Added type/value handlers for C strings. This allow's the debugger's

variable view to actually render their contents rather than simply giving
the string's address.



git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@39367 a95241bf-73f2-0310-859d-f6bbb57e9c96

src/apps/debugger/Jamfile

@@ -27,6 +27,7 @@ SEARCH_SOURCE += [ FDirName $(SUBDIR) user_interface gui util ] ;
 SEARCH_SOURCE += [ FDirName $(SUBDIR) user_interface gui value ] ;
 SEARCH_SOURCE += [ FDirName $(SUBDIR) util ] ;
 SEARCH_SOURCE += [ FDirName $(SUBDIR) value ] ;
+SEARCH_SOURCE += [ FDirName $(SUBDIR) value type_handlers ] ;
 SEARCH_SOURCE += [ FDirName $(SUBDIR) value value_handlers ] ;
 SEARCH_SOURCE += [ FDirName $(SUBDIR) value value_nodes ] ;
 SEARCH_SOURCE += [ FDirName $(SUBDIR) value values ] ;
@@ -210,17 +211,22 @@ Application Debugger :
 	ValueNode.cpp
 	ValueNodeContainer.cpp
 
+	# value/type_handlers
+	CStringTypeHandler.cpp
+
 	# value/value_handlers
 	AddressValueHandler.cpp
 	BoolValueHandler.cpp
 	EnumerationValueHandler.cpp
 	FloatValueHandler.cpp
 	IntegerValueHandler.cpp
+	StringValueHandler.cpp
 
 	# value/value_nodes
 	AddressValueNode.cpp
 	ArrayValueNode.cpp
 	CompoundValueNode.cpp
+	CStringValueNode.cpp
 	EnumerationValueNode.cpp
 	PointerToMemberValueNode.cpp
 	PrimitiveValueNode.cpp
@@ -232,6 +238,7 @@ Application Debugger :
 	EnumerationValue.cpp
 	FloatValue.cpp
 	IntegerValue.cpp
+	StringValue.cpp
 
 	:
 	<nogrist>Debugger_demangler.o

src/apps/debugger/user_interface/gui/value/TableCellStringRenderer.cpp

@@ -6,6 +6,8 @@
 
 #include "TableCellStringRenderer.h"
 
+#include <stdio.h>
+
 #include <String.h>
 
 #include "TableCellValueRendererUtils.h"
@@ -16,9 +18,50 @@ void
 TableCellStringRenderer::RenderValue(Value* value, BRect rect,
 	BView* targetView)
 {
-	BString string;
-	if (!value->ToString(string))
+	BString string = "\"";
+	BString tempString;
+	if (!value->ToString(tempString))
 		return;
+	for (int32 i = 0; i < tempString.Length(); i++) {
+		if (tempString[i] < 31) {
+			switch (tempString[i]) {
+				case '\0':
+					string << "\\0";
+					break;
+				case '\a':
+					string << "\\a";
+					break;
+				case '\b':
+					string << "\\b";
+					break;
+				case '\t':
+					string << "\\t";
+					break;
+				case '\r':
+					string << "\\r";
+					break;
+				case '\n':
+					string << "\\n";
+					break;
+				case '\f':
+					string << "\\f";
+					break;
+				default:
+				{
+					char buffer[5];
+					snprintf(buffer, sizeof(buffer), "\\x%x",
+						tempString.String()[i]);
+					string << buffer;
+					break;
+				}
+			}
+		} else if (tempString[i] == '\"')
+			string << "\\\"";
+		else
+			string << tempString[i];
+	}
+
+	string += "\"";
 
 	TableCellValueRendererUtils::DrawString(targetView, rect, string,
 		B_ALIGN_LEFT, true);

src/apps/debugger/value/TypeHandlerRoster.cpp

@@ -14,6 +14,7 @@
 #include "AddressValueNode.h"
 #include "ArrayValueNode.h"
 #include "CompoundValueNode.h"
+#include "CStringTypeHandler.h"
 #include "EnumerationValueNode.h"
 #include "PointerToMemberValueNode.h"
 #include "PrimitiveValueNode.h"
@@ -140,6 +141,11 @@ TypeHandlerRoster::RegisterDefaultHandlers()
 	REGISTER_HANDLER(PointerToMember);
 	REGISTER_HANDLER(Primitive);
 
