GCC Code Coverage Report

Directory: src/gate/
File: src/gate/encode/bzip2streams.c
Date: 2025-12-12 23:40:09
Exec Total Coverage
Lines: 169 209 80.9%
Functions: 20 20 100.0%
Branches: 49 91 53.8%
Line Branch Exec Source
1 /* GATE PROJECT LICENSE:
2 +----------------------------------------------------------------------------+
3 | Copyright(c) 2018-2025, Stefan Meislinger <sm@opengate.at> |
4 | All rights reserved. |
5 | |
6 | Redistribution and use in source and binary forms, with or without |
7 | modification, are permitted provided that the following conditions are met:|
8 | |
9 | 1. Redistributions of source code must retain the above copyright notice, |
10 | this list of conditions and the following disclaimer. |
11 | 2. Redistributions in binary form must reproduce the above copyright |
12 | notice, this list of conditions and the following disclaimer in the |
13 | documentation and/or other materials provided with the distribution. |
14 | |
15 | THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"|
16 | AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
17 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
18 | ARE DISCLAIMED.IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE |
19 | LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
20 | CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
21 | SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
22 | INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
23 | CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
24 | ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF |
25 | THE POSSIBILITY OF SUCH DAMAGE. |
26 +----------------------------------------------------------------------------+
27 */
28
29 #include "gate/encode/bzip2streams.h"
30 #include "gate/memalloc.h"
31 #include "gate/atomics.h"
32 #include "gate/results.h"
33 #include "gate/debugging.h"
34
35 #if defined(GATE_EXTLIB_BZIP2) && !defined(GATE_ENCODE_NO_ADVANCED_COMPRESSION)
36 # define GATE_ENCODE_BZIP2_USE_LIBBZ2 1
37 #else
38 # define GATE_ENCODE_BZIP2_NO_IMPL 1
39 #endif
40
41
42
43 #if defined(GATE_ENCODE_BZIP2_USE_LIBBZ2)
44 #include "bzlib.h"
45
46 #include <assert.h>
47
48 /* output stream encoder implementation */
49
50 static void gate_bzip2encoder_release_impl(void* self);
51 static int gate_bzip2encoder_retain_impl(void* self);
52 1 static char const* gate_bzip2encoder_interface_name_impl(void* self)
53 {
54 (void)self;
55 1 return GATE_INTERFACE_NAME_STREAM;
56 }
57 static gate_result_t gate_bzip2encoder_read_impl(void* self, char* buffer, gate_size_t bufferlength, gate_size_t* returned);
58 static gate_result_t gate_bzip2encoder_peek_impl(void* self, char* buffer, gate_size_t bufferlength, gate_size_t* returned);
59 static gate_result_t gate_bzip2encoder_write_impl(void* self, char const* buffer, gate_size_t bufferlength, gate_size_t* written);
60 static gate_result_t gate_bzip2encoder_flush_impl(void* self);
61
62 static GATE_INTERFACE_VTBL(gate_stream) gate_bzip2encoder_vtbl;
63 1 static void gate_init_bzip2encoder_vtbl()
64 {
65
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 1 if (!gate_bzip2encoder_vtbl.get_interface_name)
66 {
67 GATE_INTERFACE_VTBL(gate_stream) const local_vtbl =
68 {
69 &gate_bzip2encoder_interface_name_impl,
70 &gate_bzip2encoder_release_impl,
