4741aa72 |
1 | /****************************************************************************** |
2 | * |
3 | * LDC2 source code |
4 | * |
d65ad4d7 |
5 | * $Date: 2007/03/26 03:20:31 $ |
4741aa72 |
6 | * $Author: hachti $ |
7 | * |
8 | * $Log: tape_block.cpp,v $ |
d65ad4d7 |
9 | * Revision 2.1 2007/03/26 03:20:31 hachti |
10 | * *** empty log message *** |
11 | * |
12 | * Revision 2.0 2007-03-26 01:00:40 hachti |
4741aa72 |
13 | * *** empty log message *** |
14 | * |
15 | * |
16 | ******************************************************************************/ |
7880ae2d |
17 | |
18 | #include <string> |
19 | #include <vector> |
20 | |
97b26985 |
21 | #include <stdlib.h> |
22 | #include <unistd.h> |
23 | #include <string.h> |
09cb0f4f |
24 | #include <stdio.h> |
6c06db96 |
25 | |
97b26985 |
26 | #include "tape_block.hh" |
7880ae2d |
27 | |
28 | #include "silent_code.hh" |
29 | #include "hw_constants.hh" |
30 | |
31 | #include "eot_block.hh" |
97b26985 |
32 | #include "data_block.hh" |
7880ae2d |
33 | #include "broken_block.hh" |
0ec6e042 |
34 | #include "data_block_0.hh" |
09cb0f4f |
35 | #include "data_block_0_0.hh" |
36 | #include "data_block_0_1.hh" |
37 | #include "data_block_0_2.hh" |
38 | #include "data_block_0_3.hh" |
39 | #include "data_block_0_4.hh" |
40 | #include "data_block_0_10.hh" |
41 | #include "data_block_0_14.hh" |
42 | #include "data_block_0_24.hh" |
43 | #include "data_block_0_44.hh" |
44 | #include "data_block_0_30.hh" |
45 | #include "data_block_0_54.hh" |
46 | #include "data_block_0_60.hh" |
47 | #include "data_block_0_50.hh" |
fd9632c0 |
48 | #include "data_block_0_64.hh" |
49 | #include "data_block_1.hh" |
50 | #include "data_block_2.hh" |
51 | #include "data_block_3.hh" |
52 | #include "data_block_4.hh" |
53 | #include "data_block_5.hh" |
54 | #include "data_block_6.hh" |
55 | #include "data_block_7.hh" |
97b26985 |
56 | |
6c06db96 |
57 | using namespace std; |
58 | |
59 | /***************************************************************/ |
60 | /*! |
61 | *\brief Destructor. |
62 | */ |
63 | tape_block::~tape_block(){ |
64 | free(raw_data); |
65 | free(word_data); |
66 | } |
67 | |
68 | /***************************************************************/ |
69 | /*! |
70 | *\brief Copy constructor. |
71 | */ |
72 | tape_block::tape_block(tape_block & org){ |
73 | operator=(org); |
74 | } |
75 | |
76 | /***************************************************************/ |
77 | /*! |
78 | *\brief Assignment operator. |
79 | */ |
80 | void tape_block::operator=(tape_block &org){ |
81 | block_type=org.block_type; |
fed2c751 |
82 | discarded_bytes=org.discarded_bytes; |
6c06db96 |
83 | raw_data=0; |
84 | raw_size=org.raw_size; |
85 | word_data=0; |
86 | word_size=org.word_size; |
87 | if (raw_size){ |
88 | raw_data=(unsigned char *)malloc(raw_size); |
89 | memcpy(raw_data,org.raw_data,raw_size); |
90 | } |
91 | if (word_size){ |
92 | word_data=(unsigned short *)malloc(word_size*sizeof(unsigned short)); |
93 | memcpy(word_data,org.word_data,word_size*sizeof(unsigned short)); |
94 | } |
95 | } |
96 | |
6c06db96 |
97 | /***************************************************************/ |
98 | /*! |
99 | *\brief Determine the block's type |
100 | * |
101 | * This routine returns the block's type.\\ |
102 | *\retval TBT_DATA if it's a data block |
103 | *\retval TBT_EOT if it's an end of tape mark |
6c06db96 |
104 | * |
105 | *\note This function is virtual. That means that if the tape block in |
