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Name
Size
Permission
Date
Action
alphaindex.h
26.54
KB
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2025-06-06 11:26
appendable.h
8.54
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2025-06-06 11:26
basictz.h
9.99
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2025-06-06 11:26
brkiter.h
27.84
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2025-06-06 11:26
bytestream.h
10.77
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2025-06-06 11:26
bytestrie.h
20.83
KB
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2025-06-06 11:26
bytestriebuilder.h
7.48
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2025-06-06 11:26
calendar.h
107.54
KB
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2025-06-06 11:26
caniter.h
7.53
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2025-06-06 11:26
casemap.h
25.42
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2025-06-06 11:26
char16ptr.h
10.79
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2025-06-06 11:26
chariter.h
23.79
KB
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2025-06-06 11:26
choicfmt.h
23.99
KB
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2025-06-06 11:26
coleitr.h
13.78
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2025-06-06 11:26
coll.h
59.6
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2025-06-06 11:26
compactdecimalformat.h
6.88
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2025-06-06 11:26
curramt.h
3.67
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2025-06-06 11:26
currpinf.h
7.3
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2025-06-06 11:26
currunit.h
4.02
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2025-06-06 11:26
datefmt.h
40.7
KB
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2025-06-06 11:26
dbbi.h
1.19
KB
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2025-06-06 11:26
dcfmtsym.h
20.96
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2025-06-06 11:26
decimfmt.h
87.46
KB
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2025-06-06 11:26
displayoptions.h
7.08
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2025-06-06 11:26
docmain.h
7.6
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2025-06-06 11:26
dtfmtsym.h
38.22
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2025-06-06 11:26
dtintrv.h
3.84
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2025-06-06 11:26
dtitvfmt.h
48.87
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2025-06-06 11:26
dtitvinf.h
18.63
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2025-06-06 11:26
dtptngen.h
28.05
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2025-06-06 11:26
dtrule.h
8.66
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2025-06-06 11:26
edits.h
20.74
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2025-06-06 11:26
enumset.h
2.08
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2025-06-06 11:26
errorcode.h
4.84
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2025-06-06 11:26
fieldpos.h
8.69
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2025-06-06 11:26
filteredbrk.h
5.37
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2025-06-06 11:26
fmtable.h
24.37
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2025-06-06 11:26
format.h
12.51
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2025-06-06 11:26
formattednumber.h
6.28
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2025-06-06 11:26
formattedvalue.h
9.75
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2025-06-06 11:26
fpositer.h
3.03
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2025-06-06 11:26
gender.h
3.35
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2025-06-06 11:26
gregocal.h
30.32
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2025-06-06 11:26
icudataver.h
1.02
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2025-06-06 11:26
icuplug.h
12.1
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2025-06-06 11:26
idna.h
12.93
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2025-06-06 11:26
listformatter.h
8.59
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2025-06-06 11:26
localebuilder.h
11.08
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2025-06-06 11:26
localematcher.h
26.86
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2025-06-06 11:26
localpointer.h
19.55
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2025-06-06 11:26
locdspnm.h
7.12
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2025-06-06 11:26
locid.h
48.62
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2025-06-06 11:26
measfmt.h
11.41
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2025-06-06 11:26
measunit.h
111.44
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2025-06-06 11:26
measure.h
4.63
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2025-06-06 11:26
messageformat2.h
21.05
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2025-06-06 11:26
messageformat2_arguments.h
4.49
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2025-06-06 11:26
messageformat2_data_model.h
101.89
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2025-06-06 11:26
messageformat2_data_model_names.h
784
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2025-06-06 11:26
messageformat2_formattable.h
38.36
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2025-06-06 11:26
messageformat2_function_registry.h
18.07
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2025-06-06 11:26
messagepattern.h
33.79
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2025-06-06 11:26
msgfmt.h
44.2
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2025-06-06 11:26
normalizer2.h
34.68
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2025-06-06 11:26
normlzr.h
30.79
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2025-06-06 11:26
nounit.h
2.24
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2025-06-06 11:26
