Differential D17300 Diff 51435 src/script/script.h

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src/script/script.h

Show First 20 Lines • Show All 219 Lines • ▼ Show 20 Lines	class CScriptNum {
* integers. The semantics are subtle, though: operands must be in the range		* integers. The semantics are subtle, though: operands must be in the range
* [-2^31 +1...2^31 -1], but results may overflow (and are valid as long as		* [-2^31 +1...2^31 -1], but results may overflow (and are valid as long as
* they are not used in a subsequent numeric operation). CScriptNum enforces		* they are not used in a subsequent numeric operation). CScriptNum enforces
* those semantics by storing results as an int64 and allowing out-of-range		* those semantics by storing results as an int64 and allowing out-of-range
* values to be returned as a vector of bytes but throwing an exception if		* values to be returned as a vector of bytes but throwing an exception if
* arithmetic is done or the result is interpreted as an integer.		* arithmetic is done or the result is interpreted as an integer.
*/		*/
public:		public:
static constexpr size_t MAXIMUM_ELEMENT_SIZE = 4;		static constexpr size_t MAXIMUM_ELEMENT_SIZE_32_BIT = 4;
		static constexpr size_t MAXIMUM_ELEMENT_SIZE_64_BIT = 8;

explicit CScriptNum(const int64_t &n) { m_value = n; }		explicit CScriptNum(const int64_t &n) { m_value = n; }

explicit CScriptNum(const std::vector<uint8_t> &vch, bool fRequireMinimal,		explicit CScriptNum(const std::vector<uint8_t> &vch, bool fRequireMinimal,
const size_t nMaxNumSize) {		const size_t nMaxNumSize) {
if (vch.size() > nMaxNumSize) {		if (vch.size() > nMaxNumSize) {
throw scriptnum_error("script number overflow");		throw scriptnum_error("script number overflow");
}		}
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