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1
50
51 package org.openlaszlo.iv.flash.parser;
52
53 import java.io.*;
54 import java.util.*;
55 import java.util.zip.*;
56
57 import org.openlaszlo.iv.flash.api.*;
58 import org.openlaszlo.iv.flash.util.*;
59
60
61 public final class Parser extends FlashBuffer {
62
63 private int tagStartPos;
64 private int tagDataPos;
65 private int tagLength;
66 private int tagEndPos;
67 private int tagCode;
68
69 private byte[] temp_bufb;
70 private char[] temp_bufc;
71
72 private FlashFile file;
74
75 public Parser() {
76 }
77
78 public int getTag() {
79 tagStartPos = getPos();
80 int code = getUWord();
81 int length = code & 0x3f;
82 code = code >> 6;
83
84 if( length == 0x3f ) {
85 length = getUDWord();
86 }
87
88 tagDataPos = getPos();
89 tagLength = length;
90 tagCode = code;
91 tagEndPos = tagDataPos+length;
92 return code;
93 }
94
95 public void addDef( FlashDef def ) {
96 file.addDef(def);
97 }
98
99 public FlashDef getDef( int id ) {
100 return file.getDef(id);
101 }
102
103 public void addDefToLibrary( String  name, FlashDef def ) {
104 file.addDefToLibrary( name, def );
105 }
106
107 public FlashDef getDefFromLibrary( String name ) {
108 return file.getDefFromLibrary( name );
109 }
110
111 public int getTagStartPos() {
112 return tagStartPos;
113 }
114 public int getTagDataPos() {
115 return tagDataPos;
116 }
117 public int getTagLength() {
118 return tagLength;
119 }
120 public int getTagEndPos() {
121 return tagEndPos;
122 }
123 public int getTagCode() {
124 return tagCode;
125 }
126
127 public byte[] getTempByteBuf( int size ) {
128 if( temp_bufb == null || temp_bufb.length < size ) {
129 temp_bufb = new byte[size];
130 }
131 return temp_bufb;
132 }
133
134 public char[] getTempCharBuf( int size ) {
135 if( temp_bufc == null || temp_bufc.length < size ) {
136 temp_bufc = new char[size];
137 }
138 return temp_bufc;
139 }
140
141 public FlashObject newUnknownTag() {
142 return new UnparsedTag( tagCode, getBuf(), tagStartPos, tagEndPos );
143 }
144
145 public void skipLastTag() {
146 setPos( tagEndPos );
147 }
148
149 public FlashFile getFile() {
150 return file;
151 }
152
153
156 public void parseStream( InputStream is, FlashFile file ) throws IVException, IOException {
157
158 byte[] fileHdr = new byte[8];
159
160 if( is.read(fileHdr, 0, 8) != 8 ) {
161 throw new IVException( Resource.CANTREADHEADER, new Object [] {file.getFullName()} );
162 }
163
164 if( fileHdr[1] != 'W' || fileHdr[2] != 'S' ) {
165 throw new IVException( Resource.ILLEGALHEADER, new Object [] {file.getFullName()} );
166 }
167
168 boolean isCompressed = false;
169 if( fileHdr[0] == 'C' ) {
170 isCompressed = true;
171 } else if( fileHdr[0] != 'F' ) {
172 throw new IVException( Resource.ILLEGALHEADER, new Object [] {file.getFullName()} );
173 }
174
175 int fileSize = Util.getUDWord(fileHdr[4], fileHdr[5], fileHdr[6], fileHdr[7]);
177
178 if( fileSize < 21 ) {
179 throw new IVException( Resource.FILETOOSHORT, new Object [] {file.getFullName()} );
180 }
181
182 FlashBuffer fb;
183 try {
184 fb = new FlashBuffer(fileSize+8);
185 } catch( OutOfMemoryError e ) {
186 throw new IVException( Resource.FILETOOBIG, new Object [] {file.getFullName()} );
187 }
188
189 fb.writeArray(fileHdr, 0, 8);
190
191 if( isCompressed ) {
192 is = new InflaterInputStream(is);
193 }
194
195 fb.write(is);
196
197 file.setCompressed(isCompressed);
198 _parseBuffer(fb, file);
199 }
200
201
204 public void parseBuffer( FlashBuffer fob, FlashFile file ) throws IVException {
205 boolean isCompressed = false;
206
207 if( fob.getBuf()[0] == 'C' ) {
208 isCompressed = true;
209 } else if( fob.getBuf()[0] != 'F' ) {
210 throw new IVException( Resource.ILLEGALHEADER, new Object [] {file.getFullName()} );
211 }
212
213 if( isCompressed ) { int fileSize = fob.getDWordAt(4);
215
216 if( fileSize < 21 ) {
217 throw new IVException( Resource.FILETOOSHORT, new Object [] {file.getFullName()} );
218 }
219
220 FlashBuffer fb;
221 try {
222 fb = new FlashBuffer(fileSize+8);
223 } catch( OutOfMemoryError e ) {
224 throw new IVException( Resource.FILETOOBIG, new Object [] {file.getFullName()} );
225 }
226
227 fb.writeArray(fob.getBuf(), 0, 8);
228
229 try {
230 fb.write( new InflaterInputStream(fob.getInputStream(8)) );
231 } catch( IOException e ) {
232 throw new IVException(e);
233 }
234 fob = fb;
235 }
236
237 file.setCompressed(isCompressed);
238 _parseBuffer(fob, file);
239 }
240
241
243 private void _parseBuffer( FlashBuffer fb, FlashFile file ) throws IVException {
244 this.file = file;
245
246 init( fb.getBuf(), 0, fb.getSize() );
247
248 file.setVersion( (int) getByteAt(3) );
250
251 setPos(8);
252
253 file.setFrameSize( getRect() );
255
256 file.setFrameRate( getUWord() );
258
259 file.setMainScript( Script.parse( this, true ) );
261 }
262
263 }
264 |
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