Class: Verneuil::Program

Inherits:
Object
  • Object
show all
Defined in:
lib/verneuil/program.rb

Overview

A program is a sequence of instructions that can be run inside a process. You can use the compiler (Verneuil::Compiler) to create programs.

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Program

Returns a new instance of Program.



13
14
15
16
 
# File 'lib/verneuil/program.rb', line 13

def initialize
  @instructions = []
  @symbols = Verneuil::SymbolTable.new
end

Instance Attribute Details

#instructions ⇒ Object (readonly)

Gives access to the internal array of instructions (the program memory)



9
10
11
 
# File 'lib/verneuil/program.rb', line 9

def instructions
  @instructions
end

#symbols ⇒ Object (readonly)

Access to the programs symbol table.



11
12
13
 
# File 'lib/verneuil/program.rb', line 11

def symbols
  @symbols
end

Instance Method Details

#==(program) ⇒ Object 



25
26
27
 
# File 'lib/verneuil/program.rb', line 25

def ==(program)
  instructions == program.instructions
end

#[](idx) ⇒ Object

Retrieves instruction at idx



31
32
33
 
# File 'lib/verneuil/program.rb', line 31

def [](idx)
  instructions[idx]
end

#add(instruction) ⇒ Object

Adds an instruction to the program. (at the end)



43
44
45
 
# File 'lib/verneuil/program.rb', line 43

def add(instruction)
  @instructions << instruction
end

#eql?(program) ⇒ Boolean

:nodoc:

Returns:

  • (Boolean) 


22
23
24
 
# File 'lib/verneuil/program.rb', line 22

def eql?(program) # :nodoc: 
  instructions.eql? program.instructions
end

#hash ⇒ Object

Make programs behave nicely with respect to comparison.



19
20
21
 
# File 'lib/verneuil/program.rb', line 19

def hash # :nodoc: 
  instructions.hash
end

#inspect ⇒ Object

Printing



49
50
51
52
53
54
55
56
57
58
59
60
 
# File 'lib/verneuil/program.rb', line 49

def inspect
  s = ''
  @instructions.each_with_index do |instruction, idx|
    method_label = ''
    if entry=symbols.methods.find { |(r,n), m| m.address.ip == idx }
      m = entry.last
      method_label = [m.receiver, m.name].inspect
    end
    s << sprintf("%20s %04d %s\n", method_label, idx, instruction)
  end
  s
end

#size ⇒ Object

Returns the size of the current program



37
38
39
 
# File 'lib/verneuil/program.rb', line 37

def size
  instructions.size
end