71 &gate_bzip2encoder_retain_impl,
72 &gate_bzip2encoder_read_impl,
73 &gate_bzip2encoder_peek_impl,
74 &gate_bzip2encoder_write_impl,
75 &gate_bzip2encoder_flush_impl
76 };
77 1 gate_bzip2encoder_vtbl = local_vtbl;
78 }
79 1 }
80
81 typedef struct gate_bzip2encoder_impl
82 {
83 GATE_INTERFACE_VTBL(gate_stream)* vtbl;
84
85 gate_atomic_int_t ref_counter;
86 gate_stream_t* dest_stream;
87 bz_stream encoder;
88 char data_buffer[GATE_MAX_BLOCK_COPYBUFFER_LENGTH];
89 gate_size_t data_buffer_used;
90
91 } gate_bzip2encoder_impl_t;
92
93 4 static void* gate_bzip2_bzalloc(void* opaque, int items, int size)
94 {
95 4 void* ret = NULL;
96 4 gate_size_t mem_alloc_size = (gate_size_t)items * (gate_size_t)size;
97
98 (void)opaque;
99 4 ret = gate_mem_alloc(mem_alloc_size);
100 if (!ret)
101 {
102 GATE_DEBUG_ASSERT("bzalloc() failed");
103 }
104 4 return ret;
105 }
106
107 4 static void gate_bzip2_bzfree(void* opaque, void* addr)
108 {
109 (void)opaque;
110
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 4 if (addr)
111 {
112 4 gate_mem_dealloc(addr);
113 }
114 4 }
115
116 1 gate_result_t gate_bzip2_encoder_create(gate_stream_t* output, gate_int16_t compression, gate_stream_t** ptr2streamptr)
117 {
118 gate_result_t ret;
119 gate_bzip2encoder_impl_t* impl;
120 int bzresult;
121 1 int level = 5;
122 do
123 {
124
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 1 if ((output == NULL) || (ptr2streamptr == NULL))
125 {
126 ✗ GATE_DEBUG_TRACE("bzip2_encoder null pointer");
127 ✗ ret = GATE_RESULT_NULLPOINTER;
128 ✗ break;
129 }
130
131 1 impl = (gate_bzip2encoder_impl_t*)gate_mem_alloc(sizeof(gate_bzip2encoder_impl_t));
132
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 1 if (impl == NULL)
133 {
134 ✗ GATE_DEBUG_TRACE("failed to allocate bzip2encoder");
135 ✗ ret = GATE_RESULT_OUTOFMEMORY;
136 ✗ break;
137 }
138
139 1 gate_mem_clear(impl, sizeof(gate_bzip2encoder_impl_t));
140 1 gate_init_bzip2encoder_vtbl();
141 1 impl->vtbl = &gate_bzip2encoder_vtbl;
142 1 gate_atomic_int_init(&impl->ref_counter, 1);
143 1 impl->encoder.bzalloc = &gate_bzip2_bzalloc;
144 1 impl->encoder.bzfree = &gate_bzip2_bzfree;
145 1 impl->dest_stream = output;
146
147
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 1 switch (compression)
148 {
149 ✗ case GATE_BZIP2_COMPRESSION_MINIMUM: level = 1; break;
150 ✗ case GATE_BZIP2_COMPRESSION_LOW: level = 3; break;
151 1 case GATE_BZIP2_COMPRESSION_MEDIUM: level = 5; break;
152 ✗ case GATE_BZIP2_COMPRESSION_HIGH: level = 7; break;
153 ✗ case GATE_BZIP2_COMPRESSION_MAXIMUM: level = 9; break;
154 }
155 1 bzresult = BZ2_bzCompressInit(&impl->encoder, level, 0, 0);
156
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 1 if (bzresult != BZ_OK)
157 {
158 ✗ GATE_DEBUG_TRACE_MSG_VALUE("BZ2_bzCompressInit() failed", bzresult);
159 ✗ gate_mem_dealloc(impl);
160 ✗ ret = GATE_RESULT_FAILED;
161 ✗ break;
162 }
163
164 1 impl->data_buffer_used = 0;
165
166 1 gate_object_retain(impl->dest_stream);
167 1 *ptr2streamptr = (gate_stream_t*)impl;
168
169 1 ret = GATE_RESULT_OK;
170 } while (0);
171
172 1 return ret;
173 }
174
175 2 static void gate_bzip2encoder_release_impl(void* self)
176 {
177 2 gate_bzip2encoder_impl_t* impl = (gate_bzip2encoder_impl_t*)self;
178
