[macruby-changes] [2238] MacRuby/trunk/lib/stringio.rb

[source_changes at macosforge.org]

Revision: 2238
          http://trac.macosforge.org/projects/ruby/changeset/2238
Author:   mattaimonetti at gmail.com
Date:     2009-08-05 23:18:25 -0700 (Wed, 05 Aug 2009)
Log Message:
-----------
added getc and ungetc to StringIO

Modified Paths:
--------------
    MacRuby/trunk/lib/stringio.rb

Modified: MacRuby/trunk/lib/stringio.rb
===================================================================
--- MacRuby/trunk/lib/stringio.rb	2009-08-06 03:50:44 UTC (rev 2237)
+++ MacRuby/trunk/lib/stringio.rb	2009-08-06 06:18:25 UTC (rev 2238)
@@ -225,7 +225,82 @@
   
   def fsync
     0
-  end            
+  end
+  
+  #   strio.sync    -> true
+  #
+  # Returns +true+ always.
+  #
+  def sync
+    true
+  end
+  
+  #    strio.sync = boolean -> boolean
+  #
+  def sync=(value)
+    value
+  end
+  
+  def tell
+    @pos
+  end 
+  
+  #   strio.getc   -> string or nil
+  #
+  # Gets the next character from io.
+  # Returns nil if called at end of file
+  def getc
+    return nil if eof?
+    @pos += 1
+    @string[@pos]
+  end
+    
+  #   strio.ungetc(string)   -> nil
+  #
+  # Pushes back one character (passed as a parameter) onto *strio*
+  # such that a subsequent buffered read will return it.  Pushing back 
+  # behind the beginning of the buffer string is not possible.  Nothing
+  # will be done if such an attempt is made.
+  # In other case, there is no limitation for multiple pushbacks.
+  #
+  def ungetc(chars)
+    raise(IOError, "not opened for reading") unless @readable
+    unless chars.kind_of?(Integer)
+      raise TypeError unless chars.respond_to?(:to_str)
+      chars = chars.to_str
+    end
+    
+    if pos == 0
+      @string = chars + @string    
+    elsif pos > 0
+      @pos -= 1
+      string[pos] = chars      
+    end    
+        
+    nil
+  end
+  
+  #   strio.readchar   -> fixnum
+  #
+  # See IO#readchar.
+  #
+  def readchar
+    
+  end
+  
+  #   strio.getbyte   -> fixnum or nil
+  #
+  # See IO#getbyte.
+  def get_byte
+  end
+  
+  #   strio.each_byte {|byte| block }  -> strio
+  #
+  # See IO#each_byte.
+  #
+  def each_byte
+  end 
+           
 
 
   protected 
@@ -295,4 +370,4 @@
       @string.replace("") if (mode & IO::TRUNC) != 0
     end
 
-end    
\ No newline at end of file
+end
\ No newline at end of file
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