Stock Market

/* This  is a program for stock market which operates following these operations:    
 1.Register company: In this case it will be register three companies and store these informations inside a file. 
2.Show Company: In this case it will show the details of those three companies which are already stored inside a file. 
Company Details:
                           1. Name of company
                           2. Location of Company
                           3.Annual Income of Company

Note: Name and location of company will be display on CLCD screen where as Annual income of company will be display on 7 Segment. 
*/


#define SIZE 3
#include <stdlib.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <sys/ioctl.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <string.h>

#define  NODE_EXP                         "/dev/fpga_char_lcd"   /* Device name */
#define  LCD_ON                             1 
#define  LCD_CLEAR                       2
#define  LCD_SET_HOME                3
#define  LCD_CURSOR_BLINK        4
#define  LCD_DATA_WRITE             5
#define  LCD_OFF                            6

#define  NODE_EXP1                     "/dev/7seg_led"  /* Device name */
#define  SEG_7_LED_ON                 1  
#define  SEG_7_LED_WRITE           2
#define  SEG_7_LED_CLEAR           3
#define  SEG_7_LED_OFF                4

typedef struct
{
    int turn_over;
    char name[20];
    char address[20];
    //char address[20];
} company;

int main (int argc,char *argv[])
{
    int fd= 0;
    int ctr,n;
    int exp_dev= 0; /* exp_dev is file descriptor */
    int ret,res= 0;  /* return value of system call */
    int exp_dev1= 0; /* exp_dev1 is file descriptor */
    int ret1,res1= 0;  /* return value of system call */

    size_t sw,sp,sj,choice;
    char dummy[40];
    company comp[SIZE], *sptr;
    sptr = comp;     // Eroor may be possible at this point //
   
    //char p[]="This is my first programme of file handling in mtlc";
    while(1)
    {
    printf("Press 1 for Register new company Details:\n");
    printf("Press 2 to show company Details:\n");
    printf("Enter your choice :\n");
    scanf("%d",&choice);
    if(argc!=2)
    {
       printf("\n ERROR: Usage:: File_w <filename> \n");
       return 1;
    }
/* ******************************Open Device**************************  */
    exp_dev = open(NODE_EXP, O_RDWR);     
        if (exp_dev < 0)
    {
        fprintf(stderr, "Open error: %s\n", NODE_EXP);
        return 1;
    }
/* ****************************Open Device**************************  */
     exp_dev1 = open(NODE_EXP1, O_RDWR);     
        if (exp_dev1 < 0){
    fprintf(stderr, "Open error: %s\n", NODE_EXP1); // may be fault //
    return 1;
        }

    /* open as blocking mode */
    switch(choice)
    {
   
/* ****************Application : Register Company **********************   */
    case 1:
    fd = open(argv[1], O_WRONLY | O_CREAT);
    if (fd < 0){
    printf("error opening");
    return 1;
    }
    printf("File is ready to open");
    for(ctr=0; ctr<SIZE; ctr++)
    {
        printf("Welcome !Register your company details:\n ");
        printf("Enter name of company :\n");
        scanf("%s",&comp[ctr].name);
        printf("Enter Address Details of company :\n");
        scanf("%s",&comp[ctr].address);
        printf("Annual turn_over of company :\n");
        scanf("%x",&comp[ctr].turn_over);
    }
    sw=write(fd,sptr,sizeof(comp)*3);
    if(sw<=0)
    {
        printf("\n Zero bytes has been written ....");
        return 1;
    }
   
    printf("file name is :%s\n",argv[1]);
    printf("Registration has been completed \n thank u!\n Have a nice day\n");
    /*for(ctr=0; ctr<SIZE; ctr++)
    {
       
        printf("Registration has been completed \n thank u!\n Have a nice day\n");
    }*/
    getchar();
        close(fd);
    break;
/* ****************Application : Register Company **********************   */

