xref: /haiku/src/kits/package/hpkg/ReaderImplBase.cpp (revision 0f4e11e75c244fd61da150011f1eae5fe79fc2a9) 
1 /*
2  * Copyright 2009-2011, Ingo Weinhold, ingo_weinhold@gmx.de.
3  * Copyright 2011, Oliver Tappe <zooey@hirschkaefer.de>
4  * Distributed under the terms of the MIT License.
5  */
6 
7 
8 #include <package/hpkg/ReaderImplBase.h>
9 
10 #include <errno.h>
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <string.h>
14 
15 #include <algorithm>
16 #include <new>
17 
18 #include <ByteOrder.h>
19 
20 #include <package/hpkg/HPKGDefsPrivate.h>
21 
22 #include <package/hpkg/DataOutput.h>
23 #include <package/hpkg/PackageFileHeapReader.h>
24 #include <package/hpkg/ZlibDecompressor.h>
25 
26 
27 namespace BPackageKit {
28 
29 namespace BHPKG {
30 
31 namespace BPrivate {
32 
33 
34 static const size_t kScratchBufferSize = 64 * 1024;
35 
36 static const uint16 kAttributeTypes[B_HPKG_ATTRIBUTE_ID_ENUM_COUNT] = {
37 	#define B_DEFINE_HPKG_ATTRIBUTE(id, type, name, constant)	\
38 		B_HPKG_ATTRIBUTE_TYPE_##type,
39 	#include <package/hpkg/PackageAttributes.h>
40 	#undef B_DEFINE_HPKG_ATTRIBUTE
41 };
42 
43 // #pragma mark - AttributeHandlerContext
44 
45 
46 ReaderImplBase::AttributeHandlerContext::AttributeHandlerContext(
47 	BErrorOutput* errorOutput, BPackageContentHandler* packageContentHandler,
48 	BHPKGPackageSectionID section, bool ignoreUnknownAttributes)
49 	:
50 	errorOutput(errorOutput),
51 	packageContentHandler(packageContentHandler),
52 	hasLowLevelHandler(false),
53 	ignoreUnknownAttributes(ignoreUnknownAttributes),
54 	section(section)
55 {
56 }
57 
58 
59 ReaderImplBase::AttributeHandlerContext::AttributeHandlerContext(
60 	BErrorOutput* errorOutput, BLowLevelPackageContentHandler* lowLevelHandler,
61 	BHPKGPackageSectionID section, bool ignoreUnknownAttributes)
62 	:
63 	errorOutput(errorOutput),
64 	lowLevelHandler(lowLevelHandler),
65 	hasLowLevelHandler(true),
66 	ignoreUnknownAttributes(ignoreUnknownAttributes),
67 	section(section)
68 {
69 }
70 
71 
72 void
73 ReaderImplBase::AttributeHandlerContext::ErrorOccurred()
74 {
75 	if (hasLowLevelHandler)
76 		lowLevelHandler->HandleErrorOccurred();
77 	else
78 		packageContentHandler->HandleErrorOccurred();
79 }
80 
81 
82 // #pragma mark - AttributeHandler
83 
84 
85 ReaderImplBase::AttributeHandler::~AttributeHandler()
86 {
87 }
88 
89 
90 void
91 ReaderImplBase::AttributeHandler::SetLevel(int level)
92 {
93 	fLevel = level;
94 }
95 
96 
97 status_t
98 ReaderImplBase::AttributeHandler::HandleAttribute(
99 	AttributeHandlerContext* context, uint8 id, const AttributeValue& value,
100 	AttributeHandler** _handler)
101 {
102 	return B_OK;
103 }
104 
105 
106 status_t
107 ReaderImplBase::AttributeHandler::Delete(AttributeHandlerContext* context)
108 {
109 	delete this;
110 	return B_OK;
111 }
112 
113 
114 // #pragma mark - PackageInfoAttributeHandlerBase
115 
116 
117 ReaderImplBase::PackageInfoAttributeHandlerBase
118 	::PackageInfoAttributeHandlerBase(
119 		BPackageInfoAttributeValue& packageInfoValue)
120 	:
121 	fPackageInfoValue(packageInfoValue)
122 {
123 }
124 
125 
126 status_t
127 ReaderImplBase::PackageInfoAttributeHandlerBase::Delete(
128 	AttributeHandlerContext* context)
129 {
130 	status_t error = context->packageContentHandler->HandlePackageAttribute(
131 		fPackageInfoValue);
132 	fPackageInfoValue.Clear();
133 
134 	delete this;
135 	return error;
136 }
137 
138 
139 // #pragma mark - PackageVersionAttributeHandler
140 
141 
142 ReaderImplBase::PackageVersionAttributeHandler::PackageVersionAttributeHandler(
143 	BPackageInfoAttributeValue& packageInfoValue,
144 	BPackageVersionData& versionData, bool notify)
145 	:
146 	PackageInfoAttributeHandlerBase(packageInfoValue),
147 	fPackageVersionData(versionData),
148 	fNotify(notify)
149 {
150 }
151 
152 
153 status_t
154 ReaderImplBase::PackageVersionAttributeHandler::HandleAttribute(
155 	AttributeHandlerContext* context, uint8 id, const AttributeValue& value,
156 	AttributeHandler** _handler)
157 {
158 	switch (id) {
159 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_VERSION_MINOR:
160 			fPackageVersionData.minor = value.string;
161 			break;
162 
163 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_VERSION_MICRO:
164 			fPackageVersionData.micro = value.string;
165 			break;
166 
167 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_VERSION_PRE_RELEASE:
168 			fPackageVersionData.preRelease = value.string;
169 			break;
170 
171 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_VERSION_REVISION:
172 			fPackageVersionData.revision = value.unsignedInt;
173 			break;
174 
175 		default:
176 			if (context->ignoreUnknownAttributes)
177 				break;
178 
179 			context->errorOutput->PrintError("Error: Invalid package "
180 				"attribute section: unexpected package attribute id %d "
181 				"encountered when parsing package version\n", id);
182 			return B_BAD_DATA;
183 	}
184 
185 	return B_OK;
186 }
187 
188 
189 status_t
190 ReaderImplBase::PackageVersionAttributeHandler::Delete(