numberformatter.h
90.69
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2025-06-06 11:26
numberrangeformatter.h
26
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2025-06-06 11:26
numfmt.h
50.16
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2025-06-06 11:26
numsys.h
7.22
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2025-06-06 11:26
parseerr.h
3.08
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2025-06-06 11:26
parsepos.h
5.56
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2025-06-06 11:26
platform.h
27.18
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2025-06-06 11:26
plurfmt.h
25.07
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2025-06-06 11:26
plurrule.h
20.63
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2025-06-06 11:26
ptypes.h
2.16
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2025-06-06 11:26
putil.h
6.32
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2025-06-06 11:26
rbbi.h
32.04
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2025-06-06 11:26
rbnf.h
56.16
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2025-06-06 11:26
rbtz.h
15.75
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2025-06-06 11:26
regex.h
84.45
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2025-06-06 11:26
region.h
9.2
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2025-06-06 11:26
reldatefmt.h
22.48
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2025-06-06 11:26
rep.h
9.38
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2025-06-06 11:26
resbund.h
18.02
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2025-06-06 11:26
schriter.h
6.09
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2025-06-06 11:26
scientificnumberformatter.h
6.44
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2025-06-06 11:26
search.h
22.21
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2025-06-06 11:26
selfmt.h
14.35
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2025-06-06 11:26
simpleformatter.h
12.6
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2025-06-06 11:26
simplenumberformatter.h
8.87
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2025-06-06 11:26
simpletz.h
45.62
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2025-06-06 11:26
smpdtfmt.h
57.06
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2025-06-06 11:26
sortkey.h
11.13
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2025-06-06 11:26
std_string.h
1.05
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2025-06-06 11:26
strenum.h
9.96
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2025-06-06 11:26
stringoptions.h
5.79
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2025-06-06 11:26
stringpiece.h
10.28
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2025-06-06 11:26
stringtriebuilder.h
15.53
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2025-06-06 11:26
stsearch.h
21.43
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2025-06-06 11:26
symtable.h
4.28
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2025-06-06 11:26
tblcoll.h
36.96
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2025-06-06 11:26
timezone.h
45.59
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2025-06-06 11:26
tmunit.h
3.4
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2025-06-06 11:26
tmutamt.h
4.9
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2025-06-06 11:26
tmutfmt.h
7.42
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2025-06-06 11:26
translit.h
65.81
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2025-06-06 11:26
tzfmt.h
42.95
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2025-06-06 11:26
tznames.h
16.85
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2025-06-06 11:26
tzrule.h
34.81
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2025-06-06 11:26
tztrans.h
6.11
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2025-06-06 11:26
ubidi.h
89.61
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2025-06-06 11:26
ubiditransform.h
12.71
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2025-06-06 11:26
ubrk.h
24.43
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2025-06-06 11:26
ucal.h
63.96
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2025-06-06 11:26
ucasemap.h
15.27
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2025-06-06 11:26
ucat.h
5.35
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2025-06-06 11:26
uchar.h
151.74
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2025-06-06 11:26
ucharstrie.h
22.59
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2025-06-06 11:26
ucharstriebuilder.h
7.48
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2025-06-06 11:26
uchriter.h
13.24
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2025-06-06 11:26
uclean.h
11.21
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2025-06-06 11:26
ucnv.h
83.34
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2025-06-06 11:26
ucnv_cb.h
6.58
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2025-06-06 11:26
ucnv_err.h
20.98
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2025-06-06 11:26
ucnvsel.h
6.24
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2025-06-06 11:26
ucol.h
67.28
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2025-06-06 11:26
ucoleitr.h
9.82
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2025-06-06 11:26
uconfig.h
12.56
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2025-06-06 11:26
ucpmap.h
5.54
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2025-06-06 11:26
ucptrie.h
22.51
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2025-06-06 11:26
ucsdet.h
14.69
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2025-06-06 11:26
ucurr.h
16.72
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2025-06-06 11:26
udat.h
62.36
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2025-06-06 11:26
udata.h
15.63
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2025-06-06 11:26
