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Size
Permission
Date
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alphaindex.h
26.54
KB
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2025-06-05 10:48
appendable.h
8.54
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2025-06-05 10:48
basictz.h
9.99
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2025-06-05 10:48
brkiter.h
27.84
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2025-06-05 10:48
bytestream.h
10.77
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2025-06-05 10:48
bytestrie.h
20.83
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2025-06-05 10:48
bytestriebuilder.h
7.48
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2025-06-05 10:48
calendar.h
107.83
KB
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2025-06-05 10:48
caniter.h
7.53
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2025-06-05 10:48
casemap.h
25.42
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2025-06-05 10:48
char16ptr.h
9.22
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2025-06-05 10:48
chariter.h
23.79
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2025-06-05 10:48
choicfmt.h
23.99
KB
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2025-06-05 10:48
coleitr.h
13.78
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2025-06-05 10:48
coll.h
59.6
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2025-06-05 10:48
compactdecimalformat.h
6.88
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2025-06-05 10:48
curramt.h
3.67
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2025-06-05 10:48
currpinf.h
7.3
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2025-06-05 10:48
currunit.h
4.02
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2025-06-05 10:48
datefmt.h
40.7
KB
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2025-06-05 10:48
dbbi.h
1.19
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2025-06-05 10:48
dcfmtsym.h
20.95
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2025-06-05 10:48
decimfmt.h
87.46
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2025-06-05 10:48
displayoptions.h
7.08
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2025-06-05 10:48
docmain.h
7.6
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2025-06-05 10:48
dtfmtsym.h
38.21
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2025-06-05 10:48
dtintrv.h
3.84
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2025-06-05 10:48
dtitvfmt.h
48.87
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2025-06-05 10:48
dtitvinf.h
18.63
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2025-06-05 10:48
dtptngen.h
28.05
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2025-06-05 10:48
dtrule.h
8.66
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2025-06-05 10:48
edits.h
20.74
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2025-06-05 10:48
enumset.h
2.08
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2025-06-05 10:48
errorcode.h
4.84
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2025-06-05 10:48
fieldpos.h
8.69
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2025-06-05 10:48
filteredbrk.h
5.37
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2025-06-05 10:48
fmtable.h
24.37
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2025-06-05 10:48
format.h
12.5
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2025-06-05 10:48
formattednumber.h
6.28
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2025-06-05 10:48
formattedvalue.h
9.75
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2025-06-05 10:48
fpositer.h
3.03
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2025-06-05 10:48
gender.h
3.35
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2025-06-05 10:48
gregocal.h
30.3
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2025-06-05 10:48
icudataver.h
1.02
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2025-06-05 10:48
icuplug.h
12.1
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2025-06-05 10:48
idna.h
12.93
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2025-06-05 10:48
listformatter.h
8.59
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2025-06-05 10:48
localebuilder.h
11.08
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2025-06-05 10:48
localematcher.h
26.86
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2025-06-05 10:48
localpointer.h
19.55
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2025-06-05 10:48
locdspnm.h
7.12
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2025-06-05 10:48
locid.h
48.4
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2025-06-05 10:48
measfmt.h
11.41
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2025-06-05 10:48
measunit.h
109.16
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2025-06-05 10:48
measure.h
4.63
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2025-06-05 10:48
messageformat2.h
21.01
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2025-06-05 10:48
messageformat2_arguments.h
4.31
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2025-06-05 10:48
messageformat2_data_model.h
101.85
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2025-06-05 10:48
messageformat2_data_model_names.h
784
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2025-06-05 10:48
messageformat2_formattable.h
38.29
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2025-06-05 10:48
messageformat2_function_registry.h
18
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2025-06-05 10:48
messagepattern.h
33.79
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2025-06-05 10:48
msgfmt.h
44.2
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2025-06-05 10:48
normalizer2.h
34.68
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2025-06-05 10:48
normlzr.h
30.79
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2025-06-05 10:48
nounit.h
2.24
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2025-06-05 10:48
numberformatter.h
90.74
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2025-06-05 10:48
numberrangeformatter.h
26.05
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2025-06-05 10:48
numfmt.h
50.16
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2025-06-05 10:48
numsys.h
7.22
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2025-06-05 10:48
parseerr.h
3.08
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2025-06-05 10:48
parsepos.h
5.56
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2025-06-05 10:48
platform.h
27.18
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2025-06-05 10:48
plurfmt.h
25.07
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2025-06-05 10:48
plurrule.h
20.63
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2025-06-05 10:48
ptypes.h
2.16
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2025-06-05 10:48
putil.h
6.32
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2025-06-05 10:48
rbbi.h
32.04
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2025-06-05 10:48
rbnf.h
50.53
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2025-06-05 10:48
rbtz.h
15.75
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2025-06-05 10:48
regex.h
84.45
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2025-06-05 10:48
region.h
9.2
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2025-06-05 10:48
reldatefmt.h
22.48
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2025-06-05 10:48
rep.h
9.38
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2025-06-05 10:48
resbund.h
18.03
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2025-06-05 10:48
schriter.h
6.09
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2025-06-05 10:48
scientificnumberformatter.h
6.44
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2025-06-05 10:48
search.h
22.21
