iterator to avoid
- * opening and closing one for each string.
- * The standard titlecase iterator for the root locale implements the
- * algorithm of Unicode TR 21.
- *
- * This function uses only the setText(), first() and next() methods of the
- * provided break iterator.
- *
- * The result may be longer or shorter than the original.
- * The source string and the destination buffer are allowed to overlap.
- *
- * @param dest      A buffer for the result string. The result will be zero-terminated if
- *                  the buffer is large enough.
- * @param destCapacity The size of the buffer (number of UChars). If it is 0, then
- *                  dest may be NULL and the function will only return the length of the result
- *                  without writing any of the result string.
- * @param src       The original string
- * @param srcLength The length of the original string. If -1, then src must be zero-terminated.
- * @param titleIter A break iterator to find the first characters of words
- *                  that are to be titlecased.
- *                  If none is provided (NULL), then a standard titlecase
- *                  break iterator is opened.
- * @param locale    The locale to consider, or "" for the root locale or NULL for the default locale.
- * @param pErrorCode Must be a valid pointer to an error code value,
- *                  which must not indicate a failure before the function call.
- * @return The length of the result string. It may be greater than destCapacity. In that case,
- *         only some of the result was written to the destination buffer.
- * @stable ICU 2.1
- */
-U_STABLE int32_t U_EXPORT2
-u_strToTitle(UChar *dest, int32_t destCapacity,
-             const UChar *src, int32_t srcLength,
-             UBreakIterator *titleIter,
-             const char *locale,
-             UErrorCode *pErrorCode);
-
-#endif
-
-/**
- * Case-fold the characters in a string.
- * Case-folding is locale-independent and not context-sensitive,
- * but there is an option for whether to include or exclude mappings for dotted I
- * and dotless i that are marked with 'I' in CaseFolding.txt.
- * The result may be longer or shorter than the original.
- * The source string and the destination buffer are allowed to overlap.
- *
- * @param dest      A buffer for the result string. The result will be zero-terminated if
- *                  the buffer is large enough.
- * @param destCapacity The size of the buffer (number of UChars). If it is 0, then
- *                  dest may be NULL and the function will only return the length of the result
- *                  without writing any of the result string.
- * @param src       The original string
- * @param srcLength The length of the original string. If -1, then src must be zero-terminated.
- * @param options   Either U_FOLD_CASE_DEFAULT or U_FOLD_CASE_EXCLUDE_SPECIAL_I
- * @param pErrorCode Must be a valid pointer to an error code value,
- *                  which must not indicate a failure before the function call.
- * @return The length of the result string. It may be greater than destCapacity. In that case,
- *         only some of the result was written to the destination buffer.
- * @stable ICU 2.0
- */
-U_STABLE int32_t U_EXPORT2
-u_strFoldCase(UChar *dest, int32_t destCapacity,
-              const UChar *src, int32_t srcLength,
-              uint32_t options,
-              UErrorCode *pErrorCode);
-
-#if defined(U_WCHAR_IS_UTF16) || defined(U_WCHAR_IS_UTF32) || !UCONFIG_NO_CONVERSION
-/**
- * Convert a UTF-16 string to a wchar_t string.
- * If it is known at compile time that wchar_t strings are in UTF-16 or UTF-32, then
- * this function simply calls the fast, dedicated function for that.
- * Otherwise, two conversions UTF-16 -> default charset -> wchar_t* are performed.
- *
- * @param dest          A buffer for the result string. The result will be zero-terminated if
- *                      the buffer is large enough.
- * @param destCapacity  The size of the buffer (number of wchar_t's). If it is 0, then
- *                      dest may be NULL and the function will only return the length of the 
- *                      result without writing any of the result string (pre-flighting).
- * @param pDestLength   A pointer to receive the number of units written to the destination. If 
- *                      pDestLength!=NULL then *pDestLength is always set to the 
- *                      number of output units corresponding to the transformation of 
- *                      all the input units, even in case of a buffer overflow.
- * @param src           The original source string
- * @param srcLength     The length of the original string. If -1, then src must be zero-terminated.
- * @param pErrorCode    Must be a valid pointer to an error code value,
- *                      which must not indicate a failure before the function call.
