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package IO::SWF::Bit; |
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# |
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# This module is transport from |
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# |
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21428
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use strict; |
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use warnings; |
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use base 'Class::Accessor::Fast'; |
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1671
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__PACKAGE__->mk_accessors( qw( |
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_data |
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_byte_offset |
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_bit_offset |
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_hash |
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)); |
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sub new { |
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my ($class, $args) = @_; |
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my $self; |
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if(ref $args eq 'HASH') { |
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$self = $class->SUPER::new($args); |
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}else{ |
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$self = $class->SUPER::new; |
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$self->input(''); |
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} |
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return $self; |
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} |
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### |
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# |
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# data i/o method |
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# |
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# ## |
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sub input { |
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my ($self, $data) = @_; |
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$self->_data($data); |
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$self->_byte_offset(0); |
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$self->_bit_offset(0); |
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} |
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sub output { |
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my ($self, $offset) = @_; |
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$offset ||= 0; |
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my $output_len = $self->_byte_offset; |
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if ($self->_bit_offset > 0) { |
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$output_len++; |
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} |
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if (length($self->_data) == $output_len) { |
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return $self->_data; |
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} |
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return substr($self->_data, $offset, $output_len); |
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} |
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### |
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# |
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# offset method |
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# |
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### |
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sub hasNextData { |
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my ($self, $length) = @_; |
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$length ||= 1; |
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if (length($self->_data) < $self->_byte_offset + $length) { |
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return 0; |
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} |
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return 1; |
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} |
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sub setOffset { |
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my ($self, $byte_offset, $bit_offset) = @_; |
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$self->_byte_offset($byte_offset); |
