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Issue #1971 - Part 2: Update ICU source to 63.2.

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// © 2017 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
// casemap.h
// created: 2017jan12 Markus W. Scherer
#ifndef __CASEMAP_H__
#define __CASEMAP_H__
#include "unicode/utypes.h"
#include "unicode/stringpiece.h"
#include "unicode/uobject.h"
/**
* \file
* \brief C++ API: Low-level C++ case mapping functions.
*/
U_NAMESPACE_BEGIN
class BreakIterator;
class ByteSink;
class Edits;
/**
* Low-level C++ case mapping functions.
*
* @stable ICU 59
*/
class U_COMMON_API CaseMap U_FINAL : public UMemory {
public:
/**
* Lowercases a UTF-16 string and optionally records edits.
* Casing is locale-dependent and context-sensitive.
* The result may be longer or shorter than the original.
* The source string and the destination buffer must not overlap.
*
* @param locale The locale ID. ("" = root locale, NULL = default locale.)
* @param options Options bit set, usually 0. See U_OMIT_UNCHANGED_TEXT and U_EDITS_NO_RESET.
* @param src The original string.
* @param srcLength The length of the original string. If -1, then src must be NUL-terminated.
* @param dest A buffer for the result string. The result will be NUL-terminated if
* the buffer is large enough.
* The contents is undefined in case of failure.
* @param destCapacity The size of the buffer (number of char16_ts). 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 edits Records edits for index mapping, working with styled text,
* and getting only changes (if any).
* The Edits contents is undefined if any error occurs.
* This function calls edits->reset() first unless
* options includes U_EDITS_NO_RESET. edits can be NULL.
* @param errorCode Reference to an in/out error code value
* which must not indicate a failure before the function call.
* @return The length of the result string, if successful.
* When the result would be longer than destCapacity,
* the full length is returned and a U_BUFFER_OVERFLOW_ERROR is set.
*
* @see u_strToLower
* @stable ICU 59
*/
static int32_t toLower(
const char *locale, uint32_t options,
const char16_t *src, int32_t srcLength,
char16_t *dest, int32_t destCapacity, Edits *edits,
UErrorCode &errorCode);
/**
* Uppercases a UTF-16 string and optionally records edits.
* Casing is locale-dependent and context-sensitive.
* The result may be longer or shorter than the original.
* The source string and the destination buffer must not overlap.
*
* @param locale The locale ID. ("" = root locale, NULL = default locale.)
* @param options Options bit set, usually 0. See U_OMIT_UNCHANGED_TEXT and U_EDITS_NO_RESET.
* @param src The original string.
* @param srcLength The length of the original string. If -1, then src must be NUL-terminated.
* @param dest A buffer for the result string. The result will be NUL-terminated if
* the buffer is large enough.
* The contents is undefined in case of failure.
* @param destCapacity The size of the buffer (number of char16_ts). 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 edits Records edits for index mapping, working with styled text,
* and getting only changes (if any).
* The Edits contents is undefined if any error occurs.
* This function calls edits->reset() first unless
* options includes U_EDITS_NO_RESET. edits can be NULL.
* @param errorCode Reference to an in/out error code value
* which must not indicate a failure before the function call.
* @return The length of the result string, if successful.
* When the result would be longer than destCapacity,
* the full length is returned and a U_BUFFER_OVERFLOW_ERROR is set.
*
* @see u_strToUpper
* @stable ICU 59
*/
static int32_t toUpper(
const char *locale, uint32_t options,
const char16_t *src, int32_t srcLength,
char16_t *dest, int32_t destCapacity, Edits *edits,
UErrorCode &errorCode);
#if !UCONFIG_NO_BREAK_ITERATION
/**
* Titlecases a UTF-16 string and optionally records edits.
* Casing is locale-dependent and context-sensitive.
* The result may be longer or shorter than the original.
* The source string and the destination buffer must not overlap.
*
* 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. (This can be modified with options bits.)
*
* @param locale The locale ID. ("" = root locale, NULL = default locale.)
* @param options Options bit set, usually 0. See U_OMIT_UNCHANGED_TEXT, U_EDITS_NO_RESET,
* U_TITLECASE_NO_LOWERCASE,
* U_TITLECASE_NO_BREAK_ADJUSTMENT, U_TITLECASE_ADJUST_TO_CASED,
* U_TITLECASE_WHOLE_STRING, U_TITLECASE_SENTENCES.
* @param iter A break iterator to find the first characters of words that are to be titlecased.
* It is set to the source string (setText())
* and used one or more times for iteration (first() and next()).
* If NULL, then a word break iterator for the locale is used
* (or something equivalent).
* @param src The original string.
* @param srcLength The length of the original string. If -1, then src must be NUL-terminated.
