File: unicode_constants.pl

package info (click to toggle)
perl 5.24.1-3+deb9u5
  • links: PTS, VCS
  • area: main
  • in suites: stretch
  • size: 103,716 kB
  • sloc: perl: 559,611; ansic: 293,886; sh: 67,316; pascal: 7,632; cpp: 3,895; makefile: 2,436; xml: 2,410; yacc: 989; sed: 6; lisp: 1
file content (243 lines) | stat: -rw-r--r-- 8,127 bytes parent folder | download
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
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 H_UNICODE_CONSTANTS   /* Guard against nested #includes */
#define H_UNICODE_CONSTANTS   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 */

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 /* H_UNICODE_CONSTANTS */\n";

read_only_bottom_close_and_rename($out_fh);

# DATA FORMAT
#
# 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

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