The Tor Browser: intl/icu/source/i18n/strmatch.h@fc2d59ddac77 (annotated)

intl/icu/source/i18n/strmatch.h@fc2d59ddac77 (annotated)

intl/icu/source/i18n/strmatch.h

Wed, 31 Dec 2014 07:22:50 +0100

author: Michael Schloh von Bennewitz <michael@schloh.com>
date: Wed, 31 Dec 2014 07:22:50 +0100
branch: TOR_BUG_3246
changeset 4: fc2d59ddac77
permissions: -rw-r--r--

Correct previous dual key logic pending first delivery installment.

 /*
  * Copyright (C) 2001-2011, International Business Machines Corporation
  * and others. All Rights Reserved.
  **********************************************************************
  *   Date        Name        Description
  *   07/23/01    aliu        Creation.
  **********************************************************************
  */
 #ifndef STRMATCH_H
 #define STRMATCH_H
 #include "unicode/utypes.h"
 #if !UCONFIG_NO_TRANSLITERATION
 #include "unicode/unistr.h"
 #include "unicode/unifunct.h"
 #include "unicode/unimatch.h"
 #include "unicode/unirepl.h"
 U_NAMESPACE_BEGIN
 class TransliterationRuleData;
 /**
  * An object that matches a fixed input string, implementing the
  * UnicodeMatcher API.  This object also implements the
  * UnicodeReplacer API, allowing it to emit the matched text as
  * output.  Since the match text may contain flexible match elements,
  * such as UnicodeSets, the emitted text is not the match pattern, but
  * instead a substring of the actual matched text.  Following
  * convention, the output text is the leftmost match seen up to this
  * point.
  *
  * A StringMatcher may represent a segment, in which case it has a
  * positive segment number.  This affects how the matcher converts
  * itself to a pattern but does not otherwise affect its function.
  *
  * A StringMatcher that is not a segment should not be used as a
  * UnicodeReplacer.
  */
 class StringMatcher : public UnicodeFunctor, public UnicodeMatcher, public UnicodeReplacer {
  public:
     /**
      * Construct a matcher that matches the given pattern string.
      * @param string the pattern to be matched, possibly containing
      * stand-ins that represent nested UnicodeMatcher objects.
      * @param start inclusive start index of text to be replaced
      * @param limit exclusive end index of text to be replaced;
      * must be greater than or equal to start
      * @param segmentNum the segment number from 1..n, or 0 if this is
      * not a segment.
      * @param data context object mapping stand-ins to
      * UnicodeMatcher objects.
      */
     StringMatcher(const UnicodeString& string,
                   int32_t start,
                   int32_t limit,
                   int32_t segmentNum,
                   const TransliterationRuleData& data);
     /**
      * Copy constructor
      * @param o  the object to be copied.
      */
     StringMatcher(const StringMatcher& o);
     /**
      * Destructor
      */
     virtual ~StringMatcher();
     /**
      * Implement UnicodeFunctor
      * @return a copy of the object.
      */
     virtual UnicodeFunctor* clone() const;
     /**
      * UnicodeFunctor API.  Cast 'this' to a UnicodeMatcher* pointer
      * and return the pointer.
      * @return the UnicodeMatcher point.
      */
     virtual UnicodeMatcher* toMatcher() const;
     /**
      * UnicodeFunctor API.  Cast 'this' to a UnicodeReplacer* pointer
      * and return the pointer.
      * @return the UnicodeReplacer pointer.
      */
     virtual UnicodeReplacer* toReplacer() const;
     /**
      * Implement UnicodeMatcher
      * @param text the text to be matched
      * @param offset on input, the index into text at which to begin
      * matching.  On output, the limit of the matched text.  The
      * number of matched characters is the output value of offset
      * minus the input value.  Offset should always point to the
      * HIGH SURROGATE (leading code unit) of a pair of surrogates,
      * both on entry and upon return.
      * @param limit the limit index of text to be matched.  Greater
      * than offset for a forward direction match, less than offset for
      * a backward direction match.  The last character to be
      * considered for matching will be text.charAt(limit-1) in the
      * forward direction or text.charAt(limit+1) in the backward
      * direction.
      * @param incremental  if TRUE, then assume further characters may
      * be inserted at limit and check for partial matching.  Otherwise
      * assume the text as given is complete.
      * @return a match degree value indicating a full match, a partial
      * match, or a mismatch.  If incremental is FALSE then
      * U_PARTIAL_MATCH should never be returned.
