596 lines
17 KiB
C++
596 lines
17 KiB
C++
//
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// file: repattrn.cpp
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//
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/*
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***************************************************************************
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* Copyright (C) 2002-2003 International Business Machines Corporation *
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* and others. All rights reserved. *
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***************************************************************************
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*/
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#include "unicode/utypes.h"
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#if !UCONFIG_NO_REGULAR_EXPRESSIONS
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#include "unicode/regex.h"
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#include "uassert.h"
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#include "uvector.h"
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#include "uvectr32.h"
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#include "regexcmp.h"
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#include "regeximp.h"
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U_NAMESPACE_BEGIN
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//--------------------------------------------------------------------------
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//
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// RegexPattern Default Constructor
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//
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//--------------------------------------------------------------------------
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RegexPattern::RegexPattern() {
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init();
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};
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//--------------------------------------------------------------------------
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//
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// Copy Constructor Note: This is a rather inefficient implementation,
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// but it probably doesn't matter.
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//
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//--------------------------------------------------------------------------
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RegexPattern::RegexPattern(const RegexPattern &other) : UObject(other) {
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init();
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*this = other;
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}
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//--------------------------------------------------------------------------
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//
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// Assignmenet Operator
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//
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//--------------------------------------------------------------------------
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RegexPattern &RegexPattern::operator = (const RegexPattern &other) {
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if (this == &other) {
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// Source and destination are the same. Don't do anything.
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return *this;
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}
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// Clean out any previous contents of object being assigned to.
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zap();
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// Give target object a default initialization
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init();
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// Copy simple fields
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fPattern = other.fPattern;
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fFlags = other.fFlags;
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fLiteralText = other.fLiteralText;
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fDeferredStatus = other.fDeferredStatus;
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fMinMatchLen = other.fMinMatchLen;
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fMaxCaptureDigits = other.fMaxCaptureDigits;
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fStaticSets = other.fStaticSets;
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fStartType = other.fStartType;
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fInitialStringIdx = other.fInitialStringIdx;
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fInitialStringLen = other.fInitialStringLen;
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*fInitialChars = *other.fInitialChars;
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*fInitialChars8 = *other.fInitialChars8;
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fInitialChar = other.fInitialChar;
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// Copy the pattern. It's just values, nothing deep to copy.
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fCompiledPat->assign(*other.fCompiledPat, fDeferredStatus);
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fGroupMap->assign(*other.fGroupMap, fDeferredStatus);
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// Copy the Unicode Sets.
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// Could be made more efficient if the sets were reference counted and shared,
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// but I doubt that pattern copying will be particularly common.
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// Note: init() already added an empty element zero to fSets
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int32_t i;
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int32_t numSets = other.fSets->size();
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fSets8 = new Regex8BitSet[numSets];
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for (i=1; i<numSets; i++) {
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if (U_FAILURE(fDeferredStatus)) {
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return *this;
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}
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UnicodeSet *sourceSet = (UnicodeSet *)other.fSets->elementAt(i);
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UnicodeSet *newSet = new UnicodeSet(*sourceSet);
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if (newSet == NULL) {
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fDeferredStatus = U_MEMORY_ALLOCATION_ERROR;
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break;
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}
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fSets->addElement(newSet, fDeferredStatus);
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fSets8[i] = other.fSets8[i];
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}
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return *this;
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}
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//--------------------------------------------------------------------------
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//
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// init Shared initialization for use by constructors.
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// Bring an uninitialized RegexPattern up to a default state.
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//
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//--------------------------------------------------------------------------
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void RegexPattern::init() {
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fFlags = 0;
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fDeferredStatus = U_ZERO_ERROR;
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fMinMatchLen = 0;
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fMaxCaptureDigits = 1;
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fStaticSets = NULL;
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fFrameSize = 0;
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fDataSize = 0;
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fStartType = START_NO_INFO;
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fInitialStringIdx = 0;
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fInitialStringLen = 0;
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fInitialChars = NULL;
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fInitialChars8 = NULL;
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fInitialChar = 0;
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fSets8 = NULL;
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fCompiledPat = new UVector32(fDeferredStatus);
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fGroupMap = new UVector32(fDeferredStatus);
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fSets = new UVector(fDeferredStatus);
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fInitialChars = new UnicodeSet;
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fInitialChars8 = new Regex8BitSet;
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if (U_FAILURE(fDeferredStatus)) {
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return;
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}
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if (fCompiledPat == NULL || fGroupMap == NULL || fSets == NULL ||
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fInitialChars == NULL || fInitialChars8 == NULL) {
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fDeferredStatus = U_MEMORY_ALLOCATION_ERROR;
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return;
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}
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// Slot zero of the vector of sets is reserved. Fill it here.
