Gecko [ klinikpearlcity.com ]

Name	Size	Permission	Date
alphaindex.h	26.43 KB	-rw-r--r--	2026-04-09 08:29
appendable.h	8.54 KB	-rw-r--r--	2026-04-09 08:29
basictz.h	9.99 KB	-rw-r--r--	2026-04-09 08:29
brkiter.h	28.52 KB	-rw-r--r--	2026-04-09 08:29
bytestream.h	11.79 KB	-rw-r--r--	2026-04-09 08:29
bytestrie.h	20.83 KB	-rw-r--r--	2026-04-09 08:29
bytestriebuilder.h	7.44 KB	-rw-r--r--	2026-04-09 08:29
calendar.h	110.47 KB	-rw-r--r--	2026-04-09 08:29
caniter.h	7.47 KB	-rw-r--r--	2026-04-09 08:29
casemap.h	25.42 KB	-rw-r--r--	2026-04-09 08:29
char16ptr.h	10.79 KB	-rw-r--r--	2026-04-09 08:29
chariter.h	23.79 KB	-rw-r--r--	2026-04-09 08:29
choicfmt.h	23.99 KB	-rw-r--r--	2026-04-09 08:29
coleitr.h	13.78 KB	-rw-r--r--	2026-04-09 08:29
coll.h	59.5 KB	-rw-r--r--	2026-04-09 08:29
compactdecimalformat.h	6.88 KB	-rw-r--r--	2026-04-09 08:29
curramt.h	3.67 KB	-rw-r--r--	2026-04-09 08:29
currpinf.h	7.3 KB	-rw-r--r--	2026-04-09 08:29
currunit.h	4.02 KB	-rw-r--r--	2026-04-09 08:29
datefmt.h	41.29 KB	-rw-r--r--	2026-04-09 08:29
dbbi.h	1.19 KB	-rw-r--r--	2026-04-09 08:29
dcfmtsym.h	21.27 KB	-rw-r--r--	2026-04-09 08:29
decimfmt.h	87.45 KB	-rw-r--r--	2026-04-09 08:29
displayoptions.h	7.08 KB	-rw-r--r--	2026-04-09 08:29
docmain.h	7.66 KB	-rw-r--r--	2026-04-09 08:29
dtfmtsym.h	41.04 KB	-rw-r--r--	2026-04-09 08:29
dtintrv.h	3.84 KB	-rw-r--r--	2026-04-09 08:29
dtitvfmt.h	49.2 KB	-rw-r--r--	2026-04-09 08:29
dtitvinf.h	18.54 KB	-rw-r--r--	2026-04-09 08:29
dtptngen.h	29.28 KB	-rw-r--r--	2026-04-09 08:29
dtrule.h	8.66 KB	-rw-r--r--	2026-04-09 08:29
edits.h	20.74 KB	-rw-r--r--	2026-04-09 08:29
enumset.h	2.08 KB	-rw-r--r--	2026-04-09 08:29
errorcode.h	4.84 KB	-rw-r--r--	2026-04-09 08:29
fieldpos.h	8.69 KB	-rw-r--r--	2026-04-09 08:29
filteredbrk.h	5.37 KB	-rw-r--r--	2026-04-09 08:29
fmtable.h	24.36 KB	-rw-r--r--	2026-04-09 08:29
format.h	12.78 KB	-rw-r--r--	2026-04-09 08:29
formattednumber.h	6.25 KB	-rw-r--r--	2026-04-09 08:29
formattedvalue.h	9.75 KB	-rw-r--r--	2026-04-09 08:29
fpositer.h	3.03 KB	-rw-r--r--	2026-04-09 08:29
gender.h	3.35 KB	-rw-r--r--	2026-04-09 08:29
gregocal.h	30.05 KB	-rw-r--r--	2026-04-09 08:29
icudataver.h	1.02 KB	-rw-r--r--	2026-04-09 08:29
icuplug.h	12.1 KB	-rw-r--r--	2026-04-09 08:29
idna.h	12.93 KB	-rw-r--r--	2026-04-09 08:29
listformatter.h	8.59 KB	-rw-r--r--	2026-04-09 08:29
localebuilder.h	11.09 KB	-rw-r--r--	2026-04-09 08:29
localematcher.h	26.86 KB	-rw-r--r--	2026-04-09 08:29
localpointer.h	19.52 KB	-rw-r--r--	2026-04-09 08:29
