# !!!!!!! INTERNAL PERL USE ONLY !!!!!!!
# This helper module is for internal use by core Perl only. This module is
# subject to change or removal at any time without notice. Don't use it
# directly. Use the public <charnames> module instead.
package _charnames;
use strict;
use warnings;
use File::Spec;
our $VERSION = '1.28';
use unicore::Name; # mktables-generated algorithmically-defined names
use bytes (); # for $bytes::hint_bits
use re "/aa"; # Everything in here should be ASCII
$Carp::Internal{ (__PACKAGE__) } = 1;
# Translate between Unicode character names and their code points. This is a
# submodule of package <charnames>, used to allow \N{...} to be autoloaded,
# but it was decided not to autoload the various functions in charnames; the
# splitting allows this behavior.
#
# The official names with their code points are stored in a table in
# lib/unicore/Name.pl which is read in as a large string (almost 3/4 Mb in
# Unicode 6.0). Each code point/name combination is separated by a \n in the
# string. (Some of the CJK and the Hangul syllable names are determined
# instead algorithmically via subroutines stored instead in
# lib/unicore/Name.pm). Because of the large size of this table, it isn't
# converted into hashes for faster lookup.
#
# But, user defined aliases are stored in their own hashes, as are Perl
# extensions to the official names. These are checked first before looking at
# the official table.
#
# Basically, the table is grepped for the input code point (viacode()) or
# name (the other functions), and the corresponding value on the same line is
# returned. The grepping is done by turning the input into a regular
# expression. Thus, the same table does double duty, used by both name and
# code point lookup. (If we were to have hashes, we would need two, one for
# each lookup direction.)
#
# For loose name matching, the logical thing would be to have a table
# with all the ignorable characters squeezed out, and then grep it with the
# similiarly-squeezed input name. (And this is in fact how the lookups are
# done with the small Perl extension hashes.) But since we need to be able to
# go from code point to official name, the original table would still need to
# exist. Due to the large size of the table, it was decided to not read
# another very large string into memory for a second table. Instead, the
# regular expression of the input name is modified to have optional spaces and
# dashes between characters. For example, in strict matching, the regular
# expression would be:
# qr/\tDIGIT ONE$/m
# Under loose matching, the blank would be squeezed out, and the re would be:
# qr/\tD[- ]?I[- ]?G[- ]?I[- ]?T[- ]?O[- ]?N[- ]?E$/m
# which matches a blank or dash between any characters in the official table.
#
# This is also how script lookup is done. Basically the re looks like
# qr/ (?:LATIN|GREEK|CYRILLIC) (?:SMALL )?LETTER $name/
# where $name is the loose or strict regex for the remainder of the name.
# The hashes are stored as utf8 strings. This makes it easier to deal with
# sequences. I (khw) also tried making Name.pl utf8, but it slowed things
# down by a factor of 7. I then tried making Name.pl store the ut8
# equivalents but not calling them utf8. That led to similar speed as leaving
# it alone, but since that is harder for a human to parse, I left it as-is.
my %system_aliases = (
# Synonyms for the icky 3.2 names that have parentheses.
'LINE FEED' => pack("U", 0x0A), # LINE FEED (LF)
'FORM FEED' => pack("U", 0x0C), # FORM FEED (FF)
'CARRIAGE RETURN' => pack("U", 0x0D), # CARRIAGE RETURN (CR)
'NEXT LINE' => pack("U", 0x85), # NEXT LINE (NEL)
# Some variant names from Wikipedia
'SINGLE-SHIFT 2' => pack("U", 0x8E),
'SINGLE-SHIFT 3' => pack("U", 0x8F),
'PRIVATE USE 1' => pack("U", 0x91),
'PRIVATE USE 2' => pack("U", 0x92),
'START OF PROTECTED AREA' => pack("U", 0x96),
'END OF PROTECTED AREA' => pack("U", 0x97),
# Convenience. Standard abbreviations for the controls
'NUL' => pack("U", 0x00), # NULL
'SOH' => pack("U", 0x01), # START OF HEADING
'STX' => pack("U", 0x02), # START OF TEXT
'ETX' => pack("U", 0x03), # END OF TEXT
'EOT' => pack("U", 0x04), # END OF TRANSMISSION
'ENQ' => pack("U", 0x05), # ENQUIRY
'ACK' => pack("U", 0x06), # ACKNOWLEDGE
'BEL' => pack("U", 0x07), # ALERT; formerly BELL
'BS' => pack("U", 0x08), # BACKSPACE
'HT' => pack("U", 0x09), # HORIZONTAL TABULATION
'LF' => pack("U", 0x0A), # LINE FEED (LF)
'VT' => pack("U", 0x0B), # VERTICAL TABULATION
'FF' => pack("U", 0x0C), # FORM FEED (FF)
'CR' => pack("U", 0x0D), # CARRIAGE RETURN (CR)
'SO' => pack("U", 0x0E), # SHIFT OUT
'SI' => pack("U", 0x0F), # SHIFT IN
'DLE' => pack("U", 0x10), # DATA LINK ESCAPE
'DC1' => pack("U", 0x11), # DEVICE CONTROL ONE
'DC2' => pack("U", 0x12), # DEVICE CONTROL TWO
'DC3' => pack("U", 0x13), # DEVICE CONTROL THREE
'DC4' => pack("U", 0x14), # DEVICE CONTROL FOUR
'NAK' => pack("U", 0x15), # NEGATIVE ACKNOWLEDGE
'SYN' => pack("U", 0x16), # SYNCHRONOUS IDLE
'ETB' => pack("U", 0x17), # END OF TRANSMISSION BLOCK
'CAN' => pack("U", 0x18), # CANCEL
'EOM' => pack("U", 0x19), # END OF MEDIUM
'SUB' => pack("U", 0x1A), # SUBSTITUTE
'ESC' => pack("U", 0x1B), # ESCAPE
'FS' => pack("U", 0x1C), # FILE SEPARATOR
'GS' => pack("U", 0x1D), # GROUP SEPARATOR
'RS' => pack("U", 0x1E), # RECORD SEPARATOR
'US' => pack("U", 0x1F), # UNIT SEPARATOR
'DEL' => pack("U", 0x7F), # DELETE
'BPH' => pack("U", 0x82), # BREAK PERMITTED HERE
'NBH' => pack("U", 0x83), # NO BREAK HERE
'NEL' => pack("U", 0x85), # NEXT LINE (NEL)
