Function parse_pci_addr_format

dpdk/drivers/bus/pci/linux/pci.c:396–437

* split up a pci address into its constituent parts. */

 * split up a pci address into its constituent parts.
 */
static int
parse_pci_addr_format(const char *buf, int bufsize, struct rte_pci_addr *addr)
{
	/* first split on ':' */
	union splitaddr {
		struct {
			char *domain;
			char *bus;
			char *devid;
			char *function;
		};
		char *str[PCI_FMT_NVAL]; /* last element-separator is "." not ":" */
	} splitaddr;

	char *buf_copy = strndup(buf, bufsize);
	if (buf_copy == NULL)
		return -1;

	if (rte_strsplit(buf_copy, bufsize, splitaddr.str, PCI_FMT_NVAL, ':')
			!= PCI_FMT_NVAL - 1)
		goto error;
	/* final split is on '.' between devid and function */
	splitaddr.function = strchr(splitaddr.devid,'.');
	if (splitaddr.function == NULL)
		goto error;
	*splitaddr.function++ = '\0';

	/* now convert to int values */
	errno = 0;
	addr->domain = strtoul(splitaddr.domain, NULL, 16);
	addr->bus = strtoul(splitaddr.bus, NULL, 16);
	addr->devid = strtoul(splitaddr.devid, NULL, 16);
	addr->function = strtoul(splitaddr.function, NULL, 10);
	if (errno != 0)
		goto error;

	free(buf_copy); /* free the copy made with strdup */
	return 0;
error:
	free(buf_copy);
	return -1;
}

/*
 * Scan the content of the PCI bus, and the devices in the devices