Files
mtgodot-poc/third_party/cryptopp/adler32.cpp
T
shenleiandClaude Opus 5.5 a46093104c layout: restructure into src/ tests/ android/ scripts/ tools/
- extension/src/{port,platform,codepage} -> src/; native_render -> src/host
  (+ dxt, shaders/); libgr2 -> src/gr2; extension/third_party -> third_party
- extension/tests -> tests/port, libgr2/tests -> tests/gr2
- android-native -> android (build.sh, push-client.sh moved in)
- script -> scripts; tools/40250 -> tools/server; oracle -> tools/granny-oracle;
  perf tools -> tools/perf
- all build trees under build/ (native, release, android, port-gate)
- xrender:: CMake aliases -> mt::; port-map ledger impl paths rewritten

No code changes. ctest 15/15, port_gate macos+android PASS, port_map check 0 errors.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-09-29 19:08:19 +09:00

83 lines
1.3 KiB
C++

// adler32.cpp - originally written and placed in the public domain by Wei Dai
#include "pch.h"
#include "adler32.h"
NAMESPACE_BEGIN(CryptoPP)
void Adler32::Update(const byte *input, size_t length)
{
const unsigned long BASE = 65521;
unsigned long s1 = m_s1;
unsigned long s2 = m_s2;
if (length % 8 != 0)
{
do
{
s1 += *input++;
s2 += s1;
length--;
} while (length % 8 != 0);
if (s1 >= BASE)
s1 -= BASE;
s2 %= BASE;
}
while (length > 0)
{
s1 += input[0]; s2 += s1;
s1 += input[1]; s2 += s1;
s1 += input[2]; s2 += s1;
s1 += input[3]; s2 += s1;
s1 += input[4]; s2 += s1;
s1 += input[5]; s2 += s1;
s1 += input[6]; s2 += s1;
s1 += input[7]; s2 += s1;
length -= 8;
input += 8;
if (s1 >= BASE)
s1 -= BASE;
if (length % 0x8000 == 0)
s2 %= BASE;
}
CRYPTOPP_ASSERT(s1 < BASE);
CRYPTOPP_ASSERT(s2 < BASE);
m_s1 = (word16)s1;
m_s2 = (word16)s2;
}
void Adler32::TruncatedFinal(byte *hash, size_t size)
{
ThrowIfInvalidTruncatedSize(size);
switch (size)
{
default:
hash[3] = byte(m_s1);
// fall through
case 3:
hash[2] = byte(m_s1 >> 8);
// fall through
case 2:
hash[1] = byte(m_s2);
// fall through
case 1:
hash[0] = byte(m_s2 >> 8);
// fall through
case 0:
;
// fall through
}
Reset();
}
NAMESPACE_END