1 | package ExtUtils::Constant::Utils;
|
---|
2 |
|
---|
3 | use strict;
|
---|
4 | use vars qw($VERSION @EXPORT_OK @ISA $is_perl56);
|
---|
5 | use Carp;
|
---|
6 |
|
---|
7 | @ISA = 'Exporter';
|
---|
8 | @EXPORT_OK = qw(C_stringify perl_stringify);
|
---|
9 | $VERSION = '0.01';
|
---|
10 |
|
---|
11 | $is_perl56 = ($] < 5.007 && $] > 5.005_50);
|
---|
12 |
|
---|
13 | =head1 NAME
|
---|
14 |
|
---|
15 | ExtUtils::Constant::Utils - helper functions for ExtUtils::Constant
|
---|
16 |
|
---|
17 | =head1 SYNOPSIS
|
---|
18 |
|
---|
19 | use ExtUtils::Constant::Utils qw (C_stringify);
|
---|
20 | $C_code = C_stringify $stuff;
|
---|
21 |
|
---|
22 | =head1 DESCRIPTION
|
---|
23 |
|
---|
24 | ExtUtils::Constant::Utils packages up utility subroutines used by
|
---|
25 | ExtUtils::Constant, ExtUtils::Constant::Base and derived classes. All its
|
---|
26 | functions are explicitly exportable.
|
---|
27 |
|
---|
28 | =head1 USAGE
|
---|
29 |
|
---|
30 | =over 4
|
---|
31 |
|
---|
32 | =item C_stringify NAME
|
---|
33 |
|
---|
34 | A function which returns a 7 bit ASCII correctly \ escaped version of the
|
---|
35 | string passed suitable for C's "" or ''. It will die if passed Unicode
|
---|
36 | characters.
|
---|
37 |
|
---|
38 | =cut
|
---|
39 |
|
---|
40 | # Hopefully make a happy C identifier.
|
---|
41 | sub C_stringify {
|
---|
42 | local $_ = shift;
|
---|
43 | return unless defined $_;
|
---|
44 | # grr 5.6.1
|
---|
45 | confess "Wide character in '$_' intended as a C identifier"
|
---|
46 | if tr/\0-\377// != length;
|
---|
47 | # grr 5.6.1 moreso because its regexps will break on data that happens to
|
---|
48 | # be utf8, which includes my 8 bit test cases.
|
---|
49 | $_ = pack 'C*', unpack 'U*', $_ . pack 'U*' if $is_perl56;
|
---|
50 | s/\\/\\\\/g;
|
---|
51 | s/([\"\'])/\\$1/g; # Grr. fix perl mode.
|
---|
52 | s/\n/\\n/g; # Ensure newlines don't end up in octal
|
---|
53 | s/\r/\\r/g;
|
---|
54 | s/\t/\\t/g;
|
---|
55 | s/\f/\\f/g;
|
---|
56 | s/\a/\\a/g;
|
---|
57 | s/([^\0-\177])/sprintf "\\%03o", ord $1/ge;
|
---|
58 | unless ($] < 5.006) {
|
---|
59 | # This will elicit a warning on 5.005_03 about [: :] being reserved unless
|
---|
60 | # I cheat
|
---|
61 | my $cheat = '([[:^print:]])';
|
---|
62 | s/$cheat/sprintf "\\%03o", ord $1/ge;
|
---|
63 | } else {
|
---|
64 | require POSIX;
|
---|
65 | s/([^A-Za-z0-9_])/POSIX::isprint($1) ? $1 : sprintf "\\%03o", ord $1/ge;
|
---|
66 | }
|
---|
67 | $_;
|
---|
68 | }
|
---|
69 |
|
---|
70 | =item perl_stringify NAME
|
---|
71 |
|
---|
72 | A function which returns a 7 bit ASCII correctly \ escaped version of the
|
---|
73 | string passed suitable for a perl "" string.
|
---|
74 |
|
---|
75 | =cut
|
---|
76 |
|
---|
77 | # Hopefully make a happy perl identifier.
|
---|
78 | sub perl_stringify {
|
---|
79 | local $_ = shift;
|
---|
80 | return unless defined $_;
|
---|
81 | s/\\/\\\\/g;
|
---|
82 | s/([\"\'])/\\$1/g; # Grr. fix perl mode.
|
---|
83 | s/\n/\\n/g; # Ensure newlines don't end up in octal
|
---|
84 | s/\r/\\r/g;
|
---|
85 | s/\t/\\t/g;
|
---|
86 | s/\f/\\f/g;
|
---|
87 | s/\a/\\a/g;
|
---|
88 | unless ($] < 5.006) {
|
---|
89 | if ($] > 5.007) {
|
---|
90 | s/([^\0-\177])/sprintf "\\x{%X}", ord $1/ge;
|
---|
91 | } else {
|
---|
92 | # Grr 5.6.1. And I don't think I can use utf8; to force the regexp
|
---|
93 | # because 5.005_03 will fail.
|
---|
94 | # This is grim, but I also can't split on //
|
---|
95 | my $copy;
|
---|
96 | foreach my $index (0 .. length ($_) - 1) {
|
---|
97 | my $char = substr ($_, $index, 1);
|
---|
98 | $copy .= ($char le "\177") ? $char : sprintf "\\x{%X}", ord $char;
|
---|
99 | }
|
---|
100 | $_ = $copy;
|
---|
101 | }
|
---|
102 | # This will elicit a warning on 5.005_03 about [: :] being reserved unless
|
---|
103 | # I cheat
|
---|
104 | my $cheat = '([[:^print:]])';
|
---|
105 | s/$cheat/sprintf "\\%03o", ord $1/ge;
|
---|
106 | } else {
|
---|
107 | # Turns out "\x{}" notation only arrived with 5.6
|
---|
108 | s/([^\0-\177])/sprintf "\\x%02X", ord $1/ge;
|
---|
109 | require POSIX;
|
---|
110 | s/([^A-Za-z0-9_])/POSIX::isprint($1) ? $1 : sprintf "\\%03o", ord $1/ge;
|
---|
111 | }
|
---|
112 | $_;
|
---|
113 | }
|
---|
114 |
|
---|
115 | 1;
|
---|
116 | __END__
|
---|
117 |
|
---|
118 | =back
|
---|
119 |
|
---|
120 | =head1 AUTHOR
|
---|
121 |
|
---|
122 | Nicholas Clark <[email protected]> based on the code in C<h2xs> by Larry Wall and
|
---|
123 | others
|
---|