- * @return The pointer to destination buffer.
- * @stable ICU 2.0
- */
-U_STABLE wchar_t* U_EXPORT2
-u_strToWCS(wchar_t *dest, 
-           int32_t destCapacity,
-           int32_t *pDestLength,
-           const UChar *src, 
-           int32_t srcLength,
-           UErrorCode *pErrorCode);
-/**
- * Convert a wchar_t string to UTF-16.
- * If it is known at compile time that wchar_t strings are in UTF-16 or UTF-32, then
- * this function simply calls the fast, dedicated function for that.
- * Otherwise, two conversions wchar_t* -> default charset -> UTF-16 are performed.
- *
- * @param dest          A buffer for the result string. The result will be zero-terminated if
- *                      the buffer is large enough.
- * @param destCapacity  The size of the buffer (number of UChars). If it is 0, then
- *                      dest may be NULL and the function will only return the length of the 
- *                      result without writing any of the result string (pre-flighting).
- * @param pDestLength   A pointer to receive the number of units written to the destination. If 
- *                      pDestLength!=NULL then *pDestLength is always set to the 
- *                      number of output units corresponding to the transformation of 
- *                      all the input units, even in case of a buffer overflow.
- * @param src           The original source string
- * @param srcLength     The length of the original string. If -1, then src must be zero-terminated.
- * @param pErrorCode    Must be a valid pointer to an error code value,
- *                      which must not indicate a failure before the function call.
- * @return The pointer to destination buffer.
- * @stable ICU 2.0
- */
-U_STABLE UChar* U_EXPORT2
-u_strFromWCS(UChar   *dest,
-             int32_t destCapacity, 
-             int32_t *pDestLength,
-             const wchar_t *src,
-             int32_t srcLength,
-             UErrorCode *pErrorCode);
-#endif /* defined(U_WCHAR_IS_UTF16) || defined(U_WCHAR_IS_UTF32) || !UCONFIG_NO_CONVERSION */
-
-/**
- * Convert a UTF-16 string to UTF-8.
- * If the input string is not well-formed, then the U_INVALID_CHAR_FOUND error code is set.
- *
- * @param dest          A buffer for the result string. The result will be zero-terminated if
- *                      the buffer is large enough.
- * @param destCapacity  The size of the buffer (number of chars). If it is 0, then
- *                      dest may be NULL and the function will only return the length of the 
- *                      result without writing any of the result string (pre-flighting).
- * @param pDestLength   A pointer to receive the number of units written to the destination. If 
- *                      pDestLength!=NULL then *pDestLength is always set to the 
- *                      number of output units corresponding to the transformation of 
- *                      all the input units, even in case of a buffer overflow.
- * @param src           The original source string
- * @param srcLength     The length of the original string. If -1, then src must be zero-terminated.
- * @param pErrorCode    Must be a valid pointer to an error code value,
- *                      which must not indicate a failure before the function call.
- * @return The pointer to destination buffer.
- * @stable ICU 2.0
- * @see u_strToUTF8WithSub
- * @see u_strFromUTF8
- */
-U_STABLE char* U_EXPORT2 
-u_strToUTF8(char *dest,           
-            int32_t destCapacity,
-            int32_t *pDestLength,
-            const UChar *src, 
-            int32_t srcLength,
-            UErrorCode *pErrorCode);
-
-/**
- * Convert a UTF-8 string to UTF-16.
- * If the input string is not well-formed, then the U_INVALID_CHAR_FOUND error code is set.
- *
- * @param dest          A buffer for the result string. The result will be zero-terminated if
- *                      the buffer is large enough.
- * @param destCapacity  The size of the buffer (number of UChars). If it is 0, then
- *                      dest may be NULL and the function will only return the length of the 
- *                      result without writing any of the result string (pre-flighting).
- * @param pDestLength   A pointer to receive the number of units written to the destination. If 
- *                      pDestLength!=NULL then *pDestLength is always set to the 
- *                      number of output units corresponding to the transformation of 
- *                      all the input units, even in case of a buffer overflow.
- * @param src           The original source string
- * @param srcLength     The length of the original string. If -1, then src must be zero-terminated.
