1 files changed, 89 insertions, 0 deletions
diff --git a/libjava/gnu/gcj/convert/Input_JavaSrc.java b/libjava/gnu/gcj/convert/Input_JavaSrc.java
new file mode 100644
index 000000000..12b8b695b
--- /dev/null
+++ b/libjava/gnu/gcj/convert/Input_JavaSrc.java
@@ -0,0 +1,89 @@
+/* Copyright (C) 1999  Free Software Foundation
+
+   This file is part of libgcj.
+
+This software is copyrighted work licensed under the terms of the
+Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
+details.  */
+
+package gnu.gcj.convert; 
+ 
+/**
+ * Convert Ascii with \ u XXXX-escapes to Unicode.
+ * @author Per Bothner <bothner@cygnus.com>
+ * @date April 1999.
+ */
+
+public class Input_JavaSrc extends BytesToUnicode
+{
+  public String getName() { return "JavaSrc"; }
+
+  // 0: normal
+  // 1: seen '\\'
+  // 2: seen '\\' and 'u'
+  // 3: seen '\\' and need to emit value.
+  // 4, 5, 6, 7:  seen '\\u', 'u' and (state-3) hex digits.
+  int state = 0;
+
+  int value;
+
+  public int read (char[] outbuffer, int outpos, int count)
+  {
+    int origpos = outpos;
+    for (;;)
+      {
+	if (inpos >= inlength)
+	  break;
+	if (outpos - origpos >= count)
+	  break;
+	char b = (char) (inbuffer[inpos++] & 0xFF);
+	switch (state)
+	  {
+	  case 0:
+	    if (b == '\\')
+	      {
+		state = 1;
+		continue;
+	      }
+	    break;
+	  case 1:
+	    if (b == 'u')
+	      {
+		state = 2;
+		continue;
+	      }
+	    if (b != '\\')
+	      {
+		value = b;
+		b = '\\';
+		state = 3;
+	      }
+	    break;
+	  case 3:
+	    b = (char) value;
+	    break;
+	  default:  //  case 4:  case 5:  case 6:  case 7:
+	    int digit = Character.digit(b, 16);
+	    if (digit < 0)
+	      {
+		b = '\uFFFD';
+		state = 0;
+	      }
+	    else
+	      {
+		value = value * 16 + digit;
+		if (state < 7)
+		  {
+		    state++;
+		    continue;
+		  }
+		b = (char) value;
+	      }
+	    state = 0;
+	  }
+	outbuffer[outpos++] = b;
+      }
+    return outpos - origpos;
+  }
+}
+