Move CPIO to libutils

native/jni/utils/include/cpio.h

@@ -0,0 +1,83 @@
+#pragma once
+
+#include <stdint.h>
+#include <string>
+#include <memory>
+#include <map>
+#include <string_view>
+
+struct cpio_newc_header {
+	char magic[6];
+	char ino[8];
+	char mode[8];
+	char uid[8];
+	char gid[8];
+	char nlink[8];
+	char mtime[8];
+	char filesize[8];
+	char devmajor[8];
+	char devminor[8];
+	char rdevmajor[8];
+	char rdevminor[8];
+	char namesize[8];
+	char check[8];
+} __attribute__((packed));
+
+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) : filename(name) {}
+	cpio_entry(int fd, cpio_newc_header &header);
+	~cpio_entry() override;
+};
+
+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);
+};
+
+class cpio_rw : public cpio {
+public:
+	explicit cpio_rw(const char *filename);
+	void insert(cpio_entry *e);
+	void add(mode_t mode, const char *name, const char *file);
+	void makedir(mode_t mode, const char *name);
+	void ln(const char *target, const char *name);
+	bool mv(const char *from, const char *to);
+
+protected:
+	void mv(entry_map::iterator &it, const char *to);
+};
+
+class cpio_mmap : public cpio {
+public:
+	explicit cpio_mmap(const char *filename);
+	~cpio_mmap();
+private:
+	char *buf;
+	size_t sz;
+};