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pp.c: Eliminate custom macro and use Copy() instead
[perl5.git] / regen / unicode_constants.pl
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1use v5.16.0;
2use strict;
3use warnings;
4require 'regen/regen_lib.pl';
5use charnames qw(:loose);
6
1b0f46bf 7my $out_fh = open_new('unicode_constants.h', '>',
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8 {style => '*', by => $0,
9 from => "Unicode data"});
10
11print $out_fh <<END;
d10c72f2 12
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13#ifndef H_UNICODE_CONSTANTS /* Guard against nested #includes */
14#define H_UNICODE_CONSTANTS 1
d10c72f2 15
61dad979 16/* This file contains #defines for various Unicode code points. The values
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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".
61dad979 20 *
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21 * The macros that have the suffix "_UTF8" may have further suffixes, as
22 * follows:
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 */
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27
28END
29
76837d21 30# The data are at the end of this file. A blank line is output as-is.
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31# Comments (lines whose first non-blank is a '#') are converted to C-style,
32# though empty comments are converted to blank lines. Otherwise, each line
33# represents one #define, and begins with either a Unicode character name with
34# the blanks and dashes in it squeezed out or replaced by underscores; or it
1dfa4f52 35# may be a hexadecimal Unicode code point of the form U+xxxx. In the latter
76837d21 36# case, the name will be looked-up to use as the name of the macro. In either
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37# case, the macro name will have suffixes as listed above, and all blanks and
38# dashes will be replaced by underscores.
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39#
40# Each line may optionally have one of the following flags on it, separated by
41# white space from the initial token.
5f1720e9 42# string indicates that the output is to be of the string form
61dad979 43# described in the comments above that are placed in the file.
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44# string_skip_ifundef is the same as 'string', but instead of dying if the
45# code point doesn't exist, the line is just skipped: no output is
46# generated for it
5f1720e9 47# first indicates that the output is to be of the FIRST_BYTE form.
61dad979 48# tail indicates that the output is of the _TAIL form.
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49# native indicates that the output is the code point, converted to the
50# platform's native character set if applicable
61dad979 51#
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52# If the code point has no official name, the desired name may be appended
53# after the flag, which will be ignored if there is an official name.
54#
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55# This program is used to make it convenient to create compile time constants
56# of UTF-8, and to generate proper EBCDIC as well as ASCII without manually
57# having to figure things out.
58
59while ( <DATA> ) {
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60 chomp;
61
62 # Convert any '#' comments to /* ... */; empty lines and comments are
63 # output as blank lines
64 if ($_ =~ m/ ^ \s* (?: \# ( .* ) )? $ /x) {
65 my $comment_body = $1 // "";
66 if ($comment_body ne "") {
67 print $out_fh "/* $comment_body */\n";
68 }
69 else {
70 print $out_fh "\n";
71 }
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72 next;
73 }
74
61dad979 75 unless ($_ =~ m/ ^ ( [^\ ]* ) # Name or code point token
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76 (?: [\ ]+ ( [^ ]* ) )? # optional flag
77 (?: [\ ]+ ( .* ) )? # name if unnamed; flag is required
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78 /x)
79 {
80 die "Unexpected syntax at line $.: $_\n";
81 }
82
83 my $name_or_cp = $1;
84 my $flag = $2;
765ec46c 85 my $desired_name = $3;
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86
87 my $name;
88 my $cp;
1dfa4f52 89 my $U_cp; # code point in Unicode (not-native) terms
632c9f80 90 my $undef_ok = $desired_name || $flag =~ /skip_if_undef/;
61dad979 91
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92 if ($name_or_cp =~ /^U\+(.*)/) {
93 $U_cp = hex $1;
94 $name = charnames::viacode($name_or_cp);
632c9f80 95 if (! defined $name) {
1dfa4f52 96 die "Unknown code point '$name_or_cp' at line $.: $_\n" unless $undef_ok;
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97 $name = "";
98 }
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99 $cp = utf8::unicode_to_native($U_cp);
100 }
101 else {
102 $name = $name_or_cp;
103 $cp = charnames::vianame($name =~ s/_/ /gr);
104 $U_cp = utf8::native_to_unicode($cp);
105 die "Unknown name '$name' at line $.: $_\n" unless defined $name;
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106 }
107
632c9f80 108 $name = $desired_name if $name eq "" && $desired_name;
e9cddfae 109 $name =~ s/[- ]/_/g; # The macro name can have no blanks nor dashes
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110
111 my $str = join "", map { sprintf "\\x%02X", $_ }
1dfa4f52 112 unpack("U0C*", pack("U", $cp));
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113
114 my $suffix = '_UTF8';
632c9f80 115 if (! defined $flag || $flag =~ /^ string (_skip_if_undef)? $/x) {
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116 $str = "\"$str\""; # Will be a string constant
117 } elsif ($flag eq 'tail') {
118 $str =~ s/\\x..//; # Remove the first byte
119 $suffix .= '_TAIL';
120 $str = "\"$str\""; # Will be a string constant
121 }
122 elsif ($flag eq 'first') {
123 $str =~ s/ \\x ( .. ) .* /$1/x; # Get the two nibbles of the 1st byte
124 $suffix .= '_FIRST_BYTE';
125 $str = "0x$str"; # Is a numeric constant
126 }
525b6419 127 elsif ($flag eq 'native') {
1dfa4f52 128 die "Are you sure you want to run this on an above-Latin1 code point?" if $cp > 0xff;
525b6419 129 $suffix = '_NATIVE';
1dfa4f52 130 $str = sprintf "0x%02X", $cp; # Is a numeric constant
525b6419 131 }
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132 else {
133 die "Unknown flag at line $.: $_\n";
134 }
1dfa4f52 135 printf $out_fh "#define %s%s %s /* U+%04X */\n", $name, $suffix, $str, $U_cp;
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136}
137
1b0f46bf 138print $out_fh "\n#endif /* H_UNICODE_CONSTANTS */\n";
d10c72f2 139
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140read_only_bottom_close_and_rename($out_fh);
141
142__DATA__
76837d21 143
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144U+0300 string
145U+0301 string
146U+0308 string
147
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148U+0399 string
149U+03BC string
150
1dfa4f52 151U+03B9 string
76837d21 152
1dfa4f52 153U+03C5 string
76837d21 154
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155U+2010 string
156U+D800 first FIRST_SURROGATE
525b6419 157
05016631 158DEL native
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159U+00DF native
160U+00E5 native
161U+00C5 native
162U+00FF native
163U+00B5 native