locdspnm.h	7.12 KB	-rw-r--r--	2026-04-09 08:29
locid.h	53.98 KB	-rw-r--r--	2026-04-09 08:29
measfmt.h	11.41 KB	-rw-r--r--	2026-04-09 08:29
measunit.h	133.12 KB	-rw-r--r--	2026-04-09 08:29
measure.h	4.63 KB	-rw-r--r--	2026-04-09 08:29
messageformat2.h	21.59 KB	-rw-r--r--	2026-04-09 08:29
messageformat2_arguments.h	3.84 KB	-rw-r--r--	2026-04-09 08:29
messageformat2_data_model.h	96.61 KB	-rw-r--r--	2026-04-09 08:29
messageformat2_data_model_names.h	784 B	-rw-r--r--	2026-04-09 08:29
messageformat2_formattable.h	39.37 KB	-rw-r--r--	2026-04-09 08:29
messageformat2_function_registry.h	18.07 KB	-rw-r--r--	2026-04-09 08:29
messagepattern.h	33.79 KB	-rw-r--r--	2026-04-09 08:29
msgfmt.h	44.94 KB	-rw-r--r--	2026-04-09 08:29
normalizer2.h	34.68 KB	-rw-r--r--	2026-04-09 08:29
normlzr.h	30.79 KB	-rw-r--r--	2026-04-09 08:29
nounit.h	2.24 KB	-rw-r--r--	2026-04-09 08:29
numberformatter.h	90.72 KB	-rw-r--r--	2026-04-09 08:29
numberrangeformatter.h	25.68 KB	-rw-r--r--	2026-04-09 08:29
numfmt.h	50.16 KB	-rw-r--r--	2026-04-09 08:29
numsys.h	7.22 KB	-rw-r--r--	2026-04-09 08:29
parseerr.h	3.08 KB	-rw-r--r--	2026-04-09 08:29
parsepos.h	5.56 KB	-rw-r--r--	2026-04-09 08:29
platform.h	27.19 KB	-rw-r--r--	2026-04-09 08:29
plurfmt.h	25.46 KB	-rw-r--r--	2026-04-09 08:29
plurrule.h	20.63 KB	-rw-r--r--	2026-04-09 08:29
ptypes.h	2.16 KB	-rw-r--r--	2026-04-09 08:29
putil.h	6.32 KB	-rw-r--r--	2026-04-09 08:29
rbbi.h	31.73 KB	-rw-r--r--	2026-04-09 08:29
rbnf.h	57.19 KB	-rw-r--r--	2026-04-09 08:29
rbtz.h	15.75 KB	-rw-r--r--	2026-04-09 08:29
regex.h	83.83 KB	-rw-r--r--	2026-04-09 08:29
region.h	9.2 KB	-rw-r--r--	2026-04-09 08:29
reldatefmt.h	22.69 KB	-rw-r--r--	2026-04-09 08:29
rep.h	9.38 KB	-rw-r--r--	2026-04-09 08:29
resbund.h	18.02 KB	-rw-r--r--	2026-04-09 08:29
schriter.h	6.09 KB	-rw-r--r--	2026-04-09 08:29
scientificnumberformatter.h	6.44 KB	-rw-r--r--	2026-04-09 08:29
search.h	22.21 KB	-rw-r--r--	2026-04-09 08:29
selfmt.h	14.35 KB	-rw-r--r--	2026-04-09 08:29
simpleformatter.h	12.6 KB	-rw-r--r--	2026-04-09 08:29
simplenumberformatter.h	8.87 KB	-rw-r--r--	2026-04-09 08:29
simpletz.h	45.62 KB	-rw-r--r--	2026-04-09 08:29
smpdtfmt.h	57.57 KB	-rw-r--r--	2026-04-09 08:29
sortkey.h	11.13 KB	-rw-r--r--	2026-04-09 08:29
std_string.h	1.05 KB	-rw-r--r--	2026-04-09 08:29
strenum.h	9.96 KB	-rw-r--r--	2026-04-09 08:29
stringoptions.h	5.79 KB	-rw-r--r--	2026-04-09 08:29
stringpiece.h	10.29 KB	-rw-r--r--	2026-04-09 08:29
stringtriebuilder.h	15.53 KB	-rw-r--r--	2026-04-09 08:29
stsearch.h	21.43 KB	-rw-r--r--	2026-04-09 08:29
