275 lines
8.9 KiB
Perl
275 lines
8.9 KiB
Perl
use v5.16.0;
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use strict;
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use warnings;
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require './regen/regen_lib.pl';
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require './regen/charset_translations.pl';
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use Unicode::UCD;
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use charnames qw(:loose);
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my $out_fh = open_new('unicode_constants.h', '>',
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{style => '*', by => $0,
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from => "Unicode data"});
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print $out_fh <<END;
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#ifndef PERL_UNICODE_CONSTANTS_H_ /* Guard against nested #includes */
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#define PERL_UNICODE_CONSTANTS_H_ 1
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/* This file contains #defines for the version of Unicode being used and
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* various Unicode code points. The values the code point macros expand to
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* are the native Unicode code point, or all or portions of the UTF-8 encoding
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* for the code point. In the former case, the macro name has the suffix
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* "_NATIVE"; otherwise, the suffix "_UTF8".
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*
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* The macros that have the suffix "_UTF8" may have further suffixes, as
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* follows:
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* "_FIRST_BYTE" if the value is just the first byte of the UTF-8
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* representation; the value will be a numeric constant.
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* "_TAIL" if instead it represents all but the first byte. This, and
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* with no additional suffix are both string constants */
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/*
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=head1 Unicode Support
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=for apidoc AmU|placeholder|BOM_UTF8
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This is a macro that evaluates to a string constant of the UTF-8 bytes that
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define the Unicode BYTE ORDER MARK (U+FEFF) for the platform that perl
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is compiled on. This allows code to use a mnemonic for this character that
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works on both ASCII and EBCDIC platforms.
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S<C<sizeof(BOM_UTF8) - 1>> can be used to get its length in
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bytes.
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=for apidoc AmU|placeholder|REPLACEMENT_CHARACTER_UTF8
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This is a macro that evaluates to a string constant of the UTF-8 bytes that
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define the Unicode REPLACEMENT CHARACTER (U+FFFD) for the platform that perl
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is compiled on. This allows code to use a mnemonic for this character that
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works on both ASCII and EBCDIC platforms.
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S<C<sizeof(REPLACEMENT_CHARACTER_UTF8) - 1>> can be used to get its length in
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bytes.
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=cut
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*/
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END
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my $version = Unicode::UCD::UnicodeVersion();
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my ($major, $dot, $dotdot) = $version =~ / (.*?) \. (.*?) (?: \. (.*) )? $ /x;
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$dotdot = 0 unless defined $dotdot;
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print $out_fh <<END;
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#define UNICODE_MAJOR_VERSION $major
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#define UNICODE_DOT_VERSION $dot
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#define UNICODE_DOT_DOT_VERSION $dotdot
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END
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# The data are at __DATA__ in this file.
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my @data = <DATA>;
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foreach my $charset (get_supported_code_pages()) {
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print $out_fh "\n" . get_conditional_compile_line_start($charset);
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my @a2n = @{get_a2n($charset)};
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for ( @data ) {
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chomp;
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# Convert any '#' comments to /* ... */; empty lines and comments are
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# output as blank lines
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if ($_ =~ m/ ^ \s* (?: \# ( .* ) )? $ /x) {
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my $comment_body = $1 // "";
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if ($comment_body ne "") {
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print $out_fh "/* $comment_body */\n";
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}
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else {
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print $out_fh "\n";
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}
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next;
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}
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unless ($_ =~ m/ ^ ( [^\ ]* ) # Name or code point token
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(?: [\ ]+ ( [^ ]* ) )? # optional flag
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(?: [\ ]+ ( .* ) )? # name if unnamed; flag is required
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/x)
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{
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die "Unexpected syntax at line $.: $_\n";
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}
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my $name_or_cp = $1;
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my $flag = $2;
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my $desired_name = $3;
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my $name;
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my $cp;
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my $U_cp; # code point in Unicode (not-native) terms
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if ($name_or_cp =~ /^U\+(.*)/) {
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$U_cp = hex $1;
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$name = charnames::viacode($name_or_cp);
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if (! defined $name) {
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next if $flag =~ /skip_if_undef/;
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die "Unknown code point '$name_or_cp' at line $.: $_\n" unless $desired_name;
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$name = "";
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}
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}
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else {
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$name = $name_or_cp;
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die "Unknown name '$name' at line $.: $_\n" unless defined $name;
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$U_cp = charnames::vianame($name =~ s/_/ /gr);
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}
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$cp = ($U_cp < 256)
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? $a2n[$U_cp]
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: $U_cp;
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$name = $desired_name if $name eq "" && $desired_name;
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$name =~ s/[- ]/_/g; # The macro name can have no blanks nor dashes
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my $str;
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my $suffix;
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if (defined $flag && $flag eq 'native') {
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die "Are you sure you want to run this on an above-Latin1 code point?" if $cp > 0xff;
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$suffix = '_NATIVE';
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$str = sprintf "0x%02X", $cp; # Is a numeric constant
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}
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else {
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$str = join "", map { sprintf "\\x%02X", ord $_ } split //, cp_2_utfbytes($U_cp, $charset);
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$suffix = '_UTF8';