'SSA' => pack("U", 0x86), # START OF SELECTED AREA
'ESA' => pack("U", 0x87), # END OF SELECTED AREA
'HTS' => pack("U", 0x88), # CHARACTER TABULATION SET
'HTJ' => pack("U", 0x89), # CHARACTER TABULATION WITH JUSTIFICATION
'VTS' => pack("U", 0x8A), # LINE TABULATION SET
'PLD' => pack("U", 0x8B), # PARTIAL LINE FORWARD
'PLU' => pack("U", 0x8C), # PARTIAL LINE BACKWARD
'RI' => pack("U", 0x8D), # REVERSE LINE FEED
'SS2' => pack("U", 0x8E), # SINGLE SHIFT TWO
'SS3' => pack("U", 0x8F), # SINGLE SHIFT THREE
'DCS' => pack("U", 0x90), # DEVICE CONTROL STRING
'PU1' => pack("U", 0x91), # PRIVATE USE ONE
'PU2' => pack("U", 0x92), # PRIVATE USE TWO
'STS' => pack("U", 0x93), # SET TRANSMIT STATE
'CCH' => pack("U", 0x94), # CANCEL CHARACTER
'MW' => pack("U", 0x95), # MESSAGE WAITING
'SPA' => pack("U", 0x96), # START OF GUARDED AREA
'EPA' => pack("U", 0x97), # END OF GUARDED AREA
'SOS' => pack("U", 0x98), # START OF STRING
'SCI' => pack("U", 0x9A), # SINGLE CHARACTER INTRODUCER
'CSI' => pack("U", 0x9B), # CONTROL SEQUENCE INTRODUCER
'ST' => pack("U", 0x9C), # STRING TERMINATOR
'OSC' => pack("U", 0x9D), # OPERATING SYSTEM COMMAND
'PM' => pack("U", 0x9E), # PRIVACY MESSAGE
'APC' => pack("U", 0x9F), # APPLICATION PROGRAM COMMAND
# There are no names for these in the Unicode standard; perhaps should be
# deprecated, but then again there are no alternative names, so am not
# deprecating. And if did, the code would have to change to not recommend
# an alternative for these.
'PADDING CHARACTER' => pack("U", 0x80),
'PAD' => pack("U", 0x80),
'HIGH OCTET PRESET' => pack("U", 0x81),
'HOP' => pack("U", 0x81),
'INDEX' => pack("U", 0x84),
'IND' => pack("U", 0x84),
'SINGLE GRAPHIC CHARACTER INTRODUCER' => pack("U", 0x99),
'SGC' => pack("U", 0x99),
# More convenience. For further convenience, it is suggested some way of
# using the NamesList aliases be implemented, but there are ambiguities in
# NamesList.txt
'BOM' => pack("U", 0xFEFF), # BYTE ORDER MARK
'BYTE ORDER MARK'=> pack("U", 0xFEFF),
'CGJ' => pack("U", 0x034F), # COMBINING GRAPHEME JOINER
'FVS1' => pack("U", 0x180B), # MONGOLIAN FREE VARIATION SELECTOR ONE
'FVS2' => pack("U", 0x180C), # MONGOLIAN FREE VARIATION SELECTOR TWO
'FVS3' => pack("U", 0x180D), # MONGOLIAN FREE VARIATION SELECTOR THREE
'LRE' => pack("U", 0x202A), # LEFT-TO-RIGHT EMBEDDING
'LRM' => pack("U", 0x200E), # LEFT-TO-RIGHT MARK
'LRO' => pack("U", 0x202D), # LEFT-TO-RIGHT OVERRIDE
'MMSP' => pack("U", 0x205F), # MEDIUM MATHEMATICAL SPACE
'MVS' => pack("U", 0x180E), # MONGOLIAN VOWEL SEPARATOR
'NBSP' => pack("U", 0x00A0), # NO-BREAK SPACE
'NNBSP' => pack("U", 0x202F), # NARROW NO-BREAK SPACE
'PDF' => pack("U", 0x202C), # POP DIRECTIONAL FORMATTING
'RLE' => pack("U", 0x202B), # RIGHT-TO-LEFT EMBEDDING
'RLM' => pack("U", 0x200F), # RIGHT-TO-LEFT MARK
'RLO' => pack("U", 0x202E), # RIGHT-TO-LEFT OVERRIDE
'SHY' => pack("U", 0x00AD), # SOFT HYPHEN
'VS1' => pack("U", 0xFE00), # VARIATION SELECTOR-1
'VS2' => pack("U", 0xFE01), # VARIATION SELECTOR-2
'VS3' => pack("U", 0xFE02), # VARIATION SELECTOR-3
'VS4' => pack("U", 0xFE03), # VARIATION SELECTOR-4
'VS5' => pack("U", 0xFE04), # VARIATION SELECTOR-5
'VS6' => pack("U", 0xFE05), # VARIATION SELECTOR-6
'VS7' => pack("U", 0xFE06), # VARIATION SELECTOR-7
'VS8' => pack("U", 0xFE07), # VARIATION SELECTOR-8
'VS9' => pack("U", 0xFE08), # VARIATION SELECTOR-9
'VS10' => pack("U", 0xFE09), # VARIATION SELECTOR-10
'VS11' => pack("U", 0xFE0A), # VARIATION SELECTOR-11
'VS12' => pack("U", 0xFE0B), # VARIATION SELECTOR-12
'VS13' => pack("U", 0xFE0C), # VARIATION SELECTOR-13
'VS14' => pack("U", 0xFE0D), # VARIATION SELECTOR-14
'VS15' => pack("U", 0xFE0E), # VARIATION SELECTOR-15
'VS16' => pack("U", 0xFE0F), # VARIATION SELECTOR-16
'VS17' => pack("U", 0xE0100), # VARIATION SELECTOR-17
'VS18' => pack("U", 0xE0101), # VARIATION SELECTOR-18
'VS19' => pack("U", 0xE0102), # VARIATION SELECTOR-19
'VS20' => pack("U", 0xE0103), # VARIATION SELECTOR-20
'VS21' => pack("U", 0xE0104), # VARIATION SELECTOR-21
'VS22' => pack("U", 0xE0105), # VARIATION SELECTOR-22
'VS23' => pack("U", 0xE0106), # VARIATION SELECTOR-23
'VS24' => pack("U", 0xE0107), # VARIATION SELECTOR-24
'VS25' => pack("U", 0xE0108), # VARIATION SELECTOR-25
'VS26' => pack("U", 0xE0109), # VARIATION SELECTOR-26
'VS27' => pack("U", 0xE010A), # VARIATION SELECTOR-27
'VS28' => pack("U", 0xE010B), # VARIATION SELECTOR-28
'VS29' => pack("U", 0xE010C), # VARIATION SELECTOR-29
'VS30' => pack("U", 0xE010D), # VARIATION SELECTOR-30
'VS31' => pack("U", 0xE010E), # VARIATION SELECTOR-31
'VS32' => pack("U", 0xE010F), # VARIATION SELECTOR-32
'VS33' => pack("U", 0xE0110), # VARIATION SELECTOR-33
'VS34' => pack("U", 0xE0111), # VARIATION SELECTOR-34
'VS35' => pack("U", 0xE0112), # VARIATION SELECTOR-35
'VS36' => pack("U", 0xE0113), # VARIATION SELECTOR-36
'VS37' => pack("U", 0xE0114), # VARIATION SELECTOR-37
'VS38' => pack("U", 0xE0115), # VARIATION SELECTOR-38
