UJObject UJDecode()

in src/ujdecode.c [808:896]
76 lines of code
6 McCabe index (conditional complexity)

UJObject UJDecode(const char *input, size_t cbInput, UJHeapFuncs *hf, void **outState)
{
	UJObject ret;
	struct DecoderState *ds;
	void *initialHeap;
	size_t cbInitialHeap;
	HeapSlab *slab;

	JSONObjectDecoder decoder = {
		newString,
		objectAddKey,
		arrayAddItem,
		newTrue,
		newFalse,
		newNull,
		newObject,
		newArray,
		newInt,
		newLong,
		newUnsignedLong,
		newDouble,
		releaseObject,
		NULL,
		NULL,
		NULL,
		NULL,
		NULL,
		0, 
		NULL
	};

	if (hf == NULL)
	{
		decoder.malloc = malloc;
		decoder.free = free;
		decoder.realloc = realloc;
		cbInitialHeap = 16384;
		initialHeap = malloc(cbInitialHeap);

		if (initialHeap == NULL)
		{
			return NULL;
		}
	}
	else
	{
		decoder.malloc = hf->malloc;
		decoder.free = hf->free;
		decoder.realloc = hf->realloc;
		initialHeap = hf->initalHeap;
		cbInitialHeap = hf->cbInitialHeap;
	
		if (cbInitialHeap < sizeof(HeapSlab) + sizeof(struct DecoderState))
		{
			return NULL;
		}
	}

	*outState = NULL;

	slab = (HeapSlab * ) initialHeap;
	slab->start = (unsigned char *) (slab + 1);
	slab->offset = slab->start;
	slab->end = (unsigned char *) initialHeap + cbInitialHeap;
	slab->size = cbInitialHeap;
	slab->owned = hf == NULL ? 1 : 0;
	slab->next = NULL;

	ds = (struct DecoderState *) slab->offset;
	slab->offset += sizeof(struct DecoderState);
	*outState = (void *) ds;

	ds->heap = slab;
	
	ds->malloc = decoder.malloc;
	ds->free = decoder.free;
	ds->error = NULL; 

	decoder.prv = (void *) ds;

	ret = (UJObject) JSON_DecodeObject(&decoder, input, cbInput);

	if (ret == NULL)
	{
		ds->error = decoder.errorStr;
	}

	return ret;
}