add command echo functionality for mini shell

libopenfpga/libminishell/src/command_echo.cpp

@@ -0,0 +1,53 @@
+/*********************************************************************
+ * This file includes functions that output the content of
+ * object Command and CommandContext
+ ********************************************************************/
+#include "vtr_assert.h"
+#include "vtr_log.h"
+#include "command_echo.h"
+
+/* Begin namespace minishell */
+namespace minishell {
+
+/*********************************************************************
+ * Print all the options that are defined in an object Command
+ * This function is mainly used to create help desk for a command
+ ********************************************************************/
+void print_command_options(const Command& cmd) {
+  VTR_LOG("Command '%s' usage:",
+          cmd.name().c_str());
+  for (const CommandOptionId& opt : cmd.options()) {
+    VTR_LOG("%s, %s : %s",
+            cmd.option_name(opt).c_str(),
+            cmd.option_short_name(opt).c_str(),
+            cmd.option_description(opt));
+  } 
+}
+
+/*********************************************************************
+ * Print all the options that have been parsed to an object of CommandContext
+ * This function is mainly used to validate what options have been enabled
+ * for users' confirmation
+ ********************************************************************/
+void print_command_context(const Command& cmd, 
+                           const CommandContext& cmd_context) {
+  VTR_LOG("Confirm selected options when call command '%s':",
+          cmd.name().c_str());
+  for (const CommandOptionId& opt : cmd.options()) {
+    if (false == cmd.option_require_value(opt)) {
+      VTR_LOG("%s, %s : %s",
+              cmd.option_name(opt).c_str(),
+              cmd.option_short_name(opt).c_str(),
+              cmd_context.option_enable(cmd, opt) ? "on" : "off");
+    } else {
+      VTR_ASSERT_SAFE (true == cmd.option_require_value(opt));
+      VTR_LOG("%s, %s : %s",
+              cmd.option_name(opt).c_str(),
+              cmd.option_short_name(opt).c_str(),
+              cmd_context.option_value(cmd, opt).c_str());
+    }
+  } 
+}
+
+
+} /* End namespace minshell */

libopenfpga/libminishell/src/command_echo.h

@@ -0,0 +1,24 @@
+#ifndef COMMAND_ECHO_H
+#define COMMAND_ECHO_H
+
+/********************************************************************
+ * Include header files that are required by function declaration
+ *******************************************************************/
+#include "command.h"
+#include "command_context.h"
+
+/********************************************************************
+ * Function declaration
+ *******************************************************************/
+
+/* Begin namespace minishell */
+namespace minishell {
+
+void print_command_options(const Command& cmd);
+
+void print_command_context(const Command& cmd, 
+                           const CommandContext& cmd_context);
+
+} /* End namespace minshell */
+
+#endif

libopenfpga/libminishell/src/command_parser.h

@@ -1,10 +1,17 @@
 #ifndef COMMAND_PARSER_H
 #define COMMAND_PARSER_H
 
+/********************************************************************
+ * Include header files that are required by function declaration
+ *******************************************************************/
 #include <string>
 #include "command.h"
 #include "command_context.h"
 
+/********************************************************************
+ * Function declaration
+ *******************************************************************/
+
 /* Begin namespace minishell */
 namespace minishell {