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Use raw BattleParam HP offsets for Brutal Peeps patch

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Incentive
2026-06-06 22:18:52 -04:00
parent 672be0b6b8
commit 5feffea722
1 changed files with 37 additions and 33 deletions
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src/SendCommands.cc
+37 -33
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@@ -820,10 +820,32 @@ static std::shared_ptr<AsyncPromise<C_ExecuteCodeResult_B3>> send_brutal_peeps_h
}
const char* vanilla_data = s->bb_stream_file->data.data() + bp_entry->offset;
std::string target_data(vanilla_data, bp_entry->size);
auto* table = reinterpret_cast<BattleParamsIndex::Table*>(target_data.data());
size_t ultimate_index = static_cast<size_t>(Difficulty::ULTIMATE);
constexpr uint32_t scan_start = 0x16760000;
constexpr uint32_t scan_end = 0x16A90000;
constexpr uint32_t signature_size = 64;
// Raw BattleParamEntry*.dat layout:
// Ultimate stats HP starts at 0x2886 and each stats row is 0x24 bytes.
constexpr uint32_t ultimate_hp_base_offset = 0x00002886;
constexpr uint32_t stats_row_size = 0x24;
constexpr uint32_t num_bp_rows = 0x60;
if (bp_entry->size < signature_size) {
c->log.warning_f("Skipping Brutal Peeps HP client patch: BattleParamEntry_on.dat too small for signature");
return nullptr;
}
if (bp_entry->size < (ultimate_hp_base_offset + ((num_bp_rows - 1) * stats_row_size) + 2)) {
c->log.warning_f("Skipping Brutal Peeps HP client patch: BattleParamEntry_on.dat too small for Ultimate HP table");
return nullptr;
}
auto append_u32l = +[](std::string& out, uint32_t v) {
out.push_back(static_cast<char>(v & 0xFF));
out.push_back(static_cast<char>((v >> 8) & 0xFF));
out.push_back(static_cast<char>((v >> 16) & 0xFF));
out.push_back(static_cast<char>((v >> 24) & 0xFF));
};
auto scale_u16 = [mult](uint32_t v) -> uint16_t {
if (v == 0) {
@@ -839,44 +861,26 @@ static std::shared_ptr<AsyncPromise<C_ExecuteCodeResult_B3>> send_brutal_peeps_h
return static_cast<uint16_t>(scaled);
};
for (size_t z = 0; z < 0x60; z++) {
auto& stats = table->stats[ultimate_index][z];
stats.char_stats.hp = scale_u16(stats.char_stats.hp);
}
constexpr uint32_t scan_start = 0x16760000;
constexpr uint32_t scan_end = 0x16A90000;
constexpr uint32_t signature_size = 64;
if (bp_entry->size < signature_size) {
c->log.warning_f("Skipping Brutal Peeps HP client patch: BattleParamEntry_on.dat too small for signature");
return nullptr;
}
auto append_u32l = +[](std::string& out, uint32_t v) {
out.push_back(static_cast<char>(v & 0xFF));
out.push_back(static_cast<char>((v >> 8) & 0xFF));
out.push_back(static_cast<char>((v >> 16) & 0xFF));
out.push_back(static_cast<char>((v >> 24) & 0xFF));
};
std::string suffix;
append_u32l(suffix, scan_start);
append_u32l(suffix, scan_end);
append_u32l(suffix, signature_size);
append_u32l(suffix, 0); // patched below after diff generation
append_u32l(suffix, 0); // patched below after HP patch generation
suffix.append(vanilla_data, signature_size);
uint32_t patch_entry_count = 0;
for (uint32_t offset = 0; offset < target_data.size(); offset++) {
uint8_t old_byte = static_cast<uint8_t>(vanilla_data[offset]);
uint8_t new_byte = static_cast<uint8_t>(target_data[offset]);
if (old_byte == new_byte) {
continue;
}
for (uint32_t z = 0; z < num_bp_rows; z++) {
uint32_t hp_offset = ultimate_hp_base_offset + (z * stats_row_size);
uint16_t old_hp = static_cast<uint8_t>(vanilla_data[hp_offset]) |
(static_cast<uint16_t>(static_cast<uint8_t>(vanilla_data[hp_offset + 1])) << 8);
uint16_t new_hp = scale_u16(old_hp);
append_u32l(suffix, offset);
suffix.push_back(static_cast<char>(new_byte));
append_u32l(suffix, hp_offset);
suffix.push_back(static_cast<char>(new_hp & 0xFF));
patch_entry_count++;
append_u32l(suffix, hp_offset + 1);
suffix.push_back(static_cast<char>((new_hp >> 8) & 0xFF));
patch_entry_count++;
}