GCC Code Coverage Report

Directory: cvmfs/
File: cvmfs/compression/compression.cc
Date: 2026-05-24 02:35:55
Exec Total Coverage
Lines: 409 547 74.8%
Branches: 221 448 49.3%
Line Branch Exec Source
1 /**
2 * This file is part of the CernVM File System.
3 *
4 * This is a wrapper around zlib. It provides
5 * a set of functions to conveniently compress and decompress stuff.
6 * Almost all of the functions return true on success, otherwise false.
7 *
8 * TODO: think about code deduplication
9 */
10
11
12 #include "compression/compression.h"
13
14 #include <alloca.h>
15 #include <stdlib.h>
16 #include <sys/stat.h>
17
18 #include <algorithm>
19 #include <cassert>
20 #include <cstring>
21
22 #include "crypto/hash.h"
23 #include "util/exception.h"
24 #include "util/logging.h"
25 #include "util/platform.h"
26 #include "util/posix.h"
27 #include "util/smalloc.h"
28
29 using namespace std; // NOLINT
30
31
32 135 static bool CopyFile2File(FILE *fsrc, FILE *fdest) {
33 unsigned char buf[1024];
34
1/2
✓ Branch 1 taken 135 times.
✗ Branch 2 not taken.
 135 rewind(fsrc);
35
1/2
✓ Branch 1 taken 135 times.
✗ Branch 2 not taken.
 135 rewind(fdest);
36
37 size_t have;
38 do {
39
1/2
✓ Branch 1 taken 390 times.
✗ Branch 2 not taken.
 390 have = fread(buf, 1, 1024, fsrc);
40
2/4
✓ Branch 1 taken 390 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
✓ Branch 4 taken 390 times.
 390 if (fwrite(buf, 1, have, fdest) != have)
41 ✗ return false;
42
2/2
✓ Branch 0 taken 255 times.
✓ Branch 1 taken 135 times.
 390 } while (have == 1024);
43 135 return true;
44 }
45
46 51 bool CopyPath2File(const std::string &src, FILE *fdest) {
47 51 int retval = -1;
48 platform_stat64 info;
49
50
1/2
✓ Branch 2 taken 51 times.
✗ Branch 3 not taken.
 51 FILE *fsrc = fopen(src.c_str(), "r");
51
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 51 times.
 51 if (!fsrc)
52 ✗ goto file_copy_final;
53
54
2/4
✓ Branch 1 taken 51 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
✓ Branch 4 taken 51 times.
 51 if (!CopyFile2File(fsrc, fdest))
55 ✗ goto file_copy_final;
56 51 retval = platform_fstat(fileno(fsrc), &info);
57 51 retval |= fchmod(fileno(fdest), info.st_mode);
58
59 51 file_copy_final:
60
1/2
✓ Branch 0 taken 51 times.
✗ Branch 1 not taken.
 51 if (fsrc)
61
1/2
✓ Branch 1 taken 51 times.
✗ Branch 2 not taken.
 51 fclose(fsrc);
62 51 return retval == 0;
63 }
64
65
66 84 bool CopyPath2Path(const string &src, const string &dest) {
67 84 FILE *fsrc = NULL;
68 84 FILE *fdest = NULL;
69 84 int retval = -1;
70 platform_stat64 info;
71
72
1/2
✓ Branch 2 taken 84 times.
✗ Branch 3 not taken.
 84 fsrc = fopen(src.c_str(), "r");
73
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 84 times.
 84 if (!fsrc)
74 ✗ goto file_copy_final;
75
76
1/2
✓ Branch 2 taken 84 times.
✗ Branch 3 not taken.
 84 fdest = fopen(dest.c_str(), "w");
77
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 84 times.
 84 if (!fdest)
78 ✗ goto file_copy_final;
79
80
2/4
✓ Branch 1 taken 84 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
✓ Branch 4 taken 84 times.
 84 if (!CopyFile2File(fsrc, fdest))
81 ✗ goto file_copy_final;
82 84 retval = platform_fstat(fileno(fsrc), &info);
83 84 retval |= fchmod(fileno(fdest), info.st_mode);
84
85 84 file_copy_final:
86
1/2
✓ Branch 0 taken 84 times.
✗ Branch 1 not taken.
 84 if (fsrc)
87
1/2
✓ Branch 1 taken 84 times.
✗ Branch 2 not taken.
 84 fclose(fsrc);
88
1/2
✓ Branch 0 taken 84 times.
✗ Branch 1 not taken.
 84 if (fdest)
89
1/2
✓ Branch 1 taken 84 times.
✗ Branch 2 not taken.
 84 fclose(fdest);
90 84 return retval == 0;
91 }
92
93
94 ✗ bool CopyMem2File(const unsigned char *buffer, const unsigned buffer_size,
95 FILE *fdest) {
96 ✗ int written = fwrite(buffer, 1, buffer_size, fdest);
97 ✗ return (written >= 0) && (unsigned(written) == buffer_size);
98 }
99
100
101 1310 bool CopyMem2Path(const unsigned char *buffer, const unsigned buffer_size,
102 const string &path) {
103 1310 int fd = open(path.c_str(), O_WRONLY | O_CREAT | O_TRUNC, kDefaultFileMode);
104
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1310 times.
 1310 if (fd < 0)
105 ✗ return false;
106
107 1310 int written = write(fd, buffer, buffer_size);
108 1310 close(fd);
109
110
2/4
✓ Branch 0 taken 1310 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 1310 times.
✗ Branch 3 not taken.
 1310 return (written >= 0) && (unsigned(written) == buffer_size);
111 }
112
113
114 10 bool CopyPath2Mem(const string &path, unsigned char **buffer,
115 unsigned *buffer_size) {
116 10 const int fd = open(path.c_str(), O_RDONLY);
117
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 10 times.
 10 if (fd < 0)
118 ✗ return false;
119
120 10 *buffer_size = 512;
121 10 *buffer = reinterpret_cast<unsigned char *>(smalloc(*buffer_size));
122 10 unsigned total_bytes = 0;
123 while (true) {
124 20 int num_bytes = read(fd, *buffer + total_bytes, *buffer_size - total_bytes);
125
2/2
✓ Branch 0 taken 10 times.
✓ Branch 1 taken 10 times.
 20 if (num_bytes == 0)
126 10 break;
127
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 10 times.
