1 // © 2016 and later: Unicode, Inc. and others. 2 // License & terms of use: http://www.unicode.org/copyright.html#License 3 /* 4 ******************************************************************************* 5 * Copyright (C) 1998-2004, International Business Machines Corporation and * 6 * others. All Rights Reserved. * 7 ******************************************************************************* 8 * 9 * Created on Dec 3, 2003 10 * 11 ******************************************************************************* 12 */ 13 package com.ibm.icu.dev.tool.layout; 14 15 16 import java.io.PrintStream; 17 18 import com.ibm.icu.impl.Utility; 19 20 abstract class OpenTypeTableWriter 21 { 22 static class OpenTypeTableDumper 23 { 24 private short[] table; 25 private int tableLength; 26 OpenTypeTableDumper(short[] data, int outputIndex)27 OpenTypeTableDumper(short[] data, int outputIndex) 28 { 29 table = data; 30 tableLength = outputIndex; 31 } 32 length()33 int length() 34 { 35 return tableLength; 36 } 37 appendValue(StringBuffer line, int index)38 void appendValue(StringBuffer line, int index) 39 { 40 short value = table[index]; 41 42 line.append("0x"); 43 line.append(Utility.hex((value >> 8) & 0xFF, 2)); 44 line.append(", "); 45 46 line.append("0x"); 47 line.append(Utility.hex(value & 0xFF, 2)); 48 } 49 dumpTable(PrintStream output, int valuesPerLine)50 void dumpTable(PrintStream output, int valuesPerLine) { 51 StringBuffer line = new StringBuffer(" "); // four spaces 52 int maxIndex = length(); 53 54 for (int i = 0; i < maxIndex; i += 1) { 55 56 if (i > 0 && i % valuesPerLine == 0) { 57 output.println(line.toString()); 58 line.setLength(4); 59 } 60 61 appendValue(line, i); 62 line.append(", "); 63 } 64 65 line.setLength(line.length() - 2); 66 67 output.println(line.toString()); 68 } 69 } 70 71 protected short[] data; 72 protected int outputIndex; 73 OpenTypeTableWriter(int initialBufferSize)74 public OpenTypeTableWriter(int initialBufferSize) 75 { 76 data = new short[initialBufferSize]; 77 outputIndex = 0; 78 } 79 OpenTypeTableWriter()80 public OpenTypeTableWriter() 81 { 82 this(1024); 83 } 84 getOutputIndex()85 public int getOutputIndex() 86 { 87 return outputIndex; 88 } 89 writeData(int value)90 public void writeData(int value) 91 { 92 if (outputIndex >= data.length) 93 { 94 short[] newData = new short[data.length + 512]; 95 96 System.arraycopy(data, 0, newData, 0, data.length); 97 98 data = newData; 99 } 100 101 data[outputIndex] = (short) value; 102 outputIndex += 1; 103 } 104 writeTag(String tag)105 public void writeTag(String tag) 106 { 107 char[] charArray = {'\0', '\0', '\0', '\0'}; 108 int max = Math.min(tag.length(), 4); 109 110 tag.getChars(0, max, charArray, 0); 111 112 writeData(((charArray[0] & 0xFF) << 8) + (charArray[1] & 0xFF)); 113 writeData(((charArray[2] & 0xFF) << 8) + (charArray[3] & 0xFF)); 114 } 115 fixOffset(int offset, int base)116 public void fixOffset(int offset, int base) 117 { 118 // * 2 to convert from short to byte index 119 data[offset] = (short) ((outputIndex - base) * 2); 120 } 121 dumpTable(PrintStream output, int valuesPerLine)122 public void dumpTable(PrintStream output, int valuesPerLine) 123 { 124 OpenTypeTableDumper dumper = new OpenTypeTableDumper(data, outputIndex); 125 126 dumper.dumpTable(output, valuesPerLine); 127 } 128 writeTable(PrintStream output)129 abstract public void writeTable(PrintStream output); 130 } 131