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$self->_bit_offset($bit_offset); |
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return 1; |
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} |
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sub incrementOffset { |
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my ($self, $byte_offset, $bit_offset) = @_; |
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$self->_byte_offset($self->_byte_offset + $byte_offset); |
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$self->_bit_offset($self->_bit_offset + $bit_offset); |
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while ($self->_bit_offset >= 8) { |
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$self->_byte_offset($self->_byte_offset + 1); |
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$self->_bit_offset($self->_bit_offset - 8); |
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} |
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while ($self->_bit_offset < 0) { |
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$self->_byte_offset($self->_byte_offset - 1); |
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$self->_bit_offset($self->_bit_offset + 8); |
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} |
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return 1; |
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} |
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sub getOffset { |
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my $self = shift; |
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return ($self->_byte_offset, $self->_bit_offset); |
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} |
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sub byteAlign { |
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my $self = shift; |
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if ($self->_bit_offset > 0) { |
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$self->_byte_offset($self->_byte_offset + 1); |
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$self->_bit_offset(0); |
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} |
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} |
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105
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### |
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# |
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# get method |
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# |
109
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### |
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sub getData { |
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my ($self, $length) = @_; |
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$self->byteAlign(); |
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my $data = substr($self->_data, $self->_byte_offset, $length); |
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$self->_byte_offset($self->_byte_offset + length($data)); |
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return $data; |
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} |
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sub getDataUntil { |
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my ($self, $delimiter) = @_; |
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$self->byteAlign(); |
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my $pos = defined $delimiter ? index($self->_data, $delimiter, $self->_byte_offset) : undef; |
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my ($length, $delim_len); |
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if (!defined $pos || $pos < 0) { |
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$length = length($self->_data) - $self->_byte_offset; |
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$delim_len = 0; |
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} else { |
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$length = $pos - $self->_byte_offset; |
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$delim_len = length($delimiter); |
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} |
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my $data = $self->getData($length); |
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if ($delim_len > 0) { |
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$self->_byte_offset($self->_byte_offset + $delim_len); |
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} |
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return $data; |
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} |