 10 if (num_bytes < 0) {
128 ✗ close(fd);
129 ✗ free(*buffer);
130 ✗ *buffer_size = 0;
131 ✗ return false;
132 }
133 10 total_bytes += num_bytes;
134
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 10 times.
 10 if (total_bytes >= *buffer_size) {
135 ✗ *buffer_size *= 2;
136 ✗ *buffer = reinterpret_cast<unsigned char *>(
137 ✗ srealloc(*buffer, *buffer_size));
138 }
139 10 }
140
141 10 close(fd);
142 10 *buffer_size = total_bytes;
143 10 return true;
144 }
145
146 namespace zlib {
147
148 const unsigned kBufferSize = 32768;
149
150 /**
151 * Aborts if string doesn't match any of the algorithms.
152 */
153 ✗ Algorithms ParseCompressionAlgorithm(const std::string &algorithm_option) {
154 ✗ if ((algorithm_option == "default") || (algorithm_option == "zlib"))
155 ✗ return kZlibDefault;
156 ✗ if (algorithm_option == "none")
157 ✗ return kNoCompression;
158 ✗ PANIC(kLogStderr, "unknown compression algorithms: %s",
159 algorithm_option.c_str());
160 }
161
162
163 ✗ std::string AlgorithmName(const zlib::Algorithms alg) {
164 ✗ switch (alg) {
165 ✗ case kZlibDefault:
166 ✗ return "zlib";
167 break;
168 ✗ case kNoCompression:
169 ✗ return "none";
170 break;
171 // Purposely did not add a 'default' statement here: this will
172 // cause the compiler to generate a warning if a new algorithm
173 // is added but this function is not updated.
174 }
175 ✗ return "unknown";
176 }
177
178
179 5707 void CompressInit(z_stream *strm) {
180 5707 strm->zalloc = Z_NULL;
181 5707 strm->zfree = Z_NULL;
182 5707 strm->opaque = Z_NULL;
183 5707 strm->next_in = Z_NULL;
184 5707 strm->avail_in = 0;
185 5707 int retval = deflateInit(strm, Z_DEFAULT_COMPRESSION);
186
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 5707 times.
 5707 assert(retval == 0);
187 5707 }
188
189
190 4836 void DecompressInit(z_stream *strm) {
191 4836 strm->zalloc = Z_NULL;
192 4836 strm->zfree = Z_NULL;
193 4836 strm->opaque = Z_NULL;
194 4836 strm->avail_in = 0;
195 4836 strm->next_in = Z_NULL;
196 4836 int retval = inflateInit(strm);
197
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 4836 times.
 4836 assert(retval == 0);
198 4836 }
199
200
201 5707 void CompressFini(z_stream *strm) { (void)deflateEnd(strm); }
202
203
204 4628 void DecompressFini(z_stream *strm) { (void)inflateEnd(strm); }
205
206
207 52 StreamStates CompressZStream2Null(const void *buf,
208 const int64_t size,
209 const bool eof,
210 z_stream *strm,
211 shash::ContextPtr *hash_context) {
212 unsigned char out[kZChunk];
213 int z_ret;
214
215 52 strm->avail_in = size;
216 52 strm->next_in = static_cast<unsigned char *>(const_cast<void *>(buf));
217 // Run deflate() on input until output buffer not full, finish
218 // compression if all of source has been read in
219 do {
220 52 strm->avail_out = kZChunk;
221 52 strm->next_out = out;
222
3/4
✓ Branch 0 taken 39 times.
✓ Branch 1 taken 13 times.
✓ Branch 3 taken 52 times.
✗ Branch 4 not taken.
 52 z_ret = deflate(strm, eof ? Z_FINISH : Z_NO_FLUSH); // no bad return value
223
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 52 times.
 52 if (z_ret == Z_STREAM_ERROR)
224 ✗ return kStreamDataError;
225 52 size_t have = kZChunk - strm->avail_out;
226
1/2
✓ Branch 1 taken 52 times.
✗ Branch 2 not taken.
 52 shash::Update(out, have, *hash_context);
227
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 52 times.
 52 } while (strm->avail_out == 0);
228
229
2/2
✓ Branch 0 taken 39 times.
✓ Branch 1 taken 13 times.
 52 return (z_ret == Z_STREAM_END ? kStreamEnd : kStreamContinue);
230 }
231
232
233 3322 StreamStates DecompressZStream2Sink(const void *buf,
234 const int64_t size,
235 z_stream *strm,
236 cvmfs::Sink *sink) {
237 unsigned char out[kZChunk];
238 int z_ret;
239 3322 int64_t pos = 0;
240
241 do {
242 3322 strm->avail_in = (kZChunk > (size - pos)) ? size - pos : kZChunk;
243 3322 strm->next_in = ((unsigned char *)buf) + pos;
244
245 // Run inflate() on input until output buffer not full
246 do {
247 5667 strm->avail_out = kZChunk;
248 5667 strm->next_out = out;
249
1/2
✓ Branch 1 taken 5667 times.
✗ Branch 2 not taken.
 5667 z_ret = inflate(strm, Z_NO_FLUSH);
250
1/4
✗ Branch 0 not taken.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 5667 times.
 5667 switch (z_ret) {
251 ✗ case Z_NEED_DICT:
252 ✗ z_ret = Z_DATA_ERROR; // and fall through
253 ✗ case Z_STREAM_ERROR:
254 case Z_DATA_ERROR:
255 ✗ return kStreamDataError;
256 ✗ case Z_MEM_ERROR:
257 ✗ return kStreamIOError;
258 }
259 5667 size_t have = kZChunk - strm->avail_out;
260
1/2
✓ Branch 1 taken 5667 times.
✗ Branch 2 not taken.
 5667 int64_t written = sink->Write(out, have);
261
2/4
✓ Branch 0 taken 5667 times.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 5667 times.
 5667 if ((written < 0) || (static_cast<uint64_t>(written) != have))
262 ✗ return kStreamIOError;
263
2/2
✓ Branch 0 taken 2345 times.
✓ Branch 1 taken 3322 times.
 5667 } while (strm->avail_out == 0);
264
265 3322 pos += kZChunk;
266
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3322 times.
 3322 } while (pos < size);
267
268
2/2
✓ Branch 0 taken 3243 times.
✓ Branch 1 taken 79 times.
