4 require 'regen/regen_lib.pl';
5 use charnames qw(:loose);
7 my $out_fh = open_new('unicode_constants.h', '>',
8 {style => '*', by => $0,
9 from => "Unicode data"});
13 #ifndef H_UNICODE_CONSTANTS /* Guard against nested #includes */
14 #define H_UNICODE_CONSTANTS 1
16 /* This file contains #defines for various Unicode code points. The values
17 * the macros expand to are the native Unicode code point, or all or portions
18 * of the UTF-8 encoding for the code point. In the former case, the macro
19 * name has the suffix "_NATIVE"; otherwise, the suffix "_UTF8".
21 * The macros that have the suffix "_UTF8" may have further suffixes, as
23 * "_FIRST_BYTE" if the value is just the first byte of the UTF-8
24 * representation; the value will be a numeric constant.
25 * "_TAIL" if instead it represents all but the first byte. This, and
26 * with no additional suffix are both string constants */
30 # The data are at the end of this file. A blank line is output as-is.
31 # Otherwise, each line represents one #define, and begins with either a
32 # Unicode character name with the blanks in it squeezed out or replaced by
33 # underscores; or it may be a hexadecimal Unicode code point. In the latter
34 # case, the name will be looked-up to use as the name of the macro. In either
35 # case, the macro name will have suffixes as listed above, and all blanks will
36 # be replaced by underscores.
38 # Each line may optionally have one of the following flags on it, separated by
39 # white space from the initial token.
40 # string indicates that the output is to be of the string form
41 # described in the comments above that are placed in the file.
42 # first indicates that the output is to be of the FIRST_BYTE form.
43 # tail indicates that the output is of the _TAIL form.
44 # native indicates that the output is the code point, converted to the
45 # platform's native character set if applicable
47 # This program is used to make it convenient to create compile time constants
48 # of UTF-8, and to generate proper EBCDIC as well as ASCII without manually
49 # having to figure things out.
58 unless ($_ =~ m/ ^ ( [^\ ]* ) # Name or code point token
59 (?: [\ ]+ ( .* ) )? # optional flag
62 die "Unexpected syntax at line $.: $_\n";
71 if ($name_or_cp =~ /[^[:xdigit:]]/) {
73 # Anything that isn't a hex value must be a name.
75 $cp = charnames::vianame($name =~ s/_/ /gr);
76 die "Unknown name '$name' at line $.: $_\n" unless defined $name;
80 $name = charnames::viacode("0$cp"); # viacode requires a leading zero
81 # to be sure that the argument is hex
82 die "Unknown code point '$cp' at line $.: $_\n" unless defined $cp;
85 $name =~ s/ /_/g; # The macro name can have no blanks in it
87 my $str = join "", map { sprintf "\\x%02X", $_ }
88 unpack("U0C*", pack("U", hex $cp));
91 if (! defined $flag || $flag eq 'string') {
92 $str = "\"$str\""; # Will be a string constant
93 } elsif ($flag eq 'tail') {
94 $str =~ s/\\x..//; # Remove the first byte
96 $str = "\"$str\""; # Will be a string constant
98 elsif ($flag eq 'first') {
99 $str =~ s/ \\x ( .. ) .* /$1/x; # Get the two nibbles of the 1st byte
100 $suffix .= '_FIRST_BYTE';
101 $str = "0x$str"; # Is a numeric constant
103 elsif ($flag eq 'native') {
104 die "Are you sure you want to run this on an above-Latin1 code point?" if hex $cp > 0xff;
106 $str = utf8::unicode_to_native(hex $cp);
107 $str = "0x$cp"; # Is a numeric constant
110 die "Unknown flag at line $.: $_\n";
112 print $out_fh "#define ${name}$suffix $str /* U+$cp */\n";
115 print $out_fh "\n#endif /* H_UNICODE_CONSTANTS */\n";
117 read_only_bottom_close_and_rename($out_fh);