191 	AttributeHandlerContext* context)
192 {
193 	status_t error = B_OK;
194 	if (fNotify) {
195 		fPackageInfoValue.attributeID = B_PACKAGE_INFO_VERSION;
196 		error = context->packageContentHandler->HandlePackageAttribute(
197 			fPackageInfoValue);
198 		fPackageInfoValue.Clear();
199 	}
200 
201 	delete this;
202 	return error;
203 }
204 
205 
206 // #pragma mark - PackageResolvableAttributeHandler
207 
208 
209 ReaderImplBase::PackageResolvableAttributeHandler
210 	::PackageResolvableAttributeHandler(
211 		BPackageInfoAttributeValue& packageInfoValue)
212 	:
213 	PackageInfoAttributeHandlerBase(packageInfoValue)
214 {
215 }
216 
217 
218 status_t
219 ReaderImplBase::PackageResolvableAttributeHandler::HandleAttribute(
220 	AttributeHandlerContext* context, uint8 id, const AttributeValue& value,
221 	AttributeHandler** _handler)
222 {
223 	switch (id) {
224 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_VERSION_MAJOR:
225 			fPackageInfoValue.resolvable.haveVersion = true;
226 			fPackageInfoValue.resolvable.version.major = value.string;
227 			if (_handler != NULL) {
228 				*_handler
229 					= new(std::nothrow) PackageVersionAttributeHandler(
230 						fPackageInfoValue,
231 						fPackageInfoValue.resolvable.version, false);
232 				if (*_handler == NULL)
233 					return B_NO_MEMORY;
234 			}
235 			break;
236 
237 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_PROVIDES_COMPATIBLE:
238 			fPackageInfoValue.resolvable.haveCompatibleVersion = true;
239 			fPackageInfoValue.resolvable.compatibleVersion.major = value.string;
240 			if (_handler != NULL) {
241 				*_handler
242 					= new(std::nothrow) PackageVersionAttributeHandler(
243 						fPackageInfoValue,
244 						fPackageInfoValue.resolvable.compatibleVersion, false);
245 				if (*_handler == NULL)
246 					return B_NO_MEMORY;
247 			}
248 			break;
249 
250 		default:
251 			if (context->ignoreUnknownAttributes)
252 				break;
253 
254 			context->errorOutput->PrintError("Error: Invalid package "
255 				"attribute section: unexpected package attribute id %d "
256 				"encountered when parsing package resolvable\n", id);
257 			return B_BAD_DATA;
258 	}
259 
260 	return B_OK;
261 }
262 
263 
264 // #pragma mark - PackageResolvableExpressionAttributeHandler
265 
266 
267 ReaderImplBase::PackageResolvableExpressionAttributeHandler
268 	::PackageResolvableExpressionAttributeHandler(
269 		BPackageInfoAttributeValue& packageInfoValue)
270 	:
271 	PackageInfoAttributeHandlerBase(packageInfoValue)
272 {
273 }
274 
275 
276 status_t
277 ReaderImplBase::PackageResolvableExpressionAttributeHandler::HandleAttribute(
278 	AttributeHandlerContext* context, uint8 id, const AttributeValue& value,
279 	AttributeHandler** _handler)
280 {
281 	switch (id) {
282 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_RESOLVABLE_OPERATOR:
283 			if (value.unsignedInt >= B_PACKAGE_RESOLVABLE_OP_ENUM_COUNT) {
284 				context->errorOutput->PrintError(
285 					"Error: Invalid package attribute section: invalid "
286 					"package resolvable operator %lld encountered\n",
287 					value.unsignedInt);
288 				return B_BAD_DATA;
289 			}
290 			fPackageInfoValue.resolvableExpression.op
291 				= (BPackageResolvableOperator)value.unsignedInt;
292 			break;
293 
294 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_VERSION_MAJOR:
295 			fPackageInfoValue.resolvableExpression.haveOpAndVersion = true;
296 			fPackageInfoValue.resolvableExpression.version.major
297 				= value.string;
298 			if (_handler != NULL) {
299 				*_handler
300 					= new(std::nothrow) PackageVersionAttributeHandler(
301 						fPackageInfoValue,
302 						fPackageInfoValue.resolvableExpression.version,
303 						false);
304 				if (*_handler == NULL)
305 					return B_NO_MEMORY;
306 			}
307 			return B_OK;
308 
309 		default:
310 			if (context->ignoreUnknownAttributes)
311 				break;
312 
313 			context->errorOutput->PrintError("Error: Invalid package "
314 				"attribute section: unexpected package attribute id %d "
315 				"encountered when parsing package resolvable-expression\n",
316 				id);
317 			return B_BAD_DATA;
318 	}
319 
320 	return B_OK;
321 }
322 
323 
324 // #pragma mark - GlobalSettingsFileInfoAttributeHandler
325 
326 
327 ReaderImplBase::GlobalSettingsFileInfoAttributeHandler
328 	::GlobalSettingsFileInfoAttributeHandler(
329 		BPackageInfoAttributeValue& packageInfoValue)
330 	:
331 	PackageInfoAttributeHandlerBase(packageInfoValue)
332 {
333 }
334 
335 
336 status_t
337 ReaderImplBase::GlobalSettingsFileInfoAttributeHandler::HandleAttribute(
338 	AttributeHandlerContext* context, uint8 id, const AttributeValue& value,
339 	AttributeHandler** _handler)
340 {
341 	switch (id) {
342 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_SETTINGS_FILE_UPDATE_TYPE:
343 			if (value.unsignedInt >= B_PACKAGE_RESOLVABLE_OP_ENUM_COUNT) {
344 				context->errorOutput->PrintError(
345 					"Error: Invalid package attribute section: invalid "