 3322 return (z_ret == Z_STREAM_END ? kStreamEnd : kStreamContinue);
269 }
270
271
272 136 StreamStates DecompressZStream2File(const void *buf,
273 const int64_t size,
274 z_stream *strm,
275 FILE *f) {
276 unsigned char out[kZChunk];
277 int z_ret;
278 136 int64_t pos = 0;
279
280 do {
281 136 strm->avail_in = (kZChunk > (size - pos)) ? size - pos : kZChunk;
282 136 strm->next_in = ((unsigned char *)buf) + pos;
283
284 // Run inflate() on input until output buffer not full
285 do {
286 187 strm->avail_out = kZChunk;
287 187 strm->next_out = out;
288
1/2
✓ Branch 1 taken 187 times.
✗ Branch 2 not taken.
 187 z_ret = inflate(strm, Z_NO_FLUSH);
289
1/4
✗ Branch 0 not taken.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 187 times.
 187 switch (z_ret) {
290 ✗ case Z_NEED_DICT:
291 ✗ z_ret = Z_DATA_ERROR; // and fall through
292 ✗ case Z_STREAM_ERROR:
293 case Z_DATA_ERROR:
294 ✗ return kStreamDataError;
295 ✗ case Z_MEM_ERROR:
296 ✗ return kStreamIOError;
297 }
298 187 size_t have = kZChunk - strm->avail_out;
299
4/9
✓ Branch 1 taken 187 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 187 times.
✗ Branch 4 not taken.
✗ Branch 5 not taken.
✗ Branch 6 not taken.
✓ Branch 7 taken 187 times.
✗ Branch 8 not taken.
✓ Branch 9 taken 187 times.
 187 if (fwrite(out, 1, have, f) != have || ferror(f)) {
300 ✗ LogCvmfs(kLogCompress, kLogDebug,
301 "Inflate to file failed with %s "
302 "(errno=%d)",
303 ✗ strerror(errno), errno);
304 ✗ return kStreamIOError;
305 }
306
2/2
✓ Branch 0 taken 51 times.
✓ Branch 1 taken 136 times.
 187 } while (strm->avail_out == 0);
307
308 136 pos += kZChunk;
309
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 136 times.
 136 } while (pos < size);
310
311
1/2
✓ Branch 0 taken 136 times.
✗ Branch 1 not taken.
 136 return (z_ret == Z_STREAM_END ? kStreamEnd : kStreamContinue);
312 }
313
314
315 1418 bool CompressPath2Path(const string &src, const string &dest) {
316 1418 FILE *fsrc = fopen(src.c_str(), "r");
317
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1418 times.
 1418 if (!fsrc) {
318 ✗ LogCvmfs(kLogCompress, kLogDebug, "open %s as compression source failed",
319 src.c_str());
320 ✗ return false;
321 }
322
323 1418 FILE *fdest = fopen(dest.c_str(), "w");
324
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1418 times.
 1418 if (!fdest) {
325 ✗ LogCvmfs(kLogCompress, kLogDebug,
326 "open %s as compression destination "
327 "failed with errno=%d",
328 ✗ dest.c_str(), errno);
329 ✗ fclose(fsrc);
330 ✗ return false;
331 }
332
333 1418 LogCvmfs(kLogCompress, kLogDebug, "opened %s and %s for compression",
334 src.c_str(), dest.c_str());
335 1418 const bool result = CompressFile2File(fsrc, fdest);
336
337 1418 fclose(fsrc);
338 1418 fclose(fdest);
339 1418 return result;
340 }
341
342
343 2069 bool CompressPath2Path(const string &src, const string &dest,
344 shash::Any *compressed_hash) {
345
1/2
✓ Branch 2 taken 2069 times.
✗ Branch 3 not taken.
 2069 FILE *fsrc = fopen(src.c_str(), "r");
346
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 2069 times.
 2069 if (!fsrc) {
347 ✗ LogCvmfs(kLogCompress, kLogDebug, "open %s as compression source failed",
348 src.c_str());
349 ✗ return false;
350 }
351
352
1/2
✓ Branch 2 taken 2069 times.
✗ Branch 3 not taken.
 2069 FILE *fdest = fopen(dest.c_str(), "w");
353
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 2069 times.
 2069 if (!fdest) {
354 ✗ LogCvmfs(kLogCompress, kLogDebug,
355 "open %s as compression destination "
356 "failed with errno=%d",
357 ✗ dest.c_str(), errno);
358 ✗ fclose(fsrc);
359 ✗ return false;
360 }
361
362
1/2
✓ Branch 3 taken 2069 times.
✗ Branch 4 not taken.
 2069 LogCvmfs(kLogCompress, kLogDebug, "opened %s and %s for compression",
363 src.c_str(), dest.c_str());
364 2069 bool result = false;
365
2/4
✓ Branch 1 taken 2069 times.
✗ Branch 2 not taken.
✗ Branch 3 not taken.
✓ Branch 4 taken 2069 times.
 2069 if (!CompressFile2File(fsrc, fdest, compressed_hash))
366 ✗ goto compress_path2path_final;
367 platform_stat64 info;
368
1/2
✗ Branch 2 not taken.
✓ Branch 3 taken 2069 times.
 2069 if (platform_fstat(fileno(fsrc), &info) != 0)
369 ✗ goto compress_path2path_final;
370 // TODO(jakob): open in the right mode from the beginning
371
1/2
✗ Branch 2 not taken.
✓ Branch 3 taken 2069 times.
 2069 if (fchmod(fileno(fdest), info.st_mode) != 0)
372 ✗ goto compress_path2path_final;
373
374 2069 result = true;
375
376 2069 compress_path2path_final:
377
1/2
✓ Branch 1 taken 2069 times.
✗ Branch 2 not taken.
 2069 fclose(fsrc);
378
1/2
✓ Branch 1 taken 2069 times.
✗ Branch 2 not taken.
