Reimplemented the code that backed the "settings" in lldb. There were many issues with the previous implementation:
- no setting auto completion
- very manual and error prone way of getting/setting variables
- tons of code duplication
- useless instance names for processes, threads

Now settings can easily be defined like option values. The new settings makes use of the "OptionValue" classes so we can re-use the option value code that we use to set settings in command options. No more instances, just "does the right thing".



git-svn-id: https://llvm.org/svn/llvm-project/lldb/trunk@162366 91177308-0d34-0410-b5e6-96231b3b80d8
diff --git a/source/Interpreter/OptionValueFileSpec.cpp b/source/Interpreter/OptionValueFileSpec.cpp
new file mode 100644
index 0000000..20b0b04
--- /dev/null
+++ b/source/Interpreter/OptionValueFileSpec.cpp
@@ -0,0 +1,116 @@
+//===-- OptionValueFileSpec.cpp ---------------------------------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "lldb/Interpreter/OptionValueFileSpec.h"
+
+// C Includes
+// C++ Includes
+// Other libraries and framework includes
+// Project includes
+#include "lldb/Core/FormatManager.h"
+#include "lldb/Core/State.h"
+#include "lldb/Interpreter/Args.h"
+#include "lldb/Interpreter/CommandCompletions.h"
+
+using namespace lldb;
+using namespace lldb_private;
+
+void
+OptionValueFileSpec::DumpValue (const ExecutionContext *exe_ctx, Stream &strm, uint32_t dump_mask)
+{
+    if (dump_mask & eDumpOptionType)
+        strm.Printf ("(%s)", GetTypeAsCString ());
+    if (dump_mask & eDumpOptionValue)
+    {
+        if (dump_mask & eDumpOptionType)
+            strm.PutCString (" = ");
+
+        if (m_current_value)
+        {
+            if (m_current_value.GetDirectory())
+            {
+                strm << '"' << m_current_value.GetDirectory();
+                if (m_current_value.GetFilename())
+                    strm << '/' << m_current_value.GetFilename();
+                strm << '"';
+            }
+            else
+            {
+                strm << '"' << m_current_value.GetFilename() << '"';
+            }
+        }
+    }
+}
+
+Error
+OptionValueFileSpec::SetValueFromCString (const char *value_cstr,
+                                          VarSetOperationType op)
+{
+    Error error;
+    switch (op)
+    {
+    case eVarSetOperationClear:
+        Clear ();
+        break;
+        
+    case eVarSetOperationReplace:
+    case eVarSetOperationAssign:
+        if (value_cstr && value_cstr[0])
+        {
+            m_value_was_set = true;
+            m_current_value.SetFile(value_cstr, false);
+        }
+        else
+        {
+            error.SetErrorString("invalid value string");
+        }
+        break;
+        
+    case eVarSetOperationInsertBefore:
+    case eVarSetOperationInsertAfter:
+    case eVarSetOperationRemove:
+    case eVarSetOperationAppend:
+    case eVarSetOperationInvalid:
+        error = OptionValue::SetValueFromCString (value_cstr, op);
+        break;
+    }
+    return error;
+}
+
+lldb::OptionValueSP
+OptionValueFileSpec::DeepCopy () const
+{
+    return OptionValueSP(new OptionValueFileSpec(*this));
+}
+
+
+size_t
+OptionValueFileSpec::AutoComplete (CommandInterpreter &interpreter,
+                                   const char *s,
+                                   int match_start_point,
+                                   int max_return_elements,
+                                   bool &word_complete,
+                                   StringList &matches)
+{
+    word_complete = false;
+    matches.Clear();
+    CommandCompletions::InvokeCommonCompletionCallbacks (interpreter,
+                                                         CommandCompletions::eDiskFileCompletion,
+                                                         s,
+                                                         match_start_point,
+                                                         max_return_elements,
+                                                         NULL,
+                                                         word_complete,
+                                                         matches);
+    return matches.GetSize();
+}
+
+
+
+