1 files changed, 153 insertions, 0 deletions
diff --git a/lib/coderay/scanners/avrasm.rb b/lib/coderay/scanners/avrasm.rb
new file mode 100644
index 0000000..b3fc28d
--- /dev/null
+++ b/lib/coderay/scanners/avrasm.rb
@@ -0,0 +1,153 @@
+module CodeRay
+module Scanners
+
+  class AVRASM < Scanner
+
+    register_for :avrasm
+
+    RESERVED_WORDS = [
+    ]
+
+    PREDEFINED_TYPES = [
+    ]
+
+    PREDEFINED_CONSTANTS = [
+    ]
+
+    IDENT_KIND = CaseIgnoringWordList.new(:ident).
+      add(RESERVED_WORDS, :reserved).
+      add(PREDEFINED_TYPES, :pre_type).
+      add(PREDEFINED_CONSTANTS, :pre_constant)
+
+    ESCAPE = / [rbfnrtv\n\\'"] | x[a-fA-F0-9]{1,2} | [0-7]{1,3} /x
+    UNICODE_ESCAPE =  / u[a-fA-F0-9]{4} | U[a-fA-F0-9]{8} /x
+
+    def scan_tokens tokens, options
+
+      state = :initial
+
+      until eos?
+
+        kind = nil
+        match = nil
+
+        case state
+
+        when :initial
+
+          if scan(/ \s+ | \\\n /x)
+            kind = :space
+
+          elsif scan(/;.*/x)
+            kind = :comment
+
+          elsif scan(/\.(\w*)/x)
+            kind = :preprocessor
+            state = :include_expected if self[1] == 'include'
+          
+          elsif scan(/@[0-9]+/)
+            kind = :preprocessor
+
+          elsif scan(/ [-+*\/=<>?:;,!&^|()\[\]{}~%]+ | \.(?!\d) /x)
+            kind = :operator
+
+          elsif scan(/r[0-9]+/i)
+            # register R0-R31
+            kind = :pre_constant
+
+          elsif match = scan(/ [A-Za-z_][A-Za-z_0-9]* /x)
+            kind = IDENT_KIND[match]
+            if kind == :ident and check(/:(?!:)/)
+              match << scan(/:/)
+              kind = :label
+            end
+
+          elsif match = scan(/"/)
+            tokens << [:open, :string]
+            state = :string
+            kind = :delimiter
+
+          elsif scan(/ L?' (?: [^\'\n\\] | \\ #{ESCAPE} )? '? /ox)
+            kind = :char
+
+          elsif scan(/0[xX][0-9A-Fa-f]+/)
+            kind = :integer
+
+          elsif scan(/(?:0[0-7]+)(?![89.eEfF])/)
+            kind = :integer
+
+          elsif scan(/0[bB][0-9A-Fa-f]+/)
+            kind = :integer
+
+          elsif scan(/(?:\d+)(?![.eEfF])/)
+            kind = :integer
+
+          elsif scan(/\d[fF]?|\d*\.\d+(?:[eE][+-]?\d+)?[fF]?|\d+[eE][+-]?\d+[fF]?/)
+            kind = :float
+
+          else
+            getch
+            kind = :error
+
+          end
+
+        when :string
+          if scan(/[^\\\n"]+/)
+            kind = :content
+          elsif scan(/"/)
+            tokens << ['"', :delimiter]
+            tokens << [:close, :string]
+            state = :initial
+            next
+          elsif scan(/ \\ (?: #{ESCAPE} | #{UNICODE_ESCAPE} ) /mox)
+            kind = :char
+          elsif scan(/ \\ | $ /x)
+            tokens << [:close, :string]
+            kind = :error
+            state = :initial
+          else
+            raise_inspect "else case \" reached; %p not handled." % peek(1), tokens
+          end
+
+        when :include_expected
+          if scan(/<[^>\n]+>?|"[^"\n\\]*(?:\\.[^"\n\\]*)*"?/)
+            kind = :include
+            state = :initial
+
+          elsif match = scan(/\s+/)
+            kind = :space
+            state = :initial if match.index ?\n
+
+          else
+            getch
+            kind = :error
+
+          end
+
+        else
+          raise_inspect 'Unknown state', tokens
+
+        end
+
+        match ||= matched
+        if $DEBUG and not kind
+          raise_inspect 'Error token %p in line %d' %
+            [[match, kind], line], tokens
+        end
+        raise_inspect 'Empty token', tokens unless match
+
+        tokens << [match, kind]
+
+      end
+
+      if state == :string
+        tokens << [:close, :string]
+      end
+
+      tokens
+    end
+
+  end
+
+end
+end