a5bbd505d7
support including all files in C cleanup and simplify the test/hdrtest Signed-off-by: Alon Bar-Lev <alon.barlev@gmail.com>
427 lines
15 KiB
C++
427 lines
15 KiB
C++
// © 2016 and later: Unicode, Inc. and others.
|
|
// License & terms of use: http://www.unicode.org/copyright.html
|
|
/*
|
|
*******************************************************************************
|
|
* Copyright (C) 2010-2012,2014, International Business Machines
|
|
* Corporation and others. All Rights Reserved.
|
|
*******************************************************************************
|
|
* file name: stringtriebuilder.h
|
|
* encoding: UTF-8
|
|
* tab size: 8 (not used)
|
|
* indentation:4
|
|
*
|
|
* created on: 2010dec24
|
|
* created by: Markus W. Scherer
|
|
*/
|
|
|
|
#ifndef __STRINGTRIEBUILDER_H__
|
|
#define __STRINGTRIEBUILDER_H__
|
|
|
|
#include "unicode/utypes.h"
|
|
|
|
#if U_SHOW_CPLUSPLUS_API
|
|
|
|
#include "unicode/uobject.h"
|
|
|
|
/**
|
|
* \file
|
|
* \brief C++ API: Builder API for trie builders
|
|
*/
|
|
|
|
// Forward declaration.
|
|
/// \cond
|
|
struct UHashtable;
|
|
typedef struct UHashtable UHashtable;
|
|
/// \endcond
|
|
|
|
/**
|
|
* Build options for BytesTrieBuilder and CharsTrieBuilder.
|
|
* @stable ICU 4.8
|
|
*/
|
|
enum UStringTrieBuildOption {
|
|
/**
|
|
* Builds a trie quickly.
|
|
* @stable ICU 4.8
|
|
*/
|
|
USTRINGTRIE_BUILD_FAST,
|
|
/**
|
|
* Builds a trie more slowly, attempting to generate
|
|
* a shorter but equivalent serialization.
|
|
* This build option also uses more memory.
|
|
*
|
|
* This option can be effective when many integer values are the same
|
|
* and string/byte sequence suffixes can be shared.
|
|
* Runtime speed is not expected to improve.
|
|
* @stable ICU 4.8
|
|
*/
|
|
USTRINGTRIE_BUILD_SMALL
|
|
};
|
|
|
|
U_NAMESPACE_BEGIN
|
|
|
|
/**
|
|
* Base class for string trie builder classes.
|
|
*
|
|
* This class is not intended for public subclassing.
|
|
* @stable ICU 4.8
|
|
*/
|
|
class U_COMMON_API StringTrieBuilder : public UObject {
|
|
public:
|
|
#ifndef U_HIDE_INTERNAL_API
|
|
/** @internal */
|
|
static int32_t hashNode(const void *node);
|
|
/** @internal */
|
|
static UBool equalNodes(const void *left, const void *right);
|
|
#endif /* U_HIDE_INTERNAL_API */
|
|
|
|
protected:
|
|
// Do not enclose the protected default constructor with #ifndef U_HIDE_INTERNAL_API
|
|
// or else the compiler will create a public default constructor.