106 | * question is of the subtype data_block which overwrites this method, |
107 | * it will return the block type contained in the upper 4 bits of the |
108 | * first data word! Try to avoid testing for TBT_DATA. \n |
109 | * Blocks generated by gen_from_fd should never have TBT_DATA. |
110 | */ |
111 | int tape_block::get_type(){ |
112 | return block_type; |
113 | } |
114 | |
115 | /***************************************************************/ |
116 | /*! |
117 | *\brief Determine the block's subtype |
118 | * |
119 | * Some data block types have a subtype. |
120 | *\note This is a virtual method and to be used in derived classes. |
121 | *\return Always 0 |
122 | */ |
123 | int tape_block::get_subtype(){ |
124 | return 0; |
125 | } |
126 | |
127 | /***************************************************************/ |
128 | /*! |
129 | *\brief Get a cleartext description of the block. |
130 | *\return ldc style descriptive line for the block |
131 | */ |
132 | vector<string> tape_block:: get_description(){ |
6c06db96 |
133 | vector<string> result; |
09cb0f4f |
134 | result.insert(result.end(), |
135 | "***** "+get_typestring()+"Untyped tape block"); |
6c06db96 |
136 | return result; |
137 | } |
138 | |
139 | /***************************************************************/ |
140 | /*! |
141 | *\brief Get size of the internal raw data buffer |
142 | *\return The size of the internal raw data buffer |
143 | */ |
144 | int tape_block::get_raw_size(){ |
145 | return raw_size; |
146 | } |
147 | |
fed2c751 |
148 | /***************************************************************/ |
149 | /*! |
150 | *\brief Get amount of bytes discarded before beginning |
151 | * of block sensed. |
152 | *\return Length of unusable tape before block start delimiter. |
153 | */ |
154 | int tape_block::get_discarded_bytes(){ |
155 | return discarded_bytes; |
156 | } |
157 | |
6c06db96 |
158 | /***************************************************************/ |
159 | /*! |
160 | *\brief Access internal raw data buffer |
161 | * |
d65ad4d7 |
162 | * The raw data buffer contains all block data except the |
163 | * block start and end delimiters. |
6c06db96 |
164 | *\return Pointer to internal raw data buffer of the block |
165 | */ |
166 | unsigned char * tape_block::get_raw_data(){ |
167 | return raw_data; |
168 | } |
169 | |
874a2bd8 |
170 | /***************************************************************/ |
171 | /*! |
172 | *\brief Dump contents of the block to a file descriptor. |
173 | * |
174 | *\param fd A writable file descriptor. |
175 | *\return Always zero. |
176 | *\throw io_error_exception A write error occured. |
177 | */ |
178 | int tape_block::dump_to_fd(int fd){ |
179 | int to_write=raw_size; |
180 | unsigned char * dump_ptr=raw_data; |
181 | int written; |
182 | while (to_write) { |
183 | written=write(fd,dump_ptr,to_write); |
184 | if (written < 0) throw io_error_exception(); |
185 | to_write-=written; |
186 | dump_ptr+=written; |
187 | } |
188 | return 0; |
189 | } |
190 | |
191 | /***************************************************************/ |
192 | /*! |
193 | *\brief Determine if the block marks the end of an object |
194 | *\retval true The block marks the end of an object. |
195 | *\retval false The block does not mark the end of an object. |
196 | *\note This is only a virtual method returning always false. |
197 | * Classes which can be the legal last block of an object |
198 | * will overwrite this method so that it returns true. |
199 | */ |
200 | bool tape_block::is_endblock(){ |