- * @param pErrorCode    Must be a valid pointer to an error code value,
- *                      which must not indicate a failure before the function call.
- * @return The pointer to destination buffer.
- * @stable ICU 2.0
- * @see u_strFromUTF8WithSub
- * @see u_strFromUTF8Lenient
- */
-U_STABLE UChar* U_EXPORT2
-u_strFromUTF8(UChar *dest,             
-              int32_t destCapacity,
-              int32_t *pDestLength,
-              const char *src, 
-              int32_t srcLength,
-              UErrorCode *pErrorCode);
-
-/**
- * Convert a UTF-16 string to UTF-8.
- * If the input string is not well-formed, then the U_INVALID_CHAR_FOUND error code is set.
- *
- * Same as u_strToUTF8() except for the additional subchar which is output for
- * illegal input sequences, instead of stopping with the U_INVALID_CHAR_FOUND error code.
- * With subchar==U_SENTINEL, this function behaves exactly like u_strToUTF8().
- *
- * @param dest          A buffer for the result string. The result will be zero-terminated if
- *                      the buffer is large enough.
- * @param destCapacity  The size of the buffer (number of chars). If it is 0, then
- *                      dest may be NULL and the function will only return the length of the 
- *                      result without writing any of the result string (pre-flighting).
- * @param pDestLength   A pointer to receive the number of units written to the destination. If 
- *                      pDestLength!=NULL then *pDestLength is always set to the 
- *                      number of output units corresponding to the transformation of 
- *                      all the input units, even in case of a buffer overflow.
- * @param src           The original source string
- * @param srcLength     The length of the original string. If -1, then src must be zero-terminated.
- * @param subchar       The substitution character to use in place of an illegal input sequence,
- *                      or U_SENTINEL if the function is to return with U_INVALID_CHAR_FOUND instead.
- *                      A substitution character can be any valid Unicode code point (up to U+10FFFF)
- *                      except for surrogate code points (U+D800..U+DFFF).
- *                      The recommended value is U+FFFD "REPLACEMENT CHARACTER".
- * @param pNumSubstitutions Output parameter receiving the number of substitutions if subchar>=0.
- *                      Set to 0 if no substitutions occur or subchar<0.
- *                      pNumSubstitutions can be NULL.
- * @param pErrorCode    Pointer to a standard ICU error code. Its input value must
- *                      pass the U_SUCCESS() test, or else the function returns
- *                      immediately. Check for U_FAILURE() on output or use with
- *                      function chaining. (See User Guide for details.)
- * @return The pointer to destination buffer.
- * @see u_strToUTF8
- * @see u_strFromUTF8WithSub
- * @stable ICU 3.6
- */
-U_STABLE char* U_EXPORT2
-u_strToUTF8WithSub(char *dest,
-            int32_t destCapacity,
-            int32_t *pDestLength,
-            const UChar *src,
-            int32_t srcLength,
-            UChar32 subchar, int32_t *pNumSubstitutions,
-            UErrorCode *pErrorCode);
-
-/**
- * Convert a UTF-8 string to UTF-16.
- * If the input string is not well-formed, then the U_INVALID_CHAR_FOUND error code is set.
- *
- * Same as u_strFromUTF8() except for the additional subchar which is output for
- * illegal input sequences, instead of stopping with the U_INVALID_CHAR_FOUND error code.
- * With subchar==U_SENTINEL, this function behaves exactly like u_strFromUTF8().
- *
- * @param dest          A buffer for the result string. The result will be zero-terminated if
- *                      the buffer is large enough.
- * @param destCapacity  The size of the buffer (number of UChars). If it is 0, then
- *                      dest may be NULL and the function will only return the length of the 
- *                      result without writing any of the result string (pre-flighting).
- * @param pDestLength   A pointer to receive the number of units written to the destination. If 
- *                      pDestLength!=NULL then *pDestLength is always set to the 
- *                      number of output units corresponding to the transformation of 
- *                      all the input units, even in case of a buffer overflow.
- * @param src           The original source string
- * @param srcLength     The length of the original string. If -1, then src must be zero-terminated.
