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/*************************************************************************

*           Copyright (C) 1995 Embedded Solutions

*                       All rights reserved

*

* file:     src\vduW32.c

*

* purpose:  This module contains all the VDU interface routines

*

*           This instance of this file implements the functions

*           in a Win32 platform.

*

*           A small number of routines are provided. These can be emulated

*           on other machines to provide similar functions

*

*           A number of general purpose I/O routines are also provided

*

* functions

*       init_screen             - Initialize the screen

*       cur                     - Position the cursor on the screen

*       clearscreen             - Clears the vdu screen

*       beep                    - Generate a bell character

*       flush_out               - Flush terminal output

*       getinp                  - Get one character of input

*       getnum                  - Get a number from the operator

*       getstring               - Get and edit a string

*       getsex                  - Get a sex type from the operator

*       getclass                - Get a class descriptor

*       getcountry              - Get a country descriptor

*       getfnc                  - Get menu selector

*       getyes                  - Prompt for YES / NO

*       to_upper                - Convert character to upper case

*       to_lower                - Convert character to lower case

*       sleep                   - Wait a bit

*       printf                  - Text display routines

*       putchar                 - Text display routines

*       console_clreol          - Clear to end of the line

*       console_prompt          - Display a hightlighted prompt

*

* programmer: David Purdie

*

* revision  date        by      reason

*   00.0    17/09/2002  DDP     Created

*

**************************************************************************/

#include    <stdio.h>

#include    <ctype.h>

#include    <windows.h>

#include    <wincon.h>

#include    "consts.h"

#include    "structs.h"

#include    "proto.h"

/* variables used by the routines */

int         n_lines;                             /* Number of lines on the screen */

int         n_cols;

int         rubout = '\010';                     /* users rubout character */

char        escape = '\033';                     /* Escape character */

int         abort_flag = FALSE;                  /* Abort character detected */

int         fnc_opr;                             /* Function key pushed */

HANDLE      h_console;                          /* Output handle */

/*

**  Prototypes

*/

int get_kb_character( void );

/*========================================================================

 *

 *  Initialize the screen

 *

 *  Purpose:

 *      This function is called to Initialize the screen

 *

 *  Parameters:

 *      None

 *

 *  Returns:

 *      Nothing

 *

 *========================================================================*/

void init_screen( void )

{

    /*

    **  Save a handle to the console

    */

    h_console = GetStdHandle(STD_OUTPUT_HANDLE);

    /*

    **  Operate within a virtual console area of 24 * 80

    **  Ignore the real console area

    */

    n_lines = 24;                                /* Fix number of lines for export */

    n_cols = 80;                                 /* Number of cols */

}

/*========================================================================

 *

 *  Restore screen to normal

 *

 *  Purpose:

 *      This function is called to Restore screen to normal

 *

 *  Parameters:

 *      None

 *

 *  Returns:

 *      Nothing

 *

 *========================================================================*/

void fix_screen( void )                          /* Restore screen to normal */

{

    flush_out();

}

/*========================================================================

 *

 *  Position the cursor on the screen

 *

 *  Purpose:

 *      This function is called to Position the cursor on the screen

 *

 *  Parameters:

 *      x               col number

 *      y               line number

 *

 *  Returns:

 *      Nothing

 *

 *========================================================================*/

void cur( int x, int y )

{

    COORD cursor;

    cursor.Y = y;

    cursor.X = x;

    SetConsoleCursorPosition ( h_console, cursor );

}

/*========================================================================

 *

 *  Position the cursor on the screen

 *

 *  Purpose:

 *      This function is called to save the current cursor location

 *      A single level save - for debug

 *

 *  Parameters:

 *      None

 *

 *  Returns:

 *      Nothing

 *

 *========================================================================*/

int save_x,save_y;

void save_cur(void)

{

    CONSOLE_SCREEN_BUFFER_INFO console_info;

    /*

    **  Determine the screen size and the current location of the

    **  cursor within the screen

    */

    GetConsoleScreenBufferInfo( h_console, &console_info );

    save_x = console_info.dwCursorPosition.X;

    save_y = console_info.dwCursorPosition.Y;

}

void restore_cur(void)

{

    cur( save_x, save_y);

}

/*========================================================================

 *

 *  Clears the vdu screen 

 *

 *  Purpose:

 *      This function is called to Clears the vdu screen

 *      From the Microsoft Web Site 

 *

 *  Parameters:

 *      None

 *

 *  Returns:

