source of perl for linux application,

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关键词: application source linux perl
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相关代码

				#!./perl								use strict;				use Encode;				use Getopt::Std;				my %Opt; getopts("ChH:e:f:t:s:pPv", \%Opt);				$Opt{p} ||= $Opt{P};				$Opt{e} ||= 'utf8';				$Opt{f} ||= $Opt{e};				$Opt{t} ||= $Opt{e};				$Opt{h} and help();								my ($linebuf, $outbuf);				my $CPL = $Opt{p} ? 64 : 8;				my $linenum;				my $linesperheading = $Opt{H};				my $nchars;				our $PrevChunk;								$Opt{h} and help();				$Opt{p} and do_perl($Opt{s});				do_dump($Opt{s});				exit;								#								sub do_perl{				    my $string = shift;				    $Opt{P} and print "#!$^X -w\nprint\n";				    unless ($string){				    while(){				        use utf8;				        $linebuf .=  Encode::decode($Opt{f}, $_);				        while($linebuf){				        my $chr =  render_p(substr($linebuf, 0, 1, ''));				        length($outbuf) + length($chr) > $CPL and print_P();				        $outbuf .= $chr;				        }				    }				    $outbuf and print print_P(";");				    }else{				    while($string){				        my $chr =  render_p(substr($string, 0, 1, ''));				        length($outbuf) + length($chr) > $CPL and print_P();				        $outbuf .= $chr;				    }				    }				    $outbuf and print print_P(";");				    exit;				}								sub render_p{				    my ($chr, $format) = @_;				    our %S2pstr;				    $S2pstr{$chr} and return $S2pstr{$chr}; # \t\n...				    $chr =~ /[\x20-\x7e]/ and return $chr;  # ascii, printable;				    my $fmt = ($chr =~ /[\x00-\x1f\x7F]/)  ?				    q(\x%x) : q(\x{%x});				    return sprintf $fmt, ord($chr);				}								sub print_P{				    my $end = shift;				    $outbuf or return;				    print '"', encode($Opt{t}, $outbuf), '"';				    my $tail = $Opt{P} ? $end ? "$end" :  "," : '';				    print $tail, "\n";				    $outbuf = '';				}								sub do_dump{				    my $string = shift;				    !$Opt{p} and exists $Opt{H} and print_H();				    unless ($string){				    while(){				        use utf8;				        $linebuf .=  Encode::decode($Opt{f}, $_);				        while (length($linebuf) > $CPL){				        my $chunk = substr($linebuf, 0, $CPL, '');				        print_C($chunk, $linenum++);				        $Opt{H} and $linenum % $Opt{H} == $CPL-1 and print_S();				        }				    }				    $linebuf and print_C($linebuf);				    }else{				    while ($string){				        my $chunk = substr($string, 0, $CPL, '');				        print_C($chunk, $linenum++);				        $Opt{H} and $linenum % $Opt{H} == $CPL-1 and print_S();				    }				    }				    exit;				}								sub print_S{				    print "--------+------------------------------------------------";				    if ($Opt{C}){				    print "-+-----------------";				    }				    print "\n";				}				sub print_H{				    print "  Offset      0     1     2     3     4     5     6     7";				    if ($Opt{C}){				    print " |  0 1 2 3 4 5 6 7";				    }				    print "\n";				    print_S;				}								sub print_C{				    my ($chunk, $linenum) = @_;				    if (!$Opt{v} and $chunk eq $PrevChunk){				    printf "%08x *\n", $linenum*8; return;				    }				    $PrevChunk = $chunk;				    my $end = length($chunk) - 1;				    my (@ord, @chr);				    for my $i (0..$end){				    use utf8;				    my $chr = substr($chunk,$i,1);				    my $ord = ord($chr);				    my $fmt = $ord 				    push @ord, (sprintf $fmt, $ord);				    $Opt{C} and push @chr, render_c($chr);				    }				    if (++$end < 7){				    for my $i ($end..7){				        push @ord, (" " x 6);				    }				    }				    my $line = sprintf "%08x %s", $linenum*8, join('', @ord);				    $Opt{C} and $line .= sprintf " | %s",  join('', @chr);				    print encode($Opt{t}, $line), "\n";				}								sub render_c{				    my ($chr, $format) = @_;				    our (%S2str, $IsFullWidth);				    $chr =~ /[\p{IsControl}\s]/o and return $S2str{$chr} || "  ";				    $chr =~ $IsFullWidth and return $chr; # as is				    return " " . $chr;				}								sub help{				    my $message = shift;				    use File::Basename;				    my $name = basename($0);				    $message and print STDERR "$name error: $message\n";				    print STDERR 				Usage:				  $name -[options...] [files...]				  $name -[options...] -s "string"				  $name -h				  -h prints this message.				Inherited from hexdump;				  -C Canonical unidump mode				  -v prints the duplicate line as is.  Without this option,				     single "*" will be printed instead.				For unidump only				  -p prints in perl literals that you can copy and paste directly				     to your perl script.				  -P prints in perl executable format!				  -u prints a bunch of "Uxxxx,".  Handy when you want to pass your				     characters in mailing lists. 				IO Options:				  -e io_encoding    same as "-f io_encoding -t io_encoding"				  -f from_encoding  convert the source stream from this encoding				  -t to_encoding    print to STDOUT in this encoding				  -s string         "string" will be converted instead of STDIN.				  -H nline          prints separater for each nlines of output.				                    0 means only the table headding be printed.				EOT				  exit;				}								BEGIN{				    our %S2pstr= (				          "\\" => '\\\\',				          "\0" => '\0',				          "\t" => '\t',				          "\n" => '\n',				          "\r" => '\r',				          "\v" => '\v',				          "\a" => '\a',				          "\e" => '\e',				          "\"" => qq(\\\"),				          "\'" => qq(\\\'),				          '$'  => '\$',				          "@"  => '\@',				          "%"  => '\%',				         );								    our %S2str = (				          qq(\x00) => q(\0),  # NULL				          qq(\x01) => q(^A),  # START OF HEADING				          qq(\x02) => q(^B),  # START OF TEXT				          qq(\x03) => q(^C),  # END OF TEXT				          qq(\x04) => q(^D),  # END OF TRANSMISSION				          qq(\x05) => q(^E),  # ENQUIRY				          qq(\x06) => q(^F),  # ACKNOWLEDGE				          qq(\x07) => q(\a),  # BELL				          qq(\x08) => q(^H),  # BACKSPACE				          qq(\x09) => q(\t),  # HORIZONTAL TABULATION				          qq(\x0A) => q(\n),  # LINE FEED				          qq(\x0B) => q(\v),  # VERTICAL TABULATION				          qq(\x0C) => q(^L),  # FORM FEED				          qq(\x0D) => q(\r),  # CARRIAGE RETURN				          qq(\x0E) => q(^N),  # SHIFT OUT				          qq(\x0F) => q(^O),  # SHIFT IN				          qq(\x10) => q(^P),  # DATA LINK ESCAPE				          qq(\x11) => q(^Q),  # DEVICE CONTROL ONE				          qq(\x12) => q(^R),  # DEVICE CONTROL TWO				          qq(\x13) => q(^S),  # DEVICE CONTROL THREE				          qq(\x14) => q(^T),  # DEVICE CONTROL FOUR				          qq(\x15) => q(^U),  # NEGATIVE ACKNOWLEDGE				          qq(\x16) => q(^V),  # SYNCHRONOUS IDLE				          qq(\x17) => q(^W),  # END OF TRANSMISSION BLOCK				          qq(\x18) => q(^X),  # CANCEL				          qq(\x19) => q(^Y),  # END OF MEDIUM				          qq(\x1A) => q(^Z),  # SUBSTITUTE				          qq(\x1B) => q(\e),  # ESCAPE (\c[)				          qq(\x1C) => "^\\",  # FILE SEPARATOR				          qq(\x1D) => "^\]",  # GROUP SEPARATOR				          qq(\x1E) => q(^^),  # RECORD SEPARATOR				          qq(\x1F) => q(^_),  # UNIT SEPARATOR				          );				    #				    # Generated out of lib/unicore/EastAsianWidth.txt 				    # will it work ?				    #		  				    our $IsFullWidth = 				    qr/^[				         \x{1100}-\x{1159}				         \x{115F}-\x{115F}				         \x{2329}-\x{232A}				         \x{2E80}-\x{2E99}				         \x{2E9B}-\x{2EF3}				         \x{2F00}-\x{2FD5}				         \x{2FF0}-\x{2FFB}				         \x{3000}-\x{303E}				         \x{3041}-\x{3096}				         \x{3099}-\x{30FF}				         \x{3105}-\x{312C}				         \x{3131}-\x{318E}				         \x{3190}-\x{31B7}				         \x{31F0}-\x{321C}				         \x{3220}-\x{3243}				         \x{3251}-\x{327B}				         \x{327F}-\x{32CB}				         \x{32D0}-\x{32FE}				         \x{3300}-\x{3376}				         \x{337B}-\x{33DD}				         \x{3400}-\x{4DB5}				         \x{4E00}-\x{9FA5}				         \x{33E0}-\x{33FE}				         \x{A000}-\x{A48C}				         \x{AC00}-\x{D7A3}				         \x{A490}-\x{A4C6}				         \x{F900}-\x{FA2D}				         \x{FA30}-\x{FA6A}				         \x{FE30}-\x{FE46}				         \x{FE49}-\x{FE52}				         \x{FE54}-\x{FE66}				         \x{FE68}-\x{FE6B}				         \x{FF01}-\x{FF60}				         \x{FFE0}-\x{FFE6}				         \x{20000}-\x{2A6D6}				     ]$/xo;				}								__END__							

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