- * @param subchar       The substitution character to use in place of an illegal input sequence,
- *                      or U_SENTINEL if the function is to return with U_INVALID_CHAR_FOUND instead.
- *                      A substitution character can be any valid Unicode code point (up to U+10FFFF)
- *                      except for surrogate code points (U+D800..U+DFFF).
- *                      The recommended value is U+FFFD "REPLACEMENT CHARACTER".
- * @param pNumSubstitutions Output parameter receiving the number of substitutions if subchar>=0.
- *                      Set to 0 if no substitutions occur or subchar<0.
- *                      pNumSubstitutions can be NULL.
- * @param pErrorCode    Pointer to a standard ICU error code. Its input value must
- *                      pass the U_SUCCESS() test, or else the function returns
- *                      immediately. Check for U_FAILURE() on output or use with
- *                      function chaining. (See User Guide for details.)
- * @return The pointer to destination buffer.
- * @see u_strFromUTF8
- * @see u_strFromUTF8Lenient
- * @see u_strToUTF8WithSub
- * @stable ICU 3.6
- */
-U_STABLE UChar* U_EXPORT2
-u_strFromUTF8WithSub(UChar *dest,
-              int32_t destCapacity,
-              int32_t *pDestLength,
-              const char *src,
-              int32_t srcLength,
-              UChar32 subchar, int32_t *pNumSubstitutions,
-              UErrorCode *pErrorCode);
-
-/**
- * Convert a UTF-8 string to UTF-16.
- *
- * Same as u_strFromUTF8() except that this function is designed to be very fast,
- * which it achieves by being lenient about malformed UTF-8 sequences.
- * This function is intended for use in environments where UTF-8 text is
- * expected to be well-formed.
- *
- * Its semantics are:
- * - Well-formed UTF-8 text is correctly converted to well-formed UTF-16 text.
- * - The function will not read beyond the input string, nor write beyond
- *   the destCapacity.
- * - Malformed UTF-8 results in "garbage" 16-bit Unicode strings which may not
- *   be well-formed UTF-16.
- *   The function will resynchronize to valid code point boundaries
- *   within a small number of code points after an illegal sequence.
- * - Non-shortest forms are not detected and will result in "spoofing" output.
- *
- * For further performance improvement, if srcLength is given (>=0),
- * then it must be destCapacity>=srcLength.
- *
- * There is no inverse u_strToUTF8Lenient() function because there is practically
- * no performance gain from not checking that a UTF-16 string is well-formed.
- *
- * @param dest          A buffer for the result string. The result will be zero-terminated if
- *                      the buffer is large enough.
- * @param destCapacity  The size of the buffer (number of UChars). If it is 0, then
- *                      dest may be NULL and the function will only return the length of the 
- *                      result without writing any of the result string (pre-flighting).
- *                      Unlike for other ICU functions, if srcLength>=0 then it
- *                      must be destCapacity>=srcLength.
- * @param pDestLength   A pointer to receive the number of units written to the destination. If 
- *                      pDestLength!=NULL then *pDestLength is always set to the 
- *                      number of output units corresponding to the transformation of 
- *                      all the input units, even in case of a buffer overflow.
- *                      Unlike for other ICU functions, if srcLength>=0 but
- *                      destCapacity<srcLength, then *pDestLength will be set to srcLength
- *                      (and U_BUFFER_OVERFLOW_ERROR will be set)
- *                      regardless of the actual result length.
- * @param src           The original source string
- * @param srcLength     The length of the original string. If -1, then src must be zero-terminated.
- * @param pErrorCode    Pointer to a standard ICU error code. Its input value must
- *                      pass the U_SUCCESS() test, or else the function returns
- *                      immediately. Check for U_FAILURE() on output or use with
- *                      function chaining. (See User Guide for details.)
- * @return The pointer to destination buffer.
- * @see u_strFromUTF8
- * @see u_strFromUTF8WithSub
- * @see u_strToUTF8WithSub
- * @stable ICU 3.6
- */
-U_STABLE UChar * U_EXPORT2
-u_strFromUTF8Lenient(UChar *dest,
-                     int32_t destCapacity,
-                     int32_t *pDestLength,
-                     const char *src,
-                     int32_t srcLength,
-                     UErrorCode *pErrorCode);
-
-/**
- * Convert a UTF-16 string to UTF-32.
