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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
*
* Copyright (C) 2005-2012, International Business Machines
* Corporation and others. All Rights Reserved.
*
*******************************************************************************
* file name: ucasemap.h
* encoding: UTF-8
* tab size: 8 (not used)
* indentation:4
*
* created on: 2005may06
* created by: Markus W. Scherer
*
* Case mapping service object and functions using it.
*/
#ifndef __UCASEMAP_H__
#define __UCASEMAP_H__
#include "unicode/utypes.h"
#include "unicode/stringoptions.h"
#include "unicode/ustring.h"
#if U_SHOW_CPLUSPLUS_API
#include "unicode/localpointer.h"
#endif // U_SHOW_CPLUSPLUS_API
/**
* \file
* \brief C API: Unicode case mapping functions using a UCaseMap service object.
*
* The service object takes care of memory allocations, data loading, and setup
* for the attributes, as usual.
*
* Currently, the functionality provided here does not overlap with uchar.h
* and ustring.h, except for ucasemap_toTitle().
*
* ucasemap_utf8XYZ() functions operate directly on UTF-8 strings.
*/
/**
* UCaseMap is an opaque service object for newer ICU case mapping functions.
* Older functions did not use a service object.
* @stable ICU 3.4
*/
struct UCaseMap;
typedef struct UCaseMap UCaseMap; /**< C typedef for struct UCaseMap. @stable ICU 3.4 */
/**
* Open a UCaseMap service object for a locale and a set of options.
* The locale ID and options are preprocessed so that functions using the
* service object need not process them in each call.
*
* @param locale ICU locale ID, used for language-dependent
* upper-/lower-/title-casing according to the Unicode standard.
* Usual semantics: ""=root, NULL=default locale, etc.
* @param options Options bit set, used for case folding and string comparisons.
* Same flags as for u_foldCase(), u_strFoldCase(),
* u_strCaseCompare(), etc.
* Use 0 or U_FOLD_CASE_DEFAULT for default behavior.
* @param pErrorCode Must be a valid pointer to an error code value,
* which must not indicate a failure before the function call.
* @return Pointer to a UCaseMap service object, if successful.
*
* @see U_FOLD_CASE_DEFAULT
* @see U_FOLD_CASE_EXCLUDE_SPECIAL_I
* @see U_TITLECASE_NO_LOWERCASE
* @see U_TITLECASE_NO_BREAK_ADJUSTMENT
* @stable ICU 3.4
*/
U_CAPI UCaseMap * U_EXPORT2
ucasemap_open(const char *locale, uint32_t options, UErrorCode *pErrorCode);
/**
* Close a UCaseMap service object.
* @param csm Object to be closed.
* @stable ICU 3.4
*/
U_CAPI void U_EXPORT2
ucasemap_close(UCaseMap *csm);
#if U_SHOW_CPLUSPLUS_API
U_NAMESPACE_BEGIN
/**
* \class LocalUCaseMapPointer
* "Smart pointer" class, closes a UCaseMap via ucasemap_close().
* For most methods see the LocalPointerBase base class.
*
* @see LocalPointerBase
* @see LocalPointer
* @stable ICU 4.4
*/
U_DEFINE_LOCAL_OPEN_POINTER(LocalUCaseMapPointer, UCaseMap, ucasemap_close);
U_NAMESPACE_END
#endif
/**
* Get the locale ID that is used for language-dependent case mappings.
* @param csm UCaseMap service object.
* @return locale ID
* @stable ICU 3.4
*/
U_CAPI const char * U_EXPORT2
ucasemap_getLocale(const UCaseMap *csm);
/**
* Get the options bit set that is used for case folding and string comparisons.
* @param csm UCaseMap service object.
* @return options bit set
* @stable ICU 3.4
*/
U_CAPI uint32_t U_EXPORT2
ucasemap_getOptions(const UCaseMap *csm);
/**
* Set the locale ID that is used for language-dependent case mappings.
*
* @param csm UCaseMap service object.
* @param locale Locale ID, see ucasemap_open().
* @param pErrorCode Must be a valid pointer to an error code value,
* which must not indicate a failure before the function call.
*
* @see ucasemap_open
* @stable ICU 3.4
*/
U_CAPI void U_EXPORT2
ucasemap_setLocale(UCaseMap *csm, const char *locale, UErrorCode *pErrorCode);
/**
* Set the options bit set that is used for case folding and string comparisons.
*
* @param csm UCaseMap service object.
* @param options Options bit set, see ucasemap_open().
* @param pErrorCode Must be a valid pointer to an error code value,
* which must not indicate a failure before the function call.
*
* @see ucasemap_open
* @stable ICU 3.4
*/
U_CAPI void U_EXPORT2
ucasemap_setOptions(UCaseMap *csm, uint32_t options, UErrorCode *pErrorCode);
#if !UCONFIG_NO_BREAK_ITERATION
/**
* Get the break iterator that is used for titlecasing.
* Do not modify the returned break iterator.
* @param csm UCaseMap service object.
* @return titlecasing break iterator
* @stable ICU 3.8
*/
U_CAPI const UBreakIterator * U_EXPORT2
ucasemap_getBreakIterator(const UCaseMap *csm);
/**
* Set the break iterator that is used for titlecasing.
* The UCaseMap service object releases a previously set break iterator
* and "adopts" this new one, taking ownership of it.
* It will be released in a subsequent call to ucasemap_setBreakIterator()
* or ucasemap_close().