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if (! defined $flag || $flag =~ /^ string (_skip_if_undef)? $/x) {
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$str = "\"$str\""; # Will be a string constant
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} elsif ($flag eq 'tail') {
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$str =~ s/\\x..//; # Remove the first byte
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$suffix .= '_TAIL';
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$str = "\"$str\""; # Will be a string constant
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}
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elsif ($flag eq 'first') {
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$str =~ s/ \\x ( .. ) .* /$1/x; # Get the two nibbles of the 1st byte
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$suffix .= '_FIRST_BYTE';
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$str = "0x$str"; # Is a numeric constant
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}
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else {
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die "Unknown flag at line $.: $_\n";
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}
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}
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printf $out_fh "# define %s%s %s /* U+%04X */\n", $name, $suffix, $str, $U_cp;
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}
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my $max_PRINT_A = 0;
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for my $i (0x20 .. 0x7E) {
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$max_PRINT_A = $a2n[$i] if $a2n[$i] > $max_PRINT_A;
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}
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printf $out_fh "# define MAX_PRINT_A_FOR_USE_ONLY_BY_REGCOMP_DOT_C 0x%02X /* The max code point that isPRINT_A */\n", $max_PRINT_A;
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print $out_fh "\n" . get_conditional_compile_line_end();
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}
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use Unicode::UCD 'prop_invlist';
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my $count = 0;
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my @other_invlist = prop_invlist("Other");
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for (my $i = 0; $i < @other_invlist; $i += 2) {
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$count += ((defined $other_invlist[$i+1])
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? $other_invlist[$i+1]
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: 0x110000)
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- $other_invlist[$i];
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}
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printf $out_fh "\n/* The number of code points not matching \\pC */\n"
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. "#define NON_OTHER_COUNT_FOR_USE_ONLY_BY_REGCOMP_DOT_C %d\n",
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0x110000 - $count;
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# If this release has both the CWCM and CWCF properties, find the highest code
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# point which changes under any case change. We can use this to short-circuit
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# code
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my @cwcm = prop_invlist('CWCM');
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if (@cwcm) {
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my @cwcf = prop_invlist('CWCF');
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if (@cwcf) {
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my $max = ($cwcm[-1] < $cwcf[-1])
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? $cwcf[-1]
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: $cwcm[-1];
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printf $out_fh "\n/* The highest code point that has any type of case change */\n"
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. "#define HIGHEST_CASE_CHANGING_CP_FOR_USE_ONLY_BY_UTF8_DOT_C 0x%X\n",
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$max - 1;
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}
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}
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print $out_fh "\n#endif /* PERL_UNICODE_CONSTANTS_H_ */\n";
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read_only_bottom_close_and_rename($out_fh);
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# DATA FORMAT
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#
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# Note that any apidoc comments you want in the file need to be added to one
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# of the prints above
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#
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# A blank line is output as-is.
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# Comments (lines whose first non-blank is a '#') are converted to C-style,
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# though empty comments are converted to blank lines. Otherwise, each line
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# represents one #define, and begins with either a Unicode character name with
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# the blanks and dashes in it squeezed out or replaced by underscores; or it
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# may be a hexadecimal Unicode code point of the form U+xxxx. In the latter
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# case, the name will be looked-up to use as the name of the macro. In either
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# case, the macro name will have suffixes as listed above, and all blanks and
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# dashes will be replaced by underscores.
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#
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# Each line may optionally have one of the following flags on it, separated by
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# white space from the initial token.
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# string indicates that the output is to be of the string form
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# described in the comments above that are placed in the file.
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# string_skip_ifundef is the same as 'string', but instead of dying if the
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# code point doesn't exist, the line is just skipped: no output is
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# generated for it
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# first indicates that the output is to be of the FIRST_BYTE form.
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# tail indicates that the output is of the _TAIL form.
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# native indicates that the output is the code point, converted to the
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# platform's native character set if applicable
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#
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# If the code point has no official name, the desired name may be appended
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# after the flag, which will be ignored if there is an official name.
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#
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# This program is used to make it convenient to create compile time constants
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# of UTF-8, and to generate proper EBCDIC as well as ASCII without manually
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# having to figure things out.
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__DATA__
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U+017F string
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U+0300 string
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U+0307 string
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U+1E9E string_skip_if_undef
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U+FB05 string
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U+FB06 string
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U+0130 string
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U+0131 string
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U+2010 string
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BOM first
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BOM tail
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BOM string
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U+FFFD string
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U+10FFFF string MAX_UNICODE
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NBSP native
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NBSP string
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DEL native
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CR native
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LF native
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VT native
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ESC native
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U+00DF native
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U+00E5 native
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U+00C5 native
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U+00FF native
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U+00B5 native
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