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alphaindex.h
26.13
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appendable.h
8.25
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basictz.h
8.73
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brkiter.h
27.31
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bytestream.h
9.16
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bytestrie.h
19.19
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bytestriebuilder.h
7.06
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calendar.h
105.26
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caniter.h
7.24
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chariter.h
23.71
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choicfmt.h
23.74
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coleitr.h
13.57
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coll.h
55.46
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compactdecimalformat.h
16.56
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curramt.h
3.57
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currpinf.h
6.97
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currunit.h
2.81
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datefmt.h
40.07
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dbbi.h
1020
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dcfmtsym.h
16.46
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decimfmt.h
90.45
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docmain.h
6.28
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dtfmtsym.h
37.05
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dtintrv.h
3.65
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dtitvfmt.h
42.76
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dtitvinf.h
18.34
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dtptngen.h
23.18
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dtrule.h
8.51
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enumset.h
1.94
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errorcode.h
4.67
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fieldpos.h
8.51
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filteredbrk.h
4.22
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fmtable.h
24.29
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format.h
12.33
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fpositer.h
2.87
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gender.h
3.07
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gregocal.h
31.46
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icudataver.h
938
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icuplug.h
11.58
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idna.h
12.55
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listformatter.h
4.73
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localpointer.h
18.17
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locdspnm.h
6.92
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locid.h
31.3
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measfmt.h
10.43
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measunit.h
37.64
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measure.h
4.15
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messagepattern.h
33.53
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msgfmt.h
43.05
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normalizer2.h
28.17
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normlzr.h
30.65
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numfmt.h
45.85
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numsys.h
6.62
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parseerr.h
2.97
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parsepos.h
5.34
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platform.h
26.96
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plurfmt.h
25.55
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plurrule.h
17.16
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ptypes.h
3.36
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putil.h
6.23
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rbbi.h
29.2
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rbnf.h
46.66
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rbtz.h
15.36
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regex.h
84.75
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region.h
9
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reldatefmt.h
13.73
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rep.h
9.38
