shellpp.hpp

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/* -*- mode: c++; c-basic-offset: 4; -*- */
#ifndef __shellpp__
#define __shellpp__

#include <stdbool.h>

#include "uartpp.hpp"
#include "bufferpp.hpp"
#include "semaphorepp.hpp"

#define SHELL_COMMANDS 2

#define SYSTEM_MAX_NAME_LENGTH 10
#define SYSTEM_MAX_COMMANDS    5

#define SHELL_MAX_PS1_LENGTH 4

#define SHELL_BUFFER_LENGTH 32

#define UART_VERBOSE true

typedef uint8_t exit_status_t;
typedef exit_status_t (*sys_cmd)(const char*);

class shell {
private:
    uart* uart0;
    buffer<char, SHELL_BUFFER_LENGTH> buf;
    /* Wondering why there's a +1 here? Waldo has the answers */
    char ps1[SHELL_MAX_PS1_LENGTH+1];

    int32_t ustrncmp(const char*, const char*, uint32_t);
    void* memset(void* b, int c, int len);

    uint32_t strlen(const char*);

    static exit_status_t help_info(const char* args);
    static exit_status_t doctor(const char* args);
    static exit_status_t witch(const char* args);
    static exit_status_t jester(const char* args);

    static exit_status_t motor_start(const char* args);
    static exit_status_t motor_stop(const char* args);

    static char system_command_names[SHELL_COMMANDS][SYSTEM_MAX_NAME_LENGTH];
    static sys_cmd system_command_funcs[SHELL_COMMANDS];

    static void ustrcpy(char* dest, const char* source);

    void init_ps1(void);

    static semaphore* m_start;
    static semaphore* m_stop;

    void init(void);

public:
    shell();
    shell(uart* u);
    shell(uart* u, semaphore* m_start, semaphore* m_stop);

    void clear_buffer();

    void set_ps1(char* new_ps1);

    void print_ps1();

    bool type(char ch);

    void backspace(void);

    void accept(char ch);

    exit_status_t execute_command();
};

#endif