tools/aapt2/Debug.cpp - platform/frameworks/base - Gitiles

 /*
  * Copyright (C) 2015 The Android Open Source Project
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
  *      http://www.apache.org/licenses/LICENSE-2.0
  *
  * Unless required by applicable law or agreed to in writing, software
  * distributed under the License is distributed on an "AS IS" BASIS,
  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */

 #include "Debug.h"

 #include <algorithm>
 #include <map>
 #include <memory>
 #include <queue>
 #include <set>
 #include <vector>

 #include "android-base/logging.h"
 #include "android-base/stringprintf.h"

 #include "ResourceTable.h"
 #include "ResourceValues.h"
 #include "ValueVisitor.h"
 #include "text/Printer.h"
 #include "util/Util.h"

 using ::aapt::text::Printer;
 using ::android::StringPiece;
 using ::android::base::StringPrintf;

 namespace aapt {

 namespace {

 class ValueHeadlinePrinter : public ConstValueVisitor {
  public:
   using ConstValueVisitor::Visit;

   explicit ValueHeadlinePrinter(const std::string& package, Printer* printer)
       : package_(package), printer_(printer) {
   }

   void Visit(const Attribute* attr) override {
     printer_->Print("(attr) type=");
     printer_->Print(attr->MaskString());
     if (!attr->symbols.empty()) {
       printer_->Print(StringPrintf(" size=%zd", attr->symbols.size()));
     }
   }

   void Visit(const Style* style) override {
     printer_->Print(StringPrintf("(style) size=%zd", style->entries.size()));
     if (style->parent) {
       printer_->Print(" parent=");

       const Reference& parent_ref = style->parent.value();
       if (parent_ref.name) {
         if (parent_ref.private_reference) {
           printer_->Print("*");
         }

         const ResourceName& parent_name = parent_ref.name.value();
         if (package_ != parent_name.package) {
           printer_->Print(parent_name.package);
           printer_->Print(":");
         }
         printer_->Print(to_string(parent_name.type));
         printer_->Print("/");
         printer_->Print(parent_name.entry);
         if (parent_ref.id) {
           printer_->Print(" (");
           printer_->Print(parent_ref.id.value().to_string());
           printer_->Print(")");
         }
       } else if (parent_ref.id) {
         printer_->Print(parent_ref.id.value().to_string());
       } else {
         printer_->Print("???");
       }
     }
   }

   void Visit(const Array* array) override {
     printer_->Print(StringPrintf("(array) size=%zd", array->elements.size()));
   }

   void Visit(const Plural* plural) override {
     size_t count = std::count_if(plural->values.begin(), plural->values.end(),
                                  [](const std::unique_ptr<Item>& v) { return v != nullptr; });
     printer_->Print(StringPrintf("(plurals) size=%zd", count));
   }

   void Visit(const Styleable* styleable) override {
     printer_->Println(StringPrintf("(styleable) size=%zd", styleable->entries.size()));
   }

   void VisitItem(const Item* item) override {
     // Pretty much guaranteed to be one line.
     if (const Reference* ref = ValueCast<Reference>(item)) {
       // Special case Reference so that we can print local resources without a package name.
       ref->PrettyPrint(package_, printer_);
     } else {
       item->PrettyPrint(printer_);
     }
   }

  private:
   std::string package_;
   Printer* printer_;
 };

 class ValueBodyPrinter : public ConstValueVisitor {
  public:
   using ConstValueVisitor::Visit;

   explicit ValueBodyPrinter(const std::string& package, Printer* printer)
       : package_(package), printer_(printer) {
   }

   void Visit(const Attribute* attr) override {
     constexpr uint32_t kMask = android::ResTable_map::TYPE_ENUM | android::ResTable_map::TYPE_FLAGS;
     if (attr->type_mask & kMask) {
       for (const auto& symbol : attr->symbols) {
         printer_->Print(symbol.symbol.name.value().entry);
         if (symbol.symbol.id) {
           printer_->Print("(");
           printer_->Print(symbol.symbol.id.value().to_string());
           printer_->Print(")");
         }
         printer_->Println(StringPrintf("=0x%08x", symbol.value));
       }
     }
   }