symtable.h	4.28 KB	-rw-r--r--	2026-04-09 08:29
tblcoll.h	38.79 KB	-rw-r--r--	2026-04-09 08:29
timezone.h	45.59 KB	-rw-r--r--	2026-04-09 08:29
tmunit.h	3.37 KB	-rw-r--r--	2026-04-09 08:29
tmutamt.h	4.9 KB	-rw-r--r--	2026-04-09 08:29
tmutfmt.h	7.42 KB	-rw-r--r--	2026-04-09 08:29
translit.h	65.81 KB	-rw-r--r--	2026-04-09 08:29
tzfmt.h	44.76 KB	-rw-r--r--	2026-04-09 08:29
tznames.h	16.85 KB	-rw-r--r--	2026-04-09 08:29
tzrule.h	34.81 KB	-rw-r--r--	2026-04-09 08:29
tztrans.h	6.11 KB	-rw-r--r--	2026-04-09 08:29
ubidi.h	89.61 KB	-rw-r--r--	2026-04-09 08:29
ubiditransform.h	12.71 KB	-rw-r--r--	2026-04-09 08:29
ubrk.h	24.43 KB	-rw-r--r--	2026-04-09 08:29
ucal.h	63.95 KB	-rw-r--r--	2026-04-09 08:29
ucasemap.h	15.27 KB	-rw-r--r--	2026-04-09 08:29
ucat.h	5.35 KB	-rw-r--r--	2026-04-09 08:29
uchar.h	152.33 KB	-rw-r--r--	2026-04-09 08:29
ucharstrie.h	22.59 KB	-rw-r--r--	2026-04-09 08:29
ucharstriebuilder.h	7.48 KB	-rw-r--r--	2026-04-09 08:29
uchriter.h	13.24 KB	-rw-r--r--	2026-04-09 08:29
uclean.h	11.21 KB	-rw-r--r--	2026-04-09 08:29
ucnv.h	83.34 KB	-rw-r--r--	2026-04-09 08:29
ucnv_cb.h	6.58 KB	-rw-r--r--	2026-04-09 08:29
ucnv_err.h	20.98 KB	-rw-r--r--	2026-04-09 08:29
ucnvsel.h	6.24 KB	-rw-r--r--	2026-04-09 08:29
ucol.h	67.35 KB	-rw-r--r--	2026-04-09 08:29
ucoleitr.h	9.82 KB	-rw-r--r--	2026-04-09 08:29
uconfig.h	12.56 KB	-rw-r--r--	2026-04-09 08:29
ucpmap.h	5.54 KB	-rw-r--r--	2026-04-09 08:29
ucptrie.h	22.51 KB	-rw-r--r--	2026-04-09 08:29
ucsdet.h	14.69 KB	-rw-r--r--	2026-04-09 08:29
ucurr.h	16.72 KB	-rw-r--r--	2026-04-09 08:29
udat.h	62.66 KB	-rw-r--r--	2026-04-09 08:29
udata.h	15.63 KB	-rw-r--r--	2026-04-09 08:29
udateintervalformat.h	11.93 KB	-rw-r--r--	2026-04-09 08:29
udatpg.h	30.13 KB	-rw-r--r--	2026-04-09 08:29
udisplaycontext.h	5.94 KB	-rw-r--r--	2026-04-09 08:29
udisplayoptions.h	8.86 KB	-rw-r--r--	2026-04-09 08:29
uenum.h	7.79 KB	-rw-r--r--	2026-04-09 08:29
ufieldpositer.h	4.41 KB	-rw-r--r--	2026-04-09 08:29
uformattable.h	10.97 KB	-rw-r--r--	2026-04-09 08:29
uformattednumber.h	8.09 KB	-rw-r--r--	2026-04-09 08:29
uformattedvalue.h	12.25 KB	-rw-r--r--	2026-04-09 08:29
ugender.h	2.06 KB	-rw-r--r--	2026-04-09 08:29
uidna.h	34.12 KB	-rw-r--r--	2026-04-09 08:29
uiter.h	22.75 KB	-rw-r--r--	2026-04-09 08:29
uldnames.h	10.48 KB	-rw-r--r--	2026-04-09 08:29
ulistformatter.h	10.78 KB	-rw-r--r--	2026-04-09 08:29
uloc.h	55.38 KB	-rw-r--r--	2026-04-09 08:29
ulocale.h	6.31 KB	-rw-r--r--	2026-04-09 08:29
ulocbuilder.h	16.69 KB	-rw-r--r--	2026-04-09 08:29
