Using a macro helps writing the code to the detriment of the reader
in this case. This is backward. Write once, read many.
The few LOCs gained is not worth the opacity of the implementation.
Signed-off-by: Gaetan Rivet <gaetan.ri...@6wind.com>
---
lib/librte_eal/common/eal_common_pci.c | 67 +++++++++++++++++++++++-----------
1 file changed, 46 insertions(+), 21 deletions(-)
diff --git a/lib/librte_eal/common/eal_common_pci.c
b/lib/librte_eal/common/eal_common_pci.c
index b4e35d0..20ae349 100644
--- a/lib/librte_eal/common/eal_common_pci.c
+++ b/lib/librte_eal/common/eal_common_pci.c
@@ -87,42 +87,67 @@ static struct rte_devargs *pci_devargs_lookup(struct
rte_pci_device *dev)
return NULL;
}
-/* Macro used by pci addr parsing functions. **/
-#define GET_PCIADDR_FIELD(in, fd, lim, dlm) \
-do { \
- unsigned long val; \
- char *end; \
- errno = 0; \
- val = strtoul((in), &end, 16); \
- if (errno != 0 || end[0] != (dlm) || val > (lim)) \
- return -EINVAL; \
- (fd) = (typeof (fd))val; \
- (in) = end + 1; \
-} while(0)
+static inline const char *
+get_u8_pciaddr_field(const char *in, void *_u8, char dlm)
+{
+ unsigned long val;
+ uint8_t *u8 = _u8;
+ char *end;
+
+ errno = 0;
+ val = strtoul(in, &end, 16);
+ if (errno != 0 || end[0] != dlm || val > UINT8_MAX) {
+ errno = errno ? errno : EINVAL;
+ return NULL;
+ }
+ *u8 = (uint8_t)val;
+ return end + 1;
+}
int
eal_parse_pci_BDF(const char *input, struct rte_pci_addr *dev_addr)
{
+ const char *in = input;
+
dev_addr->domain = 0;
- GET_PCIADDR_FIELD(input, dev_addr->bus, UINT8_MAX, ':');
- GET_PCIADDR_FIELD(input, dev_addr->devid, UINT8_MAX, '.');
- GET_PCIADDR_FIELD(input, dev_addr->function, UINT8_MAX, 0);
+ in = get_u8_pciaddr_field(in, &dev_addr->bus, ':');
+ if (in == NULL)
+ return -EINVAL;
+ in = get_u8_pciaddr_field(in, &dev_addr->devid, '.');
+ if (in == NULL)
+ return -EINVAL;
+ in = get_u8_pciaddr_field(in, &dev_addr->function, '\0');
+ if (in == NULL)
+ return -EINVAL;
return 0;
}
int
eal_parse_pci_DomBDF(const char *input, struct rte_pci_addr *dev_addr)
{
- GET_PCIADDR_FIELD(input, dev_addr->domain, UINT16_MAX, ':');
- GET_PCIADDR_FIELD(input, dev_addr->bus, UINT8_MAX, ':');
- GET_PCIADDR_FIELD(input, dev_addr->devid, UINT8_MAX, '.');
- GET_PCIADDR_FIELD(input, dev_addr->function, UINT8_MAX, 0);
+ const char *in = input;
+ unsigned long val;
+ char *end;
+
+ errno = 0;
+ val = strtoul(in, &end, 16);
+ if (errno != 0 || end[0] != ':' || val > UINT16_MAX)
+ return -EINVAL;
+ dev_addr->domain = (uint16_t)val;
+ in = end + 1;
+ in = get_u8_pciaddr_field(in, &dev_addr->bus, ':');
+ if (in == NULL)
+ return -EINVAL;
+ in = get_u8_pciaddr_field(in, &dev_addr->devid, '.');
+ if (in == NULL)
+ return -EINVAL;
+ in = get_u8_pciaddr_field(in, &dev_addr->function, '\0');
+ if (in == NULL)
+ return -EINVAL;
return 0;
}
-#undef GET_PCIADDR_FIELD
-
void
rte_pci_device_name(const struct rte_pci_addr *addr,
char *output, size_t size)
--
2.1.4
