Source Code Cross Referenced for cStringIO.java in  » Testing » Marathon » org » python » modules » Java Source Code / Java DocumentationJava Source Code and Java Documentation

Java Source Code / Java Documentation
1. 6.0 JDK Core
2. 6.0 JDK Modules
3. 6.0 JDK Modules com.sun
4. 6.0 JDK Modules com.sun.java
5. 6.0 JDK Modules sun
6. 6.0 JDK Platform
7. Ajax
8. Apache Harmony Java SE
9. Aspect oriented
10. Authentication Authorization
11. Blogger System
12. Build
13. Byte Code
14. Cache
15. Chart
16. Chat
17. Code Analyzer
18. Collaboration
19. Content Management System
20. Database Client
21. Database DBMS
22. Database JDBC Connection Pool
23. Database ORM
24. Development
25. EJB Server geronimo
26. EJB Server GlassFish
27. EJB Server JBoss 4.2.1
28. EJB Server resin 3.1.5
29. ERP CRM Financial
30. ESB
31. Forum
32. GIS
33. Graphic Library
34. Groupware
35. HTML Parser
36. IDE
37. IDE Eclipse
38. IDE Netbeans
39. Installer
40. Internationalization Localization
41. Inversion of Control
42. Issue Tracking
43. J2EE
44. JBoss
45. JMS
46. JMX
47. Library
48. Mail Clients
49. Net
50. Parser
51. PDF
52. Portal
53. Profiler
54. Project Management
55. Report
56. RSS RDF
57. Rule Engine
58. Science
59. Scripting
60. Search Engine
61. Security
62. Sevlet Container
63. Source Control
64. Swing Library
65. Template Engine
66. Test Coverage
67. Testing
68. UML
69. Web Crawler
70. Web Framework
71. Web Mail
72. Web Server
73. Web Services
74. Web Services apache cxf 2.0.1
75. Web Services AXIS2
76. Wiki Engine
77. Workflow Engines
78. XML
79. XML UI
Java
Java Tutorial
Java Open Source
Jar File Download
Java Articles
Java Products
Java by API
Photoshop Tutorials
Maya Tutorials
Flash Tutorials
3ds-Max Tutorials
Illustrator Tutorials
GIMP Tutorials
C# / C Sharp
C# / CSharp Tutorial
C# / CSharp Open Source
ASP.Net
ASP.NET Tutorial
JavaScript DHTML
JavaScript Tutorial
JavaScript Reference
HTML / CSS
HTML CSS Reference
C / ANSI-C
C Tutorial
C++
C++ Tutorial
Ruby
PHP
Python
Python Tutorial
Python Open Source
SQL Server / T-SQL
SQL Server / T-SQL Tutorial
Oracle PL / SQL
Oracle PL/SQL Tutorial
PostgreSQL
SQL / MySQL
MySQL Tutorial
VB.Net
VB.Net Tutorial
Flash / Flex / ActionScript
VBA / Excel / Access / Word
XML
XML Tutorial
Microsoft Office PowerPoint 2007 Tutorial
Microsoft Office Excel 2007 Tutorial
Microsoft Office Word 2007 Tutorial
Java Source Code / Java Documentation » Testing » Marathon » org.python.modules 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright 1998 Finn Bock.
003:         *
004:         * This program contains material copyrighted by:
005:         * Copyright (c) 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
006:         * The Netherlands.
007:         */
008:
009:        package org.python.modules;
010:
011:        import org.python.core.Py;
012:        import org.python.core.PyCallIter;
013:        import org.python.core.PyList;
014:        import org.python.core.PyObject;
015:        import org.python.core.PyString;
016:
017:        /**
018:         * This module implements a file-like class, StringIO, that reads and
019:         * writes a string buffer (also known as memory files).
020:         * See the description on file objects for operations.
021:         * @author Finn Bock, bckfnn@pipmail.dknet.dk
022:         * @version cStringIO.java,v 1.10 1999/05/20 18:03:20 fb Exp
023:         */
024:        public class cStringIO {
025:            /**
026:             * Create an empty StringIO object
027:             * @return          a new StringIO object.
028:             */
029:            public static StringIO StringIO() {
030:                return new StringIO();
031:            }
032:
033:            /**
034:             * Create a StringIO object, initialized by the value.
035:             * @param buf       The initial value.
036:             * @return          a new StringIO object.
