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?? alphaindex.h(26.48 KB)
?? appendable.h(8.49 KB)
?? basictz.h(9.15 KB)
?? brkiter.h(27.8 KB)
?? bytestream.h(9.6 KB)
?? bytestrie.h(20.77 KB)
?? bytestriebuilder.h(7.08 KB)
?? calendar.h(105.74 KB)
?? caniter.h(7.43 KB)
?? casemap.h(25.33 KB)
?? char16ptr.h(7.22 KB)
?? chariter.h(24.05 KB)
?? choicfmt.h(23.91 KB)
?? coleitr.h(13.76 KB)
?? coll.h(56.23 KB)
?? compactdecimalformat.h(6.88 KB)
?? curramt.h(3.76 KB)
?? currpinf.h(7.3 KB)
?? currunit.h(4.05 KB)
?? datefmt.h(40.67 KB)
?? dbbi.h(1.19 KB)
?? dcfmtsym.h(20.13 KB)
?? decimfmt.h(87.38 KB)
?? docmain.h(6.97 KB)
?? dtfmtsym.h(37.7 KB)
?? dtintrv.h(3.84 KB)
?? dtitvfmt.h(46.63 KB)
?? dtitvinf.h(18.51 KB)
?? dtptngen.h(25.08 KB)
?? dtrule.h(8.68 KB)
?? edits.h(20.74 KB)
?? enumset.h(2.08 KB)
?? errorcode.h(4.84 KB)
?? fieldpos.h(8.69 KB)
?? filteredbrk.h(5.37 KB)
?? fmtable.h(24.42 KB)
?? format.h(12.5 KB)
?? formattedvalue.h(10.27 KB)
?? fpositer.h(3.04 KB)
?? gender.h(3.33 KB)
?? gregocal.h(31.71 KB)
?? icudataver.h(1.03 KB)
?? icuplug.h(11.88 KB)
?? idna.h(12.7 KB)
?? listformatter.h(9.47 KB)
?? localebuilder.h(11.27 KB)
?? localematcher.h(22.5 KB)
?? localpointer.h(19.69 KB)
?? locdspnm.h(7.12 KB)
?? locid.h(47.4 KB)
?? measfmt.h(11.33 KB)
?? measunit.h(93.31 KB)
?? measure.h(4.32 KB)
?? messagepattern.h(33.71 KB)
?? msgfmt.h(44.11 KB)
?? normalizer2.h(34.03 KB)
?? normlzr.h(30.94 KB)
?? nounit.h(2.69 KB)
?? numberformatter.h(86.31 KB)
?? numberrangeformatter.h(30.14 KB)
?? numfmt.h(49.81 KB)
?? numsys.h(7.19 KB)
?? parseerr.h(3.08 KB)
?? parsepos.h(5.56 KB)
?? platform.h(28.08 KB)
?? plurfmt.h(25.2 KB)
?? plurrule.h(18.39 KB)
?? ptypes.h(3.49 KB)
?? putil.h(6.33 KB)
?? rbbi.h(26.58 KB)
?? rbnf.h(48.73 KB)
?? rbtz.h(15.6 KB)
?? regex.h(84.36 KB)
?? region.h(9.18 KB)
?? reldatefmt.h(22.62 KB)
?? rep.h(9.37 KB)
?? resbund.h(18.07 KB)
?? schriter.h(6.32 KB)
?? scientificnumberformatter.h(6.4 KB)
?? search.h(22.22 KB)
?? selfmt.h(14.3 KB)
?? simpleformatter.h(12.59 KB)
?? simpletz.h(45.44 KB)
?? smpdtfmt.h(70.97 KB)
?? sortkey.h(11.18 KB)
?? std_string.h(1.05 KB)
?? strenum.h(9.92 KB)
?? stringoptions.h(5.79 KB)
?? stringpiece.h(7.38 KB)
?? stringtriebuilder.h(15.33 KB)