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 2 if (gate_atomic_int_dec(&impl->ref_counter) == 0)
179 {
180 1 gate_bzip2encoder_flush_impl(self);
181 1 BZ2_bzCompressEnd(&impl->encoder);
182 1 gate_object_release(impl->dest_stream);
183 1 gate_mem_dealloc(impl);
184 }
185 2 }
186 1 static int gate_bzip2encoder_retain_impl(void* self)
187 {
188 1 gate_bzip2encoder_impl_t* impl = (gate_bzip2encoder_impl_t*)self;
189 1 return gate_atomic_int_inc(&impl->ref_counter);
190 }
191 1 static gate_result_t gate_bzip2encoder_read_impl(void* self, char* buffer, gate_size_t bufferlength, gate_size_t* returned)
192 {
193 (void)self;
194 (void)buffer;
195 (void)bufferlength;
196 (void)returned;
197 1 return GATE_RESULT_NOTSUPPORTED;
198 }
199 1 static gate_result_t gate_bzip2encoder_peek_impl(void* self, char* buffer, gate_size_t bufferlength, gate_size_t* returned)
200 {
201 (void)self;
202 (void)buffer;
203 (void)bufferlength;
204 (void)returned;
205 1 return GATE_RESULT_NOTSUPPORTED;
206 }
207 10 static gate_result_t gate_bzip2encoder_write_impl(void* self, char const* buffer, gate_size_t bufferlength, gate_size_t* written)
208 {
209 10 gate_result_t ret = GATE_RESULT_OK;
210 10 gate_bzip2encoder_impl_t* impl = (gate_bzip2encoder_impl_t*)self;
211 char compressed_buffer[GATE_MAX_STACK_COPYBUFFER_LENGTH];
212 10 gate_size_t bytesavailable = sizeof(impl->data_buffer) - impl->data_buffer_used;
213 10 gate_size_t bytesaccepted = bytesavailable < bufferlength ? bytesavailable : bufferlength;
214 int bzresult;
215 gate_size_t bytescompressed;
216 gate_size_t byteswritten;
217 gate_size_t bytesremaining;
218
219 do
220 {
221 10 gate_mem_copy(&impl->data_buffer[impl->data_buffer_used], buffer, bytesaccepted);
222
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 10 if (written != NULL)
223 {
224 10 *written = bytesaccepted;
225 }
226 10 impl->data_buffer_used += bytesaccepted;
227
228
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 10 if (impl->data_buffer_used == 0)
229 {
230 ✗ ret = GATE_RESULT_INVALIDARG;
231 ✗ break;
232 }
233
234 10 impl->encoder.avail_in = (unsigned int)impl->data_buffer_used;
235 10 impl->encoder.next_in = &impl->data_buffer[0];
236
237
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 10 while (impl->encoder.avail_in != 0)
238 {
239 10 impl->encoder.avail_out = sizeof(compressed_buffer);
240 10 impl->encoder.next_out = &compressed_buffer[0];
241
242 10 bzresult = BZ2_bzCompress(&impl->encoder, BZ_RUN);
243
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 10 if ((bzresult != BZ_OK) && (bzresult != BZ_RUN_OK) && (bzresult != BZ_STREAM_END))
244 {
245 ✗ ret = GATE_RESULT_FAILED;
246 ✗ break;
247 }
248 10 bytescompressed = sizeof(compressed_buffer) - impl->encoder.avail_out;
249
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 10 if (bytescompressed > 0)
250 {
251 ✗ ret = gate_stream_write_block(impl->dest_stream, &compressed_buffer[0], bytescompressed, &byteswritten);
252 ✗ if (GATE_FAILED(ret))
253 {
254 ✗ break;
255 }
256 }
257 else
258 {
259 10 break;
260 }
261 }
262
263
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 10 if (impl->encoder.avail_in != 0)
264 {
265 ✗ bytesremaining = impl->encoder.avail_in;
266 ✗ gate_mem_move(&impl->data_buffer[0], &impl->data_buffer[impl->data_buffer_used - bytesremaining], bytesremaining);