   void Visit(const Style* style) override {
     for (const auto& entry : style->entries) {
       if (entry.key.name) {
         const ResourceName& name = entry.key.name.value();
         if (!name.package.empty() && name.package != package_) {
           printer_->Print(name.package);
           printer_->Print(":");
         }
         printer_->Print(name.entry);

         if (entry.key.id) {
           printer_->Print("(");
           printer_->Print(entry.key.id.value().to_string());
           printer_->Print(")");
         }
       } else if (entry.key.id) {
         printer_->Print(entry.key.id.value().to_string());
       } else {
         printer_->Print("???");
       }

       printer_->Print("=");
       PrintItem(*entry.value);
       printer_->Println();
     }
   }

   void Visit(const Array* array) override {
     const size_t count = array->elements.size();
     printer_->Print("[");
     if (count > 0) {
       for (size_t i = 0u; i < count; i++) {
         if (i != 0u && i % 4u == 0u) {
           printer_->Println();
           printer_->Print(" ");
         }
         PrintItem(*array->elements[i]);
         if (i != count - 1) {
           printer_->Print(", ");
         }
       }
       printer_->Println("]");
     }
   }

   void Visit(const Plural* plural) override {
     constexpr std::array<const char*, Plural::Count> kPluralNames = {
         {"zero", "one", "two", "few", "many", "other"}};

     for (size_t i = 0; i < Plural::Count; i++) {
       if (plural->values[i] != nullptr) {
         printer_->Print(StringPrintf("%s=", kPluralNames[i]));
         PrintItem(*plural->values[i]);
         printer_->Println();
       }
     }
   }

   void Visit(const Styleable* styleable) override {
     for (const auto& attr : styleable->entries) {
       if (attr.name) {
         const ResourceName& name = attr.name.value();
         if (!name.package.empty() && name.package != package_) {
           printer_->Print(name.package);
           printer_->Print(":");
         }
         printer_->Print(name.entry);

         if (attr.id) {
           printer_->Print("(");
           printer_->Print(attr.id.value().to_string());
           printer_->Print(")");
         }
       }

       if (attr.id) {
         printer_->Print(attr.id.value().to_string());
       }
       printer_->Println();
     }
   }

   void VisitItem(const Item* item) override {
     // Intentionally left empty, we already printed the Items.
   }

  private:
   void PrintItem(const Item& item) {
     if (const Reference* ref = ValueCast<Reference>(&item)) {
       // Special case Reference so that we can print local resources without a package name.
       ref->PrettyPrint(package_, printer_);
     } else {
       item.PrettyPrint(printer_);
     }
   }

   std::string package_;
   Printer* printer_;
 };

 }  // namespace

 void Debug::PrintTable(const ResourceTable& table, const DebugPrintTableOptions& options,
                        Printer* printer) {
   for (const auto& package : table.packages) {
     ValueHeadlinePrinter headline_printer(package->name, printer);
     ValueBodyPrinter body_printer(package->name, printer);

     printer->Print("Package name=");
     printer->Print(package->name);
     if (package->id) {
       printer->Print(StringPrintf(" id=%02x", package->id.value()));
     }
     printer->Println();

     printer->Indent();
     for (const auto& type : package->types) {
       printer->Print("type ");
       printer->Print(to_string(type->type));
       if (type->id) {
         printer->Print(StringPrintf(" id=%02x", type->id.value()));
       }
       printer->Println(StringPrintf(" entryCount=%zd", type->entries.size()));

       std::vector<const ResourceEntry*> sorted_entries;
       for (const auto& entry : type->entries) {
         auto iter = std::lower_bound(
             sorted_entries.begin(), sorted_entries.end(), entry.get(),
             [](const ResourceEntry* a, const ResourceEntry* b) -> bool {
               if (a->id && b->id) {
                 return a->id.value() < b->id.value();
               } else if (a->id) {
                 return true;
               } else {
                 return false;
               }
             });
         sorted_entries.insert(iter, entry.get());
       }

       printer->Indent();
       for (const ResourceEntry* entry : sorted_entries) {
         const ResourceId id(package->id.value_or_default(0), type->id.value_or_default(0),
                             entry->id.value_or_default(0));

         printer->Print("resource ");
         printer->Print(id.to_string());
         printer->Print(" ");

