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`STNumber` lets objects and transactions contain multiple fields for quantities of XRP, IOU, or MPT without duplicating information about the "issue" (represented by `STIssue`). It is a straightforward serialization of the `Number` type that uniformly represents those quantities. --------- Co-authored-by: John Freeman <jfreeman08@gmail.com> Co-authored-by: Howard Hinnant <howard.hinnant@gmail.com>
Basics
Utility functions and classes.
ripple/basic should contain no dependencies on other modules.
Choosing a rippled container.
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std::vector- For ordered containers with most insertions or erases at the end.
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std::deque- For ordered containers with most insertions or erases at the start or end.
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std::list- For ordered containers with inserts and erases to the middle.
- For containers with iterators stable over insert and erase.
- Generally slower and bigger than
std::vectororstd::dequeexcept for those cases.
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std::set- For sorted containers.
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ripple::hash_set- Where inserts and contains need to be O(1).
- For "small" sets,
std::setmight be faster and smaller.
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ripple::hardened_hash_set- For data sets where the key could be manipulated by an attacker in an attempt to mount an algorithmic complexity attack: see http://en.wikipedia.org/wiki/Algorithmic_complexity_attack
The following container is deprecated
std::unordered_set- Use
ripple::hash_setinstead, which uses a better hashing algorithm. - Or use
ripple::hardened_hash_setto prevent algorithmic complexity attacks.