 2069 fclose(fdest);
379 2069 return result;
380 }
381
382
383 ✗ bool DecompressPath2Path(const string &src, const string &dest) {
384 ✗ FILE *fsrc = NULL;
385 ✗ FILE *fdest = NULL;
386 ✗ int result = false;
387
388 ✗ fsrc = fopen(src.c_str(), "r");
389 ✗ if (!fsrc)
390 ✗ goto decompress_path2path_final;
391
392 ✗ fdest = fopen(dest.c_str(), "w");
393 ✗ if (!fdest)
394 ✗ goto decompress_path2path_final;
395
396 ✗ result = DecompressFile2File(fsrc, fdest);
397
398 ✗ decompress_path2path_final:
399 ✗ if (fsrc)
400 ✗ fclose(fsrc);
401 ✗ if (fdest)
402 ✗ fclose(fdest);
403 ✗ return result;
404 }
405
406
407 1418 bool CompressFile2Null(FILE *fsrc, shash::Any *compressed_hash) {
408 1418 int z_ret = 0;
409 1418 int flush = 0;
410 1418 bool result = -1;
411 unsigned have;
412 z_stream strm;
413 unsigned char in[kZChunk];
414 unsigned char out[kZChunk];
415
1/2
✓ Branch 1 taken 1418 times.
✗ Branch 2 not taken.
 1418 shash::ContextPtr hash_context(compressed_hash->algorithm);
416
417
1/2
✓ Branch 1 taken 1418 times.
✗ Branch 2 not taken.
 1418 CompressInit(&strm);
418 1418 hash_context.buffer = alloca(hash_context.size);
419
1/2
✓ Branch 1 taken 1418 times.
✗ Branch 2 not taken.
 1418 shash::Init(hash_context);
420
421 // Compress until end of file
422 do {
423
1/2
✓ Branch 1 taken 1418 times.
✗ Branch 2 not taken.
 1418 strm.avail_in = fread(in, 1, kZChunk, fsrc);
424
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 1418 times.
 1418 if (ferror(fsrc))
425 ✗ goto compress_file2null_final;
426
427
1/2
✓ Branch 1 taken 1418 times.
✗ Branch 2 not taken.
 1418 flush = feof(fsrc) ? Z_FINISH : Z_NO_FLUSH;
428 1418 strm.next_in = in;
429
430 // Run deflate() on input until output buffer not full, finish
431 // compression if all of source has been read in
432 do {
433 1418 strm.avail_out = kZChunk;
434 1418 strm.next_out = out;
435
1/2
✓ Branch 1 taken 1418 times.
✗ Branch 2 not taken.
 1418 z_ret = deflate(&strm, flush); // no bad return value
436
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1418 times.
 1418 if (z_ret == Z_STREAM_ERROR)
437 ✗ goto compress_file2null_final; // state not clobbered
438 1418 have = kZChunk - strm.avail_out;
439
1/2
✓ Branch 1 taken 1418 times.
✗ Branch 2 not taken.
 1418 shash::Update(out, have, hash_context);
440
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1418 times.
 1418 } while (strm.avail_out == 0);
441
442 // Done when last data in file processed
443
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1418 times.
 1418 } while (flush != Z_FINISH);
444
445 // stream will be complete
446
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1418 times.
 1418 if (z_ret != Z_STREAM_END)
447 ✗ goto compress_file2null_final;
448
449
1/2
✓ Branch 1 taken 1418 times.
✗ Branch 2 not taken.
 1418 shash::Final(hash_context, compressed_hash);
450 1418 result = true;
451
452 // Clean up and return
453 1418 compress_file2null_final:
454
1/2
✓ Branch 1 taken 1418 times.
✗ Branch 2 not taken.
 1418 CompressFini(&strm);
455
1/2
✓ Branch 1 taken 1418 times.
✗ Branch 2 not taken.
 1418 LogCvmfs(kLogCompress, kLogDebug, "file compression finished with result %d",
456 result);
457 1418 return result;
458 }
459
460
461 20 bool CompressFd2Null(int fd_src, shash::Any *compressed_hash,
462 uint64_t *processed_bytes) {
463 20 int z_ret = 0;
464 20 int flush = 0;
465 20 bool result = false;
466 unsigned have;
467 z_stream strm;
468 unsigned char in[kZChunk];
469 unsigned char out[kZChunk];
470 20 off_t cksum_bytes = 0;
471
1/2
✓ Branch 1 taken 20 times.
✗ Branch 2 not taken.
 20 shash::ContextPtr hash_context(compressed_hash->algorithm);
472
473
1/2
✓ Branch 1 taken 20 times.
✗ Branch 2 not taken.
 20 CompressInit(&strm);
474 20 hash_context.buffer = alloca(hash_context.size);
475
1/2
✓ Branch 1 taken 20 times.
✗ Branch 2 not taken.
 20 shash::Init(hash_context);
476
477 // Compress until end of file
478 do {
479
1/2
✓ Branch 1 taken 20 times.
✗ Branch 2 not taken.
 20 ssize_t bytes_read = read(fd_src, in, kZChunk);
480
2/2
✓ Branch 0 taken 10 times.
✓ Branch 1 taken 10 times.
 20 if (bytes_read < 0) {
481
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 10 times.
 10 if (errno == EINTR) {
482 ✗ continue;
483 }
484 10 goto compress_fd2null_final;
485 }
486 10 cksum_bytes += bytes_read;
487 10 strm.avail_in = bytes_read;
488
489
1/2
✓ Branch 0 taken 10 times.
✗ Branch 1 not taken.
 10 flush = (static_cast<size_t>(bytes_read) < kZChunk) ? Z_FINISH : Z_NO_FLUSH;
490 10 strm.next_in = in;
491
492 // Run deflate() on input until output buffer not full, finish
493 // compression if all of source has been read in
494 do {
495 10 strm.avail_out = kZChunk;
496 10 strm.next_out = out;
497
1/2
✓ Branch 1 taken 10 times.
✗ Branch 2 not taken.
 10 z_ret = deflate(&strm, flush); // no bad return value
498
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 10 times.
 10 if (z_ret == Z_STREAM_ERROR)
499 ✗ goto compress_fd2null_final; // state not clobbered
500 10 have = kZChunk - strm.avail_out;
501
1/2
✓ Branch 1 taken 10 times.
✗ Branch 2 not taken.
 10 shash::Update(out, have, hash_context);
502
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 10 times.
 10 } while (strm.avail_out == 0);
503
504 // Done when last data in file processed
505
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 10 times.
 10 } while (flush != Z_FINISH);
506
507 // stream will be complete
508
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 10 times.
 10 if (z_ret != Z_STREAM_END)
509 ✗ goto compress_fd2null_final;
510
511
1/2
✓ Branch 1 taken 10 times.
✗ Branch 2 not taken.
 10 shash::Final(hash_context, compressed_hash);
512
1/2
✓ Branch 0 taken 10 times.
✗ Branch 1 not taken.