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sub getUI8 { |
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my $self = shift; |
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$self->byteAlign(); |
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my $value = unpack('C', substr($self->_data, $self->_byte_offset, 1)); |
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$self->_byte_offset($self->_byte_offset + 1); |
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return $value; |
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} |
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147
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sub getSI8 { |
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my $self = shift; |
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my $value = $self->getUI8(); |
150
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$value -= (1<<8) if ($value>=(1<<7)); |
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return $value; |
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} |
153
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154
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sub getUI16BE { |
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my $self = shift; |
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$self->byteAlign(); |
157
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my $ret = unpack('n', substr($self->_data, $self->_byte_offset, 2)); |
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$self->_byte_offset($self->_byte_offset + 2); |
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return $ret; |
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} |
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162
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sub getUI32BE { |
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my $self = shift; |
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$self->byteAlign(); |
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my $ret = unpack('N', substr($self->_data, $self->_byte_offset, 4)); |
166
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$self->_byte_offset($self->_byte_offset + 4); |
167
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return $ret; |
168
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} |
169
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170
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sub getUI16LE { |
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my $self = shift; |
172
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$self->byteAlign(); |
173
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my $ret = unpack('v', substr($self->_data, $self->_byte_offset, 2)); |
174
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$self->_byte_offset($self->_byte_offset + 2); |
175
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return $ret; |
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} |
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178
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sub getSI16LE { |
179
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my $self = shift; |
180
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my $value = $self->getUI16LE(); |
181
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$value -= (1<<16) if ($value>=(1<<15)); |
182
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return $value; |
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} |
184
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185
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sub getUI32LE { |
186
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my $self = shift; |
187
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$self->byteAlign(); |
188
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my $ret = unpack('V', substr($self->_data, $self->_byte_offset, 4)); |
189
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$self->_byte_offset($self->_byte_offset + 4); |
190
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return $ret; |
191
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} |
192
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193
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sub getSI32LE { |
194
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my $self = shift; |
195
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my $value = $self->getUI32LE(); |
196
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$value -= (2**32) if ($value>=(2**31)); |
197
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return $value; |
