io.c

GPS导航定位程序

#include "includes.h"

/****************************************************************************    
* Function: void QuitGpsBuilder(void)
*
* Perform an orderly shutdown of the GPS Builder.
*
* Input: None.
*
* Output: None.
*
* Return Value: None.
****************************************************************************/
void QuitGpsBuilder(void)
{
    int stack_counter;                                /* The stack number. */

    PROTECT++;
    nosound();              /* In case a speaker tone was being generated. */
    ClearToEndOfLine(1,25);
    gotoxy(1,24);
    Rx2Stop();                     /* Close Rinex2 files if they are open. */

    /* Close the COM port if RTCM input was previously assigned to it .*/

    if(BeacPort)
	RestoreSerialInt();

    disable();
    outpw(GPIMASK,MASK_INTERRUPT);                     /* Mask interrupts. */
    setvect(gpvec,oldisrK);                           /* Restore old ISRs. */
    outp(0x21,oldmskA);                    /* Restore old interrupt masks. */
    outp(0xA1,oldmskB);
    RestoreCursor();
    enable();

    /* Return previously allocated memory blocks to the far heap. */

    for(stack_counter=2;stack_counter<=0;stack_counter--)
	if(ISTACKS[stack_counter] != NULL)
	    farfree(ISTACKS[stack_counter]);
    if(obsbuff != NULL) farfree(obsbuff);

    stack_counter = 0;
    while(stricmp(TCB[stack_counter].TNAME,"MAIN"))
    {
	if(TCB[stack_counter].TSTACK!=NULL)
	    farfree(TCB[stack_counter].TSTACK);
	stack_counter++;
    }

    fcloseall();                                /* Close all open streams. */
    ClearToEndOfLine(1,25);
    OutputString(1,25,"Press Any Key To Return To DOS");
    while(!kbhit());
    ClearScreen();
    exit(0);                                               /* Exit to DOS. */
}

/****************************************************************************    
* Function: int GetKey(void)
*
* Performs interpretation of key presses.
*
* Input: None.
*
* Output: None.
*
* Return Value: A code representing the key pressed.
****************************************************************************/
int GetKey(void)
{
    int key;

    if((key=getch())==0)                   /* An extended key was pressed. */
    {
	key = getch();             /* Read the next character if extended. */
	key = key + 128;             /* So Starlink constants can be used. */
	return(key);
    }
    else                                  /* Non extended key was pressed. */
	return(toupper(key));
}

/****************************************************************************    
* Function: void OutputString(int column, int row, char *string)
*
* Displays string at cursor position column, row. 1,1 is top left corner.
*
* Input: column - the column number (1-80).
*        row - the row number (1-25).
*        *string - pointer to the string to be displayed.
*
* Output: None.
*
* Return Value: None.
****************************************************************************/
void OutputString(int column, int row, char *string)
{
    PROTECT++;
    gotoxy(column,row);
    cputs(string);
    PROTECT--;
}

/****************************************************************************    
* Function: void OutputCharacter(int column, int row, char character)
*
* Display character at cursor position column, row. 1,1 is top left corner.
*
* Input: column - the column number (1-80).
*        row - the row number (1-25).
*        character - the character to be displayed.
*
* Output: None.
*
* Return Value: None.
****************************************************************************/
void OutputCharacter(int column, int row, char character)
{
    PROTECT++;
    gotoxy(column,row);
    putch(character);
    PROTECT--;
}

/****************************************************************************    
* Function: void ClearToEndOfLine(int column, int row)
*
* Clears line from cursor at position column, row to the end of the line.
* 1,1 is top left corner.
*
* Input: column - the column number (1-80).
*        row - the row number (1-25).
*
* Output: None.
*
* Return Value: None.
****************************************************************************/
void ClearToEndOfLine(int column, int row)
{
    PROTECT++;
    gotoxy(column,row);
    clreol();
    PROTECT--;
}

/****************************************************************************    
* Function: void Keyboard(void)
*
* Checks for command input from keyboard or file and process the command
* if present.
*
* Input: None.
*
* Output: None.
*
* Return Value: None.
****************************************************************************/
void Keyboard(void)
{
    GetCommand();                  /* Process command characters (if any). */
    if(cbready==1)
    {
	ProcessCommand();
	cbindex=0;
	cb[cbindex]=0;
    }
}

/****************************************************************************    
* Function: void QuitGpsBuilderWithError(void)
*
* Perform an orderly shutdown of the GPS Builder when an error condition
* occurs.
*
* Input: None.
*
* Output: None.
*
* Return Value: None.
****************************************************************************/
void QuitGpsBuilderWithError(void)
{
    int stack_counter;                                /* The stack number. */

    PROTECT++;
    nosound();              /* In case a speaker tone was being generated. */
    ClearToEndOfLine(1,25);
    gotoxy(1,24);
    Rx2Stop();                     /* Close Rinex2 files if they are open. */

    /* Close the COM port if RTCM input was previously assigned to it. */

    if(BeacPort)
	RestoreSerialInt();

    disable();
    outpw(GPIMASK,MASK_INTERRUPT);                     /* Mask interrupts. */
    setvect(gpvec,oldisrK);                           /* Restore old ISRs. */
    outp(0x21,oldmskA);                    /* Restore old interrupt masks. */
    outp(0xA1,oldmskB);
    RestoreCursor();
    enable();

    /* Return previously allocated memory blocks to the far heap. */

    for(stack_counter=2;stack_counter<=0;stack_counter--)
	if(ISTACKS[stack_counter] != NULL)
	    farfree(ISTACKS[stack_counter]);
    if(obsbuff != NULL) farfree(obsbuff);

    stack_counter = 0;
    while(stricmp(TCB[stack_counter].TNAME,"MAIN"))
    {
	if(TCB[stack_counter].TSTACK!=NULL)
	    farfree(TCB[stack_counter].TSTACK);
	stack_counter++;
    }

    fcloseall();                                /* Close all open streams. */
    ClearToEndOfLine(1,25);
    OutputString(1,25,"A FATAL ERROR HAS OCCURRED - Press Any Key");
    while(!kbhit())
	continue;
    textmode(BW80);
    exit(0);                                               /* Exit to DOS. */
}

/****************************************************************************    
* Function: void ScreenSave(FILE *fpScreenSave)
*
* Save the currently displayed screen to a text file.
*
* Input: *fpScreenSave - pointer to the target file.
*
* Output: None.
*
* Return Value: None.
****************************************************************************/
void ScreenSave(FILE *fpScreenSave)
{
    char screen[4000]; /* Screen is saved in here. Entries alternate between
			  character and character attribute. */

    int character;     /* Index to screen array */
    int column;        /* Number of columns */

    gettext(1,1,80,25,screen);  /* Coord 1,1 to 80,25 */

    column = 1;
    for(character=0;character<4000;character+=2)
    {
	fputc(screen[character],fpScreenSave);
	column++;
	if(column==81) /* Insert newline */
	{
	    fputc('\n',fpScreenSave);
	    column = 1;
	}
    }
}

/****************************************************************************    
* Function: void WarningMessage(char *message)
*
* Display a warning message at line 25.
*
* Input: *message - pointer to the warning message.
*
* Output: None.
*
* Return Value: None.
****************************************************************************/
void WarningMessage(char *message)
{
    char buff[90];                      /* Warning string to be displayed. */

    sprintf(buff,"WARNING: %s",message);
    ClearToEndOfLine(1,25);
    OutputString(1,25,buff);
}