/*
cbf_realloc should:
behave in a similar way to malloc, if given no or zero 'old_nelem';
behave in a similar way to free, if given 0 for 'elsize' or 'nelem';
retain the contents of any allocated block up to the minimum of
'*old_nelem * elsize' (the old size) and 'nelem * elsize' (the new size).
*/
testResult_t test_cbf_realloc()
{
testResult_t r = {0,0,0};
int error = CBF_SUCCESS;
int * block = NULL;
size_t nelem = 0;
/* test expected failures */
TEST_CBF_FAIL(cbf_realloc(0,&nelem,sizeof(int),4));
TEST_CBF_FAIL(cbf_realloc((void**)&block,&nelem,0,4));
/* check a precondition */
TEST(!block);
/* allocate */
TEST_CBF_PASS(cbf_realloc((void**)&block,&nelem,sizeof(int),4));
TEST(block);
/* fill with some sample data */
block[0] = 0;
block[1] = 1;
block[2] = 2;
block[3] = 3;
/* reallocate */
TEST_CBF_PASS(cbf_realloc((void**)&block,&nelem,sizeof(int),8));
TEST(block);
/* check the sample data */
TEST(0==block[0]);
TEST(1==block[1]);
TEST(2==block[2]);
TEST(3==block[3]);
/* free */
TEST_CBF_PASS(cbf_realloc((void**)&block,&nelem,sizeof(int),0));
/* Note: this doesn't check that 'block' has been free'd, valgrind is required for that. */
TEST(!block);
return r;
}
int cbf_alloc (void **new_block, size_t *new_nelem,
size_t elsize, size_t nelem)
{
/* Are the arguments valid? */
if (!new_block)
return CBF_ARGUMENT;
/* Initialise */
*new_block = NULL;
if (new_nelem)
*new_nelem = 0;
/* Allocate the memory */
return cbf_realloc (new_block, new_nelem, elsize, nelem);
}