- * If the input string is not well-formed, then the U_INVALID_CHAR_FOUND error code is set.
- *
- * @param dest          A buffer for the result string. The result will be zero-terminated if
- *                      the buffer is large enough.
- * @param destCapacity  The size of the buffer (number of UChar32s). If it is 0, then
- *                      dest may be NULL and the function will only return the length of the 
- *                      result without writing any of the result string (pre-flighting).
- * @param pDestLength   A pointer to receive the number of units written to the destination. If 
- *                      pDestLength!=NULL then *pDestLength is always set to the 
- *                      number of output units corresponding to the transformation of 
- *                      all the input units, even in case of a buffer overflow.
- * @param src           The original source string
- * @param srcLength     The length of the original string. If -1, then src must be zero-terminated.
- * @param pErrorCode    Must be a valid pointer to an error code value,
- *                      which must not indicate a failure before the function call.
- * @return The pointer to destination buffer.
- * @see u_strToUTF32WithSub
- * @see u_strFromUTF32
- * @stable ICU 2.0
- */
-U_STABLE UChar32* U_EXPORT2 
-u_strToUTF32(UChar32 *dest, 
-             int32_t  destCapacity,
-             int32_t  *pDestLength,
-             const UChar *src, 
-             int32_t  srcLength,
-             UErrorCode *pErrorCode);
-
-/**
- * Convert a UTF-32 string to UTF-16.
- * If the input string is not well-formed, then the U_INVALID_CHAR_FOUND error code is set.
- *
- * @param dest          A buffer for the result string. The result will be zero-terminated if
- *                      the buffer is large enough.
- * @param destCapacity  The size of the buffer (number of UChars). If it is 0, then
- *                      dest may be NULL and the function will only return the length of the 
- *                      result without writing any of the result string (pre-flighting).
- * @param pDestLength   A pointer to receive the number of units written to the destination. If 
- *                      pDestLength!=NULL then *pDestLength is always set to the 
- *                      number of output units corresponding to the transformation of 
- *                      all the input units, even in case of a buffer overflow.
- * @param src           The original source string
- * @param srcLength     The length of the original string. If -1, then src must be zero-terminated.
- * @param pErrorCode    Must be a valid pointer to an error code value,
- *                      which must not indicate a failure before the function call.
- * @return The pointer to destination buffer.
- * @see u_strFromUTF32WithSub
- * @see u_strToUTF32
- * @stable ICU 2.0
- */
-U_STABLE UChar* U_EXPORT2 
-u_strFromUTF32(UChar   *dest,
-               int32_t destCapacity, 
-               int32_t *pDestLength,
-               const UChar32 *src,
-               int32_t srcLength,
-               UErrorCode *pErrorCode);
-
-/**
- * Convert a UTF-16 string to UTF-32.
- * If the input string is not well-formed, then the U_INVALID_CHAR_FOUND error code is set.
- *
- * Same as u_strToUTF32() except for the additional subchar which is output for
- * illegal input sequences, instead of stopping with the U_INVALID_CHAR_FOUND error code.
- * With subchar==U_SENTINEL, this function behaves exactly like u_strToUTF32().
- *
- * @param dest          A buffer for the result string. The result will be zero-terminated if
- *                      the buffer is large enough.
- * @param destCapacity  The size of the buffer (number of UChar32s). If it is 0, then
- *                      dest may be NULL and the function will only return the length of the
- *                      result without writing any of the result string (pre-flighting).
- * @param pDestLength   A pointer to receive the number of units written to the destination. If
- *                      pDestLength!=NULL then *pDestLength is always set to the
- *                      number of output units corresponding to the transformation of
- *                      all the input units, even in case of a buffer overflow.
- * @param src           The original source string
- * @param srcLength     The length of the original string. If -1, then src must be zero-terminated.
- * @param subchar       The substitution character to use in place of an illegal input sequence,
- *                      or U_SENTINEL if the function is to return with U_INVALID_CHAR_FOUND instead.