 10 if (processed_bytes) {
513 10 *processed_bytes = cksum_bytes;
514 }
515 10 result = true;
516
517 // Clean up and return
518 20 compress_fd2null_final:
519
1/2
✓ Branch 1 taken 20 times.
✗ Branch 2 not taken.
 20 CompressFini(&strm);
520
1/2
✓ Branch 1 taken 20 times.
✗ Branch 2 not taken.
 20 LogCvmfs(kLogCompress, kLogDebug, "file compression finished with result %d",
521 result);
522 20 return result;
523 }
524
525
526 1418 bool CompressPath2Null(const string &src, shash::Any *compressed_hash) {
527 1418 FILE *fsrc = fopen(src.c_str(), "r");
528
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1418 times.
 1418 if (fsrc == NULL)
529 ✗ return false;
530 1418 bool retval = CompressFile2Null(fsrc, compressed_hash);
531 1418 fclose(fsrc);
532 1418 return retval;
533 }
534
535
536 1418 bool CompressFile2File(FILE *fsrc, FILE *fdest) {
537 1418 int z_ret = 0;
538 1418 int flush = 0;
539 1418 bool result = false;
540 unsigned have;
541 z_stream strm;
542 unsigned char in[kZChunk];
543 unsigned char out[kZChunk];
544
545
1/2
✓ Branch 1 taken 1418 times.
✗ Branch 2 not taken.
 1418 CompressInit(&strm);
546
547 // Compress until end of file
548 do {
549
1/2
✓ Branch 1 taken 1418 times.
✗ Branch 2 not taken.
 1418 strm.avail_in = fread(in, 1, kZChunk, fsrc);
550
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 1418 times.
 1418 if (ferror(fsrc))
551 ✗ goto compress_file2file_final;
552
553
1/2
✓ Branch 1 taken 1418 times.
✗ Branch 2 not taken.
 1418 flush = feof(fsrc) ? Z_FINISH : Z_NO_FLUSH;
554 1418 strm.next_in = in;
555
556 // Run deflate() on input until output buffer not full, finish
557 // compression if all of source has been read in
558 do {
559 1418 strm.avail_out = kZChunk;
560 1418 strm.next_out = out;
561
1/2
✓ Branch 1 taken 1418 times.
✗ Branch 2 not taken.
 1418 z_ret = deflate(&strm, flush); // no bad return value
562
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1418 times.
 1418 if (z_ret == Z_STREAM_ERROR)
563 ✗ goto compress_file2file_final; // state not clobbered
564 1418 have = kZChunk - strm.avail_out;
565
4/9
✓ Branch 1 taken 1418 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 1418 times.
✗ Branch 4 not taken.
✗ Branch 5 not taken.
✗ Branch 6 not taken.
✓ Branch 7 taken 1418 times.
✗ Branch 8 not taken.
✓ Branch 9 taken 1418 times.
 1418 if (fwrite(out, 1, have, fdest) != have || ferror(fdest))
566 ✗ goto compress_file2file_final;
567
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1418 times.
 1418 } while (strm.avail_out == 0);
568
569 // Done when last data in file processed
570
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1418 times.
 1418 } while (flush != Z_FINISH);
571
572 // stream will be complete
573
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 1418 times.
 1418 if (z_ret != Z_STREAM_END)
574 ✗ goto compress_file2file_final;
575
576 1418 result = true;
577
578 // Clean up and return
579 1418 compress_file2file_final:
580
1/2
✓ Branch 1 taken 1418 times.
✗ Branch 2 not taken.
 1418 CompressFini(&strm);
581
1/2
✓ Branch 1 taken 1418 times.
✗ Branch 2 not taken.
 1418 LogCvmfs(kLogCompress, kLogDebug, "file compression finished with result %d",
582 result);
583 1418 return result;
584 }
585
586 ✗ bool CompressPath2File(const string &src, FILE *fdest,
587 shash::Any *compressed_hash) {
588 ✗ FILE *fsrc = fopen(src.c_str(), "r");
589 ✗ if (!fsrc)
590 ✗ return false;
591
592 ✗ bool retval = CompressFile2File(fsrc, fdest, compressed_hash);
593 ✗ fclose(fsrc);
594 ✗ return retval;
595 }
596
597
598 2069 bool CompressFile2File(FILE *fsrc, FILE *fdest, shash::Any *compressed_hash) {
599 2069 int z_ret = 0;
600 2069 int flush = 0;
601 2069 bool result = false;
602 unsigned have;
603 z_stream strm;
604 unsigned char in[kZChunk];
605 unsigned char out[kZChunk];
606
1/2
✓ Branch 1 taken 2069 times.
✗ Branch 2 not taken.
 2069 shash::ContextPtr hash_context(compressed_hash->algorithm);
607
608
1/2
✓ Branch 1 taken 2069 times.
✗ Branch 2 not taken.
 2069 CompressInit(&strm);
609 2069 hash_context.buffer = alloca(hash_context.size);
610
1/2
✓ Branch 1 taken 2069 times.
✗ Branch 2 not taken.
 2069 shash::Init(hash_context);
611
612 // Compress until end of file
613 do {
614
1/2
✓ Branch 1 taken 3118 times.
✗ Branch 2 not taken.
 3118 strm.avail_in = fread(in, 1, kZChunk, fsrc);
615
1/2
✗ Branch 1 not taken.
✓ Branch 2 taken 3118 times.
 3118 if (ferror(fsrc))
616 ✗ goto compress_file2file_hashed_final;
617
618
2/2
✓ Branch 1 taken 2069 times.
✓ Branch 2 taken 1049 times.
 3118 flush = feof(fsrc) ? Z_FINISH : Z_NO_FLUSH;
619 3118 strm.next_in = in;
620
621 // Run deflate() on input until output buffer not full, finish
622 // compression if all of source has been read in
623 do {
624 3118 strm.avail_out = kZChunk;
625 3118 strm.next_out = out;
626
1/2
✓ Branch 1 taken 3118 times.
✗ Branch 2 not taken.
 3118 z_ret = deflate(&strm, flush); // no bad return value
627
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3118 times.
 3118 if (z_ret == Z_STREAM_ERROR)
628 ✗ goto compress_file2file_hashed_final; // state not clobbered
629 3118 have = kZChunk - strm.avail_out;
630
4/9
✓ Branch 1 taken 3118 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 3118 times.
✗ Branch 4 not taken.
