/*
*
*
* Copyright 1990-2007 Sun Microsystems, Inc. All Rights Reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License version
* 2 only, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* General Public License version 2 for more details (a copy is
* included at /legal/license.txt).
*
* You should have received a copy of the GNU General Public License
* version 2 along with this work; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA
*
* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
* Clara, CA 95054 or visit www.sun.com if you need additional
* information or have any questions.
*/
package com.sun.midp.io.j2me.sms;
import java.io.ByteArrayOutputStream;
/**
* Text encoder and decoder for GSM 7-bit text and
* UCS-2 characters.
*/
public class TextEncoder {
/**
* GSM 7-bit character to UCS-2 mapping tables.
*/
protected static byte[] chars7Bit = {
0x00, // 0x0040, COMMERCIAL AT
0x01, // 0x00a3, POUND SIGN
0x02, // 0x0024, DOLLAR SIGN
0x03, // 0x00a5, YEN SIGN
0x04, // 0x00e8, LATIN SMALL LETTER E WITH GRAVE
0x05, // 0x00e9, LATIN SMALL LETTER E WITH ACUTE
0x06, // 0x00f9, LATIN SMALL LETTER U WITH GRAVE
0x07, // 0x00ec, LATIN SMALL LETTER I WITH GRAVE
0x08, // 0x00f2, LATIN SMALL LETTER O WITH GRAVE
0x09, // 0x00c7, LATIN CAPITAL LETTER C WITH CEDILLA
0x0a, // 0x000a, control: line feed
0x0b, // 0x00d8, LATIN CAPITAL LETTER O WITH STROKE
0x0c, // 0x00f8, LATIN SMALL LETTER O WITH STROKE
0x0d, // 0x000d, control: carriage return
0x0e, // 0x00c5, LATIN CAPITAL LETTER A WITH RING ABOVE
0x0f, // 0x00e5, LATIN SMALL LETTER A WITH RING ABOVE
0x10, // 0x0394, GREEK CAPITAL LETTER DELTA
0x11, // 0x005f, LOW LINE
0x12, // 0x03a6, GREEK CAPITAL LETTER PHI
0x13, // 0x0393, GREEK CAPITAL LETTER GAMMA
0x14, // 0x039b, GREEK CAPITAL LETTER LAMDA
0x15, // 0x03a9, GREEK CAPITAL LETTER OMEGA
0x16, // 0x03a0, GREEK CAPITAL LETTER PI
0x17, // 0x03a8, GREEK CAPITAL LETTER PSI
0x18, // 0x03a3, GREEK CAPITAL LETTER SIGMA
0x19, // 0x0398, GREEK CAPITAL LETTER THETA
0x1a, // 0x039e, GREEK CAPITAL LETTER XI
0x1b, // 0x001b, escape to extension table
0x1c, // 0x00c6, LATIN CAPITAL LETTER AE
0x1d, // 0x00e6, LATIN SMALL LETTER AE
0x1e, // 0x00df, LATIN SMALL LETTER SHARP S
0x1f, // 0x00c9, LATIN CAPITAL LETTER E WITH ACUTE
0x20, // 0x0020, SPACE
0x21, // 0x0021, EXCLAMATION MARK
0x22, // 0x0022, QUOTATION MARK
0x23, // 0x0023, NUMBER SIGN
0x24, // 0x00a4, CURRENCY SIGN
0x25, // 0x0025, PERCENT SIGN
0x26, // 0x0026, AMPERSAND
0x27, // 0x0027, APOSTROPHE
0x28, // 0x0028, LEFT PARENTHESIS
0x29, // 0x0029, RIGHT PARENTHESIS
0x2a, // 0x002a, ASTERISK
0x2b, // 0x002b, PLUS SIGN
0x2c, // 0x002c, COMMA
0x2d, // 0x002d, HYPHEN-MINUS
0x2e, // 0x002e, FULL STOP
0x2f, // 0x002f, SOLIDUS
0x30, // 0x0030, DIGIT ZERO
0x31, // 0x0031, DIGIT ONE
0x32, // 0x0032, DIGIT TWO
0x33, // 0x0033, DIGIT THREE
0x34, // 0x0034, DIGIT FOUR
0x35, // 0x0035, DIGIT FIVE
0x36, // 0x0036, DIGIT SIX
0x37, // 0x0037, DIGIT SEVEN