201 | return false; |
202 | } |
203 | |
204 | /***************************************************************/ |
205 | /*! |
206 | *\brief Get exported symbols. |
207 | *\return A vector containing any symbols exported in this block. |
208 | *\note This is only a virtual method returning always an empty |
209 | * vector. Classes describing appropriate data blocks |
210 | * will override this method. |
211 | */ |
212 | vector<string> tape_block::get_exported_symbols(){ |
213 | vector<string> result; |
214 | return result; |
215 | } |
216 | |
217 | /***************************************************************/ |
218 | /*! |
219 | *\brief Get called symbols. |
220 | *\return A vector containing any symbols called in this block. |
221 | *\note This is only a virtual method returning always an empty |
222 | * vector. Classes describing appropriate data blocks |
223 | * will override this method. |
224 | */ |
225 | vector<string> tape_block::get_called_symbols(){ |
226 | vector<string> result; |
227 | return result; |
228 | } |
229 | |
230 | /***************************************************************/ |
231 | /*! |
232 | *\brief Determine if the block has a known type. |
233 | *\return true if type and subtype are known. |
234 | *\return false if the block type is not one of the valid end |
235 | * nodes of the type tree. |
236 | */ |
237 | bool tape_block::has_known_type(){ |
238 | return m_has_known_type; |
239 | } |
240 | |
6c06db96 |
241 | /***************************************************************/ |
242 | /*! |
7880ae2d |
243 | *\brief Static factory method for tape blocks. |
6c06db96 |
244 | * |
245 | * This method creates a tape_block by using the private |
09cb0f4f |
246 | * constructor with file descriptor support.\n |
7880ae2d |
247 | * |
6c06db96 |
248 | * The factory method tries to determine the block's type and then |
249 | * looks for appropriate subclasses. If there's an appropriate |
250 | * subclass fitting the newly-created object, an |
251 | * object of the subclass will be created and a pointer to this |
252 | * object will be returned to the caller.\n |
253 | * This allows for easy use of the object using it's virtual |
254 | * interface methods or a cast of the pointer to a sub type pointer |
255 | * according to the type information, and then using the subtype's |
09cb0f4f |
256 | * methods not already present in tape_block.\n |
257 | * Objects of the following subclasses are automagically generated:\n |
6c06db96 |
258 | * - eot_block |
259 | * - data_block |
09cb0f4f |
260 | * - data_block_0 |
261 | * - data_block_0_0 |
262 | * - data_block_0_1 |
263 | * - data_block_0_2 |
264 | * - data_block_0_3 |
265 | * - data_block_0_4 |
266 | * - data_block_0_10 |
267 | * - data_block_0_14 |
268 | * - data_block_0_24 |
269 | * - data_block_0_30 |
270 | * - data_block_0_50 |
271 | * - data_block_0_54 |
272 | * - data_block_0_60 |
fd9632c0 |
273 | * - data_block_0_64 |
09cb0f4f |
274 | * - data_block_1 |
275 | * - data_block_2 |
276 | * - data_block_3 |
277 | * - data_block_4 |
278 | * - data_block_5 |
279 | * - data_block_6 |
280 | * - data_block_7 |
6c06db96 |
281 | * |
7880ae2d |
282 | *\return Pointer to an instance of tape_block or a subclass. |
283 | *\param fd A file descriptor where data can be read from. |
6c06db96 |
284 | *\param input_start A pointer to a function |
285 | * called before reading data from fd. |
286 | *\param input_stop A pointer to a function |
287 | * called after reading data from fd. |
