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