4 require 'regen/regen_lib.pl';
5 require 'regen/charset_translations.pl';
6 use charnames qw(:loose);
8 my $out_fh = open_new('unicode_constants.h', '>',
9 {style => '*', by => $0,
10 from => "Unicode data"});
14 #ifndef H_UNICODE_CONSTANTS /* Guard against nested #includes */
15 #define H_UNICODE_CONSTANTS 1
17 /* This file contains #defines for various Unicode code points. The values
18 * the macros expand to are the native Unicode code point, or all or portions
19 * of the UTF-8 encoding for the code point. In the former case, the macro
20 * name has the suffix "_NATIVE"; otherwise, the suffix "_UTF8".
22 * The macros that have the suffix "_UTF8" may have further suffixes, as
24 * "_FIRST_BYTE" if the value is just the first byte of the UTF-8
25 * representation; the value will be a numeric constant.
26 * "_TAIL" if instead it represents all but the first byte. This, and
27 * with no additional suffix are both string constants */
31 # The data are at the end of this file. A blank line is output as-is.
32 # Comments (lines whose first non-blank is a '#') are converted to C-style,
33 # though empty comments are converted to blank lines. Otherwise, each line
34 # represents one #define, and begins with either a Unicode character name with
35 # the blanks and dashes in it squeezed out or replaced by underscores; or it
36 # may be a hexadecimal Unicode code point of the form U+xxxx. In the latter
37 # case, the name will be looked-up to use as the name of the macro. In either
38 # case, the macro name will have suffixes as listed above, and all blanks and
39 # dashes will be replaced by underscores.
41 # Each line may optionally have one of the following flags on it, separated by
42 # white space from the initial token.
43 # string indicates that the output is to be of the string form
44 # described in the comments above that are placed in the file.
45 # string_skip_ifundef is the same as 'string', but instead of dying if the
46 # code point doesn't exist, the line is just skipped: no output is
48 # first indicates that the output is to be of the FIRST_BYTE form.
49 # tail indicates that the output is of the _TAIL form.
50 # native indicates that the output is the code point, converted to the
51 # platform's native character set if applicable
53 # If the code point has no official name, the desired name may be appended
54 # after the flag, which will be ignored if there is an official name.
56 # This program is used to make it convenient to create compile time constants
57 # of UTF-8, and to generate proper EBCDIC as well as ASCII without manually
58 # having to figure things out.
62 foreach my $charset (get_supported_code_pages()) {
63 print $out_fh "\n" . get_conditional_compile_line_start($charset);
65 my @a2n = @{get_a2n($charset)};
70 # Convert any '#' comments to /* ... */; empty lines and comments are
71 # output as blank lines
72 if ($_ =~ m/ ^ \s* (?: \# ( .* ) )? $ /x) {
73 my $comment_body = $1 // "";
74 if ($comment_body ne "") {
75 print $out_fh "/* $comment_body */\n";
83 unless ($_ =~ m/ ^ ( [^\ ]* ) # Name or code point token
84 (?: [\ ]+ ( [^ ]* ) )? # optional flag
85 (?: [\ ]+ ( .* ) )? # name if unnamed; flag is required
88 die "Unexpected syntax at line $.: $_\n";
93 my $desired_name = $3;
97 my $U_cp; # code point in Unicode (not-native) terms
98 my $undef_ok = $desired_name || $flag =~ /skip_if_undef/;
100 if ($name_or_cp =~ /^U\+(.*)/) {
102 $name = charnames::viacode($name_or_cp);
103 if (! defined $name) {
104 die "Unknown code point '$name_or_cp' at line $.: $_\n" unless $undef_ok;
110 die "Unknown name '$name' at line $.: $_\n" unless defined $name;
111 $U_cp = charnames::vianame($name =~ s/_/ /gr);
118 $name = $desired_name if $name eq "" && $desired_name;
119 $name =~ s/[- ]/_/g; # The macro name can have no blanks nor dashes
123 if (defined $flag && $flag eq 'native') {
124 die "Are you sure you want to run this on an above-Latin1 code point?" if $cp > 0xff;
126 $str = sprintf "0x%02X", $cp; # Is a numeric constant
129 $str = join "", map { sprintf "\\x%02X", ord $_ } split //, cp_2_utfbytes($U_cp, $charset);
132 if (! defined $flag || $flag =~ /^ string (_skip_if_undef)? $/x) {
133 $str = "\"$str\""; # Will be a string constant
134 } elsif ($flag eq 'tail') {
135 $str =~ s/\\x..//; # Remove the first byte
137 $str = "\"$str\""; # Will be a string constant
139 elsif ($flag eq 'first') {
140 $str =~ s/ \\x ( .. ) .* /$1/x; # Get the two nibbles of the 1st byte
141 $suffix .= '_FIRST_BYTE';
142 $str = "0x$str"; # Is a numeric constant
145 die "Unknown flag at line $.: $_\n";
148 printf $out_fh "# define %s%s %s /* U+%04X */\n", $name, $suffix, $str, $U_cp;
152 for my $i (0x20 .. 0x7E) {
153 $max_PRINT_A = $a2n[$i] if $a2n[$i] > $max_PRINT_A;
155 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;
157 print $out_fh "\n" . get_conditional_compile_line_end();
161 use Unicode::UCD 'prop_invlist';
164 my @other_invlist = prop_invlist("Other");
165 for (my $i = 0; $i < @other_invlist; $i += 2) {
166 $count += ((defined $other_invlist[$i+1])
167 ? $other_invlist[$i+1]
169 - $other_invlist[$i];
171 printf $out_fh "\n/* The number of code points not matching \\pC */\n"
172 . "#define NON_OTHER_COUNT_FOR_USE_ONLY_BY_REGCOMP_DOT_C %d\n",
175 print $out_fh "\n#endif /* H_UNICODE_CONSTANTS */\n";
177 read_only_bottom_close_and_rename($out_fh);
193 U+D800 first FIRST_SURROGATE