CLDC changes

1 files changed, 249 insertions, 0 deletions

diff --git a/bundles/org.eclipse.swt/Eclipse SWT/common_j2me/org/eclipse/swt/internal/Compatibility.java b/bundles/org.eclipse.swt/Eclipse SWT/common_j2me/org/eclipse/swt/internal/Compatibility.java
new file mode 100644
index 0000000000..52f8923b88
--- /dev/null
+++ b/bundles/org.eclipse.swt/Eclipse SWT/common_j2me/org/eclipse/swt/internal/Compatibility.java
@@ -0,0 +1,249 @@
+package org.eclipse.swt.internal;

+

+import org.eclipse.swt.SWT;

+import java.io.*;

+

+/**

+ * This class is a placeholder for utility methods commonly

+ * used on J2SE platforms but not supported on some J2ME

+ * profiles.

+ * <p>

+ * It is part of our effort to provide support for both J2SE

+ * and J2ME platforms.

+ * </p>

+ * <p>

+ * IMPORTANT: some of the methods have been modified from their

+ * J2SE parents. For example, exceptions thrown may differ since

+ * J2ME's set of exceptions is a subset of J2SE's one. Refer to

+ * the description of each method for specific changes.

+ * </p>

+ */

+public final class Compatibility {

+

+/**

+ * Answers the most negative (i.e. closest to negative infinity)

+ * integer value which is greater than the given rational number.

+ * 

+ * @param p the numerator of the rational number

+ * @param q the denominator of the rational number (must be different from zero)

+ * @return the ceiling of the rational number.

+ */

+public static int ceil(int p, int q) {

+	int res = p / q;

+	if ((p % q == 0) || 

+		(res < 0) ||

+		((res == 0) && ((p < 0 && q > 0) || (p > 0 && q < 0))))

+		return res;

+	else

+		return res + 1;

+}

+

+/**

+ * Returns 2 raised to the power of the argument.

+ *

+ * @param n an int value between 0 and 30 (inclusive)

+ * @return 2 raised to the power of the argument

+ *

+ * @exception IllegalArgumentException <ul>

+ *    <li>ERROR_INVALID_RANGE - if the argument is not between 0 and 30 (inclusive)</li>

+ * </ul>

+ */

+public static int pow2(int n) {

+	if (n >= 1 && n <= 30)

+		return 2 << (n - 1);

+	else if (n != 0) {

+		SWT.error(SWT.ERROR_INVALID_RANGE);

+	}

+	return 1;

+}

+

+/**

+ * Loads a library if the underlying platform supports this.

+ * If not, it is assumed that the library in question was 

+ * properly made available in some other fashion.

+ *

+ * @param name the name of the library to load

+ * 

+ * @exception SecurityException

+ *   if the library was not allowed to be loaded

+ * @exception SWTError <ul>

+ *    <li>ERROR_FAILED_LOAD_LIBRARY - if the library could not be loaded</li>

+ * </ul>

+ */

+public static void loadLibrary(String name) {

+}

+

+/**

+ * Open a file if such things are supported.

+ * 

+ * @param filename the name of the file to open

+ * @return a stream on the file if it could be opened.

+ */

+public static InputStream newFileInputStream (String filename) throws IOException {

+	throw new IOException();

+}

+

+/**

+ * Open a file if such things are supported.

+ * 

+ * @param filename the name of the file to open

+ * @return a stream on the file if it could be opened.

+ */

+public static OutputStream newFileOutputStream (String filename) throws IOException {

+	throw new IOException();

+}

+

+/**

+ * Answers whether the character is a letter.

+ *

+ * @param c the character

+ * @return true when the character is a letter

+ */

+public static boolean isLetter(char c) {

+	return (Character.isUpperCase(c)) || (Character.isLowerCase(c));

+}

+

+/**

+ * Answers whether the character is a letter or a digit.

+ *

+ * @param c the character

+ * @return true when the character is a letter or a digit

+ */

+public static boolean isLetterOrDigit(char c) {

+	return isLetter(c) || Character.isDigit(c);

+}

+

+/**

+ * Answers whether the character is a Unicode space character.

