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basictz.h
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bms.h
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bmsearch.h
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calendar.h
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chariter.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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errorcode.h
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fieldpos.h
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fmtable.h
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format.h
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gregocal.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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msgfmt.h
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normlzr.h
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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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ppalmos.h
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putil.h
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pwin32.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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rep.h
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resbund.h
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schriter.h
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search.h
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simpletz.h
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smpdtfmt.h
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sortkey.h
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std_string.h
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strenum.h
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stringpiece.h
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stsearch.h
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symtable.h
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tblcoll.h
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timezone.h
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tmunit.h
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tmutamt.h
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tmutfmt.h
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translit.h
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tzrule.h
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tztrans.h
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ubidi.h
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ubrk.h
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ucal.h
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ucasemap.h
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ucat.h
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uchar.h
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uchriter.h
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uclean.h
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ucnv.h
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ucnvsel.h
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ucnv_cb.h
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ucnv_err.h
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ucol.h
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ucoleitr.h
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uconfig.h
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ucsdet.h
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ucurr.h
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udat.h
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udata.h
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udatpg.h
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udeprctd.h
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udraft.h
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uenum.h
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uidna.h
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uintrnal.h
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uiter.h
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uloc.h
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ulocdata.h
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umachine.h
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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
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unistr.h
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unorm.h
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unum.h
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uobject.h
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uobslete.h
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uregex.h
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urename.h
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urep.h
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ures.h
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uscript.h
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usearch.h
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uset.h
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usetiter.h
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ushape.h
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uspoof.h
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usprep.h
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ustdio.h
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ustream.h
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ustring.h
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usystem.h
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utext.h
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utf.h
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utf8.h
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utf16.h
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utf32.h
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utf_old.h
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utmscale.h
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utrace.h
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utrans.h
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utypes.h
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uversion.h
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vtzone.h
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Edit:
/usr/include/unicode/stringpiece.h
(5484B)
// Copyright (C) 2009, 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 const 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. * * @draft ICU 4.2 */ class U_COMMON_API StringPiece : public UMemory { private: const char* ptr_; int32_t length_; public: /** * Default constructor, creates an empty StringPiece. * @draft ICU 4.2 */ StringPiece() : ptr_(NULL), length_(0) { } /** * Constructs from a NUL-terminated const char * pointer. * @param str a NUL-terminated const char * pointer * @draft ICU 4.2 */ StringPiece(const char* str); #if U_HAVE_STD_STRING /** * Constructs from a std::string. * @draft ICU 4.2 */ StringPiece(const U_STD_NSQ string& str) : ptr_(str.data()), length_(static_cast<int32_t>(str.size())) { } #endif /** * 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 * @draft 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(). * @draft 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. * @draft 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 * @draft ICU 4.2 */ const char* data() const { return ptr_; } /** * Returns the string length. Same as length(). * @return the string length * @draft ICU 4.2 */ int32_t size() const { return length_; } /** * Returns the string length. Same as size(). * @return the string length * @draft ICU 4.2 */ int32_t length() const { return length_; } /** * Returns whether the string is empty. * @return TRUE if the string is empty * @draft ICU 4.2 */ UBool empty() const { return length_ == 0; } /** * Sets to an empty string. * @draft ICU 4.2 */ void clear() { ptr_ = NULL; length_ = 0; } /** * Removes the first n string units. * @param n prefix length, must be non-negative and <=length() * @draft 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() * @draft 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. * @draft 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 * @draft ICU 4.2 */ StringPiece substr(int32_t pos, int32_t len = npos) const { return StringPiece(*this, pos, len); } }; U_NAMESPACE_END #endif // __STRINGPIECE_H__
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