0x38, // 0x0038, DIGIT EIGHT
0x39, // 0x0039, DIGIT NINE
0x3a, // 0x003a, COLON
0x3b, // 0x003b, SEMICOLON
0x3c, // 0x003c, LESS-THAN SIGN
0x3d, // 0x003d, EQUALS SIGN
0x3e, // 0x003e, GREATER-THAN SIGN
0x3f, // 0x003f, QUESTION MARK
0x40, // 0x00a1, INVERTED EXCLAMATION MARK
0x41, // 0x0041, LATIN CAPITAL LETTER A
0x42, // 0x0042, LATIN CAPITAL LETTER B
0x43, // 0x0043, LATIN CAPITAL LETTER C
0x44, // 0x0044, LATIN CAPITAL LETTER D
0x45, // 0x0045, LATIN CAPITAL LETTER E
0x46, // 0x0046, LATIN CAPITAL LETTER F
0x47, // 0x0047, LATIN CAPITAL LETTER G
0x48, // 0x0048, LATIN CAPITAL LETTER H
0x49, // 0x0049, LATIN CAPITAL LETTER I
0x4a, // 0x004a, LATIN CAPITAL LETTER J
0x4b, // 0x004b, LATIN CAPITAL LETTER K
0x4c, // 0x004c, LATIN CAPITAL LETTER L
0x4d, // 0x004d, LATIN CAPITAL LETTER M
0x4e, // 0x004e, LATIN CAPITAL LETTER N
0x4f, // 0x004f, LATIN CAPITAL LETTER O
0x50, // 0x0050, LATIN CAPITAL LETTER P
0x51, // 0x0051, LATIN CAPITAL LETTER Q
0x52, // 0x0052, LATIN CAPITAL LETTER R
0x53, // 0x0053, LATIN CAPITAL LETTER S
0x54, // 0x0054, LATIN CAPITAL LETTER T
0x55, // 0x0055, LATIN CAPITAL LETTER U
0x56, // 0x0056, LATIN CAPITAL LETTER V
0x57, // 0x0057, LATIN CAPITAL LETTER W
0x58, // 0x0058, LATIN CAPITAL LETTER X
0x59, // 0x0059, LATIN CAPITAL LETTER Y
0x5a, // 0x005a, LATIN CAPITAL LETTER Z
0x5b, // 0x00c4, LATIN CAPITAL LETTER A WITH DIARESIS
0x5c, // 0x00d6, LATIN CAPITAL LETTER O WITH DIARESIS
0x5d, // 0x00d1, LATIN CAPITAL LETTER N WITH TILDE
0x5e, // 0x00dc, LATIN CAPITAL LETTER U WITH DIARESIS
0x5f, // 0x00a7, SECTION SIGN
0x60, // 0x00bf, INVERTED QUESTION MARK
0x61, // 0x0061, LATIN SMALL LETTER A
0x62, // 0x0062, LATIN SMALL LETTER B
0x63, // 0x0063, LATIN SMALL LETTER C
0x64, // 0x0064, LATIN SMALL LETTER D
0x65, // 0x0065, LATIN SMALL LETTER E
0x66, // 0x0066, LATIN SMALL LETTER F
0x67, // 0x0067, LATIN SMALL LETTER G
0x68, // 0x0068, LATIN SMALL LETTER H
0x69, // 0x0069, LATIN SMALL LETTER I
0x6a, // 0x006a, LATIN SMALL LETTER J
0x6b, // 0x006b, LATIN SMALL LETTER K
0x6c, // 0x006c, LATIN SMALL LETTER L
0x6d, // 0x006d, LATIN SMALL LETTER M
0x6e, // 0x006e, LATIN SMALL LETTER N
0x6f, // 0x006f, LATIN SMALL LETTER O
0x70, // 0x0070, LATIN SMALL LETTER P
0x71, // 0x0071, LATIN SMALL LETTER Q
0x72, // 0x0072, LATIN SMALL LETTER R
0x73, // 0x0073, LATIN SMALL LETTER S
0x74, // 0x0074, LATIN SMALL LETTER T
0x75, // 0x0075, LATIN SMALL LETTER U
0x76, // 0x0076, LATIN SMALL LETTER V
0x77, // 0x0077, LATIN SMALL LETTER W
0x78, // 0x0078, LATIN SMALL LETTER X
0x79, // 0x0079, LATIN SMALL LETTER Y
0x7a, // 0x007a, LATIN SMALL LETTER Z
0x7b, // 0x00e4, LATIN SMALL LETTER A WITH DIARESIS
0x7c, // 0x00f6, LATIN SMALL LETTER O WITH DIARESIS
0x7d, // 0x00f1, LATIN SMALL LETTER N WITH TILDE
0x7e, // 0x00fc, LATIN SMALL LETTER U WITH DIARESIS
0x7f // 0x00e0, LATIN SMALL LETTER A WITH GRAVE
/*
* The following are special case values encoded with an
* escaped sequence.