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resbund.h
17.89
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schriter.h
6.15
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scientificnumberformatter.h
6.48
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search.h
22.1
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selfmt.h
14.13
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simpleformatter.h
11.14
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simpletz.h
45.13
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smpdtfmt.h
69.24
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sortkey.h
11.01
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std_string.h
905
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strenum.h
9.92
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stringpiece.h
6.38
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stringtriebuilder.h
14.56
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stsearch.h
21.18
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symtable.h
4.1
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tblcoll.h
36.24
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timezone.h
40.71
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tmunit.h
2.94
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tmutamt.h
4.69
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tmutfmt.h
7.61
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translit.h
54.41
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tzfmt.h
42.69
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tznames.h
16.25
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tzrule.h
35.21
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tztrans.h
5.96
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ubidi.h
88.57
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ubrk.h
20.05
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ucal.h
54.18
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ucasemap.h
16.45
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ucat.h
5.25
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uchar.h
122.74
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ucharstrie.h
20.8
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ucharstriebuilder.h
7.01
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uchriter.h
12.82
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uclean.h
11.03
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ucnv.h
82.81
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ucnv_cb.h
6.48
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ucnv_err.h
20.87
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ucnvsel.h
6.03
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ucol.h
60.51
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ucoleitr.h
9.34
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uconfig.h
11.76
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ucsdet.h
14.35
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ucurr.h
14.92
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udat.h
59.91
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udata.h
15.28
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udateintervalformat.h
6.68
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udatpg.h
23.5
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udisplaycontext.h
4.87
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uenum.h
7.76
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ufieldpositer.h
4.24
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uformattable.h
10.65
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ugender.h
1.89
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uidna.h
33.26
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uiter.h
22.67
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uldnames.h
10.34
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ulistformatter.h
4.43
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uloc.h
49.78
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ulocdata.h
10.57
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umachine.h
10.94
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umisc.h
1.23
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umsg.h
24.12
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unifilt.h
3.52
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unifunct.h
3.87
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unimatch.h
5.93
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unirepl.h
3.21
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uniset.h
63.86
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unistr.h