+ *

+ * @param c	 the character

+ * @return true when the character is a Unicode space character

+ */

+public static boolean isSpaceChar(char c) {

+	return c == ' ';

+}

+

+/**

+ * Answers whether the character is whitespace character.

+ *

+ * @param c the character

+ * @return true when the character is a whitespace character

+ */

+public static boolean isWhitespace(char c) {

+	// Optimized case for ASCII

+	if ((c >= 0x1c && c <= 0x20) || (c >= 0x9 && c <= 0xd)) 

+		return true;

+	return false;

+}

+

+/**

+ * Execute a program in a separate platform process if the

+ * underlying platform support this.

+ * <p>

+ * The new process inherits the environment of the caller.

+ * </p>

+ *

+ * @param program the name of the program to execute

+ *

+ * @exception IOException

+ *  if the program cannot be executed

+ * @exception SecurityException

+ *  if the current SecurityManager disallows program execution

+ */

+public static void exec(String prog) throws java.io.IOException {

+	throw new IOException();

+}

+

+/**

+ * Execute progArray[0] in a separate platform process if the

+ * underlying platform support this.

+ * <p>

+ * The new process inherits the environment of the caller.

+ * <p>

+ *

+ * @param progArray array containing the program to execute and its arguments

+ *

+ * @exception IOException

+ *  if the program cannot be executed

+ * @exception	SecurityException

+ *  if the current SecurityManager disallows program execution

+ */

+public static void exec(String[] progArray) throws java.io.IOException{

+	throw new IOException();

+}

+

+/**

+ * Returns the NLS'ed message for the given argument. This is only being

+ * called from SWT.

+ * 

+ * @param key the key to look up

+ * @return the message for the given key

+ * 

+ * @see SWT#getMessage

+ */

+public static String getMessage(String key) {

+	String answer = key;

+	

+	if (key == null)

+		SWT.error (SWT.ERROR_NULL_ARGUMENT);	

+	if (key.equals( "SWT_Yes"))

+		return "Yes";

+	if (key.equals("SWT_No"))

+		return "No";

+	if (key.equals("SWT_OK")) 

+		return "OK";

+	if (key.equals("SWT_Cancel"))

+	 	return "Cancel";

+	if (key.equals("SWT_Abort"))

+	 	return "Abort";

+	if (key.equals("SWT_Retry"))

+	 	return "Retry";

+	if (key.equals("SWT_Ignore"))

+	 	return "Ignore";

+	if (key.equals("SWT_Sample"))

+	 	return "Sample";

+	if (key.equals("SWT_A_Sample_Text"))

+	 	return "A Sample Text";

+	if (key.equals("SWT_Selection"))

+	 	return "Selection";

+	if (key.equals("SWT_Current_Selection"))

+	 	return "Current Selection";

+	if (key.equals("SWT_Character_set"))

+	 	return "Character set";

+	if (key.equals("SWT_Font"))

+	 	return "Font";

+	if (key.equals("SWT_Extended_style"))

+	 	return "Extended style";

+	if (key.equals("SWT_Size"))

+	 	return "Size";

+	if (key.equals("SWT_Style"))

+	 	return "Style";

+	 	

+	return key;

+}

+	

+/**

+ * Interrupt the current thread. 

+ * <p>

+ * Note that this is not available on CLDC.

+ * </p>

+ */

+public static void interrupt() {

+}

+

+/**

+ * Copies a range of characters into a new String.

+ *

+ * @param buffer the StringBuffer we want to copy from

+ * @param start the offset of the first character

+ * @param end the offset one past the last character

+ * @return a new String containing the characters from start to end - 1

+ *

+ * @exception	IndexOutOfBoundsException 

+ *   when <code>start < 0, start > end</code> or <code>end > length()</code>

+ */

+public static String substring(StringBuffer buffer, int start, int end) {

+	return buffer.toString().substring(start, end);

+}

+

+}