|
|
/** @internal */
|
|
StringTrieBuilder();
|
|
/** @internal */
|
|
virtual ~StringTrieBuilder();
|
|
|
|
#ifndef U_HIDE_INTERNAL_API
|
|
/** @internal */
|
|
void createCompactBuilder(int32_t sizeGuess, UErrorCode &errorCode);
|
|
/** @internal */
|
|
void deleteCompactBuilder();
|
|
|
|
/** @internal */
|
|
void build(UStringTrieBuildOption buildOption, int32_t elementsLength, UErrorCode &errorCode);
|
|
|
|
/** @internal */
|
|
int32_t writeNode(int32_t start, int32_t limit, int32_t unitIndex);
|
|
/** @internal */
|
|
int32_t writeBranchSubNode(int32_t start, int32_t limit, int32_t unitIndex, int32_t length);
|
|
#endif /* U_HIDE_INTERNAL_API */
|
|
|
|
class Node;
|
|
|
|
#ifndef U_HIDE_INTERNAL_API
|
|
/** @internal */
|
|
Node *makeNode(int32_t start, int32_t limit, int32_t unitIndex, UErrorCode &errorCode);
|
|
/** @internal */
|
|
Node *makeBranchSubNode(int32_t start, int32_t limit, int32_t unitIndex,
|
|
int32_t length, UErrorCode &errorCode);
|
|
#endif /* U_HIDE_INTERNAL_API */
|
|
|
|
/** @internal */
|
|
virtual int32_t getElementStringLength(int32_t i) const = 0;
|
|
/** @internal */
|
|
virtual char16_t getElementUnit(int32_t i, int32_t unitIndex) const = 0;
|
|
/** @internal */
|
|
virtual int32_t getElementValue(int32_t i) const = 0;
|
|
|
|
// Finds the first unit index after this one where
|
|
// the first and last element have different units again.
|
|
/** @internal */
|
|
virtual int32_t getLimitOfLinearMatch(int32_t first, int32_t last, int32_t unitIndex) const = 0;
|
|
|
|
// Number of different units at unitIndex.
|
|
/** @internal */
|
|
virtual int32_t countElementUnits(int32_t start, int32_t limit, int32_t unitIndex) const = 0;
|
|
/** @internal */
|
|
virtual int32_t skipElementsBySomeUnits(int32_t i, int32_t unitIndex, int32_t count) const = 0;
|
|
/** @internal */
|
|
virtual int32_t indexOfElementWithNextUnit(int32_t i, int32_t unitIndex, char16_t unit) const = 0;
|
|
|
|
/** @internal */
|
|
virtual UBool matchNodesCanHaveValues() const = 0;
|
|
|
|
/** @internal */
|
|
virtual int32_t getMaxBranchLinearSubNodeLength() const = 0;
|
|
/** @internal */
|
|
virtual int32_t getMinLinearMatch() const = 0;
|
|
/** @internal */
|
|
virtual int32_t getMaxLinearMatchLength() const = 0;
|
|
|
|
#ifndef U_HIDE_INTERNAL_API
|
|
// max(BytesTrie::kMaxBranchLinearSubNodeLength, UCharsTrie::kMaxBranchLinearSubNodeLength).
|
|
/** @internal */
|
|
static const int32_t kMaxBranchLinearSubNodeLength=5;
|
|
|
|
// Maximum number of nested split-branch levels for a branch on all 2^16 possible char16_t units.
|
|
// log2(2^16/kMaxBranchLinearSubNodeLength) rounded up.
|
|
/** @internal */
|
|
static const int32_t kMaxSplitBranchLevels=14;
|
|
|
|
/**
|
|
* Makes sure that there is only one unique node registered that is
|
|
* equivalent to newNode.
|
|
* @param newNode Input node. The builder takes ownership.
|
|
* @param errorCode ICU in/out UErrorCode.
|
|
Set to U_MEMORY_ALLOCATION_ERROR if it was success but newNode==NULL.
|
|
* @return newNode if it is the first of its kind, or
|
|
* an equivalent node if newNode is a duplicate.
|
|
* @internal
|
|
*/
|
|
Node *registerNode(Node *newNode, UErrorCode &errorCode);
|
|
/**
|
|
* Makes sure that there is only one unique FinalValueNode registered
|
|
* with this value.
|
|
* Avoids creating a node if the value is a duplicate.
|
|
* @param value A final value.
|
|
* @param errorCode ICU in/out UErrorCode.
|
|
Set to U_MEMORY_ALLOCATION_ERROR if it was success but newNode==NULL.
|
|
* @return A FinalValueNode with the given value.