✗ Branch 5 not taken.
✗ Branch 6 not taken.
✓ Branch 7 taken 3118 times.
✗ Branch 8 not taken.
✓ Branch 9 taken 3118 times.
 3118 if (fwrite(out, 1, have, fdest) != have || ferror(fdest))
631 ✗ goto compress_file2file_hashed_final;
632
1/2
✓ Branch 1 taken 3118 times.
✗ Branch 2 not taken.
 3118 shash::Update(out, have, hash_context);
633
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 3118 times.
 3118 } while (strm.avail_out == 0);
634
635 // Done when last data in file processed
636
2/2
✓ Branch 0 taken 1049 times.
✓ Branch 1 taken 2069 times.
 3118 } while (flush != Z_FINISH);
637
638 // Stream will be complete
639
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 2069 times.
 2069 if (z_ret != Z_STREAM_END)
640 ✗ goto compress_file2file_hashed_final;
641
642
1/2
✓ Branch 1 taken 2069 times.
✗ Branch 2 not taken.
 2069 shash::Final(hash_context, compressed_hash);
643 2069 result = true;
644
645 // Clean up and return
646 2069 compress_file2file_hashed_final:
647
1/2
✓ Branch 1 taken 2069 times.
✗ Branch 2 not taken.
 2069 CompressFini(&strm);
648
1/2
✓ Branch 1 taken 2069 times.
✗ Branch 2 not taken.
 2069 LogCvmfs(kLogCompress, kLogDebug, "file compression finished with result %d",
649 result);
650 2069 return result;
651 }
652
653
654 170 bool DecompressFile2File(FILE *fsrc, FILE *fdest) {
655 170 bool result = false;
656 170 StreamStates stream_state = kStreamIOError;
657 z_stream strm;
658 size_t have;
659 unsigned char buf[kBufferSize];
660
661
1/2
✓ Branch 1 taken 170 times.
✗ Branch 2 not taken.
 170 DecompressInit(&strm);
662
663
3/4
✓ Branch 1 taken 306 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 136 times.
✓ Branch 4 taken 170 times.
 306 while ((have = fread(buf, 1, kBufferSize, fsrc)) > 0) {
664
1/2
✓ Branch 1 taken 136 times.
✗ Branch 2 not taken.
 136 stream_state = DecompressZStream2File(buf, have, &strm, fdest);
665
2/4
✓ Branch 0 taken 136 times.
✗ Branch 1 not taken.
✗ Branch 2 not taken.
✓ Branch 3 taken 136 times.
 136 if ((stream_state == kStreamDataError) || (stream_state == kStreamIOError))
666 ✗ goto decompress_file2file_final;
667 }
668
1/2
✓ Branch 2 taken 170 times.
✗ Branch 3 not taken.
 170 LogCvmfs(kLogCompress, kLogDebug, "end of decompression, state=%d, error=%d",
669 stream_state, ferror(fsrc));
670
5/6
✓ Branch 0 taken 136 times.
✓ Branch 1 taken 34 times.
✗ Branch 3 not taken.
✓ Branch 4 taken 136 times.
✓ Branch 5 taken 34 times.
✓ Branch 6 taken 136 times.
 170 if ((stream_state != kStreamEnd) || ferror(fsrc))
671 34 goto decompress_file2file_final;
672
673 136 result = true;
674
675 170 decompress_file2file_final:
676
1/2
✓ Branch 1 taken 170 times.
✗ Branch 2 not taken.
 170 DecompressFini(&strm);
677 170 return result;
678 }
679
680
681 170 bool DecompressPath2File(const string &src, FILE *fdest) {
682 170 FILE *fsrc = fopen(src.c_str(), "r");
683
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 170 times.
 170 if (!fsrc)
684 ✗ return false;
685
686 170 bool retval = DecompressFile2File(fsrc, fdest);
687 170 fclose(fsrc);
688 170 return retval;
689 }
690
691
692 13 bool CompressMem2File(const unsigned char *buf, const size_t size, FILE *fdest,
693 shash::Any *compressed_hash) {
694 13 int z_ret = 0;
695 13 int flush = 0;
696 13 bool result = false;
697 unsigned have;
698 z_stream strm;
699 13 size_t offset = 0;
700 13 size_t used = 0;
701 unsigned char out[kZChunk];
702
1/2
✓ Branch 1 taken 13 times.
✗ Branch 2 not taken.
 13 shash::ContextPtr hash_context(compressed_hash->algorithm);
703
704
1/2
✓ Branch 1 taken 13 times.
✗ Branch 2 not taken.
 13 CompressInit(&strm);
705 13 hash_context.buffer = alloca(hash_context.size);
706
1/2
✓ Branch 1 taken 13 times.
✗ Branch 2 not taken.
 13 shash::Init(hash_context);
707
708 // Compress the given memory buffer
709 do {
710 65 used = min(static_cast<size_t>(kZChunk), size - offset);
711 65 strm.avail_in = used;
712
713
2/2
✓ Branch 0 taken 13 times.
✓ Branch 1 taken 52 times.
 65 flush = (strm.avail_in < kZChunk) ? Z_FINISH : Z_NO_FLUSH;
714 65 strm.next_in = const_cast<unsigned char *>(buf + offset);
715
716 // Run deflate() on input until output buffer not full, finish
717 // compression if all of source has been read in
718 do {
719 104 strm.avail_out = kZChunk;
720 104 strm.next_out = out;
721
1/2
✓ Branch 1 taken 104 times.
✗ Branch 2 not taken.
 104 z_ret = deflate(&strm, flush); // no bad return value
722
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 104 times.
 104 if (z_ret == Z_STREAM_ERROR)
723 ✗ goto compress_file2file_hashed_final; // state not clobbered
724 104 have = kZChunk - strm.avail_out;
725
4/9
✓ Branch 1 taken 104 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 104 times.
✗ Branch 4 not taken.
✗ Branch 5 not taken.
✗ Branch 6 not taken.
✓ Branch 7 taken 104 times.
✗ Branch 8 not taken.
✓ Branch 9 taken 104 times.
 104 if (fwrite(out, 1, have, fdest) != have || ferror(fdest))
726 ✗ goto compress_file2file_hashed_final;
727
1/2
✓ Branch 1 taken 104 times.
✗ Branch 2 not taken.
 104 shash::Update(out, have, hash_context);
728
2/2
✓ Branch 0 taken 39 times.
