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05/14/2024 03:54:45 PM
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alphaindex.h
26.52 KB
12/01/2022 11:12:33 AM
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appendable.h
8.53 KB
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basictz.h
9.86 KB
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brkiter.h
27.81 KB
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bytestream.h
10.75 KB
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bytestrie.h
20.77 KB
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bytestriebuilder.h
7.46 KB
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calendar.h
105.88 KB
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caniter.h
7.44 KB
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casemap.h
25.33 KB
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char16ptr.h
7.22 KB
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chariter.h
24.06 KB
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choicfmt.h
23.97 KB
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coleitr.h
13.77 KB
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coll.h
56.26 KB
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compactdecimalformat.h
6.88 KB
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curramt.h
3.78 KB
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currpinf.h
7.3 KB
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currunit.h
4.02 KB
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datefmt.h
40.71 KB
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dbbi.h
1.19 KB
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dcfmtsym.h
20.61 KB
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decimfmt.h
87.57 KB
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docmain.h
7.21 KB
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dtfmtsym.h
38.21 KB
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dtintrv.h
3.84 KB
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dtitvfmt.h
49.27 KB
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dtitvinf.h
18.63 KB
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dtptngen.h
28.84 KB
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dtrule.h
8.69 KB
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edits.h
20.74 KB
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enumset.h
2.08 KB
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errorcode.h
4.84 KB
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fieldpos.h
8.7 KB
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filteredbrk.h
5.37 KB
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fmtable.h
24.43 KB
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format.h
12.5 KB
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formattedvalue.h
9.75 KB
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fpositer.h
3.03 KB
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gender.h
3.33 KB
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gregocal.h
31.88 KB
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icudataver.h
1.02 KB
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icuplug.h
11.83 KB
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idna.h
12.7 KB
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listformatter.h
8.79 KB
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localebuilder.h
11.08 KB
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localematcher.h
26.84 KB
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localpointer.h
19.36 KB
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locdspnm.h
7.12 KB
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locid.h
47.66 KB
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measfmt.h
11.42 KB
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measunit.h
104.97 KB
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measure.h
4.33 KB
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messagepattern.h
33.71 KB
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msgfmt.h
44.22 KB
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normalizer2.h
33.66 KB
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normlzr.h
30.95 KB
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nounit.h
2.25 KB
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numberformatter.h
94.15 KB
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numberrangeformatter.h
25.19 KB
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numfmt.h
49.84 KB
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numsys.h
7.33 KB
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parseerr.h
3.08 KB
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parsepos.h
5.57 KB
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platform.h
28.09 KB
12/01/2022 11:12:33 AM
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plurfmt.h
25.24 KB
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plurrule.h
20.82 KB
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ptypes.h
3.49 KB
12/01/2022 11:12:33 AM
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putil.h
6.32 KB
12/01/2022 11:12:33 AM
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rbbi.h
28.64 KB
12/01/2022 11:12:33 AM
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rbnf.h
48.85 KB
12/01/2022 11:12:33 AM
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rbtz.h
15.77 KB
12/01/2022 11:12:33 AM
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regex.h
84.36 KB
12/01/2022 11:12:33 AM
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region.h
9.18 KB
12/01/2022 11:12:33 AM
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reldatefmt.h
22.22 KB
12/01/2022 11:12:33 AM
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rep.h
9.37 KB
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resbund.h
18.08 KB
12/01/2022 11:12:33 AM
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schriter.h
6.36 KB
12/01/2022 11:12:33 AM
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scientificnumberformatter.h
6.43 KB
12/01/2022 11:12:33 AM
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search.h
22.22 KB
12/01/2022 11:12:33 AM
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selfmt.h
14.34 KB
12/01/2022 11:12:33 AM
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simpleformatter.h
12.59 KB
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simpletz.h
45.64 KB
12/01/2022 11:12:33 AM
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smpdtfmt.h
71.07 KB
12/01/2022 11:12:33 AM
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sortkey.h
11.18 KB
12/01/2022 11:12:33 AM
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std_string.h
1.05 KB
12/01/2022 11:12:33 AM
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strenum.h
9.92 KB
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stringoptions.h
5.79 KB
12/01/2022 11:12:33 AM
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stringpiece.h
10.05 KB
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stringtriebuilder.h
15.47 KB
12/01/2022 11:12:33 AM
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stsearch.h
21.41 KB
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symtable.h
4.27 KB
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tblcoll.h
36.92 KB
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timezone.h
43.81 KB
12/01/2022 11:12:33 AM
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tmunit.h
3.4 KB
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tmutamt.h
4.91 KB
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tmutfmt.h
7.42 KB
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translit.h
65.82 KB
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tzfmt.h
42.93 KB
12/01/2022 11:12:33 AM
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tznames.h
16.85 KB
