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#ifdef vxworks

#  include <stdio.h>

/* VxWorks does not supply atoi.  */

static int

atoi (z)

     char *z;

{

  int i = 0;

  while (*z >= '0' && *z <= '9')

    i = i * 10 + (*z++ - '0');

  return i;

}

/* I don't know of any way to pass an array to VxWorks.  This function

   can be called directly from gdb.  */

vxmain (arg)

char *arg;

{

  char *argv[2];

  argv[0] = "";

  argv[1] = arg;

  main (2, argv, (char **) 0);

}

#else /* ! vxworks */

#  include <stdio.h>

#  include <stdlib.h>

#endif /* ! vxworks */

/*

 * The following functions do nothing useful.  They are included simply

 * as places to try setting breakpoints at.  They are explicitly

 * "one-line functions" to verify that this case works (some versions

 * of gcc have or have had problems with this).

 */

#ifdef PROTOTYPES

int marker1 (void) { return (0); }

int marker2 (int a) { return (1); }

void marker3 (char *a, char *b) {}

void marker4 (long d) {}

#else

int marker1 () { return (0); }

int marker2 (a) int a; { return (1); }

void marker3 (a, b) char *a, *b; {}

void marker4 (d) long d; {}

#endif

/*

 *      This simple classical example of recursion is useful for

 *      testing stack backtraces and such.

 */

#ifdef PROTOTYPES

int factorial(int);

int

main (int argc, char **argv, char **envp)

#else

int

main (argc, argv, envp)

int argc;

char *argv[], **envp;

#endif

{

#ifdef usestubs

    set_debug_traps();

    breakpoint();

#endif

    if (argc == 12345) {  /* an unlikely value < 2^16, in case uninited */

        fprintf (stderr, "usage:  factorial <number>\n");

        return 1;

    }

    printf ("%d\n", factorial (atoi ("6")));

    marker1 ();

    marker2 (43);

    marker3 ("stack", "trace");

    marker4 (177601976L);

    argc = (argc == 12345); /* This is silly, but we can step off of it */

    return argc;

}

#ifdef PROTOTYPES

int factorial (int value)

#else

int factorial (value)

int value;

#endif

{

    if (value > 1) {

        value *= factorial (value - 1);

    }

    return (value);

}