sdcc/support/regression/tests/driverstruct.c

   1 /** Tests a few features of a driver struct - a struct with
   2     many function pointers.
   3 */
   4 #include <testfwk.h>
   5 #include <stddef.h>
   6
   7 /* Set to one to show the bug */
   8 #if 1
   9 #define NAME(_a)        _a
  10 #else
  11 #define NAME(_a)
  12 #endif
  13
  14 typedef unsigned char uchar;
  15
  16 /* Originally from UZIX - http://uzix.sourceforge.net/
  17  */
  18
  19 typedef struct s_devsw {
  20   uchar minors;         /* # of minor device numbers */
  21   int   (*dev_init)(uchar NAME(minor)) __reentrant;
  22   int   (*dev_open)(uchar NAME(minor)) __reentrant;
  23   int   (*dev_close)(uchar NAME(minor)) __reentrant;
  24   int   (*dev_read)(uchar NAME(minor), uchar NAME(w)) __reentrant;
  25   int   (*dev_write)(uchar NAME(minor), uchar NAME(w)) __reentrant;
  26   int   (*dev_ioctl)(uchar NAME(minor), int cmd, void *__data) __reentrant;
  27 } devsw_t;
  28
  29 static int
  30 _init (uchar minor) __reentrant
  31 {
  32   return minor;
  33 }
  34
  35 static devsw_t _sillyDriver = {
  36   1,
  37   _init,
  38   NULL, NULL, NULL, NULL, NULL
  39 };
  40
  41 int
  42 initProxy (devsw_t *pdrv)
  43 {
  44   return (*pdrv->dev_init)(5);
  45 }
  46
  47 void
  48 testDriverStruct (void)
  49 {
  50   ASSERT (initProxy(&_sillyDriver) == 5);
  51 }