hashlag/chaos
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Add stepsCount parameter to private Arc4Gen::Step(), avoiding unnecessary function calls when possible.

Browse Source
This commit is contained in:
hashlag
2025-09-04 22:48:49 +03:00
parent 177b6ab1e8
commit e309ed5c28
1 changed files with 9 additions and 10 deletions
Download Patch File Download Diff File Expand all files Collapse all files

13
Chaos/Cipher/Arc4/Arc4Gen.hpp
View File

@@ -36,7 +36,7 @@ public:
for (uint64_t cnt = 0; cnt < bytesCount; ++cnt) for (uint64_t cnt = 0; cnt < bytesCount; ++cnt)
{ {
Step(); Step(1);
*out++ = Lookup_[static_cast<uint8_t>(Lookup_[I_] + Lookup_[J_])]; *out++ = Lookup_[static_cast<uint8_t>(Lookup_[I_] + Lookup_[J_])];
} }
} }
@@ -44,11 +44,7 @@ public:
void Drop(uint64_t bytesCount) void Drop(uint64_t bytesCount)
{ {
EnsureInitialized(); EnsureInitialized();
Step(bytesCount);
for (uint64_t cnt = 0; cnt < bytesCount; ++cnt)
{
Step();
}
} }
private: private:
@@ -98,13 +94,16 @@ private:
IsInitialized_ = true; IsInitialized_ = true;
} }
void Step() void Step(uint64_t stepsCount)
{
for (uint64_t k = 0; k < stepsCount; ++k)
{ {
I_ = I_ + 1; I_ = I_ + 1;
J_ = J_ + Lookup_[I_]; J_ = J_ + Lookup_[I_];
std::swap(Lookup_[I_], Lookup_[J_]); std::swap(Lookup_[I_], Lookup_[J_]);
} }
}
}; };
} // namespace Chaos::Cipher::Arc4 } // namespace Chaos::Cipher::Arc4