 *      Nothing

 *

 *========================================================================*/

void clearscreen( void )

{

    COORD coordScreen = { 0, 0 };        /* home for the cursor  */

    DWORD cCharsWritten;

    CONSOLE_SCREEN_BUFFER_INFO csbi;

    DWORD dwConSize;

    /*

    **   Get the number of character cells in the current buffer.

    */

    if( !GetConsoleScreenBufferInfo( h_console, &csbi ))

        return;

    dwConSize = csbi.dwSize.X * csbi.dwSize.Y;

    /*

    **   Fill the entire screen with blanks.

    */

    if( !FillConsoleOutputCharacter( h_console, (TCHAR) ' ',

                                dwConSize, coordScreen, &cCharsWritten ))

        return;

    /*

    **    Get the current text attribute.

    */

    if( !GetConsoleScreenBufferInfo( h_console, &csbi ))

        return;

    /*

    **  Set the buffer's attributes accordingly.

    */

    if( !FillConsoleOutputAttribute( h_console, csbi.wAttributes,

                                dwConSize, coordScreen, &cCharsWritten ))

        return;

    /*

    **   Put the cursor at its home coordinates.

    */

    SetConsoleCursorPosition( h_console, coordScreen );

}

/*========================================================================

 *

 *  Generate a bell character

 *

 *  Purpose:

 *      This function is called to Generate a bell character

 *

 *  Parameters:

 *      None

 *

 *  Returns:

 *      Nothing

 *

 *========================================================================*/

void beep( void )

{

    putchar( '\007' );

}

/*========================================================================

 *

 *  Flush terminal output

 *

 *  Purpose:

 *      This function is called to Flush terminal output

 *

 *  Parameters:

 *      None

 *

 *  Returns:

 *      Nothing

 *

 *========================================================================*/

void flush_out( void )

{

}

/*========================================================================

 *

 *  Get one character of input

 *

 *  Purpose:

 *      This function is called to Get one character of input

 *

 *  Parameters:

 *      None

 *

 *  Returns:

 *      Ascii code or internal control code which will be greater than

 *      a byte

 *

 *========================================================================*/

int getinp( void )

{

    /*

     * General input routine

     * Will intercept function keys and set flags

     */

    int         c;

    c = get_kb_character();

    if( c & 0xff )

    {

        c = c & 0xff;

        if( c == '\r' )

            c = '\n';

        if( c == ABORT_CHAR || c == ABORT_CHAR_1 )

        {

            abort_flag = TRUE;

            c = ABORT_CHAR;

        }

        return ( c );                            /* Input is ascii char */

    }

    c >>= 8;                                     /* Upper byte */

    if( c >= 59 && c <= 68 )

    {

        fnc_opr = FNC1 + c - 59;

        return ( 0 );

    }

    switch ( c )

    {

    case 71:    return ( HOME_KEY );

    case 72:    return ( UPARROW );

    case 75:    return ( LEFTARROW );

    case 77:    return ( RIGHTARROW );

    case 80:    return ( DOWNARROW );

    case 73:    return ( PAGE_UP );

    case 81:    return ( PAGE_DOWN );

    case 79:    return ( END_KEY );

    case 82:    return ( INSERT_KEY );

    case 83:    return ( DELETE_KEY );

    case 15:    return ( BACKTAB );

    }

    return ( 0 );

}

/*========================================================================

 *

 *  Get a number from the operator

 *

 *  Purpose:

 *      This function is called to get a number from the operator

 *      

 *      This routine will accept numeric data entry from the operator

 *      the routine will limit the operator input to a limited number

 *      of characters. This allowes fixed format input

 *      

 *  Parameters:

 *      max_len         Max field width allowed

 *      final_buf       pointer to the final resting place of the number

 *

 *  Returns:

 *      This routine will return an indication of operator input

 *          0 - No valid entry

 *          1 - data entered and transfered to number.