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} |
199
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200
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sub getUIBit { |
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my $self = shift; |
202
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if (length($self->_data) <= $self->_byte_offset) { |
203
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my $data_len = length($self->_data); |
204
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my $offset = $self->_byte_offset; |
205
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die "getUIBit: $data_len <= $offset"; |
206
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} |
207
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my $value = ord(substr($self->_data, $self->_byte_offset, 1)); |
208
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$value = 1 & ($value >> (7 - $self->_bit_offset)); # MSB(Bit) first |
209
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$self->_bit_offset($self->_bit_offset + 1); |
210
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if (8 <= $self->_bit_offset) { |
211
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$self->_byte_offset($self->_byte_offset + 1); |
212
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$self->_bit_offset(0); |
213
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} |
214
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return $value; |
215
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} |
216
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217
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sub getUIBits { |
218
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my ($self, $width) = @_; |
219
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my $value = 0; |
220
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for (my $i = 0 ; $i < $width ; $i++) { |
221
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$value <<= 1; |
222
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$value |= $self->getUIBit(); |
223
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} |
224
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return $value; |
225
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} |
226
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227
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sub getSIBits { |
228
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my ($self, $width) = @_; |
229
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my $value = $self->getUIBits($width); |
230
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my $msb = $value & (1 << ($width - 1)); |
231
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if ($msb) { |
232
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my $bitmask = (2 * $msb) - 1; |
233
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$value = - ($value ^ $bitmask) - 1; |
234
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} |
235
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return $value; |
236
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} |
237
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238
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# start with the LSB(least significant bit) |
239
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|
sub getUIBitLSB { |
240
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|
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my $self = shift; |
241
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|
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if (length($self->_data) <= $self->_byte_offset) { |
242
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|
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|
my $data_len = length($self->_data); |
243
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|
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|
my $offset = $self->_byte_offset; |
244
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|
|
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|
die "getUIBitLSB: $data_len <= $offset"; |
245
|
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|
|
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|
} |
246
|
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|
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my $value = ord(substr($self->_data, $self->_byte_offset, 1)); |
247
|
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|
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|
$value = 1 & ($value >> $self->_bit_offset); # LSB(Bit) first |
248
