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Decompile fn_19326 (Replay::WriteSection)

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Batch #13978 by eAthena: 0 byte-identical, 1 confirmed by peer review.

- fn_19326 Replay::WriteSection: logic confirmed by peer review

Peer-reviewed-by: Yommy, SapitoSucio, aDw
Accepted without human review: peers confirmed the logic ("same" ahead by at least 3, with 70% of the votes).
This commit is contained in:
ragnarok-clanker 2026-11-07 03:59:16 +00:00
commit 026bec89d0
1 changed files with 25 additions and 12 deletions
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37
Source/Client/Replay.cpp
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@ -60,6 +60,12 @@ std::vector<unsigned char> BuildReplayTaggedRecord(std::uint16_t id, const void*
return record;
}
// INLINED
static void AppendReplayRecord(std::vector<unsigned char>& records, std::uint16_t id, const void* data, std::uint32_t bytes) {
const auto record = BuildReplayTaggedRecord(id, data, bytes);
records.insert(records.end(), record.begin(), record.end());
}
// OFFSET: 0x00E3DBA0
// FUNCTION: fn_24195
std::vector<unsigned char> BuildEntryQueueReplayRecords() {
@ -165,29 +171,36 @@ bool Replay::WriteSection(int id, std::vector<unsigned char>& bytes, int event)
if (bytes.empty()) {
return false;
}
if (id <= 0 || id >= 26 || bytes.size() == 0 || bytes.data() == nullptr) {
const std::uint32_t size = static_cast<std::uint32_t>(bytes.size());
unsigned char* data = bytes.data();
if (id <= 0 || id >= 26 || size == 0 || data == nullptr) {
return false;
}
ReplaySection& section = this->sections[id];
if (event == 14) {
section.id = static_cast<std::uint16_t>(id);
section.bytes = bytes.size();
section.fileOffset = this->fileOffset;
this->fileOffset += bytes.size();
this->sections[id].id = static_cast<std::uint16_t>(id);
this->sections[id].bytes = size;
this->sections[id].fileOffset = this->fileOffset;
this->fileOffset += size;
}
const ReplaySection& section = this->sections[id];
if (section.bytes != 0) {
auto* words = reinterpret_cast<std::uint32_t*>(data);
this->cipherBase = this->header.key0 >> 5;
const int count = section.bytes / 4;
this->cipherIndex = 0;
this->cipherKey = this->header.key1 >> 3;
for (std::uint32_t index = 0; index < section.bytes / 4; ++index) {
std::uint32_t word;
std::memcpy(&word, bytes.data() + index * 4, sizeof(word));
word ^= this->cipherKey * (++this->cipherIndex + this->cipherBase);
std::memcpy(bytes.data() + index * 4, &word, sizeof(word));
for (int index = 0; index < count; ++index) {
++this->cipherIndex;
words[index] ^= (this->cipherBase + this->cipherIndex) * this->cipherKey;
}
}
std::fseek(this->file, static_cast<long>(section.fileOffset), SEEK_SET);
return std::fwrite(bytes.data(), section.bytes, 1, this->file) != 0;
return std::fwrite(data, section.bytes, 1, this->file) != 0;
}
// OFFSET: 0x00B857E0