Function parse_vc_spec

dpdk/app/test-pmd/cmdline_flow.c:8176–8235

Parse pattern item parameter type. */

/** Parse pattern item parameter type. */
static int
parse_vc_spec(struct context *ctx, const struct token *token,
	      const char *str, unsigned int len,
	      void *buf, unsigned int size)
{
	struct buffer *out = buf;
	struct rte_flow_item *item;
	uint32_t data_size;
	int index;
	int objmask = 0;

	(void)size;
	/* Token name must match. */
	if (parse_default(ctx, token, str, len, NULL, 0) < 0)
		return -1;
	/* Parse parameter types. */
	switch (ctx->curr) {
		static const enum index prefix[] = NEXT_ENTRY(COMMON_PREFIX);

	case ITEM_PARAM_IS:
		index = 0;
		objmask = 1;
		break;
	case ITEM_PARAM_SPEC:
		index = 0;
		break;
	case ITEM_PARAM_LAST:
		index = 1;
		break;
	case ITEM_PARAM_PREFIX:
		/* Modify next token to expect a prefix. */
		if (ctx->next_num < 2)
			return -1;
		ctx->next[ctx->next_num - 2] = prefix;
		/* Fall through. */
	case ITEM_PARAM_MASK:
		index = 2;
		break;
	default:
		return -1;
	}
	/* Nothing else to do if there is no buffer. */
	if (!out)
		return len;
	if (!out->args.vc.pattern_n)
		return -1;
	item = &out->args.vc.pattern[out->args.vc.pattern_n - 1];
	data_size = ctx->objdata / 3; /* spec, last, mask */
	/* Point to selected object. */
	ctx->object = out->args.vc.data + (data_size * index);
	if (objmask) {
		ctx->objmask = out->args.vc.data + (data_size * 2); /* mask */
		item->mask = ctx->objmask;
	} else
		ctx->objmask = NULL;
	/* Update relevant item pointer. */
	*((const void **[]){ &item->spec, &item->last, &item->mask })[index] =
		ctx->object;