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$self->_bit_offset($self->_bit_offset + 1); |
249
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|
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|
if (8 <= $self->_bit_offset) { |
250
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|
$self->_byte_offset($self->_byte_offset + 1); |
251
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|
$self->_bit_offset(0); |
252
|
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|
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|
} |
253
|
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|
return $value; |
254
|
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} |
255
|
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256
|
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|
|
sub getUIBitsLSB { |
257
|
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my ($self, $width) = @_; |
258
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|
my $value = 0; |
259
|
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|
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|
for (my $i = 0 ; $i < $width ; $i++) { |
260
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|
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$value |= $self->getUIBitLSB() << $i; # LSB(Bit) order |
261
|
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} |
262
|
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return $value; |
263
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|
} |
264
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265
|
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|
sub getSIBitsLSB { |
266
|
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|
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|
|
my ($self, $width) = @_; |
267
|
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|
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|
|
my $value = $self->getUIBitsLSB($width); |
268
|
|
|
|
|
|
|
my $msb = $value & (1 << ($width - 1)); |
269
|
|
|
|
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|
|
if ($msb) { |
270
|
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|
|
|
|
my $bitmask = (2 * $msb) - 1; |
271
|
|
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|
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|
|
$value = - ($value ^ $bitmask) - 1; |
272
|
|
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|
|
|
|
} |
273
|
|
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|
|
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|
return $value; |
274
|
|
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|
|
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|
} |
275
|
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276
|
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|
### |
277
|
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|
|
# |
278
|
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|
|
# put method |
279
|
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|
|
# |
280
|
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|
|
|
|
### |
281
|
|
|
|
|
|
|
sub putData { |
282
|
|
|
|
|
|
|
my ($self, $data) = @_; |
283
|
|
|
|
|
|
|
$self->byteAlign(); |
284
|
|
|
|
|
|
|
$self->_data($self->_data . $data); |
285
|
|
|
|
|
|
|
$self->_byte_offset($self->_byte_offset + length($data)); |
286
|
|
|
|
|
|
|
return 1; |
287
|
|
|
|
|
|
|
} |
288
|
|
|
|
|
|
|
|
289
|
|
|
|
|
|
|
sub putUI8 { |
290
|
|
|
|
|
|
|
my ($self, $value) = @_; |
291
|
|
|
|
|
|
|
$self->byteAlign(); |
292
|
|
|
|
|
|
|
$self->_data($self->_data . pack('C', $value)); |
293
|
|
|
|
|
|
|
$self->_byte_offset($self->_byte_offset + 1); |
294
|
|
|
|
|
|
|
return 1; |
295
|
|
|
|
|
|
|
} |
296
|
|
|
|
|
|
|
|
297
|
|
|
|
|
|
|
sub putSI8 { |
298
|
|
|
|
|
|
|
my ($self, $value) = @_; |
299
|
|
|
|
|
|
|
if ($value < 0) { |
300
|
|
|
|
|
|
|
$value = $value + 0x100; # 2-negative reverse |
301
|
|
|
|
|
|
|
} |
302
|
|
|
|
|
|
|
return $self->putUI8($value); |
303
|
|
|
|
|
|
|
} |
304
|
|
|
|
|
|
|
|
305
|
|
|
|
|
|
|
sub putUI16BE { |
306
|
|
|
|
|
|
|
my ($self, $value) = @_; |
307
|
|
|
|
|
|
|
$self->byteAlign(); |
308
|
|
|
|
|
|
|
$self->_data($self->_data . pack('n', $value)); |
309
|
|
|
|
|
|
|
$self->_byte_offset($self->_byte_offset + 2); |
310
|
|
|
|
|
|
|
return 1; |
311
|
|
|
|
|
|
|
} |
312
|
|
|
|
|
|
|
|
313
|
|
|
|
|
|
|
sub putUI32BE { |
314
|
|
|
|
|
|
|
my ($self, $value) = @_; |
315
|
|
|
|
|
|
|
$self->byteAlign(); |
316
|
|
|
|
|
|
|
$self->_data($self->_data . pack('N', $value)); |
317
|
|
|
|
|
|
|
$self->_byte_offset($self->_byte_offset + 4); |
318
|
|
|
|
|
|
|
