Class: Aerospike::Buffer

Inherits:
Object
  • Object
show all
Defined in:
lib/aerospike/utils/buffer.rb

Overview

Buffer class to ease the work around

Constant Summary collapse

INT16 = 
"s>"
UINT16 = 
"n"
UINT16LE = 
"v"
INT32 = 
"l>"
UINT32 = 
"N"
INT64 = 
"q>"
UINT64 = 
"Q>"
UINT64LE = 
"Q"
DOUBLE = 
"G"
DEFAULT_BUFFER_SIZE = 
16 * 1024
MAX_BUFFER_SIZE = 
10 * 1024 * 1024
@@buf_pool =

:nodoc:

Pool.new

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(size = DEFAULT_BUFFER_SIZE, buf = nil) ⇒ Buffer

Returns a new instance of Buffer.



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# File 'lib/aerospike/utils/buffer.rb', line 45

def initialize(size = DEFAULT_BUFFER_SIZE, buf = nil)
  @buf = (buf ? buf : ("%0#{size}d" % 0))
  @buf.force_encoding("binary")
  @slice_end = @buf.bytesize
end

Instance Attribute Details

#buf ⇒ Object

Returns the value of attribute buf.



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# File 'lib/aerospike/utils/buffer.rb', line 30

def buf
  @buf
end

Class Method Details

.get ⇒ Object 



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# File 'lib/aerospike/utils/buffer.rb', line 51

def self.get
  @@buf_pool.poll
end

.put(buffer) ⇒ Object 



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# File 'lib/aerospike/utils/buffer.rb', line 55

def self.put(buffer)
  @@buf_pool.offer(buffer)
end

Instance Method Details

#dump(start = 0, finish = nil) ⇒ Object 



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# File 'lib/aerospike/utils/buffer.rb', line 210

def dump(start = 0, finish = nil)
  buf ||= @buf.bytes
  finish ||= @slice_end - 1
  width = 16

  ascii = "|"
  counter = 0

  print "%08x  " % start
  @buf.bytes[start...finish].each do |c|
    if counter >= start
      print "%02x " % c
      ascii << (c.between?(32, 126) ? c : ?.)
      print " " if ascii.length == (width / 2 + 1)
      if ascii.length > width
        ascii << "|"
        puts ascii
        ascii = "|"
        print "%08x  " % (counter + 1)
      end
    end
    counter += 1
  end

  # print the remainder in buffer
  if ascii.length.positive?
    fill_size = ((width - ascii.length + 1) * 3)
    fill_size += 1 if ascii.length <= (width / 2)
    filler = " " * fill_size
    print filler
    ascii << "|"
    puts ascii
  end
end

#eat!(n) ⇒ Object 



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# File 'lib/aerospike/utils/buffer.rb', line 65

def eat!(n)
  @buf.replace(@buf[n..-1])
end

#read(offset, len = nil) ⇒ Object 



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# File 'lib/aerospike/utils/buffer.rb', line 137

def read(offset, len = nil)
  if len
    @buf[offset, len]
  else
    @buf.getbyte(offset)
  end
end

#read_bool(offset, length) ⇒ Object 



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# File 'lib/aerospike/utils/buffer.rb', line 196

def read_bool(offset, length)
  length <= 0 ? false : @buf[offset].ord != 0
end

#read_double(offset) ⇒ Object 



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# File 'lib/aerospike/utils/buffer.rb', line 191

def read_double(offset)
  vals = @buf[offset..offset + 7]
  vals.unpack(DOUBLE)[0]
end

#read_int16(offset) ⇒ Object 



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# File 'lib/aerospike/utils/buffer.rb', line 145

def read_int16(offset)
  vals = @buf[offset..offset + 1]
  vals.unpack(INT16)[0]
end

#read_int32(offset) ⇒ Object 



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# File 'lib/aerospike/utils/buffer.rb', line 155

def read_int32(offset)
  vals = @buf[offset..offset + 3]
  vals.unpack(INT32)[0]
end

#read_int64(offset) ⇒ Object 



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# File 'lib/aerospike/utils/buffer.rb', line 165

def read_int64(offset)
  vals = @buf[offset..offset + 7]
  vals.unpack(INT64)[0]
end

#read_uint16(offset) ⇒ Object 



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# File 'lib/aerospike/utils/buffer.rb', line 150

def read_uint16(offset)
  vals = @buf[offset..offset + 1]
  vals.unpack(UINT16)[0]
end