udateintervalformat.h
11.93
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2025-06-06 11:26
udatpg.h
30.13
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2025-06-06 11:26
udisplaycontext.h
5.94
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2025-06-06 11:26
udisplayoptions.h
8.86
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2025-06-06 11:26
uenum.h
7.79
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2025-06-06 11:26
ufieldpositer.h
4.41
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2025-06-06 11:26
uformattable.h
10.97
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2025-06-06 11:26
uformattednumber.h
8.09
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2025-06-06 11:26
uformattedvalue.h
12.25
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2025-06-06 11:26
ugender.h
2.06
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2025-06-06 11:26
uidna.h
34.12
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2025-06-06 11:26
uiter.h
22.75
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2025-06-06 11:26
uldnames.h
10.48
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2025-06-06 11:26
ulistformatter.h
10.78
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2025-06-06 11:26
uloc.h
55.38
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2025-06-06 11:26
ulocale.h
6.31
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2025-06-06 11:26
ulocbuilder.h
16.69
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2025-06-06 11:26
ulocdata.h
11.3
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2025-06-06 11:26
umachine.h
14.59
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2025-06-06 11:26
umisc.h
1.34
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2025-06-06 11:26
umsg.h
24.25
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2025-06-06 11:26
umutablecptrie.h
8.3
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2025-06-06 11:26
unifilt.h
4
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2025-06-06 11:26
unifunct.h
4.05
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2025-06-06 11:26
unimatch.h
6.1
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2025-06-06 11:26
unirepl.h
3.38
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2025-06-06 11:26
uniset.h
70.4
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unistr.h
182.08
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unorm.h
20.55
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2025-06-06 11:26
unorm2.h
25.66
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2025-06-06 11:26
unum.h
55.16
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2025-06-06 11:26
unumberformatter.h
19.68
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2025-06-06 11:26
unumberoptions.h
5.23
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2025-06-06 11:26
unumberrangeformatter.h
15.35
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2025-06-06 11:26
unumsys.h
7.26
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2025-06-06 11:26
uobject.h
10.66
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2025-06-06 11:26
upluralrules.h
8.79
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2025-06-06 11:26
uregex.h
71.99
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2025-06-06 11:26
uregion.h
9.81
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2025-06-06 11:26
ureldatefmt.h
16.98
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2025-06-06 11:26
urename.h
141.99
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2025-06-06 11:26
urep.h
5.38
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2025-06-06 11:26
ures.h
36.65
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2025-06-06 11:26
uscript.h
28.51
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2025-06-06 11:26
usearch.h
39.21
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2025-06-06 11:26
uset.h
63.08
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usetiter.h
9.63
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ushape.h
18
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2025-06-06 11:26
usimplenumberformatter.h
7.31
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2025-06-06 11:26
uspoof.h
80
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usprep.h
8.19
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ustdio.h
38.58
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2025-06-06 11:26
ustream.h
1.89
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2025-06-06 11:26
ustring.h
72.16
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2025-06-06 11:26
ustringtrie.h
3.15
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2025-06-06 11:26
utext.h
58.1
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2025-06-06 11:26
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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2025-06-06 11:26
utf_old.h
45.8
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2025-06-06 11:26
utmscale.h
13.78
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utrace.h
17.18
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2025-06-06 11:26
utrans.h
25.54
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2025-06-06 11:26
utypes.h
34.48
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2025-06-06 11:26
uvernum.h
6.33
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2025-06-06 11:26
uversion.h
8.21
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2025-06-06 11:26
vtzone.h
20.68
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2025-06-06 11:26
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 <string_view> #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); #ifndef U_HIDE_INTERNAL_API /** * Converts to a std::string_view(). * @internal */ inline operator std::string_view() const { return {data(), static_cast<std::string_view::size_type>(size())}; } #endif // U_HIDE_INTERNAL_API /** * 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__