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fSets->addElement((int32_t)0, fDeferredStatus);
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}
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//--------------------------------------------------------------------------
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//
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// zap Delete everything owned by this RegexPattern.
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//
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//--------------------------------------------------------------------------
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void RegexPattern::zap() {
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delete fCompiledPat;
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fCompiledPat = NULL;
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int i;
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for (i=1; i<fSets->size(); i++) {
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UnicodeSet *s;
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s = (UnicodeSet *)fSets->elementAt(i);
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if (s != NULL) {
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delete s;
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}
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}
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delete fSets;
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fSets = NULL;
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delete fGroupMap;
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fGroupMap = NULL;
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delete fInitialChars;
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fInitialChars = NULL;
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delete fInitialChars8;
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fInitialChars8 = NULL;
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delete[] fSets8;
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fSets8 = NULL;
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}
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//--------------------------------------------------------------------------
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//
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// Destructor
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//
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//--------------------------------------------------------------------------
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RegexPattern::~RegexPattern() {
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zap();
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};
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//--------------------------------------------------------------------------
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//
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// Clone
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//
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//--------------------------------------------------------------------------
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RegexPattern *RegexPattern::clone() const {
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RegexPattern *copy = new RegexPattern(*this);
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return copy;
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};
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//--------------------------------------------------------------------------
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//
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// operator == (comparison) Consider to patterns to be == if the
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// pattern strings and the flags are the same.
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//
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//--------------------------------------------------------------------------
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UBool RegexPattern::operator ==(const RegexPattern &other) const {
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UBool r = this->fFlags == other.fFlags &&
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this->fPattern == other.fPattern &&
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this->fDeferredStatus == other.fDeferredStatus;
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return r;
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}
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//---------------------------------------------------------------------
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//
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// compile
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//
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//---------------------------------------------------------------------
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RegexPattern *RegexPattern::compile(
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const UnicodeString ®ex,
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uint32_t flags,
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UParseError &pe,
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UErrorCode &status) {
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if (U_FAILURE(status)) {
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return NULL;
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}
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const uint32_t allFlags = UREGEX_CANON_EQ | UREGEX_CASE_INSENSITIVE | UREGEX_COMMENTS |
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UREGEX_DOTALL | UREGEX_MULTILINE;
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if ((flags & ~allFlags) != 0) {
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status = U_REGEX_INVALID_FLAG;
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return NULL;
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}
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if ((flags & UREGEX_CANON_EQ) != 0) {
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status = U_REGEX_UNIMPLEMENTED;
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return NULL;
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}
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RegexPattern *This = new RegexPattern;
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if (This == NULL) {
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status = U_MEMORY_ALLOCATION_ERROR;
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return NULL;
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}
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if (U_FAILURE(This->fDeferredStatus)) {
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status = This->fDeferredStatus;
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return NULL;
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}
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This->fFlags = flags;
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RegexCompile compiler(This, status);
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compiler.compile(regex, pe, status);
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return This;
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};
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//
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// compile with default flags.
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//
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RegexPattern *RegexPattern::compile( const UnicodeString ®ex,
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UParseError &pe,
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UErrorCode &err)
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{
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return compile(regex, 0, pe, err);
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}
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//
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// compile with no UParseErr parameter.
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//
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RegexPattern *RegexPattern::compile( const UnicodeString ®ex,
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uint32_t flags,
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UErrorCode &err)
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{
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UParseError pe;
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return compile(regex, flags, pe, err);
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}
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//---------------------------------------------------------------------
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//
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// flags
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//
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//---------------------------------------------------------------------
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uint32_t RegexPattern::flags() const {
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return fFlags;
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}
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//---------------------------------------------------------------------
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//
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// matcher(UnicodeString, err)
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//
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//---------------------------------------------------------------------
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RegexMatcher *RegexPattern::matcher(const UnicodeString &input,
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UErrorCode &status) const {
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RegexMatcher *retMatcher = matcher(status);
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if (retMatcher != NULL) {
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retMatcher->reset(input);
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}
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return retMatcher;
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};
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//---------------------------------------------------------------------
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//
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// matcher(status)
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//
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//---------------------------------------------------------------------
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RegexMatcher *RegexPattern::matcher(UErrorCode &status) const {
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RegexMatcher *retMatcher = NULL;
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if (U_FAILURE(status)) {
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return NULL;
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}
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if (U_FAILURE(fDeferredStatus)) {
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status = fDeferredStatus;
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return NULL;
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}
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retMatcher = new RegexMatcher(this);
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if (retMatcher == NULL) {
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status = U_MEMORY_ALLOCATION_ERROR;
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return NULL;
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}
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return retMatcher;
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};
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//---------------------------------------------------------------------
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//
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// matches Convenience function to test for a match, starting
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// with a pattern string and a data string.
