uset.h

linux下开源浏览器WebKit的源码,市面上的很多商用浏览器都是移植自WebKit

/*
*******************************************************************************
*
*   Copyright (C) 2002-2004, International Business Machines
*   Corporation and others.  All Rights Reserved.
*
*******************************************************************************
*   file name:  uset.h
*   encoding:   US-ASCII
*   tab size:   8 (not used)
*   indentation:4
*
*   created on: 2002mar07
*   created by: Markus W. Scherer
*
*   C version of UnicodeSet.
*/


/**
 * \file
 * \brief C API: Unicode Set
 *
 * <p>This is a C wrapper around the C++ UnicodeSet class.</p>
 */

#ifndef __USET_H__
#define __USET_H__

#include "unicode/utypes.h"
#include "unicode/uchar.h"

#ifndef UCNV_H
struct USet;
/**
 * A UnicodeSet.  Use the uset_* API to manipulate.  Create with
 * uset_open*, and destroy with uset_close.
 * @stable ICU 2.4
 */
typedef struct USet USet;
#endif

/**
 * Bitmask values to be passed to uset_openPatternOptions() or
 * uset_applyPattern() taking an option parameter.
 * @stable ICU 2.4
 */
enum {
    /**
     * Ignore white space within patterns unless quoted or escaped.
     * @stable ICU 2.4
     */
    USET_IGNORE_SPACE = 1,  

    /**
     * Enable case insensitive matching.  E.g., "[ab]" with this flag
     * will match 'a', 'A', 'b', and 'B'.  "[^ab]" with this flag will
     * match all except 'a', 'A', 'b', and 'B'. This performs a full
     * closure over case mappings, e.g. U+017F for s.
     * @stable ICU 2.4
     */
    USET_CASE_INSENSITIVE = 2,  

    /**
     * Bitmask for UnicodeSet::closeOver() indicating letter case.
     * This may be ORed together with other selectors.
     * @internal
     */
    USET_CASE = 2,

    /**
     * Enable case insensitive matching.  E.g., "[ab]" with this flag
     * will match 'a', 'A', 'b', and 'B'.  "[^ab]" with this flag will
     * match all except 'a', 'A', 'b', and 'B'. This adds the lower-,
     * title-, and uppercase mappings as well as the case folding
     * of each existing element in the set.
     * @draft ICU 3.2
     */
    USET_ADD_CASE_MAPPINGS = 4,

    /**
     * Enough for any single-code point set
     * @internal
     */
    USET_SERIALIZED_STATIC_ARRAY_CAPACITY=8
};

/**
 * A serialized form of a Unicode set.  Limited manipulations are
 * possible directly on a serialized set.  See below.
 * @stable ICU 2.4
 */
typedef struct USerializedSet {
    /**
     * The serialized Unicode Set.
     * @stable ICU 2.4
     */
    const uint16_t *array;
    /**
     * The length of the array that contains BMP characters.
     * @stable ICU 2.4
     */
    int32_t bmpLength;
    /**
     * The total length of the array.
     * @stable ICU 2.4
     */
    int32_t length;
    /**
     * A small buffer for the array to reduce memory allocations.
     * @stable ICU 2.4
     */
    uint16_t staticArray[USET_SERIALIZED_STATIC_ARRAY_CAPACITY];
} USerializedSet;

/*********************************************************************
 * USet API
 *********************************************************************/

/**
 * Creates a USet object that contains the range of characters
 * start..end, inclusive.
 * @param start first character of the range, inclusive
 * @param end last character of the range, inclusive
 * @return a newly created USet.  The caller must call uset_close() on
 * it when done.
 * @stable ICU 2.4
 */
U_STABLE USet* U_EXPORT2
uset_open(UChar32 start, UChar32 end);

/**
 * Creates a set from the given pattern.  See the UnicodeSet class
 * description for the syntax of the pattern language.
 * @param pattern a string specifying what characters are in the set
 * @param patternLength the length of the pattern, or -1 if null
 * terminated
 * @param ec the error code
 * @stable ICU 2.4
 */
U_STABLE USet* U_EXPORT2
uset_openPattern(const UChar* pattern, int32_t patternLength,
                 UErrorCode* ec);

