472 lines
14 KiB
C++
472 lines
14 KiB
C++
/*
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*******************************************************************************
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*
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* Copyright (C) 2002, 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: uset.c
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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: 2002mar07
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* created by: Markus W. Scherer
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*
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* The serialized structure, the array of range limits, is
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* the same as in UnicodeSet, except that the HIGH value is not stored.
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*
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* There are functions to efficiently serialize a USet into an array of uint16_t
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* and functions to use such a serialized form efficiently without
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* instantiating a new USet.
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*/
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#include "unicode/utypes.h"
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#include "unicode/uobject.h"
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#include "unicode/uset.h"
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#include "unicode/uniset.h"
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#include "cmemory.h"
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U_CAPI USet* U_EXPORT2
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uset_open(UChar32 start, UChar32 end) {
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return (USet*) new UnicodeSet(start, end);
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}
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U_CAPI USet* U_EXPORT2
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uset_openPattern(const UChar* pattern, int32_t patternLength,
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UErrorCode* ec) {
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UnicodeString pat(patternLength==-1, pattern, patternLength);
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UnicodeSet* set = new UnicodeSet(pat, *ec);
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if (U_FAILURE(*ec)) {
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delete set;
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set = NULL;
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}
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return (USet*) set;
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}
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U_CAPI void U_EXPORT2
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uset_close(USet* set) {
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delete (UnicodeSet*) set;
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}
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U_CAPI int32_t U_EXPORT2
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uset_toPattern(const USet* set,
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UChar* result, int32_t resultCapacity,
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UBool escapeUnprintable,
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UErrorCode* ec) {
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UnicodeString pat;
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((const UnicodeSet*) set)->toPattern(pat, escapeUnprintable);
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return pat.extract(result, resultCapacity, *ec);
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}
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U_CAPI void U_EXPORT2
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uset_add(USet* set, UChar32 c) {
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((UnicodeSet*) set)->add(c);
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}
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U_CAPI void U_EXPORT2
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uset_addString(USet* set, const UChar* str, int32_t strLen) {
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UnicodeString s(strLen==-1, str, strLen);
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((UnicodeSet*) set)->add(s);
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}
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U_CAPI void U_EXPORT2
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uset_remove(USet* set, UChar32 c) {
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((UnicodeSet*) set)->remove(c);
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}
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U_CAPI void U_EXPORT2
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uset_removeString(USet* set, const UChar* str, int32_t strLen) {
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UnicodeString s(strLen==-1, str, strLen);
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((UnicodeSet*) set)->remove(s);
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}
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U_CAPI void U_EXPORT2
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uset_complement(USet* set) {
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((UnicodeSet*) set)->complement();
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}
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U_CAPI void U_EXPORT2
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uset_clear(USet* set) {
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((UnicodeSet*) set)->clear();
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}
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U_CAPI UBool U_EXPORT2
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uset_isEmpty(const USet* set) {
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return ((const UnicodeSet*) set)->isEmpty();
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}
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U_CAPI UBool U_EXPORT2
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uset_contains(const USet* set, UChar32 c) {
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return ((const UnicodeSet*) set)->contains(c);
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}
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U_CAPI UBool U_EXPORT2
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uset_containsString(const USet* set, const UChar* str, int32_t strLen) {
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UnicodeString s(strLen==-1, str, strLen);
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return ((const UnicodeSet*) set)->contains(s);
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}
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U_CAPI int32_t U_EXPORT2
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uset_size(const USet* set) {
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return ((const UnicodeSet*) set)->size();
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}
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U_NAMESPACE_BEGIN
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/**
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* This class only exists to provide access to the UnicodeSet private
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* USet support API. Declaring a class a friend is more portable than
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* trying to declare extern "C" functions as friends.
