#pragma once
#include <stddef.h>
#include <stdint.h>

#ifdef __cplusplus
extern "C" {
#endif

#ifdef _MSC_VER
#ifdef LIBFILECRYPTION_EXPORTS
#define FILECRYPTION_API(type)	_declspec(dllexport) type 
#else
#define FILECRYPTION_API(type)	_declspec(dllimport) type
#endif
# elif ( defined(__GNUC__) &&  __GNUC__ >= 4 )
#define FILECRYPTION_API(type)	__attribute__((visibility("default"))) type
#else 
#define FILECRYPTION_API(type)
#endif

#ifndef RVC_FILEENC_STR
#define RVC_FILEENC_STR "enc_"
#endif

#ifndef RVC_FILEDEC_STR
#define RVC_FILEDEC_STR "dec_"
#endif

//加密算法版本
enum eRvcCryptionVersion{
	eVerA,
	eVerB,
	eVerC,
	eVerD
};

enum filecrypt_loglevel {
	FILECRYPT_LEVEL_DEBUG,
	FILECRYPT_LEVEL_INFO,
	FILECRYPT_LEVEL_WARN,
	FILECRYPT_LEVEL_ERROR,
	FILECRYPT_LEVEL_FATAL
};

typedef struct filecryption_callback_s  {
	void (*oncryptionexception)(void *user_data);
	void (*oncryptionfinished)(void *user_data);
	void (*dbg)(filecrypt_loglevel elevel, const char* fmt, ...);
}filecryption_callback_t;


#ifndef safe_log
#define safe_log(x, elevel, strformat, ...) \
		do{\
			if (x && x->dbg){ x->dbg(elevel, strformat, ##__VA_ARGS__);}\
		}while(0)
#endif


FILECRYPTION_API(int) encryption_file(char* poutfile, uint32_t uoutlen, const char* pfilename, const filecryption_callback_t* pcallback, eRvcCryptionVersion eversion);
FILECRYPTION_API(int) decryption_file(char* poutfile, uint32_t uoutlen, const char* pfilename, const filecryption_callback_t* pcallback = NULL, eRvcCryptionVersion eversion = eVerA);
FILECRYPTION_API(bool) is_file_encrypted(const char* pfilename, const filecryption_callback_t* pcallback);
FILECRYPTION_API(int) rvc_file_decrypt(unsigned char** pdechead, uint32_t* udecheadlen, int* ioffset, char** pstrjson, uint32_t* ujsonlen,const char* pfilename, const filecryption_callback_t* pcallback = NULL, eRvcCryptionVersion eversion = eVerA);
FILECRYPTION_API(int) rvc_free_data(void** pdechead);
FILECRYPTION_API(bool) is_file_completed(const char* pfilename, const filecryption_callback_t* pcallback);
FILECRYPTION_API(int) get_file_sm3digest(char* strbuf, uint32_t ubuflen, const char* pfilename);

#ifdef __cplusplus
} // extern "C" {
#endif