// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
*
* Copyright ( C ) 2003 - 2013 , International Business Machines
* Corporation and others . All Rights Reserved .
*
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* file name : uarrsort . h
* encoding : UTF - 8
* tab size : 8 ( not used )
* indentation : 4
*
* created on : 2003 aug04
* created by : Markus W . Scherer
*
* Internal function for sorting arrays .
*/
#ifndef __UARRSORT_H__
#define __UARRSORT_H__
#include "unicode/utypes.h"
U_CDECL_BEGIN
/**
* Function type for comparing two items as part of sorting an array or similar .
* Callback function for uprv_sortArray ( ) .
*
* @ param context Application - specific pointer , passed through by uprv_sortArray ( ) .
* @ param left Pointer to the " left " item .
* @ param right Pointer to the " right " item .
* @ return 32 - bit signed integer comparison result :
* < 0 if left < right
* = = 0 if left = = right
* > 0 if left > right
*
* @ internal
*/
typedef int32_t U_CALLCONV
UComparator(
const void *context,
const void *left,
const void *right);
U_CDECL_END
/**
* Array sorting function .
* Uses a UComparator for comparing array items to each other , and simple
* memory copying to move items .
*
* @ param array The array to be sorted .
* @ param length The number of items in the array .
* @ param itemSize The size in bytes of each array item .
* @ param cmp UComparator function used to compare two items each .
* @ param context Application - specific pointer , passed through to the UComparator .
* @ param sortStable If true , a stable sorting algorithm must be used .
* @ param pErrorCode ICU in / out UErrorCode parameter .
*
* @ internal
*/
U_CAPI
void U_EXPORT2
uprv_sortArray(
void *array, int32_t length, int32_t itemSize,
UComparator *cmp,
const void *context,
UBool sortStable, UErrorCode *pErrorCode);
/**
* Convenience UComparator implementation for uint16_t arrays .
* @ internal
*/
U_CAPI int32_t U_EXPORT2
uprv_uint16Comparator(
const void *context,
const void *left,
const void *right);
/**
* Convenience UComparator implementation for int32_t arrays .
* @ internal
*/
U_CAPI int32_t U_EXPORT2
uprv_int32Comparator(
const void *context,
const void *left,
const void *right);
/**
* Convenience UComparator implementation for uint32_t arrays .
* @ internal
*/
U_CAPI int32_t U_EXPORT2
uprv_uint32Comparator(
const void *context,
const void *left,
const void *right);
/**
* Much like Java Collections . binarySearch ( list , key , comparator ) .
*
* Except : Java documents " If the list contains multiple elements equal to
* the specified object , there is no guarantee which one will be found . "
*
* This version here will return the largest index of any equal item ,
* for use in stable sorting .
*
* @ return the index > = 0 where the item was found :
* the largest such index , if multiple , for stable sorting ;
* or the index < 0 for inserting the item at ~ index in sorted order
*/
U_CAPI int32_t U_EXPORT2
uprv_stableBinarySearch(
char *array, int32_t length,
void *item, int32_t itemSize,
UComparator *cmp,
const void *context);
#endif
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