         // Write the name without the package (this is obvious and too verbose).
         printer->Print(to_string(type->type));
         printer->Print("/");
         printer->Print(entry->name);

         switch (entry->symbol_status.state) {
           case SymbolState::kPublic:
             printer->Print(" PUBLIC");
             break;
           case SymbolState::kPrivate:
             printer->Print(" _PRIVATE_");
             break;
           case SymbolState::kUndefined:
             // Print nothing.
             break;
         }

         printer->Println();

         printer->Indent();
         for (const auto& value : entry->values) {
           printer->Print("(");
           printer->Print(value->config.to_string());
           printer->Print(") ");
           value->value->Accept(&headline_printer);
           if (options.show_sources && !value->value->GetSource().path.empty()) {
             printer->Print(" src=");
             printer->Print(value->value->GetSource().to_string());
           }
           printer->Println();
           printer->Indent();
           value->value->Accept(&body_printer);
           printer->Undent();
         }
         printer->Undent();
       }
       printer->Undent();
     }
     printer->Undent();
   }
 }

 static size_t GetNodeIndex(const std::vector<ResourceName>& names, const ResourceName& name) {
   auto iter = std::lower_bound(names.begin(), names.end(), name);
   CHECK(iter != names.end());
   CHECK(*iter == name);
   return std::distance(names.begin(), iter);
 }

 void Debug::PrintStyleGraph(ResourceTable* table, const ResourceName& target_style) {
   std::map<ResourceName, std::set<ResourceName>> graph;

   std::queue<ResourceName> styles_to_visit;
   styles_to_visit.push(target_style);
   for (; !styles_to_visit.empty(); styles_to_visit.pop()) {
     const ResourceName& style_name = styles_to_visit.front();
     std::set<ResourceName>& parents = graph[style_name];
     if (!parents.empty()) {
       // We've already visited this style.
       continue;
     }

     Maybe<ResourceTable::SearchResult> result = table->FindResource(style_name);
     if (result) {
       ResourceEntry* entry = result.value().entry;
       for (const auto& value : entry->values) {
         if (Style* style = ValueCast<Style>(value->value.get())) {
           if (style->parent && style->parent.value().name) {
             parents.insert(style->parent.value().name.value());
             styles_to_visit.push(style->parent.value().name.value());
           }
         }
       }
     }
   }

   std::vector<ResourceName> names;
   for (const auto& entry : graph) {
     names.push_back(entry.first);
   }

   std::cout << "digraph styles {\n";
   for (const auto& name : names) {
     std::cout << "  node_" << GetNodeIndex(names, name) << " [label=\"" << name << "\"];\n";
   }

   for (const auto& entry : graph) {
     const ResourceName& style_name = entry.first;
     size_t style_node_index = GetNodeIndex(names, style_name);

     for (const auto& parent_name : entry.second) {
       std::cout << "  node_" << style_node_index << " -> "
                 << "node_" << GetNodeIndex(names, parent_name) << ";\n";
     }
   }

   std::cout << "}" << std::endl;
 }

 void Debug::DumpHex(const void* data, size_t len) {
   const uint8_t* d = (const uint8_t*)data;
   for (size_t i = 0; i < len; i++) {
     std::cerr << std::hex << std::setfill('0') << std::setw(2) << (uint32_t)d[i] << " ";
     if (i % 8 == 7) {
       std::cerr << "\n";
     }
   }

