Magisk/native/jni/utils/include/cpio.hpp
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2020-12-30 22:11:24 -08:00

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C++

#pragma once
#include <stdint.h>
#include <string>
#include <memory>
#include <map>
#include <string_view>
#include <stream.hpp>
struct cpio_newc_header;
struct cpio_entry_base {
uint32_t mode = 0;
uint32_t uid = 0;
uint32_t gid = 0;
uint32_t filesize = 0;
void *data = nullptr;
cpio_entry_base() : mode(0), uid(0), gid(0), filesize(0) {};
explicit cpio_entry_base(const cpio_newc_header *h);
virtual ~cpio_entry_base() = default;
};
struct cpio_entry : public cpio_entry_base {
std::string filename;
cpio_entry() = default;
explicit cpio_entry(const char *name, uint32_t mode) : filename(name) {
this->mode = mode;
}
explicit cpio_entry(const cpio_newc_header *h) : cpio_entry_base(h) {}
~cpio_entry() override { free(data); };
};
typedef std::map<std::string_view, std::unique_ptr<cpio_entry_base>> entry_map;
class cpio {
public:
void dump(const char *file);
void rm(const char *name, bool r = false);
void extract();
bool extract(const char *name, const char *file);
bool exists(const char *name);
protected:
entry_map entries;
void rm(entry_map::iterator &it);
void dump(FILE *out);
};
class cpio_rw : public cpio {
public:
cpio_rw() = default;
explicit cpio_rw(const char *file);
void load_cpio(const char *file);
void add(mode_t mode, const char *name, const char *file);
void mkdir(mode_t mode, const char *name);
void ln(const char *target, const char *name);
bool mv(const char *from, const char *to);
protected:
void insert(cpio_entry *e);
void mv(entry_map::iterator &it, const char *to);
void load_cpio(const char *buf, size_t sz);
};
class cpio_mmap : public cpio {
public:
explicit cpio_mmap(const char *file);
~cpio_mmap();
private:
char *buf;
size_t sz;
};