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/* __ *\
** ________ ___ / / ___ Scala API **
** / __/ __// _ | / / / _ | (c) 2003-2006, 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 y = s.elements;
if (isNameStart(y.next)) {
while (y.hasNext && isNameChar(y.next)) {};
!y.hasNext
} else false;
} else false;
}
def isPubIDChar(ch: Char): Boolean = {
//Console.println("char: '" + ch + "'");
ch match {
case '\u0020' | '\u000D' | '\u000A' => true;
case _ if
(('0' <= ch && ch <= '9') || ('a' <= ch && ch <= 'z') ||
('A' <= ch && ch <= 'Z')) => true;
case '-' | '\''| '(' | ')' | '+' | ',' | '.' |
'/' | ':' | '=' | '?' | ';' | '!' | '*' |
'#' | '@' | '$' | '_' | '%' => true
case _ =>
//Console.println("false: '" + ch + "'");
false;
}
}
/**
* Returns true if the encoding name is a valid IANA encoding.
* This method does not verify that there is a decoder available
* for this encoding, only that the characters are valid for an
* IANA encoding name.
*
* @param ianaEncoding The IANA encoding name.
*/
def isValidIANAEncoding(ianaEncoding: Seq[Char]): Boolean = {
val it = ianaEncoding.elements;
if (!it.hasNext)
return false;
var c = it.next;
if ((c >= 'A' && c <= 'Z') || (c >= 'a' && c <= 'z')) {
while (it.hasNext) {
c = it.next;
if ((c < 'A' || c > 'Z') && (c < 'a' || c > 'z') &&
(c < '0' || c > '9') && c != '.' && c != '_' &&
c != '-') {
return false;
}
}
return true;
} else
return false;
} // isValidIANAEncoding(String): Boolean
def checkSysID( s:String ): Boolean = {
s.indexOf('"'.asInstanceOf[Int]) == -1 || s.indexOf('\''.asInstanceOf[Int]) == -1
}
def checkPubID(s: String): Boolean = {
//Console.println("checkPubID of \""+s+"\"");
if (s.length() > 0) {
val y = s.elements;
var c = ' ';
while (y.hasNext && isPubIDChar(c)) {
//Console.println(c);
c = y.next
};
!y.hasNext
}
else
true
}
}
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