|
|
* @internal
|
|
*/
|
|
Node *registerFinalValue(int32_t value, UErrorCode &errorCode);
|
|
#endif /* U_HIDE_INTERNAL_API */
|
|
|
|
/*
|
|
* C++ note:
|
|
* registerNode() and registerFinalValue() take ownership of their input nodes,
|
|
* and only return owned nodes.
|
|
* If they see a failure UErrorCode, they will delete the input node.
|
|
* If they get a NULL pointer, they will record a U_MEMORY_ALLOCATION_ERROR.
|
|
* If there is a failure, they return NULL.
|
|
*
|
|
* NULL Node pointers can be safely passed into other Nodes because
|
|
* they call the static Node::hashCode() which checks for a NULL pointer first.
|
|
*
|
|
* Therefore, as long as builder functions register a new node,
|
|
* they need to check for failures only before explicitly dereferencing
|
|
* a Node pointer, or before setting a new UErrorCode.
|
|
*/
|
|
|
|
// Hash set of nodes, maps from nodes to integer 1.
|
|
/** @internal */
|
|
UHashtable *nodes;
|
|
|
|
// Do not conditionalize the following with #ifndef U_HIDE_INTERNAL_API,
|
|
// it is needed for layout of other objects.
|
|
/**
|
|
* @internal
|
|
* \cond
|
|
*/
|
|
class Node : public UObject {
|
|
public:
|
|
Node(int32_t initialHash) : hash(initialHash), offset(0) {}
|
|
inline int32_t hashCode() const { return hash; }
|
|
// Handles node==NULL.
|
|
static inline int32_t hashCode(const Node *node) { return node==NULL ? 0 : node->hashCode(); }
|
|
// Base class operator==() compares the actual class types.
|
|
virtual UBool operator==(const Node &other) const;
|
|
inline UBool operator!=(const Node &other) const { return !operator==(other); }
|
|
/**
|
|
* Traverses the Node graph and numbers branch edges, with rightmost edges first.
|
|
* This is to avoid writing a duplicate node twice.
|
|
*
|
|
* Branch nodes in this trie data structure are not symmetric.
|
|
* Most branch edges "jump" to other nodes but the rightmost branch edges
|
|
* just continue without a jump.
|
|
* Therefore, write() must write the rightmost branch edge last
|
|
* (trie units are written backwards), and must write it at that point even if
|
|
* it is a duplicate of a node previously written elsewhere.
|
|
*
|
|
* This function visits and marks right branch edges first.
|
|
* Edges are numbered with increasingly negative values because we share the
|
|
* offset field which gets positive values when nodes are written.
|
|
* A branch edge also remembers the first number for any of its edges.
|
|
*
|
|
* When a further-left branch edge has a number in the range of the rightmost
|
|
* edge's numbers, then it will be written as part of the required right edge
|
|
* and we can avoid writing it first.
|
|
*
|
|
* After root.markRightEdgesFirst(-1) the offsets of all nodes are negative
|
|
* edge numbers.
|
|
*
|
|
* @param edgeNumber The first edge number for this node and its sub-nodes.
|
|
* @return An edge number that is at least the maximum-negative
|
|
* of the input edge number and the numbers of this node and all of its sub-nodes.
|
|
*/
|
|
virtual int32_t markRightEdgesFirst(int32_t edgeNumber);
|
|
// write() must set the offset to a positive value.
|
|
virtual void write(StringTrieBuilder &builder) = 0;
|
|
// See markRightEdgesFirst.
|
|
inline void writeUnlessInsideRightEdge(int32_t firstRight, int32_t lastRight,
|
|
StringTrieBuilder &builder) {
|
|
// Note: Edge numbers are negative, lastRight<=firstRight.
|
|
// If offset>0 then this node and its sub-nodes have been written already
|
|
// and we need not write them again.
|
|
// If this node is part of the unwritten right branch edge,
|
|
// then we wait until that is written.
