Move ICU headers from public/{common,i18n} to source/{common,i18n}

public/i18n/unicode/stsearch.h

Index: public/i18n/unicode/stsearch.h
diff --git a/public/i18n/unicode/stsearch.h b/public/i18n/unicode/stsearch.h
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-/*
-**********************************************************************
-*   Copyright (C) 2001-2008 IBM and others. All rights reserved.
-**********************************************************************
-*   Date        Name        Description
-*  03/22/2000   helena      Creation.
-**********************************************************************
-*/
-
-#ifndef STSEARCH_H
-#define STSEARCH_H
-
-#include "unicode/utypes.h"
-
-/**
- * \file 
- * \brief C++ API: Service for searching text based on RuleBasedCollator.
- */
- 
-#if !UCONFIG_NO_COLLATION && !UCONFIG_NO_BREAK_ITERATION
-
-#include "unicode/tblcoll.h"
-#include "unicode/coleitr.h"
-#include "unicode/search.h"
-
-U_NAMESPACE_BEGIN
-
-/** 
- *
- * <tt>StringSearch</tt> is a <tt>SearchIterator</tt> that provides
- * language-sensitive text searching based on the comparison rules defined
- * in a {@link RuleBasedCollator} object.
- * StringSearch ensures that language eccentricity can be 
- * handled, e.g. for the German collator, characters &szlig; and SS will be matched 
- * if case is chosen to be ignored.
- * See the <a href="http://source.icu-project.org/repos/icu/icuhtml/trunk/design/collation/ICU_collation_design.htm">
- * "ICU Collation Design Document"</a> for more information.
- * <p> 
- * The algorithm implemented is a modified form of the Boyer Moore's search.
- * For more information  see 
- * <a href="http://icu-project.org/docs/papers/efficient_text_searching_in_java.html">
- * "Efficient Text Searching in Java"</a>, published in <i>Java Report</i> 
- * in February, 1999, for further information on the algorithm.
- * <p>
- * There are 2 match options for selection:<br>
- * Let S' be the sub-string of a text string S between the offsets start and 
- * end <start, end>.
- * <br>
- * A pattern string P matches a text string S at the offsets <start, end> 
- * if
- * <pre> 
- * option 1. Some canonical equivalent of P matches some canonical equivalent 
- *           of S'
- * option 2. P matches S' and if P starts or ends with a combining mark, 
- *           there exists no non-ignorable combining mark before or after S? 
- *           in S respectively. 
- * </pre>
- * Option 2. will be the default.
- * <p>
- * This search has APIs similar to that of other text iteration mechanisms 
- * such as the break iterators in <tt>BreakIterator</tt>. Using these 
- * APIs, it is easy to scan through text looking for all occurances of 
- * a given pattern. This search iterator allows changing of direction by 
- * calling a <tt>reset</tt> followed by a <tt>next</tt> or <tt>previous</tt>. 
- * Though a direction change can occur without calling <tt>reset</tt> first,  
- * this operation comes with some speed penalty.
- * Match results in the forward direction will match the result matches in 
- * the backwards direction in the reverse order
- * <p>
- * <tt>SearchIterator</tt> provides APIs to specify the starting position 
- * within the text string to be searched, e.g. <tt>setOffset</tt>,
- * <tt>preceding</tt> and <tt>following</tt>. Since the 
- * starting position will be set as it is specified, please take note that 
- * there are some danger points which the search may render incorrect 
- * results:
- * <ul>
- * <li> The midst of a substring that requires normalization.
- * <li> If the following match is to be found, the position should not be the
- *      second character which requires to be swapped with the preceding 
- *      character. Vice versa, if the preceding match is to be found, 
- *      position to search from should not be the first character which 
- *      requires to be swapped with the next character. E.g certain Thai and
- *      Lao characters require swapping.
- * <li> If a following pattern match is to be found, any position within a 
- *      contracting sequence except the first will fail. Vice versa if a 
- *      preceding pattern match is to be found, a invalid starting point 
- *      would be any character within a contracting sequence except the last.
- * </ul>
- * <p>
- * A breakiterator can be used if only matches at logical breaks are desired.
- * Using a breakiterator will only give you results that exactly matches the
- * boundaries given by the breakiterator. For instance the pattern "e" will
- * not be found in the string "\u00e9" if a character break iterator is used.