170.03
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unorm.h
20.18
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unorm2.h
25.11
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unum.h
49.13
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unumsys.h
7.03
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uobject.h
10.61
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upluralrules.h
4.47
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uregex.h
71.95
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uregion.h
9.58
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ureldatefmt.h
11.85
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urename.h
123.32
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urep.h
5.27
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ures.h
36.25
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uscript.h
25.24
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usearch.h
37.71
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uset.h
39.67
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usetiter.h
9.38
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ushape.h
17.89
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uspoof.h
45.43
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usprep.h
8.02
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ustdio.h
38.43
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ustream.h
1.8
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ustring.h
72.69
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ustringtrie.h
3.04
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utext.h
57.97
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utf.h
7.64
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utf16.h
18.63
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utf32.h
653
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utf8.h
27.62
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utf_old.h
42.5
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utmscale.h
13.37
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utrace.h
13.09
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utrans.h
25.42
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utypes.h
31.05
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uvernum.h
5.62
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uversion.h
6.29
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2021-10-12 12:29
vtzone.h
20.06
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2021-10-12 12:29
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/* ******************************************************************************* * * Copyright (C) 2009-2016, International Business Machines * Corporation and others. All Rights Reserved. * ******************************************************************************* * file name: localpointer.h * encoding: US-ASCII * tab size: 8 (not used) * indentation:4 * * created on: 2009nov13 * created by: Markus W. Scherer */ #ifndef __LOCALPOINTER_H__ #define __LOCALPOINTER_H__ /** * \file * \brief C++ API: "Smart pointers" for use with and in ICU4C C++ code. * * These classes are inspired by * - std::auto_ptr * - boost::scoped_ptr & boost::scoped_array * - Taligent Safe Pointers (TOnlyPointerTo) * * but none of those provide for all of the goals for ICU smart pointers: * - Smart pointer owns the object and releases it when it goes out of scope. * - No transfer of ownership via copy/assignment to reduce misuse. Simpler & more robust. * - ICU-compatible: No exceptions. * - Need to be able to orphan/release the pointer and its ownership. * - Need variants for normal C++ object pointers, C++ arrays, and ICU C service objects. * * For details see http://site.icu-project.org/design/cpp/scoped_ptr */ #include "unicode/utypes.h" #if U_SHOW_CPLUSPLUS_API U_NAMESPACE_BEGIN /** * "Smart pointer" base class; do not use directly: use LocalPointer etc. * * Base class for smart pointer classes that do not throw exceptions. * * Do not use this base class directly, since it does not delete its pointer. * A subclass must implement methods that delete the pointer: * Destructor and adoptInstead(). * * There is no operator T *() provided because the programmer must decide * whether to use getAlias() (without transfer of ownership) or orphan() * (with transfer of ownership and NULLing of the pointer). * * @see LocalPointer * @see LocalArray * @see U_DEFINE_LOCAL_OPEN_POINTER * @stable ICU 4.4 */ template<typename T> class LocalPointerBase { public: /** * Constructor takes ownership. * @param p simple pointer to an object that is adopted * @stable ICU 4.4 */ explicit LocalPointerBase(T *p=NULL) : ptr(p) {} /** * Destructor deletes the object it owns. * Subclass must override: Base class does nothing. * @stable ICU 4.4 */ ~LocalPointerBase() { /* delete ptr; */ } /** * NULL check. * @return TRUE if ==NULL * @stable ICU 4.4 */ UBool isNull() const { return ptr==NULL; } /** * NULL check. * @return TRUE if !