|
|
if(offset<0 && (offset<lastRight || firstRight<offset)) {
|
|
write(builder);
|
|
}
|
|
}
|
|
inline int32_t getOffset() const { return offset; }
|
|
protected:
|
|
int32_t hash;
|
|
int32_t offset;
|
|
};
|
|
|
|
#ifndef U_HIDE_INTERNAL_API
|
|
// This class should not be overridden because
|
|
// registerFinalValue() compares a stack-allocated FinalValueNode
|
|
// (stack-allocated so that we don't unnecessarily create lots of duplicate nodes)
|
|
// with the input node, and the
|
|
// !Node::operator==(other) used inside FinalValueNode::operator==(other)
|
|
// will be false if the typeid's are different.
|
|
/** @internal */
|
|
class FinalValueNode : public Node {
|
|
public:
|
|
FinalValueNode(int32_t v) : Node(0x111111u*37u+v), value(v) {}
|
|
virtual UBool operator==(const Node &other) const;
|
|
virtual void write(StringTrieBuilder &builder);
|
|
protected:
|
|
int32_t value;
|
|
};
|
|
#endif /* U_HIDE_INTERNAL_API */
|
|
|
|
// Do not conditionalize the following with #ifndef U_HIDE_INTERNAL_API,
|
|
// it is needed for layout of other objects.
|
|
/**
|
|
* @internal
|
|
*/
|
|
class ValueNode : public Node {
|
|
public:
|
|
ValueNode(int32_t initialHash) : Node(initialHash), hasValue(FALSE), value(0) {}
|
|
virtual UBool operator==(const Node &other) const;
|
|
void setValue(int32_t v) {
|
|
hasValue=TRUE;
|
|
value=v;
|
|
hash=hash*37u+v;
|
|
}
|
|
protected:
|
|
UBool hasValue;
|
|
int32_t value;
|
|
};
|
|
|
|
#ifndef U_HIDE_INTERNAL_API
|
|
/**
|
|
* @internal
|
|
*/
|
|
class IntermediateValueNode : public ValueNode {
|
|
public:
|
|
IntermediateValueNode(int32_t v, Node *nextNode)
|
|
: ValueNode(0x222222u*37u+hashCode(nextNode)), next(nextNode) { setValue(v); }
|
|
virtual UBool operator==(const Node &other) const;
|
|
virtual int32_t markRightEdgesFirst(int32_t edgeNumber);
|
|
virtual void write(StringTrieBuilder &builder);
|
|
protected:
|
|
Node *next;
|
|
};
|
|
#endif /* U_HIDE_INTERNAL_API */
|
|
|
|
// Do not conditionalize the following with #ifndef U_HIDE_INTERNAL_API,
|
|
// it is needed for layout of other objects.
|
|
/**
|
|
* @internal
|
|
*/
|
|
class LinearMatchNode : public ValueNode {
|
|
public:
|
|
LinearMatchNode(int32_t len, Node *nextNode)
|
|
: ValueNode((0x333333u*37u+len)*37u+hashCode(nextNode)),
|
|
length(len), next(nextNode) {}
|
|
virtual UBool operator==(const Node &other) const;
|
|
virtual int32_t markRightEdgesFirst(int32_t edgeNumber);
|
|
protected:
|
|
int32_t length;
|
|
Node *next;
|
|
};
|
|
|
|
#ifndef U_HIDE_INTERNAL_API
|
|
/**
|
|
* @internal
|
|
*/
|
|
class BranchNode : public Node {
|
|
public:
|
|
BranchNode(int32_t initialHash) : Node(initialHash) {}
|
|
protected:
|
|
int32_t firstEdgeNumber;
|
|
};
|
|
|
|
/**
|
|
* @internal
|
|
*/
|
|
class ListBranchNode : public BranchNode {
|
|
public:
|
|
ListBranchNode() : BranchNode(0x444444), length(0) {}
|
|
virtual UBool operator==(const Node &other) const;
|
|
virtual int32_t markRightEdgesFirst(int32_t edgeNumber);
|
|
virtual void write(StringTrieBuilder &builder);
|
|
// Adds a unit with a final value.
