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Diffstat (limited to 'Build/source/libs/icu/icu-xetex/common/unicode/uenum.h')
| -rw-r--r-- | Build/source/libs/icu/icu-xetex/common/unicode/uenum.h | 134 |
1 files changed, 134 insertions, 0 deletions
diff --git a/Build/source/libs/icu/icu-xetex/common/unicode/uenum.h b/Build/source/libs/icu/icu-xetex/common/unicode/uenum.h new file mode 100644 index 00000000000..ff9b29997e9 --- /dev/null +++ b/Build/source/libs/icu/icu-xetex/common/unicode/uenum.h @@ -0,0 +1,134 @@ +/* +******************************************************************************* +* +* Copyright (C) 2002-2005, International Business Machines +* Corporation and others. All Rights Reserved. +* +******************************************************************************* +* file name: uenum.h +* encoding: US-ASCII +* tab size: 8 (not used) +* indentation:2 +* +* created on: 2002jul08 +* created by: Vladimir Weinstein +*/ + +#ifndef __UENUM_H +#define __UENUM_H + +#include "unicode/utypes.h" + +/** + * \file + * \brief C API: String Enumeration + */ + +/** + * An enumeration object. + * For usage in C programs. + * @stable ICU 2.2 + */ +struct UEnumeration; +/** structure representing an enumeration object instance @stable ICU 2.2 */ +typedef struct UEnumeration UEnumeration; + +/** + * Disposes of resources in use by the iterator. If en is NULL, + * does nothing. After this call, any char* or UChar* pointer + * returned by uenum_unext() or uenum_next() is invalid. + * @param en UEnumeration structure pointer + * @stable ICU 2.2 + */ +U_STABLE void U_EXPORT2 +uenum_close(UEnumeration* en); + +/** + * Returns the number of elements that the iterator traverses. If + * the iterator is out-of-sync with its service, status is set to + * U_ENUM_OUT_OF_SYNC_ERROR. + * This is a convenience function. It can end up being very + * expensive as all the items might have to be pre-fetched (depending + * on the type of data being traversed). Use with caution and only + * when necessary. + * @param en UEnumeration structure pointer + * @param status error code, can be U_ENUM_OUT_OF_SYNC_ERROR if the + * iterator is out of sync. + * @return number of elements in the iterator + * @stable ICU 2.2 + */ +U_STABLE int32_t U_EXPORT2 +uenum_count(UEnumeration* en, UErrorCode* status); + +/** + * Returns the next element in the iterator's list. If there are + * no more elements, returns NULL. If the iterator is out-of-sync + * with its service, status is set to U_ENUM_OUT_OF_SYNC_ERROR and + * NULL is returned. If the native service string is a char* string, + * it is converted to UChar* with the invariant converter. + * The result is terminated by (UChar)0. + * @param en the iterator object + * @param resultLength pointer to receive the length of the result + * (not including the terminating \\0). + * If the pointer is NULL it is ignored. + * @param status the error code, set to U_ENUM_OUT_OF_SYNC_ERROR if + * the iterator is out of sync with its service. + * @return a pointer to the string. The string will be + * zero-terminated. The return pointer is owned by this iterator + * and must not be deleted by the caller. The pointer is valid + * until the next call to any uenum_... method, including + * uenum_next() or uenum_unext(). When all strings have been + * traversed, returns NULL. + * @stable ICU 2.2 + */ +U_STABLE const UChar* U_EXPORT2 +uenum_unext(UEnumeration* en, + int32_t* resultLength, + UErrorCode* status); + +/** + * Returns the next element in the iterator's list. If there are + * no more elements, returns NULL. If the iterator is out-of-sync + * with its service, status is set to U_ENUM_OUT_OF_SYNC_ERROR and + * NULL is returned. If the native service string is a UChar* + * string, it is converted to char* with the invariant converter. + * The result is terminated by (char)0. If the conversion fails + * (because a character cannot be converted) then status is set to + * U_INVARIANT_CONVERSION_ERROR and the return value is undefined + * (but non-NULL). + * @param en the iterator object + * @param resultLength pointer to receive the length of the result + * (not including the terminating \\0). + * If the pointer is NULL it is ignored. + * @param status the error code, set to U_ENUM_OUT_OF_SYNC_ERROR if + * the iterator is out of sync with its service. Set to + * U_INVARIANT_CONVERSION_ERROR if the underlying native string is + * UChar* and conversion to char* with the invariant converter + * fails. This error pertains only to current string, so iteration + * might be able to continue successfully. + * @return a pointer to the string. The string will be + * zero-terminated. The return pointer is owned by this iterator + * and must not be deleted by the caller. The pointer is valid + * until the next call to any uenum_... method, including + * uenum_next() or uenum_unext(). When all strings have been + * traversed, returns NULL. + * @stable ICU 2.2 + */ +U_STABLE const char* U_EXPORT2 +uenum_next(UEnumeration* en, + int32_t* resultLength, + UErrorCode* status); + +/** + * Resets the iterator to the current list of service IDs. This + * re-establishes sync with the service and rewinds the iterator + * to start at the first element. + * @param en the iterator object + * @param status the error code, set to U_ENUM_OUT_OF_SYNC_ERROR if + * the iterator is out of sync with its service. + * @stable ICU 2.2 + */ +U_STABLE void U_EXPORT2 +uenum_reset(UEnumeration* en, UErrorCode* status); + +#endif |