Implement Code

Author: leocassarani

lib/code.rb

@@ -1,2 +1,62 @@
 module Code
+  module_function
+
+  def dest(mnemonic)
+    {
+      ''    => '000',
+      'M'   => '001',
+      'D'   => '010',
+      'MD'  => '011',
+      'A'   => '100',
+      'AM'  => '101',
+      'AD'  => '110',
+      'AMD' => '111'
+    }.fetch(mnemonic)
+  end
+
+  def comp(mnemonic)
+    {
+      '0'   => '0101010',
+      '1'   => '0111111',
+      '-1'  => '0111010',
+      'D'   => '0001100',
+      'A'   => '0110000',
+      '!D'  => '0001101',
+      '!A'  => '0110001',
+      '-D'  => '0001111',
+      '-A'  => '0110011',
+      'D+1' => '0011111',
+      'A+1' => '0110111',
+      'D-1' => '0001110',
+      'A-1' => '0110010',
+      'D+A' => '0000010',
+      'D-A' => '0010011',
+      'A-D' => '0000111',
+      'D&A' => '0000000',
+      'D|A' => '0010101',
+      'M'   => '1110000',
+      '!M'  => '1110001',
+      '-M'  => '1110011',
+      'M+1' => '1110111',
+      'M-1' => '1110010',
+      'D+M' => '1000010',
+      'D-M' => '1010011',
+      'M-D' => '1000111',
+      'D&M' => '1000000',
+      'D|M' => '1010101'
+    }.fetch(mnemonic)
+  end
+
+  def jump(mnemonic)
+    {
+      ''    => '000',
+      'JGT' => '001',
+      'JEQ' => '010',
+      'JGE' => '011',
+      'JLT' => '100',
+      'JNE' => '101',
+      'JLE' => '110',
+      'JMP' => '111'
+    }.fetch(mnemonic)
+  end
 end