- * <p>
- * Options are provided to handle overlapping matches. 
- * E.g. In English, overlapping matches produces the result 0 and 2 
- * for the pattern "abab" in the text "ababab", where else mutually 
- * exclusive matches only produce the result of 0.
- * <p>
- * Though collator attributes will be taken into consideration while 
- * performing matches, there are no APIs here for setting and getting the 
- * attributes. These attributes can be set by getting the collator
- * from <tt>getCollator</tt> and using the APIs in <tt>coll.h</tt>.
- * Lastly to update StringSearch to the new collator attributes, 
- * reset() has to be called.
- * <p> 
- * Restriction: <br>
- * Currently there are no composite characters that consists of a
- * character with combining class > 0 before a character with combining 
- * class == 0. However, if such a character exists in the future,  
- * StringSearch does not guarantee the results for option 1.
- * <p>
- * Consult the <tt>SearchIterator</tt> documentation for information on
- * and examples of how to use instances of this class to implement text
- * searching.
- * <pre><code>
- * UnicodeString target("The quick brown fox jumps over the lazy dog.");
- * UnicodeString pattern("fox");
- *
- * UErrorCode      error = U_ZERO_ERROR;
- * StringSearch iter(pattern, target, Locale::getUS(), NULL, status);
- * for (int pos = iter.first(error);
- *      pos != USEARCH_DONE; 
- *      pos = iter.next(error))
- * {
- *     printf("Found match at %d pos, length is %d\n", pos, 
- *                                             iter.getMatchLength());
- * }
- * </code></pre>
- * <p>
- * Note, StringSearch is not to be subclassed.
- * </p>
- * @see SearchIterator
- * @see RuleBasedCollator
- * @since ICU 2.0
- */
-
-class U_I18N_API StringSearch : public SearchIterator
-{
-public:
-
-    // public constructors and destructors --------------------------------
-
-    /**
-     * Creating a <tt>StringSearch</tt> instance using the argument locale 
-     * language rule set. A collator will be created in the process, which 
-     * will be owned by this instance and will be deleted during 
-     * destruction
-     * @param pattern The text for which this object will search.
-     * @param text    The text in which to search for the pattern.
-     * @param locale  A locale which defines the language-sensitive 
-     *                comparison rules used to determine whether text in the 
-     *                pattern and target matches. 
-     * @param breakiter A <tt>BreakIterator</tt> object used to constrain 
-     *                the matches that are found. Matches whose start and end 
-     *                indices in the target text are not boundaries as 
-     *                determined by the <tt>BreakIterator</tt> are 
-     *                ignored. If this behavior is not desired, 
-     *                <tt>NULL</tt> can be passed in instead.
-     * @param status  for errors if any. If pattern or text is NULL, or if
-     *               either the length of pattern or text is 0 then an 
-     *               U_ILLEGAL_ARGUMENT_ERROR is returned.
-     * @stable ICU 2.0
-     */
-    StringSearch(const UnicodeString &pattern, const UnicodeString &text,
-                 const Locale        &locale,       
-                       BreakIterator *breakiter,
-                       UErrorCode    &status);
-
-    /**
-     * Creating a <tt>StringSearch</tt> instance using the argument collator 
-     * language rule set. Note, user retains the ownership of this collator, 
-     * it does not get destroyed during this instance's destruction.
-     * @param pattern The text for which this object will search.
-     * @param text    The text in which to search for the pattern.
-     * @param coll    A <tt>RuleBasedCollator</tt> object which defines 
-     *                the language-sensitive comparison rules used to 
-     *                determine whether text in the pattern and target 
-     *                matches. User is responsible for the clearing of this
-     *                object.
-     * @param breakiter A <tt>BreakIterator</tt> object used to constrain 
-     *                the matches that are found. Matches whose start and end 
-     *                indices in the target text are not boundaries as 
-     *                determined by the <tt>BreakIterator</tt> are 
-     *                ignored. If this behavior is not desired, 
-     *                <tt>NULL</tt> can be passed in instead.
-     * @param status for errors if any. If either the length of pattern or 
-     *               text is 0 then an U_ILLEGAL_ARGUMENT_ERROR is returned.