✓ Branch 1 taken 65 times.
 104 } while (strm.avail_out == 0);
729
730 65 offset += used;
731
732 // Done when last data in file processed
733
2/2
✓ Branch 0 taken 52 times.
✓ Branch 1 taken 13 times.
 65 } while (flush != Z_FINISH);
734
735 // Stream will be complete
736
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 13 times.
 13 if (z_ret != Z_STREAM_END)
737 ✗ goto compress_file2file_hashed_final;
738
739
1/2
✓ Branch 1 taken 13 times.
✗ Branch 2 not taken.
 13 shash::Final(hash_context, compressed_hash);
740 13 result = true;
741
742 // Clean up and return
743 13 compress_file2file_hashed_final:
744
1/2
✓ Branch 1 taken 13 times.
✗ Branch 2 not taken.
 13 CompressFini(&strm);
745
1/2
✓ Branch 1 taken 13 times.
✗ Branch 2 not taken.
 13 LogCvmfs(kLogCompress, kLogDebug, "file compression finished with result %d",
746 result);
747 13 return result;
748 }
749
750
751 /**
752 * User of this function has to free out_buf.
753 */
754 717 bool CompressMem2Mem(const void *buf, const int64_t size, void **out_buf,
755 uint64_t *out_size) {
756 unsigned char out[kZChunk];
757 int z_ret;
758 int flush;
759 z_stream strm;
760 717 int64_t pos = 0;
761 717 uint64_t alloc_size = kZChunk;
762
763
1/2
✓ Branch 1 taken 717 times.
✗ Branch 2 not taken.
 717 CompressInit(&strm);
764 717 *out_buf = smalloc(alloc_size);
765 717 *out_size = 0;
766
767 do {
768 14016 strm.avail_in = (kZChunk > (size - pos)) ? size - pos : kZChunk;
769
2/2
✓ Branch 0 taken 717 times.
✓ Branch 1 taken 13299 times.
 14016 flush = (pos + kZChunk) >= size ? Z_FINISH : Z_NO_FLUSH;
770 14016 strm.next_in = ((unsigned char *)buf) + pos;
771
772 // Run deflate() on input until output buffer not full
773 do {
774 14224 strm.avail_out = kZChunk;
775 14224 strm.next_out = out;
776
1/2
✓ Branch 1 taken 14224 times.
✗ Branch 2 not taken.
 14224 z_ret = deflate(&strm, flush);
777
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 14224 times.
 14224 if (z_ret == Z_STREAM_ERROR) {
778 ✗ CompressFini(&strm);
779 ✗ free(*out_buf);
780 ✗ *out_buf = NULL;
781 ✗ *out_size = 0;
782 ✗ return false;
783 }
784 14224 size_t have = kZChunk - strm.avail_out;
785
2/2
✓ Branch 0 taken 65 times.
✓ Branch 1 taken 14159 times.
 14224 if (*out_size + have > alloc_size) {
786 65 alloc_size *= 2;
787 65 *out_buf = srealloc(*out_buf, alloc_size);
788 }
789 14224 memcpy(static_cast<unsigned char *>(*out_buf) + *out_size, out, have);
790 14224 *out_size += have;
791
2/2
✓ Branch 0 taken 208 times.
✓ Branch 1 taken 14016 times.
 14224 } while (strm.avail_out == 0);
792
793 14016 pos += kZChunk;
794
2/2
✓ Branch 0 taken 13299 times.
✓ Branch 1 taken 717 times.
 14016 } while (flush != Z_FINISH);
795
796
1/2
✓ Branch 1 taken 717 times.
✗ Branch 2 not taken.
 717 CompressFini(&strm);
797
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 717 times.
 717 if (z_ret != Z_STREAM_END) {
798 ✗ free(*out_buf);
799 ✗ *out_buf = NULL;
800 ✗ *out_size = 0;
801 ✗ return false;
802 } else {
803 717 return true;
804 }
805 }
806
807
808 /**
809 * User of this function has to free out_buf.
810 */
811 990 bool DecompressMem2Mem(const void *buf, const int64_t size, void **out_buf,
812 uint64_t *out_size) {
813 unsigned char out[kZChunk];
814 int z_ret;
815 z_stream strm;
816 990 int64_t pos = 0;
817 990 uint64_t alloc_size = kZChunk;
818
819
1/2
✓ Branch 1 taken 990 times.
✗ Branch 2 not taken.
 990 DecompressInit(&strm);
820 990 *out_buf = smalloc(alloc_size);
821 990 *out_size = 0;
822
823 do {
824 1021 strm.avail_in = (kZChunk > (size - pos)) ? size - pos : kZChunk;
825 1021 strm.next_in = ((unsigned char *)buf) + pos;
826
827 // Run inflate() on input until output buffer not full
828 do {
829 40670 strm.avail_out = kZChunk;
830 40670 strm.next_out = out;
831
1/2
✓ Branch 1 taken 40670 times.
✗ Branch 2 not taken.
 40670 z_ret = inflate(&strm, Z_NO_FLUSH);
832
1/3
✗ Branch 0 not taken.
✗ Branch 1 not taken.
✓ Branch 2 taken 40670 times.
 40670 switch (z_ret) {
833 ✗ case Z_NEED_DICT:
834 ✗ z_ret = Z_DATA_ERROR; // and fall through
835 ✗ case Z_STREAM_ERROR:
836 case Z_DATA_ERROR:
837 case Z_MEM_ERROR:
838 ✗ DecompressFini(&strm);
839 ✗ free(*out_buf);
840 ✗ *out_buf = NULL;
841 ✗ *out_size = 0;
842 ✗ return false;
843 }
844 40670 size_t have = kZChunk - strm.avail_out;
845
2/2
✓ Branch 0 taken 341 times.
✓ Branch 1 taken 40329 times.
 40670 if (*out_size + have > alloc_size) {
846 341 alloc_size *= 2;
847 341 *out_buf = srealloc(*out_buf, alloc_size);
848 }
849 40670 memcpy(static_cast<unsigned char *>(*out_buf) + *out_size, out, have);
850 40670 *out_size += have;
851
2/2
✓ Branch 0 taken 39649 times.
✓ Branch 1 taken 1021 times.
 40670 } while (strm.avail_out == 0);
852
853 1021 pos += kZChunk;
854
2/2
✓ Branch 0 taken 31 times.