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*/
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class USetAccess : public UObject {
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public:
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// Try to have the compiler inline these
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inline static int32_t getStringCount(const UnicodeSet& set) {
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return set.getStringCount();
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}
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inline static const UnicodeString* getString(const UnicodeSet& set,
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int32_t i) {
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return set.getString(i);
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}
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};
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U_NAMESPACE_END
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U_CAPI int32_t U_EXPORT2
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uset_getItemCount(const USet* uset) {
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const UnicodeSet& set = *(const UnicodeSet*)uset;
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return set.getRangeCount() + USetAccess::getStringCount(set);
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}
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U_CAPI int32_t U_EXPORT2
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uset_getItem(const USet* uset, int32_t itemIndex,
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UChar32* start, UChar32* end,
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UChar* str, int32_t strCapacity,
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UErrorCode* ec) {
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if (U_FAILURE(*ec)) return 0;
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const UnicodeSet& set = *(const UnicodeSet*)uset;
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if ((uint32_t) itemIndex < (uint32_t) set.getRangeCount()) {
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*start = set.getRangeStart(itemIndex);
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*end = set.getRangeEnd(itemIndex);
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return 0;
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} else {
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itemIndex -= set.getRangeCount();
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if ((uint32_t) itemIndex < (uint32_t) USetAccess::getStringCount(set)) {
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const UnicodeString* s = USetAccess::getString(set, itemIndex);
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return s->extract(str, strCapacity, *ec);
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}
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}
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*ec = U_ILLEGAL_ARGUMENT_ERROR;
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return -1;
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}
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//U_CAPI int32_t U_EXPORT2
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//uset_getRangeCount(const USet* set) {
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// return ((const UnicodeSet*) set)->getRangeCount();
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//}
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//
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//U_CAPI UBool U_EXPORT2
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//uset_getRange(const USet* set, int32_t rangeIndex,
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// UChar32* pStart, UChar32* pEnd) {
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// if ((uint32_t) rangeIndex >= (uint32_t) uset_getRangeCount(set)) {
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// return FALSE;
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// }
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// const UnicodeSet* us = (const UnicodeSet*) set;
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// *pStart = us->getRangeStart(rangeIndex);
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// *pEnd = us->getRangeEnd(rangeIndex);
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// return TRUE;
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//}
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/*
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* Serialize a USet into 16-bit units.
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* Store BMP code points as themselves with one 16-bit unit each.
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*
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* Important: the code points in the array are in ascending order,
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* therefore all BMP code points precede all supplementary code points.
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*
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* Store each supplementary code point in 2 16-bit units,
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* simply with higher-then-lower 16-bit halfs.
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*
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* Precede the entire list with the length.
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* If there are supplementary code points, then set bit 15 in the length
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* and add the bmpLength between it and the array.
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*
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* In other words:
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* - all BMP: (length=bmpLength) BMP, .., BMP
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* - some supplementary: (length|0x8000) (bmpLength<length) BMP, .., BMP, supp-high, supp-low, ..
