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1
52
53 package com.go.trove.io;
54
55 import java.io.*;
56
57
64 public class LinePositionReader extends PositionReader {
65 private int mLineNumber = 1;
66 private int mPushback = -1;
67
68 public LinePositionReader(Reader reader) {
69 super(reader);
70 }
71
72 public int read() throws IOException {
73 int c;
74
75 if (mPushback >= 0) {
76 c = mPushback;
77 mPushback = -1;
78 }
79 else {
80 c = super.read();
81 }
82
83 if (c == '\n') {
84 mLineNumber++;
85 }
86 else if (c == '\r') {
87 int peek = super.read();
88 if (peek != '\n') {
89 mLineNumber++;
90 }
91 mPushback = peek;
92 }
93
94 return c;
95 }
96
97
101 public String  readLine() throws IOException {
102 StringBuffer buf = new StringBuffer (80);
103 int line = mLineNumber;
104 int c;
105 while (line == mLineNumber && (c = read()) >= 0) {
106 buf.append((char)c);
107 }
108 return buf.toString();
109 }
110
111
118 public int skipForwardToLine(int line) throws IOException {
119 while (mLineNumber < line && read() >= 0) {}
120 return mLineNumber;
121 }
122
123
127 public int getLineNumber() {
128 return mLineNumber;
129 }
130
131
135 public static String cleanWhitespace(String str) {
136 int length = str.length();
137
138 StringBuffer buf = new StringBuffer (length);
139 for (int i=0; i<length; i++) {
140 char c = str.charAt(i);
141 if (Character.isWhitespace(c)) {
142 buf.append(' ');
143 }
144 else {
145 buf.append(c);
146 }
147 }
148
149 return buf.toString();
150 }
151
152
156 public static String createSequence(char c, int length) {
157 if (length < 0) length = 1;
158
159 StringBuffer buf = new StringBuffer (length);
160 for (; length > 0; length--) {
161 buf.append(c);
162 }
163 return buf.toString();
164 }
165 }
166 |
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