97 lines
2.2 KiB
Perl
97 lines
2.2 KiB
Perl
package ExtUtils::Constant::Utils;
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use strict;
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use vars qw($VERSION @EXPORT_OK @ISA);
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@ISA = 'Exporter';
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@EXPORT_OK = qw(C_stringify perl_stringify);
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$VERSION = '0.01';
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=head1 NAME
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ExtUtils::Constant::Utils - helper functions for ExtUtils::Constant
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=head1 SYNOPSIS
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use ExtUtils::Constant::Utils qw (C_stringify);
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$C_code = C_stringify $stuff;
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=head1 DESCRIPTION
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ExtUtils::Constant::Utils packages up utility subroutines used by
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ExtUtils::Constant, ExtUtils::Constant::Base and derived classes. All its
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functions are explicitly exportable.
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=head1 USAGE
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=over 4
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=item C_stringify NAME
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A function which returns a 7 bit ASCII correctly \ escaped version of the
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string passed suitable for C's "" or ''. It will die if passed Unicode
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characters.
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=cut
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# Hopefully make a happy C identifier.
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sub C_stringify {
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local $_ = shift;
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return unless defined $_;
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# grr 5.6.1
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die "Wide character in '$_' intended as a C identifier"
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if tr/\0-\377// != length;
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s/\\/\\\\/g;
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s/([\"\'])/\\$1/g; # Grr. fix perl mode.
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s/\n/\\n/g; # Ensure newlines don't end up in octal
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s/\r/\\r/g;
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s/\t/\\t/g;
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s/\f/\\f/g;
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s/\a/\\a/g;
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if (ord('A') == 193) { # EBCDIC has no ^\0-\177 workalike.
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s/([[:^print:]])/{sprintf "\\\%03o", ord $1}/g;
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} else {
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s/([^\0-\177])/{sprintf "\\\%03o", ord $1}/g;
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}
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# This will elicit a warning on 5.005_03 about [: :] being reserved unless
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# I cheat
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my $cheat = '([[:^print:]])';
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s/$cheat/{sprintf "\\\%03o", ord $1}/g;
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$_;
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}
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=item perl_stringify NAME
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A function which returns a 7 bit ASCII correctly \ escaped version of the
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string passed suitable for a perl "" string.
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=cut
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# Hopefully make a happy perl identifier.
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sub perl_stringify {
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local $_ = shift;
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return unless defined $_;
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s/\\/\\\\/g;
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s/([\"\'])/\\$1/g; # Grr. fix perl mode.
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s/\n/\\n/g; # Ensure newlines don't end up in octal
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s/\r/\\r/g;
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s/\t/\\t/g;
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s/\f/\\f/g;
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s/\a/\\a/g;
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s/([^\0-\177])/{sprintf "\\x\{\%X\}", ord $1}/g;
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# This will elicit a warning on 5.005_03 about [: :] being reserved unless
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# I cheat
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my $cheat = '([[:^print:]])';
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s/$cheat/{sprintf "\\\%03o", ord $1}/g;
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$_;
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}
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1;
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__END__
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=back
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=head1 AUTHOR
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Nicholas Clark <nick@ccl4.org> based on the code in C<h2xs> by Larry Wall and
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others
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