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*/
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U_CAPI int32_t U_EXPORT2
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uset_serialize(const USet* set, uint16_t* dest, int32_t destCapacity, UErrorCode* ec) {
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if (ec==NULL || U_FAILURE(*ec)) {
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return 0;
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}
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return ((const UnicodeSet*) set)->serialize(dest, destCapacity,* ec);
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}
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U_CAPI UBool U_EXPORT2
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uset_getSerializedSet(USerializedSet* fillSet, const uint16_t* src, int32_t srcLength) {
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int32_t length;
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if(fillSet==NULL) {
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return FALSE;
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}
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if(src==NULL || srcLength<=0) {
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fillSet->length=fillSet->bmpLength=0;
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return FALSE;
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}
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length=*src++;
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if(length&0x8000) {
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/* there are supplementary values */
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length&=0x7fff;
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if(srcLength<(2+length)) {
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fillSet->length=fillSet->bmpLength=0;
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return FALSE;
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}
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fillSet->bmpLength=*src++;
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} else {
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/* only BMP values */
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if(srcLength<(1+length)) {
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fillSet->length=fillSet->bmpLength=0;
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return FALSE;
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}
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fillSet->bmpLength=length;
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}
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fillSet->array=src;
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fillSet->length=length;
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return TRUE;
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}
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U_CAPI void U_EXPORT2
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uset_setSerializedToOne(USerializedSet* fillSet, UChar32 c) {
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if(fillSet==NULL || (uint32_t)c>0x10ffff) {
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return;
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}
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fillSet->array=fillSet->staticArray;
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if(c<0xffff) {
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fillSet->bmpLength=fillSet->length=2;
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fillSet->staticArray[0]=(uint16_t)c;
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fillSet->staticArray[1]=(uint16_t)c+1;
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} else if(c==0xffff) {
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fillSet->bmpLength=1;
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fillSet->length=3;
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fillSet->staticArray[0]=0xffff;
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fillSet->staticArray[1]=1;
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fillSet->staticArray[2]=0;
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} else if(c<0x10ffff) {
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fillSet->bmpLength=0;
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fillSet->length=4;
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fillSet->staticArray[0]=(uint16_t)(c>>16);
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fillSet->staticArray[1]=(uint16_t)c;
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++c;
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fillSet->staticArray[2]=(uint16_t)(c>>16);
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fillSet->staticArray[3]=(uint16_t)c;
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} else /* c==0x10ffff */ {
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fillSet->bmpLength=0;
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fillSet->length=2;
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fillSet->staticArray[0]=0x10;
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fillSet->staticArray[1]=0xffff;
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}
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}
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U_CAPI UBool U_EXPORT2
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uset_serializedContains(const USerializedSet* set, UChar32 c) {
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const uint16_t* array;
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if(set==NULL || (uint32_t)c>0x10ffff) {
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return FALSE;
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}
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array=set->array;
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if(c<=0xffff) {
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/* find c in the BMP part */
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int32_t i, bmpLength=set->bmpLength;
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for(i=0; i<bmpLength && (uint16_t)c>=array[i]; ++i) {}
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return (UBool)(i&1);
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} else {
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/* find c in the supplementary part */
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int32_t i, length=set->length;
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uint16_t high=(uint16_t)(c>>16), low=(uint16_t)c;
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for(i=set->bmpLength;
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i<length && (high>array[i] || (high==array[i] && low>=array[i+1]));
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i+=2) {}
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/* count pairs of 16-bit units even per BMP and check if the number of pairs is odd */
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return (UBool)(((i+set->bmpLength)&2)!=0);
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}
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}
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U_CAPI int32_t U_EXPORT2
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uset_getSerializedRangeCount(const USerializedSet* set) {
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if(set==NULL) {
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return 0;
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}
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return (set->bmpLength+(set->length-set->bmpLength)/2+1)/2;
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}
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U_CAPI UBool U_EXPORT2
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uset_getSerializedRange(const USerializedSet* set, int32_t rangeIndex,
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UChar32* pStart, UChar32* pEnd) {
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const uint16_t* array;
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int32_t bmpLength, length;
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if(set==NULL || rangeIndex<0 || pStart==NULL || pEnd==NULL) {
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return FALSE;
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}
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array=set->array;
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length=set->length;
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bmpLength=set->bmpLength;
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rangeIndex*=2; /* address start/limit pairs */
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if(rangeIndex<bmpLength) {
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*pStart=array[rangeIndex++];
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if(rangeIndex<bmpLength) {
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*pEnd=array[rangeIndex];
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} else if(rangeIndex<length) {
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*pEnd=(((int32_t)array[rangeIndex])<<16)|array[rangeIndex+1];
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} else {
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*pEnd=0x110000;
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}
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--*pEnd;
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return TRUE;
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} else {
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rangeIndex-=bmpLength;
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rangeIndex*=2; /* address pairs of pairs of units */
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length-=bmpLength;
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if(rangeIndex<length) {
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array+=bmpLength;
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*pStart=(((int32_t)array[rangeIndex])<<16)|array[rangeIndex+1];
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rangeIndex+=2;
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if(rangeIndex<length) {
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*pEnd=(((int32_t)array[rangeIndex])<<16)|array[rangeIndex+1];
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} else {
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*pEnd=0x110000;
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}
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--*pEnd;
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return TRUE;
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} else {
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return FALSE;
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}
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}
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}
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// TODO Investigate incorporating this code into UnicodeSet to improve
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// efficiency.