-     * @stable ICU 2.0
-     */
-    StringSearch(const UnicodeString     &pattern, 
-                 const UnicodeString     &text,
-                       RuleBasedCollator *coll,       
-                       BreakIterator     *breakiter,
-                       UErrorCode        &status);
-
-    /**
-     * Creating a <tt>StringSearch</tt> instance using the argument locale 
-     * language rule set. A collator will be created in the process, which 
-     * will be owned by this instance and will be deleted during 
-     * destruction
-     * <p>
-     * Note: No parsing of the text within the <tt>CharacterIterator</tt> 
-     * will be done during searching for this version. The block of text 
-     * in <tt>CharacterIterator</tt> will be used as it is.
-     * @param pattern The text for which this object will search.
-     * @param text    The text iterator in which to search for the pattern.
-     * @param locale  A locale which defines the language-sensitive 
-     *                comparison rules used to determine whether text in the 
-     *                pattern and target matches. User is responsible for 
-     *                the clearing of this object.
-     * @param breakiter A <tt>BreakIterator</tt> object used to constrain 
-     *                the matches that are found. Matches whose start and end 
-     *                indices in the target text are not boundaries as 
-     *                determined by the <tt>BreakIterator</tt> are 
-     *                ignored. If this behavior is not desired, 
-     *                <tt>NULL</tt> can be passed in instead.
-     * @param status for errors if any. If either the length of pattern or 
-     *               text is 0 then an U_ILLEGAL_ARGUMENT_ERROR is returned.
-     * @stable ICU 2.0
-     */
-    StringSearch(const UnicodeString &pattern, CharacterIterator &text,
-                 const Locale        &locale, 
-                       BreakIterator *breakiter,
-                       UErrorCode    &status);
-
-    /**
-     * Creating a <tt>StringSearch</tt> instance using the argument collator 
-     * language rule set. Note, user retains the ownership of this collator, 
-     * it does not get destroyed during this instance's destruction.
-     * <p>
-     * Note: No parsing of the text within the <tt>CharacterIterator</tt> 
-     * will be done during searching for this version. The block of text 
-     * in <tt>CharacterIterator</tt> will be used as it is.
-     * @param pattern The text for which this object will search.
-     * @param text    The text in which to search for the pattern.
-     * @param coll    A <tt>RuleBasedCollator</tt> object which defines 
-     *                the language-sensitive comparison rules used to 
-     *                determine whether text in the pattern and target 
-     *                matches. User is responsible for the clearing of this
-     *                object.
-     * @param breakiter A <tt>BreakIterator</tt> object used to constrain 
-     *                the matches that are found. Matches whose start and end 
-     *                indices in the target text are not boundaries as 
-     *                determined by the <tt>BreakIterator</tt> are 
-     *                ignored. If this behavior is not desired, 
-     *                <tt>NULL</tt> can be passed in instead.
-     * @param status for errors if any. If either the length of pattern or 
-     *               text is 0 then an U_ILLEGAL_ARGUMENT_ERROR is returned.
-     * @stable ICU 2.0
-     */
-    StringSearch(const UnicodeString     &pattern, CharacterIterator &text,
-                       RuleBasedCollator *coll, 
-                       BreakIterator     *breakiter,
-                       UErrorCode        &status);
-
-    /**
-     * Copy constructor that creates a StringSearch instance with the same 
-     * behavior, and iterating over the same text.
-     * @param that StringSearch instance to be copied.
-     * @stable ICU 2.0
-     */
-    StringSearch(const StringSearch &that);
-
-    /**
-    * Destructor. Cleans up the search iterator data struct.
-    * If a collator is created in the constructor, it will be destroyed here.
-    * @stable ICU 2.0
-    */
-    virtual ~StringSearch(void);
-
-    /**
-     * Clone this object.
-     * Clones can be used concurrently in multiple threads.
-     * If an error occurs, then NULL is returned.
-     * The caller must delete the clone.
-     *
-     * @return a clone of this object
-     *
-     * @see getDynamicClassID
-     * @stable ICU 2.8
-     */
-    StringSearch *clone() const;
-
-    // operator overloading ---------------------------------------------
-
-    /**
-     * Assignment operator. Sets this iterator to have the same behavior,
-     * and iterate over the same text, as the one passed in.