   if (len - 1 % 8 != 7) {
     std::cerr << std::endl;
   }
 }

 namespace {

 class XmlPrinter : public xml::ConstVisitor {
  public:
   using xml::ConstVisitor::Visit;

   void Visit(const xml::Element* el) override {
     const size_t previous_size = prefix_.size();

     for (const xml::NamespaceDecl& decl : el->namespace_decls) {
       std::cerr << prefix_ << "N: " << decl.prefix << "=" << decl.uri
                 << " (line=" << decl.line_number << ")\n";
       prefix_ += "  ";
     }

     std::cerr << prefix_ << "E: ";
     if (!el->namespace_uri.empty()) {
       std::cerr << el->namespace_uri << ":";
     }
     std::cerr << el->name << " (line=" << el->line_number << ")\n";

     for (const xml::Attribute& attr : el->attributes) {
       std::cerr << prefix_ << "  A: ";
       if (!attr.namespace_uri.empty()) {
         std::cerr << attr.namespace_uri << ":";
       }
       std::cerr << attr.name;

       if (attr.compiled_attribute) {
         std::cerr << "(" << attr.compiled_attribute.value().id.value_or_default(ResourceId(0x0))
                   << ")";
       }
       std::cerr << "=";
       if (attr.compiled_value != nullptr) {
         std::cerr << *attr.compiled_value;
       } else {
         std::cerr << attr.value;
       }
       std::cerr << "\n";
     }

     prefix_ += "  ";
     xml::ConstVisitor::Visit(el);
     prefix_.resize(previous_size);
   }

   void Visit(const xml::Text* text) override {
     std::cerr << prefix_ << "T: '" << text->text << "'\n";
   }

  private:
   std::string prefix_;
 };

 }  // namespace

 void Debug::DumpXml(const xml::XmlResource& doc) {
   XmlPrinter printer;
   doc.root->Accept(&printer);
 }

 }  // namespace aapt
	/*
	* Copyright (C) 2015 The Android Open Source Project
	*
	* Licensed under the Apache License, Version 2.0 (the "License");
	* you may not use this file except in compliance with the License.
	* You may obtain a copy of the License at
	*
	* http://www.apache.org/licenses/LICENSE-2.0
	*
	* Unless required by applicable law or agreed to in writing, software
	* distributed under the License is distributed on an "AS IS" BASIS,
	* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
	* See the License for the specific language governing permissions and
	* limitations under the License.
	*/

	#include "Debug.h"

	#include <algorithm>
	#include <map>
	#include <memory>
	#include <queue>
	#include <set>
	#include <vector>

	#include "android-base/logging.h"
	#include "android-base/stringprintf.h"

	#include "ResourceTable.h"
	#include "ResourceValues.h"
	#include "ValueVisitor.h"
	#include "text/Printer.h"
	#include "util/Util.h"

	using ::aapt::text::Printer;
	using ::android::StringPiece;
	using ::android::base::StringPrintf;

	namespace aapt {

	namespace {

	class ValueHeadlinePrinter : public ConstValueVisitor {
	public:
	using ConstValueVisitor::Visit;

	explicit ValueHeadlinePrinter(const std::string& package, Printer* printer)
	: package_(package), printer_(printer) {
	}

	void Visit(const Attribute* attr) override {
	printer_->Print("(attr) type=");
	printer_->Print(attr->MaskString());
	if (!attr->symbols.empty()) {
	printer_->Print(StringPrintf(" size=%zd", attr->symbols.size()));
	}
	}

	void Visit(const Style* style) override {
	printer_->Print(StringPrintf("(style) size=%zd", style->entries.size()));
	if (style->parent) {
	printer_->Print(" parent=");

	const Reference& parent_ref = style->parent.value();
	if (parent_ref.name) {
	if (parent_ref.private_reference) {
	printer_->Print("*");
	}

