Source Code Cross Referenced for Printf.java in  » EJB-Server-resin-3.1.5 » ecmascript » com » caucho » es » 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 » EJB Server resin 3.1.5 » ecmascript » com.caucho.es 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:         * Copyright (c) 1998-2006 Caucho Technology -- all rights reserved
003:         *
004:         * This file is part of Resin(R) Open Source
005:         *
006:         * Each copy or derived work must preserve the copyright notice and this
007:         * notice unmodified.
008:         *
009:         * Resin Open Source is free software; you can redistribute it and/or modify
010:         * it under the terms of the GNU General Public License as published by
011:         * the Free Software Foundation; either version 2 of the License, or
012:         * (at your option) any later version.
013:         *
014:         * Resin Open Source is distributed in the hope that it will be useful,
015:         * but WITHOUT ANY WARRANTY; without even the implied warranty of
016:         * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, or any warranty
017:         * of NON-INFRINGEMENT.  See the GNU General Public License for more
018:         * details.
019:         *
020:         * You should have received a copy of the GNU General Public License
021:         * along with Resin Open Source; if not, write to the
022:         *   Free SoftwareFoundation, Inc.
023:         *   59 Temple Place, Suite 330
024:         *   Boston, MA 02111-1307  USA
025:         *
026:         * @author Scott Ferguson
027:         */
028:
029:        package com.caucho.es;
030:
031:        import com.caucho.util.CharBuffer;
032:
033:        class Printf {
034:            private final static int ALT = 0x01;
035:            private final static int ZERO_FILL = 0x02;
036:            private final static int POS_PLUS = 0x04;
037:            private final static int POS_SPACE = 0x08;
038:            private final static int LALIGN = 0x10;
039:            private final static int BIG = 0x20;
040:            private final static int NO_TRAIL_ZERO = 0x40;
041:
042:            private static char[] digits = { '0', '1', '2', '3', '4', '5', '6',
043:                    '7', '8', '9', 'a', 'b', 'c', 'd', 'e', 'f' };
044:            private static char[] bigDigits = { '0', '1', '2', '3', '4', '5',
045:                    '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
046:
047:            private Printf() {
048:            }
049:
050:            public static String sprintf(Call eval, int length)
051:                    throws Throwable {
052:                if (length == 0)
053:                    return "";
054:
055:                CharBuffer buf = new CharBuffer();
056:
057:                printf(buf, eval.getArg(0).toStr(), eval, length);
058:
059:                return buf.toString();
060:            }
061:
062:            public static CharBuffer printf(CharBuffer result, ESString format,
063:                    Call eval, int length) throws Throwable {
064:                int arg = 1;
065:                int len = format.length();
066:
067:                for (int i = 0; i < len; i++) {
068:                    int ch;
069:                    int start = i;
070:
071:                    if ((ch = format.charAt(i)) != '%') {
072:                        result.append((char) ch);
073:                        continue;
074:                    }
075:
076:                    int flags = 0;
077:                    loop: while (++i < len) {
078:                        switch ((ch = format.charAt(i))) {
079:                        case '0':
080:                            flags |= ZERO_FILL;
081:                            break;
082:                        case '+':
083:                            flags |= POS_PLUS;
084:                            break;
085:                        case ' ':
086:                            flags |= POS_SPACE;
087:                            break;
088:                        case '#':
089:                            flags |= ALT;
090:                            break;
091:                        case '-':
092:                            flags |= LALIGN;
093:                            break;
094:
095:                        default:
096:                            break loop;
097:                        }
098:                    }
099:
100:                    int width = 0;
101:                    for (; i < len && (ch = format.charAt(i)) >= '0'
102:                            && ch <= '9'; i++) {
103:                        width = 10 * width + ch - '0';
104:                    }
105:
106:                    if (i >= len) {
107:                        fixBits(result, format, start, i);
108:                        break;
109:                    }
110:
111:                    int prec = 0;
112:                    if (ch == '.') {
113:                        while (++i < len && (ch = format.charAt(i)) >= '0'
114:                                && ch <= '9') {