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//
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//---------------------------------------------------------------------
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UBool RegexPattern::matches(const UnicodeString ®ex,
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const UnicodeString &input,
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UParseError &pe,
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UErrorCode &status) {
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if (U_FAILURE(status)) {return FALSE;}
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UBool retVal;
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RegexPattern *pat = NULL;
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RegexMatcher *matcher = NULL;
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pat = RegexPattern::compile(regex, 0, pe, status);
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matcher = pat->matcher(input, status);
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retVal = matcher->matches(status);
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delete matcher;
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delete pat;
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return retVal;
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}
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//---------------------------------------------------------------------
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//
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// pattern
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//
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//---------------------------------------------------------------------
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UnicodeString RegexPattern::pattern() const {
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return fPattern;
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}
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//---------------------------------------------------------------------
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//
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// split
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//
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//---------------------------------------------------------------------
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int32_t RegexPattern::split(const UnicodeString &input,
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UnicodeString dest[],
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int32_t destCapacity,
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UErrorCode &status) const
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{
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if (U_FAILURE(status)) {
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return 0;
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};
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RegexMatcher m(this);
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int32_t r = m.split(input, dest, destCapacity, status);
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return r;
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}
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//---------------------------------------------------------------------
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//
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// dump Output the compiled form of the pattern.
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// Debugging function only.
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//
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//---------------------------------------------------------------------
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static const char * const opNames[] = {URX_OPCODE_NAMES};
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void RegexPattern::dumpOp(int32_t index) const {
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int32_t op = fCompiledPat->elementAti(index);
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int32_t val = URX_VAL(op);
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int32_t type = URX_TYPE(op);
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int32_t pinnedType = type;
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if (pinnedType >= sizeof(opNames)/sizeof(char *)) {
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pinnedType = 0;
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}
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REGEX_DUMP_DEBUG_PRINTF("%4d %08x %-15s ", index, op, opNames[pinnedType]);
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switch (type) {
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case URX_NOP:
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case URX_DOTANY:
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case URX_DOTANY_ALL:
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case URX_DOTANY_PL:
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case URX_DOTANY_ALL_PL:
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case URX_FAIL:
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case URX_CARET:
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case URX_DOLLAR:
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case URX_BACKSLASH_G:
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case URX_BACKSLASH_X:
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case URX_END:
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case URX_DOLLAR_M:
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case URX_CARET_M:
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// Types with no operand field of interest.
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break;
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case URX_RESERVED_OP:
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case URX_START_CAPTURE:
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case URX_END_CAPTURE:
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case URX_STATE_SAVE:
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case URX_JMP:
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case URX_JMP_SAV:
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case URX_JMP_SAV_X:
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case URX_BACKSLASH_B:
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case URX_BACKSLASH_D:
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case URX_BACKSLASH_Z:
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case URX_STRING_LEN:
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case URX_CTR_INIT:
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case URX_CTR_INIT_NG:
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case URX_CTR_LOOP:
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case URX_CTR_LOOP_NG:
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case URX_RELOC_OPRND:
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case URX_STO_SP:
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case URX_LD_SP:
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case URX_BACKREF:
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case URX_STO_INP_LOC:
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case URX_JMPX:
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case URX_LA_START:
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case URX_LA_END:
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case URX_BACKREF_I:
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case URX_LB_START:
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case URX_LB_CONT:
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case URX_LB_END:
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case URX_LBN_CONT:
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case URX_LBN_END:
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case URX_LOOP_C:
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case URX_LOOP_DOT_I:
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// types with an integer operand field.
