Help with C program debug

This is a discussion on Help with C program debug within the C Programming forums, part of the General Programming Boards category; Hi folks: Im trying to debug an error in my program and would like anyones help with it. the problem ...

  1. #1
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    Sep 2010
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    1

    Help with C program debug

    Hi folks:
    Im trying to debug an error in my program and would like anyones help with it.

    the problem is in the openpipe routine. Here I have set up a 2D array of 'datastruct' called bigstruct and later on am trying to write values into particular elements of bigstruct.
    I am seeing this error :
    openpipe.c:44: error: expected expression before ‘.’ token
    openpipe.c:48: error: expected expression before ‘.’ token
    openpipe.c:49: error: expected expression before ‘.’ token



    #include <stdio.h>

    // Description: Basically this syscall fills the pipe descriptor data structure pd.
    //It does so only if the process has not already created OPEN_MAX number of pipes


    #define PIPE_BUF 256
    #define OPEN_MAX 5 //max no of pipes for a single process
    #define MAX_PROC 8 //max number of processes running at a given time

    typedef struct pipedesc {
    int owner_pid; // process id of the pipe owner
    int key; // unique key that identifies pipes within the process
    } pipedesc;

    typedef struct datastruct{
    int pid; //process id of pipe owner
    char buf_ptr[PIPE_BUF];
    int state ;
    } bigstruct[MAX_PROC][OPEN_MAX]; //declaring a 2D array

    int pid[MAX_PROC];

    int openpipe (pipedesc *pd)
    {
    int row, column;
    int i,j;
    int curr_pid = (int)getpid();
    for (i=0;i<MAX_PROC;i++)
    {
    if (curr_pid == pid[i])
    {
    printf("Found an entry in big struct with same pid\n");
    row = i;
    for(j=0;j<OPEN_MAX;j++)
    {
    if( (bigstruct[i][j]).state == 0) //*****openpipe.c:44: error: expected expression before ‘.’ token
    {
    printf("Found a cell in big struct with state off\n");
    //Store current process in bigstruct
    bigstruct[i][j].state = 1; //******openpipe.c:44: error: expected expression before ‘.’ token
    bigstruct[i][j].pid = curr_pid; //******openpipe.c:44: error: expected expression before ‘.’ token
    //fill the filedescriptor pd with info about this cell
    pd->owner_pid = curr_pid;
    pd->key = j;
    return 1;
    }
    }
    printf("Maximum number of processes have already been allocated\n");
    return 0;
    }
    }
    printf("Max number of process has been reached\n");
    }


    The main function where I call this is as follows :

    #include <stdio.h>
    #include "openpipe.c"

    int main() {
    pipedesc p1,p2,p3,p4,p5;

    openpipe(p1);

    }

    Any suggestions?

  2. #2
    ... kermit's Avatar
    Join Date
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    Posts
    1,528
    You really should use code tags.

    Code:
    #include <stdio.h>
    
    // Description: Basically this syscall fills the pipe descriptor data structure pd. 
    //It does so only if the process has not already created OPEN_MAX number of pipes
    
    
    #define PIPE_BUF 256
    #define OPEN_MAX 5              //max no of pipes for a single process
    #define MAX_PROC 8              //max number of processes running at a given time
    
    typedef struct pipedesc {
        int owner_pid;              // process id of the pipe owner 
        int key;                    // unique key that identifies pipes within the process
    } pipedesc;
    
    typedef struct datastruct {
        int pid;                    //process id of pipe owner 
        char buf_ptr[PIPE_BUF];
        int state;
    } bigstruct[MAX_PROC][OPEN_MAX];    //declaring a 2D array 
    
    int pid[MAX_PROC];
    
    int openpipe(pipedesc * pd)
    {
        int row, column;
        int i, j;
        int curr_pid = (int) getpid();
        for (i = 0; i < MAX_PROC; i++) {
            if (curr_pid == pid[i]) {
                printf("Found an entry in big struct with same pid\n");
                row = i;
                for (j = 0; j < OPEN_MAX; j++) {
                    if ((bigstruct[i][j]).state == 0)   //*****openpipe.c:44: error: expected expression before ‘.’ token
                    {
                        printf("Found a cell in big struct with state off\n");
    //Store current process in bigstruct
                        bigstruct[i][j].state = 1;  //******openpipe.c:44: error: expected expression before ‘.’ token
                        bigstruct[i][j].pid = curr_pid; //******openpipe.c:44: error: expected expression before ‘.’ token
    //fill the filedescriptor pd with info about this cell
                        pd->owner_pid = curr_pid;
                        pd->key = j;
                        return 1;
                    }
                }
                printf
                    ("Maximum number of processes have already been allocated\n");
                return 0;
            }
        }
        printf("Max number of process has been reached\n");
    }
    
    
    The main function where I call this is as follows:
    #include <stdio.h>
    #include "openpipe.c"
    int main()
    {
        pipedesc p1, p2, p3, p4, p5;
    
        openpipe(p1);
    
    }

  3. #3
    msh
    msh is offline
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    Quote Originally Posted by nikhilbk View Post
    Any suggestions?
    Yea. Read the stickies and learn how to properly post code.

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