myvtm/Module/mod_download/download.h

#pragma once

#include <array.h>
#include <locale>
#include <codecvt> 
#include <string>

//GBK转UTF码类
class chs_codecvt : public std::codecvt_byname<wchar_t, char, std::mbstate_t> {
public:
	//因不同平台，名称不同，故这里做转换，统一取出不同平台下面的GBK码
#ifdef RVC_OS_WIN
	chs_codecvt() : codecvt_byname("chs") { }//zh_CN.GBK or .936
#else
	chs_codecvt() : codecvt_byname("zh_CN.GBK") { }
#endif // RVC_OS_WIN
};



typedef struct download_file_t {
	//char name[64];
	char name[256];
	int length;
	//char md5[16];
	char md5[32];
}download_file_t;

// xml must be have <?xml version="1.0" encoding="utf-8" ?>
array_header_t* download_parse_filelist(const char *xml, int n);
void download_free_filelist(array_header_t* arr);
//int download_check_filelist(const char *base_dir, array_header_t* arr);

//0：表示下载的文件在文件列表里不存在 1：需要下载 2：下载完成
int new_download_check_filelist(const char *base_dir, array_header_t* arr,download_file_t *downloadFile);
//0：删除失败，1删除成功
int download_delete_file(const char *base_dir,download_file_t *downloadFile);


typedef struct download_storage_t {
	char temp_path[MAX_PATH];
	char info_path[MAX_PATH];
#ifdef RVC_OS_WIN
	HANDLE temp_handle;
	HANDLE info_handle;
#else
	FILE* temp_handle;
	FILE* info_handle;
#endif 
	int offset_block_id;
	int length;
}download_storage_t;

//null表示开打失败，否则打开成功
download_storage_t *download_storage_open(const char *base_dir, download_file_t *file);
void download_storage_close(download_storage_t *storage,bool renameFlag,bool deleteFlag);
int download_storage_update(download_storage_t *storage, char *buf, int n);
//0：md5一致，1,2不一致
int download_check_MD5(download_storage_t *storage,download_file_t *dfile);

//int download_get_storage_block_id(const char *base_dir, download_file_t *file, int *block_id);