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Size
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Date
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alphaindex.h
26.54
KB
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2024-06-13 15:30
appendable.h
8.54
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2024-06-13 15:30
basictz.h
9.99
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2024-06-13 15:30
brkiter.h
27.83
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2024-06-13 15:30
bytestream.h
10.75
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2024-06-13 15:30
bytestrie.h
20.8
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2024-06-13 15:30
bytestriebuilder.h
7.48
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2024-06-13 15:30
calendar.h
107.68
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2024-06-13 15:30
caniter.h
7.53
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2024-06-13 15:30
casemap.h
25.42
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2024-06-13 15:30
char16ptr.h
7.22
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2024-06-13 15:30
chariter.h
23.79
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2024-06-13 15:30
choicfmt.h
23.99
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2024-06-13 15:30
coleitr.h
13.77
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2024-06-13 15:30
coll.h
56.28
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2024-06-13 15:30
compactdecimalformat.h
6.88
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2024-06-13 15:30
curramt.h
3.67
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2024-06-13 15:30
currpinf.h
7.3
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2024-06-13 15:30
currunit.h
4.02
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2024-06-13 15:30
datefmt.h
40.7
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2024-06-13 15:30
dbbi.h
1.19
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2024-06-13 15:30
dcfmtsym.h
20.93
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2024-06-13 15:30
decimfmt.h
87.46
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2024-06-13 15:30
displayoptions.h
7.08
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2024-06-13 15:30
docmain.h
7.46
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2024-06-13 15:30
dtfmtsym.h
38.21
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2024-06-13 15:30
dtintrv.h
3.84
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2024-06-13 15:30
dtitvfmt.h
48.87
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2024-06-13 15:30
dtitvinf.h
18.63
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2024-06-13 15:30
dtptngen.h
28.05
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2024-06-13 15:30
dtrule.h
8.66
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2024-06-13 15:30
edits.h
20.73
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2024-06-13 15:30
enumset.h
2.08
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2024-06-13 15:30
errorcode.h
4.84
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2024-06-13 15:30
fieldpos.h
8.69
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2024-06-13 15:30
filteredbrk.h
5.37
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2024-06-13 15:30
fmtable.h
24.36
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2024-06-13 15:30
format.h
12.5
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2024-06-13 15:30
formattednumber.h
6.28
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2024-06-13 15:30
formattedvalue.h
9.75
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2024-06-13 15:30
fpositer.h
3.03
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2024-06-13 15:30
gender.h
3.35
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2024-06-13 15:30
gregocal.h
30.3
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2024-06-13 15:30
icudataver.h
1.02
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2024-06-13 15:30
icuplug.h
12.1
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2024-06-13 15:30
idna.h
12.71
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2024-06-13 15:30
listformatter.h
8.59
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2024-06-13 15:30
localebuilder.h
11.08
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2024-06-13 15:30
localematcher.h
26.86
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2024-06-13 15:30
localpointer.h
19.55
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2024-06-13 15:30
locdspnm.h
7.12
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2024-06-13 15:30
locid.h
48.31
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2024-06-13 15:30
measfmt.h
11.41
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2024-06-13 15:30
measunit.h
108.23
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2024-06-13 15:30
measure.h
4.68
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2024-06-13 15:30
messageformat2.h
18.13
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2024-06-13 15:30
messageformat2_arguments.h
4.3
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2024-06-13 15:30
messageformat2_data_model.h
123
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2024-06-13 15:30
messageformat2_data_model_names.h
784
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2024-06-13 15:30
messageformat2_formattable.h
38.29
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2024-06-13 15:30
messageformat2_function_registry.h
18
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2024-06-13 15:30
messagepattern.h
33.72
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2024-06-13 15:30
msgfmt.h
44.2
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2024-06-13 15:30
normalizer2.h
34.73
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2024-06-13 15:30
normlzr.h
30.79
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2024-06-13 15:30
nounit.h
2.24
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2024-06-13 15:30
numberformatter.h
90.74
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2024-06-13 15:30
numberrangeformatter.h
26.05
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2024-06-13 15:30
numfmt.h
50.16
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2024-06-13 15:30
numsys.h
7.22
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2024-06-13 15:30
parseerr.h
3.08
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2024-06-13 15:30
parsepos.h
5.56
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2024-06-13 15:30
platform.h
26.66
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2024-06-13 15:30
plurfmt.h
25.07
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2024-06-13 15:30
plurrule.h
20.63
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2024-06-13 15:30
ptypes.h
2.16
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2024-06-13 15:30
putil.h
6.32
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2024-06-13 15:30
rbbi.h
32.04
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2024-06-13 15:30
rbnf.h
50.53
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2024-06-13 15:30
rbtz.h
15.75
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2024-06-13 15:30
regex.h
84.45
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2024-06-13 15:30
region.h
9.2
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2024-06-13 15:30
reldatefmt.h
22.36
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2024-06-13 15:30
rep.h
9.38
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2024-06-13 15:30
resbund.h
18.03
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schriter.h
6.09
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2024-06-13 15:30
scientificnumberformatter.h
6.44
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2024-06-13 15:30
search.h
22.21
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2024-06-13 15:30
selfmt.h
14.35
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2024-06-13 15:30
simpleformatter.h
12.58
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2024-06-13 15:30
simplenumberformatter.h
9.18
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2024-06-13 15:30
simpletz.h
45.62
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2024-06-13 15:30
smpdtfmt.h
57.06
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2024-06-13 15:30
sortkey.h
11.12
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2024-06-13 15:30
