getdelim()

[zhankal]

For a string problem, I tried to use getdelim function and I get this warning :

warning: implicit declaration of function ‘getdelim’

I guess it's a library problem although I have tried to include some of them.

Any suggestion?

[Sebastiani]

I've never heard of it. You need to find out what header file to include, and what, if any, linker files (.dll, .so, .lib, etc) are needed to access the function.

[zhankal]

I've never heard of it. You need to find out what header file to include, and what, if any, linker files (.dll, .so, .lib, etc) are needed to access the function.

Yeah, I'm trying to find that header file. I actually found some stuff like including #define _GNU_SOURCE ...but that didn't work.

[cas]

You need to define _GNU_SOURCE before including stdio.h. Generally this is done on the commandline, as in "cc -D_GNU_SOURCE", but you could also do it at the very top of your source file.

[zhankal]

You need to define _GNU_SOURCE before including stdio.h. Generally this is done on the commandline, as in "cc -D_GNU_SOURCE", but you could also do it at the very top of your source file.

Well i tried to include it before including the stdio.h and I get this error , interesting

error: pointer targets in passing argument 2 of ‘getdelim’ differ in signedness

[matsp]

Well i tried to include it before including the stdio.h and I get this error , interesting

error: pointer targets in passing argument 2 of ‘getdelim’ differ in signedness

Post your code. Most likely you are passing a pointer to unsigned char, and the function expects a regular char, but it's not possible to say without seeing the code.

--
Mats

[zhankal]

Post your code. Most likely you are passing a pointer to unsigned char, and the function expects a regular char, but it's not possible to say without seeing the code.

--
Mats

#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>



int main()
{
  int bytes_read;
  int nbytes = 100;
  char *my_string;

  puts ("Please enter a line of text.");

  /* These 2 lines are the heart of the program. */
  my_string = (char *) malloc (nbytes + 1);
  bytes_read = getdelim (&my_string, &nbytes,'\n', stdin);


  if (bytes_read == -1)
    {
      puts ("ERROR!");
    }
  else
    {
      puts ("You typed:");
      puts (my_string);
    }

  return 0;
}

This is just a simple code that i tried the use of getdelim.

[matsp]

Parameter 2 in getdelim is a pointer to size_t, so your nbytes should be of the type size_t (note that int and size_t may be different size as well as different sign - and if it's different size you'd get more problems even if you use unsigned int and the compiler doesn't give this particular warning [it probably will give some other warning tho']).

--
Mats

[zhankal]

Parameter 2 in getdelim is a pointer to size_t, so your nbytes should be of the type size_t (note that int and size_t may be different size as well as different sign - and if it's different size you'd get more problems even if you use unsigned int and the compiler doesn't give this particular warning [it probably will give some other warning tho']).

--
Mats

For just to get rid of this warnings, in what else way can i read the string? (the problem is i need to care about whitespaces and i don't know the size of input)