You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
410 lines
17 KiB
410 lines
17 KiB
// © 2016 and later: Unicode, Inc. and others.
|
|
// License & terms of use: http://www.unicode.org/copyright.html
|
|
/*
|
|
*******************************************************************************
|
|
* Copyright (C) 2013-2014, International Business Machines
|
|
* Corporation and others. All Rights Reserved.
|
|
*******************************************************************************
|
|
* collationbuilder.h
|
|
*
|
|
* created on: 2013may06
|
|
* created by: Markus W. Scherer
|
|
*/
|
|
|
|
#ifndef __COLLATIONBUILDER_H__
|
|
#define __COLLATIONBUILDER_H__
|
|
|
|
#include "unicode/utypes.h"
|
|
|
|
#if !UCONFIG_NO_COLLATION
|
|
|
|
#include "unicode/uniset.h"
|
|
#include "unicode/unistr.h"
|
|
#include "collationrootelements.h"
|
|
#include "collationruleparser.h"
|
|
#include "uvectr32.h"
|
|
#include "uvectr64.h"
|
|
|
|
struct UParseError;
|
|
|
|
U_NAMESPACE_BEGIN
|
|
|
|
struct CollationData;
|
|
struct CollationTailoring;
|
|
|
|
class CEFinalizer;
|
|
class CollationDataBuilder;
|
|
class Normalizer2;
|
|
class Normalizer2Impl;
|
|
|
|
class U_I18N_API CollationBuilder : public CollationRuleParser::Sink {
|
|
public:
|
|
CollationBuilder(const CollationTailoring *base, UErrorCode &errorCode);
|
|
virtual ~CollationBuilder();
|
|
|
|
void disableFastLatin() { fastLatinEnabled = false; }
|
|
|
|
CollationTailoring *parseAndBuild(const UnicodeString &ruleString,
|
|
const UVersionInfo rulesVersion,
|
|
CollationRuleParser::Importer *importer,
|
|
UParseError *outParseError,
|
|
UErrorCode &errorCode);
|
|
|
|
const char *getErrorReason() const { return errorReason; }
|
|
|
|
private:
|
|
friend class CEFinalizer;
|
|
|
|
/** Implements CollationRuleParser::Sink. */
|
|
virtual void addReset(int32_t strength, const UnicodeString &str,
|
|
const char *&errorReason, UErrorCode &errorCode);
|
|
/**
|
|
* Returns the secondary or tertiary weight preceding the current node's weight.
|
|
* node=nodes[index].
|
|
*/
|
|
uint32_t getWeight16Before(int32_t index, int64_t node, int32_t level);
|
|
|
|
int64_t getSpecialResetPosition(const UnicodeString &str,
|
|
const char *&parserErrorReason, UErrorCode &errorCode);
|
|
|
|
/** Implements CollationRuleParser::Sink. */
|
|
virtual void addRelation(int32_t strength, const UnicodeString &prefix,
|
|
const UnicodeString &str, const UnicodeString &extension,
|
|
const char *&errorReason, UErrorCode &errorCode);
|
|
|
|
/**
|
|
* Picks one of the current CEs and finds or inserts a node in the graph
|
|
* for the CE + strength.
|
|
*/
|
|
int32_t findOrInsertNodeForCEs(int32_t strength, const char *&parserErrorReason,
|
|
UErrorCode &errorCode);
|
|
int32_t findOrInsertNodeForRootCE(int64_t ce, int32_t strength, UErrorCode &errorCode);
|
|
/** Finds or inserts the node for a root CE's primary weight. */
|
|
int32_t findOrInsertNodeForPrimary(uint32_t p, UErrorCode &errorCode);
|
|
/** Finds or inserts the node for a secondary or tertiary weight. */
|
|
int32_t findOrInsertWeakNode(int32_t index, uint32_t weight16, int32_t level,
|
|
UErrorCode &errorCode);
|
|
|
|
/**
|
|
* Makes and inserts a new tailored node into the list, after the one at index.
|
|
* Skips over nodes of weaker strength to maintain collation order
|
|
* ("postpone insertion").