return 1; |
319
|
|
|
|
|
|
|
} |
320
|
|
|
|
|
|
|
|
321
|
|
|
|
|
|
|
sub putUI16LE { |
322
|
|
|
|
|
|
|
my ($self, $value) = @_; |
323
|
|
|
|
|
|
|
$self->byteAlign(); |
324
|
|
|
|
|
|
|
$self->_data($self->_data . pack('v', $value)); |
325
|
|
|
|
|
|
|
$self->_byte_offset($self->_byte_offset + 2); |
326
|
|
|
|
|
|
|
return 1; |
327
|
|
|
|
|
|
|
} |
328
|
|
|
|
|
|
|
|
329
|
|
|
|
|
|
|
sub putSI16LE { |
330
|
|
|
|
|
|
|
my ($self, $value) = @_; |
331
|
|
|
|
|
|
|
if ($value < 0) { |
332
|
|
|
|
|
|
|
$value = $value + 0x10000; # 2-negative reverse |
333
|
|
|
|
|
|
|
} |
334
|
|
|
|
|
|
|
return $self->putUI16LE($value); |
335
|
|
|
|
|
|
|
} |
336
|
|
|
|
|
|
|
|
337
|
|
|
|
|
|
|
sub putUI32LE { |
338
|
|
|
|
|
|
|
my ($self, $value) = @_; |
339
|
|
|
|
|
|
|
$self->byteAlign(); |
340
|
|
|
|
|
|
|
$self->_data($self->_data . pack('V', $value)); |
341
|
|
|
|
|
|
|
$self->_byte_offset($self->_byte_offset + 4); |
342
|
|
|
|
|
|
|
return 1; |
343
|
|
|
|
|
|
|
} |
344
|
|
|
|
|
|
|
|
345
|
|
|
|
|
|
|
sub putSI32LE { |
346
|
|
|
|
|
|
|
my ($self, $value) = @_; |
347
|
|
|
|
|
|
|
return $self->putUI32LE($value); # XXX |
348
|
|
|
|
|
|
|
} |
349
|
|
|
|
|
|
|
|
350
|
|
|
|
|
|
|
sub _allocData { |
351
|
|
|
|
|
|
|
my ($self, $need_data_len) = @_; |
352
|
|
|
|
|
|
|
if (!defined $need_data_len) { |
353
|
|
|
|
|
|
|
$need_data_len = $self->_byte_offset; |
354
|
|
|
|
|
|
|
} |
355
|
|
|
|
|
|
|
my $data_len = length($self->_data); |
356
|
|
|
|
|
|
|
if ($data_len < $need_data_len) { |
357
|
|
|
|
|
|
|
my $buff = ''; |
358
|
|
|
|
|
|
|
while(length($buff) < $need_data_len - $data_len) { $buff .= chr(0) }; |
359
|
|
|
|
|
|
|
$self->_data($self->_data . $buff); |
360
|
|
|
|
|
|
|
} |
361
|
|
|
|
|
|
|
return 1; |
362
|
|
|
|
|
|
|
} |
363
|
|
|
|
|
|
|
|
364
|
|
|
|
|
|
|
sub putUIBit { |
365
|
|
|
|
|
|
|
my ($self, $bit) = @_; |
366
|
|
|
|
|
|
|
$self->_allocData($self->_byte_offset + 1); |
367
|
|
|
|
|
|
|
if ($bit > 0) { |
368
|
|
|
|
|
|
|
my $value = ord(substr($self->_data, $self->_byte_offset, 1)); |
369
|
|
|
|
|
|
|
$value |= 1 << (7 - $self->_bit_offset); |
370
|
|
|
|
|
|
|
my $new_data = $self->_data; |
371
|
|
|
|
|
|
|
substr($new_data, $self->_byte_offset, 1, chr($value)); |
372
|
|
|
|
|
|
|
$self->_data($new_data); |
373
|
|
|
|
|
|
|
} |
374
|
|
|
|
|
|
|
$self->_bit_offset($self->_bit_offset + 1); |
375
|
|
|
|
|
|
|
if (8 <= $self->_bit_offset) { |
376
|
|
|
|
|
|
|
$self->_byte_offset($self->_byte_offset + 1); |
377
|
|
|
|
|
|
|
$self->_bit_offset(0); |
378
|
|
|
|
|
|
|
} |
379
|
|
|
|
|
|
|
return 1; |
380
|
|
|
|
|
|
|
} |
381
|
|
|
|
|
|
|
|
382
|
|
|
|
|
|
|
sub putUIBits { |
383
|
|
|
|
|
|
|
my ($self, $value, $width) = @_; |
384
|
|
|
|
|
|
|
for (my $i = $width - 1 ; $i >= 0 ; $i--) { |
385
|
|
|
|
|
|
|
my $bit = ($value >> $i) & 1; |
386
|
|
|
|
|
|
|
my $ret = $self->putUIBit($bit); |
387
|
|
|
|
|
|
|
if (!$ret) { |
388
|
|
|
|
|
|
|
return $ret; |
389
|
|
|
|
|
|
|
} |
390
|
|
|
|
|
|
|
} |
391
|
|
|
|
|
|
|
return 1; |
392
|
|
|
|
|
|
|
} |
393
|
|
|
|
|
|
|
|
394
|
|
|
|
|
|
|
sub putSIBits { |
395
|
|
|
|
|
|
|
my ($self, $value, $width) = @_; |
396
|
|
|
|
|
|
|
if ($value < 0) { |
397
|
|
|
|
|
|
|
my $msb = 1 << ($width - 1); |
398
|
|
|
|
|
|
|
my $bitmask = (2 * $msb) - 1; |
399
|
|
|
|
|
|
|
$value = (-$value - 1) ^ $bitmask; |
400
|
|
|
|
|
|
|
} |
401
|
|
|
|
|
|
|
return $self->putUIBits($value, $width); |
402
|
|
|
|
|
|
|
} |
403
|
|
|
|
|
|
|
|
404
|
|
|
|
|
|
|
# start with the LSB(least significant bit) |
405
|
|
|
|
|
|
|
sub putUIBitLSB { |
406
|
|
|
|
|
|
|
my ($self, $bit) = @_; |
407
|
|
|
|
|
|
|
$self->_allocData($self->_byte_offset + 1); |
408
|
|
|
|
|
|
|
if ($bit > 0) { |
409
|
|
|
|
|
|
|
my $value = ord(substr($self->_data, $self->_byte_offset, 1)); |
410
|
|
|
|
|
|
|
$value |= 1 << $self->_bit_offset; # LSB(Bit) first |
411
|
|
|
|
|
|
|
my $new_data = $self->_data; |
412
|
|
|
|
|
|
|
substr($new_data, $self->_byte_offset, length($value), chr($value)); |
413
|
|
|
|
|
|
|
$self->_data($new_data); |
414
|
|
|
|
|
|
|
} |
415
|
|
|
|
|
|
|
$self->_bit_offset($self->_bit_offset + 1); |
416
|
|
|
|
|
|
|
if (8 <= $self->_bit_offset) { |
417
|
|
|
|
|
|
|
$self->_byte_offset($self->_byte_offset + 1); |
418
|
|
|
|
|
|
|
$self->_bit_offset(0); |
419
|
|
|
|
|
|
|
} |
420
|
|
|
|
|
|
|
return 1; |
421
|
|
|
|
|
|
|
} |
422
|
|
|
|
|
|
|
|
423
|
|
|
|
|
|
|
sub putUIBitsLSB { |
424
|
|
|
|
|
|
|
my ($self, $value, $width) = @_; |
425
|
|
|
|
|
|
|
for (my $i = 0 ; $i < $width ; $i--) { # LSB(Bit) order |
426
|
|
|
|
|
|
|
my $bit = ($value >> $i) & 1; |
427
|
|
|
|
|
|
|