'VS39' => pack("U", 0xE0116), # VARIATION SELECTOR-39
'VS40' => pack("U", 0xE0117), # VARIATION SELECTOR-40
'VS41' => pack("U", 0xE0118), # VARIATION SELECTOR-41
'VS42' => pack("U", 0xE0119), # VARIATION SELECTOR-42
'VS43' => pack("U", 0xE011A), # VARIATION SELECTOR-43
'VS44' => pack("U", 0xE011B), # VARIATION SELECTOR-44
'VS45' => pack("U", 0xE011C), # VARIATION SELECTOR-45
'VS46' => pack("U", 0xE011D), # VARIATION SELECTOR-46
'VS47' => pack("U", 0xE011E), # VARIATION SELECTOR-47
'VS48' => pack("U", 0xE011F), # VARIATION SELECTOR-48
'VS49' => pack("U", 0xE0120), # VARIATION SELECTOR-49
'VS50' => pack("U", 0xE0121), # VARIATION SELECTOR-50
'VS51' => pack("U", 0xE0122), # VARIATION SELECTOR-51
'VS52' => pack("U", 0xE0123), # VARIATION SELECTOR-52
'VS53' => pack("U", 0xE0124), # VARIATION SELECTOR-53
'VS54' => pack("U", 0xE0125), # VARIATION SELECTOR-54
'VS55' => pack("U", 0xE0126), # VARIATION SELECTOR-55
'VS56' => pack("U", 0xE0127), # VARIATION SELECTOR-56
'VS57' => pack("U", 0xE0128), # VARIATION SELECTOR-57
'VS58' => pack("U", 0xE0129), # VARIATION SELECTOR-58
'VS59' => pack("U", 0xE012A), # VARIATION SELECTOR-59
'VS60' => pack("U", 0xE012B), # VARIATION SELECTOR-60
'VS61' => pack("U", 0xE012C), # VARIATION SELECTOR-61
'VS62' => pack("U", 0xE012D), # VARIATION SELECTOR-62
'VS63' => pack("U", 0xE012E), # VARIATION SELECTOR-63
'VS64' => pack("U", 0xE012F), # VARIATION SELECTOR-64
'VS65' => pack("U", 0xE0130), # VARIATION SELECTOR-65
'VS66' => pack("U", 0xE0131), # VARIATION SELECTOR-66
'VS67' => pack("U", 0xE0132), # VARIATION SELECTOR-67
'VS68' => pack("U", 0xE0133), # VARIATION SELECTOR-68
'VS69' => pack("U", 0xE0134), # VARIATION SELECTOR-69
'VS70' => pack("U", 0xE0135), # VARIATION SELECTOR-70
'VS71' => pack("U", 0xE0136), # VARIATION SELECTOR-71
'VS72' => pack("U", 0xE0137), # VARIATION SELECTOR-72
'VS73' => pack("U", 0xE0138), # VARIATION SELECTOR-73
'VS74' => pack("U", 0xE0139), # VARIATION SELECTOR-74
'VS75' => pack("U", 0xE013A), # VARIATION SELECTOR-75
'VS76' => pack("U", 0xE013B), # VARIATION SELECTOR-76
'VS77' => pack("U", 0xE013C), # VARIATION SELECTOR-77
'VS78' => pack("U", 0xE013D), # VARIATION SELECTOR-78
'VS79' => pack("U", 0xE013E), # VARIATION SELECTOR-79
'VS80' => pack("U", 0xE013F), # VARIATION SELECTOR-80
'VS81' => pack("U", 0xE0140), # VARIATION SELECTOR-81
'VS82' => pack("U", 0xE0141), # VARIATION SELECTOR-82
'VS83' => pack("U", 0xE0142), # VARIATION SELECTOR-83
'VS84' => pack("U", 0xE0143), # VARIATION SELECTOR-84
'VS85' => pack("U", 0xE0144), # VARIATION SELECTOR-85
'VS86' => pack("U", 0xE0145), # VARIATION SELECTOR-86
'VS87' => pack("U", 0xE0146), # VARIATION SELECTOR-87
'VS88' => pack("U", 0xE0147), # VARIATION SELECTOR-88
'VS89' => pack("U", 0xE0148), # VARIATION SELECTOR-89
'VS90' => pack("U", 0xE0149), # VARIATION SELECTOR-90
'VS91' => pack("U", 0xE014A), # VARIATION SELECTOR-91
'VS92' => pack("U", 0xE014B), # VARIATION SELECTOR-92
'VS93' => pack("U", 0xE014C), # VARIATION SELECTOR-93
'VS94' => pack("U", 0xE014D), # VARIATION SELECTOR-94
'VS95' => pack("U", 0xE014E), # VARIATION SELECTOR-95
'VS96' => pack("U", 0xE014F), # VARIATION SELECTOR-96
'VS97' => pack("U", 0xE0150), # VARIATION SELECTOR-97
'VS98' => pack("U", 0xE0151), # VARIATION SELECTOR-98
'VS99' => pack("U", 0xE0152), # VARIATION SELECTOR-99
'VS100' => pack("U", 0xE0153), # VARIATION SELECTOR-100
'VS101' => pack("U", 0xE0154), # VARIATION SELECTOR-101
'VS102' => pack("U", 0xE0155), # VARIATION SELECTOR-102
'VS103' => pack("U", 0xE0156), # VARIATION SELECTOR-103
'VS104' => pack("U", 0xE0157), # VARIATION SELECTOR-104
'VS105' => pack("U", 0xE0158), # VARIATION SELECTOR-105
'VS106' => pack("U", 0xE0159), # VARIATION SELECTOR-106
'VS107' => pack("U", 0xE015A), # VARIATION SELECTOR-107
'VS108' => pack("U", 0xE015B), # VARIATION SELECTOR-108
'VS109' => pack("U", 0xE015C), # VARIATION SELECTOR-109
'VS110' => pack("U", 0xE015D), # VARIATION SELECTOR-110
'VS111' => pack("U", 0xE015E), # VARIATION SELECTOR-111
'VS112' => pack("U", 0xE015F), # VARIATION SELECTOR-112
'VS113' => pack("U", 0xE0160), # VARIATION SELECTOR-113
'VS114' => pack("U", 0xE0161), # VARIATION SELECTOR-114
'VS115' => pack("U", 0xE0162), # VARIATION SELECTOR-115
'VS116' => pack("U", 0xE0163), # VARIATION SELECTOR-116
'VS117' => pack("U", 0xE0164), # VARIATION SELECTOR-117
'VS118' => pack("U", 0xE0165), # VARIATION SELECTOR-118
'VS119' => pack("U", 0xE0166), # VARIATION SELECTOR-119
'VS120' => pack("U", 0xE0167), # VARIATION SELECTOR-120
'VS121' => pack("U", 0xE0168), # VARIATION SELECTOR-121
'VS122' => pack("U", 0xE0169), # VARIATION SELECTOR-122
'VS123' => pack("U", 0xE016A), # VARIATION SELECTOR-123
'VS124' => pack("U", 0xE016B), # VARIATION SELECTOR-124
'VS125' => pack("U", 0xE016C), # VARIATION SELECTOR-125
'VS126' => pack("U", 0xE016D), # VARIATION SELECTOR-126
'VS127' => pack("U", 0xE016E), # VARIATION SELECTOR-127
'VS128' => pack("U", 0xE016F), # VARIATION SELECTOR-128