/**
 * Creates a set from the given pattern.  See the UnicodeSet class
 * description for the syntax of the pattern language.
 * @param pattern a string specifying what characters are in the set
 * @param patternLength the length of the pattern, or -1 if null
 * terminated
 * @param options bitmask for options to apply to the pattern.
 * Valid options are USET_IGNORE_SPACE and USET_CASE_INSENSITIVE.
 * @param ec the error code
 * @stable ICU 2.4
 */
U_STABLE USet* U_EXPORT2
uset_openPatternOptions(const UChar* pattern, int32_t patternLength,
                 uint32_t options,
                 UErrorCode* ec);

/**
 * Disposes of the storage used by a USet object.  This function should
 * be called exactly once for objects returned by uset_open().
 * @param set the object to dispose of
 * @stable ICU 2.4
 */
U_STABLE void U_EXPORT2
uset_close(USet* set);

/**
 * Causes the USet object to represent the range <code>start - end</code>.
 * If <code>start > end</code> then this USet is set to an empty range.
 * @param set the object to set to the given range
 * @param start first character in the set, inclusive
 * @param end last character in the set, inclusive
 * @draft ICU 3.2
 */
U_DRAFT void U_EXPORT2
uset_set(USet* set,
         UChar32 start, UChar32 end);

/**
 * Modifies the set to represent the set specified by the given
 * pattern. See the UnicodeSet class description for the syntax of 
 * the pattern language. See also the User Guide chapter about UnicodeSet.
 * <em>Empties the set passed before applying the pattern.</em>
 * @param set               The set to which the pattern is to be applied. 
 * @param pattern           A pointer to UChar string specifying what characters are in the set.
 *                          The character at pattern[0] must be a '['.
 * @param patternLength     The length of the UChar string. -1 if NUL terminated.
 * @param options           A bitmask for options to apply to the pattern.
 *                          Valid options are USET_IGNORE_SPACE and USET_CASE_INSENSITIVE.
 * @param status            Returns an error if the pattern cannot be parsed.
 * @return                  Upon successful parse, the value is either
 *                          the index of the character after the closing ']' 
 *                          of the parsed pattern.
 *                          If the status code indicates failure, then the return value 
 *                          is the index of the error in the source.
 *                                  
 * @draft ICU 2.8
 */
U_DRAFT int32_t U_EXPORT2 
uset_applyPattern(USet *set,
                  const UChar *pattern, int32_t patternLength,
                  uint32_t options,
                  UErrorCode *status);

/**
 * Modifies the set to contain those code points which have the given value
 * for the given binary or enumerated property, as returned by
 * u_getIntPropertyValue.  Prior contents of this set are lost.
 *
 * @param set the object to contain the code points defined by the property
 *
 * @param prop a property in the range UCHAR_BIN_START..UCHAR_BIN_LIMIT-1
 * or UCHAR_INT_START..UCHAR_INT_LIMIT-1
 * or UCHAR_MASK_START..UCHAR_MASK_LIMIT-1.
 *
 * @param value a value in the range u_getIntPropertyMinValue(prop)..
 * u_getIntPropertyMaxValue(prop), with one exception.  If prop is
 * UCHAR_GENERAL_CATEGORY_MASK, then value should not be a UCharCategory, but
 * rather a mask value produced by U_GET_GC_MASK().  This allows grouped
 * categories such as [:L:] to be represented.
 *
 * @param ec error code input/output parameter
 *
 * @draft ICU 3.2
 */
U_DRAFT void U_EXPORT2
uset_applyIntPropertyValue(USet* set,
                           UProperty prop, int32_t value, UErrorCode* ec);

/**
 * Modifies the set to contain those code points which have the
 * given value for the given property.  Prior contents of this
 * set are lost.
 *
 * @param set the object to contain the code points defined by the given
 * property and value alias
 *
 * @param prop a string specifying a property alias, either short or long.
 * The name is matched loosely.  See PropertyAliases.txt for names and a
 * description of loose matching.  If the value string is empty, then this
 * string is interpreted as either a General_Category value alias, a Script
 * value alias, a binary property alias, or a special ID.  Special IDs are
 * matched loosely and correspond to the following sets:
 *
 * "ANY" = [\\u0000-\\U0010FFFF],
 * "ASCII" = [\\u0000-\\u007F].
 *
 * @param propLength the length of the prop, or -1 if NULL
 *
 * @param value a string specifying a value alias, either short or long.
 * The name is matched loosely.  See PropertyValueAliases.txt for names
 * and a description of loose matching.  In addition to aliases listed,
 * numeric values and canonical combining classes may be expressed
 * numerically, e.g., ("nv", "0.5") or ("ccc", "220").  The value string
 * may also be empty.
 *
 * @param valueLength the length of the value, or -1 if NULL
 *
 * @param ec error code input/output parameter
 *
 * @draft ICU 3.2
 */
U_DRAFT void U_EXPORT2
uset_applyPropertyAlias(USet* set,
                        const UChar *prop, int32_t propLength,
                        const UChar *value, int32_t valueLength,
                        UErrorCode* ec);

