Merge pull request #10 from dron0gus/fragments-return

copyRange(): return actual data copies (wthout zero filled)

util/include/rusefi/fragments.h

@@ -48,7 +48,7 @@ struct FragmentList {
 };
 
 // copy `size` of fragmented outputs in to destination, skipping the first `skip` bytes
-void copyRange(uint8_t* destination, FragmentList src, size_t skip, size_t size);
+size_t copyRange(uint8_t* destination, FragmentList src, size_t skip, size_t size);
 // returns pointer to actual data and size of contiguous data
 // if data is located in more than one fragmnet - returned value will be size available in first fragment
 size_t getRangePtr(uint8_t **ptr, FragmentList src, size_t offset, size_t size);

util/src/fragments.cpp

@@ -10,7 +10,7 @@
 #include <rusefi/math.h>
 #include <cstring>
 
-void copyRange(uint8_t* destination, FragmentList src, size_t skip, size_t size) {
+size_t copyRange(uint8_t* destination, FragmentList src, size_t skip, size_t size) {
 	size_t fragmentIndex = 0;
 
 	// Find which fragment to start - skip any full fragments smaller than `skip` parameter
@@ -25,7 +25,7 @@ void copyRange(uint8_t* destination, FragmentList src, size_t skip, size_t size)
 		if (fragmentIndex >= src.count) {
 			// somehow we are past the end of fragments - fill with zeros
 			memset(destination + destinationIndex, 0, size);
-			return;
+			return destinationIndex;
 		}
 
 		int copyNowSize = minI(size, src.fragments[fragmentIndex].size - skip);
@@ -41,6 +41,7 @@ void copyRange(uint8_t* destination, FragmentList src, size_t skip, size_t size)
 		size -= copyNowSize;
 		fragmentIndex++;
 	}
+	return destinationIndex;
 }
 
 size_t getRangePtr(uint8_t **ptr, FragmentList src, size_t offset, size_t size)