|
|
* @return the new node's index
|
|
*/
|
|
int32_t insertTailoredNodeAfter(int32_t index, int32_t strength, UErrorCode &errorCode);
|
|
|
|
/**
|
|
* Inserts a new node into the list, between list-adjacent items.
|
|
* The node's previous and next indexes must not be set yet.
|
|
* @return the new node's index
|
|
*/
|
|
int32_t insertNodeBetween(int32_t index, int32_t nextIndex, int64_t node,
|
|
UErrorCode &errorCode);
|
|
|
|
/**
|
|
* Finds the node which implies or contains a common=05 weight of the given strength
|
|
* (secondary or tertiary), if the current node is stronger.
|
|
* Skips weaker nodes and tailored nodes if the current node is stronger
|
|
* and is followed by an explicit-common-weight node.
|
|
* Always returns the input index if that node is no stronger than the given strength.
|
|
*/
|
|
int32_t findCommonNode(int32_t index, int32_t strength) const;
|
|
|
|
void setCaseBits(const UnicodeString &nfdString,
|
|
const char *&parserErrorReason, UErrorCode &errorCode);
|
|
|
|
/** Implements CollationRuleParser::Sink. */
|
|
virtual void suppressContractions(const UnicodeSet &set, const char *&parserErrorReason,
|
|
UErrorCode &errorCode);
|
|
|
|
/** Implements CollationRuleParser::Sink. */
|
|
virtual void optimize(const UnicodeSet &set, const char *&parserErrorReason,
|
|
UErrorCode &errorCode);
|
|
|
|
/**
|
|
* Adds the mapping and its canonical closure.
|
|
* Takes ce32=dataBuilder->encodeCEs(...) so that the data builder
|
|
* need not re-encode the CEs multiple times.
|
|
*/
|
|
uint32_t addWithClosure(const UnicodeString &nfdPrefix, const UnicodeString &nfdString,
|
|
const int64_t newCEs[], int32_t newCEsLength, uint32_t ce32,
|
|
UErrorCode &errorCode);
|
|
uint32_t addOnlyClosure(const UnicodeString &nfdPrefix, const UnicodeString &nfdString,
|
|
const int64_t newCEs[], int32_t newCEsLength, uint32_t ce32,
|
|
UErrorCode &errorCode);
|
|
void addTailComposites(const UnicodeString &nfdPrefix, const UnicodeString &nfdString,
|
|
UErrorCode &errorCode);
|
|
UBool mergeCompositeIntoString(const UnicodeString &nfdString, int32_t indexAfterLastStarter,
|
|
UChar32 composite, const UnicodeString &decomp,
|
|
UnicodeString &newNFDString, UnicodeString &newString,
|
|
UErrorCode &errorCode) const;
|
|
|
|
UBool ignorePrefix(const UnicodeString &s, UErrorCode &errorCode) const;
|
|
UBool ignoreString(const UnicodeString &s, UErrorCode &errorCode) const;
|
|
UBool isFCD(const UnicodeString &s, UErrorCode &errorCode) const;
|
|
|
|
void closeOverComposites(UErrorCode &errorCode);
|
|
|
|
uint32_t addIfDifferent(const UnicodeString &prefix, const UnicodeString &str,
|
|
const int64_t newCEs[], int32_t newCEsLength, uint32_t ce32,
|
|
UErrorCode &errorCode);
|
|
static UBool sameCEs(const int64_t ces1[], int32_t ces1Length,
|
|
const int64_t ces2[], int32_t ces2Length);
|
|
|
|
/**
|
|
* Walks the tailoring graph and overwrites tailored nodes with new CEs.
|
|
* After this, the graph is destroyed.
|
|
* The nodes array can then be used only as a source of tailored CEs.
|
|
*/
|
|
void makeTailoredCEs(UErrorCode &errorCode);
|
|
/**
|
|
* Counts the tailored nodes of the given strength up to the next node
|
|
* which is either stronger or has an explicit weight of this strength.
