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scuffed-code/icu4c/source/common/uset.cpp
Markus Scherer 98f9170004 ICU-20250 make UnicodeSet(intprop=value) faster 
- fastpath for UnicodeSet.add(new last range)
- fewer UnicodeSet memory allocations:
  initial internal list array, exponential array growth,
  allocate strings list/set only when first one is added
- faster CodePointTrie.getRange(): fewer calls to filter function
- revert UnicodeSet(intprop=value) from trie ranges to range starts + lookup
- cache per-int-prop range starts: fewer lookups
2018-11-12 16:05:57 -08:00

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// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
/*
*******************************************************************************
*
* Copyright (C) 2002-2011, International Business Machines
* Corporation and others. All Rights Reserved.
*
*******************************************************************************
* file name: uset.cpp
* encoding: UTF-8
* tab size: 8 (not used)
* indentation:4
*
* created on: 2002mar07
* created by: Markus W. Scherer
*
* There are functions to efficiently serialize a USet into an array of uint16_t
* and functions to use such a serialized form efficiently without
* instantiating a new USet.
*/
#include "unicode/utypes.h"
#include "unicode/uobject.h"
#include "unicode/uset.h"
#include "unicode/uniset.h"
#include "cmemory.h"
#include "unicode/ustring.h"
#include "unicode/parsepos.h"
U_NAMESPACE_USE
U_CAPI USet* U_EXPORT2
uset_openEmpty() {
return (USet*) new UnicodeSet();
}
U_CAPI USet* U_EXPORT2
uset_open(UChar32 start, UChar32 end) {
return (USet*) new UnicodeSet(start, end);
}
U_CAPI void U_EXPORT2
uset_close(USet* set) {
delete (UnicodeSet*) set;
}
U_CAPI USet * U_EXPORT2
uset_clone(const USet *set) {
return (USet*) (((UnicodeSet*) set)->UnicodeSet::clone());
}
U_CAPI UBool U_EXPORT2
uset_isFrozen(const USet *set) {
return ((UnicodeSet*) set)->UnicodeSet::isFrozen();
}
U_CAPI void U_EXPORT2
uset_freeze(USet *set) {
((UnicodeSet*) set)->UnicodeSet::freeze();
}
U_CAPI USet * U_EXPORT2
uset_cloneAsThawed(const USet *set) {
return (USet*) (((UnicodeSet*) set)->UnicodeSet::cloneAsThawed());
}
U_CAPI void U_EXPORT2
uset_set(USet* set,
UChar32 start, UChar32 end) {
((UnicodeSet*) set)->UnicodeSet::set(start, end);
}
U_CAPI void U_EXPORT2
uset_addAll(USet* set, const USet *additionalSet) {
((UnicodeSet*) set)->UnicodeSet::addAll(*((const UnicodeSet*)additionalSet));
}
U_CAPI void U_EXPORT2
uset_add(USet* set, UChar32 c) {
((UnicodeSet*) set)->UnicodeSet::add(c);
}
U_CAPI void U_EXPORT2
uset_addRange(USet* set, UChar32 start, UChar32 end) {
((UnicodeSet*) set)->UnicodeSet::add(start, end);
}
U_CAPI void U_EXPORT2
uset_addString(USet* set, const UChar* str, int32_t strLen) {
// UnicodeString handles -1 for strLen
UnicodeString s(strLen<0, str, strLen);
((UnicodeSet*) set)->UnicodeSet::add(s);
}
U_CAPI void U_EXPORT2
uset_addAllCodePoints(USet* set, const UChar *str, int32_t strLen) {
// UnicodeString handles -1 for strLen
UnicodeString s(str, strLen);
((UnicodeSet*) set)->UnicodeSet::addAll(s);
}
U_CAPI void U_EXPORT2
uset_remove(USet* set, UChar32 c) {
((UnicodeSet*) set)->UnicodeSet::remove(c);
}
U_CAPI void U_EXPORT2
uset_removeRange(USet* set, UChar32 start, UChar32 end) {
((UnicodeSet*) set)->UnicodeSet::remove(start, end);
}
U_CAPI void U_EXPORT2
uset_removeString(USet* set, const UChar* str, int32_t strLen) {
UnicodeString s(strLen==-1, str, strLen);
((UnicodeSet*) set)->UnicodeSet::remove(s);
}
U_CAPI void U_EXPORT2
uset_removeAll(USet* set, const USet* remove) {
((UnicodeSet*) set)->UnicodeSet::removeAll(*(const UnicodeSet*)remove);
}
U_CAPI void U_EXPORT2