-     * @param that instance to be copied.
-     * @stable ICU 2.0
-     */
-    StringSearch & operator=(const StringSearch &that);
-
-    /**
-     * Equality operator. 
-     * @param that instance to be compared.
-     * @return TRUE if both instances have the same attributes, 
-     *         breakiterators, collators and iterate over the same text 
-     *         while looking for the same pattern.
-     * @stable ICU 2.0
-     */
-    virtual UBool operator==(const SearchIterator &that) const;
-
-    // public get and set methods ----------------------------------------
-
-    /**
-     * Sets the index to point to the given position, and clears any state 
-     * that's affected.
-     * <p>
-     * This method takes the argument index and sets the position in the text 
-     * string accordingly without checking if the index is pointing to a 
-     * valid starting point to begin searching. 
-     * @param position within the text to be set. If position is less
-     *          than or greater than the text range for searching, 
-     *          an U_INDEX_OUTOFBOUNDS_ERROR will be returned
-     * @param status for errors if it occurs
-     * @stable ICU 2.0
-     */
-    virtual void setOffset(int32_t position, UErrorCode &status);
-
-    /**
-     * Return the current index in the text being searched.
-     * If the iteration has gone past the end of the text
-     * (or past the beginning for a backwards search), USEARCH_DONE
-     * is returned.
-     * @return current index in the text being searched.
-     * @stable ICU 2.0
-     */
-    virtual int32_t getOffset(void) const;
-
-    /**
-     * Set the target text to be searched.
-     * Text iteration will hence begin at the start of the text string. 
-     * This method is 
-     * useful if you want to re-use an iterator to search for the same 
-     * pattern within a different body of text.
-     * @param text text string to be searched
-     * @param status for errors if any. If the text length is 0 then an 
-     *        U_ILLEGAL_ARGUMENT_ERROR is returned.
-     * @stable ICU 2.0
-     */
-    virtual void setText(const UnicodeString &text, UErrorCode &status);
-    
-    /**
-     * Set the target text to be searched.
-     * Text iteration will hence begin at the start of the text string. 
-     * This method is 
-     * useful if you want to re-use an iterator to search for the same 
-     * pattern within a different body of text.
-     * Note: No parsing of the text within the <tt>CharacterIterator</tt> 
-     * will be done during searching for this version. The block of text 
-     * in <tt>CharacterIterator</tt> will be used as it is.
-     * @param text text string to be searched
-     * @param status for errors if any. If the text length is 0 then an 
-     *        U_ILLEGAL_ARGUMENT_ERROR is returned.
-     * @stable ICU 2.0
-     */
-    virtual void setText(CharacterIterator &text, UErrorCode &status);
-
-    /**
-     * Gets the collator used for the language rules.
-     * <p>
-     * Caller may modify but <b>must not</b> delete the <tt>RuleBasedCollator</tt>!
-     * Modifications to this collator will affect the original collator passed in to 
-     * the <tt>StringSearch></tt> constructor or to setCollator, if any.
-     * @return collator used for string search
-     * @stable ICU 2.0
-     */
-    RuleBasedCollator * getCollator() const;
-    
-    /**
-     * Sets the collator used for the language rules. User retains the 
-     * ownership of this collator, thus the responsibility of deletion lies 
-     * with the user. This method causes internal data such as Boyer-Moore 
-     * shift tables to be recalculated, but the iterator's position is 
-     * unchanged.
-     * @param coll    collator 
-     * @param status  for errors if any
-     * @stable ICU 2.0
-     */
-    void setCollator(RuleBasedCollator *coll, UErrorCode &status);
-    
-    /**
-     * Sets the pattern used for matching.
-     * Internal data like the Boyer Moore table will be recalculated, but 
-     * the iterator's position is unchanged.
-     * @param pattern search pattern to be found
-     * @param status for errors if any. If the pattern length is 0 then an 
-     *               U_ILLEGAL_ARGUMENT_ERROR is returned.
-     * @stable ICU 2.0
-     */
-    void setPattern(const UnicodeString &pattern, UErrorCode &status);
-    
-    /**
-     * Gets the search pattern.