|
|
*/
|
|
static int32_t countTailoredNodes(const int64_t *nodesArray, int32_t i, int32_t strength);
|
|
|
|
/** Replaces temporary CEs with the final CEs they point to. */
|
|
void finalizeCEs(UErrorCode &errorCode);
|
|
|
|
/**
|
|
* Encodes "temporary CE" data into a CE that fits into the CE32 data structure,
|
|
* with 2-byte primary, 1-byte secondary and 6-bit tertiary,
|
|
* with valid CE byte values.
|
|
*
|
|
* The index must not exceed 20 bits (0xfffff).
|
|
* The strength must fit into 2 bits (UCOL_PRIMARY..UCOL_QUATERNARY).
|
|
*
|
|
* Temporary CEs are distinguished from real CEs by their use of
|
|
* secondary weights 06..45 which are otherwise reserved for compressed sort keys.
|
|
*
|
|
* The case bits are unused and available.
|
|
*/
|
|
static inline int64_t tempCEFromIndexAndStrength(int32_t index, int32_t strength) {
|
|
return
|
|
// CE byte offsets, to ensure valid CE bytes, and case bits 11
|
|
INT64_C(0x4040000006002000) +
|
|
// index bits 19..13 -> primary byte 1 = CE bits 63..56 (byte values 40..BF)
|
|
((int64_t)(index & 0xfe000) << 43) +
|
|
// index bits 12..6 -> primary byte 2 = CE bits 55..48 (byte values 40..BF)
|
|
((int64_t)(index & 0x1fc0) << 42) +
|
|
// index bits 5..0 -> secondary byte 1 = CE bits 31..24 (byte values 06..45)
|
|
((index & 0x3f) << 24) +
|
|
// strength bits 1..0 -> tertiary byte 1 = CE bits 13..8 (byte values 20..23)
|
|
(strength << 8);
|
|
}
|
|
static inline int32_t indexFromTempCE(int64_t tempCE) {
|
|
tempCE -= INT64_C(0x4040000006002000);
|
|
return
|
|
((int32_t)(tempCE >> 43) & 0xfe000) |
|
|
((int32_t)(tempCE >> 42) & 0x1fc0) |
|
|
((int32_t)(tempCE >> 24) & 0x3f);
|
|
}
|
|
static inline int32_t strengthFromTempCE(int64_t tempCE) {
|
|
return ((int32_t)tempCE >> 8) & 3;
|
|
}
|
|
static inline UBool isTempCE(int64_t ce) {
|
|
uint32_t sec = (uint32_t)ce >> 24;
|
|
return 6 <= sec && sec <= 0x45;
|
|
}
|
|
|
|
static inline int32_t indexFromTempCE32(uint32_t tempCE32) {
|
|
tempCE32 -= 0x40400620;
|
|
return
|
|
((int32_t)(tempCE32 >> 11) & 0xfe000) |
|
|
((int32_t)(tempCE32 >> 10) & 0x1fc0) |
|
|
((int32_t)(tempCE32 >> 8) & 0x3f);
|
|
}
|
|
static inline UBool isTempCE32(uint32_t ce32) {
|
|
return
|
|
(ce32 & 0xff) >= 2 && // not a long-primary/long-secondary CE32
|
|
6 <= ((ce32 >> 8) & 0xff) && ((ce32 >> 8) & 0xff) <= 0x45;
|
|
}
|
|
|
|
static int32_t ceStrength(int64_t ce);
|
|
|
|
/** At most 1M nodes, limited by the 20 bits in node bit fields. */
|
|
static const int32_t MAX_INDEX = 0xfffff;
|
|
/**
|
|
* Node bit 6 is set on a primary node if there are nodes
|
|
* with secondary values below the common secondary weight (05).
|
|
*/
|
|
static const int32_t HAS_BEFORE2 = 0x40;
|
|
/**
|
|
* Node bit 5 is set on a primary or secondary node if there are nodes
|
|
* with tertiary values below the common tertiary weight (05).
|
|
*/
|
|
static const int32_t HAS_BEFORE3 = 0x20;
|
|
/**
|
|
* Node bit 3 distinguishes a tailored node, which has no weight value,
|
|
* from a node with an explicit (root or default) weight.
