[LLDB][GUI] Add Arch Field

[OmarEmaraDev]

Summary

This patch adds an Arch field that inputs and validates an arch spec.

lldb/source/Core/IOHandlerCursesGUI.cpp

 //===-- IOHandlerCursesGUI.cpp --------------------------------------------===//
 //
 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
 // See https://llvm.org/LICENSE.txt for license information.
 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
 //
 //===----------------------------------------------------------------------===//
 
 #include "lldb/Core/IOHandlerCursesGUI.h"
 #include "lldb/Host/Config.h"
 
 #if LLDB_ENABLE_CURSES
 #if CURSES_HAVE_NCURSES_CURSES_H
 #include <ncurses/curses.h>
 #include <ncurses/panel.h>
 #else
 #include <curses.h>
public:
 
   // Returns the path of the file.
   const std::string &GetPath() { return m_content; }
 
 protected:
   bool m_need_to_exist;
 };
 
+class ArchFieldDelegate : public TextFieldDelegate {
+public:
+  ArchFieldDelegate(const char *label, const char *content, bool required)
+      : TextFieldDelegate(label, content, required) {}
+
+  void FieldDelegateExitCallback() override {
+    TextFieldDelegate::FieldDelegateExitCallback();
+    if (!IsSpecified())
+      return;
+
+    if (!GetArchSpec().IsValid())
+      SetError("Not a valid arch!");
+  }
+
+  const std::string &GetArchString() { return m_content; }
+
+  ArchSpec GetArchSpec() { return ArchSpec(GetArchString()); }
+};
+
 class BooleanFieldDelegate : public FieldDelegate {
 public:
   BooleanFieldDelegate(const char *label, bool content)
       : m_label(label), m_content(content) {}
 
   // Boolean fields are drawn as checkboxes.
   //
   // [X] Label  or [ ] Label
DirectoryFieldDelegate *AddDirectoryField(const char *label,
                                             const char *content,
                                             bool need_to_exist, bool required) {
     DirectoryFieldDelegate *delegate =
         new DirectoryFieldDelegate(label, content, need_to_exist, required);
     m_fields.push_back(FieldDelegateUP(delegate));
     return delegate;
   }
 
+  ArchFieldDelegate *AddArchField(const char *label, const char *content,
+                                  bool required) {
+    ArchFieldDelegate *delegate =
+        new ArchFieldDelegate(label, content, required);
+    m_fields.push_back(FieldDelegateUP(delegate));
+    return delegate;
+  }
+
   IntegerFieldDelegate *AddIntegerField(const char *label, int content,
                                         bool required) {
     IntegerFieldDelegate *delegate =
         new IntegerFieldDelegate(label, content, required);
     m_fields.push_back(FieldDelegateUP(delegate));
     return delegate;
   }