File content as of revision 16:f2b9b7b2c71e:

#ifndef __SIMPLESHELL_H
#define __SIMPLESHELL_H

#include "mbed.h"

/** SimpleShell
 * A simple, flexible, embedded shell with dynamically added shell commands.
 * Shell commands must be void().
 * @code 
 * #include "SimpleShell.h"
 *
 * void helloworld() { printf("Hello world!\n"); }
 *
 * int main() {
 *   SimpleShell sh;
 *   sh.attach(helloworld, "test");
 *   sh.run();
 * }
 * @endcode
 */
class SimpleShell {
public:  

    /// Callback type used for shell commands
    typedef Callback<void(int, char**)> callback_t;

    /// Create a new shell instance
    SimpleShell();

    /** Call this to run the shell.
     * @note The shell can be run in a new thread.
     * @code 
     * SimpleShell sh;
     * sh.run();
     * thread.start(callback(&sh, &SimpleShell::run));
     * @endcode
     */
    void run();

    /** Attaches a shell command
     * @param cb is the callback function that implements the command
     * @param command is the string used to invoke the command in the shell
     * @code
     * sh.attach(helloworld, "test");
     * @endcode
     */
    void attach(callback_t cb, char *command);

    
private:
    /// Maximum number of commands
    static const int MAXLOOKUP=32;

    /// Maximum command line buffer size
    static const int MAXBUF=64;

    /// internal struct to contain a single command
    typedef struct {
        char *command;
        callback_t cb;
    } command_entry_t;

    /** finds and eturns the callback for a command
     * @return Callback to a function returning void
     */
    callback_t findCommand();  
    
    /// Built-in shell command to display list of commands
    void help(int argc, char **argv);

    /// Built-in shell command to print working directory
    void pwd(int argc, char **argv);

    /// Built-in shell command to display contents of file
    void cat(int argc, char **argv);

    /// Prints command prompt
    void printPrompt(void);
    
    /// Reads a command from the prompt (with editing)
    void readCommand();
    
    /// Command lookup table
    command_entry_t lookup[MAXLOOKUP];

    /// Current end of lookup table
    int lookupEnd;
    
    /// Maximum number of arguments
    static const int MAXARGS=3;
    
    /// Command and arguments
    char *argv[MAXARGS];
        
    /// Size of argv
    int argc;
    
    /// Current working directory
    char _cwd[MAXBUF];
    
    /// shell command history
    
    
}; // class

#endif