From: Tilman Sauerbeck <redacted>
Date: Mon, 16 Nov 2015 18:47:04 +0000 (+0100)
Subject: Add the RB64 macro.
X-Git-Tag: libsigrok-0.4.0~82
X-Git-Url: https://sigrok.org/gitweb/?p=libsigrok.git;a=commitdiff_plain;h=17b93fd7c0c7af90042eac513d837cf1ec2b5f9c

Add the RB64 macro.

Reads an unsigned 64 bit integer from memory.
---

diff --git a/src/libsigrok-internal.h b/src/libsigrok-internal.h
index f3ee2e3b..41754b28 100644
--- a/src/libsigrok-internal.h
+++ b/src/libsigrok-internal.h
@@ -116,6 +116,20 @@ struct zip_stat;
                   ((unsigned)((const uint8_t*)(x))[1] <<  8) |  \
                    (unsigned)((const uint8_t*)(x))[0]))
 
+/**
+ * Read a 64 bits big endian unsigned integer out of memory.
+ * @param x a pointer to the input memory
+ * @return the corresponding unsigned integer
+ */
+#define RB64(x)  (((uint64_t)((const uint8_t*)(x))[0] << 56) | \
+                  ((uint64_t)((const uint8_t*)(x))[1] << 48) |  \
+                  ((uint64_t)((const uint8_t*)(x))[2] << 40) |  \
+                  ((uint64_t)((const uint8_t*)(x))[3] << 32) |  \
+                  ((uint64_t)((const uint8_t*)(x))[4] << 24) |  \
+                  ((uint64_t)((const uint8_t*)(x))[5] << 16) |  \
+                  ((uint64_t)((const uint8_t*)(x))[6] <<  8) |  \
+                   (uint64_t)((const uint8_t*)(x))[7])
+
 /**
  * Read a 32 bits big endian float out of memory.
  * @param x a pointer to the input memory