508 lines
16 KiB
C
508 lines
16 KiB
C
/*
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*******************************************************************************
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*
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* Copyright (C) 2002-2003, International Business Machines
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* Corporation and others. All Rights Reserved.
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*
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*******************************************************************************
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* file name: uset.h
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* encoding: US-ASCII
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* tab size: 8 (not used)
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* indentation:4
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*
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* created on: 2002mar07
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* created by: Markus W. Scherer
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*
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* C version of UnicodeSet.
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*/
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/**
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* \file
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* \brief C API: Unicode Set
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*
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* <p>This is a C wrapper around the C++ UnicodeSet class.</p>
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*/
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#ifndef __USET_H__
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#define __USET_H__
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#include "unicode/utypes.h"
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#ifndef UCNV_H
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struct USet;
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/**
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* A UnicodeSet. Use the uset_* API to manipulate. Create with
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* uset_open*, and destroy with uset_close.
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* @stable ICU 2.4
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*/
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typedef struct USet USet;
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#endif
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/**
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* Bitmask values to be passed to uset_openPatternOptions() or
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* uset_applyPattern() taking an option parameter.
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* @stable ICU 2.4
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*/
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enum {
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/**
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* Ignore white space within patterns unless quoted or escaped.
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* @stable ICU 2.4
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*/
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USET_IGNORE_SPACE = 1,
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/**
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* Enable case insensitive matching. E.g., "[ab]" with this flag
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* will match 'a', 'A', 'b', and 'B'. "[^ab]" with this flag will
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* match all except 'a', 'A', 'b', and 'B'.
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* @stable ICU 2.4
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*/
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USET_CASE_INSENSITIVE = 2,
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/**
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* Bitmask for UnicodeSet::closeOver() indicating letter case.
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* This may be ORed together with other selectors.
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* @internal
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*/
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USET_CASE = 2,
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/**
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* Enough for any single-code point set
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* @internal
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*/
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USET_SERIALIZED_STATIC_ARRAY_CAPACITY=8
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};
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/**
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* A serialized form of a Unicode set. Limited manipulations are
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* possible directly on a serialized set. See below.
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* @stable ICU 2.4
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*/
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typedef struct USerializedSet {
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/**
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* The serialized Unicode Set.
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* @stable ICU 2.4
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*/
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const uint16_t *array;
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/**
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* The length of the array that contains BMP characters.
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* @stable ICU 2.4
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*/
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int32_t bmpLength;
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/**
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* The total length of the array.
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* @stable ICU 2.4
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*/
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int32_t length;
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/**
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* A small buffer for the array to reduce memory allocations.
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* @stable ICU 2.4
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*/
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uint16_t staticArray[USET_SERIALIZED_STATIC_ARRAY_CAPACITY];
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} USerializedSet;
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/*********************************************************************
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* USet API
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*********************************************************************/
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/**
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* Creates a USet object that contains the range of characters
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* start..end, inclusive.
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* @param start first character of the range, inclusive
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* @param end last character of the range, inclusive
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* @return a newly created USet. The caller must call uset_close() on
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* it when done.
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* @stable ICU 2.4
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*/
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U_STABLE USet* U_EXPORT2
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uset_open(UChar32 start, UChar32 end);
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/**
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* Creates a set from the given pattern. See the UnicodeSet class
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* description for the syntax of the pattern language.
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* @param pattern a string specifying what characters are in the set
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* @param patternLength the length of the pattern, or -1 if null
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* terminated
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* @param ec the error code
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* @stable ICU 2.4
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*/
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U_STABLE USet* U_EXPORT2
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uset_openPattern(const UChar* pattern, int32_t patternLength,
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UErrorCode* ec);
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/**
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* Creates a set from the given pattern. See the UnicodeSet class
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* description for the syntax of the pattern language.
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* @param pattern a string specifying what characters are in the set
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* @param patternLength the length of the pattern, or -1 if null
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* terminated
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* @param options bitmask for options to apply to the pattern.
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* Valid options are USET_IGNORE_SPACE and USET_CASE_INSENSITIVE.
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* @param ec the error code
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* @stable ICU 2.4
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*/
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U_STABLE USet* U_EXPORT2
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uset_openPatternOptions(const UChar* pattern, int32_t patternLength,
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uint32_t options,
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UErrorCode* ec);
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/**
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* Disposes of the storage used by a USet object. This function should
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* be called exactly once for objects returned by uset_open().
