67 lines
2.2 KiB
C
67 lines
2.2 KiB
C
/*
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*******************************************************************************
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*
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* Copyright (C) 1999-2001, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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*******************************************************************************
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* file name: ucol_wgt.h
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* encoding: US-ASCII
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* tab size: 8 (not used)
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* indentation:4
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*
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* created on: 2001mar08
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* created by: Markus W. Scherer
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*/
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#ifndef UCOL_WGT_H
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#define UCOL_WGT_H
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#include "ucol_imp.h"
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/* definitions for CE weights */
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typedef struct WeightRange {
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uint32_t start, end;
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int32_t length, count;
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int32_t length2;
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uint32_t count2;
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} WeightRange;
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/**
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* Determine heuristically
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* what ranges to use for a given number of weights between (excluding)
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* two limits.
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*
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* @param lowerLimit A collation element weight; the ranges will be filled to cover
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* weights greater than this one.
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* @param upperLimit A collation element weight; the ranges will be filled to cover
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* weights less than this one.
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* @param n The number of collation element weights w necessary such that
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* lowerLimit<w<upperLimit in lexical order.
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* @param maxByte The highest valid byte value.
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* @param ranges An array that is filled in with one or more ranges to cover
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* n weights between the limits.
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* @return number of ranges, 0 if it is not possible to fit n elements between the limits
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*/
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U_CFUNC int32_t
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ucol_allocWeights(uint32_t lowerLimit, uint32_t upperLimit,
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uint32_t n,
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uint32_t maxByte,
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WeightRange ranges[7]);
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/**
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* Given a set of ranges calculated by ucol_allocWeights(),
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* iterate through the weights.
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* The ranges are modified to keep the current iteration state.
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*
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* @param ranges The array of ranges that ucol_allocWeights() filled in.
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* The ranges are modified.
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* @param pRangeCount The number of ranges. It will be decremented when necessary.
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* @return The next weight in the ranges, or 0xffffffff if there is none left.
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*/
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U_CFUNC uint32_t
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ucol_nextWeight(WeightRange ranges[], int32_t *pRangeCount);
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#endif
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