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alphaindex.h
26.25
KB
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2019-10-10 05:03
appendable.h
8.38
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2019-10-10 05:03
basictz.h
8.85
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2019-10-10 05:03
brkiter.h
27.62
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2019-10-10 05:03
bytestream.h
9.28
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2019-10-10 05:03
bytestrie.h
19.27
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2019-10-10 05:03
bytestriebuilder.h
7.11
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2019-10-10 05:03
calendar.h
105.38
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2019-10-10 05:03
caniter.h
7.36
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2019-10-10 05:03
chariter.h
23.83
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2019-10-10 05:03
choicfmt.h
23.86
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2019-10-10 05:03
coleitr.h
13.69
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2019-10-10 05:03
coll.h
55.59
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2019-10-10 05:03
compactdecimalformat.h
16.59
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2019-10-10 05:03
curramt.h
3.69
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2019-10-10 05:03
currpinf.h
7.09
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2019-10-10 05:03
currunit.h
2.93
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2019-10-10 05:03
datefmt.h
40.19
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2019-10-10 05:03
dbbi.h
1.12
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2019-10-10 05:03
dcfmtsym.h
16.58
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2019-10-10 05:03
decimfmt.h
90.64
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2019-10-10 05:03
docmain.h
6.42
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2019-10-10 05:03
dtfmtsym.h
37.61
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2019-10-10 05:03
dtintrv.h
3.77
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2019-10-10 05:03
dtitvfmt.h
42.88
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2019-10-10 05:03
dtitvinf.h
18.63
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2019-10-10 05:03
dtptngen.h
23.54
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2019-10-10 05:03
dtrule.h
8.63
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2019-10-10 05:03
enumset.h
2.07
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2019-10-10 05:03
errorcode.h
4.79
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2019-10-10 05:03
fieldpos.h
8.64
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2019-10-10 05:03
filteredbrk.h
4.29
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2019-10-10 05:03
fmtable.h
24.4
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2019-10-10 05:03
format.h
12.45
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2019-10-10 05:03
fpositer.h
2.99
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2019-10-10 05:03
gender.h
3.19
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2019-10-10 05:03
gregocal.h
31.58
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2019-10-10 05:03
icudataver.h
1.04
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2019-10-10 05:03
icuplug.h
11.87
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2019-10-10 05:03
idna.h
12.65
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2019-10-10 05:03
listformatter.h
4.85
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2019-10-10 05:03
localpointer.h
18.19
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2019-10-10 05:03
locdspnm.h
7.04
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2019-10-10 05:03
locid.h
31.42
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2019-10-10 05:03
measfmt.h
11.31
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2019-10-10 05:03
measunit.h
38.43
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2019-10-10 05:03
measure.h
4.27
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2019-10-10 05:03
messagepattern.h
33.66
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2019-10-10 05:03
msgfmt.h
43.17
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2019-10-10 05:03
normalizer2.h
28.29
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2019-10-10 05:03
normlzr.h
30.72
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2019-10-10 05:03
numfmt.h
45.98
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2019-10-10 05:03
numsys.h
6.74
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2019-10-10 05:03
parseerr.h
3.09
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2019-10-10 05:03
parsepos.h
5.46
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2019-10-10 05:03
platform.h
27.25
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2019-10-10 05:03
plurfmt.h
25.67
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2019-10-10 05:03
plurrule.h
17.28
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2019-10-10 05:03
ptypes.h
3.48
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2019-10-10 05:03
putil.h
6.35
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2019-10-10 05:03
rbbi.h
27.78
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2019-10-10 05:03
rbnf.h
47.01
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2019-10-10 05:03
rbtz.h
15.48
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2019-10-10 05:03
regex.h
84.88
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2019-10-10 05:03
region.h
9.13
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2019-10-10 05:03
reldatefmt.h
14.34
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2019-10-10 05:03
rep.h
9.5
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2019-10-10 05:03
resbund.h
18.01
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2019-10-10 05:03
schriter.h
6.27
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2019-10-10 05:03
scientificnumberformatter.h
6.6
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2019-10-10 05:03
search.h
22.22
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2019-10-10 05:03
selfmt.h
14.25
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2019-10-10 05:03
simpleformatter.h
11.26
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2019-10-10 05:03
simpletz.h
45.25
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2019-10-10 05:03
smpdtfmt.h
69.73
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2019-10-10 05:03
sortkey.h
11.13
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2019-10-10 05:03
std_string.h
1
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2019-10-10 05:03
strenum.h
10.04
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2019-10-10 05:03
stringpiece.h
6.49
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2019-10-10 05:03
stringtriebuilder.h
15.17
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2019-10-10 05:03
stsearch.h
21.3
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2019-10-10 05:03
symtable.h
4.22
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2019-10-10 05:03
tblcoll.h
36.37
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2019-10-10 05:03
timezone.h
40.83
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2019-10-10 05:03
tmunit.h
3.3
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2019-10-10 05:03
tmutamt.h
4.81
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2019-10-10 05:03
tmutfmt.h
7.8
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2019-10-10 05:03
translit.h
54.53
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2019-10-10 05:03
tzfmt.h
42.81
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2019-10-10 05:03
