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-rw-r--r--src/odhcpd.c30
1 files changed, 30 insertions, 0 deletions
diff --git a/src/odhcpd.c b/src/odhcpd.c
index f40cea0..25a6047 100644
--- a/src/odhcpd.c
+++ b/src/odhcpd.c
@@ -427,3 +427,33 @@ void odhcpd_hexlify(char *dst, const uint8_t *src, size_t len)
}
*dst = 0;
}
+
+
+int odhcpd_bmemcmp(const void *av, const void *bv, size_t bits)
+{
+ const uint8_t *a = av, *b = bv;
+ size_t bytes = bits / 8;
+ bits %= 8;
+
+ int res = memcmp(a, b, bytes);
+ if (res == 0 && bits > 0)
+ res = (a[bytes] >> (8 - bits)) - (b[bytes] >> (8 - bits));
+
+ return res;
+}
+
+
+void odhcpd_bmemcpy(void *av, const void *bv, size_t bits)
+{
+ uint8_t *a = av;
+ const uint8_t *b = bv;
+
+ size_t bytes = bits / 8;
+ bits %= 8;
+ memcpy(a, b, bytes);
+
+ if (bits > 0) {
+ uint8_t mask = (1 << (8 - bits)) - 1;
+ a[bytes] = (a[bytes] & mask) | ((~mask) & b[bytes]);
+ }
+}