/*
   * (C) Copyright 2014 Google, Inc
   * Simon Glass <sjg@chromium.org>
   *
   * SPDX-License-Identifier:	GPL-2.0+
   */
  
  #ifndef __CLI_H
  #define __CLI_H
  
  /**
   * Go into the command loop
   *
   * This will return if we get a timeout waiting for a command. See
   * CONFIG_BOOT_RETRY_TIME.
   */

  void cli_simple_loop(void);

  
  /**
   * cli_simple_run_command() - Execute a command with the simple CLI
   *
   * @cmd:	String containing the command to execute
   * @flag	Flag value - see CMD_FLAG_...
   * @return 1  - command executed, repeatable
   *	0  - command executed but not repeatable, interrupted commands are
   *	     always considered not repeatable
   *	-1 - not executed (unrecognized, bootd recursion or too many args)
   *           (If cmd is NULL or "" or longer than CONFIG_SYS_CBSIZE-1 it is
   *           considered unrecognized)
   */
  int cli_simple_run_command(const char *cmd, int flag);
  
  /**

   * cli_simple_process_macros() - Expand $() and ${} format env. variables
   *
   * @param input		Input string possible containing $() / ${} vars
   * @param output	Output string with $() / ${} vars expanded
   */
  void cli_simple_process_macros(const char *input, char *output);
  
  /**

   * cli_simple_run_command_list() - Execute a list of command
   *
   * The commands should be separated by ; or 
   and will be executed
   * by the built-in parser.
   *
   * This function cannot take a const char * for the command, since if it
   * finds newlines in the string, it replaces them with \0.
   *
   * @param cmd	String containing list of commands
   * @param flag	Execution flags (CMD_FLAG_...)
   * @return 0 on success, or != 0 on error.
   */
  int cli_simple_run_command_list(char *cmd, int flag);
  
  /**
   * cli_readline() - read a line into the console_buffer
   *
   * This is a convenience function which calls cli_readline_into_buffer().
   *
   * @prompt: Prompt to display
   * @return command line length excluding terminator, or -ve on error
   */

  int cli_readline(const char *const prompt);

  
  /**
   * readline_into_buffer() - read a line into a buffer
   *
   * Display the prompt, then read a command line into @buffer. The
   * maximum line length is CONFIG_SYS_CBSIZE including a \0 terminator, which
   * will always be added.
   *
   * The command is echoed as it is typed. Command editing is supported if
   * CONFIG_CMDLINE_EDITING is defined. Tab auto-complete is supported if
   * CONFIG_AUTO_COMPLETE is defined. If CONFIG_BOOT_RETRY_TIME is defined,
   * then a timeout will be applied.
   *
   * If CONFIG_BOOT_RETRY_TIME is defined and retry_time >= 0,
   * time out when time goes past endtime (timebase time in ticks).
   *
   * @prompt:	Prompt to display
   * @buffer:	Place to put the line that is entered
   * @timeout:	Timeout in milliseconds, 0 if none
   * @return command line length excluding terminator, or -ve on error: of the
   * timeout is exceeded (either CONFIG_BOOT_RETRY_TIME or the timeout
   * parameter), then -2 is returned. If a break is detected (Ctrl-C) then
   * -1 is returned.
   */

  int cli_readline_into_buffer(const char *const prompt, char *buffer,
  				int timeout);

  
  /**
   * parse_line() - split a command line down into separate arguments
   *
   * The argv[] array is filled with pointers into @line, and each argument
   * is terminated by \0 (i.e. @line is changed in the process unless there
   * is only one argument).
   *
   * #argv is terminated by a NULL after the last argument pointer.
   *
   * At most CONFIG_SYS_MAXARGS arguments are permited - if there are more
   * than that then an error is printed, and this function returns
   * CONFIG_SYS_MAXARGS, with argv[] set up to that point.
   *
   * @line:	Command line to parse
   * @args:	Array to hold arguments
   * @return number of arguments
   */

  int cli_simple_parse_line(char *line, char *argv[]);

  #if CONFIG_IS_ENABLED(OF_CONTROL)

  /**
   * cli_process_fdt() - process the boot command from the FDT
   *
   * If bootcmmd is defined in the /config node of the FDT, we use that
   * as the boot command. Further, if bootsecure is set to 1 (in the same
   * node) then we return true, indicating that the command should be executed
   * as securely as possible, avoiding the CLI parser.
   *
   * @cmdp:	On entry, the command that will be executed if the FDT does
   *		not have a command. Returns the command to execute after
   *		checking the FDT.
   * @return true to execute securely, else false
   */
  bool cli_process_fdt(const char **cmdp);
  
  /** cli_secure_boot_cmd() - execute a command as securely as possible
   *
   * This avoids using the parser, thus executing the command with the
   * smallest amount of code. Parameters are not supported.
   */
  void cli_secure_boot_cmd(const char *cmd);
  #else
  static inline bool cli_process_fdt(const char **cmdp)
  {
  	return false;
  }
  
  static inline void cli_secure_boot_cmd(const char *cmd)
  {
  }
  #endif /* CONFIG_OF_CONTROL */

  /**
   * Go into the command loop
   *
   * This will return if we get a timeout waiting for a command, but only for
   * the simple parser (not hush). See CONFIG_BOOT_RETRY_TIME.
   */
  void cli_loop(void);
  
  /** Set up the command line interpreter ready for action */
  void cli_init(void);

  #define endtick(seconds) (get_ticks() + (uint64_t)(seconds) * get_tbclk())

  #endif