diff options
Diffstat (limited to 'lib/open.pm')
| -rw-r--r-- | lib/open.pm | 74 |
1 files changed, 63 insertions, 11 deletions
diff --git a/lib/open.pm b/lib/open.pm index d8a6350c1d..1c42b8aee9 100644 --- a/lib/open.pm +++ b/lib/open.pm @@ -25,8 +25,12 @@ sub _get_locale_encoding { } elsif ($ENV{LANG} =~ /^([^.]+)\.([^.]+)$/) { ($country_language, $locale_encoding) = ($1, $2); } - } else { - # Could do heuristics based on the country and language + } elsif (not $locale_encoding) { + if ($ENV{LC_ALL} =~ /\butf-?8\b/i || + $ENV{LANG} =~ /\butf-?8\b/i) { + $locale_encoding = 'utf8'; + } + # Could do more heuristics based on the country and language # parts of LC_ALL and LANG (the parts before the dot (if any)), # since we have Locale::Country and Locale::Language available. # TODO: get a database of Language -> Encoding mappings @@ -37,11 +41,11 @@ sub _get_locale_encoding { $locale_encoding eq 'euc' && defined $country_language) { if ($country_language =~ /^ja_JP|japan(?:ese)?$/i) { - $locale_encoding = 'eucjp'; + $locale_encoding = 'euc-jp'; } elsif ($country_language =~ /^ko_KR|korean?$/i) { - $locale_encoding = 'euckr'; + $locale_encoding = 'euc-kr'; } elsif ($country_language =~ /^zh_TW|taiwan(?:ese)?$/i) { - $locale_encoding = 'euctw'; + $locale_encoding = 'euc-tw'; } croak "Locale encoding 'euc' too ambiguous" if $locale_encoding eq 'euc'; @@ -56,9 +60,15 @@ sub import { my ($in,$out) = split(/\0/,(${^OPEN} || "\0"), -1); while (@args) { my $type = shift(@args); - my $discp = shift(@args); + my $dscp; + if ($type =~ /^:?(utf8|locale|encoding\(.+\))$/) { + $type = 'IO'; + $dscp = ":$1"; + } else { + $dscp = shift(@args); + } my @val; - foreach my $layer (split(/\s+/,$discp)) { + foreach my $layer (split(/\s+/,$dscp)) { $layer =~ s/^://; if ($layer eq 'locale') { use Encode; @@ -88,14 +98,14 @@ sub import { elsif ($type eq 'OUT') { $out = join(' ',@val); } - elsif ($type eq 'INOUT') { + elsif ($type eq 'IO') { $in = $out = join(' ',@val); } else { croak "Unknown discipline class '$type'"; } } - ${^OPEN} = join('\0',$in,$out); + ${^OPEN} = join("\0",$in,$out); } 1; @@ -107,8 +117,15 @@ open - perl pragma to set default disciplines for input and output =head1 SYNOPSIS - use open IN => ":crlf", OUT => ":raw"; - use open INOUT => ":utf8"; + use open IN => ":crlf", OUT => ":raw"; + use open OUT => ':utf8'; + use open IO => ":encoding(iso-8859-7)"; + + use open IO => ':locale'; + + use open ':utf8'; + use open ':locale'; + use open ':encoding(iso-8859-7)'; =head1 DESCRIPTION @@ -124,6 +141,41 @@ I/O operations. Any open(), readpipe() (aka qx//) and similar operators found within the lexical scope of this pragma will use the declared defaults. +With the C<IN> subpragma you can declare the default layers +of input sterams, and with the C<OUT> subpragma you can declare +the default layers of output streams. With the C<IO> subpragma +you can control both input and output streams simultaneously. + +If you have a legacy encoding, you can use the C<:encoding(...)> tag. + +if you want to set your encoding disciplines based on your +locale environment variables, you can use the C<:locale> tag. +For example: + + $ENV{LANG} = 'ru_RU.KOI8-R'; + use open ':locale'; + open(O, ">koi8"); + print O chr(0x430); # Unicode CYRILLIC SMALL LETTER A = KOI8-R 0xC1 + close O; + open(I, "<koi8"); + printf "%#x\n", ord(<I>), "\n"; # this should print 0xC1 + close I; + +These are equivalent + + use open ':utf8'; + use open IO => ':utf8'; + +as are these + + use open ':locale'; + use open IO => ':locale'; + +and these + + use open ':encoding(iso-8859-7)'; + use open IO => ':encoding(iso-8859-7)'; + When open() is given an explicit list of layers they are appended to the list declared using this pragma. |