346 					"global settings file update type %" B_PRIu64
347 					" encountered\n", value.unsignedInt);
348 				return B_BAD_DATA;
349 			}
350 			fPackageInfoValue.globalSettingsFileInfo.updateType
351 				= (BSettingsFileUpdateType)value.unsignedInt;
352 			break;
353 
354 		default:
355 			if (context->ignoreUnknownAttributes)
356 				break;
357 
358 			context->errorOutput->PrintError("Error: Invalid package "
359 				"attribute section: unexpected package attribute id %d "
360 				"encountered when parsing global settings file info\n",
361 				id);
362 			return B_BAD_DATA;
363 	}
364 
365 	return B_OK;
366 }
367 
368 
369 // #pragma mark - UserSettingsFileInfoAttributeHandler
370 
371 
372 ReaderImplBase::UserSettingsFileInfoAttributeHandler
373 	::UserSettingsFileInfoAttributeHandler(
374 		BPackageInfoAttributeValue& packageInfoValue)
375 	:
376 	PackageInfoAttributeHandlerBase(packageInfoValue)
377 {
378 }
379 
380 
381 status_t
382 ReaderImplBase::UserSettingsFileInfoAttributeHandler::HandleAttribute(
383 	AttributeHandlerContext* context, uint8 id, const AttributeValue& value,
384 	AttributeHandler** _handler)
385 {
386 	switch (id) {
387 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_SETTINGS_FILE_TEMPLATE:
388 			fPackageInfoValue.userSettingsFileInfo.templatePath = value.string;
389 			break;
390 
391 		default:
392 			if (context->ignoreUnknownAttributes)
393 				break;
394 
395 			context->errorOutput->PrintError("Error: Invalid package "
396 				"attribute section: unexpected package attribute id %d "
397 				"encountered when parsing user settings file info\n",
398 				id);
399 			return B_BAD_DATA;
400 	}
401 
402 	return B_OK;
403 }
404 
405 
406 // #pragma mark - UserAttributeHandler
407 
408 
409 ReaderImplBase::UserAttributeHandler::UserAttributeHandler(
410 		BPackageInfoAttributeValue& packageInfoValue)
411 	:
412 	PackageInfoAttributeHandlerBase(packageInfoValue),
413 	fGroups()
414 {
415 }
416 
417 
418 status_t
419 ReaderImplBase::UserAttributeHandler::HandleAttribute(
420 	AttributeHandlerContext* context, uint8 id, const AttributeValue& value,
421 	AttributeHandler** _handler)
422 {
423 	switch (id) {
424 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_USER_REAL_NAME:
425 			fPackageInfoValue.user.realName = value.string;
426 			break;
427 
428 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_USER_HOME:
429 			fPackageInfoValue.user.home = value.string;
430 			break;
431 
432 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_USER_SHELL:
433 			fPackageInfoValue.user.shell = value.string;
434 			break;
435 
436 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_USER_GROUP:
437 			if (!fGroups.Add(value.string))
438 				return B_NO_MEMORY;
439 			break;
440 
441 		default:
442 			if (context->ignoreUnknownAttributes)
443 				break;
444 
445 			context->errorOutput->PrintError("Error: Invalid package "
446 				"attribute section: unexpected package attribute id %d "
447 				"encountered when parsing user settings file info\n",
448 				id);
449 			return B_BAD_DATA;
450 	}
451 
452 	return B_OK;
453 }
454 
455 
456 status_t
457 ReaderImplBase::UserAttributeHandler::Delete(AttributeHandlerContext* context)
458 {
459 	if (!fGroups.IsEmpty()) {
460 		fPackageInfoValue.user.groups = fGroups.Elements();
461 		fPackageInfoValue.user.groupCount = fGroups.Count();
462 	}
463 
464 	return PackageInfoAttributeHandlerBase::Delete(context);
465 }
466 
467 
468 // #pragma mark - PackageAttributeHandler
469 
470 
471 status_t
472 ReaderImplBase::PackageAttributeHandler::HandleAttribute(
473 	AttributeHandlerContext* context, uint8 id, const AttributeValue& value,
474 	AttributeHandler** _handler)
475 {
476 	switch (id) {
477 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_NAME:
478 			fPackageInfoValue.SetTo(B_PACKAGE_INFO_NAME, value.string);
479 			break;
480 
481 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_SUMMARY:
482 			fPackageInfoValue.SetTo(B_PACKAGE_INFO_SUMMARY, value.string);
483 			break;
484 
485 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_DESCRIPTION:
486 			fPackageInfoValue.SetTo(B_PACKAGE_INFO_DESCRIPTION,
487 				value.string);
488 			break;
489 
490 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_VENDOR:
491 			fPackageInfoValue.SetTo(B_PACKAGE_INFO_VENDOR, value.string);
492 			break;
493 
494 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_PACKAGER:
495 			fPackageInfoValue.SetTo(B_PACKAGE_INFO_PACKAGER, value.string);
496 			break;
497 
498 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_BASE_PACKAGE:
499 			fPackageInfoValue.SetTo(B_PACKAGE_INFO_BASE_PACKAGE, value.string);
500 			break;
501 
502 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_FLAGS:
503 			fPackageInfoValue.SetTo(B_PACKAGE_INFO_FLAGS,
504 				(uint32)value.unsignedInt);
505 			break;
506 
507 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_ARCHITECTURE:
508 			if (value.unsignedInt
509 					>= B_PACKAGE_ARCHITECTURE_ENUM_COUNT) {
