#include "pz.h"

/* IFF2PCS input argument parsing from CLI or Workbench.
** This code should also put up a requester if no argument is specified...
** But doesn't yet.
** Ali Ozer, Nov 1987
*/

/* If called from CLI, argc > 0 and *argv contains program name and arguments.
** If called from WB, argc == 0 and msg points to the arguments.
** Note that ParseFile returns an AmigaDOS file handle as opposed to a C
** file handle. ParseFile will either NOT return or return NULL if something
** goes wrong.
*/
struct FileHandle *ParseArgs (argc, argv, msg)
int argc;    
char **argv;
struct WBStartup *msg;
{
  struct WBArg *arg;
  struct FileHandle *fp = NULL;

  if (argc != 0) { /* Running from the CLI */
    if (argc != 2) Panic ("Usage: IFF2PCS ifffilename");
    else fp = Open (argv[1], MODE_OLDFILE);

  } else {     /* Else a WB argument... */
 
    if ((msg == NULL) || 
        (msg->sm_NumArgs < 2) ||
        ((arg = (msg->sm_ArgList)+1) == NULL))
            Panic ("You need to specify a file (See IFF2PCS.DOC)");
    else {
      struct Lock *olddir = CurrentDir (arg->wa_Lock);
      fp = Open (arg->wa_Name, MODE_OLDFILE);
      if (olddir) CurrentDir (olddir);
    }
  }

  return (fp);
}