      */
     virtual UMatchDegree matches(const Replaceable& text,
                                  int32_t& offset,
                                  int32_t limit,
                                  UBool incremental);
     /**
      * Implement UnicodeMatcher
      * @param result            Output param to receive the pattern.
      * @param escapeUnprintable if True then escape the unprintable characters.
      * @return                  A reference to 'result'.
      */
     virtual UnicodeString& toPattern(UnicodeString& result,
                                      UBool escapeUnprintable = FALSE) const;
     /**
      * Implement UnicodeMatcher
      * Returns TRUE if this matcher will match a character c, where c
      * & 0xFF == v, at offset, in the forward direction (with limit >
      * offset).  This is used by <tt>RuleBasedTransliterator</tt> for
      * indexing.
      * @param v    the given value
      * @return     TRUE if this matcher will match a character c,
      *             where c & 0xFF == v
      */
     virtual UBool matchesIndexValue(uint8_t v) const;
     /**
      * Implement UnicodeMatcher
      */
     virtual void addMatchSetTo(UnicodeSet& toUnionTo) const;
     /**
      * Implement UnicodeFunctor
      */
     virtual void setData(const TransliterationRuleData*);
     /**
      * Replace characters in 'text' from 'start' to 'limit' with the
      * output text of this object.  Update the 'cursor' parameter to
      * give the cursor position and return the length of the
      * replacement text.
      *
      * @param text the text to be matched
      * @param start inclusive start index of text to be replaced
      * @param limit exclusive end index of text to be replaced;
      * must be greater than or equal to start
      * @param cursor output parameter for the cursor position.
      * Not all replacer objects will update this, but in a complete
      * tree of replacer objects, representing the entire output side
      * of a transliteration rule, at least one must update it.
      * @return the number of 16-bit code units in the text replacing
      * the characters at offsets start..(limit-1) in text
      */
     virtual int32_t replace(Replaceable& text,
                             int32_t start,
                             int32_t limit,
                             int32_t& cursor);
     /**
      * Returns a string representation of this replacer.  If the
      * result of calling this function is passed to the appropriate
      * parser, typically TransliteratorParser, it will produce another
      * replacer that is equal to this one.
      * @param result the string to receive the pattern.  Previous
      * contents will be deleted.
      * @param escapeUnprintable if TRUE then convert unprintable
      * character to their hex escape representations, \\uxxxx or
      * \\Uxxxxxxxx.  Unprintable characters are defined by
      * Utility.isUnprintable().
      * @return a reference to 'result'.
      */
     virtual UnicodeString& toReplacerPattern(UnicodeString& result,
                                              UBool escapeUnprintable) const;
     /**
      * Remove any match data.  This must be called before performing a
      * set of matches with this segment.
      */
     void resetMatch();
     /**
      * ICU "poor man's RTTI", returns a UClassID for the actual class.
      */
     virtual UClassID getDynamicClassID() const;
     /**
      * ICU "poor man's RTTI", returns a UClassID for this class.
      */
     static UClassID U_EXPORT2 getStaticClassID();
     /**
      * Union the set of all characters that may output by this object
      * into the given set.
      * @param toUnionTo the set into which to union the output characters
      */
     virtual void addReplacementSetTo(UnicodeSet& toUnionTo) const;
  private:
     /**
      * The text to be matched.
      */
     UnicodeString pattern;
     /**
      * Context object that maps stand-ins to matcher and replacer
      * objects.
      */
     const TransliterationRuleData* data;
     /**
      * The segment number, 1-based, or 0 if not a segment.
      */
     int32_t segmentNumber;
     /**
      * Start offset, in the match text, of the <em>rightmost</em>
      * match.
      */
     int32_t matchStart;
     /**
      * Limit offset, in the match text, of the <em>rightmost</em>
      * match.
      */
     int32_t matchLimit;
 };
 U_NAMESPACE_END
 #endif /* #if !UCONFIG_NO_TRANSLITERATION */
 #endif

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intl/icu/source/i18n/strmatch.h@fc2d59ddac77 (annotated)

intl/icu/source/i18n/strmatch.h