uset_retain(USet* set, UChar32 start, UChar32 end) {
((UnicodeSet*) set)->UnicodeSet::retain(start, end);
}
U_CAPI void U_EXPORT2
uset_retainAll(USet* set, const USet* retain) {
((UnicodeSet*) set)->UnicodeSet::retainAll(*(const UnicodeSet*)retain);
}
U_CAPI void U_EXPORT2
uset_compact(USet* set) {
((UnicodeSet*) set)->UnicodeSet::compact();
}
U_CAPI void U_EXPORT2
uset_complement(USet* set) {
((UnicodeSet*) set)->UnicodeSet::complement();
}
U_CAPI void U_EXPORT2
uset_complementAll(USet* set, const USet* complement) {
((UnicodeSet*) set)->UnicodeSet::complementAll(*(const UnicodeSet*)complement);
}
U_CAPI void U_EXPORT2
uset_clear(USet* set) {
((UnicodeSet*) set)->UnicodeSet::clear();
}
U_CAPI void U_EXPORT2
uset_removeAllStrings(USet* set) {
((UnicodeSet*) set)->UnicodeSet::removeAllStrings();
}
U_CAPI UBool U_EXPORT2
uset_isEmpty(const USet* set) {
return ((const UnicodeSet*) set)->UnicodeSet::isEmpty();
}
U_CAPI UBool U_EXPORT2
uset_contains(const USet* set, UChar32 c) {
return ((const UnicodeSet*) set)->UnicodeSet::contains(c);
}
U_CAPI UBool U_EXPORT2
uset_containsRange(const USet* set, UChar32 start, UChar32 end) {
return ((const UnicodeSet*) set)->UnicodeSet::contains(start, end);
}
U_CAPI UBool U_EXPORT2
uset_containsString(const USet* set, const UChar* str, int32_t strLen) {
UnicodeString s(strLen==-1, str, strLen);
return ((const UnicodeSet*) set)->UnicodeSet::contains(s);
}
U_CAPI UBool U_EXPORT2
uset_containsAll(const USet* set1, const USet* set2) {
return ((const UnicodeSet*) set1)->UnicodeSet::containsAll(* (const UnicodeSet*) set2);
}
U_CAPI UBool U_EXPORT2
uset_containsAllCodePoints(const USet* set, const UChar *str, int32_t strLen) {
// Create a string alias, since nothing is being added to the set.
UnicodeString s(strLen==-1, str, strLen);
return ((const UnicodeSet*) set)->UnicodeSet::containsAll(s);
}
U_CAPI UBool U_EXPORT2
uset_containsNone(const USet* set1, const USet* set2) {
return ((const UnicodeSet*) set1)->UnicodeSet::containsNone(* (const UnicodeSet*) set2);
}
U_CAPI UBool U_EXPORT2
uset_containsSome(const USet* set1, const USet* set2) {
return ((const UnicodeSet*) set1)->UnicodeSet::containsSome(* (const UnicodeSet*) set2);
}
U_CAPI int32_t U_EXPORT2
uset_span(const USet *set, const UChar *s, int32_t length, USetSpanCondition spanCondition) {
return ((UnicodeSet*) set)->UnicodeSet::span(s, length, spanCondition);
}
U_CAPI int32_t U_EXPORT2
uset_spanBack(const USet *set, const UChar *s, int32_t length, USetSpanCondition spanCondition) {
return ((UnicodeSet*) set)->UnicodeSet::spanBack(s, length, spanCondition);
}
U_CAPI int32_t U_EXPORT2
uset_spanUTF8(const USet *set, const char *s, int32_t length, USetSpanCondition spanCondition) {
return ((UnicodeSet*) set)->UnicodeSet::spanUTF8(s, length, spanCondition);
}
U_CAPI int32_t U_EXPORT2
uset_spanBackUTF8(const USet *set, const char *s, int32_t length, USetSpanCondition spanCondition) {
return ((UnicodeSet*) set)->UnicodeSet::spanBackUTF8(s, length, spanCondition);
}
U_CAPI UBool U_EXPORT2
uset_equals(const USet* set1, const USet* set2) {
return *(const UnicodeSet*)set1 == *(const UnicodeSet*)set2;
}
U_CAPI int32_t U_EXPORT2
uset_indexOf(const USet* set, UChar32 c) {
return ((UnicodeSet*) set)->UnicodeSet::indexOf(c);
}
U_CAPI UChar32 U_EXPORT2
uset_charAt(const USet* set, int32_t index) {
return ((UnicodeSet*) set)->UnicodeSet::charAt(index);
}
U_CAPI int32_t U_EXPORT2
uset_size(const USet* set) {
return ((const UnicodeSet*) set)->UnicodeSet::size();
}
U_NAMESPACE_BEGIN
/**
* This class only exists to provide access to the UnicodeSet private
* USet support API. Declaring a class a friend is more portable than
* trying to declare extern "C" functions as friends.