/* ******************Application : Read Company Detail********************  */   
    case 2:
       if (res=ioctl(exp_dev,LCD_ON, NULL) < 0 )      /* Ioctl */
        {
         printf("%d---> Error in switching OFF the LCD \r\n",res);
         getchar();
         close(exp_dev);
         return 1;
         }
        printf("\n LCD_ON: Hit A Key To Continue...");
        getchar();
        if (res=ioctl(exp_dev,LCD_CLEAR, NULL) < 0 )
        {
         printf("%d---> Error in Clearing the LCD \r\n",res);
         getchar();
         close(exp_dev);
         return 1;
        }
       if (res=ioctl(exp_dev,LCD_SET_HOME, NULL) < 0 )
       {
        printf("Error in Set home the LCD \r\n");
        getchar();
        close(exp_dev);
        return 1;
        }
       if (ioctl(exp_dev,LCD_CURSOR_BLINK , NULL) < 0 )
       {
        printf("Error inCursor blink in LCD \r\n");
        getchar();
        close(exp_dev);
        return 1;
        }

    /* Open file for read purpose */
/* ****************************Function for 7 Segment ********************** */
       if (res=ioctl(exp_dev,SEG_7_LED_ON, NULL) < 0 )      /* Ioctl */
       {
        printf("%d---> Error in switching OFF the LED \r\n",res);
        getchar();
        close(exp_dev);
        return 1;
        }

/* ****************************Function for 7 Segment ********************** */
    fd = open(argv[1], O_RDONLY);
    if (fd < 0)
    {
     printf("error opening");
     return 1;
     }
         printf("File is ready to open");
         sw = read(fd,sptr,sizeof(comp)*3);
    if(sw<=0)
    {
     printf("\n Zero bytes has been written ....");
     return 1;
     }
    printf("file name is :%s\n",argv[1]);
    for(ctr=0; ctr<SIZE; ctr++)
    {
     printf("\n SPTR = %u \n", sptr);
     sptr++;
    }
    sptr=comp;
    for(ctr=0; ctr<SIZE; ctr++)
    {
     strcpy(dummy, sptr->name);
     strcat(dummy, ", ");
     strcat(dummy, sptr->address);
     printf("\n SPTR = %u, Dummy = %s \n", sptr, dummy);
     printf("\n%d.: Details: Name: %s,\tAddress: %s,\tTurn Over: %d, %x", ctr+1,    sptr->name, sptr->address, sptr->turn_over, sptr->turn_over);
    if (ioctl(exp_dev,LCD_DATA_WRITE, dummy) < 0 )
    {
     printf("Error in switching OFF the LCD \r\n");
     getchar();
     close(exp_dev);
     return 1;
     }
    if (res1=ioctl(exp_dev1,SEG_7_LED_WRITE,sptr->turn_over) < 0 )
    {
     printf("%d---> Error in writing to the 7-Seg LED \r\n",res1);
     getchar();
     close(exp_dev1);
     return 1;
     }
     printf("\n Hit A Key for next record...");
     getchar();
     if(ctr<2)
     {
      sptr++;
      }
  }
   getchar();
  if (ioctl(exp_dev,LCD_OFF, NULL) < 0 )
  {
   printf("Error in switching OFF the LCD \r\n");
   getchar();
   close(exp_dev);
   return 1;
   }
  if (res1=ioctl(exp_dev1,SEG_7_LED_CLEAR, NULL) < 0 )
  {
   printf("%d---> Error in Clearing the LED \r\n",res);
   getchar();
   close(exp_dev1);
   return 1;
   }
  if (ioctl(exp_dev1,SEG_7_LED_OFF, NULL) < 0 )
  {
   printf("Error in switching OFF the LED \r\n");
   getchar();
   close(exp_dev1);
   return 1;
   }
       close(exp_dev1);
       close(exp_dev);
       printf("\n Hit A Key To Stop...");
       getchar();
       close(fd);
   break;
default :
    printf("! sorry invalid request ..");
    break;
    printf("Press 1 for continue and press 0 for exit :...");
    scanf("%d",&n);
    if(n==0)
    {
    exit(0);
    }
}
}
    return 0;
}