288 | * |
289 | *\param start_stop_arg A pointer passed to input_start |
290 | * and input_stop(). Can be anything. |
291 | */ |
0ec6e042 |
292 | tape_block * tape_block::gen_from_fd(int fd, |
293 | void(*input_start)(void *), |
294 | void (*input_stop)(void *), |
295 | void * start_stop_arg) |
97b26985 |
296 | { |
fd9632c0 |
297 | tape_block * n_tape_block=0; |
298 | data_block * n_data_block=0; |
299 | data_block * n_data_block_x=0; |
300 | data_block_0 * n_data_block_0=0; |
301 | data_block_0 * n_data_block_0_x=0; |
302 | eot_block * n_eot_block=0; |
7880ae2d |
303 | broken_block * n_broken_block=0; |
304 | |
50c86ded |
305 | //Use the private constructor which reads in the block from a file descriptor |
7880ae2d |
306 | try{ |
fd9632c0 |
307 | n_tape_block=new tape_block(fd,input_start,input_stop,start_stop_arg); |
7880ae2d |
308 | } |
fd9632c0 |
309 | |
7880ae2d |
310 | catch(checksum_error_exception e){ |
311 | n_broken_block=new broken_block(*(e.get_block())); |
312 | delete e.get_block(); |
313 | throw checksum_error_exception(n_broken_block); |
314 | } |
315 | |
316 | // Retype to data_block, eot_block - if possible |
fd9632c0 |
317 | switch(n_tape_block->get_type()){ |
318 | case tape_block::TBT_DATA: |
319 | n_data_block = new data_block(*n_tape_block); |
0ec6e042 |
320 | break; |
09cb0f4f |
321 | case tape_block::TBT_EOT: |
fd9632c0 |
322 | n_eot_block=new eot_block(*n_tape_block); |
323 | delete n_tape_block; |
874a2bd8 |
324 | n_eot_block->m_has_known_type=true; |
fd9632c0 |
325 | return n_eot_block; |
50c86ded |
326 | default: // Unknown block, a bad thing! |
327 | return n_tape_block; |
0ec6e042 |
328 | } |
fd9632c0 |
329 | delete n_tape_block; |
330 | |
331 | // Now only data blocks are left |
332 | |
333 | switch(n_data_block->get_type()){ |
334 | case 00: n_data_block_0=new data_block_0(*n_data_block); break; |
335 | case 01: n_data_block_x=new data_block_1(*n_data_block); break; |
336 | case 02: n_data_block_x=new data_block_2(*n_data_block); break; |
337 | case 03: n_data_block_x=new data_block_3(*n_data_block); break; |
338 | case 04: n_data_block_x=new data_block_4(*n_data_block); break; |
339 | case 05: n_data_block_x=new data_block_5(*n_data_block); break; |
340 | case 06: n_data_block_x=new data_block_6(*n_data_block); break; |
341 | case 07: n_data_block_x=new data_block_7(*n_data_block); break; |
0ec6e042 |
342 | default: |
fd9632c0 |
343 | return n_data_block; |
344 | } |
345 | if (n_data_block_0==0){ // So we must have found another one |
346 | delete n_data_block; |
874a2bd8 |
347 | n_data_block_x->m_has_known_type=true; |
fd9632c0 |
348 | return n_data_block_x; |
0ec6e042 |
349 | } |
0ec6e042 |
350 | |
fd9632c0 |
351 | // Here only type 0 left |
fd9632c0 |
352 | switch(n_data_block_0->get_subtype()){ |
353 | case 000: n_data_block_0_x=new data_block_0_0(*n_data_block_0); break; |
354 | case 001: n_data_block_0_x=new data_block_0_1(*n_data_block_0); break; |
355 | case 002: n_data_block_0_x=new data_block_0_2(*n_data_block_0); break; |
356 | case 003: n_data_block_0_x=new data_block_0_3(*n_data_block_0); break; |
de6b6757 |
357 | case 004: n_data_block_0_x=new data_block_0_4(*n_data_block_0); break; |
fd9632c0 |
358 | case 010: n_data_block_0_x=new data_block_0_10(*n_data_block_0); break; |
359 | case 014: n_data_block_0_x=new data_block_0_14(*n_data_block_0); break; |
360 | case 024: n_data_block_0_x=new data_block_0_24(*n_data_block_0); break; |