*/
class USetAccess /* not : public UObject because all methods are static */ {
public:
/* Try to have the compiler inline these*/
inline static int32_t getStringCount(const UnicodeSet& set) {
return set.stringsSize();
}
inline static const UnicodeString* getString(const UnicodeSet& set,
int32_t i) {
return set.getString(i);
}
private:
/* do not instantiate*/
USetAccess();
};
U_NAMESPACE_END
U_CAPI int32_t U_EXPORT2
uset_getItemCount(const USet* uset) {
const UnicodeSet& set = *(const UnicodeSet*)uset;
return set.getRangeCount() + USetAccess::getStringCount(set);
}
U_CAPI int32_t U_EXPORT2
uset_getItem(const USet* uset, int32_t itemIndex,
UChar32* start, UChar32* end,
UChar* str, int32_t strCapacity,
UErrorCode* ec) {
if (U_FAILURE(*ec)) return 0;
const UnicodeSet& set = *(const UnicodeSet*)uset;
int32_t rangeCount;
if (itemIndex < 0) {
*ec = U_ILLEGAL_ARGUMENT_ERROR;
return -1;
} else if (itemIndex < (rangeCount = set.getRangeCount())) {
*start = set.getRangeStart(itemIndex);
*end = set.getRangeEnd(itemIndex);
return 0;
} else {
itemIndex -= rangeCount;
if (itemIndex < USetAccess::getStringCount(set)) {
const UnicodeString* s = USetAccess::getString(set, itemIndex);
return s->extract(str, strCapacity, *ec);
} else {
*ec = U_INDEX_OUTOFBOUNDS_ERROR;
return -1;
}
}
}
//U_CAPI int32_t U_EXPORT2
//uset_getRangeCount(const USet* set) {
// return ((const UnicodeSet*) set)->getRangeCount();
//}
//
//U_CAPI UBool U_EXPORT2
//uset_getRange(const USet* set, int32_t rangeIndex,
// UChar32* pStart, UChar32* pEnd) {
// if ((uint32_t) rangeIndex >= (uint32_t) uset_getRangeCount(set)) {
// return FALSE;
// }
// const UnicodeSet* us = (const UnicodeSet*) set;
// *pStart = us->getRangeStart(rangeIndex);
// *pEnd = us->getRangeEnd(rangeIndex);
// return TRUE;
//}
/*
* Serialize a USet into 16-bit units.
* Store BMP code points as themselves with one 16-bit unit each.
*
* Important: the code points in the array are in ascending order,
* therefore all BMP code points precede all supplementary code points.
*
* Store each supplementary code point in 2 16-bit units,
* simply with higher-then-lower 16-bit halfs.
*
* Precede the entire list with the length.
* If there are supplementary code points, then set bit 15 in the length
* and add the bmpLength between it and the array.
*
* In other words:
* - all BMP: (length=bmpLength) BMP, .., BMP
* - some supplementary: (length|0x8000) (bmpLength<length) BMP, .., BMP, supp-high, supp-low, ..
