Magisk/native/jni/init/raw_data.cpp

#include "raw_data.hpp"

using namespace std;

int data_holder::patch(str_pairs list) {
	if (buf == nullptr)
		return 0;
	int count = 0;
	for (uint8_t *p = buf, *eof = buf + sz; p < eof; ++p) {
		for (auto [from, to] : list) {
			if (memcmp(p, from.data(), from.length() + 1) == 0) {
				LOGD("Replace [%s] -> [%s]\n", from.data(), to.data());
				memset(p, 0, from.length());
				memcpy(p, to.data(), to.length());
				++count;
				p += from.length();
			}
		}
	}
	return count;
}

bool data_holder::contains(string_view pattern) {
	if (buf == nullptr)
		return false;
	for (uint8_t *p = buf, *eof = buf + sz; p < eof; ++p) {
		if (memcmp(p, pattern.data(), pattern.length() + 1) == 0) {
			LOGD("Found pattern [%s]\n", pattern.data());
			return true;
		}
	}
	return false;
}

void data_holder::consume(data_holder &other) {
	buf = other.buf;
	sz = other.sz;
	other.buf = nullptr;
	other.sz = 0;
}

auto_data<HEAP> raw_data::read(int fd) {
	auto_data<HEAP> data;
	fd_full_read(fd, data.buf, data.sz);
	return data;
}

auto_data<HEAP> raw_data::read(const char *name) {
	auto_data<HEAP> data;
	full_read(name, data.buf, data.sz);
	return data;
}

auto_data<MMAP> raw_data::mmap_rw(const char *name) {
	auto_data<MMAP> data;
	::mmap_rw(name, data.buf, data.sz);
	return data;
}

auto_data<MMAP> raw_data::mmap_ro(const char *name) {
	auto_data<MMAP> data;
	::mmap_ro(name, data.buf, data.sz);
	return data;
}