/*
Copyright (C) Magna Carta Software, Inc. 1990, 1991. All Rights Reserved.
CCT09.C: CCT08 plus...
1) File transmission with error correction using any of:
    XMODEM checksum, XMODEM-CRC, XMODEM-1K, YMODEM, YMODEM-g, ZMODEM;
*/

#include <comm.h>
#include <xfer.h>
#include <modem.h>

#include <conio.h>
#include <dos.h>
#include <stdlib.h>
#include <string.h>


/* MANIFEST CONSTANTS AND MACROS */
#define DO_MENU           ALT_M       /* key for command summary */


/* FUNCTION PROTOTYPES */
void    do_data_menu(COMM_PORT * p);
short   do_txfile_menu(COMM_PORT *p);
short   do_modem_menu(COMM_PORT *p);
long    do_speed_menu(COMM_PORT * p);
short   menu(COMM_PORT *p);
void    term(COMM_PORT *p);
short   xfer_progress(COMM_PORT *p, short status, unsigned long parm);


/* GLOBAL VARIABLES */
int     vers = 9;
BYTE    rxbuf[2048];                    /* RECEIVE BUFFER */
char    phone_number[] = "226-8088";    /* MAGNA CARTA BBS (change if needed) */


COMM_PORT port1;
MODEM m1;
XFER x;             /* MUST be initialized to 0 */


#include "menus.c"
#include "xfermsg.c"


/* ------------------------ PROGRAM BEGINS HERE --------------------------- */
int main(void)
{
    u8250_init(&port1, COM1, 19200L, DATABITS8, PARITY_NONE, STOPBITS1);
    install_ipr(&port1, RECEIVE, NULL, rxbuf, sizeof(rxbuf));
    install_isr(&port1, 4, NULL);

    printf("\nCCT-COMM Version %d: Press Alt-M for a list of commands\n", vers);
    term(&port1);
    printf("\nEnd of CCT-COMM%d\n", vers);

    return (0);
}



/*
TERM -- The terminal emulation routine. Simply polls the COM port and the
keyboard alternately for characters.
*/
void term(COMM_PORT *p)
{
    short c;              /* must be int to detect a -1 return */

    set_rx_xlat(p, EOL, FALSE);
    set_rx_xlat(p, LOCAL_ECHO, TRUE);

    for (;;) {
        /* CHECK SERIAL PORT FOR BYTE */
        c = c_getc(p);

        /* CHECK KEYBOARD FOR A KEY PRESS */
        if ((c = inkey()) != 0) {
            if (c == DO_MENU) {
                if (menu(p) == 1) break;
            }
            else c_putc(p, c);
        }
    }
}


#define DATA_FORMAT 'D'                 /* key to set speed */
#define DATA_SPEED  'S'                 /* key to set speed */
#define MODEM_MENU  'M'                 /* key to send modem commands */
#define FILE_MENU   'F'                 /* key to transfer files */
#define EXIT        'Q'                 /* key to exit from main */


short menu(COMM_PORT *p)
{
    short c, retval = 0, DONE = FALSE;
    static char *menus[] = {
        "\tD.  Data Format",
        "\tF.  File Send Commands.",
        "\tM.  Modem Commands.",
        "\tS.  Data Transfer Rate.",
        "\tQ.  EXIT from COMM.",
        NULL                        /* null string terminates list */
    };
    char **p_menu;

    c = !EXIT;
    while (!DONE) {
        puts("\n\n");
        for (p_menu = menus; *p_menu != NULL; p_menu++) printf("%s\n", *p_menu);
        printf("\n\t\t Enter selection (CR to quit menu) :  ");
        c = getchar();
        c = toupper(c);
        switch (c) {
            case EXIT:
                retval = 1;
                DONE = TRUE;
                break;

            case DATA_FORMAT:
                do_data_menu(p);
                break;

            case DATA_SPEED:
                do_speed_menu(p);
                break;

            case MODEM_MENU:
                DONE = do_modem_menu(p);
                break;

            case FILE_MENU:
                DONE = do_txfile_menu(p);
                break;

            default:
                DONE = TRUE;
                break;
        }
    }
    puts("\nExiting menu");

    set_tx_xlat(p, LOCAL_ECHO, FALSE);

    return (retval);                /* will be zero except if EXIT */
}



/*
DO_MODEM_MENU -- Send commands to the modem.
*/
short do_modem_menu(COMM_PORT *p)
{
    short key;
    short DONE=FALSE, ret = 0;

    do {
        puts("\nSEND COMMANDS TO THE MODEM");
        puts("\nD. Dial");
        puts("H. Hangup");
        puts("I. Initialize");
        puts("O. Go Offline");
        puts("R. Reset\n");
        puts("\nAny other key exits");
        key = bios_key(0) & 0XFF;
        key = toupper(key);
        switch (key) {
            case 'D':
                modem_dial(p, phone_number);
                ret = 1;
                DONE = TRUE;
                break;

            case 'H':
                modem_hangup(p);
                break;

            case 'I':
                modem_init(p, modem_type(p));
                set_dtr(p, HIGH);
                break;

            case 'O':
                modem_go_cmd(p, (short) atoi(&((MODEM *)p->modem)->escape[3]));
                break;

            case 'R':
                modem_reset(p);
                break;

            default:
                DONE = TRUE;
                break;
        }
    } while (!DONE);

    return (ret);
}



/*
DO_SENDFILE_MENU -- Send a file to a remote system using XMODEM checksum.
*/
short do_txfile_menu(COMM_PORT *p)
{
    short ret = 0, protocol = XMODEM_1K;
    short ch;
    char filename[80], sxlat[XLAT_SIZE];

    /* GET THE FILE NAME FROM THE USER */
    filename[0] = '\0';
    puts("\nSEND A FILE TO A REMOTE SYSTEM USING THE XMODEM PROTOCOL");
    puts("\nEnter file name (ENTER to exit):");
    scanf("%s", filename);
    if (filename[0] == CR) return (0);
    puts("\nEnter 'Y' for YMODEM, 'G' for YMODEM-g, 'X' for XMODEM, '1'for XMODEM_1K\n"
        "'Z' for ZMODEM");
    ch = getche();
    ch = toupper(ch);
    if (ch == 'Y') protocol = YMODEM;
    else if (ch == 'X') protocol = XMODEM;
    else if (ch == 'G') protocol = YMODEM_G;
    else if (ch == 'Z') protocol = ZMODEM;

    /* IF WE ARE USING YMODEM-g, CCT WILL INSTALL RECEIVE XON-XOFF FLOW
    CONTROL IF WE DO NOT INSTALL ANY FLOW CONTROL.
    */
    ret = fqueue(&x, filename);
/*  ret = fqueue(&x, "example.exe"); */
    if (ret) {
        puts("\nUnable to queue file.");
        return (EOF);
    }
    puts("\nStarting...");
    save_xlat(p, sxlat);
    set_rx_xlat(p, LOCAL_ECHO, OFF);        /* Don't echo RX bytes */
    ret = fsend(p, &x, protocol, 4*1024, xfer_progress);  /* send the file */
    restore_xlat(p, sxlat);

    return (ret);
}