dev-cpp-users

[Dev-C++] arguments to a program

[Noorez K. <lor...@ho...>]

For a program i'm making, i need to pass a file name, but if it has a space, 
it seems to pass as two arguments, how do get aroung this problem?

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Re: [Dev-C++] arguments to a program

[Robert A. <ral...@gm...>]

You have two options... first you need to understand that the OS is passing
the command like arguments to the program and that the OS determines how th=
e
arguments are separated.

So the easily way to handle it would be to change how the program is run
which would tell the OS that the first argument contains spaces.

./a.out "file name with spaces"
./a.out 'file name with spaces'

the other way to do it would be to assume that there is only one argument t=
o
your application (or that the last argument is the filename) and then build
up your filename and include spaces between arguments provided by the OS,
but you will have problems if there are two adjacent spaces with this
method.

./a,out file name with spaces

....

int main(int argc , char * argv[] )
{
  char * filename =3D NULL;
  unsigned int length =3D 0 ;
  unsigned int marker =3D 0 ;
  if ( argc <=3D 1 ) then exit(1) ;
  for ( int i =3D 1 ; i < argc ; ++i )
     length +=3D strlen(argv[i]) + 1 ;
  filename =3D malloc(length);
  for ( int i =3D 1 ; i < argc ; ++i )
  {
     for ( int j =3D 0 ; j < strlen(argv[i]) ; ++j )
        filename[marker++] =3D argv[i][j] ;
     filename[marker++] =3D ' ' ; /* inserting spaces between shell argumen=
ts
*/
  }
  /* backup and insert end of string marker */
  filename[marker - 1] =3D '\0' ;
.....
......

On 11/26/05, Noorez Kassam <lor...@ho...> wrote:
>
> For a program i'm making, i need to pass a file name, but if it has a
> space,
> it seems to pass as two arguments, how do get aroung this problem?
>
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Re: [Dev-C++] arguments to a program

[lordSauron <lor...@gm...>]

quite simply, you shouldn't break yourself to make the program
idiot-proof.  if you do, the world will just make a better idiot.=20
Don't think too hard about problems that aren't of your making - if it
breaks, it really isn't your fault.  however, this is to be taken
within reason - whacking the x key whenever going to save your file to
prevent a system lockup, while some lazy nuts could call it the users'
problem, really is your problem.  but in most instances, don't worry
about idiots - things need to backfire on 'em *sometime...*