 *

 *========================================================================*/

bool getnum( int max_len, int *final_buf )

{

    char        n_buf[30];                       /* Convert number here */

    n_buf[0] = '\0';

    if ( *final_buf )

        sprintf( n_buf, "%*.*d", max_len,max_len, *final_buf );

    if( getstring( max_len, n_buf, Digit ) )

    {

        sscanf( n_buf, "%d", final_buf );

        return ( TRUE );

    }

    else

        return ( FALSE );

}

/*========================================================================

 *

 *  Get and edit a string

 *

 *  Purpose:

 *      This function is called to Get and edit a string

 *

 *  Parameters:

 *      len                 Max length of the string

 *      str                 Address of the string

 *      limit               Types of chars allowed

 *

 *  Returns:

 *      Length of the input string

 *

 *========================================================================*/

int getstring( int len, char *str, enum class_enum limit )

{

    char        buf[100];                        /* Internal edit buffer */

    int         i;                               /* Current index into buf */

    int         ii;                              /* Number of characters in buf */

    int         j;                               /* Loooopy variable */

    int         ch;                              /* Current input character */

    ( void ) memset( buf, 0, 100 );              /* Init the buffer */

    ( void ) strcpy( buf, str );                 /* Copy in the original string */

    ii = i = strlen( str );                      /* i is at the end of the string */

    printf( "%s", buf );                         /* Display the current string */

    /*

     * This routine assumes that the cursor is at the end of

     * the string as it is displayed on the screen

     */

    while( !abort_flag )

    {

        ch = getinp();                           /* Get the next character */

        if( ch == '\n' || ch == '\t' || fnc_opr || abort_flag )/* RETURN */

            break;                               /* Finish the edit */

        else if( ch == rubout && i )             /* Users rubout character */

        {

            i--;

            putchar( '\010' );

            for( j = i; j <= ii; j++ )

                buf[j] = buf[j + 1];

            printf( "%s ", &buf[i] );            /* Print remainder of the buffer */

            ii--;                                /* One less in the buffer */

            for( j = i; j <= ii; j++ )

                putchar( '\010' );

        }

        else if( ch == DELETE_KEY && i != ii )   /* Delete char under cursor */

        {

            for( j = i; j <= ii; j++ )

                buf[j] = buf[j + 1];

            printf( "%s ", &buf[i] );

            ii--;

            for( j = i; j <= ii; j++ )

                putchar( '\010' );

        }

        else if( ( ch == '\010' || ch == LEFTARROW ) && i ) /* Back-space */

        {

            i--;

            putchar( '\010' );

        }

        else if( ch == RIGHTARROW && i < ii )    /* forward */

            putchar( buf[i++] );

        else if( ( ii < len ) && ( ( ( limit == Alphanum  || limit == AlphnumUpper) && isprint( ch ) ) || ( ( limit == Digit ) && isascii( ch ) && isdigit( ch ) ) || ( ( limit == Alpha ) && isalpha( ch ) ) ) )    /* Insert the char */

        {

            if ( limit == AlphnumUpper )

                ch = toupper(ch);

            for( j = ii + 1; j > i; j-- )

                buf[j] = buf[j - 1];

            buf[i] = ch;

            ii++;

            printf( "%s", &buf[i++] );  /* Print remainder of the buffer */

            for( j = i; j < ii; j++ )

                putchar( '\010' );

        }

        else

        {

            beep();

        }

    }

    /*

     * Edit complete - transfer the data to the user 

     */

    printf( "%s", &buf[i] );            /* Cursor to end of the buffer */

    if( !abort_flag )

        strcpy( str, buf );             /* Copy buffer to the user */

    else

        ii = 0;

    return ( ii );                               /* Return length of input */

}

/*========================================================================

 *

 *  Get a sex type from the operator

 *

 *  Purpose:

 *      This function is called to Get a sex type from the operator

 *

 *  Parameters:

 *      None

 *

 *  Returns:

 *      A sex type

 *      The unknown sex type is used to signal no change in state

 *

 *========================================================================*/

sex_type getsex( void )

{

    sex_type    curr = unknown;                  /* current sex type in display */

    char        c;

    while( ( c = getinp() ) != ABORT_CHAR )

    {

        if( c == '\n' || c == '\t' )

        {

            return ( curr );

        }

        if( c == 'M' )

        {

            printf( "Male  \010\010\010\010\010\010" );

            curr = male;

        }

        else if( c == 'F' )

        {

            printf( "Female\010\010\010\010\010\010" );

            curr = female;

        }

        else

        {

            beep();

        }

    }

    return ( unknown );

}

/*========================================================================

 *

 *  Get a class descriptor

 *

 *  Purpose:

 *      This function is called to Get a class descriptor

 *

 *  Parameters:

 *      None

 *

 *  Returns:

 *      An integer which is the index into the  config.team_class array

 *

 *========================================================================*/

int getclass( void )

{

    char        cc[3];                           /* Input character */

    int         i, j;                            /* One those loopy things */

    cc[0] = '\0';

    while( ( j = getstring( 2, cc, AlphnumUpper ) ) != 0 )

    {

        /*

        **  Is this a valid class

        */

        if ( (i = lookup_class(cc, NULL)) > 0 )

            return (i);

        /*

        **  Invalid

        **  Rubout and try again

        */

        beep();

        for( i = 0; i < j; i++ )

            putchar( '\010' );

    }

    return ( 0 );

}

/*========================================================================

 *

 *  Get a country descriptor

 *

 *  Purpose:

 *      This function is called to Get a country descriptor

 *

 *  Parameters:

 *      None

 *

 *  Returns:

 *      An integer which is the index into the config.country_name array.