std_string.h
1.05
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2024-06-13 15:30
strenum.h
9.96
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2024-06-13 15:30
stringoptions.h
5.79
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2024-06-13 15:30
stringpiece.h
10.02
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2024-06-13 15:30
stringtriebuilder.h
15.5
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2024-06-13 15:30
stsearch.h
21.43
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2024-06-13 15:30
symtable.h
4.28
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2024-06-13 15:30
tblcoll.h
36.93
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2024-06-13 15:30
timezone.h
45.64
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tmunit.h
3.4
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tmutamt.h
4.9
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tmutfmt.h
7.42
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translit.h
65.8
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2024-06-13 15:30
tzfmt.h
42.95
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tznames.h
16.85
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tzrule.h
34.81
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tztrans.h
6.11
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ubidi.h
89.61
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2024-06-13 15:30
ubiditransform.h
12.71
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ubrk.h
24.43
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2024-06-13 15:30
ucal.h
64.01
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ucasemap.h
15.21
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ucat.h
5.35
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uchar.h
150.13
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ucharstrie.h
22.56
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2024-06-13 15:30
ucharstriebuilder.h
7.48
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2024-06-13 15:30
uchriter.h
13.24
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2024-06-13 15:30
uclean.h
11.21
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ucnv.h
83.34
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ucnv_cb.h
6.58
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ucnv_err.h
20.98
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2024-06-13 15:30
ucnvsel.h
6.24
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2024-06-13 15:30
ucol.h
62.7
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2024-06-13 15:30
ucoleitr.h
9.82
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2024-06-13 15:30
uconfig.h
12.56
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2024-06-13 15:30
ucpmap.h
5.54
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ucptrie.h
22.51
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ucsdet.h
14.69
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ucurr.h
16.72
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2024-06-13 15:30
udat.h
62.36
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2024-06-13 15:30
udata.h
15.63
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2024-06-13 15:30
udateintervalformat.h
11.93
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2024-06-13 15:30
udatpg.h
30.13
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2024-06-13 15:30
udisplaycontext.h
5.94
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udisplayoptions.h
8.86
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2024-06-13 15:30
uenum.h
7.79
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2024-06-13 15:30
ufieldpositer.h
4.41
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2024-06-13 15:30
uformattable.h
10.97
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2024-06-13 15:30
uformattednumber.h
8.09
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2024-06-13 15:30
uformattedvalue.h
12.25
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ugender.h
2.06
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uidna.h
33.43
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uiter.h
22.75
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uldnames.h
10.48
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ulistformatter.h
10.78
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2024-06-13 15:30
uloc.h
55.38
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ulocale.h
6.35
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2024-06-13 15:30
ulocbuilder.h
16.73
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ulocdata.h
11.3
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umachine.h
14.59
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umisc.h
1.34
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umsg.h
24.25
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umutablecptrie.h
8.3
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unifilt.h
4
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unifunct.h
4.05
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unimatch.h
6.1
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unirepl.h
3.38
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uniset.h
66.82
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unistr.h
171.33
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unorm.h
20.55
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unorm2.h
25.71
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2024-06-13 15:30
unum.h
55.16
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unumberformatter.h
19.68
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unumberoptions.h
5.23
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unumberrangeformatter.h
15.35
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unumsys.h
7.26
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uobject.h
10.66
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upluralrules.h
8.79
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uregex.h
71.99
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uregion.h
9.81
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ureldatefmt.h
16.98
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urename.h
141.31
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urep.h
5.38
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ures.h
36.65
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uscript.h
27.89
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usearch.h
39.21
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uset.h
45.56
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usetiter.h
9.63
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ushape.h
18
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usimplenumberformatter.h
7.63
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uspoof.h
80.32
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usprep.h
8.19
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ustdio.h
38.56
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ustream.h
1.89
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ustring.h
72.13
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ustringtrie.h
3.15
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utext.h
58.1
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utf.h
7.87
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utf16.h
23.35
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utf32.h
763
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utf8.h
30.83
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utf_old.h
45.8
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utmscale.h
13.78
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utrace.h
17.18
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2024-06-13 15:30
utrans.h
25.54
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utypes.h
33.71
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uvernum.h
6.33
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2024-06-13 15:30
uversion.h
5.99
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2024-06-13 15:30
vtzone.h
20.68
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2024-06-13 15:30
Save
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 <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); /** * 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_EXPORT 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__