Class: BSON::ByteBuffer
- Inherits:
-
Object
- Object
- BSON::ByteBuffer
- Defined in:
- lib/bson/byte_buffer.rb
Direct Known Subclasses
Constant Summary collapse
- NULL_BYTE =
"\0"
- UTF8_ENCODING =
Encoding.find('utf-8')
- BINARY_ENCODING =
Encoding.find('binary')
Instance Attribute Summary collapse
-
#order ⇒ Object
Returns the value of attribute order.
Class Method Summary collapse
Instance Method Summary collapse
-
#append!(buffer) ⇒ Object
Appends a second ByteBuffer object,
buffer
, to the current buffer. - #clear ⇒ Object
- #dump ⇒ Object
- #get(len = nil) ⇒ Object
- #get_double ⇒ Object
- #get_int ⇒ Object
- #get_long ⇒ Object
-
#initialize(initial_data = "") ⇒ ByteBuffer
constructor
A new instance of ByteBuffer.
- #more? ⇒ Boolean
- #position ⇒ Object
- #position=(val) ⇒ Object
-
#prepend!(buffer) ⇒ Object
Prepends a second ByteBuffer object,
buffer
, to the current buffer. - #put(byte, offset = nil) ⇒ Object
- #put_array(array, offset = nil) ⇒ Object
- #put_binary(data, offset = nil) ⇒ Object
- #put_double(d, offset = nil) ⇒ Object
- #put_int(i, offset = nil) ⇒ Object
- #put_long(i, offset = nil) ⇒ Object
- #rewind ⇒ Object
- #size ⇒ Object (also: #length)
- #to_a ⇒ Object
- #to_s ⇒ Object
- #unpack(args) ⇒ Object
Constructor Details
#initialize(initial_data = "") ⇒ ByteBuffer
Returns a new instance of ByteBuffer.
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# File 'lib/bson/byte_buffer.rb', line 25 def initialize(initial_data="") @str = case initial_data when String then if initial_data.respond_to?(:force_encoding) initial_data.force_encoding('binary') else initial_data end when BSON::ByteBuffer then initial_data.to_a.pack('C*') else initial_data.pack('C*') end @cursor = @str.length @order = :little_endian @int_pack_order = 'V' @double_pack_order = 'E' end |
Instance Attribute Details
#order ⇒ Object
Returns the value of attribute order.
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# File 'lib/bson/byte_buffer.rb', line 23 def order @order end |
Class Method Details
.serialize_cstr(buf, val) ⇒ Object
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# File 'lib/bson/byte_buffer.rb', line 66 def self.serialize_cstr(buf, val) buf.append!(to_utf8_binary(val.to_s)) buf.append!(NULL_BYTE) end |
.to_utf8_binary(str) ⇒ Object
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# File 'lib/bson/byte_buffer.rb', line 50 def self.to_utf8_binary(str) str.encode(UTF8_ENCODING).force_encoding(BINARY_ENCODING) end |
Instance Method Details
#append!(buffer) ⇒ Object
Appends a second ByteBuffer object, buffer
, to the current buffer.
