Added memory copy function.

core/exports/librr/memory.h

@@ -9,7 +9,7 @@
 //  If the address of this block is higher than that of block2, the blocks will be swapped internally.
 /// @param length1 The length of the first block.
 /// @param block2 The second block to check for overlapping. 
-/// @param length2 
+/// @param length2 The length of the second block.
 /// @return Whether the two blocks overlap.
 bool_t rr_mem_overlap(void *block1, usz_t length1, void *block2, usz_t length2);
 
@@ -18,11 +18,11 @@ bool_t rr_mem_overlap(void *block1, usz_t length1, void *block2, usz_t length2);
 /// @param block2 Address of the other memory block. In cases where there is a clear correct version,
 ///  this should be the correct data to be checked against.
 /// @param count How many bytes will be checked.
-/// @return Whether the two memory regions are equal
+/// @return Whether the two memory regions are equal.
 bool_t rr_memequ(void *block1, void *block2, usz_t count);
 
-/// @brief Sets all bytes in a memory region all to one byte
+/// @brief Sets all bytes in a memory region all to one byte.
-/// @param destination Address to the memory region to fill with one byte
+/// @param destination Address to the memory region to fill with one byte.
 /// @param count Number of bytes to set; length of 'destination'
 /// @param value Value to write to every bte of 'destination'.
 void rr_memset(void *destination, usz_t count, u8_t value);
@@ -32,9 +32,15 @@ void rr_memset(void *destination, usz_t count, u8_t value);
 /// @param destination Address in memory in which the sequence will be repeated.
 /// @param num_bytes How many bytes of the destination should be filled. The last sequence can be partially finished.
 /// @param sequence Sequence of bytes which will be written to destination.
-/// @param len_sequence Length of 'sequence'
+/// @param len_sequence Length of 'sequence'.
 /// @return The number of attempted or partial repetitions which have been performed.
 usz_t rr_memrep(void *destination, usz_t num_bytes, void *sequence, usz_t len_sequence);
 
+/// @brief Copies a given number of bytes from a source memory region to a destination memory region.
+/// @attention The source and the destination cannot overlap!
+/// @param destination Memory region to which to write.
+/// @param source Memory region from which to read the bytes to write into the destination.
+/// @param num_bytes Number of bytes to copy from the source to the destination.
+void rr_memcopy(void *destination, void *source, usz_t num_bytes);
 
 #endif // RR_MEMORY_H

core/src-c/memory.c

@@ -49,3 +49,12 @@ usz_t rr_memrep(void *destination, usz_t num_bytes, void *sequence, usz_t len_se
     return (num_bytes / len_sequence)           // How many full repetitions are performed
         + ((num_bytes % len_sequence) != 0);    // One more if a partial repetiton is done
 }
+
+void rr_memcopy(void *destination, void *source, usz_t num_bytes)
+{
+    if(rr_mem_overlap(destination, num_bytes, source, num_bytes)) return;
+    u8_t           *destination_8       = destination;
+    u8_t           *source_8            = source;
+    for(usz_t index = 0; index < num_bytes; ++index)
+        destination_8[index]                = source_8[index];
+}