361 | case 044: n_data_block_0_x=new data_block_0_44(*n_data_block_0); break; |
362 | case 030: n_data_block_0_x=new data_block_0_30(*n_data_block_0); break; |
363 | case 054: n_data_block_0_x=new data_block_0_54(*n_data_block_0); break; |
364 | case 060: n_data_block_0_x=new data_block_0_60(*n_data_block_0); break; |
365 | case 064: n_data_block_0_x=new data_block_0_64(*n_data_block_0); break; |
366 | case 050: n_data_block_0_x=new data_block_0_50(*n_data_block_0); break; |
0ec6e042 |
367 | default: |
fd9632c0 |
368 | return n_data_block_0; |
0ec6e042 |
369 | } |
fd9632c0 |
370 | delete n_data_block_0; |
874a2bd8 |
371 | n_data_block_0_x->m_has_known_type=true; |
fd9632c0 |
372 | return n_data_block_0_x; |
97b26985 |
373 | } |
374 | |
6c06db96 |
375 | /***************************************************************/ |
0ec6e042 |
376 | /*! |
377 | *\brief Default constructor. |
378 | */ |
379 | tape_block::tape_block(){} |
380 | |
09cb0f4f |
381 | /***************************************************************/ |
382 | /*! |
383 | *\brief get a short type description string. |
384 | *\return A small string to be used in description methods. |
385 | * |
386 | * The string is always 19 characters long.\n |
387 | * An example is "(99-99) ". |
388 | */ |
389 | string tape_block::get_typestring(){ |
390 | char buffer[13]; |
391 | sprintf(buffer,"(%o-%o) ",get_type(),get_subtype()); |
392 | buffer[10]=0; |
393 | return string(buffer); |
394 | } |
0ec6e042 |
395 | |
6c06db96 |
396 | /***************************************************************/ |
0ec6e042 |
397 | /*! |
398 | *\brief Automatic constructor with file descriptor support |
399 | * |
7880ae2d |
400 | * This constructor is used to initialise the block read in the |
401 | * block's data via a file descriptor.\n |
0ec6e042 |
402 | * This is done in the following way: |
403 | * - input_start() is called. |
404 | * - Data is read from fd. Stops on end of file or end of block |
405 | * or IO error. On EOF or IO error input_stop() is NOT called. |
406 | * - If there was no IO error the block's checksum is calculated |
407 | * and checked. |
408 | * - The block's type field is initialised. |
409 | * - input_stop() is called. |
410 | * |
411 | *\param fd A file descriptor where the read is taken from |
412 | *\param input_stop A pointer to a function called at the end of input |
413 | *\param input_start A pointer to a function called at the beginning |
414 | * of input |
415 | *\param start_stop_arg A pointer passed to input_start and input_stop(). |
416 | */ |
97b26985 |
417 | tape_block::tape_block (int fd, |
418 | void(*input_start)(void *), |
419 | void (*input_stop)(void *), |
420 | void * start_stop_arg |
421 | ) |
422 | { |
423 | unsigned char buffer; |
424 | int retval; |
425 | int eot_needed=EOT_LENGTH; |
426 | int eob_needed=EOB_LENGTH; |
427 | int block_complete=0; |
428 | |
7880ae2d |
429 | block_type= TBT_BROKEN; |
fed2c751 |
430 | discarded_bytes=0; |
97b26985 |
431 | raw_data = 0; |
432 | raw_size = 0; |
433 | word_data = 0; |
434 | word_size = 0; |
fed2c751 |
435 | poolsize = 1024; |
436 | |
437 | // Get initial portion of memory |
438 | raw_data=(unsigned char*)malloc(poolsize); |
439 | |
97b26985 |
440 | if (input_start) input_start (start_stop_arg); |
441 | |
442 | /* Look for block start in input stream */ |
443 | do { |
444 | retval=read(fd, &buffer, 1); |
445 | if (retval == 0){ // End of file |
7880ae2d |
446 | free(raw_data); |
447 | throw eof_legal_exception(discarded_bytes); |
97b26985 |
448 | return; |
