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+// Copyright (C) 2016 and later: Unicode, Inc. and others.
+// License & terms of use: http://www.unicode.org/copyright.html
+/*
+*******************************************************************************
+*
+* Copyright (C) 2002-2006, International Business Machines
+* Corporation and others. All Rights Reserved.
+*
+*******************************************************************************
+* file name: uenumimp.h
+* encoding: US-ASCII
+* tab size: 8 (not used)
+* indentation:2
+*
+* created on: 2002jul08
+* created by: Vladimir Weinstein
+*/
+
+#ifndef __UENUMIMP_H
+#define __UENUMIMP_H
+
+#include "unicode/uenum.h"
+
+U_CDECL_BEGIN
+
+/**
+ * following are the type declarations for
+ * implementations of APIs. If any of these
+ * functions are NULL, U_UNSUPPORTED_ERROR
+ * is returned. If close is NULL, the enumeration
+ * object is going to be released.
+ * Initial error checking is done in the body
+ * of API function, so the implementations
+ * need not to check the initial error condition.
+ */
+
+/**
+ * Function type declaration for uenum_close().
+ *
+ * This function should cleanup the enumerator object
+ *
+ * @param en enumeration to be closed
+ */
+typedef void U_CALLCONV
+UEnumClose(UEnumeration *en);
+
+/**
+ * Function type declaration for uenum_count().
+ *
+ * This function should count the number of elements
+ * in this enumeration
+ *
+ * @param en enumeration to be counted
+ * @param status pointer to UErrorCode variable
+ * @return number of elements in enumeration
+ */
+typedef int32_t U_CALLCONV
+UEnumCount(UEnumeration *en, UErrorCode *status);
+
+/**
+ * Function type declaration for uenum_unext().
+ *
+ * This function returns the next element as a UChar *,
+ * or NULL after all elements haven been enumerated.
+ *
+ * @param en enumeration
+ * @param resultLength pointer to result length
+ * @param status pointer to UErrorCode variable
+ * @return next element as UChar *,
+ * or NULL after all elements haven been enumerated
+ */
+typedef const UChar* U_CALLCONV
+UEnumUNext(UEnumeration* en,
+ int32_t* resultLength,
+ UErrorCode* status);
+
+/**
+ * Function type declaration for uenum_next().
+ *
+ * This function returns the next element as a char *,
+ * or NULL after all elements haven been enumerated.
+ *
+ * @param en enumeration
+ * @param resultLength pointer to result length
+ * @param status pointer to UErrorCode variable
+ * @return next element as char *,
+ * or NULL after all elements haven been enumerated
+ */
+typedef const char* U_CALLCONV
+UEnumNext(UEnumeration* en,
+ int32_t* resultLength,
+ UErrorCode* status);
+
+/**
+ * Function type declaration for uenum_reset().
+ *
+ * This function should reset the enumeration
+ * object
+ *
+ * @param en enumeration
+ * @param status pointer to UErrorCode variable
+ */
+typedef void U_CALLCONV
+UEnumReset(UEnumeration* en,
+ UErrorCode* status);
+
+
+struct UEnumeration {
+ /* baseContext. For the base class only. Don't touch! */
+ void *baseContext;
+
+ /* context. Use it for what you need */
+ void *context;
+
+ /**
+ * these are functions that will
+ * be used for APIs
+ */
+ /* called from uenum_close */
+ UEnumClose *close;
+ /* called from uenum_count */
+ UEnumCount *count;
+ /* called from uenum_unext */
+ UEnumUNext *uNext;
+ /* called from uenum_next */
+ UEnumNext *next;
+ /* called from uenum_reset */
+ UEnumReset *reset;
+};
+
+U_CDECL_END
+
+/* This is the default implementation for uenum_unext().
+ * It automatically converts the char * string to UChar *.
+ * Don't call this directly. This is called internally by uenum_unext
+ * when a UEnumeration is defined with 'uNext' pointing to this
+ * function.
+ */
+U_CAPI const UChar* U_EXPORT2
+uenum_unextDefault(UEnumeration* en,
+ int32_t* resultLength,
+ UErrorCode* status);
+
+/* This is the default implementation for uenum_next().
+ * It automatically converts the UChar * string to char *.
+ * Don't call this directly. This is called internally by uenum_next
+ * when a UEnumeration is defined with 'next' pointing to this
+ * function.
+ */
+U_CAPI const char* U_EXPORT2
+uenum_nextDefault(UEnumeration* en,
+ int32_t* resultLength,
+ UErrorCode* status);
+
+#endif