- *                      A substitution character can be any valid Unicode code point (up to U+10FFFF)
- *                      except for surrogate code points (U+D800..U+DFFF).
- *                      The recommended value is U+FFFD "REPLACEMENT CHARACTER".
- * @param pNumSubstitutions Output parameter receiving the number of substitutions if subchar>=0.
- *                      Set to 0 if no substitutions occur or subchar<0.
- *                      pNumSubstitutions can be NULL.
- * @param pErrorCode    Pointer to a standard ICU error code. Its input value must
- *                      pass the U_SUCCESS() test, or else the function returns
- *                      immediately. Check for U_FAILURE() on output or use with
- *                      function chaining. (See User Guide for details.)
- * @return The pointer to destination buffer.
- * @see u_strToUTF32
- * @see u_strFromUTF32WithSub
- * @stable ICU 4.2
- */
-U_STABLE UChar32* U_EXPORT2
-u_strToUTF32WithSub(UChar32 *dest,
-             int32_t destCapacity,
-             int32_t *pDestLength,
-             const UChar *src,
-             int32_t srcLength,
-             UChar32 subchar, int32_t *pNumSubstitutions,
-             UErrorCode *pErrorCode);
-
-/**
- * Convert a UTF-32 string to UTF-16.
- * If the input string is not well-formed, then the U_INVALID_CHAR_FOUND error code is set.
- *
- * Same as u_strFromUTF32() except for the additional subchar which is output for
- * illegal input sequences, instead of stopping with the U_INVALID_CHAR_FOUND error code.
- * With subchar==U_SENTINEL, this function behaves exactly like u_strFromUTF32().
- *
- * @param dest          A buffer for the result string. The result will be zero-terminated if
- *                      the buffer is large enough.
- * @param destCapacity  The size of the buffer (number of UChars). If it is 0, then
- *                      dest may be NULL and the function will only return the length of the
- *                      result without writing any of the result string (pre-flighting).
- * @param pDestLength   A pointer to receive the number of units written to the destination. If
- *                      pDestLength!=NULL then *pDestLength is always set to the
- *                      number of output units corresponding to the transformation of
- *                      all the input units, even in case of a buffer overflow.
- * @param src           The original source string
- * @param srcLength     The length of the original string. If -1, then src must be zero-terminated.
- * @param subchar       The substitution character to use in place of an illegal input sequence,
- *                      or U_SENTINEL if the function is to return with U_INVALID_CHAR_FOUND instead.
- *                      A substitution character can be any valid Unicode code point (up to U+10FFFF)
- *                      except for surrogate code points (U+D800..U+DFFF).
- *                      The recommended value is U+FFFD "REPLACEMENT CHARACTER".
- * @param pNumSubstitutions Output parameter receiving the number of substitutions if subchar>=0.
- *                      Set to 0 if no substitutions occur or subchar<0.
- *                      pNumSubstitutions can be NULL.
- * @param pErrorCode    Pointer to a standard ICU error code. Its input value must
- *                      pass the U_SUCCESS() test, or else the function returns
- *                      immediately. Check for U_FAILURE() on output or use with
- *                      function chaining. (See User Guide for details.)
- * @return The pointer to destination buffer.
- * @see u_strFromUTF32
- * @see u_strToUTF32WithSub
- * @stable ICU 4.2
- */
-U_STABLE UChar* U_EXPORT2
-u_strFromUTF32WithSub(UChar *dest,
-               int32_t destCapacity,
-               int32_t *pDestLength,
-               const UChar32 *src,
-               int32_t srcLength,
-               UChar32 subchar, int32_t *pNumSubstitutions,
-               UErrorCode *pErrorCode);
-
-/**
- * Convert a 16-bit Unicode string to Java Modified UTF-8.
- * See http://java.sun.com/javase/6/docs/api/java/io/DataInput.html#modified-utf-8
- *
- * This function behaves according to the documentation for Java DataOutput.writeUTF()
- * except that it does not encode the output length in the destination buffer
- * and does not have an output length restriction.
- * See http://java.sun.com/javase/6/docs/api/java/io/DataOutput.html#writeUTF(java.lang.String)
- *
- * The input string need not be well-formed UTF-16.
