01: /*
02: * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
03: *
04: * This file is part of Resin(R) Open Source
05: *
06: * Each copy or derived work must preserve the copyright notice and this
07: * notice unmodified.
08: *
09: * Resin Open Source is free software; you can redistribute it and/or modify
10: * it under the terms of the GNU General Public License as published by
11: * the Free Software Foundation; either version 2 of the License, or
12: * (at your option) any later version.
13: *
14: * Resin Open Source is distributed in the hope that it will be useful,
15: * but WITHOUT ANY WARRANTY; without even the implied warranty of
16: * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
17: * of NON-INFRINGEMENT. See the GNU General Public License for more
18: * details.
19: *
20: * You should have received a copy of the GNU General Public License
21: * along with Resin Open Source; if not, write to the
22: * Free SoftwareFoundation, Inc.
23: * 59 Temple Place, Suite 330
24: * Boston, MA 02111-1307 USA
25: *
26: * @author Scott Ferguson
27: */
28:
29: package com.caucho.eswrap.java.io;
30:
31: import com.caucho.util.CharBuffer;
32:
33: import java.io.IOException;
34: import java.io.Reader;
35:
36: public class ReaderEcmaWrap {
37: public static int readByte(Reader is) throws IOException {
38: return is.read();
39: }
40:
41: public static String read(Reader is) throws IOException {
42: int ch = is.read();
43:
44: if (ch == -1)
45: return null;
46:
47: return String.valueOf((char) ch);
48: }
49:
50: public static String read(Reader is, int length) throws IOException {
51: CharBuffer bb = new CharBuffer();
52:
53: for (; length > 0; length--) {
54: int ch = is.read();
55:
56: if (ch == -1)
57: break;
58:
59: bb.append((char) ch);
60: }
61:
62: if (bb.length() == 0)
63: return null;
64:
65: return bb.toString();
66: }
67:
68: public static String readln(Reader is) throws IOException {
69: CharBuffer bb = new CharBuffer();
70:
71: boolean hasCr = false;
72: boolean hasData = false;
73: while (true) {
74: int ch = is.read();
75:
76: if (ch == -1)
77: break;
78: else if (ch == '\n') {
79: hasData = true;
80: break;
81: } else if (hasCr) {
82: hasData = true;
83: break;
84: }
85:
86: if (ch == '\r')
87: hasCr = true;
88: else
89: bb.append((char) ch);
90: }
91:
92: if (bb.length() == 0 && !hasData)
93: return null;
94:
95: return bb.toString();
96: }
97: }
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