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