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10/28/2024 06:50:42 AM
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alphaindex.h
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appendable.h
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basictz.h
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brkiter.h
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bytestream.h
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bytestrie.h
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bytestriebuilder.h
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calendar.h
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caniter.h
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casemap.h
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char16ptr.h
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chariter.h
24 KB
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choicfmt.h
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coleitr.h
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coll.h
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compactdecimalformat.h
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curramt.h
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currpinf.h
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currunit.h
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datefmt.h
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dbbi.h
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dcfmtsym.h
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decimfmt.h
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docmain.h
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dtfmtsym.h
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dtintrv.h
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dtitvfmt.h
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dtitvinf.h
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dtptngen.h
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dtrule.h
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edits.h
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enumset.h
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errorcode.h
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fieldpos.h
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filteredbrk.h
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fmtable.h
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format.h
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fpositer.h
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gender.h
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gregocal.h
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icudataver.h
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icuplug.h
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idna.h
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listformatter.h
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localpointer.h
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locdspnm.h
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locid.h
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measfmt.h
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measunit.h
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measure.h
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messagepattern.h
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msgfmt.h
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normalizer2.h
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normlzr.h
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nounit.h
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numberformatter.h
64.98 KB
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numfmt.h
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numsys.h
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parseerr.h
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parsepos.h
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platform.h
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plurfmt.h
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plurrule.h
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ptypes.h
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putil.h
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rbbi.h
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rbnf.h
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rbtz.h
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regex.h
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region.h
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reldatefmt.h
14.3 KB
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rep.h
9.5 KB
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resbund.h
18.01 KB
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schriter.h
6.26 KB
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scientificnumberformatter.h
6.59 KB
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search.h
22.21 KB
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selfmt.h
14.24 KB
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simpleformatter.h
11.43 KB
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simpletz.h
45.24 KB
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smpdtfmt.h
70.09 KB
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sortkey.h
11.12 KB
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std_string.h
1015 bytes
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strenum.h
10.04 KB
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stringoptions.h
5.89 KB
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stringpiece.h
6.46 KB
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stringtriebuilder.h
15.2 KB
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stsearch.h
21.29 KB
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symtable.h
4.21 KB
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tblcoll.h
36.4 KB
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timezone.h
40.83 KB
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tmunit.h
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tmutamt.h
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tmutfmt.h
7.79 KB
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translit.h
54.53 KB
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tzfmt.h
42.81 KB
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tznames.h
16.79 KB
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tzrule.h
35.32 KB
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tztrans.h
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ubidi.h
89.28 KB
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ubiditransform.h
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ubrk.h
24.08 KB
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ucal.h
54.56 KB
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ucasemap.h
15.18 KB
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ucat.h
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uchar.h
131.61 KB
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ucharstrie.h
21.06 KB
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ucharstriebuilder.h
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uchriter.h
13.14 KB
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uclean.h
11.24 KB
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ucnv.h
83.06 KB
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ucnv_cb.h
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ucnv_err.h
20.98 KB
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ucnvsel.h
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ucol.h
61.36 KB
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ucoleitr.h
9.46 KB
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uconfig.h
11.91 KB
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ucsdet.h
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ucurr.h
15.15 KB
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udat.h
60.13 KB
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udata.h
15.53 KB
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udateintervalformat.h
6.79 KB
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udatpg.h
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udisplaycontext.h
5.89 KB
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uenum.h
7.9 KB
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ufieldpositer.h
4.36 KB
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uformattable.h
10.94 KB
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ugender.h
2 KB
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uidna.h
33.37 KB
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uiter.h
22.77 KB
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uldnames.h
10.45 KB
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ulistformatter.h
4.54 KB
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uloc.h
50.75 KB
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ulocdata.h
11.26 KB
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umachine.h
13.1 KB