* @param dest A buffer for the result string. The result will be NUL-terminated if
* the buffer is large enough.
* The contents is undefined in case of failure.
* @param destCapacity The size of the buffer (number of char16_ts). 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 edits Records edits for index mapping, working with styled text,
* and getting only changes (if any).
* The Edits contents is undefined if any error occurs.
* This function calls edits->reset() first unless
* options includes U_EDITS_NO_RESET. edits can be NULL.
* @param errorCode Reference to an in/out error code value
* which must not indicate a failure before the function call.
* @return The length of the result string, if successful.
* When the result would be longer than destCapacity,
* the full length is returned and a U_BUFFER_OVERFLOW_ERROR is set.
*
* @see u_strToTitle
* @see ucasemap_toTitle
* @stable ICU 59
*/
static int32_t toTitle(
const char *locale, uint32_t options, BreakIterator *iter,
const char16_t *src, int32_t srcLength,
char16_t *dest, int32_t destCapacity, Edits *edits,
UErrorCode &errorCode);
#endif // UCONFIG_NO_BREAK_ITERATION
/**
* Case-folds a UTF-16 string and optionally records edits.
*
* 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 'T' in CaseFolding.txt.
*
* The result may be longer or shorter than the original.
* The source string and the destination buffer must not overlap.
*
* @param options Options bit set, usually 0. See U_OMIT_UNCHANGED_TEXT, U_EDITS_NO_RESET,
* U_FOLD_CASE_DEFAULT, U_FOLD_CASE_EXCLUDE_SPECIAL_I.
* @param src The original string.
* @param srcLength The length of the original string. If -1, then src must be NUL-terminated.
* @param dest A buffer for the result string. The result will be NUL-terminated if
* the buffer is large enough.
* The contents is undefined in case of failure.
* @param destCapacity The size of the buffer (number of char16_ts). 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 edits Records edits for index mapping, working with styled text,
* and getting only changes (if any).
* The Edits contents is undefined if any error occurs.
* This function calls edits->reset() first unless
* options includes U_EDITS_NO_RESET. edits can be NULL.
* @param errorCode Reference to an in/out error code value
* which must not indicate a failure before the function call.
* @return The length of the result string, if successful.
* When the result would be longer than destCapacity,
* the full length is returned and a U_BUFFER_OVERFLOW_ERROR is set.
*
* @see u_strFoldCase
* @stable ICU 59
*/
static int32_t fold(
uint32_t options,
const char16_t *src, int32_t srcLength,
char16_t *dest, int32_t destCapacity, Edits *edits,
UErrorCode &errorCode);
/**
* Lowercases a UTF-8 string and optionally records edits.
* Casing is locale-dependent and context-sensitive.
* The result may be longer or shorter than the original.
*
* @param locale The locale ID. ("" = root locale, NULL = default locale.)
* @param options Options bit set, usually 0. See U_OMIT_UNCHANGED_TEXT and U_EDITS_NO_RESET.
* @param src The original string.
* @param sink A ByteSink to which the result string is written.
* sink.Flush() is called at the end.
* @param edits Records edits for index mapping, working with styled text,
* and getting only changes (if any).
* The Edits contents is undefined if any error occurs.
* This function calls edits->reset() first unless
* options includes U_EDITS_NO_RESET. edits can be NULL.
* @param errorCode Reference to an in/out error code value
* which must not indicate a failure before the function call.
*
* @see ucasemap_utf8ToLower
* @stable ICU 60
*/
static void utf8ToLower(
const char *locale, uint32_t options,
StringPiece src, ByteSink &sink, Edits *edits,
UErrorCode &errorCode);
/**
* Uppercases a UTF-8 string and optionally records edits.
* Casing is locale-dependent and context-sensitive.
* The result may be longer or shorter than the original.
*
* @param locale The locale ID. ("" = root locale, NULL = default locale.)
* @param options Options bit set, usually 0. See U_OMIT_UNCHANGED_TEXT and U_EDITS_NO_RESET.
* @param src The original string.
* @param sink A ByteSink to which the result string is written.
* sink.Flush() is called at the end.
* @param edits Records edits for index mapping, working with styled text,
* and getting only changes (if any).
* The Edits contents is undefined if any error occurs.
* This function calls edits->reset() first unless
* options includes U_EDITS_NO_RESET. edits can be NULL.
* @param errorCode Reference to an in/out error code value
* which must not indicate a failure before the function call.
*
* @see ucasemap_utf8ToUpper
* @stable ICU 60
*/
static void utf8ToUpper(
const char *locale, uint32_t options,
StringPiece src, ByteSink &sink, Edits *edits,
UErrorCode &errorCode);
#if !UCONFIG_NO_BREAK_ITERATION
/**
* Titlecases a UTF-8 string and optionally records edits.