|
|
*/
|
|
static const int32_t IS_TAILORED = 8;
|
|
|
|
static inline int64_t nodeFromWeight32(uint32_t weight32) {
|
|
return (int64_t)weight32 << 32;
|
|
}
|
|
static inline int64_t nodeFromWeight16(uint32_t weight16) {
|
|
return (int64_t)weight16 << 48;
|
|
}
|
|
static inline int64_t nodeFromPreviousIndex(int32_t previous) {
|
|
return (int64_t)previous << 28;
|
|
}
|
|
static inline int64_t nodeFromNextIndex(int32_t next) {
|
|
return next << 8;
|
|
}
|
|
static inline int64_t nodeFromStrength(int32_t strength) {
|
|
return strength;
|
|
}
|
|
|
|
static inline uint32_t weight32FromNode(int64_t node) {
|
|
return (uint32_t)(node >> 32);
|
|
}
|
|
static inline uint32_t weight16FromNode(int64_t node) {
|
|
return (uint32_t)(node >> 48) & 0xffff;
|
|
}
|
|
static inline int32_t previousIndexFromNode(int64_t node) {
|
|
return (int32_t)(node >> 28) & MAX_INDEX;
|
|
}
|
|
static inline int32_t nextIndexFromNode(int64_t node) {
|
|
return ((int32_t)node >> 8) & MAX_INDEX;
|
|
}
|
|
static inline int32_t strengthFromNode(int64_t node) {
|
|
return (int32_t)node & 3;
|
|
}
|
|
|
|
static inline UBool nodeHasBefore2(int64_t node) {
|
|
return (node & HAS_BEFORE2) != 0;
|
|
}
|
|
static inline UBool nodeHasBefore3(int64_t node) {
|
|
return (node & HAS_BEFORE3) != 0;
|
|
}
|
|
static inline UBool nodeHasAnyBefore(int64_t node) {
|
|
return (node & (HAS_BEFORE2 | HAS_BEFORE3)) != 0;
|
|
}
|
|
static inline UBool isTailoredNode(int64_t node) {
|
|
return (node & IS_TAILORED) != 0;
|
|
}
|
|
|
|
static inline int64_t changeNodePreviousIndex(int64_t node, int32_t previous) {
|
|
return (node & INT64_C(0xffff00000fffffff)) | nodeFromPreviousIndex(previous);
|
|
}
|
|
static inline int64_t changeNodeNextIndex(int64_t node, int32_t next) {
|
|
return (node & INT64_C(0xfffffffff00000ff)) | nodeFromNextIndex(next);
|
|
}
|
|
|
|
const Normalizer2 &nfd, &fcd;
|
|
const Normalizer2Impl &nfcImpl;
|
|
|
|
const CollationTailoring *base;
|
|
const CollationData *baseData;
|
|
const CollationRootElements rootElements;
|
|
uint32_t variableTop;
|
|
|
|
CollationDataBuilder *dataBuilder;
|
|
UBool fastLatinEnabled;
|
|
UnicodeSet optimizeSet;
|
|
const char *errorReason;
|
|
|
|
int64_t ces[Collation::MAX_EXPANSION_LENGTH];
|
|
int32_t cesLength;
|
|
|
|
/**
|
|
* Indexes of nodes with root primary weights, sorted by primary.
|
|
* Compact form of a TreeMap from root primary to node index.
|
|
*
|
|
* This is a performance optimization for finding reset positions.
|
|
* Without this, we would have to search through the entire nodes list.
|
|
* It also allows storing root primary weights in list head nodes,
|
|
* without previous index, leaving room in root primary nodes for 32-bit primary weights.
|
|
*/
|
|
UVector32 rootPrimaryIndexes;
|
|
/**
|
|
* Data structure for assigning tailored weights and CEs.
|
|
* Doubly-linked lists of nodes in mostly collation order.
|
|
* Each list starts with a root primary node and ends with a nextIndex of 0.
|
|
*
|
|
* When there are any nodes in the list, then there is always a root primary node at index 0.
|
|
* This allows some code not to have to check explicitly for nextIndex==0.
