name : ulistformatter.h // © 2016 and later: Unicode, Inc. and others. // License & terms of use: http://www.unicode.org/copyright.html /* ***************************************************************************************** * Copyright (C) 2015-2016, International Business Machines * Corporation and others. All Rights Reserved. ***************************************************************************************** */ #ifndef ULISTFORMATTER_H #define ULISTFORMATTER_H #include "unicode/utypes.h" #if !UCONFIG_NO_FORMATTING #include "unicode/uformattedvalue.h" #if U_SHOW_CPLUSPLUS_API #include "unicode/localpointer.h" #endif // U_SHOW_CPLUSPLUS_API /** * \file * \brief C API: Format a list in a locale-appropriate way. * * A UListFormatter is used to format a list of items in a locale-appropriate way, * using data from CLDR. * Example: Input data ["Alice", "Bob", "Charlie", "Delta"] will be formatted * as "Alice, Bob, Charlie, and Delta" in English. */ /** * Opaque UListFormatter object for use in C * @stable ICU 55 */ struct UListFormatter; typedef struct UListFormatter UListFormatter; /**< C typedef for struct UListFormatter. @stable ICU 55 */ struct UFormattedList; /** * Opaque struct to contain the results of a UListFormatter operation. * @stable ICU 64 */ typedef struct UFormattedList UFormattedList; /** * FieldPosition and UFieldPosition selectors for format fields * defined by ListFormatter. * @stable ICU 63 */ typedef enum UListFormatterField { /** * The literal text in the result which came from the resources. * @stable ICU 63 */ ULISTFMT_LITERAL_FIELD, /** * The element text in the result which came from the input strings. * @stable ICU 63 */ ULISTFMT_ELEMENT_FIELD } UListFormatterField; /** * Type of meaning expressed by the list. * * @stable ICU 67 */ typedef enum UListFormatterType { /** * Conjunction formatting, e.g. "Alice, Bob, Charlie, and Delta". * * @stable ICU 67 */ ULISTFMT_TYPE_AND, /** * Disjunction (or alternative, or simply one of) formatting, e.g. * "Alice, Bob, Charlie, or Delta". * * @stable ICU 67 */ ULISTFMT_TYPE_OR, /** * Formatting of a list of values with units, e.g. "5 pounds, 12 ounces". * * @stable ICU 67 */ ULISTFMT_TYPE_UNITS } UListFormatterType; /** * Verbosity level of the list patterns. * * @stable ICU 67 */ typedef enum UListFormatterWidth { /** * Use list formatting with full words (no abbreviations) when possible. * * @stable ICU 67 */ ULISTFMT_WIDTH_WIDE, /** * Use list formatting of typical length. * @stable ICU 67 */ ULISTFMT_WIDTH_SHORT, /** * Use list formatting of the shortest possible length. * @stable ICU 67 */ ULISTFMT_WIDTH_NARROW, } UListFormatterWidth; /** * Open a new UListFormatter object using the rules for a given locale. * The object will be initialized with AND type and WIDE width. * * @param locale * The locale whose rules should be used; may be NULL for * default locale. * @param status * A pointer to a standard ICU UErrorCode (input/output parameter). * Its input value must pass the U_SUCCESS() test, or else the * function returns immediately. The caller should check its output * value with U_FAILURE(), or use with function chaining (see User * Guide for details). * @return * A pointer to a UListFormatter object for the specified locale, * or NULL if an error occurred. * @stable ICU 55 */ U_CAPI UListFormatter* U_EXPORT2 ulistfmt_open(const char* locale, UErrorCode* status); /** * Open a new UListFormatter object appropriate for the given locale, list type, * and style. * * @param locale * The locale whose rules should be used; may be NULL for * default locale. * @param type * The type of list formatting to use. * @param width * The width of formatting to use. * @param status * A pointer to a standard ICU UErrorCode (input/output parameter). * Its input value must pass the U_SUCCESS() test, or else the * function returns immediately. The caller should check its output * value with U_FAILURE(), or use with function chaining (see User * Guide for details). * @return * A pointer to a UListFormatter object for the specified locale, * or NULL if an error occurred. * @stable ICU 67 */ U_CAPI UListFormatter* U_EXPORT2 ulistfmt_openForType(const char* locale, UListFormatterType type, UListFormatterWidth width, UErrorCode* status); /** * Close a UListFormatter object. Once closed it may no longer be used. * @param listfmt * The UListFormatter object to close. * @stable ICU 55 */ U_CAPI void U_EXPORT2 ulistfmt_close(UListFormatter *listfmt); /** * Creates an object to hold the result of a UListFormatter * operation. The object can be used repeatedly; it is cleared whenever * passed to a format function. * * @param ec Set if an error occurs. * @return A pointer needing ownership. * @stable ICU 64 */ U_CAPI UFormattedList* U_EXPORT2 ulistfmt_openResult(UErrorCode* ec); /** * Returns a representation of a UFormattedList