Differential D1103 Diff 3258 src/script/interpreter.cpp

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src/script/interpreter.cpp

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	stack.push_back(num.getvch());			stack.push_back(num.getvch());
	} break;			} break;

	case OP_NUM2BIN: {			case OP_NUM2BIN: {
	if (!fEnabledOpCodesMonolith) {			if (!fEnabledOpCodesMonolith) {
	// Disabled opcodes.			// Disabled opcodes.
	return set_error(serror, SCRIPT_ERR_DISABLED_OPCODE);			return set_error(serror, SCRIPT_ERR_DISABLED_OPCODE);
	}			}
				// (in size -- out)
				if (stack.size() < 2) {
				return set_error(
				serror, SCRIPT_ERR_INVALID_STACK_OPERATION);
				}
				CScriptNum num(stacktop(-2), fRequireMinimal);
				int64_t size = CScriptNum(stacktop(-1), fRequireMinimal).getint();
				if (size < 1 \|\| static_cast<uint64_t>(size) > CScriptNum::nDefaultMaxNumSize) {
				return set_error(
				serror, SCRIPT_ERR_INVALID_NUM2BIN_OPERATION);
				}
				// Produces a byte vector of num and check if input size
				// is valid
				valtype vchNum = num.getvch();
				if (size < vchNum.size()) {
				return set_error(
				serror, SCRIPT_ERR_INVALID_NUM2BIN_OPERATION);
				}
				// Initialize byte vector for result
				valtype result;
				result.reserve(size);
				bool neg{false};
				// Avoid negative zero
				if (!vchNum.empty()) {
				neg = *vchNum.rbegin() & 0x80;
				*vchNum.rbegin() &= ~0x80;
				}
				// Pad result to declared input size
				size_t pad = size - vchNum.size();
				for (uint8_t i = 0; i < pad; ++i) {
				result.push_back(0);
				}
				for (auto i = vchNum.rbegin(); i != vchNum.rend(); ++i) {
				result.push_back(*i);
				}
				if (neg) *result.begin() \|= 0x80;
				stack.pop_back();
				stack.pop_back();
				stack.push_back(result);
	} break;			} break;

	default:			default:
	return set_error(serror, SCRIPT_ERR_BAD_OPCODE);			return set_error(serror, SCRIPT_ERR_BAD_OPCODE);
	}			}

	// Size limits			// Size limits
	if (stack.size() + altstack.size() > 1000) {			if (stack.size() + altstack.size() > 1000) {
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