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umisc.h
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umsg.h
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unifilt.h
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unifunct.h
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unimatch.h
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unirepl.h
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uniset.h
63.98 KB
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unistr.h
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unorm.h
20.45 KB
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unorm2.h
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unum.h
52.49 KB
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unumsys.h
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uobject.h
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upluralrules.h
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uregex.h
72.05 KB
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uregion.h
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ureldatefmt.h
12.22 KB
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urename.h
124.49 KB
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urep.h
5.38 KB
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ures.h
36.52 KB
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uscript.h
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usearch.h
38.14 KB
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uset.h
39.91 KB
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usetiter.h
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ushape.h
18 KB
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uspoof.h
64.9 KB
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usprep.h
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ustdio.h
38.54 KB
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ustream.h
1.8 KB
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ustring.h
72.52 KB
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ustringtrie.h
3.15 KB
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utext.h
58.11 KB
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utf.h
7.86 KB
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utf16.h
22.49 KB
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utf32.h
763 bytes
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utf8.h
28.16 KB
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utf_old.h
43.78 KB
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utmscale.h
13.78 KB
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utrace.h
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utrans.h
25.53 KB
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utypes.h
29.92 KB
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uvernum.h
5.69 KB
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uversion.h
6.4 KB
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vtzone.h
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Editing: stringpiece.h
Close
// © 2016 and later: Unicode, Inc. and others. // License & terms of use: http://www.unicode.org/copyright.html // Copyright (C) 2009-2013, International Business Machines // Corporation and others. All Rights Reserved. // // Copyright 2001 and onwards Google Inc. // Author: Sanjay Ghemawat // This code is a contribution of Google code, and the style used here is // a compromise between the original Google code and the ICU coding guidelines. // For example, data types are ICU-ified (size_t,int->int32_t), // and API comments doxygen-ified, but function names and behavior are // as in the original, if possible. // Assertion-style error handling, not available in ICU, was changed to // parameter "pinning" similar to UnicodeString. // // In addition, this is only a partial port of the original Google code, // limited to what was needed so far. The (nearly) complete original code // is in the ICU svn repository at icuhtml/trunk/design/strings/contrib // (see ICU ticket 6765, r25517). #ifndef __STRINGPIECE_H__ #define __STRINGPIECE_H__ /** * \file * \brief C++ API: StringPiece: Read-only byte string wrapper class. */ #include "unicode/utypes.h" #include "unicode/uobject.h" #include "unicode/std_string.h" // Arghh! I wish C++ literals were "string". U_NAMESPACE_BEGIN /** * A string-like object that points to a sized piece of memory. * * We provide non-explicit singleton constructors so users can pass * in a "const char*" or a "string" wherever a "StringPiece" is * expected. * * Functions or methods may use StringPiece parameters to accept either a * "const char*" or a "string" value that will be implicitly converted to a * StringPiece. * * Systematic usage of StringPiece is encouraged as it will reduce unnecessary * conversions from "const char*" to "string" and back again. * * @stable ICU 4.2 */ class U_COMMON_API StringPiece : public UMemory { private: const char* ptr_; int32_t length_; public: /** * Default constructor, creates an empty StringPiece. * @stable ICU 4.2 */ StringPiece() : ptr_(NULL), length_(0) { } /** * Constructs from a NUL-terminated const char * pointer. * @param str a NUL-terminated const char * pointer * @stable ICU 4.2 */ StringPiece(const char* str); /** * Constructs from a std::string. * @stable ICU 4.2 */ StringPiece(const std::string& str) : ptr_(str.data()), length_(static_cast<int32_t>(str.size())) { } /** * Constructs from a const char * pointer and a specified length. * @param offset a const char * pointer (need not be terminated) * @param len the length of the string; must be non-negative * @stable ICU 4.2 */ StringPiece(const char* offset, int32_t len) : ptr_(offset), length_(len) { } /** * Substring of another StringPiece. * @param x the other StringPiece * @param pos start position in x; must be non-negative and <= x.length(). * @stable ICU 4.2 */ StringPiece(const StringPiece& x, int32_t pos); /** * Substring of another StringPiece. * @param x the other StringPiece * @param pos start position in x; must be non-negative and <= x.length(). * @param len length of the substring; * must be non-negative and will be pinned to at most x.length() - pos. * @stable ICU 4.2 */ StringPiece(const StringPiece& x, int32_t pos, int32_t len); /** * Returns the string pointer. May be NULL if it is empty. * * data() may return a pointer to a buffer with embedded NULs, and the * returned buffer may or may not be null terminated. Therefore it is * typically a mistake to pass data() to a routine that expects a NUL * terminated string. * @return the string pointer * @stable ICU 4.2 */ const char* data() const { return ptr_; } /** * Returns the string length. Same as length(). * @return the string length * @stable ICU 4.2 */ int32_t size() const { return length_; } /** * Returns the string length. Same as size(). * @return the string length * @stable ICU 4.2 */ int32_t length() const { return length_; } /** * Returns whether the string is empty. * @return TRUE if the string is empty * @stable ICU 4.2 */ UBool empty() const { return length_ == 0; } /** * Sets to an empty string. * @stable ICU 4.2 */ void clear() { ptr_ = NULL; length_ = 0; } /** * Reset the stringpiece to refer to new data. * @param xdata pointer the new string data. Need not be nul terminated. * @param len the length of the new data * @stable ICU 4.8 */ void set(const char* xdata, int32_t len) { ptr_ = xdata; length_ = len; } /** * Reset the stringpiece to refer to new data. * @param str a pointer to a NUL-terminated string. * @stable ICU 4.8 */ void set(const char* str); /** * Removes the first n string units. * @param n prefix length, must be non-negative and <=length() * @stable ICU 4.2 */ void remove_prefix(int32_t n) { if (n >= 0) { if (n > length_) { n = length_; } ptr_ += n; length_ -= n; } } /** * Removes the last n string units. * @param n suffix length, must be non-negative and <=length() * @stable ICU 4.2 */ void remove_suffix(int32_t n) { if (n >= 0) { if (n <= length_) { length_ -= n; } else { length_ = 0; } } } /** * Maximum integer, used as a default value for substring methods. * @stable ICU 4.2 */ static const int32_t npos; // = 0x7fffffff; /** * Returns a substring of this StringPiece. * @param pos start position; must be non-negative and <= length(). * @param len length of the substring; * must be non-negative and will be pinned to at most length() - pos. * @return the substring StringPiece * @stable ICU 4.2 */ StringPiece substr(int32_t pos, int32_t len = npos) const { return StringPiece(*this, pos, len); } }; /** * Global operator == for StringPiece * @param x The first StringPiece to compare. * @param y The second StringPiece to compare. * @return TRUE if the string data is equal * @stable ICU 4.8 */ U_EXPORT UBool U_EXPORT2 operator==(const StringPiece& x, const StringPiece& y); /** * Global operator != for StringPiece * @param x The first StringPiece to compare. * @param y The second StringPiece to compare. * @return TRUE if the string data is not equal * @stable ICU 4.8 */ inline UBool operator!=(const StringPiece& x, const StringPiece& y) { return !(x == y); } U_NAMESPACE_END #endif // __STRINGPIECE_H__