'VS129' => pack("U", 0xE0170), # VARIATION SELECTOR-129
'VS130' => pack("U", 0xE0171), # VARIATION SELECTOR-130
'VS131' => pack("U", 0xE0172), # VARIATION SELECTOR-131
'VS132' => pack("U", 0xE0173), # VARIATION SELECTOR-132
'VS133' => pack("U", 0xE0174), # VARIATION SELECTOR-133
'VS134' => pack("U", 0xE0175), # VARIATION SELECTOR-134
'VS135' => pack("U", 0xE0176), # VARIATION SELECTOR-135
'VS136' => pack("U", 0xE0177), # VARIATION SELECTOR-136
'VS137' => pack("U", 0xE0178), # VARIATION SELECTOR-137
'VS138' => pack("U", 0xE0179), # VARIATION SELECTOR-138
'VS139' => pack("U", 0xE017A), # VARIATION SELECTOR-139
'VS140' => pack("U", 0xE017B), # VARIATION SELECTOR-140
'VS141' => pack("U", 0xE017C), # VARIATION SELECTOR-141
'VS142' => pack("U", 0xE017D), # VARIATION SELECTOR-142
'VS143' => pack("U", 0xE017E), # VARIATION SELECTOR-143
'VS144' => pack("U", 0xE017F), # VARIATION SELECTOR-144
'VS145' => pack("U", 0xE0180), # VARIATION SELECTOR-145
'VS146' => pack("U", 0xE0181), # VARIATION SELECTOR-146
'VS147' => pack("U", 0xE0182), # VARIATION SELECTOR-147
'VS148' => pack("U", 0xE0183), # VARIATION SELECTOR-148
'VS149' => pack("U", 0xE0184), # VARIATION SELECTOR-149
'VS150' => pack("U", 0xE0185), # VARIATION SELECTOR-150
'VS151' => pack("U", 0xE0186), # VARIATION SELECTOR-151
'VS152' => pack("U", 0xE0187), # VARIATION SELECTOR-152
'VS153' => pack("U", 0xE0188), # VARIATION SELECTOR-153
'VS154' => pack("U", 0xE0189), # VARIATION SELECTOR-154
'VS155' => pack("U", 0xE018A), # VARIATION SELECTOR-155
'VS156' => pack("U", 0xE018B), # VARIATION SELECTOR-156
'VS157' => pack("U", 0xE018C), # VARIATION SELECTOR-157
'VS158' => pack("U", 0xE018D), # VARIATION SELECTOR-158
'VS159' => pack("U", 0xE018E), # VARIATION SELECTOR-159
'VS160' => pack("U", 0xE018F), # VARIATION SELECTOR-160
'VS161' => pack("U", 0xE0190), # VARIATION SELECTOR-161
'VS162' => pack("U", 0xE0191), # VARIATION SELECTOR-162
'VS163' => pack("U", 0xE0192), # VARIATION SELECTOR-163
'VS164' => pack("U", 0xE0193), # VARIATION SELECTOR-164
'VS165' => pack("U", 0xE0194), # VARIATION SELECTOR-165
'VS166' => pack("U", 0xE0195), # VARIATION SELECTOR-166
'VS167' => pack("U", 0xE0196), # VARIATION SELECTOR-167
'VS168' => pack("U", 0xE0197), # VARIATION SELECTOR-168
'VS169' => pack("U", 0xE0198), # VARIATION SELECTOR-169
'VS170' => pack("U", 0xE0199), # VARIATION SELECTOR-170
'VS171' => pack("U", 0xE019A), # VARIATION SELECTOR-171
'VS172' => pack("U", 0xE019B), # VARIATION SELECTOR-172
'VS173' => pack("U", 0xE019C), # VARIATION SELECTOR-173
'VS174' => pack("U", 0xE019D), # VARIATION SELECTOR-174
'VS175' => pack("U", 0xE019E), # VARIATION SELECTOR-175
'VS176' => pack("U", 0xE019F), # VARIATION SELECTOR-176
'VS177' => pack("U", 0xE01A0), # VARIATION SELECTOR-177
'VS178' => pack("U", 0xE01A1), # VARIATION SELECTOR-178
'VS179' => pack("U", 0xE01A2), # VARIATION SELECTOR-179
'VS180' => pack("U", 0xE01A3), # VARIATION SELECTOR-180
'VS181' => pack("U", 0xE01A4), # VARIATION SELECTOR-181
'VS182' => pack("U", 0xE01A5), # VARIATION SELECTOR-182
'VS183' => pack("U", 0xE01A6), # VARIATION SELECTOR-183
'VS184' => pack("U", 0xE01A7), # VARIATION SELECTOR-184
'VS185' => pack("U", 0xE01A8), # VARIATION SELECTOR-185
'VS186' => pack("U", 0xE01A9), # VARIATION SELECTOR-186
'VS187' => pack("U", 0xE01AA), # VARIATION SELECTOR-187
'VS188' => pack("U", 0xE01AB), # VARIATION SELECTOR-188
'VS189' => pack("U", 0xE01AC), # VARIATION SELECTOR-189
'VS190' => pack("U", 0xE01AD), # VARIATION SELECTOR-190
'VS191' => pack("U", 0xE01AE), # VARIATION SELECTOR-191
'VS192' => pack("U", 0xE01AF), # VARIATION SELECTOR-192
'VS193' => pack("U", 0xE01B0), # VARIATION SELECTOR-193
'VS194' => pack("U", 0xE01B1), # VARIATION SELECTOR-194
'VS195' => pack("U", 0xE01B2), # VARIATION SELECTOR-195
'VS196' => pack("U", 0xE01B3), # VARIATION SELECTOR-196
'VS197' => pack("U", 0xE01B4), # VARIATION SELECTOR-197
'VS198' => pack("U", 0xE01B5), # VARIATION SELECTOR-198
'VS199' => pack("U", 0xE01B6), # VARIATION SELECTOR-199
'VS200' => pack("U", 0xE01B7), # VARIATION SELECTOR-200
'VS201' => pack("U", 0xE01B8), # VARIATION SELECTOR-201
'VS202' => pack("U", 0xE01B9), # VARIATION SELECTOR-202
'VS203' => pack("U", 0xE01BA), # VARIATION SELECTOR-203
'VS204' => pack("U", 0xE01BB), # VARIATION SELECTOR-204
'VS205' => pack("U", 0xE01BC), # VARIATION SELECTOR-205
'VS206' => pack("U", 0xE01BD), # VARIATION SELECTOR-206
'VS207' => pack("U", 0xE01BE), # VARIATION SELECTOR-207
'VS208' => pack("U", 0xE01BF), # VARIATION SELECTOR-208
'VS209' => pack("U", 0xE01C0), # VARIATION SELECTOR-209
'VS210' => pack("U", 0xE01C1), # VARIATION SELECTOR-210
'VS211' => pack("U", 0xE01C2), # VARIATION SELECTOR-211
'VS212' => pack("U", 0xE01C3), # VARIATION SELECTOR-212
'VS213' => pack("U", 0xE01C4), # VARIATION SELECTOR-213
'VS214' => pack("U", 0xE01C5), # VARIATION SELECTOR-214
'VS215' => pack("U", 0xE01C6), # VARIATION SELECTOR-215