037:             */
038:            public static StringIO StringIO(String buf) {
039:                return new StringIO(buf);
040:            }
041:
042:            /**
043:             * The StringIO object
044:             * @see cStringIO#StringIO()
045:             * @see cStringIO#StringIO(String)
046:             */
047:            public static class StringIO extends PyObject {
048:                transient public boolean softspace = false;
049:                //transient public String name = "<cStringIO>";
050:                //transient public String mode = "w";
051:                transient public boolean closed = false;
052:
053:                transient private char[] buf;
054:                transient private int count;
055:                transient private int pos;
056:
057:                StringIO() {
058:                    this .buf = new char[16];
059:                }
060:
061:                StringIO(String buf) {
062:                    this .buf = new char[buf.length() + 16];
063:                    write(buf);
064:                    seek(0);
065:                }
066:
067:                public void __setattr__(String name, PyObject value) {
068:                    if (name == "softspace") {
069:                        softspace = value.__nonzero__();
070:                        return;
071:                    }
072:                    super .__setattr__(name, value);
073:                }
074:
075:                public PyObject __iter__() {
076:                    return new PyCallIter(__getattr__("readline"), Py
077:                            .newString(""));
078:                }
079:
080:                /**
081:                 * Free the memory buffer.
082:                 */
083:                public void close() {
084:                    buf = null;
085:                    closed = true;
086:                }
087:
088:                /**
089:                 * Return false.
090:                 * @return      false.
091:                 */
092:                public boolean isatty() {
093:                    return false;
094:                }
095:
096:                /**
097:                 * Position the file pointer to the absolute position.
098:                 * @param       pos the position in the file.
099:                 */
100:                public void seek(long pos) {
101:                    seek(pos, 0);
102:                }
103:
104:                /**
105:                 * Position the file pointer to the position in the .
106:                 * @param       pos the position in the file.
107:                 * @param       mode; 0=from the start, 1=relative, 2=from the end.
108:                 */
109:                public void seek(long pos, int mode) {
110:                    if (mode == 1)
111:                        this .pos = (int) pos + this .pos;
112:                    else if (mode == 2)
113:                        this .pos = (int) pos + count;
114:                    else
115:                        this .pos = Math.max(0, (int) pos);
116:                }
117:
118:                /**
119:                 * Reset the file position to the beginning of the file.
120:                 */
121:                public void reset() {
122:                    pos = 0;
123:                }
124:
125:                /**
126:                 * Return the file position.
127:                 * @returns     the position in the file.
128:                 */
129:                public long tell() {
130:                    return pos;
131:                }
132:
133:                /**
134:                 * Read all data until EOF is reached.
135:                 * An empty string is returned when EOF is encountered immediately.
136:                 * @returns     A string containing the data.
137:                 */
138:                public String read() {
139:                    return read(-1);
140:                }
141:
142:                /**
143:                 * Read at most size bytes from the file (less if the read hits EOF).
144:                 * If the size argument is negative, read all data until EOF is
145:                 * reached. An empty string is returned when EOF is encountered
146:                 * immediately.
147:                 * @param size  the number of characters to read.
148:                 * @returns     A string containing the data read.
149:                 */
150:                public String read(int size) {
151:                    opencheck();
152:                    int newpos = (size < 0) ? count : Math.min(pos + size,
153:                            count);
154:                    String r = null;
155:                    if (size == 1 && newpos > pos) {
156:                        r = cStringIO.getString(buf[pos]);
157:                    } else {
158:                        r = new String(buf, pos, newpos - pos);
159:                    }
160:                    pos = newpos;
161:                    return r;
162:                }
163:
164:                private int indexOf(char ch, int pos) {
165:                    for (int i = pos; i < count; i++) {
166:                        if (buf[i] == ch)
167:                            return i;
168:                    }
169:                    return -1;
170:                }
171:
172:                /**
173:                 * Read one entire line from the file. A trailing newline character
174:                 * is kept in the string (but may be absent when a file ends with
175:                 * an incomplete line).
176:                 * An empty string is returned when EOF is hit immediately.
177:                 * @returns data from the file up to and including the newline.
178:                 */
179:                public String readline() {
180:                    return readline(-1);
181:                }
182:
183:                /**
184:                 * Read one entire line from the file. A trailing newline character
185:                 * is kept in the string (but may be absent when a file ends with an
186:                 * incomplete line).
187:                 * If the size argument is non-negative, it is a maximum byte count
188:                 * (including the trailing newline) and an incomplete line may be
189:                 * returned.
190:                 * @returns data from the file up to and including the newline.