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REGEX_DUMP_DEBUG_PRINTF("%d", val);
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break;
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case URX_ONECHAR:
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case URX_ONECHAR_I:
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REGEX_DUMP_DEBUG_PRINTF("%c", val<256?val:'?');
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break;
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case URX_STRING:
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case URX_STRING_I:
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{
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int32_t lengthOp = fCompiledPat->elementAti(index+1);
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U_ASSERT(URX_TYPE(lengthOp) == URX_STRING_LEN);
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int32_t length = URX_VAL(lengthOp);
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int32_t i;
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for (i=val; i<val+length; i++) {
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UChar c = fLiteralText[i];
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if (c < 32 || c >= 256) {c = '.';}
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REGEX_DUMP_DEBUG_PRINTF("%c", c);
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}
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}
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break;
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case URX_SETREF:
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case URX_LOOP_SR_I:
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{
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UnicodeString s;
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UnicodeSet *set = (UnicodeSet *)fSets->elementAt(val);
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set->toPattern(s, TRUE);
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for (int32_t i=0; i<s.length(); i++) {
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REGEX_DUMP_DEBUG_PRINTF("%c", s.charAt(i));
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}
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}
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break;
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case URX_STATIC_SETREF:
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case URX_STAT_SETREF_N:
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{
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UnicodeString s;
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if (val & URX_NEG_SET) {
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REGEX_DUMP_DEBUG_PRINTF("NOT ");
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val &= ~URX_NEG_SET;
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}
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UnicodeSet *set = fStaticSets[val];
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set->toPattern(s, TRUE);
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for (int32_t i=0; i<s.length(); i++) {
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REGEX_DUMP_DEBUG_PRINTF("%c", s.charAt(i));
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}
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}
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break;
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default:
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REGEX_DUMP_DEBUG_PRINTF("??????");
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break;
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}
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REGEX_DUMP_DEBUG_PRINTF("\n");
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}
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void RegexPattern::dump() const {
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int index;
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int i;
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REGEX_DUMP_DEBUG_PRINTF("Original Pattern: ");
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for (i=0; i<fPattern.length(); i++) {
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REGEX_DUMP_DEBUG_PRINTF("%c", fPattern.charAt(i));
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}
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REGEX_DUMP_DEBUG_PRINTF("\n");
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REGEX_DUMP_DEBUG_PRINTF(" Min Match Length: %d\n", fMinMatchLen);
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REGEX_DUMP_DEBUG_PRINTF(" Match Start Type: %s\n", START_OF_MATCH_STR(fStartType));
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if (fStartType == START_STRING) {
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REGEX_DUMP_DEBUG_PRINTF(" Initial match sting: \"");
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for (i=fInitialStringIdx; i<fInitialStringIdx+fInitialStringLen; i++) {
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REGEX_DUMP_DEBUG_PRINTF("%c", fLiteralText[i]); // TODO: non-printables, surrogates.
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}
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} else if (fStartType == START_SET) {
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int32_t numSetChars = fInitialChars->size();
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if (numSetChars > 20) {
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numSetChars = 20;
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}
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REGEX_DUMP_DEBUG_PRINTF(" Match First Chars : ");
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for (i=0; i<numSetChars; i++) {
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UChar32 c = fInitialChars->charAt(i);
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if (0x20<c && c <0x7e) {
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REGEX_DUMP_DEBUG_PRINTF("%c ", c);
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} else {
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REGEX_DUMP_DEBUG_PRINTF("%#x ", c);
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}
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}
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if (numSetChars < fInitialChars->size()) {
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REGEX_DUMP_DEBUG_PRINTF(" ...");
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}
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REGEX_DUMP_DEBUG_PRINTF("\n");
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} else if (fStartType == START_CHAR) {
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REGEX_DUMP_DEBUG_PRINTF(" First char of Match : ");
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if (0x20 < fInitialChar && fInitialChar<0x7e) {
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REGEX_DUMP_DEBUG_PRINTF("%c\n", fInitialChar);
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} else {
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REGEX_DUMP_DEBUG_PRINTF("%#x\n", fInitialChar);
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}
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}
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REGEX_DUMP_DEBUG_PRINTF("\nIndex Binary Type Operand\n"
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"-------------------------------------------\n");
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for (index = 0; index<fCompiledPat->size(); index++) {
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dumpOp(index);
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}
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REGEX_DUMP_DEBUG_PRINTF("\n\n");
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};
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const char RegexPattern::fgClassID = 0;
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//----------------------------------------------------------------------------------
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//
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|
// regex_cleanup Memory cleanup function, free/delete all
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|
// cached memory. Called by ICU's u_cleanup() function.
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|
//
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|
//----------------------------------------------------------------------------------
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|
U_CFUNC UBool
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|
regex_cleanup(void) {
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|
RegexCompile::cleanup();
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|
return TRUE;
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|
};
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U_NAMESPACE_END
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|
#endif // !UCONFIG_NO_REGULAR_EXPRESSIONS
|