[coreboot-gerrit] Patch set updated for coreboot: eebd9af libpayload/endian.h: Provide alignment-agnostic enc/dec bytestreams.
Edward O'Callaghan (eocallaghan@alterapraxis.com)
gerrit at coreboot.org
Fri Feb 14 01:55:07 CET 2014
Edward O'Callaghan (eocallaghan at alterapraxis.com) just uploaded a new patch set to gerrit, which you can find at http://review.coreboot.org/5198
-gerrit
commit eebd9af3b318164e606dfc9e4719db8c6b2866df
Author: Edward O'Callaghan <eocallaghan at alterapraxis.com>
Date: Wed Feb 12 21:53:44 2014 +1100
libpayload/endian.h: Provide alignment-agnostic enc/dec bytestreams.
Alignment-agnostic encode/decode bytestream to/from little/big endian.
The le16enc(), le16dec(), le32enc(), le32dec() functions encode and
decode integers to/from byte strings on any alignment in big/little
endian format. See BYTEORDER(9).
Change-Id: I73a174b9c02c467bc60590c5cd894dac58b8683a
Signed-off-by: Edward O'Callaghan <eocallaghan at alterapraxis.com>
---
payloads/libpayload/include/endian.h | 74 +++++++++++++++++++++++++++++++++++-
1 file changed, 72 insertions(+), 2 deletions(-)
diff --git a/payloads/libpayload/include/endian.h b/payloads/libpayload/include/endian.h
index cb50443..2eaddf6 100644
--- a/payloads/libpayload/include/endian.h
+++ b/payloads/libpayload/include/endian.h
@@ -69,7 +69,7 @@ static inline uint64_t swap_bytes64(uint64_t in)
#error Cant tell if the CPU is little or big endian.
-#endif
+#endif /* CONFIG_*_ENDIAN */
#define be16toh(in) htobe16(in)
#define be32toh(in) htobe32(in)
@@ -87,6 +87,76 @@ static inline uint64_t swap_bytes64(uint64_t in)
#define ntohl(in) be32toh(in)
#define ntohll(in) be64toh(in)
+/*
+ * Alignment-agnostic encode/decode bytestream to/from little/big endian.
+ */
+
+static inline uint16_t be16dec(const void *pp)
+{
+ uint8_t const *p = (uint8_t const *)pp;
+
+ return ((p[0] << 8) | p[1]);
+}
+
+static inline uint32_t be32dec(const void *pp)
+{
+ uint8_t const *p = (uint8_t const *)pp;
+
+ return (((unsigned)p[0] << 24) | (p[1] << 16) | (p[2] << 8) | p[3]);
+}
+
+static inline uint16_t le16dec(const void *pp)
+{
+ uint8_t const *p = (uint8_t const *)pp;
+
+ return ((p[1] << 8) | p[0]);
+}
+
+static inline uint32_t le32dec(const void *pp)
+{
+ uint8_t const *p = (uint8_t const *)pp;
+
+ return ((p[3] << 24) | (p[2] << 16) | (p[1] << 8) | p[0]);
+}
+
+static inline void bebitenc(void *pp, uint32_t u, uint8_t b)
+{
+ uint8_t *p = (uint8_t *)pp;
+ int i;
+
+ for(i=(b-1); i >= 0; i++)
+ p[i] = (u >> i*8) & 0xFF;
+}
+
+static inline void be16enc(void *pp, uint16_t u)
+{
+ bebitenc(pp, u, 2);
+}
+
+static inline void be32enc(void *pp, uint32_t u)
+{
+ bebitenc(pp, u, 4);
+}
+
+static inline void lebitenc(void *pp, uint32_t u, uint8_t b)
+{
+ uint8_t *p = (uint8_t *)pp;
+ int i;
+
+ for(i=0; i < b; i++)
+ p[i] = (u >> i*8) & 0xFF;
+}
+
+static inline void le16enc(void *pp, uint16_t u)
+{
+ lebitenc(pp, u, 2);
+}
+
+static inline void le32enc(void *pp, uint32_t u)
+{
+ lebitenc(pp, u, 4);
+}
+
/* Deprecated names (not in glibc / BSD) */
#define htobew(in) htobe16(in)
#define htobel(in) htobe32(in)
@@ -101,4 +171,4 @@ static inline uint64_t swap_bytes64(uint64_t in)
#define letohl(in) le32toh(in)
#define letohll(in) le64toh(in)
-#endif
+#endif /* _ENDIAN_H_ */
More information about the coreboot-gerrit
mailing list