510 				context->errorOutput->PrintError(
511 					"Error: Invalid package attribute section: "
512 					"Invalid package architecture %lld encountered\n",
513 					value.unsignedInt);
514 				return B_BAD_DATA;
515 			}
516 			fPackageInfoValue.SetTo(B_PACKAGE_INFO_ARCHITECTURE,
517 				(uint8)value.unsignedInt);
518 			break;
519 
520 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_VERSION_MAJOR:
521 			fPackageInfoValue.attributeID = B_PACKAGE_INFO_VERSION;
522 			fPackageInfoValue.version.major = value.string;
523 			if (_handler != NULL) {
524 				*_handler
525 					= new(std::nothrow) PackageVersionAttributeHandler(
526 						fPackageInfoValue, fPackageInfoValue.version, true);
527 				if (*_handler == NULL)
528 					return B_NO_MEMORY;
529 			}
530 			break;
531 
532 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_COPYRIGHT:
533 			fPackageInfoValue.SetTo(B_PACKAGE_INFO_COPYRIGHTS,
534 				value.string);
535 			break;
536 
537 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_LICENSE:
538 			fPackageInfoValue.SetTo(B_PACKAGE_INFO_LICENSES,
539 				value.string);
540 			break;
541 
542 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_URL:
543 			fPackageInfoValue.SetTo(B_PACKAGE_INFO_URLS, value.string);
544 			break;
545 
546 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_SOURCE_URL:
547 			fPackageInfoValue.SetTo(B_PACKAGE_INFO_SOURCE_URLS, value.string);
548 			break;
549 
550 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_PROVIDES:
551 			fPackageInfoValue.resolvable.name = value.string;
552 			fPackageInfoValue.attributeID = B_PACKAGE_INFO_PROVIDES;
553 			if (_handler != NULL) {
554 				*_handler
555 					= new(std::nothrow) PackageResolvableAttributeHandler(
556 						fPackageInfoValue);
557 				if (*_handler == NULL)
558 					return B_NO_MEMORY;
559 			}
560 			break;
561 
562 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_REQUIRES:
563 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_SUPPLEMENTS:
564 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_CONFLICTS:
565 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_FRESHENS:
566 			fPackageInfoValue.resolvableExpression.name = value.string;
567 			switch (id) {
568 				case B_HPKG_ATTRIBUTE_ID_PACKAGE_REQUIRES:
569 					fPackageInfoValue.attributeID = B_PACKAGE_INFO_REQUIRES;
570 					break;
571 
572 				case B_HPKG_ATTRIBUTE_ID_PACKAGE_SUPPLEMENTS:
573 					fPackageInfoValue.attributeID
574 						= B_PACKAGE_INFO_SUPPLEMENTS;
575 					break;
576 
577 				case B_HPKG_ATTRIBUTE_ID_PACKAGE_CONFLICTS:
578 					fPackageInfoValue.attributeID
579 						= B_PACKAGE_INFO_CONFLICTS;
580 					break;
581 
582 				case B_HPKG_ATTRIBUTE_ID_PACKAGE_FRESHENS:
583 					fPackageInfoValue.attributeID = B_PACKAGE_INFO_FRESHENS;
584 					break;
585 			}
586 			if (_handler != NULL) {
587 				*_handler = new(std::nothrow)
588 					PackageResolvableExpressionAttributeHandler(
589 						fPackageInfoValue);
590 				if (*_handler == NULL)
591 					return B_NO_MEMORY;
592 			}
593 			break;
594 
595 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_REPLACES:
596 			fPackageInfoValue.SetTo(B_PACKAGE_INFO_REPLACES, value.string);
597 			break;
598 
599 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_CHECKSUM:
600 			fPackageInfoValue.SetTo(B_PACKAGE_INFO_CHECKSUM, value.string);
601 			break;
602 
603 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_INSTALL_PATH:
604 			fPackageInfoValue.SetTo(B_PACKAGE_INFO_INSTALL_PATH, value.string);
605 			break;
606 
607 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_GLOBAL_SETTINGS_FILE:
608 			fPackageInfoValue.globalSettingsFileInfo.path = value.string;
609 			fPackageInfoValue.globalSettingsFileInfo.updateType
610 				= B_SETTINGS_FILE_UPDATE_TYPE_ENUM_COUNT;
611 			fPackageInfoValue.attributeID
612 				= B_PACKAGE_INFO_GLOBAL_SETTINGS_FILES;
613 			if (_handler != NULL) {
614 				*_handler
615 					= new(std::nothrow) GlobalSettingsFileInfoAttributeHandler(
616 						fPackageInfoValue);
617 				if (*_handler == NULL)
618 					return B_NO_MEMORY;
619 			}
620 			break;
621 
622 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_USER_SETTINGS_FILE:
623 			fPackageInfoValue.userSettingsFileInfo.path = value.string;
624 			fPackageInfoValue.attributeID
625 				= B_PACKAGE_INFO_USER_SETTINGS_FILES;
626 			if (_handler != NULL) {
627 				*_handler
628 					= new(std::nothrow) UserSettingsFileInfoAttributeHandler(
629 						fPackageInfoValue);
630 				if (*_handler == NULL)
631 					return B_NO_MEMORY;
632 			}
633 			break;
634 
635 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_USER:
636 			fPackageInfoValue.user.name = value.string;
637 			fPackageInfoValue.attributeID = B_PACKAGE_INFO_USERS;
638 			if (_handler != NULL) {
639 				*_handler = new(std::nothrow) UserAttributeHandler(
640 					fPackageInfoValue);
641 				if (*_handler == NULL)
642 					return B_NO_MEMORY;
643 			}
644 			break;
645 
646 		case B_HPKG_ATTRIBUTE_ID_PACKAGE_GROUP:
