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#!/usr/bin/perl
#
# Generate sorted list of non-overlapping intervals of non-spacing
# characters, using Unicode data files as input. Pass UnicodeData.txt
# as argument. The output is on stdout.
#
# Copyright (c) 2019, PostgreSQL Global Development Group
use strict;
use warnings;
my $range_start = undef;
my $codepoint;
my $prev_codepoint;
my $count = 0;
print
"/* generated by src/common/unicode/generate-unicode_combining_table.pl, do not edit */\n\n";
print "static const struct mbinterval combining[] = {\n";
foreach my $line (<ARGV>)
{
chomp $line;
my @fields = split ';', $line;
$codepoint = hex $fields[0];
next if $codepoint > 0xFFFF;
if ($fields[2] eq 'Me' || $fields[2] eq 'Mn')
{
# combining character, save for start of range
if (!defined($range_start))
{
$range_start = $codepoint;
}
}
else
{
# not a combining character, print out previous range if any
if (defined($range_start))
{
printf "\t{0x%04X, 0x%04X},\n", $range_start, $prev_codepoint;
$range_start = undef;
}
}
}
continue
{
$prev_codepoint = $codepoint;
}
print "};\n";
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