/* Conformance Test 18.3.0.1: Verification of realloc library function */ #include #include #include #include int printf(const char *, ...); struct S { int i; extended e; char ch [40]; }; int main (void) { struct S *rgn, *ptr1; struct S s [3] = { {1, 1.0, "hey"}, {2, 2.0, "you"}, {3, 3.0, "person!"} }; /* Pass realloc a NULL pointer to initialally allocate some memory. */ rgn = (struct S *) realloc (NULL, 3 * (sizeof (struct S)) ); if (rgn == NULL) goto Fail1; /* Copy the structure array s into the allocated area. */ memcpy (rgn, s, sizeof (s)); /* Reallocate a larger area -- ensure initial contents are preserved. */ rgn = (struct S *) realloc (rgn, 5 * (sizeof (struct S)) ); if (rgn == NULL) goto Fail1; ptr1 = rgn; if ((ptr1->i != 1) || (fabs(ptr1->e - 1.0) > 0.00001)) goto Fail; if (strcmp (ptr1->ch, "hey")) goto Fail; ptr1 += 1; if ((ptr1->i != 2) || (fabs(ptr1->e - 2.0) > 0.00001)) goto Fail; if (strcmp (ptr1->ch, "you")) goto Fail; ptr1 += 1; if ((ptr1->i != 3) || (fabs(ptr1->e - 3.0) > 0.00001)) goto Fail; if (strcmp (ptr1->ch, "person!")) goto Fail; /* Ensure passing a size of 0 deallocates the memory. */ rgn = (struct S *) realloc (rgn, 0); if (rgn != NULL) goto Fail1; printf ("Passed Conformance Test 18.3.0.1\n"); return 0; Fail: printf ("Failed Conformance Test 18.3.0.1\n"); return 0; Fail1: printf ("Unable to allocate memory for Conformance Test 18.3.0.1\n"); return 0; }