91 lines
3 KiB
C++
91 lines
3 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
|
|
// License & terms of use: http://www.unicode.org/copyright.html
|
|
/*
|
|
*******************************************************************************
|
|
* Copyright (C) 1997-2011, International Business Machines
|
|
* Corporation and others. All Rights Reserved.
|
|
*******************************************************************************
|
|
* file name: uelement.h
|
|
* encoding: UTF-8
|
|
* tab size: 8 (not used)
|
|
* indentation:4
|
|
*
|
|
* created on: 2011jul04
|
|
* created by: Markus W. Scherer
|
|
*
|
|
* Common definitions for UHashTable and UVector.
|
|
* UHashTok moved here from uhash.h and renamed UElement.
|
|
* This allows users of UVector to avoid the confusing #include of uhash.h.
|
|
* uhash.h aliases UElement to UHashTok,
|
|
* so that we need not change all of its code and its users.
|
|
*/
|
|
|
|
#ifndef __UELEMENT_H__
|
|
#define __UELEMENT_H__
|
|
|
|
#include "unicode/utypes.h"
|
|
|
|
U_CDECL_BEGIN
|
|
|
|
/**
|
|
* A UVector element, or a key or value within a UHashtable.
|
|
* It may be either a 32-bit integral value or an opaque void* pointer.
|
|
* The void* pointer may be smaller than 32 bits (e.g. 24 bits)
|
|
* or may be larger (e.g. 64 bits).
|
|
*
|
|
* Because a UElement is the size of a native pointer or a 32-bit
|
|
* integer, we pass it around by value.
|
|
*/
|
|
union UElement {
|
|
void* pointer;
|
|
int32_t integer;
|
|
};
|
|
typedef union UElement UElement;
|
|
|
|
/**
|
|
* An element-equality (boolean) comparison function.
|
|
* @param e1 An element (object or integer)
|
|
* @param e2 An element (object or integer)
|
|
* @return true if the two elements are equal.
|
|
*/
|
|
typedef UBool U_CALLCONV UElementsAreEqual(const UElement e1, const UElement e2);
|
|
|
|
/**
|
|
* An element sorting (three-way) comparison function.
|
|
* @param e1 An element (object or integer)
|
|
* @param e2 An element (object or integer)
|
|
* @return 0 if the two elements are equal, -1 if e1 is < e2, or +1 if e1 is > e2.
|
|
*/
|
|
typedef int8_t U_CALLCONV UElementComparator(UElement e1, UElement e2);
|
|
|
|
/**
|
|
* An element assignment function. It may copy an integer, copy
|
|
* a pointer, or clone a pointer, as appropriate.
|
|
* @param dst The element to be assigned to
|
|
* @param src The element to assign from
|
|
*/
|
|
typedef void U_CALLCONV UElementAssigner(UElement *dst, UElement *src);
|
|
|
|
U_CDECL_END
|
|
|
|
/**
|
|
* Comparator function for UnicodeString* keys. Implements UElementsAreEqual.
|
|
* @param key1 The string for comparison
|
|
* @param key2 The string for comparison
|
|
* @return true if key1 and key2 are equal, return false otherwise.
|
|
*/
|
|
U_CAPI UBool U_EXPORT2
|
|
uhash_compareUnicodeString(const UElement key1, const UElement key2);
|
|
|
|
/**
|
|
* Comparator function for UnicodeString* keys (case insensitive).
|
|
* Make sure to use together with uhash_hashCaselessUnicodeString.
|
|
* Implements UElementsAreEqual.
|
|
* @param key1 The string for comparison
|
|
* @param key2 The string for comparison
|
|
* @return true if key1 and key2 are equal, return false otherwise.
|
|
*/
|
|
U_CAPI UBool U_EXPORT2
|
|
uhash_compareCaselessUnicodeString(const UElement key1, const UElement key2);
|
|
|
|
#endif /* __UELEMENT_H__ */
|