	const ResourceName& parent_name = parent_ref.name.value();
	if (package_ != parent_name.package) {
	printer_->Print(parent_name.package);
	printer_->Print(":");
	}
	printer_->Print(to_string(parent_name.type));
	printer_->Print("/");
	printer_->Print(parent_name.entry);
	if (parent_ref.id) {
	printer_->Print(" (");
	printer_->Print(parent_ref.id.value().to_string());
	printer_->Print(")");
	}
	} else if (parent_ref.id) {
	printer_->Print(parent_ref.id.value().to_string());
	} else {
	printer_->Print("???");
	}
	}
	}

	void Visit(const Array* array) override {
	printer_->Print(StringPrintf("(array) size=%zd", array->elements.size()));
	}

	void Visit(const Plural* plural) override {
	size_t count = std::count_if(plural->values.begin(), plural->values.end(),
	[](const std::unique_ptr<Item>& v) { return v != nullptr; });
	printer_->Print(StringPrintf("(plurals) size=%zd", count));
	}

	void Visit(const Styleable* styleable) override {
	printer_->Println(StringPrintf("(styleable) size=%zd", styleable->entries.size()));
	}

	void VisitItem(const Item* item) override {
	// Pretty much guaranteed to be one line.
	if (const Reference* ref = ValueCast<Reference>(item)) {
	// Special case Reference so that we can print local resources without a package name.
	ref->PrettyPrint(package_, printer_);
	} else {
	item->PrettyPrint(printer_);
	}
	}

	private:
	std::string package_;
	Printer* printer_;
	};

	class ValueBodyPrinter : public ConstValueVisitor {
	public:
	using ConstValueVisitor::Visit;

	explicit ValueBodyPrinter(const std::string& package, Printer* printer)
	: package_(package), printer_(printer) {
	}

	void Visit(const Attribute* attr) override {
	constexpr uint32_t kMask = android::ResTable_map::TYPE_ENUM \| android::ResTable_map::TYPE_FLAGS;
	if (attr->type_mask & kMask) {
	for (const auto& symbol : attr->symbols) {
	printer_->Print(symbol.symbol.name.value().entry);
	if (symbol.symbol.id) {
	printer_->Print("(");
	printer_->Print(symbol.symbol.id.value().to_string());
	printer_->Print(")");
	}
	printer_->Println(StringPrintf("=0x%08x", symbol.value));
	}
	}
	}

	void Visit(const Style* style) override {
	for (const auto& entry : style->entries) {
	if (entry.key.name) {
	const ResourceName& name = entry.key.name.value();
	if (!name.package.empty() && name.package != package_) {
	printer_->Print(name.package);
	printer_->Print(":");
	}
	printer_->Print(name.entry);

	if (entry.key.id) {
	printer_->Print("(");
	printer_->Print(entry.key.id.value().to_string());
	printer_->Print(")");
	}
	} else if (entry.key.id) {
	printer_->Print(entry.key.id.value().to_string());
	} else {
	printer_->Print("???");
	}

	printer_->Print("=");
	PrintItem(*entry.value);
	printer_->Println();
	}
	}

	void Visit(const Array* array) override {
	const size_t count = array->elements.size();
	printer_->Print("[");
	if (count > 0) {
	for (size_t i = 0u; i < count; i++) {
	if (i != 0u && i % 4u == 0u) {
	printer_->Println();
	printer_->Print(" ");
	}
	PrintItem(*array->elements[i]);
	if (i != count - 1) {
	printer_->Print(", ");
	}
	}
	printer_->Println("]");
	}
	}

	void Visit(const Plural* plural) override {
	constexpr std::array<const char*, Plural::Count> kPluralNames = {
	{"zero", "one", "two", "few", "many", "other"}};

	for (size_t i = 0; i < Plural::Count; i++) {
	if (plural->values[i] != nullptr) {
	printer_->Print(StringPrintf("%s=", kPluralNames[i]));
	PrintItem(*plural->values[i]);
	printer_->Println();
	}
	}
	}