191:                 */
192:                public String readline(int length) {
193:                    opencheck();
194:                    int i = indexOf('\n', pos);
195:                    int newpos = (i < 0) ? count : i + 1;
196:                    if (length != -1 && pos + length < newpos)
197:                        newpos = pos + length;
198:                    String r = new String(buf, pos, newpos - pos);
199:                    pos = newpos;
200:                    return r;
201:                }
202:
203:                /**
204:                 * Read and return a line without the trailing newling.
205:                 * Usind by cPickle as an optimization.
206:                 */
207:                public String readlineNoNl() {
208:                    int i = indexOf('\n', pos);
209:                    int newpos = (i < 0) ? count : i;
210:                    String r = new String(buf, pos, newpos - pos);
211:                    pos = newpos;
212:                    if (pos < count) // Skip the newline
213:                        pos++;
214:                    return r;
215:                }
216:
217:                /**
218:                 * Read until EOF using readline() and return a list containing
219:                 * the lines thus read.
220:                 * @return      a list of the lines.
221:                 */
222:                public PyObject readlines() {
223:                    return readlines(0);
224:                }
225:
226:                /**
227:                 * Read until EOF using readline() and return a list containing
228:                 * the lines thus read.
229:                 * @return      a list of the lines.
230:                 */
231:                public PyObject readlines(int sizehint) {
232:                    opencheck();
233:                    int total = 0;
234:                    PyList lines = new PyList();
235:                    String line = readline();
236:                    while (line.length() > 0) {
237:                        lines.append(new PyString(line));
238:                        total += line.length();
239:                        if (0 < sizehint && sizehint <= total)
240:                            break;
241:                        line = readline();
242:                    }
243:                    return lines;
244:                }
245:
246:                /**
247:                 * truncate the file at the current position.
248:                 */
249:                public void truncate() {
250:                    truncate(-1);
251:                }
252:
253:                /**
254:                 * truncate the file at the position pos.
255:                 */
256:                public void truncate(int pos) {
257:                    opencheck();
258:                    if (pos < 0)
259:                        pos = this .pos;
260:                    if (count > pos)
261:                        count = pos;
262:                }
263:
264:                private void expandCapacity(int newLength) {
265:                    int newCapacity = (buf.length + 1) * 2;
266:                    if (newLength > newCapacity) {
267:                        newCapacity = newLength;
268:                    }
269:
270:                    char newBuf[] = new char[newCapacity];
271:                    System.arraycopy(buf, 0, newBuf, 0, count);
272:                    buf = newBuf;
273:                    //System.out.println("newleng:" + newCapacity);
274:                }
275:
276:                /**
277:                 * Write a string to the file.
278:                 * @param s     The data to write.
279:                 */
280:                public void write(String s) {
281:                    opencheck();
282:                    int newpos = pos + s.length();
283:
284:                    if (newpos >= buf.length)
285:                        expandCapacity(newpos);
286:                    if (newpos > count)
287:                        count = newpos;
288:
289:                    s.getChars(0, s.length(), buf, pos);
290:                    pos = newpos;
291:                }
292:
293:                /**
294:                 * Write a char to the file. Used by cPickle as an optimization.
295:                 * @param ch    The data to write.
296:                 */
297:                public void writeChar(char ch) {
298:                    if (pos + 1 >= buf.length)
299:                        expandCapacity(pos + 1);
300:                    buf[pos++] = ch;
301:                    if (pos > count)
302:                        count = pos;
303:                }
304:
305:                /**
306:                 * Write a list of strings to the file.
307:                 */
308:                public void writelines(String[] lines) {
309:                    for (int i = 0; i < lines.length; i++) {
310:                        write(lines[i]);
311:                    }
312:                }
313:
314:                /**
315:                 * Flush the internal buffer. Does nothing.
316:                 */
317:                public void flush() {
318:                    opencheck();
319:                }
320:
321:                /**
322:                 * Retrieve the entire contents of the ``file'' at any time
323:                 * before the StringIO object's close() method is called.
324:                 * @return      the contents of the StringIO.
325:                 */
326:                public String getvalue() {
327:                    opencheck();
328:                    return new String(buf, 0, count);
329:                }
330:
331:                private final void opencheck() {
332:                    if (buf == null)
333:                        throw Py.ValueError("I/O operation on closed file");
334:                }
335:            }
336:
337:            private static String[] strings = new String[256];
338:
339:            static String getString(char ch) {
340:                if ((int) ch > 255) {
341:                    return new String(new char[] { ch });
342:                }
343:
344:                String s = strings[(int) ch];
345:
346:                if (s == null) {
347:                    s = new String(new char[] { ch });
348:                    strings[(int) ch] = s;
349:                }
350:                return s;
351:            }
352:        }
www.java2java.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.