ulocdata.h	11.3 KB	-rw-r--r--	2026-04-09 08:29
umachine.h	15.25 KB	-rw-r--r--	2026-04-09 08:29
umisc.h	1.34 KB	-rw-r--r--	2026-04-09 08:29
umsg.h	24.25 KB	-rw-r--r--	2026-04-09 08:29
umutablecptrie.h	8.3 KB	-rw-r--r--	2026-04-09 08:29
unifilt.h	4 KB	-rw-r--r--	2026-04-09 08:29
unifunct.h	4.05 KB	-rw-r--r--	2026-04-09 08:29
unimatch.h	6.1 KB	-rw-r--r--	2026-04-09 08:29
unirepl.h	3.38 KB	-rw-r--r--	2026-04-09 08:29
uniset.h	70.18 KB	-rw-r--r--	2026-04-09 08:29
unistr.h	184.51 KB	-rw-r--r--	2026-04-09 08:29
unorm.h	20.55 KB	-rw-r--r--	2026-04-09 08:29
unorm2.h	25.66 KB	-rw-r--r--	2026-04-09 08:29
unum.h	55.16 KB	-rw-r--r--	2026-04-09 08:29
unumberformatter.h	19.68 KB	-rw-r--r--	2026-04-09 08:29
unumberoptions.h	5.23 KB	-rw-r--r--	2026-04-09 08:29
unumberrangeformatter.h	15.35 KB	-rw-r--r--	2026-04-09 08:29
unumsys.h	7.26 KB	-rw-r--r--	2026-04-09 08:29
uobject.h	10.6 KB	-rw-r--r--	2026-04-09 08:29
upluralrules.h	8.79 KB	-rw-r--r--	2026-04-09 08:29
uregex.h	71.99 KB	-rw-r--r--	2026-04-09 08:29
uregion.h	9.81 KB	-rw-r--r--	2026-04-09 08:29
ureldatefmt.h	16.98 KB	-rw-r--r--	2026-04-09 08:29
urename.h	142.22 KB	-rw-r--r--	2026-04-09 08:29
urep.h	5.38 KB	-rw-r--r--	2026-04-09 08:29
ures.h	36.65 KB	-rw-r--r--	2026-04-09 08:29
uscript.h	28.95 KB	-rw-r--r--	2026-04-09 08:29
usearch.h	39.21 KB	-rw-r--r--	2026-04-09 08:29
uset.h	63.03 KB	-rw-r--r--	2026-04-09 08:29
usetiter.h	9.63 KB	-rw-r--r--	2026-04-09 08:29
ushape.h	18 KB	-rw-r--r--	2026-04-09 08:29
usimplenumberformatter.h	7.31 KB	-rw-r--r--	2026-04-09 08:29
uspoof.h	80 KB	-rw-r--r--	2026-04-09 08:29
usprep.h	8.19 KB	-rw-r--r--	2026-04-09 08:29
ustdio.h	38.58 KB	-rw-r--r--	2026-04-09 08:29
ustream.h	1.89 KB	-rw-r--r--	2026-04-09 08:29
ustring.h	72.16 KB	-rw-r--r--	2026-04-09 08:29
ustringtrie.h	3.15 KB	-rw-r--r--	2026-04-09 08:29
utext.h	58.1 KB	-rw-r--r--	2026-04-09 08:29
utf.h	8.65 KB	-rw-r--r--	2026-04-09 08:29
utf16.h	23.35 KB	-rw-r--r--	2026-04-09 08:29
utf32.h	763 B	-rw-r--r--	2026-04-09 08:29
utf8.h	31.65 KB	-rw-r--r--	2026-04-09 08:29
utf_old.h	45.85 KB	-rw-r--r--	2026-04-09 08:29
utfiterator.h	95.02 KB	-rw-r--r--	2026-04-09 08:29
utfstring.h	4.89 KB	-rw-r--r--	2026-04-09 08:29
utmscale.h	13.78 KB	-rw-r--r--	2026-04-09 08:29
utrace.h	17.18 KB	-rw-r--r--	2026-04-09 08:29
utrans.h	25.54 KB	-rw-r--r--	2026-04-09 08:29
utypes.h	36.73 KB	-rw-r--r--	2026-04-09 08:29
uvernum.h	6.33 KB	-rw-r--r--	2026-04-09 08:29
uversion.h	8.21 KB	-rw-r--r--	2026-04-09 08:29
vtzone.h	20.68 KB	-rw-r--r--	2026-04-09 08:29

