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Store small byte arrays and strings in storage in one slot with their

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length.
This commit is contained in:
chriseth
2015-10-02 13:12:23 +02:00
parent cae8db989a
commit da408640ca
5 changed files with 339 additions and 50 deletions
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libsolidity/ArrayUtils.h
+6 -1
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@@ -75,9 +75,14 @@ public:
void convertLengthToSize(ArrayType const& _arrayType, bool _pad = false) const;
/// Retrieves the length (number of elements) of the array ref on the stack. This also
/// works for statically-sized arrays.
/// @param _stackDepth number of stack elements between top of stack and top (!) of reference
/// Stack pre: reference (excludes byte offset for dynamic storage arrays)
/// Stack post: reference length
void retrieveLength(ArrayType const& _arrayType) const;
void retrieveLength(ArrayType const& _arrayType, unsigned _stackDepth = 0) const;
/// Stores the length of an array of type @a _arrayType in storage. The length itself is stored
/// on the stack at position @a _stackDepthLength and the storage reference at @a _stackDepthRef.
/// If @a _arrayType is a byte array, takes tight coding into account.
void storeLength(ArrayType const& _arrayType, unsigned _stackDepthLength = 0, unsigned _stackDepthRef = 1) const;
/// Performs bounds checking and returns a reference on the stack.
/// Stack pre: reference [length] index
/// Stack post (storage): storage_slot byte_offset