Make ctrl-c terminate the current input line and start an empty line, instead of the previous content.

rdar://problem/11412821

llvm-svn: 156510

lldb/tools/driver/Driver.cpp

@@ -1081,6 +1081,8 @@ Driver::EditLineInputReaderCallback
         if (driver->m_io_channel_ap.get() != NULL)
         {
             driver->m_io_channel_ap->OutWrite ("^C\n", 3, NO_ASYNC);
+            // I wish I could erase the entire input line, but there's no public API for that.
+            driver->m_io_channel_ap->EraseCharsBeforeCursor();
             driver->m_io_channel_ap->RefreshPrompt();
         }
         break;

lldb/tools/driver/IOChannel.cpp

@@ -50,6 +50,13 @@ IOChannel::GetPrompt ()
     return pos->second.c_str();
 }
 
+void
+IOChannel::EraseCharsBeforeCursor ()
+{
+    const LineInfo *line_info  = el_line(m_edit_line);
+    el_deletestr(m_edit_line, line_info->cursor - line_info->buffer);
+}
+
 unsigned char
 IOChannel::ElCompletionFn (EditLine *e, int ch)
 {

lldb/tools/driver/IOChannel.h

@@ -96,6 +96,9 @@ public:
     const char *
     GetPrompt ();
 
+    void
+    EraseCharsBeforeCursor ();
+
     static unsigned char 
     ElCompletionFn (EditLine *e, int ch);