/**
 * Return true if the given position, in the given pattern, appears
 * to be the start of a UnicodeSet pattern.
 *
 * @param pattern a string specifying the pattern
 * @param patternLength the length of the pattern, or -1 if NULL
 * @param pos the given position
 * @draft ICU 3.2
 */
U_DRAFT UBool U_EXPORT2
uset_resemblesPattern(const UChar *pattern, int32_t patternLength,
                      int32_t pos);

/**
 * Returns a string representation of this set.  If the result of
 * calling this function is passed to a uset_openPattern(), it
 * will produce another set that is equal to this one.
 * @param set the set
 * @param result the string to receive the rules, may be NULL
 * @param resultCapacity the capacity of result, may be 0 if result is NULL
 * @param escapeUnprintable if TRUE then convert unprintable
 * character to their hex escape representations, \\uxxxx or
 * \\Uxxxxxxxx.  Unprintable characters are those other than
 * U+000A, U+0020..U+007E.
 * @param ec error code.
 * @return length of string, possibly larger than resultCapacity
 * @stable ICU 2.4
 */
U_STABLE int32_t U_EXPORT2
uset_toPattern(const USet* set,
               UChar* result, int32_t resultCapacity,
               UBool escapeUnprintable,
               UErrorCode* ec);

/**
 * Adds the given character to the given USet.  After this call,
 * uset_contains(set, c) will return TRUE.
 * @param set the object to which to add the character
 * @param c the character to add
 * @stable ICU 2.4
 */
U_STABLE void U_EXPORT2
uset_add(USet* set, UChar32 c);

/**
 * Adds all of the elements in the specified set to this set if
 * they're not already present.  This operation effectively
 * modifies this set so that its value is the <i>union</i> of the two
 * sets.  The behavior of this operation is unspecified if the specified
 * collection is modified while the operation is in progress.
 *
 * @param set the object to which to add the set
 * @param additionalSet the source set whose elements are to be added to this set.
 * @stable ICU 2.6
 */
U_STABLE void U_EXPORT2
uset_addAll(USet* set, const USet *additionalSet);

/**
 * Adds the given range of characters to the given USet.  After this call,
 * uset_contains(set, start, end) will return TRUE.
 * @param set the object to which to add the character
 * @param start the first character of the range to add, inclusive
 * @param end the last character of the range to add, inclusive
 * @stable ICU 2.2
 */
U_STABLE void U_EXPORT2
uset_addRange(USet* set, UChar32 start, UChar32 end);

/**
 * Adds the given string to the given USet.  After this call,
 * uset_containsString(set, str, strLen) will return TRUE.
 * @param set the object to which to add the character
 * @param str the string to add
 * @param strLen the length of the string or -1 if null terminated.
 * @stable ICU 2.4
 */
U_STABLE void U_EXPORT2
uset_addString(USet* set, const UChar* str, int32_t strLen);

/**
 * Removes the given character from the given USet.  After this call,
 * uset_contains(set, c) will return FALSE.
 * @param set the object from which to remove the character
 * @param c the character to remove
 * @stable ICU 2.4
 */
U_STABLE void U_EXPORT2
uset_remove(USet* set, UChar32 c);

/**
 * Removes the given range of characters from the given USet.  After this call,
 * uset_contains(set, start, end) will return FALSE.
 * @param set the object to which to add the character
 * @param start the first character of the range to remove, inclusive
 * @param end the last character of the range to remove, inclusive
 * @stable ICU 2.2
 */
U_STABLE void U_EXPORT2
uset_removeRange(USet* set, UChar32 start, UChar32 end);

/**