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2025-06-05 10:48
selfmt.h
14.35
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2025-06-05 10:48
simpleformatter.h
12.6
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2025-06-05 10:48
simplenumberformatter.h
8.92
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2025-06-05 10:48
simpletz.h
45.62
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2025-06-05 10:48
smpdtfmt.h
57.06
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2025-06-05 10:48
sortkey.h
11.13
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2025-06-05 10:48
std_string.h
1.05
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2025-06-05 10:48
strenum.h
9.96
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2025-06-05 10:48
stringoptions.h
5.79
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2025-06-05 10:48
stringpiece.h
10.28
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2025-06-05 10:48
stringtriebuilder.h
15.53
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2025-06-05 10:48
stsearch.h
21.43
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2025-06-05 10:48
symtable.h
4.28
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2025-06-05 10:48
tblcoll.h
36.96
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2025-06-05 10:48
timezone.h
45.59
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2025-06-05 10:48
tmunit.h
3.4
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2025-06-05 10:48
tmutamt.h
4.9
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2025-06-05 10:48
tmutfmt.h
7.42
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2025-06-05 10:48
translit.h
65.81
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2025-06-05 10:48
tzfmt.h
42.95
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2025-06-05 10:48
tznames.h
16.85
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tzrule.h
34.81
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2025-06-05 10:48
tztrans.h
6.11
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2025-06-05 10:48
ubidi.h
89.61
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2025-06-05 10:48
ubiditransform.h
12.71
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2025-06-05 10:48
ubrk.h
24.43
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2025-06-05 10:48
ucal.h
63.96
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ucasemap.h
15.27
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ucat.h
5.35
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2025-06-05 10:48
uchar.h
151.87
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2025-06-05 10:48
ucharstrie.h
22.59
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2025-06-05 10:48
ucharstriebuilder.h
7.48
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2025-06-05 10:48
uchriter.h
13.24
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2025-06-05 10:48
uclean.h
11.21
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2025-06-05 10:48
ucnv.h
83.34
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ucnv_cb.h
6.58
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2025-06-05 10:48
ucnv_err.h
20.98
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2025-06-05 10:48
ucnvsel.h
6.24
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2025-06-05 10:48
ucol.h
66.28
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2025-06-05 10:48
ucoleitr.h
9.82
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2025-06-05 10:48
uconfig.h
12.56
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2025-06-05 10:48
ucpmap.h
5.54
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2025-06-05 10:48
ucptrie.h
22.51
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2025-06-05 10:48
ucsdet.h
14.69
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2025-06-05 10:48
ucurr.h
16.72
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2025-06-05 10:48
udat.h
62.36
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2025-06-05 10:48
udata.h
15.63
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2025-06-05 10:48
udateintervalformat.h
11.93
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2025-06-05 10:48
udatpg.h
30.13
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2025-06-05 10:48
udisplaycontext.h
5.94
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udisplayoptions.h
8.86
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2025-06-05 10:48
uenum.h
7.79
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2025-06-05 10:48
ufieldpositer.h
4.41
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2025-06-05 10:48
uformattable.h
10.97
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2025-06-05 10:48
uformattednumber.h
8.09
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2025-06-05 10:48
uformattedvalue.h
12.25
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2025-06-05 10:48
ugender.h
2.06
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uidna.h
34.12
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2025-06-05 10:48
uiter.h
22.75
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2025-06-05 10:48
uldnames.h
10.48
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2025-06-05 10:48
ulistformatter.h
10.78
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2025-06-05 10:48
uloc.h
55.38
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2025-06-05 10:48
ulocale.h
6.31
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2025-06-05 10:48
ulocbuilder.h
16.69
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2025-06-05 10:48
ulocdata.h
11.3
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2025-06-05 10:48
umachine.h
14.59
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umisc.h
1.34
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umsg.h
24.25
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2025-06-05 10:48
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
70.31
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unistr.h
182.08
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unorm.h
20.55
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unorm2.h
25.66
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2025-06-05 10:48
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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2025-06-05 10:48
uregion.h
9.81
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ureldatefmt.h
16.98
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urename.h
141.99
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urep.h
5.38
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ures.h
36.65
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uscript.h
28.51
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usearch.h
39.21
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2025-06-05 10:48
uset.h
62.57
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usetiter.h
9.63
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ushape.h
18
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usimplenumberformatter.h
7.36
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uspoof.h
80
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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
72.16
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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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2025-06-05 10:48
utrans.h
25.54
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utypes.h
34.27
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uvernum.h
6.33
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uversion.h
7.58
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2025-06-05 10:48
vtzone.h
20.68
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2025-06-05 10:48
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__