moved from xml.Parsing.

1 files changed, 101 insertions, 0 deletions

diff --git a/sources/scala/xml/parsing/TokenTests.scala b/sources/scala/xml/parsing/TokenTests.scala
new file mode 100644
index 0000000000..8d95424d05
--- /dev/null
+++ b/sources/scala/xml/parsing/TokenTests.scala
@@ -0,0 +1,101 @@
+/*                     __                                               *\
+**     ________ ___   / /  ___     Scala API                            **
+**    / __/ __// _ | / /  / _ |    (c) 2003-2004, LAMP/EPFL             **
+**  __\ \/ /__/ __ |/ /__/ __ |                                         **
+** /____/\___/_/ |_/____/_/ | |                                         **
+**                          |/                                          **
+** $Id$
+\*                                                                      */
+package scala.xml.parsing ;
+
+/** helper functions for parsing XML fragments
+ */
+trait TokenTests {
+
+  /** (#x20 | #x9 | #xD | #xA) */
+  final def isSpace( ch:Char ):Boolean = ch match {
+    case '\u0009' | '\u000A' | '\u000D' | '\u0020' => true
+    case _                                         => false;
+  }
+
+  /** (#x20 | #x9 | #xD | #xA)+ */
+  final def isSpace( cs:Seq[Char] ):Boolean = {
+    val it = cs.elements;
+    it.hasNext && it.forall { isSpace };
+  }
+
+  /** NameChar ::= Letter | Digit | '.' | '-' | '_' | ':'
+   *             | CombiningChar | Extender
+   *
+   * see [4] and Appendix B of XML 1.0 specification
+  */
+  def isNameChar( ch:Char ) = isNameStart( ch ) || (ch match {
+    case '.' | '-' | ':' => true;
+    case _ => java.lang.Character.getType( ch ).asInstanceOf[Byte] match {
+      case java.lang.Character.COMBINING_SPACING_MARK => true; // Mc
+      case java.lang.Character.ENCLOSING_MARK => true;         // Me
+      case java.lang.Character.NON_SPACING_MARK => true;       // Mn
+      case java.lang.Character.MODIFIER_LETTER => true;        // Lm
+      case java.lang.Character.DECIMAL_DIGIT_NUMBER => true;   // Nd
+      case _ => false;
+    }
+  });
+
+  /** NameStart ::= ( Letter | '_' )
+   *  where Letter means in one of the Unicode general
+   *  categories { Ll, Lu, Lo, Lt, Nl }
+   *
+   *  We do not allow a name to start with ':'.
+   *  see [3] and Appendix B of XML 1.0 specification
+   */
+  def isNameStart( ch:Char ) =
+    java.lang.Character.getType( ch ).asInstanceOf[Byte] match {
+      case  java.lang.Character.LOWERCASE_LETTER => true;
+      case  java.lang.Character.UPPERCASE_LETTER => true;
+      case  java.lang.Character.OTHER_LETTER     => true;
+      case  java.lang.Character.TITLECASE_LETTER => true;
+      case  java.lang.Character.LETTER_NUMBER    => true;
+      case _ => ch match {
+        case '_' => true
+        case _ => false;
+      }
+    }
+
+  /** Name ::= ( Letter | '_' ) (NameChar)*
+   *
+   *  see  [5] of XML 1.0 specification
+   */
+  def isName( s:String ):boolean = {
+    if( s.length() > 0 ) {
+      val z:Seq[Char] = s;
+      val y           = z.elements;
+      if( isNameStart( y.next ) ) {
+        while( y.hasNext && isNameChar( y.next ) ) {};
+        !y.hasNext
+      } else false;
+    } else false;
+  }
+
+  def isPubIDChar( c:Char ) = c match {
+    case '\u0020' | '\u000D' | '\u000A' => true;
+    case _ if
+      ('0' < c && c < '9')||('a' < c && c < 'z')||('A' < c && c < 'Z') => true;
+    case '-' | '\''| '(' | ')' | '+' | ',' | '.' | '/' | ':'  | '=' |
+         '?' | ';' | '!' | '*' | '#' | '@' | '$' | '_' | '%'           => true
+    case _ => false;
+  }
+
+  def checkSysID( s:String ):boolean = {
+    s.indexOf('"') == -1 || s.indexOf('\'') == -1
+  }
+
+  def checkPubID( s:String ):boolean = {
+    if( s.length() > 0 ) {
+      val z:Seq[Char] = s;
+      val y = z.elements;
+      while( y.hasNext && isPubIDChar( y.next ) ){};
+      !y.hasNext
+    } else true
+  }
+
+}