|
|
*
|
|
* Root primary nodes have 32-bit weights but do not have previous indexes.
|
|
* All other nodes have at most 16-bit weights and do have previous indexes.
|
|
*
|
|
* Nodes with explicit weights store root collator weights,
|
|
* or default weak weights (e.g., secondary 05) for stronger nodes.
|
|
* "Tailored" nodes, with the IS_TAILORED bit set,
|
|
* do not store explicit weights but rather
|
|
* create a difference of a certain strength from the preceding node.
|
|
*
|
|
* A root node is followed by either
|
|
* - a root/default node of the same strength, or
|
|
* - a root/default node of the next-weaker strength, or
|
|
* - a tailored node of the same strength.
|
|
*
|
|
* A node of a given strength normally implies "common" weights on weaker levels.
|
|
*
|
|
* A node with HAS_BEFORE2 must be immediately followed by
|
|
* a secondary node with an explicit below-common weight, then a secondary tailored node,
|
|
* and later an explicit common-secondary node.
|
|
* The below-common weight can be a root weight,
|
|
* or it can be BEFORE_WEIGHT16 for tailoring before an implied common weight
|
|
* or before the lowest root weight.
|
|
* (&[before 2] resets to an explicit secondary node so that
|
|
* the following addRelation(secondary) tailors right after that.
|
|
* If we did not have this node and instead were to reset on the primary node,
|
|
* then addRelation(secondary) would skip forward to the the COMMON_WEIGHT16 node.)
|
|
*
|
|
* If the flag is not set, then there are no explicit secondary nodes
|
|
* with the common or lower weights.
|
|
*
|
|
* Same for HAS_BEFORE3 for tertiary nodes and weights.
|
|
* A node must not have both flags set.
|
|
*
|
|
* Tailored CEs are initially represented in a CollationDataBuilder as temporary CEs
|
|
* which point to stable indexes in this list,
|
|
* and temporary CEs stored in a CollationDataBuilder only point to tailored nodes.
|
|
*
|
|
* A temporary CE in the ces[] array may point to a non-tailored reset-before-position node,
|
|
* until the next relation is added.
|
|
*
|
|
* At the end, the tailored weights are allocated as necessary,
|
|
* then the tailored nodes are replaced with final CEs,
|
|
* and the CollationData is rewritten by replacing temporary CEs with final ones.
|
|
*
|
|
* We cannot simply insert new nodes in the middle of the array
|
|
* because that would invalidate the indexes stored in existing temporary CEs.
|
|
* We need to use a linked graph with stable indexes to existing nodes.
|
|
* A doubly-linked list seems easiest to maintain.
|
|
*
|
|
* Each node is stored as an int64_t, with its fields stored as bit fields.
|
|
*
|
|
* Root primary node:
|
|
* - primary weight: 32 bits 63..32
|
|
* - reserved/unused/zero: 4 bits 31..28
|
|
*
|
|
* Weaker root nodes & tailored nodes:
|
|
* - a weight: 16 bits 63..48
|
|
* + a root or default weight for a non-tailored node
|
|
* + unused/zero for a tailored node
|
|
* - index to the previous node: 20 bits 47..28
|
|
*
|
|
* All types of nodes:
|
|
* - index to the next node: 20 bits 27..8
|
|
* + nextIndex=0 in last node per root-primary list
|
|
* - reserved/unused/zero bits: bits 7, 4, 2
|
|
* - HAS_BEFORE2: bit 6
|
|
* - HAS_BEFORE3: bit 5
|
|
* - IS_TAILORED: bit 3
|
|
* - the difference strength (primary/secondary/tertiary/quaternary): 2 bits 1..0
|
|
*
|
|
* We could allocate structs with pointers, but we would have to store them
|
|
* in a pointer list so that they can be indexed from temporary CEs,
|
|
* and they would require more memory allocations.
|
|
*/
|
|
UVector64 nodes;
|
|
};
|
|
|
|
U_NAMESPACE_END
|
|
|
|
#endif // !UCONFIG_NO_COLLATION
|
|
#endif // __COLLATIONBUILDER_H__
|