'VS216' => pack("U", 0xE01C7), # VARIATION SELECTOR-216
'VS217' => pack("U", 0xE01C8), # VARIATION SELECTOR-217
'VS218' => pack("U", 0xE01C9), # VARIATION SELECTOR-218
'VS219' => pack("U", 0xE01CA), # VARIATION SELECTOR-219
'VS220' => pack("U", 0xE01CB), # VARIATION SELECTOR-220
'VS221' => pack("U", 0xE01CC), # VARIATION SELECTOR-221
'VS222' => pack("U", 0xE01CD), # VARIATION SELECTOR-222
'VS223' => pack("U", 0xE01CE), # VARIATION SELECTOR-223
'VS224' => pack("U", 0xE01CF), # VARIATION SELECTOR-224
'VS225' => pack("U", 0xE01D0), # VARIATION SELECTOR-225
'VS226' => pack("U", 0xE01D1), # VARIATION SELECTOR-226
'VS227' => pack("U", 0xE01D2), # VARIATION SELECTOR-227
'VS228' => pack("U", 0xE01D3), # VARIATION SELECTOR-228
'VS229' => pack("U", 0xE01D4), # VARIATION SELECTOR-229
'VS230' => pack("U", 0xE01D5), # VARIATION SELECTOR-230
'VS231' => pack("U", 0xE01D6), # VARIATION SELECTOR-231
'VS232' => pack("U", 0xE01D7), # VARIATION SELECTOR-232
'VS233' => pack("U", 0xE01D8), # VARIATION SELECTOR-233
'VS234' => pack("U", 0xE01D9), # VARIATION SELECTOR-234
'VS235' => pack("U", 0xE01DA), # VARIATION SELECTOR-235
'VS236' => pack("U", 0xE01DB), # VARIATION SELECTOR-236
'VS237' => pack("U", 0xE01DC), # VARIATION SELECTOR-237
'VS238' => pack("U", 0xE01DD), # VARIATION SELECTOR-238
'VS239' => pack("U", 0xE01DE), # VARIATION SELECTOR-239
'VS240' => pack("U", 0xE01DF), # VARIATION SELECTOR-240
'VS241' => pack("U", 0xE01E0), # VARIATION SELECTOR-241
'VS242' => pack("U", 0xE01E1), # VARIATION SELECTOR-242
'VS243' => pack("U", 0xE01E2), # VARIATION SELECTOR-243
'VS244' => pack("U", 0xE01E3), # VARIATION SELECTOR-244
'VS245' => pack("U", 0xE01E4), # VARIATION SELECTOR-245
'VS246' => pack("U", 0xE01E5), # VARIATION SELECTOR-246
'VS247' => pack("U", 0xE01E6), # VARIATION SELECTOR-247
'VS248' => pack("U", 0xE01E7), # VARIATION SELECTOR-248
'VS249' => pack("U", 0xE01E8), # VARIATION SELECTOR-249
'VS250' => pack("U", 0xE01E9), # VARIATION SELECTOR-250
'VS251' => pack("U", 0xE01EA), # VARIATION SELECTOR-251
'VS252' => pack("U", 0xE01EB), # VARIATION SELECTOR-252
'VS253' => pack("U", 0xE01EC), # VARIATION SELECTOR-253
'VS254' => pack("U", 0xE01ED), # VARIATION SELECTOR-254
'VS255' => pack("U", 0xE01EE), # VARIATION SELECTOR-255
'VS256' => pack("U", 0xE01EF), # VARIATION SELECTOR-256
'WJ' => pack("U", 0x2060), # WORD JOINER
'ZWJ' => pack("U", 0x200D), # ZERO WIDTH JOINER
'ZWNJ' => pack("U", 0x200C), # ZERO WIDTH NON-JOINER
'ZWSP' => pack("U", 0x200B), # ZERO WIDTH SPACE
);
# These are the aliases above that differ under :loose and :full matching
# because the :full versions have blanks or hyphens in them.
my %loose_system_aliases = (
'LINEFEED' => pack("U", 0x0A),
'FORMFEED' => pack("U", 0x0C),
'CARRIAGERETURN' => pack("U", 0x0D),
'NEXTLINE' => pack("U", 0x85),
'SINGLESHIFT2' => pack("U", 0x8E),
'SINGLESHIFT3' => pack("U", 0x8F),
'PRIVATEUSE1' => pack("U", 0x91),
'PRIVATEUSE2' => pack("U", 0x92),
'STARTOFPROTECTEDAREA' => pack("U", 0x96),
'ENDOFPROTECTEDAREA' => pack("U", 0x97),
'PADDINGCHARACTER' => pack("U", 0x80),
'HIGHOCTETPRESET' => pack("U", 0x81),
'SINGLEGRAPHICCHARACTERINTRODUCER' => pack("U", 0x99),
'BYTEORDERMARK' => pack("U", 0xFEFF),
);
my %deprecated_aliases = (
# Pre-3.2 compatibility (only for the first 256 characters).
# Use of these gives deprecated message.
'HORIZONTAL TABULATION' => pack("U", 0x09), # CHARACTER TABULATION
'VERTICAL TABULATION' => pack("U", 0x0B), # LINE TABULATION
'FILE SEPARATOR' => pack("U", 0x1C), # INFORMATION SEPARATOR FOUR
'GROUP SEPARATOR' => pack("U", 0x1D), # INFORMATION SEPARATOR THREE
'RECORD SEPARATOR' => pack("U", 0x1E), # INFORMATION SEPARATOR TWO
'UNIT SEPARATOR' => pack("U", 0x1F), # INFORMATION SEPARATOR ONE
'HORIZONTAL TABULATION SET' => pack("U", 0x88), # CHARACTER TABULATION SET
'HORIZONTAL TABULATION WITH JUSTIFICATION' => pack("U", 0x89), # CHARACTER TABULATION WITH JUSTIFICATION
'PARTIAL LINE DOWN' => pack("U", 0x8B), # PARTIAL LINE FORWARD
'PARTIAL LINE UP' => pack("U", 0x8C), # PARTIAL LINE BACKWARD
'VERTICAL TABULATION SET' => pack("U", 0x8A), # LINE TABULATION SET
'REVERSE INDEX' => pack("U", 0x8D), # REVERSE LINE FEED
# Unicode 6.0 co-opted this for U+1F514, so deprecate it for now.
'BELL' => pack("U", 0x07),
);
my %loose_deprecated_aliases = (
'HORIZONTALTABULATION' => pack("U", 0x09),
'VERTICALTABULATION' => pack("U", 0x0B),
'FILESEPARATOR' => pack("U", 0x1C),
'GROUPSEPARATOR' => pack("U", 0x1D),
'RECORDSEPARATOR' => pack("U", 0x1E),
'UNITSEPARATOR' => pack("U", 0x1F),
'HORIZONTALTABULATIONSET' => pack("U", 0x88),
'HORIZONTALTABULATIONWITHJUSTIFICATION' => pack("U", 0x89),
'PARTIALLINEDOWN' => pack("U", 0x8B),
'PARTIALLINEUP' => pack("U", 0x8C),
'VERTICALTABULATIONSET' => pack("U", 0x8A),
'REVERSEINDEX' => pack("U", 0x8D),
);
# These are special cased in :loose matching, differing only in a medial
# hyphen
my $HANGUL_JUNGSEONG_O_E_utf8 = pack("U", 0x1180);
my $HANGUL_JUNGSEONG_OE_utf8 = pack("U", 0x116C);
