tests/tests2/90_struct-init.c

   1 typedef unsigned char u8;
   2 typedef struct {} empty_s;
   3 struct contains_empty {
   4     u8 a;
   5     empty_s empty;
   6     u8 b;
   7 };
   8 struct contains_empty ce = { { (1) }, (empty_s){}, 022, };
   9 /* The following decl of 'q' would demonstrate the TCC bug in init_putv when
  10    handling copying compound literals.  (Compound literals
  11    aren't acceptable constant initializers in isoc99, but
  12    we accept them like gcc, except for this case)
  13 //char *q = (char *){ "trara" }; */
  14 struct SS {u8 a[3], b; };
  15 struct SS sinit16[] = { { 1 }, 2 };
  16 struct S
  17 {
  18   u8 a,b;
  19   u8 c[2];
  20 };
  21
  22 struct T
  23 {
  24   u8 s[16];
  25   u8 a;
  26 };
  27
  28 struct U
  29 {
  30   u8 a;
  31   struct S s;
  32   u8 b;
  33   struct T t;
  34 };
  35
  36 struct V
  37 {
  38   struct S s;
  39   struct T t;
  40   u8 a;
  41 };
  42
  43 struct W
  44 {
  45   struct V t;
  46   struct S s[];
  47 };
  48
  49 struct S gs = ((struct S){1, 2, 3, 4});
  50 struct S gs2 = {1, 2, {3, 4}};
  51 struct T gt = {"hello", 42};
  52 struct U gu = {3, 5,6,7,8, 4, "huhu", 43};
  53 struct U gu2 = {3, {5,6,7,8}, 4, {"huhu", 43}};
  54 /* Optional braces around scalar initializers.  Accepted, but with
  55    a warning.  */
  56 struct U gu3 = { {3}, {5,6,7,8,}, 4, {"huhu", 43}};
  57 /* Many superfluous braces and leaving out one initializer for U.s.c[1] */
  58 struct U gu4 = { 3, {5,6,7,},  5, { "bla", {44}} };
  59 /* Superfluous braces and useless parens around values */
  60 struct S gs3 = { (1), {(2)}, {(((3))), {4}}};
  61 /* Superfluous braces, and leaving out braces for V.t, plus cast */
  62 struct V gv = {{{3},4,{5,6}}, "haha", (u8)45, 46};
  63 /* Compound literal */
  64 struct V gv2 = {(struct S){7,8,{9,10}}, {"hihi", 47}, 48};
  65 /* Parens around compound literal */
  66 struct V gv3 = {((struct S){7,8,{9,10}}), {"hoho", 49}, 50};
  67 /* Initialization of a flex array member (warns in GCC) */
  68 struct W gw = {{1,2,3,4}, {1,2,3,4,5}};
  69
  70 union UU {
  71     u8 a;
  72     u8 b;
  73 };
  74 struct SU {
  75     union UU u;
  76     u8 c;
  77 };
  78 struct SU gsu = {5,6};
  79
  80 /* Unnamed struct/union members aren't ISO C, but it's a widely accepted
  81    extension.  See below for further extensions to that under -fms-extension.*/
  82 union UV {
  83     struct {u8 a,b;};
  84     struct S s;
  85 };
  86 union UV guv = {{6,5}};
  87 union UV guv2 = {{.b = 7, .a = 8}};
  88 union UV guv3 = {.b = 8, .a = 7};
  89
  90 /* Under -fms-extensions also the following is valid:
  91 union UV2 {
  92     struct Anon {u8 a,b;};    // unnamed member, but tagged struct, ...
  93     struct S s;
  94 };
  95 struct Anon gan = { 10, 11 }; // ... which makes it available here.
  96 union UV2 guv4 = {{4,3}};     // and the other inits from above as well
  97 */
  98
  99 struct in6_addr {
 100     union {
 101         u8 u6_addr8[16];
 102         unsigned short u6_addr16[8];
 103     } u;
 104 };
 105 struct flowi6 {
 106     struct in6_addr saddr, daddr;
 107 };
 108 struct pkthdr {
 109     struct in6_addr daddr, saddr;
 110 };
 111 struct pkthdr phdr = { { { 6,5,4,3 } }, { { 9,8,7,6 } } };
 112
 113 struct Wrap {
 114     void *func;
 115 };
 116 int global;
 117 void inc_global (void)
 118 {
 119   global++;
 120 }
 121
 122 struct Wrap global_wrap[] = {
 123     ((struct Wrap) {inc_global}),
 124     inc_global,
 125 };
 126
 127 #include <stdio.h>
 128 void print_ (const char *name, const u8 *p, long size)
 129 {
 130   printf ("%s:", name);
 131   while (size--) {
 132       printf (" %x", *p++);
 133   }
 134   printf ("\n");
 135 }
 136 #define print(x) print_(#x, (u8*)&x, sizeof (x))
 137 #if 1
 138 void foo (struct W *w, struct pkthdr *phdr_)
 139 {
 140   struct S ls = {1, 2, 3, 4};
 141   struct S ls2 = {1, 2, {3, 4}};
 142   struct T lt = {"hello", 42};
 143   struct U lu = {3, 5,6,7,8, 4, "huhu", 43};
 144   struct U lu1 = {3, ls, 4, {"huhu", 43}};