* Casing is locale-dependent and context-sensitive.
* The result may be longer or shorter than the original.
*
* 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. (This can be modified with options bits.)
*
* @param locale The locale ID. ("" = root locale, NULL = default locale.)
* @param options Options bit set, usually 0. See U_OMIT_UNCHANGED_TEXT, U_EDITS_NO_RESET,
* U_TITLECASE_NO_LOWERCASE,
* U_TITLECASE_NO_BREAK_ADJUSTMENT, U_TITLECASE_ADJUST_TO_CASED,
* U_TITLECASE_WHOLE_STRING, U_TITLECASE_SENTENCES.
* @param iter A break iterator to find the first characters of words that are to be titlecased.
* It is set to the source string (setUText())
* and used one or more times for iteration (first() and next()).
* If NULL, then a word break iterator for the locale is used
* (or something equivalent).
* @param src The original string.
* @param sink A ByteSink to which the result string is written.
* sink.Flush() is called at the end.
* @param edits Records edits for index mapping, working with styled text,
* and getting only changes (if any).
* The Edits contents is undefined if any error occurs.
* This function calls edits->reset() first unless
* options includes U_EDITS_NO_RESET. edits can be NULL.
* @param errorCode Reference to an in/out error code value
* which must not indicate a failure before the function call.
*
* @see ucasemap_utf8ToTitle
* @stable ICU 60
*/
static void utf8ToTitle(
const char *locale, uint32_t options, BreakIterator *iter,
StringPiece src, ByteSink &sink, Edits *edits,
UErrorCode &errorCode);
#endif // UCONFIG_NO_BREAK_ITERATION
/**
* Case-folds a UTF-8 string and optionally records edits.
*
* 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 'T' in CaseFolding.txt.
*
* The result may be longer or shorter than the original.
*
* @param options Options bit set, usually 0. See U_OMIT_UNCHANGED_TEXT and U_EDITS_NO_RESET.
* @param src The original string.
* @param sink A ByteSink to which the result string is written.
* sink.Flush() is called at the end.
* @param edits Records edits for index mapping, working with styled text,
* and getting only changes (if any).
* The Edits contents is undefined if any error occurs.
* This function calls edits->reset() first unless
* options includes U_EDITS_NO_RESET. edits can be NULL.
* @param errorCode Reference to an in/out error code value
* which must not indicate a failure before the function call.
*
* @see ucasemap_utf8FoldCase
* @stable ICU 60
*/
static void utf8Fold(
uint32_t options,
StringPiece src, ByteSink &sink, Edits *edits,
UErrorCode &errorCode);
/**
* Lowercases a UTF-8 string and optionally records edits.
* Casing is locale-dependent and context-sensitive.
* The result may be longer or shorter than the original.
* The source string and the destination buffer must not overlap.
*
* @param locale The locale ID. ("" = root locale, NULL = default locale.)
* @param options Options bit set, usually 0. See U_OMIT_UNCHANGED_TEXT and U_EDITS_NO_RESET.
* @param src The original string.
* @param srcLength The length of the original string. If -1, then src must be NUL-terminated.
* @param dest A buffer for the result string. The result will be NUL-terminated if
* the buffer is large enough.
* The contents is undefined in case of failure.
* @param destCapacity The size of the buffer (number of bytes). 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 edits Records edits for index mapping, working with styled text,
* and getting only changes (if any).
* The Edits contents is undefined if any error occurs.
* This function calls edits->reset() first unless
* options includes U_EDITS_NO_RESET. edits can be NULL.
* @param errorCode Reference to an in/out error code value
* which must not indicate a failure before the function call.
* @return The length of the result string, if successful.
* When the result would be longer than destCapacity,
* the full length is returned and a U_BUFFER_OVERFLOW_ERROR is set.
*
* @see ucasemap_utf8ToLower
* @stable ICU 59
*/
static int32_t utf8ToLower(
const char *locale, uint32_t options,
const char *src, int32_t srcLength,
char *dest, int32_t destCapacity, Edits *edits,
UErrorCode &errorCode);
/**
* Uppercases a UTF-8 string and optionally records edits.
* Casing is locale-dependent and context-sensitive.
* The result may be longer or shorter than the original.
* The source string and the destination buffer must not overlap.
*
* @param locale The locale ID. ("" = root locale, NULL = default locale.)
* @param options Options bit set, usually 0. See U_OMIT_UNCHANGED_TEXT and U_EDITS_NO_RESET.
* @param src The original string.
* @param srcLength The length of the original string. If -1, then src must be NUL-terminated.
* @param dest A buffer for the result string. The result will be NUL-terminated if
* the buffer is large enough.
* The contents is undefined in case of failure.