+	handler = new(std::nothrow) CStringTypeHandler();
+	handlerReference.SetTo(handler, true);
+	if (handler == NULL || !RegisterHandler(handler))
+		return B_NO_MEMORY;
+
 	return B_OK;
 }
 

src/apps/debugger/value/ValueHandlerRoster.cpp

@@ -15,6 +15,7 @@
 #include "BoolValueHandler.h"
 #include "EnumerationValueHandler.h"
 #include "FloatValueHandler.h"
+#include "StringValueHandler.h"
 #include "Value.h"
 
 
@@ -106,6 +107,7 @@ ValueHandlerRoster::RegisterDefaultHandlers()
 	REGISTER_HANDLER(Enumeration)
 	REGISTER_HANDLER(Float)
 	REGISTER_HANDLER(Integer)
+	REGISTER_HANDLER(String)
 
 	return B_OK;
 }

src/apps/debugger/value/ValueLoader.cpp

@@ -185,3 +185,14 @@ ValueLoader::LoadValue(ValueLocation* location, type_code valueType,
 	_value = value;
 	return B_OK;
 }
+
+
+status_t
+ValueLoader::LoadStringValue(BVariant& location, type_code valueType,
+	BString& _value)
+{
+	static const size_t kMaxStringSize = 255;
+
+	return fTeamMemory->ReadMemoryString(location.ToUInt64(), kMaxStringSize,
+		_value);
+}

src/apps/debugger/value/ValueLoader.h

@@ -31,6 +31,10 @@ public:
 									type_code valueType, bool shortValueIsFine,
 									BVariant& _value);
 
+			status_t			LoadStringValue(BVariant& location,
+									type_code valueType,
+									BString& _value);
+
 private:
 			Architecture*		fArchitecture;
 			TeamMemory*			fTeamMemory;

src/apps/debugger/value/type_handlers/CStringTypeHandler.cpp

@@ -0,0 +1,70 @@
+/*
+ * Copyright 2010, Rene Gollent, rene@gollent.com
+ * Distributed under the terms of the MIT License.
+ */
+
+
+#include "CStringTypeHandler.h"
+
+#include <new>
+
+#include <stdio.h>
+
+#include "CStringValueNode.h"
+#include "Type.h"
+
+
+CStringTypeHandler::~CStringTypeHandler()
+{
+}
+
+
+float
+CStringTypeHandler::SupportsType(Type* type)
+{
+	AddressType* addressType = dynamic_cast<AddressType*>(type);
+	if (addressType != NULL && addressType->AddressKind()
+			== DERIVED_TYPE_POINTER) {
+		PrimitiveType* baseType = dynamic_cast<PrimitiveType*>(
+			addressType->BaseType());
+
+		if (baseType == NULL) {
+			ModifiedType* modifiedType = dynamic_cast<ModifiedType*>(
+			addressType->BaseType());
+			if (modifiedType == NULL)
+				return 0.0f;
+
+			baseType = dynamic_cast<PrimitiveType*>(
+				modifiedType->ResolveRawType(false));
+			if (baseType == NULL)
+				return 0.0f;
+		}
+
+		if (baseType->TypeConstant() == B_UINT8_TYPE
+			|| baseType->TypeConstant() == B_INT8_TYPE)
+			return 0.8f;
+	}
+
+	return 0.0f;
+}
+
+
+status_t
+CStringTypeHandler::CreateValueNode(ValueNodeChild* nodeChild, Type* type,
+	ValueNode*& _node)
+{
+	if (SupportsType(type) == 0.0f)
+		return B_BAD_VALUE;
+
+	AddressType* supportedType = dynamic_cast<AddressType*>(type);
+
+	ValueNode* node = new(std::nothrow) CStringValueNode(nodeChild,
+		supportedType);
+
+	if (node == NULL)
+		return B_NO_MEMORY;
+
+	_node = node;
+
+	return B_OK;
+}

