projects / apple / icu.git / blame
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|---|---|---|
| b75a7d8f A |
1 | /* |
| 2 | ******************************************************************************* | |
| 3 | * | |
| 4 | * Copyright (C) 1999-2001, International Business Machines | |
| 5 | * Corporation and others. All Rights Reserved. | |
| 6 | * | |
| 7 | ******************************************************************************* | |
| 8 | * file name: ucol_wgt.h | |
| 9 | * encoding: US-ASCII | |
| 10 | * tab size: 8 (not used) | |
| 11 | * indentation:4 | |
| 12 | * | |
| 13 | * created on: 2001mar08 | |
| 14 | * created by: Markus W. Scherer | |
| 15 | */ | |
| 16 | ||
| 17 | #ifndef UCOL_WGT_H | |
| 18 | #define UCOL_WGT_H | |
| 19 | ||
| 20 | #include "unicode/utypes.h" | |
| 21 | ||
| 22 | #if !UCONFIG_NO_COLLATION | |
| 23 | ||
| 24 | #include "ucol_imp.h" | |
| 25 | ||
| 26 | /* definitions for CE weights */ | |
| 27 | ||
| 28 | typedef struct WeightRange { | |
| 29 | uint32_t start, end; | |
| 30 | int32_t length, count; | |
| 31 | int32_t length2; | |
| 32 | uint32_t count2; | |
| 33 | } WeightRange; | |
| 34 | ||
| 35 | /** | |
| 36 | * Determine heuristically | |
| 37 | * what ranges to use for a given number of weights between (excluding) | |
| 38 | * two limits. | |
| 39 | * | |
| 40 | * @param lowerLimit A collation element weight; the ranges will be filled to cover | |
| 41 | * weights greater than this one. | |
| 42 | * @param upperLimit A collation element weight; the ranges will be filled to cover | |
| 43 | * weights less than this one. | |
| 44 | * @param n The number of collation element weights w necessary such that | |
| 45 | * lowerLimit<w<upperLimit in lexical order. | |
| 46 | * @param maxByte The highest valid byte value. | |
| 47 | * @param ranges An array that is filled in with one or more ranges to cover | |
| 48 | * n weights between the limits. | |
| 49 | * @return number of ranges, 0 if it is not possible to fit n elements between the limits | |
| 50 | */ | |
| 51 | U_CFUNC int32_t | |
| 52 | ucol_allocWeights(uint32_t lowerLimit, uint32_t upperLimit, | |
| 53 | uint32_t n, | |
| 54 | uint32_t maxByte, | |
| 55 | WeightRange ranges[7]); | |
| 56 | ||
| 57 | /** | |
| 58 | * Given a set of ranges calculated by ucol_allocWeights(), | |
| 59 | * iterate through the weights. | |
| 60 | * The ranges are modified to keep the current iteration state. | |
| 61 | * | |
| 62 | * @param ranges The array of ranges that ucol_allocWeights() filled in. | |
| 63 | * The ranges are modified. | |
| 64 | * @param pRangeCount The number of ranges. It will be decremented when necessary. | |
| 65 | * @return The next weight in the ranges, or 0xffffffff if there is none left. | |
| 66 | */ | |
| 67 | U_CFUNC uint32_t | |
| 68 | ucol_nextWeight(WeightRange ranges[], int32_t *pRangeCount); | |
| 69 | ||
| 70 | #endif /* #if !UCONFIG_NO_COLLATION */ | |
| 71 | ||
| 72 | #endif |