my $txt; # The table of official character names
my %full_names_cache; # Holds already-looked-up names, so don't have to
# re-look them up again. The previous versions of charnames had scoping
# bugs. For example if we use script A in one scope and find and cache
# what Z resolves to, we can't use that cache in a different scope that
# uses script B instead of A, as Z might be an entirely different letter
# there; or there might be different aliases in effect in different
# scopes, or :short may be in effect or not effect in different scopes,
# or various combinations thereof. This was solved in this version
# mostly by moving things to %^H. But some things couldn't be moved
# there. One of them was the cache of runtime looked-up names, in part
# because %^H is read-only at runtime. I (khw) don't know why the cache
# was run-time only in the previous versions: perhaps oversight; perhaps
# that compile time looking doesn't happen in a loop so didn't think it
# was worthwhile; perhaps not wanting to make the cache too large. But
# I decided to make it compile time as well; this could easily be
# changed.
# Anyway, this hash is not scoped, and is added to at runtime. It
# doesn't have scoping problems because the data in it is restricted to
# official names, which are always invariant, and we only set it and
# look at it at during :full lookups, so is unaffected by any other
# scoped options. I put this in to maintain parity with the older
# version. If desired, a %short_names cache could also be made, as well
# as one for each script, say in %script_names_cache, with each key
# being a hash for a script named in a 'use charnames' statement. I
# decided not to do that for now, just because it's added complication,
# and because I'm just trying to maintain parity, not extend it.
# Like %full_names_cache, but for use when :loose is in effect. There needs
# to be two caches because :loose may not be in effect for a scope, and a
# loose name could inappropriately be returned when only exact matching is
# called for.
my %loose_names_cache;
# Designed so that test decimal first, and then hex. Leading zeros
# imply non-decimal, as do non-[0-9]
my $decimal_qr = qr/^[1-9]\d*$/;
# Returns the hex number in $1.
my $hex_qr = qr/^(?:[Uu]\+|0[xX])?([[:xdigit:]]+)$/;
sub croak
{
require Carp; goto &Carp::croak;
} # croak
sub carp
{
require Carp; goto &Carp::carp;
} # carp
sub alias (@) # Set up a single alias
{
my $alias = ref $_[0] ? $_[0] : { @_ };
foreach my $name (keys %$alias) {
my $value = $alias->{$name};
next unless defined $value; # Omit if screwed up.
# Is slightly slower to just after this statement see if it is
# decimal, since we already know it is after having converted from
# hex, but makes the code easier to maintain, and is called
# infrequently, only at compile-time
if ($value !~ $decimal_qr && $value =~ $hex_qr) {
$value = CORE::hex $1;
}
if ($value =~ $decimal_qr) {
no warnings qw(non_unicode surrogate nonchar); # Allow any non-malformed
$^H{charnames_ord_aliases}{$name} = pack("U", $value);
# Use a canonical form.
$^H{charnames_inverse_ords}{sprintf("%05X", $value)} = $name;
}
else {
# XXX validate syntax when deprecation cycle complete. ie. start
# with an alpha only, etc.
$^H{charnames_name_aliases}{$name} = $value;
}
}
} # alias
sub not_legal_use_bytes_msg {
my ($name, $utf8) = @_;
my $return;
if (length($utf8) == 1) {
$return = sprintf("Character 0x%04x with name '%s' is", ord $utf8, $name);
} else {
$return = sprintf("String with name '%s' (and ordinals %s) contains character(s)", $name, join(" ", map { sprintf "0x%04X", ord $_ } split(//, $utf8)));
}
return $return . " above 0xFF with 'use bytes' in effect";
}
sub alias_file ($) # Reads a file containing alias definitions
{
my ($arg, $file) = @_;
if (-f $arg && File::Spec->file_name_is_absolute ($arg)) {
$file = $arg;
}
elsif ($arg =~ m/^\w+$/) {
$file = "unicore/${arg}_alias.pl";
}
else {
croak "Charnames alias files can only have identifier characters";
}
if (my @alias = do $file) {
@alias == 1 && !defined $alias[0] and
croak "$file cannot be used as alias file for charnames";
@alias % 2 and
croak "$file did not return a (valid) list of alias pairs";
alias (@alias);
return (1);
}
0;
} # alias_file
# For use when don't import anything. This structure must be kept in
# sync with the one that import() fills up.
my %dummy_H = (
charnames_stringified_names => "",
charnames_stringified_ords => "",
charnames_scripts => "",
charnames_full => 1,
charnames_loose => 0,
charnames_short => 0,
);
sub lookup_name ($$$) {
my ($name, $wants_ord, $runtime) = @_;
# Lookup the name or sequence $name in the tables. If $wants_ord is false,
# returns the string equivalent of $name; if true, returns the ordinal value
# instead, but in this case $name must not be a sequence; otherwise undef is
# returned and a warning raised. $runtime is 0 if compiletime, otherwise
# gives the number of stack frames to go back to get the application caller
# info.
# If $name is not found, returns undef in runtime with no warning; and in
# compiletime, the Unicode replacement character, with a warning.
# It looks first in the aliases, then in the large table of official Unicode
# names.
my $utf8; # The string result
my $save_input;
if ($runtime) {
my $hints_ref = (caller($runtime))[10];
# If we didn't import anything (which happens with 'use charnames ()',
# substitute a dummy structure.
$hints_ref = \%dummy_H if ! defined $hints_ref
|| (! defined $hints_ref->{charnames_full}
&& ! defined $hints_ref->{charnames_loose});
# At runtime, but currently not at compile time, $^H gets
# stringified, so un-stringify back to the original data structures.
# These get thrown away by perl before the next invocation
# Also fill in the hash with the non-stringified data.
# N.B. New fields must be also added to %dummy_H
%{$^H{charnames_name_aliases}} = split ',',
$hints_ref->{charnames_stringified_names};
%{$^H{charnames_ord_aliases}} = split ',',
$hints_ref->{charnames_stringified_ords};
$^H{charnames_scripts} = $hints_ref->{charnames_scripts};
$^H{charnames_full} = $hints_ref->{charnames_full};
$^H{charnames_loose} = $hints_ref->{charnames_loose};
$^H{charnames_short} = $hints_ref->{charnames_short};
}
my $loose = $^H{charnames_loose};
my $lookup_name; # Input name suitably modified for grepping for in the
# table
# User alias should be checked first or else can't override ours, and if we
# were to add any, could conflict with theirs.
if (exists $^H{charnames_ord_aliases}{$name}) {
$utf8 = $^H{charnames_ord_aliases}{$name};
}
elsif (exists $^H{charnames_name_aliases}{$name}) {
$name = $^H{charnames_name_aliases}{$name};
$save_input = $lookup_name = $name; # Cache the result for any error
# message
# The aliases are documented to not match loosely, so change loose match
# into full.
if ($loose) {
$loose = 0;
$^H{charnames_full} = 1;