src/apps/debugger/value/type_handlers/CStringTypeHandler.h

@@ -0,0 +1,21 @@
+/*
+ * Copyright 2010, Rene Gollent, rene@gollent.com
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef CSTRING_TYPE_HANDLER_H
+#define CSTRING_TYPE_HANDLER_H
+
+
+#include "TypeHandler.h"
+
+
+class CStringTypeHandler : public TypeHandler {
+public:
+	virtual					~CStringTypeHandler();
+
+	virtual float			SupportsType(Type* type);
+	virtual status_t		CreateValueNode(ValueNodeChild* nodeChild,
+								Type* type, ValueNode*& _node);
+};
+
+#endif // CSTRING_TYPE_HANDLER_H

src/apps/debugger/value/value_handlers/StringValueHandler.cpp

@@ -0,0 +1,65 @@
+/*
+ * Copyright 2010, Rene Gollent, rene@gollent.com
+ * Distributed under the terms of the MIT License.
+ */
+
+
+#include "StringValueHandler.h"
+
+#include <new>
+
+#include <stdio.h>
+
+#include "StringValue.h"
+#include "TableCellStringRenderer.h"
+
+
+StringValueHandler::StringValueHandler()
+{
+}
+
+
+StringValueHandler::~StringValueHandler()
+{
+}
+
+
+status_t
+StringValueHandler::Init()
+{
+	return B_OK;
+}
+
+
+float
+StringValueHandler::SupportsValue(Value* value)
+{
+	return dynamic_cast<StringValue*>(value) != NULL ? 0.8f : 0;
+}
+
+
+status_t
+StringValueHandler::GetValueFormatter(Value* value,
+	ValueFormatter*& _formatter)
+{
+	// TODO:...
+	return B_UNSUPPORTED;
+}
+
+
+status_t
+StringValueHandler::GetTableCellValueRenderer(Value* value,
+	TableCellValueRenderer*& _renderer)
+{
+	if (dynamic_cast<StringValue*>(value) == NULL)
+		return B_BAD_VALUE;
+
+	// create the renderer
+	TableCellValueRenderer* renderer = new(std::nothrow)
+		TableCellStringRenderer;
+	if (renderer == NULL)
+		return B_NO_MEMORY;
+
+	_renderer = renderer;
+	return B_OK;
+}

src/apps/debugger/value/value_handlers/StringValueHandler.h

@@ -0,0 +1,27 @@
+/*
+ * Copyright 2010, Rene Gollent, rene@gollent.com.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef STRING_VALUE_HANDLER_H
+#define STRING_VALUE_HANDLER_H
+
+
+#include "ValueHandler.h"
+
+
+class StringValueHandler : public ValueHandler {
+public:
+								StringValueHandler();
+								~StringValueHandler();
+
+			status_t			Init();
+
+	virtual	float				SupportsValue(Value* value);
+	virtual	status_t			GetValueFormatter(Value* value,
+									ValueFormatter*& _formatter);
+	virtual	status_t			GetTableCellValueRenderer(Value* value,
+									TableCellValueRenderer*& _renderer);
+};
+
+
+#endif	// STRING_VALUE_HANDLER_H