 *

 *========================================================================*/

int getcountry( void )

{

    char        cc[5];                           /* Input character */

    int         i, j, k;                         /* One those loopy things */

    cc[0] = '\0';

    while( ( j = getstring( 4, cc, Alphanum ) ) != 0 )

    {

        /*

         * Attempt to locate the entered country in the list of defined countries

         */

        for( i = 0; i < MAX_COUNTRY; i++ )

        {

            for( k = 0; k <= j; k++ )

            {

                if( cc[k] == '\000' )

                    return ( ++i );              /* Found it */

                if( toupper( cc[k] ) !=

                    toupper( config.country_name[i].abr[k] ) )

                    break;

            }

        }

        beep();

        for( i = 0; i < j; i++ )

            putchar( '\010' );

    }

    return ( 0 );

}

/*========================================================================

 *

 *  Get menu selector

 *

 *  Purpose:

 *      This function is called to Get menu selector

 *

 *      This function will accept characters until one in

 *      "list" is encountered. This is returned to the user

 *      RETURN is valid if the first character of the list is not a "*"

 *      it will return the first charcater of the list;

 *      ABORT will return a zero

 *

 *  Parameters:

 *      List        A string of valid responses

 *

 *  Returns:

 *      Selected character

 *

 *========================================================================*/

char getfnc( char *list )

{

    char       *copylist;

    char        c;

    char        result = 0;

    copylist = ( *list == '*' ) ? list + 1 : list;

    while( ( c = getinp() ) != ABORT_CHAR )

    {

        c = toupper( c );                        /* Get a character */

        if( strchr( copylist, c ) )

        {

            result = c;

            break;

        }

        if( c == '\n' && *list != '*' )

        {

            result = *list;

            break;

        }

        beep();

    }

    /*

    **  Display the option selected

    **  Not ready for this yet. Looks a bit ugle in a few places

    */

    /*    if ( result )

    **    putchar(result);

    */

    return ( result );

}

/*========================================================================

 *

 *  Prompt for YES / NO

 *

 *  Purpose:

 *      This function is called to Prompt for YES / NO

 *

 *  Parameters:

 *      prompt      Prompt to display to the user

 *

 *  Returns:

 *      TRUE for Yes, FALSE for No

 *

 *========================================================================*/

bool getyes( char *prompt )

{

    char        c;

    printf( "%s ? ", prompt );

    c = getfnc( "*YN" );

    putchar( '\n' );

    return ( c == 'Y' );

}

/*========================================================================

 *

 *  Convert character to upper case

 *

 *  Purpose:

 *      This function is called to convert character to upper case

 *

 *  Parameters:

 *      ch      Character to convert

 *

 *  Returns:

 *      Converted character

 *

 *========================================================================*/

char to_upper( char ch )

{

    if( islower( ch ) )

        return ( ch + 'A' - 'a' );

    return ( ch );

}

/*========================================================================

 *

 *  Convert character to lower case

 *

 *  Purpose:

 *      This function is called to convert character to lower case

 *

 *  Parameters:

 *      ch      Character to convert

 *

 *  Returns:

 *      Converted character

 *

 *========================================================================*/

char to_lower( char ch )

{

    if( isupper( ch ) )

        return ( ch + 'a' - 'A' );

    return ( ch );

}

/*========================================================================

 *

 *  Wait a bit

 *

 *  Purpose:

 *      This function is called to idle and to nothing for a while

 *

 *  Parameters:

 *      t           Time to wait

 *

 *  Returns:

 *      Nothing

 *

 *========================================================================*/

void sleep( int t )

{

    Sleep ( t * 1000 );

}

/*========================================================================

 *

 *  Clear to the end of the current display line

 *

 *  Purpose:

 *      Clears to the end of the line

 *

 *  Parameters:

 *      None

 *

 *  Returns:

 *      Nothing

 *

 *========================================================================*/

void console_clreol( void )