647 			fPackageInfoValue.SetTo(B_PACKAGE_INFO_GROUPS, value.string);
648 			break;
649 
650 		default:
651 			if (context->ignoreUnknownAttributes)
652 				break;
653 
654 			context->errorOutput->PrintError(
655 				"Error: Invalid package attribute section: unexpected "
656 				"package attribute id %d encountered\n", id);
657 			return B_BAD_DATA;
658 	}
659 
660 	// notify unless the current attribute has children, in which case
661 	// the child-handler will notify when it's done
662 	if (_handler == NULL) {
663 		status_t error = context->packageContentHandler
664 			->HandlePackageAttribute(fPackageInfoValue);
665 		fPackageInfoValue.Clear();
666 		if (error != B_OK)
667 			return error;
668 	}
669 
670 	return B_OK;
671 }
672 
673 
674 // #pragma mark - LowLevelAttributeHandler
675 
676 
677 ReaderImplBase::LowLevelAttributeHandler::LowLevelAttributeHandler()
678 	:
679 	fParentToken(NULL),
680 	fToken(NULL),
681 	fID(B_HPKG_ATTRIBUTE_ID_ENUM_COUNT)
682 {
683 }
684 
685 
686 ReaderImplBase::LowLevelAttributeHandler::LowLevelAttributeHandler(uint8 id,
687 	const BPackageAttributeValue& value, void* parentToken, void* token)
688 	:
689 	fParentToken(NULL),
690 	fToken(token),
691 	fID(id),
692 	fValue(value)
693 {
694 }
695 
696 
697 status_t
698 ReaderImplBase::LowLevelAttributeHandler::HandleAttribute(
699 	AttributeHandlerContext* context, uint8 id, const AttributeValue& value,
700 	AttributeHandler** _handler)
701 {
702 	// notify the content handler
703 	void* token;
704 	status_t error = context->lowLevelHandler->HandleAttribute(
705 		(BHPKGAttributeID)id, value, fToken, token);
706 	if (error != B_OK)
707 		return error;
708 
709 	// create a subhandler for the attribute, if it has children
710 	if (_handler != NULL) {
711 		*_handler = new(std::nothrow) LowLevelAttributeHandler(id, value,
712 			fToken, token);
713 		if (*_handler == NULL) {
714 			context->lowLevelHandler->HandleAttributeDone((BHPKGAttributeID)id,
715 				value, fToken, token);
716 			return B_NO_MEMORY;
717 		}
718 		return B_OK;
719 	}
720 
721 	// no children -- just call the done hook
722 	return context->lowLevelHandler->HandleAttributeDone((BHPKGAttributeID)id,
723 		value, fToken, token);
724 }
725 
726 
727 status_t
728 ReaderImplBase::LowLevelAttributeHandler::Delete(
729 	AttributeHandlerContext* context)
730 {
731 	status_t error = B_OK;
732 	if (fID != B_HPKG_ATTRIBUTE_ID_ENUM_COUNT) {
733 		error = context->lowLevelHandler->HandleAttributeDone(
734 			(BHPKGAttributeID)fID, fValue, fParentToken, fToken);
735 	}
736 
737 	delete this;
738 	return error;
739 }
740 
741 
742 // #pragma mark - ReaderImplBase
743 
744 
745 ReaderImplBase::ReaderImplBase(const char* fileType, BErrorOutput* errorOutput)
746 	:
747 	fPackageAttributesSection("package attributes"),
748 	fFileType(fileType),
749 	fErrorOutput(errorOutput),
750 	fFD(-1),
751 	fOwnsFD(false),
752 	fRawHeapReader(NULL),
753 	fHeapReader(NULL),
754 	fCurrentSection(NULL),
755 	fScratchBuffer(NULL),
756 	fScratchBufferSize(0)
757 {
758 }
759 
760 
761 ReaderImplBase::~ReaderImplBase()
762 {
763 	delete fHeapReader;
764 	if (fRawHeapReader != fHeapReader)
765 		delete fRawHeapReader;
766 
767 	if (fOwnsFD && fFD >= 0)
768 		close(fFD);
769 
770 	delete[] fScratchBuffer;
771 }
772 
773 
774 uint64
775 ReaderImplBase::UncompressedHeapSize() const
776 {
777 	return fRawHeapReader->UncompressedHeapSize();
778 }
779 
780 
781 BAbstractBufferedDataReader*
782 ReaderImplBase::DetachHeapReader(PackageFileHeapReader** _rawHeapReader)
783 {
784 	BAbstractBufferedDataReader* heapReader = fHeapReader;
785 	fHeapReader = NULL;
786 
787 	if (_rawHeapReader != NULL)
788 		*_rawHeapReader = fRawHeapReader;
789 	fRawHeapReader = NULL;
790 
791 	return heapReader;
792 }
793 
794 
795 status_t
796 ReaderImplBase::InitHeapReader(uint32 compression, uint32 chunkSize,
797 	off_t offset, uint64 compressedSize, uint64 uncompressedSize)
798 {
799 	if (compression != B_HPKG_COMPRESSION_ZLIB) {
800 		fErrorOutput->PrintError("Error: Invalid heap compression\n");
801 		return B_BAD_DATA;
802 	}
803 
804 	fRawHeapReader = new(std::nothrow) PackageFileHeapReader(fErrorOutput, fFD,
805 		offset, compressedSize, uncompressedSize);
806 	if (fRawHeapReader == NULL)
807 		return B_NO_MEMORY;
808 
809 	status_t error = fRawHeapReader->Init();
810 	if (error != B_OK)
811 		return error;
812 
813 	error = CreateCachedHeapReader(fRawHeapReader, fHeapReader);
814 	if (error != B_OK) {
815 		if (error != B_NOT_SUPPORTED)
816 			return error;
817 
818 		fHeapReader = fRawHeapReader;
819 	}
820 
821 	return B_OK;
822 }
823 
824 
825 status_t
826 ReaderImplBase::CreateCachedHeapReader(PackageFileHeapReader* heapReader,
827 	BAbstractBufferedDataReader*& _cachedReader)
828 {
829 	return B_NOT_SUPPORTED;
830 }
831 
832 
833 status_t
834 ReaderImplBase::InitSection(PackageFileSection& section, uint64 endOffset,
835 	uint64 length, uint64 maxSaneLength, uint64 stringsLength,
836 	uint64 stringsCount)
837 {