|
|
void add(int32_t c, int32_t value) {
|
|
units[length]=(char16_t)c;
|
|
equal[length]=NULL;
|
|
values[length]=value;
|
|
++length;
|
|
hash=(hash*37u+c)*37u+value;
|
|
}
|
|
// Adds a unit which leads to another match node.
|
|
void add(int32_t c, Node *node) {
|
|
units[length]=(char16_t)c;
|
|
equal[length]=node;
|
|
values[length]=0;
|
|
++length;
|
|
hash=(hash*37u+c)*37u+hashCode(node);
|
|
}
|
|
protected:
|
|
Node *equal[kMaxBranchLinearSubNodeLength]; // NULL means "has final value".
|
|
int32_t length;
|
|
int32_t values[kMaxBranchLinearSubNodeLength];
|
|
char16_t units[kMaxBranchLinearSubNodeLength];
|
|
};
|
|
|
|
/**
|
|
* @internal
|
|
*/
|
|
class SplitBranchNode : public BranchNode {
|
|
public:
|
|
SplitBranchNode(char16_t middleUnit, Node *lessThanNode, Node *greaterOrEqualNode)
|
|
: BranchNode(((0x555555u*37u+middleUnit)*37u+
|
|
hashCode(lessThanNode))*37u+hashCode(greaterOrEqualNode)),
|
|
unit(middleUnit), lessThan(lessThanNode), greaterOrEqual(greaterOrEqualNode) {}
|
|
virtual UBool operator==(const Node &other) const;
|
|
virtual int32_t markRightEdgesFirst(int32_t edgeNumber);
|
|
virtual void write(StringTrieBuilder &builder);
|
|
protected:
|
|
char16_t unit;
|
|
Node *lessThan;
|
|
Node *greaterOrEqual;
|
|
};
|
|
|
|
// Branch head node, for writing the actual node lead unit.
|
|
/** @internal */
|
|
class BranchHeadNode : public ValueNode {
|
|
public:
|
|
BranchHeadNode(int32_t len, Node *subNode)
|
|
: ValueNode((0x666666u*37u+len)*37u+hashCode(subNode)),
|
|
length(len), next(subNode) {}
|
|
virtual UBool operator==(const Node &other) const;
|
|
virtual int32_t markRightEdgesFirst(int32_t edgeNumber);
|
|
virtual void write(StringTrieBuilder &builder);
|
|
protected:
|
|
int32_t length;
|
|
Node *next; // A branch sub-node.
|
|
};
|
|
|
|
#endif /* U_HIDE_INTERNAL_API */
|
|
/// \endcond
|
|
|
|
/** @internal */
|
|
virtual Node *createLinearMatchNode(int32_t i, int32_t unitIndex, int32_t length,
|
|
Node *nextNode) const = 0;
|
|
|
|
/** @internal */
|
|
virtual int32_t write(int32_t unit) = 0;
|
|
/** @internal */
|
|
virtual int32_t writeElementUnits(int32_t i, int32_t unitIndex, int32_t length) = 0;
|
|
/** @internal */
|
|
virtual int32_t writeValueAndFinal(int32_t i, UBool isFinal) = 0;
|
|
/** @internal */
|
|
virtual int32_t writeValueAndType(UBool hasValue, int32_t value, int32_t node) = 0;
|
|
/** @internal */
|
|
virtual int32_t writeDeltaTo(int32_t jumpTarget) = 0;
|
|
};
|
|
|
|
U_NAMESPACE_END
|
|
|
|
#endif /* U_SHOW_CPLUSPLUS_API */
|
|
|
|
#endif // __STRINGTRIEBUILDER_H__
|