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// ---
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// #define USET_GROW_DELTA 20
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//
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// static U_INLINE int32_t
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// findChar(const UChar32* array, int32_t length, UChar32 c) {
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// int32_t i;
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//
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// /* check the last range limit first for more efficient appending */
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// if(length>0) {
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// if(c>=array[length-1]) {
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// return length;
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// }
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//
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// /* do not check the last range limit again in the loop below */
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// --length;
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// }
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//
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// for(i=0; i<length && c>=array[i]; ++i) {}
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// return i;
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// }
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//
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// static UBool
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// addRemove(USet* set, UChar32 c, int32_t doRemove) {
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// int32_t i, length, more;
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//
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// if(set==NULL || (uint32_t)c>0x10ffff) {
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// return FALSE;
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// }
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//
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// length=set->length;
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// i=findChar(set->array, length, c);
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// if((i&1)^doRemove) {
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// /* c is already in the set */
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// return TRUE;
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// }
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//
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// /* how many more array items do we need? */
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// if(i<length && (c+1)==set->array[i]) {
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// /* c is just before the following range, extend that in-place by one */
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// set->array[i]=c;
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// if(i>0) {
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// --i;
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// if(c==set->array[i]) {
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// /* the previous range collapsed, remove it */
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// set->length=length-=2;
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// if(i<length) {
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// uprv_memmove(set->array+i, set->array+i+2, (length-i)*4);
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// }
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// }
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// }
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// return TRUE;
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// } else if(i>0 && c==set->array[i-1]) {
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// /* c is just after the previous range, extend that in-place by one */
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// if(++c<=0x10ffff) {
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// set->array[i-1]=c;
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// if(i<length && c==set->array[i]) {
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// /* the following range collapsed, remove it */
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// --i;
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// set->length=length-=2;
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// if(i<length) {
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// uprv_memmove(set->array+i, set->array+i+2, (length-i)*4);
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// }
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// }
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// } else {
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// /* extend the previous range (had limit 0x10ffff) to the end of Unicode */
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// set->length=i-1;
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// }
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// return TRUE;
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// } else if(i==length && c==0x10ffff) {
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// /* insert one range limit c */
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// more=1;
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// } else {
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// /* insert two range limits c, c+1 */
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// more=2;
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// }
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//
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// /* insert <more> range limits */
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// if(length+more>set->capacity) {
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// /* reallocate */
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// int32_t newCapacity=set->capacity+set->capacity/2+USET_GROW_DELTA;
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// UChar32* newArray=(UChar32* )uprv_malloc(newCapacity*4);
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// if(newArray==NULL) {
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// return FALSE;
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// }
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// set->capacity=newCapacity;
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// uprv_memcpy(newArray, set->array, length*4);
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//
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// if(set->array!=set->staticBuffer) {
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// uprv_free(set->array);
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// }
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// set->array=newArray;
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// }
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//
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// if(i<length) {
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// uprv_memmove(set->array+i+more, set->array+i, (length-i)*4);
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// }
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// set->array[i]=c;
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// if(more==2) {
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// set->array[i+1]=c+1;
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// }
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// set->length+=more;
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//
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// return TRUE;
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// }
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//
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// U_CAPI UBool U_EXPORT2
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// uset_add(USet* set, UChar32 c) {
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// return addRemove(set, c, 0);
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// }
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//
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// U_CAPI void U_EXPORT2
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// uset_remove(USet* set, UChar32 c) {
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// addRemove(set, c, 1);
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// }
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