838 	// check length vs. endOffset
839 	if (length > endOffset) {
840 		ErrorOutput()->PrintError("Error: %s file %s section size is %"
841 			B_PRIu64 " bytes. This is greater than the available space\n",
842 			fFileType, section.name, length);
843 		return B_BAD_DATA;
844 	}
845 
846 	// check sanity length
847 	if (maxSaneLength > 0 && length > maxSaneLength) {
848 		ErrorOutput()->PrintError("Error: %s file %s section size is %"
849 			B_PRIu64 " bytes. This is beyond the reader's sanity limit\n",
850 			fFileType, section.name, length);
851 		return B_NOT_SUPPORTED;
852 	}
853 
854 	// check strings subsection size/count
855 	if ((stringsLength <= 1) != (stringsCount == 0) || stringsLength > length) {
856 		ErrorOutput()->PrintError("Error: strings subsection description of %s "
857 			"file %s section is invalid (%" B_PRIu64 " strings, length: %"
858 			B_PRIu64 ", section length: %" B_PRIu64 ")\n",
859 			fFileType, section.name, stringsCount, stringsLength, length);
860 		return B_BAD_DATA;
861 	}
862 
863 	section.uncompressedLength = length;
864 	section.offset = endOffset - length;
865 	section.currentOffset = 0;
866 	section.stringsLength = stringsLength;
867 	section.stringsCount = stringsCount;
868 
869 	return B_OK;
870 }
871 
872 
873 status_t
874 ReaderImplBase::PrepareSection(PackageFileSection& section)
875 {
876 	// allocate memory for the section data and read it in
877 	section.data = new(std::nothrow) uint8[section.uncompressedLength];
878 	if (section.data == NULL) {
879 		ErrorOutput()->PrintError("Error: Out of memory!\n");
880 		return B_NO_MEMORY;
881 	}
882 
883 	status_t error = ReadSection(section);
884 	if (error != B_OK)
885 		return error;
886 
887 	// parse the section strings
888 	section.currentOffset = 0;
889 	SetCurrentSection(&section);
890 
891 	error = ParseStrings();
892 	if (error != B_OK)
893 		return error;
894 
895 	return B_OK;
896 }
897 
898 
899 status_t
900 ReaderImplBase::ParseStrings()
901 {
902 	// allocate table, if there are any strings
903 	if (fCurrentSection->stringsCount == 0) {
904 		fCurrentSection->currentOffset += fCurrentSection->stringsLength;
905 		return B_OK;
906 	}
907 
908 	fCurrentSection->strings
909 		= new(std::nothrow) char*[fCurrentSection->stringsCount];
910 	if (fCurrentSection->strings == NULL) {
911 		fErrorOutput->PrintError("Error: Out of memory!\n");
912 		return B_NO_MEMORY;
913 	}
914 
915 	// parse the section and fill the table
916 	char* position
917 		= (char*)fCurrentSection->data + fCurrentSection->currentOffset;
918 	char* sectionEnd = position + fCurrentSection->stringsLength;
919 	uint32 index = 0;
920 	while (true) {
921 		if (position >= sectionEnd) {
922 			fErrorOutput->PrintError("Error: Malformed %s strings section\n",
923 				fCurrentSection->name);
924 			return B_BAD_DATA;
925 		}
926 
927 		size_t stringLength = strnlen(position, (char*)sectionEnd - position);
928 
929 		if (stringLength == 0) {
930 			if (position + 1 != sectionEnd) {
931 				fErrorOutput->PrintError(
932 					"Error: %ld excess bytes in %s strings section\n",
933 					sectionEnd - (position + 1), fCurrentSection->name);
934 				return B_BAD_DATA;
935 			}
936 
937 			if (index != fCurrentSection->stringsCount) {
938 				fErrorOutput->PrintError("Error: Invalid %s strings section: "
939 					"Less strings (%lld) than specified in the header (%lld)\n",
940 					fCurrentSection->name, index,
941 					fCurrentSection->stringsCount);
942 				return B_BAD_DATA;
943 			}
944 
945 			fCurrentSection->currentOffset += fCurrentSection->stringsLength;
946 
947 			return B_OK;
948 		}
949 
950 		if (index >= fCurrentSection->stringsCount) {
951 			fErrorOutput->PrintError("Error: Invalid %s strings section: "
952 				"More strings (%lld) than specified in the header (%lld)\n",
953 				fCurrentSection->name, index, fCurrentSection->stringsCount);
954 			return B_BAD_DATA;
955 		}
956 
957 		fCurrentSection->strings[index++] = position;
958 		position += stringLength + 1;
959 	}
960 }
961 
962 
963 status_t
964 ReaderImplBase::ParsePackageAttributesSection(
965 	AttributeHandlerContext* context, AttributeHandler* rootAttributeHandler)
966 {
967 	// parse package attributes
968 	SetCurrentSection(&fPackageAttributesSection);
969 
970 	// init the attribute handler stack
971 	rootAttributeHandler->SetLevel(0);
972 	ClearAttributeHandlerStack();
973 	PushAttributeHandler(rootAttributeHandler);
974 
975 	bool sectionHandled;
976 	status_t error = ParseAttributeTree(context, sectionHandled);
977 	if (error == B_OK && sectionHandled) {
978 		if (fPackageAttributesSection.currentOffset
979 				< fPackageAttributesSection.uncompressedLength) {
980 			fErrorOutput->PrintError("Error: %llu excess byte(s) in package "
981 				"attributes section\n",
982 				fPackageAttributesSection.uncompressedLength
983 					- fPackageAttributesSection.currentOffset);
984 			error = B_BAD_DATA;
985 		}
986 	}
987 
988 	SetCurrentSection(NULL);
989 
990 	// clean up on error
991 	if (error != B_OK) {