267 ✗ impl->data_buffer_used = bytesremaining;
268 }
269 else
270 {
271 10 impl->data_buffer_used = 0;
272 }
273 } while (0);
274 10 return ret;
275 }
276 2 static gate_result_t gate_bzip2encoder_flush_impl(void* self)
277 {
278 2 gate_result_t ret = GATE_RESULT_OK;
279 2 gate_bzip2encoder_impl_t* impl = (gate_bzip2encoder_impl_t*)self;
280 char compressed_buffer[GATE_MAX_STACK_COPYBUFFER_LENGTH];
281 int bzresult;
282 gate_size_t bytescompressed;
283 gate_size_t byteswritten;
284 gate_size_t bytesoffset;
285
286 do
287 {
288 2 impl->encoder.next_in = &impl->data_buffer[0];
289 2 impl->encoder.avail_in = (unsigned int)impl->data_buffer_used;
290
291 2 impl->encoder.avail_out = sizeof(compressed_buffer);
292 2 impl->encoder.next_out = &compressed_buffer[0];
293
294 2 bzresult = BZ2_bzCompress(&impl->encoder, BZ_FINISH);
295
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 2 if ((bzresult != BZ_OK) && (bzresult != BZ_FINISH_OK) && (bzresult != BZ_STREAM_END))
296 {
297 1 ret = GATE_RESULT_FAILED;
298 1 break;
299 }
300
301 1 bytescompressed = sizeof(compressed_buffer) - impl->encoder.avail_out;
302 1 ret = gate_stream_write_block(impl->dest_stream, compressed_buffer, bytescompressed, &byteswritten);
303
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 1 if (GATE_FAILED(ret))
304 {
305 ✗ break;
306 }
307
308
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 1 if (impl->encoder.avail_in < impl->data_buffer_used)
309 {
310 ✗ bytesoffset = impl->data_buffer_used - impl->encoder.avail_in;
311 ✗ gate_mem_move(&impl->data_buffer[0], &impl->data_buffer[bytesoffset], impl->encoder.avail_in);
312 ✗ impl->data_buffer_used = impl->encoder.avail_in;
313 }
314
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 1 } while (impl->encoder.avail_out == 0);
315
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 2 if (GATE_SUCCEEDED(ret))
316 {
317 1 ret = gate_stream_flush(impl->dest_stream);
318 }
319 2 return ret;
320 }
321
322
323
324
325 /* input stream decoder implementation */
326
327 static void gate_bzip2decoder_release_impl(void* self);
328 static int gate_bzip2decoder_retain_impl(void* self);
329 2 static char const* gate_bzip2decoder_interface_name_impl(void* self)
330 {
331 GATE_UNUSED_ARG(self);
332 2 return GATE_INTERFACE_NAME_STREAM;
333 }
334 static gate_result_t gate_bzip2decoder_read_impl(void* self, char* buffer, gate_size_t bufferlength, gate_size_t* returned);
335 static gate_result_t gate_bzip2decoder_peek_impl(void* self, char* buffer, gate_size_t bufferlength, gate_size_t* returned);
336 static gate_result_t gate_bzip2decoder_write_impl(void* self, char const* buffer, gate_size_t bufferlength, gate_size_t* written);
337 static gate_result_t gate_bzip2decoder_flush_impl(void* self);
338
339 static GATE_INTERFACE_VTBL(gate_stream) gate_bzip2decoder_vtbl;
340 1 static void gate_init_bzip2decoder_vtbl()
341 {
342
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 1 if (!gate_bzip2decoder_vtbl.get_interface_name)
343 {
344 GATE_INTERFACE_VTBL(gate_stream) const local_vtbl =
345 {
346 &gate_bzip2decoder_interface_name_impl,
347 &gate_bzip2decoder_release_impl,
348 &gate_bzip2decoder_retain_impl,
349 &gate_bzip2decoder_read_impl,
350 &gate_bzip2decoder_peek_impl,
351 &gate_bzip2decoder_write_impl,