?? stsearch.h(21.3 KB)
?? symtable.h(4.27 KB)
?? tblcoll.h(36.61 KB)
?? timezone.h(41.02 KB)
?? tmunit.h(3.38 KB)
?? tmutamt.h(4.9 KB)
?? tmutfmt.h(7.85 KB)
?? translit.h(65.82 KB)
?? tzfmt.h(42.89 KB)
?? tznames.h(16.85 KB)
?? tzrule.h(35.37 KB)
?? tztrans.h(6.12 KB)
?? ubidi.h(89.56 KB)
?? ubiditransform.h(12.65 KB)
?? ubrk.h(23.97 KB)
?? ucal.h(56.9 KB)
?? ucasemap.h(15.18 KB)
?? ucat.h(5.36 KB)
?? uchar.h(140.56 KB)
?? ucharstrie.h(22.58 KB)
?? ucharstriebuilder.h(7.21 KB)
?? uchriter.h(13.2 KB)
?? uclean.h(11.21 KB)
?? ucnv.h(83.09 KB)
?? ucnv_cb.h(6.59 KB)
?? ucnv_err.h(20.99 KB)
?? ucnvsel.h(6.14 KB)
?? ucol.h(61.46 KB)
?? ucoleitr.h(9.46 KB)
?? uconfig.h(12.07 KB)
?? ucpmap.h(5.53 KB)
?? ucptrie.h(22.46 KB)
?? ucsdet.h(14.67 KB)
?? ucurr.h(16.12 KB)
?? udat.h(60.88 KB)
?? udata.h(15.56 KB)
?? udateintervalformat.h(10.03 KB)
?? udatpg.h(26.01 KB)
?? udisplaycontext.h(5.89 KB)
?? uenum.h(7.78 KB)
?? ufieldpositer.h(4.36 KB)
?? uformattable.h(10.94 KB)
?? uformattedvalue.h(12.14 KB)
?? ugender.h(2 KB)
?? uidna.h(33.37 KB)
?? uiter.h(22.77 KB)
?? uldnames.h(10.45 KB)
?? ulistformatter.h(8.83 KB)
?? uloc.h(52.54 KB)
?? ulocdata.h(11.26 KB)
?? umachine.h(14.53 KB)
?? umisc.h(1.33 KB)
?? umsg.h(24.23 KB)
?? umutablecptrie.h(8.24 KB)
?? unifilt.h(3.96 KB)
?? unifunct.h(4.04 KB)
?? unimatch.h(6.1 KB)
?? unirepl.h(3.38 KB)
?? uniset.h(64.9 KB)
?? unistr.h(170.43 KB)
?? unorm.h(20.52 KB)
?? unorm2.h(24.66 KB)
?? unum.h(53.62 KB)
?? unumberformatter.h(25.36 KB)
?? unumsys.h(7.21 KB)
?? uobject.h(10.68 KB)
?? upluralrules.h(7.88 KB)
?? uregex.h(72.05 KB)
?? uregion.h(9.84 KB)
?? ureldatefmt.h(17.26 KB)
?? urename.h(130.97 KB)
?? urep.h(5.38 KB)
?? ures.h(36.54 KB)
?? uscript.h(26.87 KB)
?? usearch.h(38.12 KB)
?? uset.h(40 KB)
?? usetiter.h(9.55 KB)
?? ushape.h(18 KB)
?? uspoof.h(65.9 KB)
?? usprep.h(8.14 KB)
?? ustdio.h(38.54 KB)
?? ustream.h(1.89 KB)
?? ustring.h(72.47 KB)
?? ustringtrie.h(3.15 KB)
?? utext.h(58.13 KB)
?? utf.h(7.86 KB)
?? utf16.h(23.32 KB)
?? utf32.h(763 B)
?? utf8.h(30.96 KB)
?? utf_old.h(45.83 KB)
?? utmscale.h(13.78 KB)
?? utrace.h(15.73 KB)
?? utrans.h(25.52 KB)
?? utypes.h(30.74 KB)
?? uvernum.h(6.67 KB)
?? uversion.h(6 KB)
?? vtzone.h(20.3 KB)