as a UFormattedValue, * which can be subsequently passed to any API requiring that type. * * The returned object is owned by the UFormattedList and is valid * only as long as the UFormattedList is present and unchanged in memory. * * You can think of this method as a cast between types. * * When calling ufmtval_nextPosition(): * The fields are returned from start to end. The special field category * UFIELD_CATEGORY_LIST_SPAN is used to indicate which argument * was inserted at the given position. The span category will * always occur before the corresponding instance of UFIELD_CATEGORY_LIST * in the ufmtval_nextPosition() iterator. * * @param uresult The object containing the formatted string. * @param ec Set if an error occurs. * @return A UFormattedValue owned by the input object. * @stable ICU 64 */ U_CAPI const UFormattedValue* U_EXPORT2 ulistfmt_resultAsValue(const UFormattedList* uresult, UErrorCode* ec); /** * Releases the UFormattedList created by ulistfmt_openResult(). * * @param uresult The object to release. * @stable ICU 64 */ U_CAPI void U_EXPORT2 ulistfmt_closeResult(UFormattedList* uresult); #if U_SHOW_CPLUSPLUS_API U_NAMESPACE_BEGIN /** * \class LocalUListFormatterPointer * "Smart pointer" class, closes a UListFormatter via ulistfmt_close(). * For most methods see the LocalPointerBase base class. * * @see LocalPointerBase * @see LocalPointer * @stable ICU 55 */ U_DEFINE_LOCAL_OPEN_POINTER(LocalUListFormatterPointer, UListFormatter, ulistfmt_close); /** * \class LocalUFormattedListPointer * "Smart pointer" class, closes a UFormattedList via ulistfmt_closeResult(). * For most methods see the LocalPointerBase base class. * * @see LocalPointerBase * @see LocalPointer * @stable ICU 64 */ U_DEFINE_LOCAL_OPEN_POINTER(LocalUFormattedListPointer, UFormattedList, ulistfmt_closeResult); U_NAMESPACE_END #endif /** * Formats a list of strings using the conventions established for the * UListFormatter object. * @param listfmt * The UListFormatter object specifying the list conventions. * @param strings * An array of pointers to UChar strings; the array length is * specified by stringCount. Must be non-NULL if stringCount > 0. * @param stringLengths * An array of string lengths corresponding to the strings[] * parameter; any individual length value may be negative to indicate * that the corresponding strings[] entry is 0-terminated, or * stringLengths itself may be NULL if all of the strings are * 0-terminated. If non-NULL, the stringLengths array must have * stringCount entries. * @param stringCount * the number of entries in strings[], and the number of entries * in the stringLengths array if it is not NULL. Must be >= 0. * @param result * A pointer to a buffer to receive the formatted list. * @param resultCapacity * The maximum size of result. * @param status * A pointer to a standard ICU UErrorCode (input/output parameter). * Its input value must pass the U_SUCCESS() test, or else the * function returns immediately. The caller should check its output * value with U_FAILURE(), or use with function chaining (see User * Guide for details). * @return * The total buffer size needed; if greater than resultLength, the * output was truncated. May be <=0 if unable to determine the * total buffer size needed (e.g. for illegal arguments). * @stable ICU 55 */ U_CAPI int32_t U_EXPORT2 ulistfmt_format(const UListFormatter* listfmt, const UChar* const strings[], const int32_t * stringLengths, int32_t stringCount, UChar* result, int32_t resultCapacity, UErrorCode* status); /** * Formats a list of strings to a UFormattedList, which exposes more * information than the string exported by ulistfmt_format(). * * @param listfmt * The UListFormatter object specifying the list conventions. * @param strings * An array of pointers to UChar strings; the array length is * specified by stringCount. Must be non-NULL if stringCount > 0. * @param stringLengths * An array of string lengths corresponding to the strings[] * parameter; any individual length value may be negative to indicate * that the corresponding strings[] entry is 0-terminated, or * stringLengths itself may be NULL if all of the strings are * 0-terminated. If non-NULL, the stringLengths array must have * stringCount entries. * @param stringCount * the number of entries in strings[], and the number of entries * in the stringLengths array if it is not NULL. Must be >= 0. * @param uresult * The object in which to store the result of the list formatting * operation. See ulistfmt_openResult(). * @param status * Error code set if an error occurred during formatting. * @stable ICU 64 */ U_CAPI void U_EXPORT2 ulistfmt_formatStringsToResult( const UListFormatter* listfmt, const UChar* const strings[], const int32_t * stringLengths, int32_t stringCount, UFormattedList* uresult, UErrorCode* status); #endif /* #if !UCONFIG_NO_FORMATTING */ #endif