352 &gate_bzip2decoder_flush_impl
353 };
354 1 gate_bzip2decoder_vtbl = local_vtbl;
355 }
356 1 }
357
358 typedef struct gate_bzip2decoder_impl
359 {
360 GATE_INTERFACE_VTBL(gate_stream)* vtbl;
361
362 gate_atomic_int_t ref_counter;
363 gate_stream_t* source_stream;
364 bz_stream decoder;
365 char source_buffer[GATE_MAX_BLOCK_COPYBUFFER_LENGTH];
366 char decoded_buffer[GATE_MAX_BLOCK_COPYBUFFER_LENGTH];
367 gate_size_t decoded_buffer_length;
368 gate_size_t decoded_buffer_offset;
369
370 } gate_bzip2decoder_impl_t;
371
372 1 gate_result_t gate_bzip2_decoder_create(gate_stream_t* input, gate_stream_t** ptr2streamptr)
373 {
374 gate_result_t ret;
375 gate_bzip2decoder_impl_t* impl;
376 int bzresult;
377
378 do
379 {
380
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 1 if ((input == NULL) || (ptr2streamptr == NULL))
381 {
382 ✗ ret = GATE_RESULT_NULLPOINTER;
383 ✗ break;
384 }
385 1 impl = (gate_bzip2decoder_impl_t*)gate_mem_alloc(sizeof(gate_bzip2decoder_impl_t));
386
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 1 if (impl == NULL)
387 {
388 ✗ ret = GATE_RESULT_OUTOFMEMORY;
389 ✗ break;
390 }
391
392 1 gate_mem_clear(impl, sizeof(gate_bzip2decoder_impl_t));
393 1 gate_init_bzip2decoder_vtbl();
394 1 impl->vtbl = &gate_bzip2decoder_vtbl;
395 1 gate_atomic_int_init(&impl->ref_counter, 1);
396 1 impl->source_stream = input;
397
398 1 bzresult = BZ2_bzDecompressInit(&impl->decoder, 0, 0);
399
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 1 if (bzresult != BZ_OK)
400 {
401 ✗ gate_mem_dealloc(impl);
402 ✗ ret = GATE_RESULT_FAILED;
403 ✗ break;
404 }
405
406 1 gate_object_retain(impl->source_stream);
407 1 *ptr2streamptr = (gate_stream_t*)impl;
408
409 1 ret = GATE_RESULT_OK;
410 } while (0);
411
412 1 return ret;
413 }
414
415
416 2 void gate_bzip2decoder_release_impl(void* self)
417 {
418 2 gate_bzip2decoder_impl_t* impl = (gate_bzip2decoder_impl_t*)self;
419
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 2 if (gate_atomic_int_dec(&impl->ref_counter) == 0)
420 {
421 1 BZ2_bzDecompressEnd(&impl->decoder);
422 1 gate_object_release(impl->source_stream);
423 1 gate_mem_dealloc(impl);
424 }
425 2 }
426 1 int gate_bzip2decoder_retain_impl(void* self)
427 {
428 1 gate_bzip2decoder_impl_t* impl = (gate_bzip2decoder_impl_t*)self;
429 1 return gate_atomic_int_inc(&impl->ref_counter);
430 }
431
432 11 gate_result_t gate_bzip2decoder_peek_impl(void* self, char* buffer, gate_size_t bufferlength, gate_size_t* returned)
433 {
434 11 gate_bzip2decoder_impl_t* impl = (gate_bzip2decoder_impl_t*)self;
435
436 11 gate_bool_t end_of_stream = false;
437 gate_size_t bytecount;
438 gate_result_t result;
439 gate_size_t diff;
440 int bzresult;
441
442
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 12 while ((impl->decoded_buffer_length == 0) && (!end_of_stream))
443 {
444
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 2 if (impl->decoder.avail_in == 0)
445 {
446 2 result = gate_stream_read(impl->source_stream, impl->source_buffer, sizeof(impl->source_buffer), &bytecount);
447
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 2 if (GATE_FAILED(result))
448 {
449 ✗ return result;
450 }
451
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 2 if (bytecount == 0)
452 {
453 1 break;
454 }