- * (Therefore there is no subchar parameter.)
- *
- * @param dest          A buffer for the result string. The result will be zero-terminated if
- *                      the buffer is large enough.
- * @param destCapacity  The size of the buffer (number of chars). If it is 0, then
- *                      dest may be NULL and the function will only return the length of the 
- *                      result without writing any of the result string (pre-flighting).
- * @param pDestLength   A pointer to receive the number of units written to the destination. If 
- *                      pDestLength!=NULL then *pDestLength is always set to the 
- *                      number of output units corresponding to the transformation of 
- *                      all the input units, even in case of a buffer overflow.
- * @param src           The original source string
- * @param srcLength     The length of the original string. If -1, then src must be zero-terminated.
- * @param pErrorCode    Pointer to a standard ICU error code. Its input value must
- *                      pass the U_SUCCESS() test, or else the function returns
- *                      immediately. Check for U_FAILURE() on output or use with
- *                      function chaining. (See User Guide for details.)
- * @return The pointer to destination buffer.
- * @stable ICU 4.4
- * @see u_strToUTF8WithSub
- * @see u_strFromJavaModifiedUTF8WithSub
- */
-U_STABLE char* U_EXPORT2 
-u_strToJavaModifiedUTF8(
-        char *dest,
-        int32_t destCapacity,
-        int32_t *pDestLength,
-        const UChar *src, 
-        int32_t srcLength,
-        UErrorCode *pErrorCode);
-
-/**
- * Convert a Java Modified UTF-8 string to a 16-bit Unicode string.
- * If the input string is not well-formed, then the U_INVALID_CHAR_FOUND error code is set.
- *
- * This function behaves according to the documentation for Java DataInput.readUTF()
- * except that it takes a length parameter rather than
- * interpreting the first two input bytes as the length.
- * See http://java.sun.com/javase/6/docs/api/java/io/DataInput.html#readUTF()
- *
- * The output string may not be well-formed UTF-16.
- *
- * @param dest          A buffer for the result string. The result will be zero-terminated if
- *                      the buffer is large enough.
- * @param destCapacity  The size of the buffer (number of UChars). If it is 0, then
- *                      dest may be NULL and the function will only return the length of the 
- *                      result without writing any of the result string (pre-flighting).
- * @param pDestLength   A pointer to receive the number of units written to the destination. If 
- *                      pDestLength!=NULL then *pDestLength is always set to the 
- *                      number of output units corresponding to the transformation of 
- *                      all the input units, even in case of a buffer overflow.
- * @param src           The original source string
- * @param srcLength     The length of the original string. If -1, then src must be zero-terminated.
- * @param subchar       The substitution character to use in place of an illegal input sequence,
- *                      or U_SENTINEL if the function is to return with U_INVALID_CHAR_FOUND instead.
- *                      A substitution character can be any valid Unicode code point (up to U+10FFFF)
- *                      except for surrogate code points (U+D800..U+DFFF).
- *                      The recommended value is U+FFFD "REPLACEMENT CHARACTER".
- * @param pNumSubstitutions Output parameter receiving the number of substitutions if subchar>=0.
- *                      Set to 0 if no substitutions occur or subchar<0.
- *                      pNumSubstitutions can be NULL.
- * @param pErrorCode    Pointer to a standard ICU error code. Its input value must
- *                      pass the U_SUCCESS() test, or else the function returns
- *                      immediately. Check for U_FAILURE() on output or use with
- *                      function chaining. (See User Guide for details.)
- * @return The pointer to destination buffer.
- * @see u_strFromUTF8WithSub
- * @see u_strFromUTF8Lenient
- * @see u_strToJavaModifiedUTF8
- * @stable ICU 4.4
- */
-U_STABLE UChar* U_EXPORT2
-u_strFromJavaModifiedUTF8WithSub(
-        UChar *dest,
-        int32_t destCapacity,
-        int32_t *pDestLength,
-        const char *src,
-        int32_t srcLength,
-        UChar32 subchar, int32_t *pNumSubstitutions,
-        UErrorCode *pErrorCode);
-
-#endif