structflexarray.c

sdcc是为51等小型嵌入式cpu设计的c语言编译器支持数种不同类型的cpu

/* Check basic behaviour of "flexible array members"
 */
#include <testfwk.h>

#if !defined __GNUC__ || __GNUC__ >= 3
/* flexible array members not supported by gcc < 3 */
struct str1
{
  char c;
  short i[];
};

struct str1 s11 = { 1, {2, 3} };
struct str1 s12 = { 4, {5, 6, 7} }; /* different size */
#endif

static void
testFlexibleArray1(void)
{
#if !defined __GNUC__ || __GNUC__ >= 3
  /* flexible array members not supported by gcc < 3 */
  /* test sizeof */
  ASSERT(sizeof(s11) == 1);
  /* test allocation size */
#if ! defined(PORT_HOST)
   ASSERT((char *) &s12 - (char *) &s11 == 1 + 4);
#endif
#endif
}


/* test initialisation with string */

#if !defined __GNUC__ || __GNUC__ >= 3
/* flexible array members not supported by gcc < 3 */
struct str2
{
  short s;
  char str2[];
};

struct str2 s21 = { 1, "sdcc" };
struct str2 s22 = { 2, "sdcc is great" }; /* different size */
#endif

static void
testFlexibleArray2(void)
{
#if !defined __GNUC__ || __GNUC__ >= 3
  /* flexible array members not supported by gcc < 3 */
  /* test sizeof */
  ASSERT(sizeof(s21) == 2);
  /* test allocation size */
#if ! defined(PORT_HOST)
   ASSERT((char *) &s22 - (char *) &s21 == 2 + 5);
#endif
#endif
}