use v5.16.0;
use strict;
use warnings;
require './regen/regen_lib.pl';
require './regen/charset_translations.pl';
use Unicode::UCD;
use charnames qw(:loose);
my $out_fh = open_new('unicode_constants.h', '>',
{style => '*', by => $0,
from => "Unicode data"});
print $out_fh <<END;
#ifndef PERL_UNICODE_CONSTANTS_H_ /* Guard against nested #includes */
#define PERL_UNICODE_CONSTANTS_H_ 1
/* This file contains #defines for the version of Unicode being used and
* various Unicode code points. The values the code point macros expand to
* are the native Unicode code point, or all or portions of the UTF-8 encoding
* for the code point. In the former case, the macro name has the suffix
* "_NATIVE"; otherwise, the suffix "_UTF8".
*
* The macros that have the suffix "_UTF8" may have further suffixes, as
* follows:
* "_FIRST_BYTE" if the value is just the first byte of the UTF-8
* representation; the value will be a numeric constant.
* "_TAIL" if instead it represents all but the first byte. This, and
* with no additional suffix are both string constants */
/*
=head1 Unicode Support
=for apidoc AmU|placeholder|BOM_UTF8
This is a macro that evaluates to a string constant of the UTF-8 bytes that
define the Unicode BYTE ORDER MARK (U+FEFF) for the platform that perl
is compiled on. This allows code to use a mnemonic for this character that
works on both ASCII and EBCDIC platforms.
S<C<sizeof(BOM_UTF8) - 1>> can be used to get its length in
bytes.
=for apidoc AmU|placeholder|REPLACEMENT_CHARACTER_UTF8
This is a macro that evaluates to a string constant of the UTF-8 bytes that
define the Unicode REPLACEMENT CHARACTER (U+FFFD) for the platform that perl
is compiled on. This allows code to use a mnemonic for this character that
works on both ASCII and EBCDIC platforms.
S<C<sizeof(REPLACEMENT_CHARACTER_UTF8) - 1>> can be used to get its length in
bytes.
=cut
*/
END
my $version = Unicode::UCD::UnicodeVersion();
my ($major, $dot, $dotdot) = $version =~ / (.*?) \. (.*?) (?: \. (.*) )? $ /x;
$dotdot = 0 unless defined $dotdot;
print $out_fh <<END;
#define UNICODE_MAJOR_VERSION $major
#define UNICODE_DOT_VERSION $dot
#define UNICODE_DOT_DOT_VERSION $dotdot
END
# The data are at __DATA__ in this file.
my @data = <DATA>;
foreach my $charset (get_supported_code_pages()) {
print $out_fh "\n" . get_conditional_compile_line_start($charset);
my @a2n = @{get_a2n($charset)};
for ( @data ) {
chomp;
# Convert any '#' comments to /* ... */; empty lines and comments are
# output as blank lines
if ($_ =~ m/ ^ \s* (?: \# ( .* ) )? $ /x) {
my $comment_body = $1 // "";
if ($comment_body ne "") {
print $out_fh "/* $comment_body */\n";
}
else {
print $out_fh "\n";
}
next;
}
unless ($_ =~ m/ ^ ( [^\ ]* ) # Name or code point token
(?: [\ ]+ ( [^ ]* ) )? # optional flag
(?: [\ ]+ ( .* ) )? # name if unnamed; flag is required
/x)
{
die "Unexpected syntax at line $.: $_\n";
}
my $name_or_cp = $1;
my $flag = $2;
my $desired_name = $3;
my $name;
my $cp;
my $U_cp; # code point in Unicode (not-native) terms
if ($name_or_cp =~ /^U\+(.*)/) {
$U_cp = hex $1;
$name = charnames::viacode($name_or_cp);
if (! defined $name) {
next if $flag =~ /skip_if_undef/;
die "Unknown code point '$name_or_cp' at line $.: $_\n" unless $desired_name;
$name = "";
}
}
else {
$name = $name_or_cp;
die "Unknown name '$name' at line $.: $_\n" unless defined $name;
$U_cp = charnames::vianame($name =~ s/_/ /gr);
}
$cp = ($U_cp < 256)
? $a2n[$U_cp]
: $U_cp;
$name = $desired_name if $name eq "" && $desired_name;
$name =~ s/[- ]/_/g; # The macro name can have no blanks nor dashes
my $str;
my $suffix;
if (defined $flag && $flag eq 'native') {
die "Are you sure you want to run this on an above-Latin1 code point?" if $cp > 0xff;
$suffix = '_NATIVE';
$str = sprintf "0x%02X", $cp; # Is a numeric constant
}
else {
$str = join "", map { sprintf "\\x%02X", ord $_ } split //, cp_2_utfbytes($U_cp, $charset);