}
}
else {
# Here, not a user alias. That means that loose matching may be in
# effect; will have to modify the input name.
$lookup_name = $name;
if ($loose) {
$lookup_name = uc $lookup_name;
# Squeeze out all underscores
$lookup_name =~ s/_//g;
# Remove all medial hyphens
$lookup_name =~ s/ (?<= \S ) - (?= \S )//gx;
# Squeeze out all spaces
$lookup_name =~ s/\s//g;
}
# Here, $lookup_name has been modified as necessary for looking in the
# hashes. Check the system alias files next. Most of these aliases are
# the same for both strict and loose matching. To save space, the ones
# which differ are in their own separate hash, which is checked if loose
# matching is selected and the regular match fails. To save time, the
# loose hashes could be expanded to include all aliases, and there would
# only have to be one check. But if someone specifies :loose, they are
# interested in convenience over speed, and the time for this second check
# is miniscule compared to the rest of the routine.
if (exists $system_aliases{$lookup_name}) {
$utf8 = $system_aliases{$lookup_name};
}
elsif ($loose && exists $loose_system_aliases{$lookup_name}) {
$utf8 = $loose_system_aliases{$lookup_name};
}
elsif (exists $deprecated_aliases{$lookup_name}) {
require warnings;
warnings::warnif('deprecated',
"Unicode character name \"$name\" is deprecated, use \""
. viacode(ord $deprecated_aliases{$lookup_name})
. "\" instead");
$utf8 = $deprecated_aliases{$lookup_name};
}
elsif ($loose && exists $loose_deprecated_aliases{$lookup_name}) {
require warnings;
warnings::warnif('deprecated',
"Unicode character name \"$name\" is deprecated, use \""
. viacode(ord $loose_deprecated_aliases{$lookup_name})
. "\" instead");
$utf8 = $loose_deprecated_aliases{$lookup_name};
}
}
my @off; # Offsets into table of pattern match begin and end
# If haven't found it yet...
if (! defined $utf8) {
# See if has looked this input up earlier.
if (! $loose && $^H{charnames_full} && exists $full_names_cache{$name}) {
$utf8 = $full_names_cache{$name};
}
elsif ($loose && exists $loose_names_cache{$name}) {
$utf8 = $loose_names_cache{$name};
}
else { # Here, must do a look-up
# If full or loose matching succeeded, points to where to cache the
# result
my $cache_ref;
## Suck in the code/name list as a big string.
## Lines look like:
## "00052\tLATIN CAPITAL LETTER R\n"
# or
# "0052 0303\tLATIN CAPITAL LETTER R WITH TILDE\n"
$txt = do "unicore/Name.pl" unless $txt;
## @off will hold the index into the code/name string of the start and
## end of the name as we find it.
## If :loose, look for a loose match; if :full, look for the name
## exactly
# First, see if the name is one which is algorithmically determinable.
# The subroutine is included in Name.pl. The table contained in
# $txt doesn't contain these. Experiments show that checking
# for these before checking for the regular names has no
# noticeable impact on performance for the regular names, but
# the other way around slows down finding these immensely.
# Algorithmically determinables are not placed in the cache because
# that uses up memory, and finding these again is fast.
if (($loose || $^H{charnames_full})
&& (defined (my $ord = charnames::name_to_code_point_special($lookup_name, $loose))))
{
$utf8 = pack("U", $ord);
}
else {
# Not algorithmically determinable; look up in the table. The name
# will be turned into a regex, so quote any meta characters.
$lookup_name = quotemeta $lookup_name;
if ($loose) {
# For loose matches, $lookup_name has already squeezed out the
# non-essential characters. We have to add in code to make the
# squeezed version match the non-squeezed equivalent in the table.
# The only remaining hyphens are ones that start or end a word in
# the original. They have been quoted in $lookup_name so they look
# like "\-". Change all other characters except the backslash
# quotes for any metacharacters, and the final character, so that
# e.g., COLON gets transformed into: /C[- ]?O[- ]?L[- ]?O[- ]?N/
$lookup_name =~ s/ (?! \\ -) # Don't do this to the \- sequence
( [^-\\] ) # Nor the "-" within that sequence,
# nor the "\" that quotes metachars,
# but otherwise put the char into $1
(?=.) # And don't do it for the final char
/$1\[- \]?/gx; # And add an optional blank or
# '-' after each $1 char
# Those remaining hyphens were originally at the beginning or end of
# a word, so they can match either a blank before or after, but not
# both. (Keep in mind that they have been quoted, so are a '\-'
# sequence)
$lookup_name =~ s/\\ -/(?:- | -)/xg;
}
# Do the lookup in the full table if asked for, and if succeeds
# save the offsets and set where to cache the result.
if (($loose || $^H{charnames_full}) && $txt =~ /\t$lookup_name$/m) {
@off = ($-[0] + 1, $+[0]); # The 1 is for the tab
$cache_ref = ($loose) ? \%loose_names_cache : \%full_names_cache;
}
else {
# Here, didn't look for, or didn't find the name.
# If :short is allowed, see if input is like "greek:Sigma".
# Keep in mind that $lookup_name has had the metas quoted.
my $scripts_trie = "";
my $name_has_uppercase;
if (($^H{charnames_short})
&& $lookup_name =~ /^ (?: \\ \s)* # Quoted space
(.+?) # $1 = the script
(?: \\ \s)*
\\ : # Quoted colon
(?: \\ \s)*
(.+?) # $2 = the name
(?: \\ \s)* $
/xs)
{
# Even in non-loose matching, the script traditionally has been
# case insensitve
$scripts_trie = "\U$1";
$lookup_name = $2;
# Use original name to find its input casing, but ignore the
# script part of that to make the determination.
$save_input = $name if ! defined $save_input;
$name =~ s/.*?://;
$name_has_uppercase = $name =~ /[[:upper:]]/;
}
else { # Otherwise look in allowed scripts
$scripts_trie = $^H{charnames_scripts};
# Use original name to find its input casing
$name_has_uppercase = $name =~ /[[:upper:]]/;
}
my $case = $name_has_uppercase ? "CAPITAL" : "SMALL";
if (! $scripts_trie
|| $txt !~
/\t (?: $scripts_trie ) \ (?:$case\ )? LETTER \ \U$lookup_name $/xm)
{
# Here we still don't have it, give up.
return if $runtime;
# May have zapped input name, get it again.
$name = (defined $save_input) ? $save_input : $_[0];
carp "Unknown charname '$name'";
return ($wants_ord) ? 0xFFFD : pack("U", 0xFFFD);
}
# Here have found the input name in the table.
@off = ($-[0] + 1, $+[0]); # The 1 is for the tab
}
# Here, the input name has been found; we haven't set up the output,
# but we know where in the string
# the name starts. The string is set up so that for single characters
# (and not named sequences), the name is preceded immediately by a
# tab and 5 hex digits for its code, with a \n before those. Named
# sequences won't have the 7th preceding character be a \n.
# (Actually, for the very first entry in the table this isn't strictly
# true: subtracting 7 will yield -1, and the substr below will
# therefore yield the very last character in the table, which should
# also be a \n, so the statement works anyway.)
if (substr($txt, $off[0] - 7, 1) eq "\n") {
$utf8 = pack("U", CORE::hex substr($txt, $off[0] - 6, 5));
# Handle the single loose matching special case, in which two names
# differ only by a single medial hyphen. If the original had a
# hyphen (or more) in the right place, then it is that one.
$utf8 = $HANGUL_JUNGSEONG_O_E_utf8
if $loose
&& $utf8 eq $HANGUL_JUNGSEONG_OE_utf8
&& $name =~ m/O \s* - [-\s]* E/ix;
# Note that this wouldn't work if there were a 2nd
# OE in the name
}
else {
# Here, is a named sequence. Need to go looking for the beginning,
# which is just after the \n from the previous entry in the table.
# The +1 skips past that newline, or, if the rindex() fails, to put
# us to an offset of zero.
my $charstart = rindex($txt, "\n", $off[0] - 7) + 1;
$utf8 = pack("U*", map { CORE::hex }
split " ", substr($txt, $charstart, $off[0] - $charstart - 1));