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* @param set the object to dispose of
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* @stable ICU 2.4
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*/
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U_STABLE void U_EXPORT2
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uset_close(USet* set);
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/**
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* Modifies the set to represent the set specified by the given
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* pattern. See the UnicodeSet class description for the syntax of
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* the pattern language. See also the User Guide chapter about UnicodeSet.
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* <em>Empties the set passed before applying the pattern.</em>
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* @param set The set to which the pattern is to be applied.
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* @param pattern A pointer to UChar string specifying what characters are in the set.
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* The character at pattern[0] must be a '['.
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* @param patternLength The length of the UChar string. -1 if NUL terminated.
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* @param options A bitmask for options to apply to the pattern.
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* Valid options are USET_IGNORE_SPACE and USET_CASE_INSENSITIVE.
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* @param status Returns an error if the pattern cannot be parsed.
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* @return Upon successful parse, the value is either
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* the index of the character after the closing ']'
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* of the parsed pattern.
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* If the status code indicates failure, then the return value
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* is the index of the error in the source.
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*
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* @draft ICU 2.8
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*/
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U_DRAFT int32_t U_EXPORT2
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uset_applyPattern(USet *set,
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const UChar *pattern, int32_t patternLength,
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uint32_t options,
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UErrorCode *status);
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/**
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* Returns a string representation of this set. If the result of
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* calling this function is passed to a uset_openPattern(), it
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* will produce another set that is equal to this one.
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* @param set the set
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* @param result the string to receive the rules, may be NULL
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* @param resultCapacity the capacity of result, may be 0 if result is NULL
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* @param escapeUnprintable if TRUE then convert unprintable
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* character to their hex escape representations, \uxxxx or
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* \Uxxxxxxxx. Unprintable characters are those other than
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* U+000A, U+0020..U+007E.
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* @param ec error code.
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* @return length of string, possibly larger than resultCapacity
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* @stable ICU 2.4
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*/
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U_STABLE int32_t U_EXPORT2
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uset_toPattern(const USet* set,
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UChar* result, int32_t resultCapacity,
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UBool escapeUnprintable,
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UErrorCode* ec);
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/**
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* Adds the given character to the given USet. After this call,
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* uset_contains(set, c) will return TRUE.
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* @param set the object to which to add the character
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* @param c the character to add
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* @stable ICU 2.4
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*/
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U_STABLE void U_EXPORT2
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uset_add(USet* set, UChar32 c);
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/**
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* Adds all of the elements in the specified set to this set if
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* they're not already present. This operation effectively
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* modifies this set so that its value is the <i>union</i> of the two
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* sets. The behavior of this operation is unspecified if the specified
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* collection is modified while the operation is in progress.
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*
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* @param set the object to which to add the set
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* @param additionalSet the source set whose elements are to be added to this set.
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* @draft ICU 2.6
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*/
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U_DRAFT void U_EXPORT2
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uset_addAll(USet* set, const USet *additionalSet);
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/**
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* Adds the given range of characters to the given USet. After this call,
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* uset_contains(set, start, end) will return TRUE.
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* @param set the object to which to add the character
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* @param start the first character of the range to add, inclusive
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* @param end the last character of the range to add, inclusive
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* @stable ICU 2.2
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*/
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U_STABLE void U_EXPORT2
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uset_addRange(USet* set, UChar32 start, UChar32 end);
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/**
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* Adds the given string to the given USet. After this call,
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* uset_containsString(set, str, strLen) will return TRUE.
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* @param set the object to which to add the character
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* @param str the string to add
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* @param strLen the length of the string or -1 if null terminated.
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* @stable ICU 2.4
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*/
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U_STABLE void U_EXPORT2
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uset_addString(USet* set, const UChar* str, int32_t strLen);
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/**
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* Removes the given character from the given USet. After this call,
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* uset_contains(set, c) will return FALSE.
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* @param set the object from which to remove the character
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* @param c the character to remove
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* @stable ICU 2.4
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*/
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U_STABLE void U_EXPORT2
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uset_remove(USet* set, UChar32 c);
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/**
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* Removes the given range of characters from the given USet. After this call,
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* uset_contains(set, start, end) will return FALSE.
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* @param set the object to which to add the character
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* @param start the first character of the range to remove, inclusive
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* @param end the last character of the range to remove, inclusive
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* @stable ICU 2.2
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*/
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U_STABLE void U_EXPORT2
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uset_removeRange(USet* set, UChar32 start, UChar32 end);
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/**
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* Removes the given string to the given USet. After this call,
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* uset_containsString(set, str, strLen) will return FALSE.
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* @param set the object to which to add the character
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* @param str the string to remove
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* @param strLen the length of the string or -1 if null terminated.
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* @stable ICU 2.4
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*/
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U_STABLE void U_EXPORT2
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uset_removeString(USet* set, const UChar* str, int32_t strLen);
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/**
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* Inverts this set. This operation modifies this set so that
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* its value is its complement. This operation does not affect
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* the multicharacter strings, if any.
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* @param set the set
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* @stable ICU 2.4
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*/
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U_STABLE void U_EXPORT2
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uset_complement(USet* set);
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/**
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* Removes all of the elements from this set. This set will be
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* empty after this call returns.
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* @param set the set
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* @stable ICU 2.4
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*/
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U_STABLE void U_EXPORT2
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uset_clear(USet* set);
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/**
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* Returns TRUE if the given USet contains no characters and no
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* strings.
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* @param set the set
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* @return true if set is empty
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* @stable ICU 2.4
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*/
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U_STABLE UBool U_EXPORT2
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uset_isEmpty(const USet* set);
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/**
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* Returns TRUE if the given USet contains the given character.
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* @param set the set
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* @param c The codepoint to check for within the set
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* @return true if set contains c
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* @stable ICU 2.4
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*/
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U_STABLE UBool U_EXPORT2
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uset_contains(const USet* set, UChar32 c);
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/**
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* Returns TRUE if the given USet contains all characters c
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* where start <= c && c <= end.
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* @param set the set
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* @param start the first character of the range to test, inclusive
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* @param end the last character of the range to test, inclusive
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* @return TRUE if set contains the range
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* @stable ICU 2.2
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*/
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U_STABLE UBool U_EXPORT2
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uset_containsRange(const USet* set, UChar32 start, UChar32 end);
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/**
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* Returns TRUE if the given USet contains the given string.
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* @param set the set
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* @param str the string
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* @param strLen the length of the string or -1 if null terminated.
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* @return true if set contains str
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* @stable ICU 2.4
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*/
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U_STABLE UBool U_EXPORT2
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uset_containsString(const USet* set, const UChar* str, int32_t strLen);
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/**
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* Returns the number of characters and strings contained in the given
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* USet.
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* @param set the set
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* @return a non-negative integer counting the characters and strings
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* contained in set
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* @stable ICU 2.4
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*/
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U_STABLE int32_t U_EXPORT2
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uset_size(const USet* set);
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/**
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* Returns the number of items in this set. An item is either a range
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* of characters or a single multicharacter string.
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* @param set the set
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* @return a non-negative integer counting the character ranges
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* and/or strings contained in set
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* @stable ICU 2.4
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*/
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U_STABLE int32_t U_EXPORT2
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uset_getItemCount(const USet* set);
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/**
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* Returns an item of this set. An item is either a range of
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* characters or a single multicharacter string.
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* @param set the set
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* @param itemIndex a non-negative integer in the range 0..
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* uset_getItemCount(set)-1
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* @param start pointer to variable to receive first character
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* in range, inclusive
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* @param end pointer to variable to receive last character in range,
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* inclusive
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* @param str buffer to receive the string, may be NULL
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* @param strCapacity capacity of str, or 0 if str is NULL
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* @param ec error code
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* @return the length of the string (>= 2), or 0 if the item is a
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* range, in which case it is the range *start..*end, or -1 if
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* itemIndex is out of range
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* @stable ICU 2.4
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*/
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U_STABLE int32_t U_EXPORT2
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uset_getItem(const USet* set, int32_t itemIndex,
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UChar32* start, UChar32* end,
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UChar* str, int32_t strCapacity,
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UErrorCode* ec);
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/*********************************************************************
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* Serialized set API
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*********************************************************************/
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/**
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* Serializes this set into an array of 16-bit integers. Serialization
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* (currently) only records the characters in the set; multicharacter
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* strings are ignored.
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*
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* The array
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* has following format (each line is one 16-bit integer):
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*
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* length = (n+2*m) | (m!=0?0x8000:0)
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* bmpLength = n; present if m!=0
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* bmp[0]
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* bmp[1]
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* ...
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* bmp[n-1]
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* supp-high[0]
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* supp-low[0]
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* supp-high[1]
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* supp-low[1]
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* ...
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* supp-high[m-1]
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* supp-low[m-1]
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*
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* The array starts with a header. After the header are n bmp
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* code points, then m supplementary code points. Either n or m
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* or both may be zero. n+2*m is always <= 0x7FFF.
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*
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* If there are no supplementary characters (if m==0) then the
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* header is one 16-bit integer, 'length', with value n.
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*
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* If there are supplementary characters (if m!=0) then the header
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* is two 16-bit integers. The first, 'length', has value
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* (n+2*m)|0x8000. The second, 'bmpLength', has value n.
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*
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* After the header the code points are stored in ascending order.
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* Supplementary code points are stored as most significant 16
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* bits followed by least significant 16 bits.
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*
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* @param set the set
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* @param dest pointer to buffer of destCapacity 16-bit integers.
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* May be NULL only if destCapacity is zero.
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* @param destCapacity size of dest, or zero. Must not be negative.
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* @param pErrorCode pointer to the error code. Will be set to
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* U_INDEX_OUTOFBOUNDS_ERROR if n+2*m > 0x7FFF. Will be set to
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* U_BUFFER_OVERFLOW_ERROR if n+2*m+(m!=0?2:1) > destCapacity.
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* @return the total length of the serialized format, including
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* the header, that is, n+2*m+(m!=0?2:1), or 0 on error other
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* than U_BUFFER_OVERFLOW_ERROR.
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* @stable ICU 2.4
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*/
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U_STABLE int32_t U_EXPORT2
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uset_serialize(const USet* set, uint16_t* dest, int32_t destCapacity, UErrorCode* pErrorCode);
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/**
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* Given a serialized array, fill in the given serialized set object.
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* @param fillSet pointer to result
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* @param src pointer to start of array
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* @param srcLength length of array
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* @return true if the given array is valid, otherwise false
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* @stable ICU 2.4
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*/
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U_STABLE UBool U_EXPORT2
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uset_getSerializedSet(USerializedSet* fillSet, const uint16_t* src, int32_t srcLength);
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/**
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* Set the USerializedSet to contain the given character (and nothing
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* else).
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* @param fillSet pointer to result
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* @param c The codepoint to set
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* @stable ICU 2.4
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*/
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U_STABLE void U_EXPORT2
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uset_setSerializedToOne(USerializedSet* fillSet, UChar32 c);
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/**
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* Returns TRUE if the given USerializedSet contains the given
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* character.
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* @param set the serialized set
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* @param c The codepoint to check for within the set
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* @return true if set contains c
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* @stable ICU 2.4
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*/
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U_STABLE UBool U_EXPORT2
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uset_serializedContains(const USerializedSet* set, UChar32 c);
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/**
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* Returns the number of disjoint ranges of characters contained in
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* the given serialized set. Ignores any strings contained in the
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* set.
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* @param set the serialized set
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* @return a non-negative integer counting the character ranges
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* contained in set
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* @stable ICU 2.4
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*/
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U_STABLE int32_t U_EXPORT2
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uset_getSerializedRangeCount(const USerializedSet* set);
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/**
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* Returns a range of characters contained in the given serialized
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* set.
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* @param set the serialized set
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* @param rangeIndex a non-negative integer in the range 0..
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* uset_getSerializedRangeCount(set)-1
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* @param pStart pointer to variable to receive first character
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* in range, inclusive
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* @param pEnd pointer to variable to receive last character in range,
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* inclusive
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* @return true if rangeIndex is valid, otherwise false
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* @stable ICU 2.4
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*/
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U_STABLE UBool U_EXPORT2
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uset_getSerializedRange(const USerializedSet* set, int32_t rangeIndex,
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UChar32* pStart, UChar32* pEnd);
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#endif
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