Editing: bytestream.h

// © 2016 and later: Unicode, Inc. and others.
// License & terms of use: http://www.unicode.org/copyright.html
// Copyright (C) 2009-2012, International Business Machines
// Corporation and others. All Rights Reserved.
//
// Copyright 2007 Google Inc. All Rights Reserved.
// Author: sanjay@google.com (Sanjay Ghemawat)
//
// Abstract interface that consumes a sequence of bytes (ByteSink).
//
// Used so that we can write a single piece of code that can operate
// on a variety of output string types.
//
// Various implementations of this interface are provided:
//   ByteSink:
//      CheckedArrayByteSink    Write to a flat array, with bounds checking
//      StringByteSink          Write to an STL string

// 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 __BYTESTREAM_H__
#define __BYTESTREAM_H__

/**
 * \file
 * \brief C++ API: Interface for writing bytes, and implementation classes.
 */

#include "unicode/utypes.h"

#if U_SHOW_CPLUSPLUS_API

#include "unicode/uobject.h"
#include "unicode/std_string.h"

U_NAMESPACE_BEGIN

/**
 * A ByteSink can be filled with bytes.
 * @stable ICU 4.2
 */
class U_COMMON_API ByteSink : public UMemory {
public:
  /**
   * Default constructor.
   * @stable ICU 4.2
   */
  ByteSink() { }
  /**
   * Virtual destructor.
   * @stable ICU 4.2
   */
  virtual ~ByteSink();

/**
   * Append "bytes[0,n-1]" to this.
   * @param bytes the pointer to the bytes
   * @param n the number of bytes; must be non-negative
   * @stable ICU 4.2
   */
  virtual void Append(const char* bytes, int32_t n) = 0;

/**
   * Returns a writable buffer for appending and writes the buffer's capacity to
   * *result_capacity. Guarantees *result_capacity>=min_capacity.
   * May return a pointer to the caller-owned scratch buffer which must have
   * scratch_capacity>=min_capacity.
   * The returned buffer is only valid until the next operation
   * on this ByteSink.
   *
   * After writing at most *result_capacity bytes, call Append() with the
   * pointer returned from this function and the number of bytes written.
   * Many Append() implementations will avoid copying bytes if this function
   * returned an internal buffer.
   *
   * Partial usage example:
   *  int32_t capacity;
   *  char* buffer = sink->GetAppendBuffer(..., &capacity);
   *  ... Write n bytes into buffer, with n <= capacity.
   *  sink->Append(buffer, n);
   * In many implementations, that call to Append will avoid copying bytes.
   *
   * If the ByteSink allocates or reallocates an internal buffer, it should use
   * the desired_capacity_hint if appropriate.
   * If a caller cannot provide a reasonable guess at the desired capacity,
   * it should pass desired_capacity_hint=0.
   *
   * If a non-scratch buffer is returned, the caller may only pass
   * a prefix to it to Append().
   * That is, it is not correct to pass an interior pointer to Append().
   *
   * The default implementation always returns the scratch buffer.
   *
   * @param min_capacity required minimum capacity of the returned buffer;
   *                     must be non-negative
   * @param desired_capacity_hint desired capacity of the returned buffer;
   *                              must be non-negative
   * @param scratch default caller-owned buffer
   * @param scratch_capacity capacity of the scratch buffer
   * @param result_capacity pointer to an integer which will be set to the
   *                        capacity of the returned buffer
   * @return a buffer with *result_capacity>=min_capacity
   * @stable ICU 4.2
   */
  virtual char* GetAppendBuffer(int32_t min_capacity,
                                int32_t desired_capacity_hint,
                                char* scratch, int32_t scratch_capacity,
                                int32_t* result_capacity);

/**
   * Flush internal buffers.
   * Some byte sinks use internal buffers or provide buffering
   * and require calling Flush() at the end of the stream.
   * The ByteSink should be ready for further Append() calls after Flush().
   * The default implementation of Flush() does nothing.
   * @stable ICU 4.2
   */
  virtual void Flush();

private:
  ByteSink(const ByteSink &) = delete;
  ByteSink &operator=(const ByteSink &) = delete;
};

// -------------------------------------------------------------
// Some standard implementations