115:                            prec = 10 * prec + ch - '0';
116:                        }
117:                    } else
118:                        prec = -1;
119:
120:                    if (i >= len) {
121:                        fixBits(result, format, start, i);
122:                        break;
123:                    }
124:
125:                    switch (ch) {
126:                    case '%':
127:                        result.append((char) '%');
128:                        break;
129:
130:                    case 'd':
131:                        if (arg >= length)
132:                            throw new ESException("missing printf argument");
133:                        formatInteger(result, eval.getArg(arg++).toNum(),
134:                                width, prec, flags, 10);
135:                        break;
136:
137:                    case 'o':
138:                        if (arg >= length)
139:                            throw new ESException("missing printf argument");
140:                        formatInteger(result, eval.getArg(arg++).toNum(),
141:                                width, prec, flags, 8);
142:                        break;
143:
144:                    case 'X':
145:                        flags |= BIG;
146:                    case 'x':
147:                        if (arg >= length)
148:                            throw new ESException("missing printf argument");
149:                        formatInteger(result, eval.getArg(arg++).toNum(),
150:                                width, prec, flags, 16);
151:                        break;
152:
153:                    case 'E':
154:                    case 'G':
155:                        flags |= BIG;
156:                    case 'f':
157:                    case 'e':
158:                    case 'g':
159:                        if (arg >= length)
160:                            throw new ESException("missing printf argument");
161:                        formatDouble(result, eval.getArg(arg++).toNum(), width,
162:                                prec, flags, ch);
163:                        break;
164:
165:                    case 'c':
166:                        if (arg >= length)
167:                            throw new ESException("missing printf argument");
168:                        formatChar(result, (int) eval.getArg(arg++).toNum(),
169:                                width, flags);
170:                        break;
171:
172:                    case 's':
173:                        if (arg >= length)
174:                            throw new ESException("missing printf argument");
175:                        formatString(result, eval.getArg(arg++).toStr(), prec,
176:                                width, flags);
177:                        break;
178:
179:                    default:
180:                        fixBits(result, format, start, i + 1);
181:                        break;
182:                    }
183:                }
184:
185:                return result;
186:            }
187:
188:            private static void formatDouble(CharBuffer cb, double value,
189:                    int prec, int flags, int type) {
190:                String raw = Double.toString(value);
191:                int expt = 0;
192:                int i = 0;
193:                CharBuffer digits = new CharBuffer();
194:                int ch = raw.charAt(i);
195:                boolean seenDigit = false;
196:
197:                // XXX: locale screws us?
198:                for (; i < raw.length(); i++) {
199:                    if ((ch = raw.charAt(i)) == '.' || ch == 'e' || ch == 'E')
200:                        break;
201:                    else if (!seenDigit && ch == '0') {
202:                    } else {
203:                        seenDigit = true;
204:                        digits.append((char) ch);
205:                        expt++;
206:                    }
207:                }
208:
209:                if (ch == '.')
210:                    i++;
211:
212:                for (; i < raw.length(); i++) {
213:                    ch = raw.charAt(i);
214:
215:                    if (!seenDigit && ch == '0') {
216:                        expt--;
217:                    } else if (ch >= '0' && ch <= '9') {
218:                        digits.append((char) ch);
219:                        seenDigit = true;
220:                    } else {
221:                        int sign = 1;
222:                        i++;
223:                        if ((ch = raw.charAt(i)) == '+') {
224:                            i++;
225:                        } else if (ch == '-') {
226:                            i++;
227:                            sign = -1;
228:                        }
229:
230:                        int e = 0;
231:                        for (; i < raw.length() && (ch = raw.charAt(i)) >= '0'
232:                                && ch <= '9'; i++) {
233:                            e = 10 * e + ch - '0';
234:                        }
235:
