Class: BinTools::Reader

Inherits:
Object
  • Object
show all
Defined in:
lib/bin_tools/reader.rb

Overview

8 16 32 64 C S L Q - unsigned c s l q - unsigned < LE > BE A - binary string z - null terminated H - hex string

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(str) ⇒ Reader

Returns a new instance of Reader.



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# File 'lib/bin_tools/reader.rb', line 13

def initialize str
  @rom = str
  @cur = 0
  @base = 0
end

Class Method Details

.from_file(fn) ⇒ Object 



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# File 'lib/bin_tools/reader.rb', line 19

def self.from_file fn
  data = File.open(fn, "rb") { |io| io.read }
  self.new data
end

Instance Method Details

#msg(str) ⇒ Object 



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# File 'lib/bin_tools/reader.rb', line 148

def msg str
  puts "%08X(%08X): %s" % [@cur, tell, str]
end

#read_bin(len) ⇒ Object 



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# File 'lib/bin_tools/reader.rb', line 111

def read_bin len
  r = @rom[@cur..(@cur + len - 1)]
  @cur += len
  r
end

#read_binswap(len) ⇒ Object 



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# File 'lib/bin_tools/reader.rb', line 117

def read_binswap len
  togo = len
  bin_data = "".b
  while togo > 0
    r = @rom[@cur..(@cur + 3)].unpack('L>')
    bin_data += r.pack('L<')
    @cur += 4
    togo -= 4
  end
  bin_data
end

#read_bool ⇒ Object 



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# File 'lib/bin_tools/reader.rb', line 59

def read_bool
  read_byte == 1
end

#read_byte ⇒ Object 



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# File 'lib/bin_tools/reader.rb', line 53

def read_byte
  r = @rom[@cur].ord
  @cur += 1
  r
end

#read_f32_le ⇒ Object 



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# File 'lib/bin_tools/reader.rb', line 105

def read_f32_le
  r = @rom[@cur..(@cur + 3)].unpack('e').first
  @cur += 4
  r
end

#read_s16_le ⇒ Object 



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# File 'lib/bin_tools/reader.rb', line 75

def read_s16_le
  r = @rom[@cur..(@cur + 3)].unpack('s<').first
  @cur += 2
  r
end

#read_s32_le ⇒ Object 



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# File 'lib/bin_tools/reader.rb', line 93

def read_s32_le
  r = @rom[@cur..(@cur + 3)].unpack('l<').first
  @cur += 4
  r
end

#read_s8 ⇒ Object 



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# File 'lib/bin_tools/reader.rb', line 63

def read_s8
  r = @rom[@cur].unpack("c").first
  @cur += 1
  r
end

#read_str(len) ⇒ Object 



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# File 'lib/bin_tools/reader.rb', line 40

def read_str len
  r = @rom[@cur..(@cur + len - 1)].unpack("A#{len}").first
  @cur += len
  r
end

#read_str_varlen ⇒ Object 



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# File 'lib/bin_tools/reader.rb', line 46

def read_str_varlen
  len = read_varlen_le
  r = @rom[@cur..(@cur + len - 1)].unpack("A#{len}").first
  @cur += len
  r
end

#read_u16_be ⇒ Object 



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# File 'lib/bin_tools/reader.rb', line 81

def read_u16_be
  r = @rom[@cur..(@cur + 3)].unpack('S>').first
  @cur += 2
  r
end

#read_u16_le ⇒ Object 



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# File 'lib/bin_tools/reader.rb', line 69

def read_u16_le
  r = @rom[@cur..(@cur + 3)].unpack('S<').first
  @cur += 2
  r
end

#read_u32_be ⇒ Object 



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# File 'lib/bin_tools/reader.rb', line 99

def read_u32_be
  r = @rom[@cur..(@cur + 3)].unpack('L>').first
  @cur += 4
  r
end

#read_u32_le ⇒ Object 



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# File 'lib/bin_tools/reader.rb', line 87

def read_u32_le
  r = @rom[@cur..(@cur + 3)].unpack('L<').first
  @cur += 4
  r
end

#read_varlen_be ⇒ Object 



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# File 'lib/bin_tools/reader.rb', line 138

def read_varlen_be
  val = 0
  r = read_byte
  val = r & 0x7F
  return val if r < 0x80
  r = read_byte
  val = (val << 8) + r
  val
end

#read_varlen_le ⇒ Object 



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# File 'lib/bin_tools/reader.rb', line 129

def read_varlen_le
  val = 0
  r = read_byte
  val = r & 0x7F
  return val if r < 0x80
  r = read_byte << 7
  val + r
end

#seek(pos) ⇒ Object 



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# File 'lib/bin_tools/reader.rb', line 28

def seek pos
  @cur = pos + @base
end

#seek_rel(pos) ⇒ Object 



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# File 'lib/bin_tools/reader.rb', line 32

def seek_rel pos
  @cur += pos
end

#set_base(pos) ⇒ Object 



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# File 'lib/bin_tools/reader.rb', line 24

def set_base pos
  @base = pos
end

#tell ⇒ Object 



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# File 'lib/bin_tools/reader.rb', line 36

def tell
  @cur - @base
end