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10/28/2024 06:50:42 AM
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alphaindex.h
26.27 KB
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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
55.61 KB
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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
89.73 KB
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docmain.h
6.56 KB
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dtfmtsym.h
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dtintrv.h
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dtitvfmt.h
42.87 KB
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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
12.63 KB
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listformatter.h
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localpointer.h
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locdspnm.h
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locid.h
31.4 KB
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measfmt.h
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measunit.h
37.74 KB
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measure.h
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messagepattern.h
33.64 KB
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msgfmt.h
43.16 KB
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normalizer2.h
33.97 KB
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normlzr.h
30.74 KB
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nounit.h
2.6 KB
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numberformatter.h
64.98 KB
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numfmt.h
47.76 KB
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numsys.h
6.73 KB
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parseerr.h
3.08 KB
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parsepos.h
5.45 KB
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platform.h
27.71 KB
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plurfmt.h
25.66 KB
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plurrule.h
18.34 KB
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ptypes.h
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putil.h
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rbbi.h
27.09 KB
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rbnf.h
49.76 KB
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rbtz.h
15.47 KB
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regex.h
84.91 KB
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region.h
9.12 KB
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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
3.29 KB
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tmutamt.h
4.8 KB
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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
6.07 KB
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ubidi.h
89.28 KB
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ubiditransform.h
12.71 KB
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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
5.36 KB
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uchar.h
131.61 KB
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ucharstrie.h
21.06 KB
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ucharstriebuilder.h
7.14 KB
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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
6.59 KB
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ucnv_err.h
20.98 KB
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ucnvsel.h
6.14 KB
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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
14.67 KB
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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
24.11 KB
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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
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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
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urep.h
5.38 KB
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ures.h
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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
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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
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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
13.89 KB
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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: bytestream.h
Close
// © 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" #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) { } #ifndef U_HIDE_DRAFT_API /** * 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 * @draft 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); } } #endif // U_HIDE_DRAFT_API /** * 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 // __BYTESTREAM_H__