✓ Branch 1 taken 990 times.
 1021 } while (pos < size);
855
856
1/2
✓ Branch 1 taken 990 times.
✗ Branch 2 not taken.
 990 DecompressFini(&strm);
857
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 990 times.
 990 if (z_ret != Z_STREAM_END) {
858 ✗ free(*out_buf);
859 ✗ *out_buf = NULL;
860 ✗ *out_size = 0;
861 ✗ return false;
862 }
863
864 990 return true;
865 }
866
867
868 //------------------------------------------------------------------------------
869
870
871 49 void Compressor::RegisterPlugins() {
872 49 RegisterPlugin<ZlibCompressor>();
873 49 RegisterPlugin<EchoCompressor>();
874 49 }
875
876
877 //------------------------------------------------------------------------------
878
879
880 2496458 bool ZlibCompressor::WillHandle(const zlib::Algorithms &alg) {
881 2496458 return alg == kZlibDefault;
882 }
883
884
885 2497283 ZlibCompressor::ZlibCompressor(const Algorithms &alg) : Compressor(alg) {
886 2496613 stream_.zalloc = Z_NULL;
887 2496613 stream_.zfree = Z_NULL;
888 2496613 stream_.opaque = Z_NULL;
889 2496613 stream_.next_in = Z_NULL;
890 2496613 stream_.avail_in = 0;
891
1/2
✓ Branch 1 taken 2505733 times.
✗ Branch 2 not taken.
 2496613 const int zlib_retval = deflateInit(&stream_, Z_DEFAULT_COMPRESSION);
892
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 2505733 times.
 2505733 assert(zlib_retval == 0);
893 2505733 }
894
895
896 ✗ Compressor *ZlibCompressor::Clone() {
897 ✗ ZlibCompressor *other = new ZlibCompressor(zlib::kZlibDefault);
898 ✗ assert(stream_.avail_in == 0);
899 // Delete the other stream
900 ✗ int retcode = deflateEnd(&other->stream_);
901 ✗ assert(retcode == Z_OK);
902 ✗ retcode = deflateCopy(const_cast<z_streamp>(&other->stream_), &stream_);
903 ✗ assert(retcode == Z_OK);
904 ✗ return other;
905 }
906
907 6494431 bool ZlibCompressor::Deflate(const bool flush, unsigned char **inbuf,
908 size_t *inbufsize, unsigned char **outbuf,
909 size_t *outbufsize) {
910 // Adding compression
911 6494431 stream_.avail_in = *inbufsize;
912 6494431 stream_.next_in = *inbuf;
913
2/2
✓ Branch 0 taken 2512687 times.
✓ Branch 1 taken 3981744 times.
 6494431 const int flush_int = (flush) ? Z_FINISH : Z_NO_FLUSH;
914 6494431 int retcode = 0;
915
916 // TODO(jblomer) Figure out what exactly behaves differently with zlib 1.2.10
917 // if ((*inbufsize == 0) && !flush)
918 // return true;
919
920 6494431 stream_.avail_out = *outbufsize;
921 6494431 stream_.next_out = *outbuf;
922
923 // Deflate in zlib!
924 6494431 retcode = deflate(&stream_, flush_int);
925
3/4
✓ Branch 0 taken 2505353 times.
✓ Branch 1 taken 4009238 times.
✗ Branch 2 not taken.
✓ Branch 3 taken 2505353 times.
 6514591 assert(retcode == Z_OK || retcode == Z_STREAM_END);
926
927 6514591 *outbufsize -= stream_.avail_out;
928 6514591 *inbuf = stream_.next_in;
929 6514591 *inbufsize = stream_.avail_in;
930
931
3/4
✓ Branch 0 taken 3998784 times.
✗ Branch 1 not taken.
✓ Branch 2 taken 675751 times.
✓ Branch 3 taken 3323033 times.
 3998784 return (flush_int == Z_NO_FLUSH && retcode == Z_OK && stream_.avail_in == 0)
932
6/6
✓ Branch 0 taken 3998784 times.
✓ Branch 1 taken 2515807 times.
✓ Branch 2 taken 2516267 times.
✓ Branch 3 taken 675291 times.
✓ Branch 4 taken 2500863 times.
✓ Branch 5 taken 15404 times.
 10513375 || (flush_int == Z_FINISH && retcode == Z_STREAM_END);
933 }
934
935
936 10000072 ZlibCompressor::~ZlibCompressor() {
937 5000406 int retcode = deflateEnd(&stream_);
938
1/2
✗ Branch 0 not taken.
✓ Branch 1 taken 2505003 times.
 5010006 assert(retcode == Z_OK);
939 10009672 }
940
941
942 31 size_t ZlibCompressor::DeflateBound(const size_t bytes) {
943 // Call zlib's deflate bound
944 31 return deflateBound(&stream_, bytes);
945 }
946
947
948 //------------------------------------------------------------------------------
949
950
951 75 EchoCompressor::EchoCompressor(const zlib::Algorithms &alg)
952 75 : Compressor(alg) { }
953
954
955 75 bool EchoCompressor::WillHandle(const zlib::Algorithms &alg) {
956 75 return alg == kNoCompression;
957 }
958
959
960 ✗ Compressor *EchoCompressor::Clone() {
961 ✗ return new EchoCompressor(zlib::kNoCompression);
962 }
963
964
965 6501240 bool EchoCompressor::Deflate(const bool flush, unsigned char **inbuf,
966 size_t *inbufsize, unsigned char **outbuf,
967 size_t *outbufsize) {
968 6501240 size_t bytes_to_copy = min(*outbufsize, *inbufsize);
969 6501240 memcpy(*outbuf, *inbuf, bytes_to_copy);
970 6501240 const bool done = (bytes_to_copy == *inbufsize);
971
972 // Update the return variables
973 6501240 *inbuf += bytes_to_copy;
974 6501240 *outbufsize = bytes_to_copy;
975 6501240 *inbufsize -= bytes_to_copy;
976
977 6501240 return done;
978 }
979
980
981 31 size_t EchoCompressor::DeflateBound(const size_t bytes) {
982 // zero bytes as an upper bound is no good because some callers want to
983 // allocate buffers according to this value
984
1/2
✓ Branch 0 taken 31 times.
✗ Branch 1 not taken.
 31 return (bytes == 0) ? 1 : bytes;
985 }
986
987 } // namespace zlib
988