	void Visit(const Styleable* styleable) override {
	for (const auto& attr : styleable->entries) {
	if (attr.name) {
	const ResourceName& name = attr.name.value();
	if (!name.package.empty() && name.package != package_) {
	printer_->Print(name.package);
	printer_->Print(":");
	}
	printer_->Print(name.entry);

	if (attr.id) {
	printer_->Print("(");
	printer_->Print(attr.id.value().to_string());
	printer_->Print(")");
	}
	}

	if (attr.id) {
	printer_->Print(attr.id.value().to_string());
	}
	printer_->Println();
	}
	}

	void VisitItem(const Item* item) override {
	// Intentionally left empty, we already printed the Items.
	}

	private:
	void PrintItem(const Item& item) {
	if (const Reference* ref = ValueCast<Reference>(&item)) {
	// Special case Reference so that we can print local resources without a package name.
	ref->PrettyPrint(package_, printer_);
	} else {
	item.PrettyPrint(printer_);
	}
	}

	std::string package_;
	Printer* printer_;
	};

	} // namespace

	void Debug::PrintTable(const ResourceTable& table, const DebugPrintTableOptions& options,
	Printer* printer) {
	for (const auto& package : table.packages) {
	ValueHeadlinePrinter headline_printer(package->name, printer);
	ValueBodyPrinter body_printer(package->name, printer);

	printer->Print("Package name=");
	printer->Print(package->name);
	if (package->id) {
	printer->Print(StringPrintf(" id=%02x", package->id.value()));
	}
	printer->Println();

	printer->Indent();
	for (const auto& type : package->types) {
	printer->Print("type ");
	printer->Print(to_string(type->type));
	if (type->id) {
	printer->Print(StringPrintf(" id=%02x", type->id.value()));
	}
	printer->Println(StringPrintf(" entryCount=%zd", type->entries.size()));

	std::vector<const ResourceEntry*> sorted_entries;
	for (const auto& entry : type->entries) {
	auto iter = std::lower_bound(
	sorted_entries.begin(), sorted_entries.end(), entry.get(),
	[](const ResourceEntry* a, const ResourceEntry* b) -> bool {
	if (a->id && b->id) {
	return a->id.value() < b->id.value();
	} else if (a->id) {
	return true;
	} else {
	return false;
	}
	});
	sorted_entries.insert(iter, entry.get());
	}

	printer->Indent();
	for (const ResourceEntry* entry : sorted_entries) {
	const ResourceId id(package->id.value_or_default(0), type->id.value_or_default(0),
	entry->id.value_or_default(0));

	printer->Print("resource ");
	printer->Print(id.to_string());
	printer->Print(" ");

	// Write the name without the package (this is obvious and too verbose).
	printer->Print(to_string(type->type));
	printer->Print("/");
	printer->Print(entry->name);

	switch (entry->symbol_status.state) {
	case SymbolState::kPublic:
	printer->Print(" PUBLIC");
	break;
	case SymbolState::kPrivate:
	printer->Print(" _PRIVATE_");
	break;
	case SymbolState::kUndefined:
	// Print nothing.
	break;
	}

	printer->Println();

	printer->Indent();
	for (const auto& value : entry->values) {
	printer->Print("(");
	printer->Print(value->config.to_string());
	printer->Print(") ");
	value->value->Accept(&headline_printer);
	if (options.show_sources && !value->value->GetSource().path.empty()) {
	printer->Print(" src=");
	printer->Print(value->value->GetSource().to_string());
	}
	printer->Println();
	printer->Indent();
	value->value->Accept(&body_printer);
	printer->Undent();
	}
	printer->Undent();
	}
	printer->Undent();
	}
	printer->Undent();
	}
	}

	static size_t GetNodeIndex(const std::vector<ResourceName>& names, const ResourceName& name) {
	auto iter = std::lower_bound(names.begin(), names.end(), name);
	CHECK(iter != names.end());
	CHECK(*iter == name);
	return std::distance(names.begin(), iter);
	}

	void Debug::PrintStyleGraph(ResourceTable* table, const ResourceName& target_style) {
	std::map<ResourceName, std::set<ResourceName>> graph;

	std::queue<ResourceName> styles_to_visit;
	styles_to_visit.push(target_style);
	for (; !styles_to_visit.empty(); styles_to_visit.pop()) {
	const ResourceName& style_name = styles_to_visit.front();
	std::set<ResourceName>& parents = graph[style_name];
	if (!parents.empty()) {
	// We've already visited this style.
	continue;
	}