-     * @return pattern used for matching
-     * @stable ICU 2.0
-     */
-    const UnicodeString & getPattern() const;
-
-    // public methods ----------------------------------------------------
-
-    /** 
-     * Reset the iteration.
-     * Search will begin at the start of the text string if a forward 
-     * iteration is initiated before a backwards iteration. Otherwise if 
-     * a backwards iteration is initiated before a forwards iteration, the 
-     * search will begin at the end of the text string.
-     * @stable ICU 2.0
-     */
-    virtual void reset();
-
-    /**
-     * Returns a copy of StringSearch with the same behavior, and 
-     * iterating over the same text, as this one. Note that all data will be
-     * replicated, except for the user-specified collator and the
-     * breakiterator.
-     * @return cloned object
-     * @stable ICU 2.0
-     */
-    virtual SearchIterator * safeClone(void) const;
-    
-    /**
-     * ICU "poor man's RTTI", returns a UClassID for the actual class.
-     *
-     * @stable ICU 2.2
-     */
-    virtual UClassID getDynamicClassID() const;
-
-    /**
-     * ICU "poor man's RTTI", returns a UClassID for this class.
-     *
-     * @stable ICU 2.2
-     */
-    static UClassID U_EXPORT2 getStaticClassID();
-
-protected:
-
-    // protected method -------------------------------------------------
-
-    /**
-     * Search forward for matching text, starting at a given location.
-     * Clients should not call this method directly; instead they should 
-     * call {@link SearchIterator#next }.
-     * <p>
-     * If a match is found, this method returns the index at which the match
-     * starts and calls {@link SearchIterator#setMatchLength } with the number 
-     * of characters in the target text that make up the match. If no match 
-     * is found, the method returns <tt>USEARCH_DONE</tt>.
-     * <p>
-     * The <tt>StringSearch</tt> is adjusted so that its current index 
-     * (as returned by {@link #getOffset }) is the match position if one was 
-     * found.
-     * If a match is not found, <tt>USEARCH_DONE</tt> will be returned and
-     * the <tt>StringSearch</tt> will be adjusted to the index USEARCH_DONE.
-     * @param position The index in the target text at which the search 
-     *                 starts
-     * @param status for errors if any occurs
-     * @return The index at which the matched text in the target starts, or 
-     *         USEARCH_DONE if no match was found.
-     * @stable ICU 2.0
-     */
-    virtual int32_t handleNext(int32_t position, UErrorCode &status);
-
-    /**
-     * Search backward for matching text, starting at a given location.
-     * Clients should not call this method directly; instead they should call
-     * <tt>SearchIterator.previous()</tt>, which this method overrides.
-     * <p>
-     * If a match is found, this method returns the index at which the match
-     * starts and calls {@link SearchIterator#setMatchLength } with the number 
-     * of characters in the target text that make up the match. If no match 
-     * is found, the method returns <tt>USEARCH_DONE</tt>.
-     * <p>
-     * The <tt>StringSearch</tt> is adjusted so that its current index 
-     * (as returned by {@link #getOffset }) is the match position if one was 
-     * found.
-     * If a match is not found, <tt>USEARCH_DONE</tt> will be returned and
-     * the <tt>StringSearch</tt> will be adjusted to the index USEARCH_DONE.
-     * @param position The index in the target text at which the search 
-     *                 starts.
-     * @param status for errors if any occurs
-     * @return The index at which the matched text in the target starts, or 
-     *         USEARCH_DONE if no match was found.
-     * @stable ICU 2.0
-     */
-    virtual int32_t handlePrev(int32_t position, UErrorCode &status);
-    
-private :
-    StringSearch(); // default constructor not implemented
-
-    // private data members ----------------------------------------------
-
-    /**
-    * RuleBasedCollator, contains exactly the same UCollator * in m_strsrch_
-    * @stable ICU 2.0
-    */
-    RuleBasedCollator  m_collator_;
-    /**
-    * Pattern text
-    * @stable ICU 2.0
-    */
-    UnicodeString      m_pattern_;
-    /**
-    * String search struct data
-    * @stable ICU 2.0
-    */
-    UStringSearch     *m_strsrch_;
-
-};
-
-U_NAMESPACE_END
-
-#endif /* #if !UCONFIG_NO_COLLATION */
-
-#endif
-