#read_uint32(offset) ⇒ Object 



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# File 'lib/aerospike/utils/buffer.rb', line 160

def read_uint32(offset)
  vals = @buf[offset..offset + 3]
  vals.unpack(UINT32)[0]
end

#read_uint64(offset) ⇒ Object 



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# File 'lib/aerospike/utils/buffer.rb', line 175

def read_uint64(offset)
  vals = @buf[offset..offset + 7]
  vals.unpack(UINT64)[0]
end

#read_uint64_little_endian(offset) ⇒ Object 



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# File 'lib/aerospike/utils/buffer.rb', line 170

def read_uint64_little_endian(offset)
  vals = @buf[offset..offset + 7]
  vals.unpack(UINT64LE)[0]
end

#read_var_int64(offset, len) ⇒ Object 



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# File 'lib/aerospike/utils/buffer.rb', line 180

def read_var_int64(offset, len)
  val = 0
  i = 0
  while i < len
    val <<= 8
    val |= @buf[offset + i].ord & 0xFF
    i = i.succ
  end
  val
end

#reset ⇒ Object 



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# File 'lib/aerospike/utils/buffer.rb', line 204

def reset
  for i in 0..@buf.size - 1
    @buf[i] = " "
  end
end

#resize(length) ⇒ Object 



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# File 'lib/aerospike/utils/buffer.rb', line 69

def resize(length)
  # Corrupted data streams can result in a hug.length.
  # Do a sanity check here.
  if length > MAX_BUFFER_SIZE
    raise Aerospike::Exceptions::Parse.new("Invalid size for buffer: #{length}")
  end

  if @buf.bytesize < length
    @buf.concat("%0#{length - @buf.bytesize}d" % 0)
  end
  @slice_end = length
end

#size ⇒ Object Also known as: length 



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# File 'lib/aerospike/utils/buffer.rb', line 59

def size
  @buf.bytesize
end

#to_s ⇒ Object 



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# File 'lib/aerospike/utils/buffer.rb', line 200

def to_s
  @buf[0..@slice_end - 1]
end

#write_binary(data, offset) ⇒ Object 



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# File 'lib/aerospike/utils/buffer.rb', line 87

def write_binary(data, offset)
  @buf[offset, data.bytesize] = data
  data.bytesize
end

#write_byte(byte, offset) ⇒ Object 



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# File 'lib/aerospike/utils/buffer.rb', line 82

def write_byte(byte, offset)
  @buf.setbyte(offset, byte.ord)
  1
end

#write_double(f, offset) ⇒ Object 



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# File 'lib/aerospike/utils/buffer.rb', line 132

def write_double(f, offset)
  @buf[offset, 8] = [f].pack(DOUBLE)
  8
end

#write_int16(i, offset) ⇒ Object 



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# File 'lib/aerospike/utils/buffer.rb', line 92

def write_int16(i, offset)
  @buf[offset, 2] = [i].pack(INT16)
  2
end

#write_int32(i, offset) ⇒ Object 



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# File 'lib/aerospike/utils/buffer.rb', line 107

def write_int32(i, offset)
  @buf[offset, 4] = [i].pack(INT32)
  4
end

#write_int64(i, offset) ⇒ Object 



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# File 'lib/aerospike/utils/buffer.rb', line 117

def write_int64(i, offset)
  @buf[offset, 8] = [i].pack(INT64)
  8
end

#write_uint16(i, offset) ⇒ Object 



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# File 'lib/aerospike/utils/buffer.rb', line 97

def write_uint16(i, offset)
  @buf[offset, 2] = [i].pack(UINT16)
  2
end

#write_uint16_little_endian(i, offset) ⇒ Object 



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# File 'lib/aerospike/utils/buffer.rb', line 102

def write_uint16_little_endian(i, offset)
  @buf[offset, 2] = [i].pack(UINT16LE)
  2
end

#write_uint32(i, offset) ⇒ Object 



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# File 'lib/aerospike/utils/buffer.rb', line 112

def write_uint32(i, offset)
  @buf[offset, 4] = [i].pack(UINT32)
  4
end

#write_uint64(i, offset) ⇒ Object 



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# File 'lib/aerospike/utils/buffer.rb', line 122

def write_uint64(i, offset)
  @buf[offset, 8] = [i].pack(UINT64)
  8
end

#write_uint64_little_endian(i, offset) ⇒ Object 



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# File 'lib/aerospike/utils/buffer.rb', line 127

def write_uint64_little_endian(i, offset)
  @buf[offset, 8] = [i].pack(UINT64LE)
  8
end