236:                        expt += sign * e;
237:                        break;
238:                    }
239:                }
240:
241:                if (!seenDigit)
242:                    expt = 1;
243:
244:                while (digits.length() > 0
245:                        && digits.charAt(digits.length() - 1) == '0')
246:                    digits.setLength(digits.length() - 1);
247:
248:                if (type == 'f') {
249:                    if (roundDigits(digits, expt + prec)) {
250:                        expt++;
251:                    }
252:
253:                    formatFixed(cb, digits, expt, prec, flags);
254:                } else if (type == 'e' || type == 'E') {
255:                    if (roundDigits(digits, prec + 1))
256:                        expt++;
257:
258:                    formatExpt(cb, digits, expt, prec, flags);
259:                } else {
260:                    if (roundDigits(digits, prec))
261:                        expt++;
262:
263:                    if (expt < -3 || expt > prec)
264:                        formatExpt(cb, digits, expt, prec - 1, flags
265:                                | NO_TRAIL_ZERO);
266:                    else
267:                        formatFixed(cb, digits, expt, prec - expt, flags
268:                                | NO_TRAIL_ZERO);
269:                }
270:            }
271:
272:            private static void formatDouble(CharBuffer cb, double value,
273:                    int width, int prec, int flags, int type) {
274:                if (prec < 0)
275:                    prec = 6;
276:
277:                int offset = cb.length();
278:
279:                if ((flags & ZERO_FILL) != 0
280:                        && (value < 0 || (flags & (POS_PLUS | POS_SPACE)) != 0)) {
281:                    offset++;
282:                    width--;
283:                }
284:
285:                if (value < 0) {
286:                    cb.append((char) '-');
287:                    value = -value;
288:                } else if ((flags & POS_PLUS) != 0) {
289:                    cb.append((char) '+');
290:                } else if ((flags & POS_SPACE) != 0) {
291:                    cb.append((char) ' ');
292:                }
293:
294:                formatDouble(cb, value, prec, flags, type);
295:
296:                width -= cb.length() - offset;
297:
298:                for (int i = 0; i < width; i++) {
299:                    if ((flags & LALIGN) != 0)
300:                        cb.append(' ');
301:                    else
302:                        cb.insert(offset, (flags & ZERO_FILL) == 0 ? ' ' : '0');
303:                }
304:            }
305:
306:            private static boolean roundDigits(CharBuffer digits, int len) {
307:                if (len < 0 || digits.length() <= len)
308:                    return false;
309:
310:                int value = digits.charAt(len);
311:                if (value < '5')
312:                    return false;
313:
314:                for (int i = len - 1; i >= 0; i--) {
315:                    int ch = digits.charAt(i);
316:
317:                    if (ch != '9') {
318:                        digits.setCharAt(i, (char) (ch + 1));
319:                        return false;
320:                    }
321:                    digits.setCharAt(i, '0');
322:                }
323:
324:                digits.insert(0, '1');
325:
326:                return true;
327:            }
328:
329:            private static void formatFixed(CharBuffer cb, CharBuffer digits,
330:                    int expt, int prec, int flags) {
331:                int i = 0;
332:                int origExpt = expt;
333:
334:                for (; expt > 0; expt--) {
335:                    if (i < digits.length())
336:                        cb.append((char) digits.charAt(i++));
337:                    else
338:                        cb.append('0');
339:                }
340:
341:                if (origExpt <= 0) // || digits.length() == 0)
342:                    cb.append('0');
343:
344:                if (prec > 0 || (flags & ALT) != 0)
345:                    cb.append('.');
346:
347:                for (; expt < 0 && prec > 0; expt++) {
348:                    cb.append('0');
349:                    prec--;
350:                }
351:
352:                for (; prec > 0 && i < digits.length(); i++) {
353:                    cb.append(digits.charAt(i));
354:                    prec--;
355:                }
356:
357:                for (; prec > 0
358:                        && (flags & (NO_TRAIL_ZERO | ALT)) != NO_TRAIL_ZERO; prec--)
359:                    cb.append('0');
360:            }
361:
362:            private static void formatExpt(CharBuffer cb, CharBuffer digits,
363:                    int expt, int prec, int flags) {
364:                if (digits.length() == 0)
365:                    cb.append('0');
366:                else
367:                    cb.append((char) digits.charAt(0));
368:
369:                if (prec > 0 || (flags & ALT) != 0)