=NULL * @stable ICU 4.4 */ UBool isValid() const { return ptr!=NULL; } /** * Comparison with a simple pointer, so that existing code * with ==NULL need not be changed. * @param other simple pointer for comparison * @return true if this pointer value equals other * @stable ICU 4.4 */ bool operator==(const T *other) const { return ptr==other; } /** * Comparison with a simple pointer, so that existing code * with !=NULL need not be changed. * @param other simple pointer for comparison * @return true if this pointer value differs from other * @stable ICU 4.4 */ bool operator!=(const T *other) const { return ptr!=other; } /** * Access without ownership change. * @return the pointer value * @stable ICU 4.4 */ T *getAlias() const { return ptr; } /** * Access without ownership change. * @return the pointer value as a reference * @stable ICU 4.4 */ T &operator*() const { return *ptr; } /** * Access without ownership change. * @return the pointer value * @stable ICU 4.4 */ T *operator->() const { return ptr; } /** * Gives up ownership; the internal pointer becomes NULL. * @return the pointer value; * caller becomes responsible for deleting the object * @stable ICU 4.4 */ T *orphan() { T *p=ptr; ptr=NULL; return p; } /** * Deletes the object it owns, * and adopts (takes ownership of) the one passed in. * Subclass must override: Base class does not delete the object. * @param p simple pointer to an object that is adopted * @stable ICU 4.4 */ void adoptInstead(T *p) { // delete ptr; ptr=p; } protected: /** * Actual pointer. * @internal */ T *ptr; private: // No comparison operators with other LocalPointerBases. bool operator==(const LocalPointerBase<T> &other); bool operator!=(const LocalPointerBase<T> &other); // No ownership sharing: No copy constructor, no assignment operator. LocalPointerBase(const LocalPointerBase<T> &other); void operator=(const LocalPointerBase<T> &other); // No heap allocation. Use only on the stack. static void * U_EXPORT2 operator new(size_t size); static void * U_EXPORT2 operator new[](size_t size); #if U_HAVE_PLACEMENT_NEW static void * U_EXPORT2 operator new(size_t, void *ptr); #endif }; /** * "Smart pointer" class, deletes objects via the standard C++ delete operator. * For most methods see the LocalPointerBase base class. * * Usage example: * \code * LocalPointer<UnicodeString> s(new UnicodeString((UChar32)0x50005)); * int32_t length=s->length(); // 2 * UChar lead=s->charAt(0); // 0xd900 * if(some condition) { return; } // no need to explicitly delete the pointer * s.adoptInstead(new UnicodeString((UChar)0xfffc)); * length=s->length(); // 1 * // no need to explicitly delete the pointer * \endcode * * @see LocalPointerBase * @stable ICU 4.4 */ template<typename T> class LocalPointer : public LocalPointerBase<T> { public: using LocalPointerBase<T>::operator*; using LocalPointerBase<T>::operator->; /** * Constructor takes ownership. * @param p simple pointer to an object that is adopted * @stable ICU 4.4 */ explicit LocalPointer(T *p=NULL) : LocalPointerBase<T>(p) {} /** * Constructor takes ownership and reports an error if NULL. * * This constructor is intended to be used with other-class constructors * that may report a failure UErrorCode, * so that callers need to check only for U_FAILURE(errorCode) * and not also separately for isNull(). * * @param p simple pointer to an object that is adopted * @param errorCode in/out UErrorCode, set to U_MEMORY_ALLOCATION_ERROR * if p==NULL and no other failure code had been set * @stable ICU 55 */ LocalPointer(T *p, UErrorCode &errorCode) : LocalPointerBase<T>(p) { if(p==NULL && U_SUCCESS(errorCode)) { errorCode=U_MEMORY_ALLOCATION_ERROR; } } #ifndef U_HIDE_DRAFT_API #if U_HAVE_RVALUE_REFERENCES /** * Move constructor, leaves src with isNull(). * @param src source smart pointer * @draft ICU 56 */ LocalPointer(LocalPointer<T> &&src) U_NOEXCEPT : LocalPointerBase<T>(src.ptr) { src.ptr=NULL; } #endif #endif /* U_HIDE_DRAFT_API */ /** * Destructor deletes the object it owns. * @stable ICU 4.4 */ ~LocalPointer() { delete LocalPointerBase<T>::ptr; } #ifndef U_HIDE_DRAFT_API #if U_HAVE_RVALUE_REFERENCES /** * Move assignment operator, leaves src with isNull(). * The behavior is undefined if *this and src are the same object. * @param src source smart pointer * @return *this * @draft ICU 56 */ LocalPointer<T> &operator=(LocalPointer<T> &&src) U_NOEXCEPT { return moveFrom(src); } #endif /** * Move assignment, leaves src with isNull(). * The behavior is undefined if *this and src are the same object. * * Can be called explicitly, does not need C++11 support. * @param src source smart pointer * @return *this * @draft ICU 56 */ LocalPointer<T> &moveFrom(LocalPointer<T> &src) U_NOEXCEPT { delete LocalPointerBase<T>::ptr; LocalPointerBase<T>::ptr=src.ptr; src.ptr=NULL; return *this; } /** * Swap pointers. * @param other other smart pointer * @draft ICU 56 */ void swap(LocalPointer<T> &other) U_NOEXCEPT { T *temp=LocalPointerBase<T>::ptr; LocalPointerBase<T>::ptr=other.ptr; other.ptr=temp; } #endif /* U_HIDE_DRAFT_API */ /** * Non-member LocalPointer swap function. * @param p1 will get p2's pointer * @param p2 will get p1's pointer * @draft ICU 56 */ friend inline void swap(LocalPointer<T> &p1, LocalPointer<T> &p2) U_NOEXCEPT { p1.swap(p2); } /** * Deletes the object it owns, * and adopts (takes ownership of) the one passed in. * @param p simple pointer to an object that is adopted * @stable ICU 4.4 */ void adoptInstead(T *p) { delete LocalPointerBase<T>::ptr; LocalPointerBase<T>::ptr=p; } /** * Deletes the object it owns, * and adopts (takes ownership of) the one passed in. * * If U_FAILURE(errorCode), then the current object is retained and the new one deleted. * * If U_SUCCESS(errorCode) but the input pointer is NULL, * then U_MEMORY_ALLOCATION_ERROR is set, * the current object is deleted, and NULL is set. * * @param p simple pointer to an object that is adopted * @param errorCode in/out UErrorCode, set to U_MEMORY_ALLOCATION_ERROR * if p==NULL and no other failure code had been set * @stable ICU 55 */ void adoptInsteadAndCheckErrorCode(T *p, UErrorCode &errorCode) { if(U_SUCCESS(errorCode)) { delete LocalPointerBase<T>::ptr; LocalPointerBase<T>::ptr=p; if(p==NULL) { errorCode=U_MEMORY_ALLOCATION_ERROR; } } else { delete p; } } }; /** * "Smart pointer" class, deletes objects via the C++ array delete[] operator. * For most methods see the LocalPointerBase base class. * Adds operator[] for array item access. * * Usage example: * \code * LocalArray<UnicodeString> a(new UnicodeString[2]); * a[0].append((UChar)0x61); * if(some condition) { return; } // no need to explicitly delete the array * a.adoptInstead(new UnicodeString[4]); * a[3].append((UChar)0x62).append((UChar)0x63).reverse(); * // no need to explicitly delete the array * \endcode * * @see LocalPointerBase * @stable ICU 4.4 */ template<typename T> class LocalArray : public LocalPointerBase<T> { public: using LocalPointerBase<T>::operator*; using LocalPointerBase<T>::operator->; /** * Constructor takes ownership. * @param p simple pointer to an array of T objects that is adopted * @stable ICU 4.4 */ explicit LocalArray(T *p=NULL) : LocalPointerBase<T>(p) {} #ifndef U_HIDE_DRAFT_API /** * Constructor takes ownership and reports an error if NULL. * * This constructor is intended to be used with other-class constructors * that may report a failure UErrorCode, * so that callers need to check only for U_FAILURE(errorCode) * and not also separately for isNull(). * * @param p simple pointer to an array of T objects that is adopted * @param errorCode in/out UErrorCode, set to U_MEMORY_ALLOCATION_ERROR * if p==NULL and no other failure code had been set * @draft ICU 56 */ LocalArray(T *p, UErrorCode &errorCode) : LocalPointerBase<T>(p) { if(p==NULL && U_SUCCESS(errorCode)) { errorCode=U_MEMORY_ALLOCATION_ERROR; } } #if U_HAVE_RVALUE_REFERENCES /** * Move constructor, leaves src with isNull(). * @param src source smart pointer * @draft ICU 56 */ LocalArray(LocalArray<T> &&src) U_NOEXCEPT : LocalPointerBase<T>(src.ptr) { src.ptr=NULL; } #endif #endif /* U_HIDE_DRAFT_API */ /** * Destructor deletes the array it owns. * @stable ICU 4.4 */ ~LocalArray() { delete[] LocalPointerBase<T>::ptr; } #ifndef U_HIDE_DRAFT_API #if U_HAVE_RVALUE_REFERENCES /** * Move assignment operator, leaves src with isNull(). * The behavior is undefined if *this and src are the same object. * @param src source smart pointer * @return *this * @draft ICU 56 */ LocalArray<T> &operator=(LocalArray<T> &&src) U_NOEXCEPT { return moveFrom(src); } #endif /** * Move assignment, leaves src with isNull(). * The behavior is undefined if *this and src are the same object. * * Can be called explicitly, does not need C++11 support. * @param src source smart pointer * @return *this * @draft ICU 56 */ LocalArray<T> &moveFrom(LocalArray<T> &src) U_NOEXCEPT { delete[] LocalPointerBase<T>::ptr; LocalPointerBase<T>::ptr=src.ptr; src.ptr=NULL; return *this; } /** * Swap pointers. * @param other other smart pointer * @draft ICU 56 */ void swap(LocalArray<T> &other) U_NOEXCEPT { T *temp=LocalPointerBase<T>::ptr; LocalPointerBase<T>::ptr=other.ptr; other.ptr=temp; } #endif /* U_HIDE_DRAFT_API */ /** * Non-member LocalArray swap function. * @param p1 will get p2's pointer * @param p2 will get p1's pointer * @draft ICU 56 */ friend inline void swap(LocalArray<T> &p1, LocalArray<T> &p2) U_NOEXCEPT { p1.swap(p2); } /** * Deletes the array it owns, * and adopts (takes ownership of) the one passed in. * @param p simple pointer to an array of T objects that is adopted * @stable ICU 4.4 */ void adoptInstead(T *p) { delete[] LocalPointerBase<T>::ptr; LocalPointerBase<T>::ptr=p; } #ifndef U_HIDE_DRAFT_API /** * Deletes the array it owns, * and adopts (takes ownership of) the one passed in. * * If U_FAILURE(errorCode), then the current array is retained and the new one deleted. * * If U_SUCCESS(errorCode) but the input pointer is NULL, * then U_MEMORY_ALLOCATION_ERROR is set, * the current array is deleted, and NULL is set. * * @param p simple pointer to an array of T objects that is adopted * @param errorCode in/out UErrorCode, set to U_MEMORY_ALLOCATION_ERROR * if p==NULL and no other failure code had been set * @draft ICU 56 */ void adoptInsteadAndCheckErrorCode(T *p, UErrorCode &errorCode) { if(U_SUCCESS(errorCode)) { delete[] LocalPointerBase<T>::ptr; LocalPointerBase<T>::ptr=p; if(p==NULL) { errorCode=U_MEMORY_ALLOCATION_ERROR; } } else { delete[] p; } } #endif /* U_HIDE_DRAFT_API */ /** * Array item access (writable). * No index bounds check. * @param i array index * @return reference to the array item * @stable ICU 4.4 */ T &operator[](ptrdiff_t i) const { return LocalPointerBase<T>::ptr[i]; } }; /** * \def U_DEFINE_LOCAL_OPEN_POINTER * "Smart pointer" definition macro, deletes objects via the closeFunction. * Defines a subclass of LocalPointerBase which works just * like LocalPointer<Type> except that this subclass will use the closeFunction * rather than the C++ delete operator. * * Usage example: * \code * LocalUCaseMapPointer csm(ucasemap_open(localeID, options, &errorCode)); * utf8OutLength=ucasemap_utf8ToLower(csm.getAlias(), * utf8Out, (int32_t)sizeof(utf8Out), * utf8In, utf8InLength, &errorCode); * if(U_FAILURE(errorCode)) { return; } // no need to explicitly delete the UCaseMap * \endcode * * @see LocalPointerBase * @see LocalPointer * @stable ICU 4.4 */ #if U_HAVE_RVALUE_REFERENCES #define U_DEFINE_LOCAL_OPEN_POINTER(LocalPointerClassName, Type, closeFunction) \ class LocalPointerClassName : public LocalPointerBase<Type> { \ public: \ using LocalPointerBase<Type>::operator*; \ using LocalPointerBase<Type>::operator->; \ explicit LocalPointerClassName(Type *p=NULL) : LocalPointerBase<Type>(p) {} \ LocalPointerClassName(LocalPointerClassName &&src) U_NOEXCEPT \ : LocalPointerBase<Type>(src.ptr) { \ src.ptr=NULL; \ } \ ~LocalPointerClassName() { if (ptr != NULL) { closeFunction(ptr); } } \ LocalPointerClassName &operator=(LocalPointerClassName &&src) U_NOEXCEPT { \ return moveFrom(src); \ } \ LocalPointerClassName &moveFrom(LocalPointerClassName &src) U_NOEXCEPT { \ if (ptr != NULL) { closeFunction(ptr); } \ LocalPointerBase<Type>::ptr=src.ptr; \ src.ptr=NULL; \ return *this; \ } \ void swap(LocalPointerClassName &other) U_NOEXCEPT { \ Type *temp=LocalPointerBase<Type>::ptr; \ LocalPointerBase<Type>::ptr=other.ptr; \ other.ptr=temp; \ } \ friend inline void swap(LocalPointerClassName &p1, LocalPointerClassName &p2) U_NOEXCEPT { \ p1.swap(p2); \ } \ void adoptInstead(Type *p) { \ if (ptr != NULL) { closeFunction(ptr); } \ ptr=p; \ } \ } #else #define U_DEFINE_LOCAL_OPEN_POINTER(LocalPointerClassName, Type, closeFunction) \ class LocalPointerClassName : public LocalPointerBase<Type> { \ public: \ using LocalPointerBase<Type>::operator*; \ using LocalPointerBase<Type>::operator->; \ explicit LocalPointerClassName(Type *p=NULL) : LocalPointerBase<Type>(p) {} \ ~LocalPointerClassName() { closeFunction(ptr); } \ LocalPointerClassName &moveFrom(LocalPointerClassName &src) U_NOEXCEPT { \ if (ptr != NULL) { closeFunction(ptr); } \ LocalPointerBase<Type>::ptr=src.ptr; \ src.ptr=NULL; \ return *this; \ } \ void swap(LocalPointerClassName &other) U_NOEXCEPT { \ Type *temp=LocalPointerBase<Type>::ptr; \ LocalPointerBase<Type>::ptr=other.ptr; \ other.ptr=temp; \ } \ friend inline void swap(LocalPointerClassName &p1, LocalPointerClassName &p2) U_NOEXCEPT { \ p1.swap(p2); \ } \ void adoptInstead(Type *p) { \ if (ptr != NULL) { closeFunction(ptr); } \ ptr=p; \ } \ } #endif U_NAMESPACE_END #endif /* U_SHOW_CPLUSPLUS_API */ #endif /* __LOCALPOINTER_H__ */