/** 
 * Implementation of ByteSink that writes to a flat byte array,
 * with bounds-checking:
 * This sink will not write more than capacity bytes to outbuf.
 * If more than capacity bytes are Append()ed, then excess bytes are ignored,
 * and Overflowed() will return true.
 * Overflow does not cause a runtime error.
 * @stable ICU 4.2
 */
class U_COMMON_API CheckedArrayByteSink : public ByteSink {
public:
  /**
   * Constructs a ByteSink that will write to outbuf[0..capacity-1].
   * @param outbuf buffer to write to
   * @param capacity size of the buffer
   * @stable ICU 4.2
   */
  CheckedArrayByteSink(char* outbuf, int32_t capacity);
  /**
   * Destructor.
   * @stable ICU 4.2
   */
  virtual ~CheckedArrayByteSink();
  /**
   * Returns the sink to its original state, without modifying the buffer.
   * Useful for reusing both the buffer and the sink for multiple streams.
   * Resets the state to NumberOfBytesWritten()=NumberOfBytesAppended()=0
   * and Overflowed()=FALSE.
   * @return *this
   * @stable ICU 4.6
   */
  virtual CheckedArrayByteSink& Reset();
  /**
   * Append "bytes[0,n-1]" to this.
   * @param bytes the pointer to the bytes
   * @param n the number of bytes; must be non-negative
   * @stable ICU 4.2
   */
  virtual void Append(const char* bytes, int32_t n);
  /**
   * Returns a writable buffer for appending and writes the buffer's capacity to
   * *result_capacity. For details see the base class documentation.
   * @param min_capacity required minimum capacity of the returned buffer;
   *                     must be non-negative
   * @param desired_capacity_hint desired capacity of the returned buffer;
   *                              must be non-negative
   * @param scratch default caller-owned buffer
   * @param scratch_capacity capacity of the scratch buffer
   * @param result_capacity pointer to an integer which will be set to the
   *                        capacity of the returned buffer
   * @return a buffer with *result_capacity>=min_capacity
   * @stable ICU 4.2
   */
  virtual char* GetAppendBuffer(int32_t min_capacity,
                                int32_t desired_capacity_hint,
                                char* scratch, int32_t scratch_capacity,
                                int32_t* result_capacity);
  /**
   * Returns the number of bytes actually written to the sink.
   * @return number of bytes written to the buffer
   * @stable ICU 4.2
   */
  int32_t NumberOfBytesWritten() const { return size_; }
  /**
   * Returns true if any bytes were discarded, i.e., if there was an
   * attempt to write more than 'capacity' bytes.
   * @return TRUE if more than 'capacity' bytes were Append()ed
   * @stable ICU 4.2
   */
  UBool Overflowed() const { return overflowed_; }
  /**
   * Returns the number of bytes appended to the sink.
   * If Overflowed() then NumberOfBytesAppended()>NumberOfBytesWritten()
   * else they return the same number.
   * @return number of bytes written to the buffer
   * @stable ICU 4.6
   */
  int32_t NumberOfBytesAppended() const { return appended_; }
private:
  char* outbuf_;
  const int32_t capacity_;
  int32_t size_;
  int32_t appended_;
  UBool overflowed_;

CheckedArrayByteSink() = delete;
  CheckedArrayByteSink(const CheckedArrayByteSink &) = delete;
  CheckedArrayByteSink &operator=(const CheckedArrayByteSink &) = delete;
};

/** 
 * Implementation of ByteSink that writes to a "string".
 * The StringClass is usually instantiated with a std::string.
 * @stable ICU 4.2
 */
template<typename StringClass>
class StringByteSink : public ByteSink {
 public:
  /**
   * Constructs a ByteSink that will append bytes to the dest string.
   * @param dest pointer to string object to append to
   * @stable ICU 4.2
   */
  StringByteSink(StringClass* dest) : dest_(dest) { }
  /**
   * Constructs a ByteSink that reserves append capacity and will append bytes to the dest string.
   * 
   * @param dest pointer to string object to append to
   * @param initialAppendCapacity capacity beyond dest->length() to be reserve()d
   * @stable ICU 60
   */
  StringByteSink(StringClass* dest, int32_t initialAppendCapacity) : dest_(dest) {
    if (initialAppendCapacity > 0 &&
        (uint32_t)initialAppendCapacity > (dest->capacity() - dest->length())) {
      dest->reserve(dest->length() + initialAppendCapacity);
    }
  }
  /**
   * Append "bytes[0,n-1]" to this.
   * @param data the pointer to the bytes
   * @param n the number of bytes; must be non-negative
   * @stable ICU 4.2
   */
  virtual void Append(const char* data, int32_t n) { dest_->append(data, n); }
 private:
  StringClass* dest_;

StringByteSink() = delete;
  StringByteSink(const StringByteSink &) = delete;
  StringByteSink &operator=(const StringByteSink &) = delete;
};

U_NAMESPACE_END

#endif /* U_SHOW_CPLUSPLUS_API */

#endif  // __BYTESTREAM_H__

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