992 		context->ErrorOccurred();
993 		while (AttributeHandler* handler = PopAttributeHandler()) {
994 			if (handler != rootAttributeHandler)
995 				handler->Delete(context);
996 		}
997 		return error;
998 	}
999 
1000 	return B_OK;
1001 }
1002 
1003 
1004 status_t
1005 ReaderImplBase::ParseAttributeTree(AttributeHandlerContext* context,
1006 	bool& _sectionHandled)
1007 {
1008 	if (context->hasLowLevelHandler) {
1009 		bool handleSection = false;
1010 		status_t error = context->lowLevelHandler->HandleSectionStart(
1011 			context->section, handleSection);
1012 		if (error != B_OK)
1013 			return error;
1014 
1015 		if (!handleSection) {
1016 			_sectionHandled = false;
1017 			return B_OK;
1018 		}
1019 	}
1020 
1021 	status_t error = _ParseAttributeTree(context);
1022 
1023 	if (context->hasLowLevelHandler) {
1024 		status_t endError = context->lowLevelHandler->HandleSectionEnd(
1025 			context->section);
1026 		if (error == B_OK)
1027 			error = endError;
1028 	}
1029 
1030 	_sectionHandled = true;
1031 	return error;
1032 }
1033 
1034 
1035 status_t
1036 ReaderImplBase::_Init(int fd, bool keepFD)
1037 {
1038 	fFD = fd;
1039 	fOwnsFD = keepFD;
1040 
1041 	// allocate a scratch buffer
1042 	fScratchBuffer = new(std::nothrow) uint8[kScratchBufferSize];
1043 	if (fScratchBuffer == NULL) {
1044 		fErrorOutput->PrintError("Error: Out of memory!\n");
1045 		return B_NO_MEMORY;
1046 	}
1047 	fScratchBufferSize = kScratchBufferSize;
1048 
1049 	return B_OK;
1050 }
1051 
1052 
1053 status_t
1054 ReaderImplBase::_ParseAttributeTree(AttributeHandlerContext* context)
1055 {
1056 	int level = 0;
1057 
1058 	while (true) {
1059 		uint8 id;
1060 		AttributeValue value;
1061 		bool hasChildren;
1062 		uint64 tag;
1063 
1064 		status_t error = _ReadAttribute(id, value, &hasChildren, &tag);
1065 		if (error != B_OK)
1066 			return error;
1067 
1068 		if (tag == 0) {
1069 			AttributeHandler* handler = PopAttributeHandler();
1070 			if (level-- == 0)
1071 				return B_OK;
1072 
1073 			error = handler->Delete(context);
1074 			if (error != B_OK)
1075 				return error;
1076 
1077 			continue;
1078 		}
1079 
1080 		AttributeHandler* childHandler = NULL;
1081 		error = CurrentAttributeHandler()->HandleAttribute(context, id, value,
1082 			hasChildren ? &childHandler : NULL);
1083 		if (error != B_OK)
1084 			return error;
1085 
1086 		// parse children
1087 		if (hasChildren) {
1088 			// create an ignore handler, if necessary
1089 			if (childHandler == NULL) {
1090 				childHandler = new(std::nothrow) IgnoreAttributeHandler;
1091 				if (childHandler == NULL) {
1092 					fErrorOutput->PrintError("Error: Out of memory!\n");
1093 					return B_NO_MEMORY;
1094 				}
1095 			}
1096 
1097 			childHandler->SetLevel(++level);
1098 			PushAttributeHandler(childHandler);
1099 		}
1100 	}
1101 }
1102 
1103 
1104 status_t
1105 ReaderImplBase::_ReadAttribute(uint8& _id, AttributeValue& _value,
1106 	bool* _hasChildren, uint64* _tag)
1107 {
1108 	uint64 tag;
1109 	status_t error = ReadUnsignedLEB128(tag);
1110 	if (error != B_OK)
1111 		return error;
1112 
1113 	if (tag != 0) {
1114 		// get the type
1115 		uint16 type = attribute_tag_type(tag);
1116 		if (type >= B_HPKG_ATTRIBUTE_TYPE_ENUM_COUNT) {
1117 			fErrorOutput->PrintError("Error: Invalid %s section: attribute "
1118 				"type %d not supported!\n", fCurrentSection->name, type);
1119 			return B_BAD_DATA;
1120 		}
1121 
1122 		// get the ID
1123 		_id = attribute_tag_id(tag);
1124 		if (_id < B_HPKG_ATTRIBUTE_ID_ENUM_COUNT) {
1125 			if (type != kAttributeTypes[_id]) {
1126 				fErrorOutput->PrintError("Error: Invalid %s section: "
1127 					"unexpected type %d for attribute id %d (expected %d)!\n",
1128 					fCurrentSection->name, type, _id, kAttributeTypes[_id]);
1129 				return B_BAD_DATA;
1130 			}
1131 		} else if (fMinorFormatVersion <= fCurrentMinorFormatVersion) {
1132 			fErrorOutput->PrintError("Error: Invalid %s section: "
1133 				"attribute id %d not supported!\n", fCurrentSection->name, _id);
1134 			return B_BAD_DATA;
1135 		}
1136 
1137 		// get the value
1138 		error = ReadAttributeValue(type, attribute_tag_encoding(tag),
1139 			_value);
1140 		if (error != B_OK)
1141 			return error;
1142 	}
1143 
1144 	if (_hasChildren != NULL)
1145 		*_hasChildren = attribute_tag_has_children(tag);
1146 	if (_tag != NULL)
1147 		*_tag = tag;
1148 
1149 	return B_OK;
1150 }
1151 
1152 
1153 status_t
1154 ReaderImplBase::ReadAttributeValue(uint8 type, uint8 encoding,
1155 	AttributeValue& _value)
1156 {
1157 	switch (type) {
1158 		case B_HPKG_ATTRIBUTE_TYPE_INT:
1159 		case B_HPKG_ATTRIBUTE_TYPE_UINT:
1160 		{
1161 			uint64 intValue;
1162 			status_t error;
1163 
1164 			switch (encoding) {
1165 				case B_HPKG_ATTRIBUTE_ENCODING_INT_8_BIT:
1166 				{
1167 					uint8 value;
1168 					error = _Read(value);
1169 					intValue = value;
1170 					break;
1171 				}
1172 				case B_HPKG_ATTRIBUTE_ENCODING_INT_16_BIT:
1173 				{
1174 					uint16 value;