449 | } |
450 | if (retval == -1){ // Error reading from fd |
7880ae2d |
451 | free(raw_data); |
452 | throw io_error_exception(); |
97b26985 |
453 | return; |
454 | } |
fed2c751 |
455 | discarded_bytes++; |
97b26985 |
456 | |
457 | /* Look for end ot tape sequence */ |
458 | switch(eot_needed){ |
459 | case 3: |
460 | if (buffer==EOT_SEQ_1) eot_needed--; |
461 | else eot_needed=EOT_LENGTH; |
462 | break; |
463 | case 2: |
464 | if (buffer==EOT_SEQ_2) eot_needed--; |
465 | else eot_needed=EOT_LENGTH; |
466 | break; |
467 | case 1: |
468 | if (buffer==EOT_SEQ_3){ |
7880ae2d |
469 | raw_data=(unsigned char*)realloc(raw_data,3); |
97b26985 |
470 | raw_size=3; |
fed2c751 |
471 | discarded_bytes-=3; |
97b26985 |
472 | raw_data[0]=EOT_SEQ_1; |
473 | raw_data[1]=EOT_SEQ_2; |
474 | raw_data[2]=EOT_SEQ_3; |
475 | block_type =TBT_EOT; |
97b26985 |
476 | return; |
477 | } |
478 | else eot_needed=EOT_LENGTH; |
479 | break; |
480 | } |
481 | } while (buffer != (unsigned char) BLOCK_START_DELIMITER); |
874a2bd8 |
482 | discarded_bytes--; // Don't want to declare the start delimiter discarded! |
fed2c751 |
483 | raw_size=1; // But we want to account it here! |
874a2bd8 |
484 | |
97b26985 |
485 | /* Now input the block data */ |
486 | block_complete = 0; |
874a2bd8 |
487 | |
488 | raw_data[0]=buffer; // Put the start delimiter in! |
489 | |
97b26985 |
490 | do { |
491 | retval = read (fd, &buffer, 1); |
492 | |
493 | if (retval == 0){ // End of file |
7880ae2d |
494 | broken_block * b_block=new broken_block(*this); |
495 | free(raw_data); |
496 | throw eof_illegal_exception(b_block); |
97b26985 |
497 | } |
498 | if (retval == -1){ // Error reading from fd |
7880ae2d |
499 | free(raw_data); |
500 | throw io_error_exception(); |
97b26985 |
501 | } |
97b26985 |
502 | |
503 | /* sort in the new byte */ |
504 | raw_size++; |
fed2c751 |
505 | // Need more memory?? |
874a2bd8 |
506 | if (raw_size>poolsize){ |
fed2c751 |
507 | poolsize+=1024; |
508 | raw_data=(unsigned char*)realloc(raw_data,poolsize); |
509 | } |
510 | |
874a2bd8 |
511 | raw_data[raw_size-1]=buffer; |
97b26985 |
512 | |
513 | /* Look for end ot block sequence */ |
514 | switch(eob_needed){ |
515 | case 2: |
516 | if (buffer==BLOCK_END_DELIMITER_1) eob_needed--; |
517 | else eob_needed=EOB_LENGTH; |
518 | break; |
519 | case 1: |
520 | if (buffer==BLOCK_END_DELIMITER_2){ |
97b26985 |
521 | block_complete=1; |
522 | } |
523 | else eob_needed=EOB_LENGTH; |
524 | break; |
525 | } |
526 | }while (!block_complete); |
7880ae2d |
527 | |
97b26985 |
528 | if (input_stop) input_stop (start_stop_arg); |
529 | |
7880ae2d |
530 | |
97b26985 |
531 | /* Now we have the data in. */ |
532 | |
533 | if (init_words()!=0){ |
7880ae2d |
534 | broken_block * b_block=new broken_block(*this); |
535 | free(raw_data); |
536 | free(word_data); |
537 | throw checksum_error_exception(b_block); |
97b26985 |
538 | } |
7880ae2d |
539 | |
97b26985 |
540 | if (test_checksum()!=0){ |
7880ae2d |
541 | broken_block * b_block=new broken_block(*this); |
542 | free(raw_data); |
543 | free(word_data); |
544 | throw checksum_error_exception(b_block); |
97b26985 |
545 | } |
97b26985 |
546 | block_type=TBT_DATA; |
97b26985 |
547 | } |
548 | |
97b26985 |
549 | |
6c06db96 |
550 | /***************************************************************/ |
0ec6e042 |
551 | /*! |
6c06db96 |
552 | *\brief Initialize word representation of data. |
553 | *\retval 0 on success. |
554 | *\retval 1 on error. |
0ec6e042 |
555 | */ |
97b26985 |
