gsd/3rdparty/ZLToolKit/include/Util/File.h

/*
 * Copyright (c) 2016 The ZLToolKit project authors. All Rights Reserved.
 *
 * This file is part of ZLToolKit(https://github.com/ZLMediaKit/ZLToolKit).
 *
 * Use of this source code is governed by MIT license that can be found in the
 * LICENSE file in the root of the source tree. All contributing project authors
 * may be found in the AUTHORS file in the root of the source tree.
 */

#ifndef SRC_UTIL_FILE_H_
#define SRC_UTIL_FILE_H_

#include <cstdio>
#include <cstdlib>
#include <string>
#include "util.h"
#include <functional>

#if defined(__linux__)
#include <limits.h>
#endif

#if defined(_WIN32)
#ifndef PATH_MAX
#define PATH_MAX 1024
#endif // !PATH_MAX

struct dirent{
    long d_ino;              /* inode number*/
    off_t d_off;             /* offset to this dirent*/
    unsigned short d_reclen; /* length of this d_name*/
    unsigned char d_type;    /* the type of d_name*/
    char d_name[1];          /* file name (null-terminated)*/
};
typedef struct _dirdesc {
    int     dd_fd;      /** file descriptor associated with directory */
    long    dd_loc;     /** offset in current buffer */
    long    dd_size;    /** amount of data returned by getdirentries */
    char    *dd_buf;    /** data buffer */
    int     dd_len;     /** size of data buffer */
    long    dd_seek;    /** magic cookie returned by getdirentries */
    HANDLE handle;
    struct dirent *index;
} DIR;
# define __dirfd(dp)    ((dp)->dd_fd)

int mkdir(const char *path, int mode);
DIR *opendir(const char *);
int closedir(DIR *);
struct dirent *readdir(DIR *);

#endif // defined(_WIN32)

#if defined(_WIN32) || defined(_WIN64)
#define fseek64 _fseeki64
#define ftell64 _ftelli64
#else
#define fseek64 fseek
#define ftell64 ftell
#endif

namespace toolkit {

class File {
public:
    //创建路径
    static bool create_path(const char *file, unsigned int mod);

    //新建文件，目录文件夹自动生成
    static FILE *create_file(const char *file, const char *mode);

    //判断是否为目录
    static bool is_dir(const char *path);

    //判断是否是特殊目录（. or ..）
    static bool is_special_dir(const char *path);

    //删除目录或文件
    static int delete_file(const char *path);

    //判断文件是否存在
    static bool fileExist(const char *path);

    /**
     * 加载文件内容至string
     * @param path 加载的文件路径
     * @return 文件内容
     */
    static std::string loadFile(const char *path);

    /**
     * 保存内容至文件
     * @param data 文件内容
     * @param path 保存的文件路径
     * @return 是否保存成功
     */
    static bool saveFile(const std::string &data, const char *path);

    /**
     * 获取父文件夹
     * @param path 路径
     * @return 文件夹
     */
    static std::string parentDir(const std::string &path);

    /**
     * 替换"../"，获取绝对路径
     * @param path 相对路径，里面可能包含 "../"
     * @param current_path 当前目录
     * @param can_access_parent 能否访问父目录之外的目录
     * @return 替换"../"之后的路径
     */
    static std::string absolutePath(const std::string &path, const std::string &current_path, bool can_access_parent = false);

    /**
     * 遍历文件夹下的所有文件
     * @param path 文件夹路径
     * @param cb 回调对象 ，path为绝对路径，isDir为该路径是否为文件夹，返回true代表继续扫描，否则中断
     * @param enter_subdirectory 是否进入子目录扫描
     */
    static void scanDir(const std::string &path, const std::function<bool(const std::string &path, bool isDir)> &cb, bool enter_subdirectory = false);

    /**
     * 获取文件大小
     * @param fp 文件句柄
     * @param remain_size true:获取文件剩余未读数据大小，false:获取文件总大小
     */
    static uint64_t fileSize(FILE *fp, bool remain_size = false);

    /**
     * 获取文件大小
     * @param path 文件路径
     * @return 文件大小
     * @warning 调用者应确保文件存在
     */
    static uint64_t fileSize(const char *path);

private:
    File();
    ~File();
};

} /* namespace toolkit */
#endif /* SRC_UTIL_FILE_H_ */