{

    CONSOLE_SCREEN_BUFFER_INFO console_info;

    DWORD                      rlen;

    int ii;

    int top;

    /*

    **  Determine the screen size and the current location of the

    **  cursor within the screen

    */

    GetConsoleScreenBufferInfo( h_console, &console_info );

    /*

    **  Clear all of it

    */

    top = console_info.dwSize.X - console_info.dwCursorPosition.X;

    for ( ii = 0; ii < top ; ii++ )

    {

        WriteConsole( h_console, " ", 1, &rlen, NULL );

    }

    cur ( console_info.dwCursorPosition.X, console_info.dwCursorPosition.Y );

}

/*========================================================================

 *

 *  printf - Text display routines

 *  putchar - Text display routines

 *

 *

 *  Purpose:

 *      Intercept standard output calls and direct output to the

 *      console.

 *

 *  Parameters: As per standard function definitions

 *      None

 *

 *  Returns:

 *      As per standard function definitions

 *

 *========================================================================*/

int putchar(int cc)

{

    printf( "%c", cc );

    return 1;

}

// void gross_error_message(void)

// {

//     LPVOID lpMsgBuf;

//

//     FormatMessage(

//         FORMAT_MESSAGE_ALLOCATE_BUFFER | FORMAT_MESSAGE_FROM_SYSTEM,

//         NULL,

//         GetLastError(),

//         MAKELANGID(LANG_NEUTRAL, SUBLANG_DEFAULT), // Default language

//         (LPTSTR) &lpMsgBuf,

//         0,

//         NULL

//     );

//

//     // Display the string.

//     MessageBox( NULL, lpMsgBuf, "GetLastError", MB_OK|MB_ICONINFORMATION );

//

//     // Free the buffer.

//     LocalFree( lpMsgBuf );

// }

int printf( const char *format, ... )

{

    va_list     ap;

    char        pp[200];

    int         len;

    BOOL        result;

    HANDLE      h_console;

    DWORD       llen;

    DWORD       rlen;

    va_start( ap, format );

    len = vsprintf( pp, format, ap );

    va_end( ap );

    llen = len;

    h_console = GetStdHandle(STD_OUTPUT_HANDLE);

    result = WriteConsole( h_console, pp, llen, &rlen, NULL );

    return ( len );

}

/*========================================================================

 *

 *  Display a prompt character in a highlight

 *

 *  Purpose:

 *      USed to highlight menu entries

 *

 *  Parameters:

 *      None

 *

 *  Returns:

 *      Nothing

 *

 *========================================================================*/

void console_prompt( char prompt )

{

    SetConsoleTextAttribute( h_console, FOREGROUND_GREEN );

    putchar( prompt );

    SetConsoleTextAttribute( h_console, FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE );

}

/*------------------------------------------------------------------------------

Name:           get_kb_character

Description:    Extract a keyboard character - including cursor and function

                keys.

Parameters:     None

Global Refs:

Returns:        a 16 bit value that encodes ascii character and scan code

Side-effects:

------------------------------------------------------------------------------*/

int get_kb_character( void )

{

    HANDLE          hConsoleInput;

    INPUT_RECORD    Buffer;

    DWORD           NumberOfEventsRead;

    hConsoleInput = GetStdHandle(STD_INPUT_HANDLE);

    /*

    **  Process console events until we get a suitable keystroke event

    */

    FlushFileBuffers( h_console );

    for (;;)

    {

        if (ReadConsoleInput( hConsoleInput, &Buffer, 1, &NumberOfEventsRead ))

        {

            /*

            **  Only want keyboard depression - ignore other events

            */

            if (Buffer.EventType == KEY_EVENT && Buffer.Event.KeyEvent.bKeyDown)

            {

                /*

                **  Ignore several scan codes

                **  CNTRL, ALT, SHIFT, CAPLOCK

                */

                if (Buffer.Event.KeyEvent.wVirtualScanCode == 0x38 ||

                    Buffer.Event.KeyEvent.wVirtualScanCode == 0x1D ||

                    Buffer.Event.KeyEvent.wVirtualScanCode == 0x2A ||

                    Buffer.Event.KeyEvent.wVirtualScanCode == 0x3A)

                {

                    continue;

                }

                return ( (int) (Buffer.Event.KeyEvent.uChar.AsciiChar + (Buffer.Event.KeyEvent.wVirtualScanCode << 8)));

            }

        }

    }

}

/********************************* EOF ***********************************/