mirror of
https://github.com/stephenenelson/convert-binhex.git
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87 lines
3.0 KiB
Plaintext
87 lines
3.0 KiB
Plaintext
NAME
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Convert::BinHex - extract data from Macintosh BinHex files
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*ALPHA WARNING: this code is currently in its Alpha release. Things may
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change drastically until the interface is hammered out: if you have
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suggestions or objections, please speak up now!*
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SYNOPSIS
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Simple functions:
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use Convert::BinHex qw(binhex_crc macbinary_crc);
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# Compute HQX7-style CRC for data, pumping in old CRC if desired:
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$crc = binhex_crc($data, $crc);
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# Compute the MacBinary-II-style CRC for the data:
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$crc = macbinary_crc($data, $crc);
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Hex to bin, low-level interface. Conversion is actually done via an
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object (the section on "Convert::BinHex::Hex2Bin") which keeps internal
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conversion state:
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# Create and use a "translator" object:
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my $H2B = Convert::BinHex->hex2bin; # get a converter object
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while (<STDIN>) {
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print $STDOUT $H2B->next($_); # convert some more input
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}
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print $STDOUT $H2B->done; # no more input: finish up
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Hex to bin, OO interface. The following operations *must* be done in the
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order shown!
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# Read data in piecemeal:
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$HQX = Convert::BinHex->open(FH=>\*STDIN) || die "open: $!";
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$HQX->read_header; # read header info
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@data = $HQX->read_data; # read in all the data
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@rsrc = $HQX->read_resource; # read in all the resource
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Bin to hex, low-level interface. Conversion is actually done via an
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object (the section on "Convert::BinHex::Bin2Hex") which keeps internal
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conversion state:
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# Create and use a "translator" object:
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my $B2H = Convert::BinHex->bin2hex; # get a converter object
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while (<STDIN>) {
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print $STDOUT $B2H->next($_); # convert some more input
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}
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print $STDOUT $B2H->done; # no more input: finish up
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Bin to hex, file interface. Yes, you can convert *to* BinHex as well as
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from it!
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# Create new, empty object:
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my $HQX = Convert::BinHex->new;
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# Set header attributes:
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$HQX->filename("logo.gif");
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$HQX->type("GIFA");
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$HQX->creator("CNVS");
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# Give it the data and resource forks (either can be absent):
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$HQX->data(Path => "/path/to/data"); # here, data is on disk
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$HQX->resource(Data => $resourcefork); # here, resource is in core
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# Output as a BinHex stream, complete with leading comment:
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$HQX->encode(\*STDOUT);
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PLANNED!!!! Bin to hex, "CAP" interface. *Thanks to Ken Lunde for
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suggesting this*.
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# Create new, empty object from CAP tree:
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my $HQX = Convert::BinHex->from_cap("/path/to/root/file");
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$HQX->encode(\*STDOUT);
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DESCRIPTION
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BinHex is a format used by Macintosh for transporting Mac files safely
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through electronic mail, as short-lined, 7-bit, semi-compressed data
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streams. Ths module provides a means of converting those data streams
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back into into binary data.
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