src/apps/debugger/value/value_nodes/CStringValueNode.cpp

@@ -0,0 +1,90 @@
+/*
+ * Copyright 2010, Rene Gollent, rene@gollent.com
+ * Distributed under the terms of the MIT License.
+ */
+
+
+#include "CStringValueNode.h"
+
+#include <new>
+
+#include "Architecture.h"
+#include "StringValue.h"
+#include "Tracing.h"
+#include "Type.h"
+#include "ValueLoader.h"
+#include "ValueLocation.h"
+#include "ValueNodeContainer.h"
+
+
+// #pragma mark - CStringValueNode
+
+
+CStringValueNode::CStringValueNode(ValueNodeChild* nodeChild,
+	AddressType* type)
+	:
+	ChildlessValueNode(nodeChild),
+	fType(type)
+{
+	fType->AcquireReference();
+}
+
+
+CStringValueNode::~CStringValueNode()
+{
+	fType->ReleaseReference();
+}
+
+
+Type*
+CStringValueNode::GetType() const
+{
+	return fType;
+}
+
+
+status_t
+CStringValueNode::ResolvedLocationAndValue(ValueLoader* valueLoader,
+	ValueLocation*& _location, Value*& _value)
+{
+	// get the location
+	ValueLocation* location = NodeChild()->Location();
+	if (location == NULL)
+		return B_BAD_VALUE;
+
+	TRACE_LOCALS("  TYPE_ADDRESS (C string)\n");
+
+	// get the value type
+	type_code valueType;
+	if (valueLoader->GetArchitecture()->AddressSize() == 4) {
+		valueType = B_UINT32_TYPE;
+		TRACE_LOCALS("    -> 32 bit\n");
+	} else {
+		valueType = B_UINT64_TYPE;
+		TRACE_LOCALS("    -> 64 bit\n");
+	}
+
+	// load the value data
+
+	BVariant addressData;
+	BString valueData;
+	status_t error = valueLoader->LoadValue(location, valueType, false,
+		addressData);
+	if (error != B_OK)
+		return error;
+
+	error = valueLoader->LoadStringValue(addressData, valueType,
+		valueData);
+	if (error != B_OK)
+		return error;
+
+	// create the type object
+	Value* value = new(std::nothrow) StringValue(valueData);
+	if (value == NULL)
+		return B_NO_MEMORY;
+
+	location->AcquireReference();
+	_location = location;
+	_value = value;
+	return B_OK;
+}

src/apps/debugger/value/value_nodes/CStringValueNode.h

@@ -0,0 +1,32 @@
+/*
+ * Copyright 2010, Rene Gollent, rene@gollent.com.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef CSTRING_VALUE_NODE_H
+#define CSTRING_VALUE_NODE_H
+
+
+#include "ValueNode.h"
+
+
+class AddressType;
+
+
+class CStringValueNode : public ChildlessValueNode {
+public:
+								CStringValueNode(ValueNodeChild* nodeChild,
+									AddressType* type);
+	virtual						~CStringValueNode();
+
+	virtual	Type*				GetType() const;
+
+	virtual	status_t			ResolvedLocationAndValue(
+									ValueLoader* valueLoader,
+									ValueLocation*& _location,
+									Value*& _value);
+
+private:
+			AddressType*		fType;
+};
+
+#endif	// CSTRING_VALUE_NODE_H

src/apps/debugger/value/values/StringValue.cpp

@@ -0,0 +1,45 @@
+/*
+ * Copyright 2010, Rene Gollent, rene@gollent.com.
+ * Distributed under the terms of the MIT License.
+ */
+
+
+#include "StringValue.h"
+
+#include <stdio.h>
+
+
+StringValue::StringValue(const char* value)
+	:
+	fValue(value)
+{
+}
+
+
+StringValue::~StringValue()
+{
+}
+
+
+bool
+StringValue::ToString(BString& _string) const
+{
+	_string = fValue;
+	return true;
+}
+
+
+bool
+StringValue::ToVariant(BVariant& _value) const
+{
+	_value = fValue.String();
+	return true;
+}
+
+
+bool
+StringValue::operator==(const Value& other) const
+{
+	const StringValue* otherString = dynamic_cast<const StringValue*>(&other);
+	return otherString != NULL ? fValue == otherString->fValue : false;
+}

src/apps/debugger/value/values/StringValue.h

@@ -0,0 +1,30 @@
+/*
+ * Copyright 2010, Rene Gollent, rene@gollent.com.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef STRING_VALUE_H
+#define STRING_VALUE_H
+
+
+#include "Value.h"
+
+
+class StringValue : public Value {
+public:
+								StringValue(const char* value);
+	virtual						~StringValue();
+
+			BString				GetValue() const
+									{ return fValue; }
+
+	virtual	bool				ToString(BString& _string) const;
+	virtual	bool				ToVariant(BVariant& _value) const;
+
+	virtual	bool				operator==(const Value& other) const;
+
+private:
+			BString				fValue;
+};
+
+
+#endif	// STRING_VALUE_H