* 0x1b 0x14, // 0x005e, CIRCUMFLEX ACCENT
* 0x1b 0x28, // 0x007b, LEFT CURLY BRACKET
* 0x1b 0x29, // 0x007d, RIGHT CURLY BRACKET
* 0x1b 0x2f, // 0x005c, REVERSE SOLIDUS
* 0x1b 0x3c, // 0x005b, LEFT SQUARE BRACKET
* 0x1b 0x3d, // 0x007e, TILDE
* 0x1b 0x3e, // 0x005d, RIGHT SQUARE BRACKET
* 0x1b 0x40, // 0x007c, VERTICAL LINE
* 0x1b 0x65, // 0x20ac, EURO SIGN
*/
};
/**
* GSM 7-bit escaped character to UCS-2 mapping tables.
*/
protected static byte[] escaped7BitChars = {
0x14, // 0x005e, CIRCUMFLEX ACCENT
0x28, // 0x007b, LEFT CURLY BRACKET
0x29, // 0x007d, RIGHT CURLY BRACKET
0x2f, // 0x005c, REVERSE SOLIDUS
0x3c, // 0x005b, LEFT SQUARE BRACKET
0x3d, // 0x007e, TILDE
0x3e, // 0x005d, RIGHT SQUARE BRACKET
0x40, // 0x007c, VERTICAL LINE
0x65 // 0x20ac, EURO SIGN
};
/**
* GSM UCS-2 mapping tables.
*/
protected static char[] charsUCS2 = {
0x0040, // COMMERCIAL AT
0x00a3, // POUND SIGN
0x0024, // DOLLAR SIGN
0x00a5, // YEN SIGN
0x00e8, // LATIN SMALL LETTER E WITH GRAVE
0x00e9, // LATIN SMALL LETTER E WITH ACUTE
0x00f9, // LATIN SMALL LETTER U WITH GRAVE
0x00ec, // LATIN SMALL LETTER I WITH GRAVE
0x00f2, // LATIN SMALL LETTER O WITH GRAVE
0x00c7, // LATIN CAPITAL LETTER C WITH CEDILLA
0x000a, // control: line feed
0x00d8, // LATIN CAPITAL LETTER O WITH STROKE
0x00f8, // LATIN SMALL LETTER O WITH STROKE
0x000d, // control: carriage return
0x00c5, // LATIN CAPITAL LETTER A WITH RING ABOVE
0x00e5, // LATIN SMALL LETTER A WITH RING ABOVE
0x0394, // GREEK CAPITAL LETTER DELTA
0x005f, // LOW LINE
0x03a6, // GREEK CAPITAL LETTER PHI
0x0393, // GREEK CAPITAL LETTER GAMMA
0x039b, // GREEK CAPITAL LETTER LAMDA
0x03a9, // GREEK CAPITAL LETTER OMEGA
0x03a0, // GREEK CAPITAL LETTER PI
0x03a8, // GREEK CAPITAL LETTER PSI
0x03a3, // GREEK CAPITAL LETTER SIGMA
0x0398, // GREEK CAPITAL LETTER THETA
0x039e, // GREEK CAPITAL LETTER XI
0x001b, // escape to extension table
0x00c6, // LATIN CAPITAL LETTER AE
0x00e6, // LATIN SMALL LETTER AE
0x00df, // LATIN SMALL LETTER SHARP S
0x00c9, // LATIN CAPITAL LETTER E WITH ACUTE
0x0020, // SPACE
0x0021, // EXCLAMATION MARK
0x0022, // QUOTATION MARK
0x0023, // NUMBER SIGN
0x00a4, // CURRENCY SIGN
0x0025, // PERCENT SIGN
0x0026, // AMPERSAND
0x0027, // APOSTROPHE
0x0028, // LEFT PARENTHESIS
0x0029, // RIGHT PARENTHESIS
0x002a, // ASTERISK
0x002b, // PLUS SIGN
0x002c, // COMMA
0x002d, // HYPHEN-MINUS
0x002e, // FULL STOP
0x002f, // SOLIDUS
0x0030, // DIGIT ZERO
0x0031, // DIGIT ONE
0x0032, // DIGIT TWO
0x0033, // DIGIT THREE
0x0034, // DIGIT FOUR
0x0035, // DIGIT FIVE
0x0036, // DIGIT SIX
0x0037, // DIGIT SEVEN
0x0038, // DIGIT EIGHT
0x0039, // DIGIT NINE
0x003a, // COLON
0x003b, // SEMICOLON
0x003c, // LESS-THAN SIGN
0x003d, // EQUALS SIGN
0x003e, // GREATER-THAN SIGN
0x003f, // QUESTION MARK
0x00a1, // INVERTED EXCLAMATION MARK
0x0041, // LATIN CAPITAL LETTER A
0x0042, // LATIN CAPITAL LETTER B
0x0043, // LATIN CAPITAL LETTER C
0x0044, // LATIN CAPITAL LETTER D
0x0045, // LATIN CAPITAL LETTER E
0x0046, // LATIN CAPITAL LETTER F
0x0047, // LATIN CAPITAL LETTER G
0x0048, // LATIN CAPITAL LETTER H
0x0049, // LATIN CAPITAL LETTER I
0x004a, // LATIN CAPITAL LETTER J
0x004b, // LATIN CAPITAL LETTER K
0x004c, // LATIN CAPITAL LETTER L
0x004d, // LATIN CAPITAL LETTER M
0x004e, // LATIN CAPITAL LETTER N
0x004f, // LATIN CAPITAL LETTER O
0x0050, // LATIN CAPITAL LETTER P
0x0051, // LATIN CAPITAL LETTER Q
0x0052, // LATIN CAPITAL LETTER R
0x0053, // LATIN CAPITAL LETTER S
0x0054, // LATIN CAPITAL LETTER T
0x0055, // LATIN CAPITAL LETTER U
0x0056, // LATIN CAPITAL LETTER V
0x0057, // LATIN CAPITAL LETTER W
0x0058, // LATIN CAPITAL LETTER X
0x0059, // LATIN CAPITAL LETTER Y
0x005a, // LATIN CAPITAL LETTER Z
0x00c4, // LATIN CAPITAL LETTER A WITH DIARESIS
0x00d6, // LATIN CAPITAL LETTER O WITH DIARESIS
0x00d1, // LATIN CAPITAL LETTER N WITH TILDE
0x00dc, // LATIN CAPITAL LETTER U WITH DIARESIS
0x00a7, // SECTION SIGN
0x00bf, // INVERTED QUESTION MARK
0x0061, // LATIN SMALL LETTER A
0x0062, // LATIN SMALL LETTER B
0x0063, // LATIN SMALL LETTER C
0x0064, // LATIN SMALL LETTER D
0x0065, // LATIN SMALL LETTER E
0x0066, // LATIN SMALL LETTER F
0x0067, // LATIN SMALL LETTER G
0x0068, // LATIN SMALL LETTER H
0x0069, // LATIN SMALL LETTER I
0x006a, // LATIN SMALL LETTER J
0x006b, // LATIN SMALL LETTER K
0x006c, // LATIN SMALL LETTER L
0x006d, // LATIN SMALL LETTER M
0x006e, // LATIN SMALL LETTER N
0x006f, // LATIN SMALL LETTER O
0x0070, // LATIN SMALL LETTER P
0x0071, // LATIN SMALL LETTER Q
0x0072, // LATIN SMALL LETTER R
0x0073, // LATIN SMALL LETTER S
0x0074, // LATIN SMALL LETTER T
0x0075, // LATIN SMALL LETTER U
0x0076, // LATIN SMALL LETTER V
0x0077, // LATIN SMALL LETTER W
0x0078, // LATIN SMALL LETTER X
0x0079, // LATIN SMALL LETTER Y
0x007a, // LATIN SMALL LETTER Z
0x00e4, // LATIN SMALL LETTER A WITH DIARESIS
0x00f6, // LATIN SMALL LETTER O WITH DIARESIS
0x00f1, // LATIN SMALL LETTER N WITH TILDE
0x00fc, // LATIN SMALL LETTER U WITH DIARESIS
0x00e0 // LATIN SMALL LETTER A WITH GRAVE
};
/**
* GSM escaped character UCS-2 mapping tables.
*/
protected static char[] escapedUCS2 = {
0x005e, // CIRCUMFLEX ACCENT
0x007b, // LEFT CURLY BRACKET
0x007d, // RIGHT CURLY BRACKET
0x005c, // REVERSE SOLIDUS
0x005b, // LEFT SQUARE BRACKET
0x007e, // TILDE
0x005d, // RIGHT SQUARE BRACKET
0x007c, // VERTICAL LINE
0x20ac // EURO SIGN
};
/**
* Converts a UCS-2 character array into GSM 7-bit bytes.
*
* @param ucsbytes an array of UCS-2 characters in a byte array
* @return array of GSM 7-bit bytes if the conversion was
* successful, otherwise return <code>null</code> to
* indicate that some UCS-2 values were included that can
* not be translated to the GSM 7-bit format
*/
public static byte[] encode(byte[] ucsbytes) {
/*
* Initialize a buffer with expected size twice that of
* the 7-bit encoded text.
*/
ByteArrayOutputStream bos = new ByteArrayOutputStream(ucsbytes.length);
/*
* Walk through the UCS 2 characters 2 bytes at a time.
* All characters must be in the direct or extended UCS
* character tables. If not we reject the entire conversion.
*/
for (int i = 0; i < ucsbytes.length; i += 2) {
int j;
for (j = 0; j < charsUCS2.length; j++) {
if (ucsbytes[i] == (charsUCS2[j] >> 8) &&
ucsbytes[i+1] == (charsUCS2[j] & 0xFF)) {
bos.write(chars7Bit[j]);
break;
}
}
/*
* If you get to the end of the basic character table,
* check the extra escaped sequence table, too.
*/
if (j == charsUCS2.length) {
int k;
for (k = 0; k < escapedUCS2.length; k++) {
if (ucsbytes[i] == (escapedUCS2[k] >> 8) &&
ucsbytes[i+1] == (escapedUCS2[k] & 0xFF)) {
bos.write(0x1b);
bos.write(escaped7BitChars[k]);
break;
}
}
/*
* If no match is found in either table,
* return null to indicate UCS 2 characters
* were found that are not included in the
* GSM 7 bit encoding.
*/
if (k == escapedUCS2.length) {
return null;
}
}
}
return bos.toByteArray();
}
/**
* Converts a GSM 7-bit encoded byte array into a UCS-2 byte array.
*
* @param gsm7bytes an array of GSM 7-bit encoded characters
* @return an array of UCS-2 characters in a byte array
*/
public static byte[] decode(byte[] gsm7bytes) {
/*
* Initialize a buffer with expected size twice that of
* the 7-bit encoded text
*/
ByteArrayOutputStream bos =
new ByteArrayOutputStream(gsm7bytes.length * 2);
for (int i = 0; i < gsm7bytes.length; i++) {
/*
* Check for escaped characters first.
*/
if (gsm7bytes[i] == 0x1b) {
/*
* Advance the pointer past the escape.
*/
i++;
for (int j = 0; j < escaped7BitChars.length; j++) {
if (gsm7bytes[i] == escaped7BitChars[j]) {
bos.write(escapedUCS2[j] >> 8);
bos.write(escapedUCS2[j] & 0xFF);
break;
}
}
} else {
for (int j = 0; j < chars7Bit.length; j++) {
if (gsm7bytes[i] == chars7Bit[j]) {
bos.write(charsUCS2[j] >> 8);
bos.write(charsUCS2[j] & 0xFF);
break;
}
}
}
}
return bos.toByteArray();
}
/**
* Gets a <code>String</code> from the UCS-2 byte array.
* @param ucsbytes an array of UCS-2 characters as a byte array
* @return Java string
*/
public static String toString(byte[] ucsbytes) {
char[] c = new char [ucsbytes.length/2];
/*
* Create a string from the raw UCS 2 bytes.
*/
for (int i = 0; i < ucsbytes.length; i += 2) {
c[i/2] = (char)((ucsbytes[i] << 8)
+ (ucsbytes[i+1] & 0xFF));
}
return new String(c);
}
/**
* Converts a string to a UCS-2 byte array.
*
* @param data a String to be converted
* @return an array of bytes in UCS-2 character
*/
public static byte[] toByteArray(String data) {
char[] c = data.toCharArray();
ByteArrayOutputStream bos =
new ByteArrayOutputStream(data.length());
for (int i = 0; i < c.length; i ++) {
bos.write(c[i] >> 8);
bos.write(c[i] & 0xFF);
}
return bos.toByteArray();
}
}
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