*
* Break iterator operations are not thread-safe. Therefore, titlecasing
* functions use non-const UCaseMap objects. It is not possible to titlecase
* strings concurrently using the same UCaseMap.
*
* @param csm UCaseMap service object.
* @param iterToAdopt Break iterator to be adopted for titlecasing.
* @param pErrorCode Must be a valid pointer to an error code value,
* which must not indicate a failure before the function call.
*
* @see ucasemap_toTitle
* @see ucasemap_utf8ToTitle
* @stable ICU 3.8
*/
U_CAPI void U_EXPORT2
ucasemap_setBreakIterator(UCaseMap *csm, UBreakIterator *iterToAdopt, UErrorCode *pErrorCode);
/**
* Titlecase a UTF-16 string. This function is almost a duplicate of u_strToTitle(),
* except that it takes ucasemap_setOptions() into account and has performance
* advantages from being able to use a UCaseMap object for multiple case mapping
* operations, saving setup time.
*
* 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. (This can be modified with ucasemap_setOptions().)
*
* Note: This function takes a non-const UCaseMap pointer because it will
* open a default break iterator if no break iterator was set yet,
* and effectively call ucasemap_setBreakIterator();
* also because the break iterator is stateful and will be modified during
* the iteration.
*
* The titlecase break iterator can be provided to customize for arbitrary
* styles, using rules and dictionaries beyond the standard iterators.
* 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 must not overlap.
*
* @param csm UCaseMap service object. This pointer is non-const!
* See the note above for details.
* @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 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 NUL-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 length of the result string, if successful - or in case of a buffer overflow,
* in which case it will be greater than destCapacity.
*
* @see u_strToTitle
* @stable ICU 3.8
*/
U_CAPI int32_t U_EXPORT2
ucasemap_toTitle(UCaseMap *csm,
UChar *dest, int32_t destCapacity,
const UChar *src, int32_t srcLength,
UErrorCode *pErrorCode);
#endif // UCONFIG_NO_BREAK_ITERATION
/**
* Lowercase the characters in a UTF-8 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 must not overlap.
*
* @param csm UCaseMap service object.
* @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 src The original string.
* @param srcLength The length of the original string. If -1, then src must be NUL-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 length of the result string, if successful - or in case of a buffer overflow,
* in which case it will be greater than destCapacity.
*
* @see u_strToLower
* @stable ICU 3.4
*/
U_CAPI int32_t U_EXPORT2
ucasemap_utf8ToLower(const UCaseMap *csm,
char *dest, int32_t destCapacity,
const char *src, int32_t srcLength,
UErrorCode *pErrorCode);
/**
* Uppercase the characters in a UTF-8 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 must not overlap.
*
* @param csm UCaseMap service object.
* @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 src The original string.
* @param srcLength The length of the original string. If -1, then src must be NUL-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 length of the result string, if successful - or in case of a buffer overflow,
* in which case it will be greater than destCapacity.
*
* @see u_strToUpper
* @stable ICU 3.4
*/
U_CAPI int32_t U_EXPORT2
ucasemap_utf8ToUpper(const UCaseMap *csm,
char *dest, int32_t destCapacity,
const char *src, int32_t srcLength,
UErrorCode *pErrorCode);
#if !UCONFIG_NO_BREAK_ITERATION
/**
* Titlecase a UTF-8 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. (This can be modified with ucasemap_setOptions().)
*
* Note: This function takes a non-const UCaseMap pointer because it will
* open a default break iterator if no break iterator was set yet,
* and effectively call ucasemap_setBreakIterator();
* also because the break iterator is stateful and will be modified during
* the iteration.
*
* The titlecase break iterator can be provided to customize for arbitrary
* styles, using rules and dictionaries beyond the standard iterators.
* The standard titlecase iterator for the root locale implements the
* algorithm of Unicode TR 21.
*
* This function uses only the setUText(), first(), next() and close() methods of the
* provided break iterator.
*
* The result may be longer or shorter than the original.
* The source string and the destination buffer must not overlap.
*
* @param csm UCaseMap service object. This pointer is non-const!
* See the note above for details.
* @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 src The original string.
* @param srcLength The length of the original string. If -1, then src must be NUL-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 length of the result string, if successful - or in case of a buffer overflow,
* in which case it will be greater than destCapacity.
*
* @see u_strToTitle
* @see U_TITLECASE_NO_LOWERCASE
* @see U_TITLECASE_NO_BREAK_ADJUSTMENT
* @stable ICU 3.8
*/
U_CAPI int32_t U_EXPORT2
ucasemap_utf8ToTitle(UCaseMap *csm,
char *dest, int32_t destCapacity,
const char *src, int32_t srcLength,
UErrorCode *pErrorCode);
#endif
/**
* Case-folds the characters in a UTF-8 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 '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 csm UCaseMap service object.
* @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 src The original string.
* @param srcLength The length of the original string. If -1, then src must be NUL-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 length of the result string, if successful - or in case of a buffer overflow,
* in which case it will be greater than destCapacity.
*
* @see u_strFoldCase
* @see ucasemap_setOptions
* @see U_FOLD_CASE_DEFAULT
* @see U_FOLD_CASE_EXCLUDE_SPECIAL_I
* @stable ICU 3.8
*/
U_CAPI int32_t U_EXPORT2
ucasemap_utf8FoldCase(const UCaseMap *csm,
char *dest, int32_t destCapacity,
const char *src, int32_t srcLength,
UErrorCode *pErrorCode);
#endif
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