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tzrule.h
35.6 KB
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tztrans.h
6.13 KB
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ubidi.h
89.61 KB
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ubiditransform.h
12.7 KB
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ubrk.h
24.43 KB
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ucal.h
60.68 KB
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ucasemap.h
15.21 KB
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ucat.h
5.35 KB
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uchar.h
144.64 KB
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ucharstrie.h
22.53 KB
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ucharstriebuilder.h
7.47 KB
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uchriter.h
13.42 KB
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uclean.h
11.2 KB
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ucnv.h
83.46 KB
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ucnv_cb.h
6.58 KB
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ucnv_err.h
20.98 KB
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ucnvsel.h
6.19 KB
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ucol.h
61.95 KB
12/01/2022 11:12:33 AM
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ucoleitr.h
9.82 KB
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uconfig.h
12.07 KB
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ucpmap.h
5.53 KB
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ucptrie.h
22.5 KB
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ucsdet.h
14.69 KB
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ucurr.h
16.72 KB
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udat.h
62.4 KB
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udata.h
15.63 KB
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udateintervalformat.h
11.93 KB
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udatpg.h
30.18 KB
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udisplaycontext.h
5.94 KB
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uenum.h
7.79 KB
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ufieldpositer.h
4.41 KB
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uformattable.h
10.97 KB
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uformattedvalue.h
12.3 KB
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ugender.h
2.06 KB
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uidna.h
33.43 KB
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uiter.h
22.75 KB
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uldnames.h
10.48 KB
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ulistformatter.h
10.78 KB
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uloc.h
54.63 KB
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ulocdata.h
11.3 KB
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umachine.h
16.05 KB
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umisc.h
1.33 KB
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umsg.h
24.25 KB
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umutablecptrie.h
8.29 KB
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unifilt.h
4 KB
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unifunct.h
4.05 KB
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unimatch.h
6.1 KB
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unirepl.h
3.38 KB
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uniset.h
66.46 KB
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unistr.h
170.53 KB
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unorm.h
20.55 KB
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unorm2.h
24.68 KB
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unounclass.h
735 bytes
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unum.h
55.31 KB
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unumberformatter.h
30.28 KB
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unumberrangeformatter.h
15.37 KB
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unumsys.h
7.26 KB
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uobject.h
10.68 KB
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upluralrules.h
8.79 KB
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uregex.h
71.99 KB
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uregion.h
9.81 KB
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ureldatefmt.h
17.04 KB
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urename.h
135 KB
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urep.h
5.38 KB
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ures.h
36.54 KB
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uscript.h
27.63 KB
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usearch.h
39.21 KB
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uset.h
44.29 KB
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usetiter.h
9.68 KB
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ushape.h
18 KB
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uspoof.h
65.84 KB
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usprep.h
8.19 KB
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ustdio.h
38.56 KB
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ustream.h
1.89 KB
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ustring.h
72.36 KB
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ustringtrie.h
3.15 KB
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utext.h
58.08 KB
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utf.h
7.87 KB
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utf16.h
23.35 KB
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utf32.h
763 bytes
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utf8.h
30.83 KB
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utf_old.h
45.83 KB
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utmscale.h
13.78 KB
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utrace.h
17.18 KB
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utrans.h
25.54 KB
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utypes.h
31.06 KB
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uvernum.h
6.68 KB
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uversion.h
5.99 KB
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vtzone.h
20.74 KB
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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" #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; /** * Appends n bytes to this. Same as Append(). * Call AppendU8() with u8"string literals" which are const char * in C++11 * but const char8_t * in C++20. * If the compiler does support char8_t as a distinct type, * then an AppendU8() overload for that is defined and will be chosen. * * @param bytes the pointer to the bytes * @param n the number of bytes; must be non-negative * @stable ICU 67 */ inline void AppendU8(const char* bytes, int32_t n) { Append(bytes, n); } #if defined(__cpp_char8_t) || defined(U_IN_DOXYGEN) /** * Appends n bytes to this. Same as Append() but for a const char8_t * pointer. * Call AppendU8() with u8"string literals" which are const char * in C++11 * but const char8_t * in C++20. * If the compiler does support char8_t as a distinct type, * then this AppendU8() overload for that is defined and will be chosen. * * @param bytes the pointer to the bytes * @param n the number of bytes; must be non-negative * @stable ICU 67 */ inline void AppendU8(const char8_t* bytes, int32_t n) { Append(reinterpret_cast<const char*>(bytes), n); } #endif /** * 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) override; /** * 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) override; /** * 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) override { 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__