$suffix = '_UTF8';
if (! defined $flag || $flag =~ /^ string (_skip_if_undef)? $/x) {
$str = "\"$str\""; # Will be a string constant
} elsif ($flag eq 'tail') {
$str =~ s/\\x..//; # Remove the first byte
$suffix .= '_TAIL';
$str = "\"$str\""; # Will be a string constant
}
elsif ($flag eq 'first') {
$str =~ s/ \\x ( .. ) .* /$1/x; # Get the two nibbles of the 1st byte
$suffix .= '_FIRST_BYTE';
$str = "0x$str"; # Is a numeric constant
}
else {
die "Unknown flag at line $.: $_\n";
}
}
printf $out_fh "# define %s%s %s /* U+%04X */\n", $name, $suffix, $str, $U_cp;
}
my $max_PRINT_A = 0;
for my $i (0x20 .. 0x7E) {
$max_PRINT_A = $a2n[$i] if $a2n[$i] > $max_PRINT_A;
}
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;
print $out_fh "\n" . get_conditional_compile_line_end();
}
use Unicode::UCD 'prop_invlist';
my $count = 0;
my @other_invlist = prop_invlist("Other");
for (my $i = 0; $i < @other_invlist; $i += 2) {
$count += ((defined $other_invlist[$i+1])
? $other_invlist[$i+1]
: 0x110000)
- $other_invlist[$i];
}
printf $out_fh "\n/* The number of code points not matching \\pC */\n"
. "#define NON_OTHER_COUNT_FOR_USE_ONLY_BY_REGCOMP_DOT_C %d\n",
0x110000 - $count;
# If this release has both the CWCM and CWCF properties, find the highest code
# point which changes under any case change. We can use this to short-circuit
# code
my @cwcm = prop_invlist('CWCM');
if (@cwcm) {
my @cwcf = prop_invlist('CWCF');
if (@cwcf) {
my $max = ($cwcm[-1] < $cwcf[-1])
? $cwcf[-1]
: $cwcm[-1];
printf $out_fh "\n/* The highest code point that has any type of case change */\n"
. "#define HIGHEST_CASE_CHANGING_CP_FOR_USE_ONLY_BY_UTF8_DOT_C 0x%X\n",
$max - 1;
}
}
print $out_fh "\n#endif /* PERL_UNICODE_CONSTANTS_H_ */\n";
read_only_bottom_close_and_rename($out_fh);
# DATA FORMAT
#
# Note that any apidoc comments you want in the file need to be added to one
# of the prints above
#
# A blank line is output as-is.
# Comments (lines whose first non-blank is a '#') are converted to C-style,
# though empty comments are converted to blank lines. Otherwise, each line
# represents one #define, and begins with either a Unicode character name with
# the blanks and dashes in it squeezed out or replaced by underscores; or it
# may be a hexadecimal Unicode code point of the form U+xxxx. In the latter
# case, the name will be looked-up to use as the name of the macro. In either
# case, the macro name will have suffixes as listed above, and all blanks and
# dashes will be replaced by underscores.
#
# Each line may optionally have one of the following flags on it, separated by
# white space from the initial token.
# string indicates that the output is to be of the string form
# described in the comments above that are placed in the file.
# string_skip_ifundef is the same as 'string', but instead of dying if the
# code point doesn't exist, the line is just skipped: no output is
# generated for it
# first indicates that the output is to be of the FIRST_BYTE form.
# tail indicates that the output is of the _TAIL form.
# native indicates that the output is the code point, converted to the
# platform's native character set if applicable
#
# If the code point has no official name, the desired name may be appended
# after the flag, which will be ignored if there is an official name.
#
# This program is used to make it convenient to create compile time constants
# of UTF-8, and to generate proper EBCDIC as well as ASCII without manually
# having to figure things out.
__DATA__
U+017F string
U+0300 string
U+0399 string
U+03BC string
U+1E9E string_skip_if_undef
U+FB05 string
U+FB06 string
U+0130 string
U+0131 string
U+2010 string
BOM first
BOM tail
BOM string
U+FFFD string
U+10FFFF string MAX_UNICODE
NBSP native
NBSP string
DEL native
CR native
LF native
VT native
ESC native
U+00DF native
U+00E5 native
U+00C5 native
U+00FF native
U+00B5 native