*/
U_CAPI int32_t U_EXPORT2
uset_serialize(const USet* set, uint16_t* dest, int32_t destCapacity, UErrorCode* ec) {
if (ec==NULL || U_FAILURE(*ec)) {
return 0;
}
return ((const UnicodeSet*) set)->UnicodeSet::serialize(dest, destCapacity,* ec);
}
U_CAPI UBool U_EXPORT2
uset_getSerializedSet(USerializedSet* fillSet, const uint16_t* src, int32_t srcLength) {
int32_t length;
if(fillSet==NULL) {
return FALSE;
}
if(src==NULL || srcLength<=0) {
fillSet->length=fillSet->bmpLength=0;
return FALSE;
}
length=*src++;
if(length&0x8000) {
/* there are supplementary values */
length&=0x7fff;
if(srcLength<(2+length)) {
fillSet->length=fillSet->bmpLength=0;
return FALSE;
}
fillSet->bmpLength=*src++;
} else {
/* only BMP values */
if(srcLength<(1+length)) {
fillSet->length=fillSet->bmpLength=0;
return FALSE;
}
fillSet->bmpLength=length;
}
fillSet->array=src;
fillSet->length=length;
return TRUE;
}
U_CAPI void U_EXPORT2
uset_setSerializedToOne(USerializedSet* fillSet, UChar32 c) {
if(fillSet==NULL || (uint32_t)c>0x10ffff) {
return;
}
fillSet->array=fillSet->staticArray;
if(c<0xffff) {
fillSet->bmpLength=fillSet->length=2;
fillSet->staticArray[0]=(uint16_t)c;
fillSet->staticArray[1]=(uint16_t)c+1;
} else if(c==0xffff) {
fillSet->bmpLength=1;
fillSet->length=3;
fillSet->staticArray[0]=0xffff;
fillSet->staticArray[1]=1;
fillSet->staticArray[2]=0;
} else if(c<0x10ffff) {
fillSet->bmpLength=0;
fillSet->length=4;
fillSet->staticArray[0]=(uint16_t)(c>>16);
fillSet->staticArray[1]=(uint16_t)c;
++c;
fillSet->staticArray[2]=(uint16_t)(c>>16);
fillSet->staticArray[3]=(uint16_t)c;
} else /* c==0x10ffff */ {
fillSet->bmpLength=0;
fillSet->length=2;
fillSet->staticArray[0]=0x10;
fillSet->staticArray[1]=0xffff;
}
}
U_CAPI UBool U_EXPORT2
uset_serializedContains(const USerializedSet* set, UChar32 c) {
const uint16_t* array;
if(set==NULL || (uint32_t)c>0x10ffff) {
return FALSE;
}
array=set->array;
if(c<=0xffff) {
/* find c in the BMP part */
int32_t lo = 0;
int32_t hi = set->bmpLength-1;
if (c < array[0]) {
hi = 0;
} else if (c < array[hi]) {
for(;;) {
int32_t i = (lo + hi) >> 1;
if (i == lo) {
break; // Done!
} else if (c < array[i]) {
hi = i;
} else {
lo = i;
}
}
} else {
hi += 1;
}
return (UBool)(hi&1);
} else {
/* find c in the supplementary part */
uint16_t high=(uint16_t)(c>>16), low=(uint16_t)c;
int32_t base = set->bmpLength;
int32_t lo = 0;
int32_t hi = set->length - 2 - base;
if (high < array[base] || (high==array[base] && low<array[base+1])) {
hi = 0;
} else if (high < array[base+hi] || (high==array[base+hi] && low<array[base+hi+1])) {
for (;;) {
int32_t i = ((lo + hi) >> 1) & ~1; // Guarantee even result
int32_t iabs = i + base;
if (i == lo) {
break; // Done!
} else if (high < array[iabs] || (high==array[iabs] && low<array[iabs+1])) {
hi = i;
} else {
lo = i;
}
}
} else {
hi += 2;
}
/* count pairs of 16-bit units even per BMP and check if the number of pairs is odd */
return (UBool)(((hi+(base<<1))&2)!=0);
}
}
U_CAPI int32_t U_EXPORT2
uset_getSerializedRangeCount(const USerializedSet* set) {
if(set==NULL) {
return 0;
}
return (set->bmpLength+(set->length-set->bmpLength)/2+1)/2;
}
U_CAPI UBool U_EXPORT2
uset_getSerializedRange(const USerializedSet* set, int32_t rangeIndex,
UChar32* pStart, UChar32* pEnd) {
const uint16_t* array;
int32_t bmpLength, length;
if(set==NULL || rangeIndex<0 || pStart==NULL || pEnd==NULL) {
return FALSE;
}
array=set->array;
length=set->length;
bmpLength=set->bmpLength;
rangeIndex*=2; /* address start/limit pairs */
if(rangeIndex<bmpLength) {
*pStart=array[rangeIndex++];
if(rangeIndex<bmpLength) {
*pEnd=array[rangeIndex]-1;
} else if(rangeIndex<length) {
*pEnd=((((int32_t)array[rangeIndex])<<16)|array[rangeIndex+1])-1;
} else {
*pEnd=0x10ffff;
}
return TRUE;
} else {
rangeIndex-=bmpLength;
rangeIndex*=2; /* address pairs of pairs of units */
length-=bmpLength;
if(rangeIndex<length) {
array+=bmpLength;
*pStart=(((int32_t)array[rangeIndex])<<16)|array[rangeIndex+1];
rangeIndex+=2;
if(rangeIndex<length) {
*pEnd=((((int32_t)array[rangeIndex])<<16)|array[rangeIndex+1])-1;
} else {
*pEnd=0x10ffff;
}
return TRUE;
} else {
return FALSE;
}
}
}
// TODO The old, internal uset.c had an efficient uset_containsOne function.
// Returned the one and only code point, or else -1 or something.
// Consider adding such a function to both C and C++ UnicodeSet/uset.
// See tools/gennorm/store.c for usage, now usetContainsOne there.
// TODO Investigate incorporating this code into UnicodeSet to improve
// efficiency.
// ---
// #define USET_GROW_DELTA 20
//
// static int32_t
// findChar(const UChar32* array, int32_t length, UChar32 c) {
// int32_t i;
//
// /* check the last range limit first for more efficient appending */
// if(length>0) {
// if(c>=array[length-1]) {
// return length;
// }
//
// /* do not check the last range limit again in the loop below */
// --length;
// }
//
// for(i=0; i<length && c>=array[i]; ++i) {}
// return i;
// }
//
// static UBool
// addRemove(USet* set, UChar32 c, int32_t doRemove) {
// int32_t i, length, more;
//
// if(set==NULL || (uint32_t)c>0x10ffff) {
// return FALSE;
// }
//
// length=set->length;
// i=findChar(set->array, length, c);
// if((i&1)^doRemove) {
// /* c is already in the set */
// return TRUE;
// }
//
// /* how many more array items do we need? */
// if(i<length && (c+1)==set->array[i]) {
// /* c is just before the following range, extend that in-place by one */
// set->array[i]=c;
// if(i>0) {
// --i;
// if(c==set->array[i]) {
// /* the previous range collapsed, remove it */
// set->length=length-=2;
// if(i<length) {
// uprv_memmove(set->array+i, set->array+i+2, (length-i)*4);
// }
// }
// }
// return TRUE;
// } else if(i>0 && c==set->array[i-1]) {
// /* c is just after the previous range, extend that in-place by one */
// if(++c<=0x10ffff) {
// set->array[i-1]=c;
// if(i<length && c==set->array[i]) {
// /* the following range collapsed, remove it */
// --i;
// set->length=length-=2;
// if(i<length) {
// uprv_memmove(set->array+i, set->array+i+2, (length-i)*4);
// }
// }
// } else {
// /* extend the previous range (had limit 0x10ffff) to the end of Unicode */
// set->length=i-1;
// }
// return TRUE;
// } else if(i==length && c==0x10ffff) {
// /* insert one range limit c */
// more=1;
// } else {
// /* insert two range limits c, c+1 */
// more=2;
// }
//
// /* insert <more> range limits */
// if(length+more>set->capacity) {
// /* reallocate */
// int32_t newCapacity=set->capacity+set->capacity/2+USET_GROW_DELTA;
// UChar32* newArray=(UChar32* )uprv_malloc(newCapacity*4);
// if(newArray==NULL) {
// return FALSE;
// }
// set->capacity=newCapacity;
// uprv_memcpy(newArray, set->array, length*4);
//
// if(set->array!=set->staticBuffer) {
// uprv_free(set->array);
// }
// set->array=newArray;
// }
//
// if(i<length) {
// uprv_memmove(set->array+i+more, set->array+i, (length-i)*4);
// }
// set->array[i]=c;
// if(more==2) {
// set->array[i+1]=c+1;
// }
// set->length+=more;
//
// return TRUE;
// }
//
// U_CAPI UBool U_EXPORT2
// uset_add(USet* set, UChar32 c) {
// return addRemove(set, c, 0);
// }
//
// U_CAPI void U_EXPORT2
// uset_remove(USet* set, UChar32 c) {
// addRemove(set, c, 1);
// }
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