1175 					error = _Read(value);
1176 					intValue = B_BENDIAN_TO_HOST_INT16(value);
1177 					break;
1178 				}
1179 				case B_HPKG_ATTRIBUTE_ENCODING_INT_32_BIT:
1180 				{
1181 					uint32 value;
1182 					error = _Read(value);
1183 					intValue = B_BENDIAN_TO_HOST_INT32(value);
1184 					break;
1185 				}
1186 				case B_HPKG_ATTRIBUTE_ENCODING_INT_64_BIT:
1187 				{
1188 					uint64 value;
1189 					error = _Read(value);
1190 					intValue = B_BENDIAN_TO_HOST_INT64(value);
1191 					break;
1192 				}
1193 				default:
1194 				{
1195 					fErrorOutput->PrintError("Error: Invalid %s section: "
1196 						"invalid encoding %d for int value type %d\n",
1197 						fCurrentSection->name, encoding, type);
1198 					return B_BAD_VALUE;
1199 				}
1200 			}
1201 
1202 			if (error != B_OK)
1203 				return error;
1204 
1205 			if (type == B_HPKG_ATTRIBUTE_TYPE_INT)
1206 				_value.SetTo((int64)intValue);
1207 			else
1208 				_value.SetTo(intValue);
1209 
1210 			return B_OK;
1211 		}
1212 
1213 		case B_HPKG_ATTRIBUTE_TYPE_STRING:
1214 		{
1215 			if (encoding == B_HPKG_ATTRIBUTE_ENCODING_STRING_TABLE) {
1216 				uint64 index;
1217 				status_t error = ReadUnsignedLEB128(index);
1218 				if (error != B_OK)
1219 					return error;
1220 
1221 				if (index > fCurrentSection->stringsCount) {
1222 					fErrorOutput->PrintError("Error: Invalid %s section: "
1223 						"string reference (%lld) out of bounds (%lld)\n",
1224 						fCurrentSection->name, index,
1225 						fCurrentSection->stringsCount);
1226 					return B_BAD_DATA;
1227 				}
1228 
1229 				_value.SetTo(fCurrentSection->strings[index]);
1230 			} else if (encoding == B_HPKG_ATTRIBUTE_ENCODING_STRING_INLINE) {
1231 				const char* string;
1232 				status_t error = _ReadString(string);
1233 				if (error != B_OK)
1234 					return error;
1235 
1236 				_value.SetTo(string);
1237 			} else {
1238 				fErrorOutput->PrintError("Error: Invalid %s section: invalid "
1239 					"string encoding (%u)\n", fCurrentSection->name, encoding);
1240 				return B_BAD_DATA;
1241 			}
1242 
1243 			return B_OK;
1244 		}
1245 
1246 		default:
1247 			fErrorOutput->PrintError("Error: Invalid %s section: invalid "
1248 				"value type: %d\n", fCurrentSection->name, type);
1249 			return B_BAD_DATA;
1250 	}
1251 }
1252 
1253 
1254 status_t
1255 ReaderImplBase::ReadUnsignedLEB128(uint64& _value)
1256 {
1257 	uint64 result = 0;
1258 	int shift = 0;
1259 	while (true) {
1260 		uint8 byte;
1261 		status_t error = _Read(byte);
1262 		if (error != B_OK)
1263 			return error;
1264 
1265 		result |= uint64(byte & 0x7f) << shift;
1266 		if ((byte & 0x80) == 0)
1267 			break;
1268 		shift += 7;
1269 	}
1270 
1271 	_value = result;
1272 	return B_OK;
1273 }
1274 
1275 
1276 status_t
1277 ReaderImplBase::_ReadString(const char*& _string, size_t* _stringLength)
1278 {
1279 	const char* string
1280 		= (const char*)fCurrentSection->data + fCurrentSection->currentOffset;
1281 	size_t stringLength = strnlen(string,
1282 		fCurrentSection->uncompressedLength - fCurrentSection->currentOffset);
1283 
1284 	if (stringLength
1285 		== fCurrentSection->uncompressedLength
1286 			- fCurrentSection->currentOffset) {
1287 		fErrorOutput->PrintError(
1288 			"_ReadString(): string extends beyond %s end\n",
1289 			fCurrentSection->name);
1290 		return B_BAD_DATA;
1291 	}
1292 
1293 	_string = string;
1294 	if (_stringLength != NULL)
1295 		*_stringLength = stringLength;
1296 
1297 	fCurrentSection->currentOffset += stringLength + 1;
1298 	return B_OK;
1299 }
1300 
1301 
1302 status_t
1303 ReaderImplBase::_ReadSectionBuffer(void* buffer, size_t size)
1304 {
1305 	if (size > fCurrentSection->uncompressedLength
1306 			- fCurrentSection->currentOffset) {
1307 		fErrorOutput->PrintError(
1308 			"_ReadSectionBuffer(%lu): read beyond %s end\n", size,
1309 			fCurrentSection->name);
1310 		return B_BAD_DATA;
1311 	}
1312 
1313 	memcpy(buffer, fCurrentSection->data + fCurrentSection->currentOffset,
1314 		size);
1315 	fCurrentSection->currentOffset += size;
1316 	return B_OK;
1317 }
1318 
1319 
1320 status_t
1321 ReaderImplBase::ReadBuffer(off_t offset, void* buffer, size_t size)
1322 {
1323 	ssize_t bytesRead = pread(fFD, buffer, size, offset);
1324 	if (bytesRead < 0) {
1325 		fErrorOutput->PrintError("_ReadBuffer(%p, %lu) failed to read data: "
1326 			"%s\n", buffer, size, strerror(errno));
1327 		return errno;
1328 	}
1329 	if ((size_t)bytesRead != size) {
1330 		fErrorOutput->PrintError("_ReadBuffer(%p, %lu) failed to read all "
1331 			"data\n", buffer, size);
1332 		return B_ERROR;
1333 	}
1334 
1335 	return B_OK;
1336 }
1337 
1338 
1339 status_t
1340 ReaderImplBase::ReadSection(const PackageFileSection& section)
1341 {
1342 	BBufferDataOutput output(section.data, section.uncompressedLength);
1343 	return fHeapReader->ReadDataToOutput(section.offset,
1344 		section.uncompressedLength, &output);
1345 }
1346 
1347 
1348 }	// namespace BPrivate
1349 
1350 }	// namespace BHPKG
1351 
1352 }	// namespace BPackageKit
1353