370:                    cb.append('.');
371:
372:                for (int i = 1; i < digits.length(); i++) {
373:                    if (prec > 0)
374:                        cb.append((char) digits.charAt(i));
375:                    prec--;
376:                }
377:
378:                for (; prec > 0
379:                        && (flags & (NO_TRAIL_ZERO | ALT)) != NO_TRAIL_ZERO; prec--)
380:                    cb.append('0');
381:
382:                if ((flags & BIG) != 0)
383:                    cb.append('E');
384:                else
385:                    cb.append('e');
386:
387:                formatInteger(cb, expt - 1, 0, 2, POS_PLUS, 10);
388:            }
389:
390:            private static void formatInteger(CharBuffer cb, double dvalue,
391:                    int width, int prec, int flags, int radix) {
392:                boolean isBig = (flags & BIG) != 0;
393:                int begin = cb.length();
394:
395:                long value;
396:                if (dvalue > 0)
397:                    value = (long) (dvalue + 0.5);
398:                else
399:                    value = (long) (dvalue - 0.5);
400:
401:                if (value < 0 && radix == 10) {
402:                    cb.append((char) '-');
403:                    value = -value;
404:                } else if (value >= 0 && radix == 10 && (flags & POS_PLUS) != 0)
405:                    cb.append((char) '+');
406:                else if (value >= 0 && radix == 10 && (flags & POS_SPACE) != 0)
407:                    cb.append((char) ' ');
408:                else if (value < 0)
409:                    value &= 0xffffffffL;
410:                else if (radix == 8 && (flags & ALT) != 0 && value != 0)
411:                    cb.append('0');
412:                else if (radix == 16 && (flags & ALT) != 0)
413:                    cb.append((flags & BIG) == 0 ? "0x" : "0X");
414:
415:                if ((flags & ZERO_FILL) != 0) {
416:                    width -= cb.length() - begin;
417:                    begin = cb.length();
418:                }
419:
420:                int offset = cb.length();
421:                int len = 0;
422:                while (value != 0) {
423:                    len++;
424:                    cb
425:                            .insert(
426:                                    offset,
427:                                    (isBig ? bigDigits : digits)[(int) (value % radix)]);
428:                    value /= radix;
429:                }
430:
431:                for (int i = 0; i < prec - len; i++)
432:                    cb.insert(offset, '0');
433:                if (len == 0 && prec == 0)
434:                    cb.insert(offset, '0');
435:
436:                width -= cb.length() - begin;
437:                for (; width > 0; width--) {
438:                    if ((flags & LALIGN) != 0)
439:                        cb.append(' ');
440:                    else if ((flags & ZERO_FILL) != 0 && prec < 0)
441:                        cb.insert(begin, '0');
442:                    else
443:                        cb.insert(begin, ' ');
444:                }
445:
446:                if (cb.length() == begin)
447:                    cb.append('0');
448:            }
449:
450:            private static void formatChar(CharBuffer cb, int ch, int width,
451:                    int flags) {
452:                int offset = cb.length();
453:
454:                cb.append((char) ch);
455:
456:                if ((flags & LALIGN) == 0) {
457:                    for (int i = 0; i < width - 1; i++)
458:                        cb.insert(offset, (char) ' ');
459:                } else {
460:                    for (int i = 0; i < width - 1; i++)
461:                        cb.append((char) ' ');
462:                }
463:            }
464:
465:            private static void formatString(CharBuffer cb, ESString string,
466:                    int prec, int width, int flags) {
467:                int offset = cb.length();
468:
469:                if (prec < 0)
470:                    prec = Integer.MAX_VALUE;
471:
472:                for (int i = 0; i < string.length() && i < prec; i++) {
473:                    width--;
474:                    cb.append(string.charAt(i));
475:                }
476:
477:                if ((flags & LALIGN) == 0) {
478:                    for (int i = 0; i < width; i++)
479:                        cb.insert(offset, (char) ' ');
480:                } else {
481:                    for (int i = 0; i < width; i++)
482:                        cb.append((char) ' ');
483:                }
484:            }
485:
486:            private static void fixBits(CharBuffer cb, ESString format, int s,
487:                    int i) {
488:                for (; s < i; s++)
489:                    cb.append((char) format.charAt(s));
490:            }
491:        }
www.java2java.com | Contact Us
Copyright 2009 - 12 Demo Source and Support. All rights reserved.
All other trademarks are property of their respective owners.