tznames.h
16.86
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2019-10-10 05:03
tzrule.h
35.33
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2019-10-10 05:03
tztrans.h
6.08
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2019-10-10 05:03
ubidi.h
89.14
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2019-10-10 05:03
ubiditransform.h
12.76
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2019-10-10 05:03
ubrk.h
20.74
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2019-10-10 05:03
ucal.h
54.55
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2019-10-10 05:03
ucasemap.h
16.57
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2019-10-10 05:03
ucat.h
5.37
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2019-10-10 05:03
uchar.h
130.91
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2019-10-10 05:03
ucharstrie.h
20.92
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2019-10-10 05:03
ucharstriebuilder.h
7.13
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2019-10-10 05:03
uchriter.h
12.95
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2019-10-10 05:03
uclean.h
11.15
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2019-10-10 05:03
ucnv.h
83.07
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2019-10-10 05:03
ucnv_cb.h
6.6
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2019-10-10 05:03
ucnv_err.h
21
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2019-10-10 05:03
ucnvsel.h
6.15
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2019-10-10 05:03
ucol.h
61.36
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2019-10-10 05:03
ucoleitr.h
9.46
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2019-10-10 05:03
uconfig.h
11.88
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2019-10-10 05:03
ucsdet.h
14.47
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2019-10-10 05:03
ucurr.h
15.16
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2019-10-10 05:03
udat.h
60.25
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2019-10-10 05:03
udata.h
15.55
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2019-10-10 05:03
udateintervalformat.h
6.8
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2019-10-10 05:03
udatpg.h
24.12
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2019-10-10 05:03
udisplaycontext.h
6
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2019-10-10 05:03
uenum.h
7.88
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2019-10-10 05:03
ufieldpositer.h
4.37
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2019-10-10 05:03
uformattable.h
10.94
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2019-10-10 05:03
ugender.h
2.01
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2019-10-10 05:03
uidna.h
33.38
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2019-10-10 05:03
uiter.h
22.79
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2019-10-10 05:03
uldnames.h
10.46
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2019-10-10 05:03
ulistformatter.h
4.55
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2019-10-10 05:03
uloc.h
50.07
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2019-10-10 05:03
ulocdata.h
11.27
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2019-10-10 05:03
umachine.h
11.56
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2019-10-10 05:03
umisc.h
1.35
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2019-10-10 05:03
umsg.h
24.24
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2019-10-10 05:03
unifilt.h
3.64
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2019-10-10 05:03
unifunct.h
3.99
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2019-10-10 05:03
unimatch.h
6.05
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2019-10-10 05:03
unirepl.h
3.33
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uniset.h
63.99
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unistr.h
169.99
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unorm.h
20.43
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unorm2.h
25.23
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2019-10-10 05:03
unum.h
50.01
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2019-10-10 05:03
unumsys.h
7.15
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2019-10-10 05:03
uobject.h
10.73
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2019-10-10 05:03
upluralrules.h
4.74
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2019-10-10 05:03
uregex.h
72.07
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uregion.h
9.84
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2019-10-10 05:03
ureldatefmt.h
12.31
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2019-10-10 05:03
urename.h
124.22
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urep.h
5.39
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ures.h
36.53
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uscript.h
25.66
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2019-10-10 05:03
usearch.h
38.15
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uset.h
39.92
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usetiter.h
9.5
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ushape.h
18.01
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uspoof.h
65.05
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usprep.h
8.14
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ustdio.h
38.55
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ustream.h
1.92
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ustring.h
72.81
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2019-10-10 05:03
ustringtrie.h
3.16
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utext.h
58.09
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utf.h
7.76
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2019-10-10 05:03
utf16.h
18.75
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utf32.h
777
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2019-10-10 05:03
utf8.h
27.74
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2019-10-10 05:03
utf_old.h
42.62
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2019-10-10 05:03
utmscale.h
13.49
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2019-10-10 05:03
utrace.h
13.9
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utrans.h
25.54
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utypes.h
29.92
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2019-10-10 05:03
uvernum.h
5.71
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uversion.h
6.42
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2019-10-10 05:03
vtzone.h
20.18
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2019-10-10 05:03
Save
Rename
// Copyright (C) 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 &); // copy constructor not implemented ByteSink &operator=(const ByteSink &); // assignment operator not implemented }; // ------------------------------------------------------------- // 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(); ///< default constructor not implemented CheckedArrayByteSink(const CheckedArrayByteSink &); ///< copy constructor not implemented CheckedArrayByteSink &operator=(const CheckedArrayByteSink &); ///< assignment operator not implemented }; #if U_HAVE_STD_STRING /** * 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) { } /** * 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(); ///< default constructor not implemented StringByteSink(const StringByteSink &); ///< copy constructor not implemented StringByteSink &operator=(const StringByteSink &); ///< assignment operator not implemented }; #endif U_NAMESPACE_END #endif // __BYTESTREAM_H__