	Maybe<ResourceTable::SearchResult> result = table->FindResource(style_name);
	if (result) {
	ResourceEntry* entry = result.value().entry;
	for (const auto& value : entry->values) {
	if (Style* style = ValueCast<Style>(value->value.get())) {
	if (style->parent && style->parent.value().name) {
	parents.insert(style->parent.value().name.value());
	styles_to_visit.push(style->parent.value().name.value());
	}
	}
	}
	}
	}

	std::vector<ResourceName> names;
	for (const auto& entry : graph) {
	names.push_back(entry.first);
	}

	std::cout << "digraph styles {\n";
	for (const auto& name : names) {
	std::cout << " node_" << GetNodeIndex(names, name) << " [label=\"" << name << "\"];\n";
	}

	for (const auto& entry : graph) {
	const ResourceName& style_name = entry.first;
	size_t style_node_index = GetNodeIndex(names, style_name);

	for (const auto& parent_name : entry.second) {
	std::cout << " node_" << style_node_index << " -> "
	<< "node_" << GetNodeIndex(names, parent_name) << ";\n";
	}
	}

	std::cout << "}" << std::endl;
	}

	void Debug::DumpHex(const void* data, size_t len) {
	const uint8_t* d = (const uint8_t*)data;
	for (size_t i = 0; i < len; i++) {
	std::cerr << std::hex << std::setfill('0') << std::setw(2) << (uint32_t)d[i] << " ";
	if (i % 8 == 7) {
	std::cerr << "\n";
	}
	}

	if (len - 1 % 8 != 7) {
	std::cerr << std::endl;
	}
	}

	namespace {

	class XmlPrinter : public xml::ConstVisitor {
	public:
	using xml::ConstVisitor::Visit;

	void Visit(const xml::Element* el) override {
	const size_t previous_size = prefix_.size();

	for (const xml::NamespaceDecl& decl : el->namespace_decls) {
	std::cerr << prefix_ << "N: " << decl.prefix << "=" << decl.uri
	<< " (line=" << decl.line_number << ")\n";
	prefix_ += " ";
	}

	std::cerr << prefix_ << "E: ";
	if (!el->namespace_uri.empty()) {
	std::cerr << el->namespace_uri << ":";
	}
	std::cerr << el->name << " (line=" << el->line_number << ")\n";

	for (const xml::Attribute& attr : el->attributes) {
	std::cerr << prefix_ << " A: ";
	if (!attr.namespace_uri.empty()) {
	std::cerr << attr.namespace_uri << ":";
	}
	std::cerr << attr.name;

	if (attr.compiled_attribute) {
	std::cerr << "(" << attr.compiled_attribute.value().id.value_or_default(ResourceId(0x0))
	<< ")";
	}
	std::cerr << "=";
	if (attr.compiled_value != nullptr) {
	std::cerr << *attr.compiled_value;
	} else {
	std::cerr << attr.value;
	}
	std::cerr << "\n";
	}

	prefix_ += " ";
	xml::ConstVisitor::Visit(el);
	prefix_.resize(previous_size);
	}

	void Visit(const xml::Text* text) override {
	std::cerr << prefix_ << "T: '" << text->text << "'\n";
	}

	private:
	std::string prefix_;
	};

	} // namespace

	void Debug::DumpXml(const xml::XmlResource& doc) {
	XmlPrinter printer;
	doc.root->Accept(&printer);
	}

	} // namespace aapt