}
}
# Cache the input so as to not have to search the large table
# again, but only if it came from the one search that we cache.
# (Haven't bothered with the pain of sorting out scoping issues for the
# scripts searches.)
$cache_ref->{$name} = $utf8 if defined $cache_ref;
}
}
# Here, have the utf8. If the return is to be an ord, must be any single
# character.
if ($wants_ord) {
return ord($utf8) if length $utf8 == 1;
}
else {
# Here, wants string output. If utf8 is acceptable, just return what
# we've got; otherwise attempt to convert it to non-utf8 and return that.
my $in_bytes = ($runtime)
? (caller $runtime)[8] & $bytes::hint_bits
: $^H & $bytes::hint_bits;
return $utf8 if (! $in_bytes || utf8::downgrade($utf8, 1)) # The 1 arg
# means don't die on failure
}
# Here, there is an error: either there are too many characters, or the
# result string needs to be non-utf8, and at least one character requires
# utf8. Prefer any official name over the input one for the error message.
if (@off) {
$name = substr($txt, $off[0], $off[1] - $off[0]) if @off;
}
else {
$name = (defined $save_input) ? $save_input : $_[0];
}
if ($wants_ord) {
# Only way to get here in this case is if result too long. Message
# assumes that our only caller that requires single char result is
# vianame.
carp "charnames::vianame() doesn't handle named sequences ($name). Use charnames::string_vianame() instead";
return;
}
# Only other possible failure here is from use bytes.
if ($runtime) {
carp not_legal_use_bytes_msg($name, $utf8);
return;
} else {
croak not_legal_use_bytes_msg($name, $utf8);
}
} # lookup_name
sub charnames {
# For \N{...}. Looks up the character name and returns the string
# representation of it.
# The first 0 arg means wants a string returned; the second that we are in
# compile time
return lookup_name($_[0], 0, 0);
}
sub import
{
shift; ## ignore class name
if (not @_) {
carp("'use charnames' needs explicit imports list");
}
$^H{charnames} = \&charnames ;
$^H{charnames_ord_aliases} = {};
$^H{charnames_name_aliases} = {};
$^H{charnames_inverse_ords} = {};
# New fields must be added to %dummy_H, and the code in lookup_name()
# that copies fields from the runtime structure
##
## fill %h keys with our @_ args.
##
my ($promote, %h, @args) = (0);
while (my $arg = shift) {
if ($arg eq ":alias") {
@_ or
croak ":alias needs an argument in charnames";
my $alias = shift;
if (ref $alias) {
ref $alias eq "HASH" or
croak "Only HASH reference supported as argument to :alias";
alias ($alias);
next;
}
if ($alias =~ m{:(\w+)$}) {
$1 eq "full" || $1 eq "loose" || $1 eq "short" and
croak ":alias cannot use existing pragma :$1 (reversed order?)";
alias_file ($1) and $promote = 1;
next;
}
alias_file ($alias);
next;
}
if (substr($arg, 0, 1) eq ':'
and ! ($arg eq ":full" || $arg eq ":short" || $arg eq ":loose"))
{
warn "unsupported special '$arg' in charnames";
next;
}
push @args, $arg;
}
@args == 0 && $promote and @args = (":full");
@h{@args} = (1) x @args;
# Don't leave these undefined as are tested for in lookup_names
$^H{charnames_full} = delete $h{':full'} || 0;
$^H{charnames_loose} = delete $h{':loose'} || 0;
$^H{charnames_short} = delete $h{':short'} || 0;
my @scripts = map { uc quotemeta } keys %h;
##
## If utf8? warnings are enabled, and some scripts were given,
## see if at least we can find one letter from each script.
##
if (warnings::enabled('utf8') && @scripts) {
$txt = do "unicore/Name.pl" unless $txt;
for my $script (@scripts) {
if (not $txt =~ m/\t$script (?:CAPITAL |SMALL )?LETTER /) {
warnings::warn('utf8', "No such script: '$script'");
$script = quotemeta $script; # Escape it, for use in the re.
}
}
}
# %^H gets stringified, so serialize it ourselves so can extract the
# real data back later.
$^H{charnames_stringified_ords} = join ",", %{$^H{charnames_ord_aliases}};
$^H{charnames_stringified_names} = join ",", %{$^H{charnames_name_aliases}};
$^H{charnames_stringified_inverse_ords} = join ",", %{$^H{charnames_inverse_ords}};
# Modify the input script names for loose name matching if that is also
# specified, similar to the way the base character name is prepared. They
# don't (currently, and hopefully never will) have dashes. These go into a
# regex, and have already been uppercased and quotemeta'd. Squeeze out all
# input underscores, blanks, and dashes. Then convert so will match a blank
# between any characters.
if ($^H{charnames_loose}) {
for (my $i = 0; $i < @scripts; $i++) {
$scripts[$i] =~ s/[_ -]//g;
$scripts[$i] =~ s/ ( [^\\] ) (?= . ) /$1\\ ?/gx;
}
}
$^H{charnames_scripts} = join "|", @scripts; # Stringifiy them as a trie
} # import
# Cache of already looked-up values. This is set to only contain
# official values, and user aliases can't override them, so scoping is
# not an issue.
my %viacode;
sub viacode {
# Returns the name of the code point argument
if (@_ != 1) {
carp "charnames::viacode() expects one argument";
return;
}
my $arg = shift;
# This is derived from Unicode::UCD, where it is nearly the same as the
# function _getcode(), but here it makes sure that even a hex argument
# has the proper number of leading zeros, which is critical in
# matching against $txt below
# Must check if decimal first; see comments at that definition
my $hex;
if ($arg =~ $decimal_qr) {
$hex = sprintf "%05X", $arg;
} elsif ($arg =~ $hex_qr) {
# Below is the line that differs from the _getcode() source
$hex = sprintf "%05X", hex $1;
} else {
carp("unexpected arg \"$arg\" to charnames::viacode()");
return;
}
return $viacode{$hex} if exists $viacode{$hex};
# If the code point is above the max in the table, there's no point
# looking through it. Checking the length first is slightly faster
if (length($hex) <= 5 || CORE::hex($hex) <= 0x10FFFF) {
$txt = do "unicore/Name.pl" unless $txt;
# See if the name is algorithmically determinable.
my $algorithmic = charnames::code_point_to_name_special(CORE::hex $hex);
if (defined $algorithmic) {
$viacode{$hex} = $algorithmic;
return $algorithmic;
}
# Return the official name, if exists. It's unclear to me (khw) at
# this juncture if it is better to return a user-defined override, so
# leaving it as is for now.
if ($txt =~ m/^$hex\t/m) {
# The name starts with the next character and goes up to the
# next new-line. Using capturing parentheses above instead of
# @+ more than doubles the execution time in Perl 5.13
$viacode{$hex} = substr($txt, $+[0], index($txt, "\n", $+[0]) - $+[0]);
return $viacode{$hex};
}
}
# See if there is a user name for it, before giving up completely.
# First get the scoped aliases, give up if have none.
my $H_ref = (caller(1))[10];
return if ! defined $H_ref
|| ! exists $H_ref->{charnames_stringified_inverse_ords};
my %code_point_aliases = split ',',
$H_ref->{charnames_stringified_inverse_ords};
if (! exists $code_point_aliases{$hex}) {
if (CORE::hex($hex) > 0x10FFFF) {
carp "Unicode characters only allocated up to U+10FFFF (you asked for U+$hex)";
}
return;
}
return $code_point_aliases{$hex};
} # _viacode
1;
# ex: set ts=8 sts=2 sw=2 et: