01: /*
02: * Copyright (c) 2007, intarsys consulting GmbH
03: *
04: * Redistribution and use in source and binary forms, with or without
05: * modification, are permitted provided that the following conditions are met:
06: *
07: * - Redistributions of source code must retain the above copyright notice,
08: * this list of conditions and the following disclaimer.
09: *
10: * - Redistributions in binary form must reproduce the above copyright notice,
11: * this list of conditions and the following disclaimer in the documentation
12: * and/or other materials provided with the distribution.
13: *
14: * - Neither the name of intarsys nor the names of its contributors may be used
15: * to endorse or promote products derived from this software without specific
16: * prior written permission.
17: *
18: * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
19: * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
20: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
21: * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
22: * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
23: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
24: * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
25: * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
26: * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
27: * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
28: * POSSIBILITY OF SUCH DAMAGE.
29: */
30: package de.intarsys.pdf.font;
31:
32: import de.intarsys.pdf.cos.COSBasedObject;
33: import de.intarsys.pdf.cos.COSName;
34: import de.intarsys.pdf.cos.COSObject;
35:
36: /**
37: * A character map. This object can map from character codes to CID's which can
38: * be used to index in a font object.
39: *
40: * <p>
41: */
42: abstract public class CMap extends COSBasedObject {
43: /**
44: * The meta class implementation
45: */
46: public static class MetaClass extends COSBasedObject.MetaClass {
47: protected MetaClass(Class instanceClass) {
48: super (instanceClass);
49: }
50:
51: protected COSBasedObject doCreateCOSBasedObject(COSObject object) {
52: if (object instanceof COSName) {
53: return NamedCMap.getSingleton((COSName) object);
54: } else {
55: return new StreamBasedCMap(object);
56: }
57: }
58: }
59:
60: /** The meta class instance */
61: public static final MetaClass META = new MetaClass(MetaClass.class
62: .getDeclaringClass());
63:
64: protected CMap(COSObject object) {
65: super (object);
66: }
67:
68: public static int toInt(byte[] bytes) {
69: int result = 0;
70: for (int i = 0; i < bytes.length; i++) {
71: result = result << 8;
72: result = result + (bytes[i] & 0xFF);
73: }
74: return result;
75: }
76:
77: public static int toInt(byte[] bytes, int offset, int length) {
78: int result = 0;
79: int end = offset + length;
80: for (int i = offset; i < end; i++) {
81: result = result << 8;
82: result = result + (bytes[i] & 0xFF);
83: }
84: return result;
85: }
86:
87: abstract public CID lookup(byte[] value);
88:
89: abstract public CID getNextCID(byte[] bytes, int offset);
90: }
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