556 | int tape_block::init_words(){ |
874a2bd8 |
557 | word_size=(raw_size-EOB_LENGTH-1)/3; |
97b26985 |
558 | if (word_size<MINIMUM_DATA_BLOCK_WORDSIZE) return 1; // Block too short! |
7880ae2d |
559 | word_data=(unsigned short *)malloc(word_size*sizeof(unsigned short)); |
97b26985 |
560 | for (int pos=0; pos<word_size; pos++) |
874a2bd8 |
561 | word_data[pos]=combine466(raw_data+1+3*pos); |
97b26985 |
562 | return 0; |
563 | } |
564 | |
6c06db96 |
565 | /***************************************************************/ |
0ec6e042 |
566 | /*! |
6c06db96 |
567 | *\brief Calculate and check checksum. |
568 | *\retval 0 on success. |
569 | *\retval 1 on error. |
0ec6e042 |
570 | */ |
97b26985 |
571 | int tape_block::test_checksum(){ |
572 | unsigned short sum=0; |
573 | for (int pos=0; pos<word_size-1;pos++) |
0ec6e042 |
574 | sum^=word_data[pos]; |
97b26985 |
575 | if (sum==word_data[word_size-1]) return 0; |
576 | else return 1; |
577 | } |
6c06db96 |
578 | |
7880ae2d |
579 | /***************************************************************/ |
580 | /*! |
581 | *\brief Standard constructor of exception base class. |
582 | */ |
583 | tape_block::exception::exception(){ |
584 | } |
585 | |
586 | /***************************************************************/ |
587 | /*! |
588 | *\brief Standard desctructor. |
589 | */ |
590 | tape_block::exception::~exception(){ |
591 | } |
592 | |
593 | /***************************************************************/ |
594 | /*! |
595 | *\brief Get pointer to erroneous tape_block |
596 | *\return A pointer to a tape_block instance. |
597 | *\note The user has to take care to free the instance contained |
598 | * in objects of classes supporting this method. |
599 | */ |
600 | tape_block * tape_block::exception::get_block(){ |
601 | return m_broken_block; |
602 | } |
603 | |
604 | /***************************************************************/ |
605 | /*! |
606 | *\brief Constructor |
607 | */ |
608 | tape_block::checksum_error_exception:: |
609 | checksum_error_exception (tape_block * broken_block){ |
610 | this->m_broken_block=broken_block; |
611 | } |
612 | |
613 | /***************************************************************/ |
614 | /*! |
615 | *\brief Constructor |
616 | */ |
617 | tape_block::eof_illegal_exception:: |
618 | eof_illegal_exception (tape_block * broken_block){ |
619 | this->m_broken_block=broken_block; |
620 | } |
621 | |
622 | /***************************************************************/ |
623 | /*! |
624 | *\brief Constructor |
625 | *\param bytes_consumed Amount of bytes read while looking |
626 | * for a block. |
627 | */ |
628 | tape_block::eof_legal_exception:: |
629 | eof_legal_exception(int bytes_consumed){ |
630 | this->m_broken_block=NULL; |
631 | this->bytes_consumed=bytes_consumed; |
632 | } |
633 | |
634 | /***************************************************************/ |
635 | /*! |
636 | *\brief Get amount of consumed data before EOF came along. |
d65ad4d7 |
637 | *\return Amount of bytes read from fd while looking for |
7880ae2d |
638 | * new block or EOF. |
639 | */ |
640 | int tape_block::eof_legal_exception::get_consumed(){ |
641 | return bytes_consumed; |
642 | } |
643 | |
644 | /***************************************************************/ |
645 | /*! |
646 | *\brief Constructor |
647 | */ |
648 | tape_block::io_error_exception:: |
649 | io_error_exception(){ |
650 | this->m_broken_block=NULL; |
651 | } |
652 | |
653 | |
654 | |
655 | |
656 | |
657 | |