Rename

// © 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"

#if U_SHOW_CPLUSPLUS_API

#include <cstddef>
#include <string_view>
#include <type_traits>

#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_(nullptr), 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);
#if defined(__cpp_char8_t) || defined(U_IN_DOXYGEN)
  /**
   * Constructs from a NUL-terminated const char8_t * pointer.
   * @param str a NUL-terminated const char8_t * pointer
   * @stable ICU 67
   */
  StringPiece(const char8_t* str) : StringPiece(reinterpret_cast<const char*>(str)) {}
#endif
  /**
   * Constructs an empty StringPiece.
   * Needed for type disambiguation from multiple other overloads.
   * @param p nullptr
   * @stable ICU 67
   */
  StringPiece(std::nullptr_t p) : ptr_(p), length_(0) {}

/**
   * Constructs from a std::string.
   * @stable ICU 4.2
   */
  StringPiece(const std::string& str)
    : ptr_(str.data()), length_(static_cast<int32_t>(str.size())) { }
#if defined(__cpp_lib_char8_t) || defined(U_IN_DOXYGEN)
  /**
   * Constructs from a std::u8string.
   * @stable ICU 67
   */
  StringPiece(const std::u8string& str)
    : ptr_(reinterpret_cast<const char*>(str.data())),
      length_(static_cast<int32_t>(str.size())) { }
#endif

/**
   * Constructs from some other implementation of a string piece class, from any
   * C++ record type that has these two methods:
   *
   * \code{.cpp}
   *
   *   struct OtherStringPieceClass {
   *     const char* data();  // or const char8_t*
   *     size_t size();
   *   };
   *
   * \endcode
   *
   * The other string piece class will typically be std::string_view from C++17
   * or absl::string_view from Abseil.
   *
   * Starting with C++20, data() may also return a const char8_t* pointer,
   * as from std::u8string_view.
   *
   * @param str the other string piece
   * @stable ICU 65
   */
  template <typename T,
            typename = std::enable_if_t<
                (std::is_same_v<decltype(T().data()), const char*>
#if defined(__cpp_char8_t)
                    || std::is_same_v<decltype(T().data()), const char8_t*>
#endif
                ) &&
                std::is_same_v<decltype(T().size()), size_t>>>
  StringPiece(T str)
      : ptr_(reinterpret_cast<const char*>(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) { }
#if defined(__cpp_char8_t) || defined(U_IN_DOXYGEN)
  /**
   * Constructs from a const char8_t * pointer and a specified length.
   * @param str a const char8_t * pointer (need not be terminated)
   * @param len the length of the string; must be non-negative
   * @stable ICU 67
   */
  StringPiece(const char8_t* str, int32_t len) :
      StringPiece(reinterpret_cast<const char*>(str), len) {}
#endif

/**
   * 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);

#ifndef U_HIDE_INTERNAL_API
  /**
   * Converts to a std::string_view().
   * @internal
   */
  inline operator std::string_view() const {
    return {data(), static_cast<std::string_view::size_type>(size())};
  }
#endif  // U_HIDE_INTERNAL_API

/**
   * Returns the string pointer. May be nullptr 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_ = nullptr; 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);

#if defined(__cpp_char8_t) || defined(U_IN_DOXYGEN)
  /**
   * Resets 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 67
   */
  inline void set(const char8_t* xdata, int32_t len) {
      set(reinterpret_cast<const char*>(xdata), len);
  }

/**
   * Resets the stringpiece to refer to new data.
   * @param str a pointer to a NUL-terminated string.
   * @stable ICU 67
   */
  inline void set(const char8_t* str) {
      set(reinterpret_cast<const char*>(str));
  }
#endif

/**
   * 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;
      }
    }
  }

/**
   * Searches the StringPiece for the given search string (needle);
   * @param needle The string for which to search.
   * @param offset Where to start searching within this string (haystack).
   * @return The offset of needle in haystack, or -1 if not found.
   * @stable ICU 67
   */
  int32_t find(StringPiece needle, int32_t offset);

/**
   * Compares this StringPiece with the other StringPiece, with semantics
   * similar to std::string::compare().
   * @param other The string to compare to.
   * @return below zero if this < other; above zero if this > other; 0 if this == other.
   * @stable ICU 67
   */
  int32_t compare(StringPiece other);

/**
   * 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_COMMON_API 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 bool operator!=(const StringPiece& x, const StringPiece& y) {
  return !(x == y);
}

U_NAMESPACE_END

#endif /* U_SHOW_CPLUSPLUS_API */

#endif  // __STRINGPIECE_H__