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# File 'lib/bson/byte_buffer.rb', line 102 def append!(buffer) @str << buffer.to_s self end |
#clear ⇒ Object
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# File 'lib/bson/byte_buffer.rb', line 90 def clear @str = "" @str.force_encoding('binary') if @str.respond_to?(:force_encoding) rewind end |
#dump ⇒ Object
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# File 'lib/bson/byte_buffer.rb', line 247 def dump i = 0 @str.each_byte do |c, i| $stderr.puts "#{'%04d' % i}: #{'%02x' % c} #{'%03o' % c} #{'%s' % c.chr} #{'%3d' % c}" i += 1 end end |
#get(len = nil) ⇒ Object
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# File 'lib/bson/byte_buffer.rb', line 180 def get(len=nil) one_byte = len.nil? len ||= 1 check_read_length(len) start = @cursor @cursor += len if one_byte @str[start] else @str[start, len].unpack("C*") end end |
#get_double ⇒ Object
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# File 'lib/bson/byte_buffer.rb', line 224 def get_double check_read_length(8) vals = @str[@cursor..@cursor+7] @cursor += 8 vals.unpack(@double_pack_order)[0] end |
#get_int ⇒ Object
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# File 'lib/bson/byte_buffer.rb', line 207 def get_int check_read_length(4) vals = @str[@cursor..@cursor+3] @cursor += 4 vals.unpack(@int_pack_order)[0] end |
#get_long ⇒ Object
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# File 'lib/bson/byte_buffer.rb', line 214 def get_long i1 = get_int i2 = get_int if @int_pack_order == 'N' (i1 << 32) + i2 else (i2 << 32) + i1 end end |
#more? ⇒ Boolean
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# File 'lib/bson/byte_buffer.rb', line 231 def more? @cursor < @str.size end |
#position ⇒ Object
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# File 'lib/bson/byte_buffer.rb', line 82 def position @cursor end |
#position=(val) ⇒ Object
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# File 'lib/bson/byte_buffer.rb', line 86 def position=(val) @cursor = val end |
#prepend!(buffer) ⇒ Object
Prepends a second ByteBuffer object, buffer
, to the current buffer.
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# File 'lib/bson/byte_buffer.rb', line 108 def prepend!(buffer) @str = buffer.to_s + @str self end |
#put(byte, offset = nil) ⇒ Object
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# File 'lib/bson/byte_buffer.rb', line 113 def put(byte, offset=nil) @cursor = offset if offset if more? @str[@cursor] = chr(byte) else ensure_length(@cursor) @str << chr(byte) end @cursor += 1 end |
#put_array(array, offset = nil) ⇒ Object
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# File 'lib/bson/byte_buffer.rb', line 138 def put_array(array, offset=nil) @cursor = offset if offset if more? @str[@cursor, array.length] = array.pack("C*") else ensure_length(@cursor) @str << array.pack("C*") end @cursor += array.length end |
#put_binary(data, offset = nil) ⇒ Object
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# File 'lib/bson/byte_buffer.rb', line 124 def put_binary(data, offset=nil) @cursor = offset if offset if defined?(BINARY_ENCODING) data = data.dup.force_encoding(BINARY_ENCODING) end if more? @str[@cursor, data.length] = data else ensure_length(@cursor) @str << data end @cursor += data.length end |
#put_double(d, offset = nil) ⇒ Object
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# File 'lib/bson/byte_buffer.rb', line 171 def put_double(d, offset=nil) a = [] [d].pack(@double_pack_order).each_byte { |b| a << b } put_array(a, offset) end |
#put_int(i, offset = nil) ⇒ Object
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# File 'lib/bson/byte_buffer.rb', line 149 def put_int(i, offset=nil) @cursor = offset if offset if more? @str[@cursor, 4] = [i].pack(@int_pack_order) else ensure_length(@cursor) @str << [i].pack(@int_pack_order) end @cursor += 4 end |
#put_long(i, offset = nil) ⇒ Object
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# File 'lib/bson/byte_buffer.rb', line 160 def put_long(i, offset=nil) offset = @cursor unless offset if @int_pack_order == 'N' put_int(i >> 32, offset) put_int(i & 0xffffffff, offset + 4) else put_int(i & 0xffffffff, offset) put_int(i >> 32, offset + 4) end end |
#rewind ⇒ Object
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# File 'lib/bson/byte_buffer.rb', line 78 def rewind @cursor = 0 end |
#size ⇒ Object Also known as: length
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# File 'lib/bson/byte_buffer.rb', line 96 def size @str.size end |
#to_a ⇒ Object
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# File 'lib/bson/byte_buffer.rb', line 235 def to_a @str.unpack("C*") end |
#to_s ⇒ Object
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# File 'lib/bson/byte_buffer.rb', line 243 def to_s @str end |
#unpack(args) ⇒ Object
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# File 'lib/bson/byte_buffer.rb', line 239 def unpack(args) to_a end |