* @param destCapacity The size of the buffer (number of bytes). 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 edits Records edits for index mapping, working with styled text,
* and getting only changes (if any).
* The Edits contents is undefined if any error occurs.
* This function calls edits->reset() first unless
* options includes U_EDITS_NO_RESET. edits can be NULL.
* @param errorCode Reference to an in/out error code value
* which must not indicate a failure before the function call.
* @return The length of the result string, if successful.
* When the result would be longer than destCapacity,
* the full length is returned and a U_BUFFER_OVERFLOW_ERROR is set.
*
* @see ucasemap_utf8ToUpper
* @stable ICU 59
*/
static int32_t utf8ToUpper(
const char *locale, uint32_t options,
const char *src, int32_t srcLength,
char *dest, int32_t destCapacity, Edits *edits,
UErrorCode &errorCode);
#if !UCONFIG_NO_BREAK_ITERATION
/**
* Titlecases a UTF-8 string and optionally records edits.
* Casing is locale-dependent and context-sensitive.
* The result may be longer or shorter than the original.
* The source string and the destination buffer must not overlap.
*
* 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. (This can be modified with options bits.)
*
* @param locale The locale ID. ("" = root locale, NULL = default locale.)
* @param options Options bit set, usually 0. See U_OMIT_UNCHANGED_TEXT, U_EDITS_NO_RESET,
* U_TITLECASE_NO_LOWERCASE,
* U_TITLECASE_NO_BREAK_ADJUSTMENT, U_TITLECASE_ADJUST_TO_CASED,
* U_TITLECASE_WHOLE_STRING, U_TITLECASE_SENTENCES.
* @param iter A break iterator to find the first characters of words that are to be titlecased.
* It is set to the source string (setUText())
* and used one or more times for iteration (first() and next()).
* If NULL, then a word break iterator for the locale is used
* (or something equivalent).
* @param src The original string.
* @param srcLength The length of the original string. If -1, then src must be NUL-terminated.
* @param dest A buffer for the result string. The result will be NUL-terminated if
* the buffer is large enough.
* The contents is undefined in case of failure.
* @param destCapacity The size of the buffer (number of bytes). 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 edits Records edits for index mapping, working with styled text,
* and getting only changes (if any).
* The Edits contents is undefined if any error occurs.
* This function calls edits->reset() first unless
* options includes U_EDITS_NO_RESET. edits can be NULL.
* @param errorCode Reference to an in/out error code value
* which must not indicate a failure before the function call.
* @return The length of the result string, if successful.
* When the result would be longer than destCapacity,
* the full length is returned and a U_BUFFER_OVERFLOW_ERROR is set.
*
* @see ucasemap_utf8ToTitle
* @stable ICU 59
*/
static int32_t utf8ToTitle(
const char *locale, uint32_t options, BreakIterator *iter,
const char *src, int32_t srcLength,
char *dest, int32_t destCapacity, Edits *edits,
UErrorCode &errorCode);
#endif // UCONFIG_NO_BREAK_ITERATION
/**
* Case-folds a UTF-8 string and optionally records edits.
*
* 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 'T' in CaseFolding.txt.
*
* The result may be longer or shorter than the original.
* The source string and the destination buffer must not overlap.
*
* @param options Options bit set, usually 0. See U_OMIT_UNCHANGED_TEXT, U_EDITS_NO_RESET,
* U_FOLD_CASE_DEFAULT, U_FOLD_CASE_EXCLUDE_SPECIAL_I.
* @param src The original string.
* @param srcLength The length of the original string. If -1, then src must be NUL-terminated.
* @param dest A buffer for the result string. The result will be NUL-terminated if
* the buffer is large enough.
* The contents is undefined in case of failure.
* @param destCapacity The size of the buffer (number of bytes). 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 edits Records edits for index mapping, working with styled text,
* and getting only changes (if any).
* The Edits contents is undefined if any error occurs.
* This function calls edits->reset() first unless
* options includes U_EDITS_NO_RESET. edits can be NULL.
* @param errorCode Reference to an in/out error code value
* which must not indicate a failure before the function call.
* @return The length of the result string, if successful.
* When the result would be longer than destCapacity,
* the full length is returned and a U_BUFFER_OVERFLOW_ERROR is set.
*
* @see ucasemap_utf8FoldCase
* @stable ICU 59
*/
static int32_t utf8Fold(
uint32_t options,
const char *src, int32_t srcLength,
char *dest, int32_t destCapacity, Edits *edits,
UErrorCode &errorCode);
private:
CaseMap() = delete;
CaseMap(const CaseMap &other) = delete;
CaseMap &operator=(const CaseMap &other) = delete;
};
U_NAMESPACE_END
#endif // __CASEMAP_H__