my $ret = $self->putUIBit($bit); |
428
|
|
|
|
|
|
|
if (!$ret) { |
429
|
|
|
|
|
|
|
return $ret; |
430
|
|
|
|
|
|
|
} |
431
|
|
|
|
|
|
|
} |
432
|
|
|
|
|
|
|
return 1; |
433
|
|
|
|
|
|
|
} |
434
|
|
|
|
|
|
|
|
435
|
|
|
|
|
|
|
sub putSIBitsLSB { |
436
|
|
|
|
|
|
|
my ($self, $value, $width) = @_; |
437
|
|
|
|
|
|
|
if ($value < 0) { |
438
|
|
|
|
|
|
|
my $msb = 1 << ($width - 1); |
439
|
|
|
|
|
|
|
my $bitmask = (2 * $msb) - 1; |
440
|
|
|
|
|
|
|
$value = (-$value - 1) ^ $bitmask; |
441
|
|
|
|
|
|
|
} |
442
|
|
|
|
|
|
|
return $self->putUIBits($value, $width); |
443
|
|
|
|
|
|
|
} |
444
|
|
|
|
|
|
|
|
445
|
|
|
|
|
|
|
### |
446
|
|
|
|
|
|
|
# |
447
|
|
|
|
|
|
|
# set method |
448
|
|
|
|
|
|
|
# |
449
|
|
|
|
|
|
|
### |
450
|
|
|
|
|
|
|
sub setUI32LE { |
451
|
|
|
|
|
|
|
my ($self, $value, $byte_offset) = @_; |
452
|
|
|
|
|
|
|
my $data = pack('V', $value); |
453
|
|
|
|
|
|
|
my $new_data = $self->_data; |
454
|
|
|
|
|
|
|
substr($new_data, $byte_offset, length($data), $data); |
455
|
|
|
|
|
|
|
$self->_data($new_data); |
456
|
|
|
|
|
|
|
return 1; |
457
|
|
|
|
|
|
|
} |
458
|
|
|
|
|
|
|
|
459
|
|
|
|
|
|
|
### |
460
|
|
|
|
|
|
|
# |
461
|
|
|
|
|
|
|
# need bits |
462
|
|
|
|
|
|
|
# |
463
|
|
|
|
|
|
|
### |
464
|
|
|
|
|
|
|
sub need_bits_unsigned { |
465
|
|
|
|
|
|
|
my ($self, $n) = @_; |
466
|
|
|
|
|
|
|
my $i; |
467
|
|
|
|
|
|
|
for ($i = 0 ; $n ; $i++) { |
468
|
|
|
|
|
|
|
$n >>= 1; |
469
|
|
|
|
|
|
|
} |
470
|
|
|
|
|
|
|
return $i; |
471
|
|
|
|
|
|
|
} |
472
|
|
|
|
|
|
|
|
473
|
|
|
|
|
|
|
sub need_bits_signed { |
474
|
|
|
|
|
|
|
my ($self, $n) = @_; |
475
|
|
|
|
|
|
|
my $ret; |
476
|
|
|
|
|
|
|
if ($n < -1) { |
477
|
|
|
|
|
|
|
$n = -1 - $n; |
478
|
|
|
|
|
|
|
} |
479
|
|
|
|
|
|
|
if ($n >= 0) { |
480
|
|
|
|
|
|
|
my $i; |
481
|
|
|
|
|
|
|
for ($i = 0 ; $n ; $i++) { |
482
|
|
|
|
|
|
|
$n >>= 1; |
483
|
|
|
|
|
|
|
} |
484
|
|
|
|
|
|
|
$ret = 1 + $i; |
485
|
|
|
|
|
|
|
} else { # $n == -1 |
486
|
|
|
|
|
|
|
$ret = 1; |
487
|
|
|
|
|
|
|
} |
488
|
|
|
|
|
|
|
return $ret; |
489
|
|
|
|
|
|
|
} |
490
|
|
|
|
|
|
|
|
491
|
|
|
|
|
|
|
# |
492
|
|
|
|
|
|
|
# general purpose hexdump routine |
493
|
|
|
|
|
|
|
# |
494
|
|
|
|
|
|
|
sub hexdump { |
495
|
|
|
|
|
|
|
my ($self, $offset, $length, $limit) = @_; |
496
|
|
|
|
|
|
|
print(" 0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef\n"); |
497
|
|
|
|
|
|
|
my $dump_str = ''; |
498
|
|
|
|
|
|
|
my $i; |
499
|
|
|
|
|
|
|
if ($offset % 0x10) { |
500
|
|
|
|
|
|
|
printf("0x%08x ", $offset - ($offset % 0x10)); |
501
|
|
|
|
|
|
|
$dump_str = " " x ($offset % 0x10); |
502
|
|
|
|
|
|
|
} |
503
|
|
|
|
|
|
|
for ($i = 0; $i < $offset % 0x10; $i++) { |
504
|
|
|
|
|
|
|
if ($i == 0) { |
505
|
|
|
|
|
|
|
print ' '; |
506
|
|
|
|
|
|
|
} |
507
|
|
|
|
|
|
|
if ($i == 8) { |
508
|
|
|
|
|
|
|
print ' '; |
509
|
|
|
|
|
|
|
} |
510
|
|
|
|
|
|
|
print ' '; |
511
|
|
|
|
|
|
|
} |
512
|
|
|
|
|
|
|
for ($i = $offset ; $i < $offset + $length; $i++) { |
513
|
|
|
|
|
|
|
if ((defined($limit)) && ($i >= $offset + $limit)) { |
514
|
|
|
|
|
|
|
last; |
515
|
|
|
|
|
|
|
} |
516
|
|
|
|
|
|
|
if (($i % 0x10) == 0) { |
517
|
|
|
|
|
|
|
printf("0x%08x ", $i); |
518
|
|
|
|
|
|
|
} |
519
|
|
|
|
|
|
|
if ($i%0x10 == 8) { |
520
|
|
|
|
|
|
|
print ' '; |
521
|
|
|
|
|
|
|
} |
522
|
|
|
|
|
|
|
if ($i < length($self->_data)) { |
523
|
|
|
|
|
|
|
my $chr = substr($self->_data, $i, 1); |
524
|
|
|
|
|
|
|
my $value = ord($chr); |
525
|
|
|
|
|
|
|
if ((0x20 < $value) && ($value < 0x7f)) { # XXX: printable |
526
|
|
|
|
|
|
|
$dump_str .= $chr; |
527
|
|
|
|
|
|
|
} else { |
528
|
|
|
|
|
|
|
$dump_str .= ' '; |
529
|
|
|
|
|
|
|
} |
530
|
|
|
|
|
|
|
printf("%02x ", $value); |
531
|
|
|
|
|
|
|
} else { |
532
|
|
|
|
|
|
|
$dump_str .= ' '; |
533
|
|
|
|
|
|
|
print ' '; |
534
|
|
|
|
|
|
|
} |
535
|
|
|
|
|
|
|
if (($i % 0x10) == 0x0f) { |
536
|
|
|
|
|
|
|
print " "; |
537
|
|
|
|
|
|
|
print $dump_str; |
538
|
|
|
|
|
|
|
print "\n"; |
539
|
|
|
|
|
|
|
$dump_str = ''; |
540
|
|
|
|
|
|
|
} |
541
|
|
|
|
|
|
|
} |
542
|
|
|
|
|
|
|
if (($i % 0x10) != 0) { |
543
|
|
|
|
|
|
|
print ' ' x (3 * (0x10 - ($i % 0x10))); |
544
|
|
|
|
|
|
|
if ($i < 8) { |
545
|
|
|
|
|
|
|
print ' '; |
546
|
|
|
|
|
|
|
} |
547
|
|
|
|
|
|
|
print " "; |
548
|
|
|
|
|
|
|
print $dump_str; |
549
|
|
|
|
|
|
|
print "\n"; |
550
|
|
|
|
|
|
|
} |
551
|
|
|
|
|
|
|
if ((defined($limit)) && ($i >= $offset + $limit)) { |
552
|
|
|
|
|
|
|
print "...(truncated)...\n"; |
553
|
|
|
|
|
|
|
} |
554
|
|
|
|
|
|
|
} |
555
|
|
|
|
|
|
|
|
556
|
|
|
|
|
|
|
1; |
557
|
|
|
|
|
|
|
|
558
|
|
|
|
|
|
|
__END__ |