 145   struct U lu2 = {3, (ls), 4, {"huhu", 43}};
 146   const struct S *pls = &ls;
 147   struct S ls21 = *pls;
 148   struct U lu22 = {3, *pls, 4, {"huhu", 43}};
 149   /* Incomplete bracing.  */
 150   struct U lu21 = {3, ls, 4, "huhu", 43};
 151   /* Optional braces around scalar initializers.  Accepted, but with
 152      a warning.  */
 153   struct U lu3 = { 3, {5,6,7,8,}, 4, {"huhu", 43}};
 154   /* Many superfluous braces and leaving out one initializer for U.s.c[1] */
 155   struct U lu4 = { 3, {5,6,7,},  5, { "bla", 44} };
 156   /* Superfluous braces and useless parens around values */
 157   struct S ls3 = { (1), (2), {(((3))), 4}};
 158   /* Superfluous braces, and leaving out braces for V.t, plus cast */
 159   struct V lv = {{3,4,{5,6}}, "haha", (u8)45, 46};
 160   /* Compound literal */
 161   struct V lv2 = {(struct S)w->t.s, {"hihi", 47}, 48};
 162   /* Parens around compound literal */
 163   struct V lv3 = {((struct S){7,8,{9,10}}), ((const struct W *)w)->t.t, 50};
 164   const struct pkthdr *phdr = phdr_;
 165   struct flowi6 flow = { .daddr = phdr->daddr, .saddr = phdr->saddr };
 166   int elt = 0x42;
 167   /* Range init, overlapping */
 168   struct T lt2 = { { [1 ... 5] = 9, [6 ... 10] = elt, [4 ... 7] = elt+1 }, 1 };
 169   print(ls);
 170   print(ls2);
 171   print(lt);
 172   print(lu);
 173   print(lu1);
 174   print(lu2);
 175   print(ls21);
 176   print(lu21);
 177   print(lu22);
 178   print(lu3);
 179   print(lu4);
 180   print(ls3);
 181   print(lv);
 182   print(lv2);
 183   print(lv3);
 184   print(lt2);
 185   print(flow);
 186 }
 187 #endif
 188
 189 void test_compound_with_relocs (void)
 190 {
 191   struct Wrap local_wrap[] = {
 192       ((struct Wrap) {inc_global}),
 193       inc_global,
 194   };
 195   void (*p)(void);
 196   p = global_wrap[0].func; p();
 197   p = global_wrap[1].func; p();
 198   p = local_wrap[0].func; p();
 199   p = local_wrap[1].func; p();
 200 }
 201
 202 void sys_ni(void) { printf("ni\n"); }
 203 void sys_one(void) { printf("one\n"); }
 204 void sys_two(void) { printf("two\n"); }
 205 void sys_three(void) { printf("three\n"); }
 206 typedef void (*fptr)(void);
 207 const fptr table[3] = {
 208     [0 ... 2] = &sys_ni,
 209     [0] = sys_one,
 210     [1] = sys_two,
 211     [2] = sys_three,
 212 };
 213
 214 void test_multi_relocs(void)
 215 {
 216   int i;
 217   for (i = 0; i < sizeof(table)/sizeof(table[0]); i++)
 218     table[i]();
 219 }
 220 \f
 221 /* Following is from GCC gcc.c-torture/execute/20050613-1.c.  */
 222
 223 struct SEA { int i; int j; int k; int l; };
 224 struct SEB { struct SEA a; int r[1]; };
 225 struct SEC { struct SEA a; int r[0]; };
 226 struct SED { struct SEA a; int r[]; };
 227
 228 static void
 229 test_correct_filling (struct SEA *x)
 230 {
 231   static int i;
 232   if (x->i != 0 || x->j != 5 || x->k != 0 || x->l != 0)
 233     printf("sea_fill%d: wrong\n", i);
 234   else
 235     printf("sea_fill%d: okay\n", i);
 236   i++;
 237 }
 238
 239 int
 240 test_zero_init (void)
 241 {
 242   /* The peculiarity here is that only a.j is initialized.  That
 243      means that all other members must be zero initialized.  TCC
 244      once didn't do that for sub-level designators.  */
 245   struct SEB b = { .a.j = 5 };
 246   struct SEC c = { .a.j = 5 };
 247   struct SED d = { .a.j = 5 };
 248   test_correct_filling (&b.a);
 249   test_correct_filling (&c.a);
 250   test_correct_filling (&d.a);
 251   return 0;
 252 }
 253 \f
 254 int main()
 255 {
 256   print(ce);
 257   print(gs);
 258   print(gs2);
 259   print(gt);
 260   print(gu);
 261   print(gu2);
 262   print(gu3);
 263   print(gu4);
 264   print(gs3);
 265   print(gv);
 266   print(gv2);
 267   print(gv3);
 268   print(sinit16);
 269   print(gw);
 270   print(gsu);
 271   print(guv);
 272   print(guv.b);
 273   print(guv2);
 274   print(guv3);
 275   print(phdr);
 276   foo(&gw, &phdr);
 277   //printf("q: %s\n", q);
 278   test_compound_with_relocs();
 279   test_multi_relocs();
 280   test_zero_init();
 281   return 0;
 282 }