455 1 impl->decoder.next_in = &impl->source_buffer[0];
456 1 impl->decoder.avail_in = (unsigned int)bytecount;
457 }
458
459
460 1 impl->decoder.avail_out = sizeof(impl->decoded_buffer);
461 1 impl->decoder.next_out = &impl->decoded_buffer[0];
462
463 1 bzresult = BZ2_bzDecompress(&impl->decoder);
464
465
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 1 switch (bzresult)
466 {
467 1 case BZ_STREAM_END:
468 {
469 1 end_of_stream = true;
470 1 break;
471 }
472 ✗ case BZ_OK:
473 {
474 /* success -> continue */
475 ✗ break;
476 }
477 ✗ default:
478 {
479 ✗ return GATE_RESULT_FAILED;
480 }
481 }
482
483
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 1 GATE_DEBUG_ASSERT(sizeof(impl->decoded_buffer) >= impl->decoder.avail_out);
484 1 diff = sizeof(impl->decoded_buffer) - impl->decoder.avail_out;
485 1 impl->decoded_buffer_length = diff;
486 1 impl->decoded_buffer_offset = 0;
487 }
488
489
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 11 if (bufferlength < impl->decoded_buffer_length)
490 {
491 9 gate_mem_copy(buffer, &impl->decoded_buffer[impl->decoded_buffer_offset], bufferlength);
492
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 9 if (returned != NULL)
493 {
494 9 *returned = bufferlength;
495 }
496 }
497 else
498 {
499
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 2 if (impl->decoded_buffer_length > 0)
500 {
501 1 gate_mem_copy(buffer, &impl->decoded_buffer[impl->decoded_buffer_offset], impl->decoded_buffer_length);
502 }
503
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 2 if (returned != NULL)
504 {
505 2 *returned = impl->decoded_buffer_length;
506 }
507 }
508 11 return GATE_RESULT_OK;
509 }
510
511 11 gate_result_t gate_bzip2decoder_read_impl(void* self, char* buffer, gate_size_t bufferlength, gate_size_t* returned)
512 {
513 11 gate_bzip2decoder_impl_t* impl = (gate_bzip2decoder_impl_t*)self;
514 11 gate_size_t tmp = 0;
515 11 gate_result_t ret = gate_bzip2decoder_peek_impl(self, buffer, bufferlength, &tmp);
516
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 11 if (returned != NULL)
517 {
518 11 *returned = tmp;
519 }
520
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 11 if (GATE_SUCCEEDED(ret))
521 {
522 11 impl->decoded_buffer_offset += tmp;
523 11 impl->decoded_buffer_length -= tmp;
524 }
525 11 return ret;
526 }
527 1 gate_result_t gate_bzip2decoder_write_impl(void* self, char const* buffer, gate_size_t bufferlength, gate_size_t* written)
528 {
529 (void)self;
530 (void)buffer;
531 (void)bufferlength;
532 (void)written;
533 1 return GATE_RESULT_NOTSUPPORTED;
534 }
535 1 gate_result_t gate_bzip2decoder_flush_impl(void* self)
536 {
537 (void)self;
538 1 return GATE_RESULT_NOTSUPPORTED;
539 }
540
541
542 #endif /* GATE_ENCODE_BZIP2_USE_LIBBZ2 */
543
544 #if defined(GATE_ENCODE_BZIP2_NO_IMPL)
545
546 gate_result_t gate_bzip2_encoder_create(gate_stream_t* output, gate_int16_t compression, gate_stream_t** ptr2streamptr)
547 {
548 (void)output;
549 (void)compression;
550 (void)ptr2streamptr;
551 return GATE_RESULT_NOTIMPLEMENTED;
552 }
553
554 gate_result_t gate_bzip2_decoder_create(gate_stream_t* input, gate_stream_t** ptr2streamptr)
555 {
556 (void)input;
557 (void)ptr2streamptr;
558 return GATE_RESULT_NOTIMPLEMENTED;
559 }
560
561 #endif /* GATE_ENCODE_BZIP2_NO_IMPL */
562
563