精华内容
下载资源
问答
  • dirent.h头文件

    2017-11-02 10:04:53
    <dirent.h>是一个应用程序接口,主要用于文件系统的目录读取操作,主要提供了几个目录数据读取函数,参见opengroup.org<dirent.h> int closedir(DIR *);//关闭目录 DIR *opendir(const char *);//打开目录 struct ...
  • dirent.h 头文件

    2019-09-29 20:41:47
    解决vs工程报错“无法打开包括文件:“dirent.h””,将该文件复制在工程目录下,或者直接复制在 (vs库目录) 例如我的目录:C:\Program Files (x86)\Microsoft Visual Studio 14.0\VC\include
  • dirent.h,用于读取文件的头文件,相当于Linux的移植版
  • windows 下 dirent 头文件

    2017-02-26 16:45:04
    windows 下 dirent 头文件
  • 适用于VS2010、vs2013开发的dirent.h头文件,下载解压可以直接提取头文件。
  • Dirent是C / C ++编程接口,允许程序员在Linux / UNIX下检索有关文件和目录的信息。 该项目为Microsoft Windows提供了Linux兼容的Dirent接口。 安装 从下载最新的Dirent安装包,然后使用7-zip解压缩安装文件。 安装...
  • dirent-master.zip

    2019-10-13 12:56:01
    提供支持windows系统下支持vs的目录调用头函数,亲测有效。
  • dirent用于缺少此类头文件,当文件编辑缺少此类文件,下载解压到相关目录。
  • 在使用的时候需要包含这个头文件dirent.h,在文章最后会附上 1,dirent结构体: struct dirent { long d_ino; /* Always zero */ unsigned short d_reclen; /* Structure size */ size_t d_namlen; /* Length of...

    在使用的时候需要包含这个头文件dirent.h,在文章最后会附上
    1,dirent结构体:

        struct dirent {
            long d_ino;     /* Always zero */
            unsigned short d_reclen;  /* Structure size */
            size_t d_namlen;    /* Length of name without \0 */
            int d_type;   /* File type */
            char d_name[PATH_MAX];     /* File name */
        };
        typedef struct dirent dirent;
    

    2,DIR:
    A type representing a directory stream.

    struct DIR {
            struct dirent ent;
            struct _WDIR *wdirp;
        };
        typedef struct DIR DIR;
    
    

    3,一些函数:

    int closedir(DIR *);
    DIR *opendir(const char *);
    struct dirent *readdir(DIR *);
    int readdir_r(DIR *, struct dirent *, struct dirent **);
    void rewinddir(DIR *);
    void seekdir(DIR *, long int);
    long int telldir(DIR *);
    

    4,使用dirent
    删除文件夹下所有文件:

    DIR *foder = opendir(file_path_to_delete.c_str());
        struct dirent *next_file;
        char filepath[256];
    
        while ((next_file = readdir(foder)) != NULL)
        {
            // build the path for each file in the folder
            sprintf(filepath, "%s/%s", course_path.c_str(), next_file->d_name);
            remove(filepath);
        }
    

    5,注意:
    路径要以’/’结尾:

    file_path_to_delete += "\/";
    
    

    6,判断目录是否存在:

     DIR *mydir = NULL;  
        if((mydir= opendir(dir))==NULL)//判断目录   
        {  
          int ret = mkdir(dir, MODE);//创建目录  
          if (ret != 0)  
          {  
              return -1;  
          }  
          printf("%s created sucess!/n", dir);  
        }  
    

    7,判断是文件夹还是文件:

    unsigned char isFile =0x8;
    DIR Dir;
    struct dirent *DirEntry;
    Dir = opendir("c:/test/")
    
    while(Dir=readdir(Dir))
    {
       if ( DirEntry->d_type == isFile)
       {
        cout <<"Found a File : " << DirEntry->d_name << endl;
       }
    }
    

    8,//dirent.h

    /*
    * dirent.h - dirent API for Microsoft Visual Studio
    *
    * Copyright (C) 2006-2012 Toni Ronkko
    *
    * Permission is hereby granted, free of charge, to any person obtaining
    * a copy of this software and associated documentation files (the
    * ``Software''), to deal in the Software without restriction, including
    * without limitation the rights to use, copy, modify, merge, publish,
    * distribute, sublicense, and/or sell copies of the Software, and to
    * permit persons to whom the Software is furnished to do so, subject to
    * the following conditions:
    *
    * The above copyright notice and this permission notice shall be included
    * in all copies or substantial portions of the Software.
    *
    * THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS
    * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
    * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
    * IN NO EVENT SHALL TONI RONKKO BE LIABLE FOR ANY CLAIM, DAMAGES OR
    * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
    * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
    * OTHER DEALINGS IN THE SOFTWARE.
    *
    * $Id: dirent.h,v 1.20 2014/03/19 17:52:23 tronkko Exp $
    */
    #ifndef DIRENT_H
    #define DIRENT_H
    
    /*
    * Define architecture flags so we don't need to include windows.h.
    * Avoiding windows.h makes it simpler to use windows sockets in conjunction
    * with dirent.h.
    */
    #if !defined(_68K_) && !defined(_MPPC_) && !defined(_X86_) && !defined(_IA64_) && !defined(_AMD64_) && defined(_M_IX86)
    #   define _X86_
    #endif
    #if !defined(_68K_) && !defined(_MPPC_) && !defined(_X86_) && !defined(_IA64_) && !defined(_AMD64_) && defined(_M_AMD64)
    #define _AMD64_
    #endif
    
    #include <stdio.h>
    #include <stdarg.h>
    #include <windef.h>
    #include <winbase.h>
    #include <wchar.h>
    #include <string.h>
    #include <stdlib.h>
    #include <malloc.h>
    #include <sys/types.h>
    #include <sys/stat.h>
    #include <errno.h>
    
    /* Indicates that d_type field is available in dirent structure */
    #define _DIRENT_HAVE_D_TYPE
    
    /* Indicates that d_namlen field is available in dirent structure */
    #define _DIRENT_HAVE_D_NAMLEN
    
    /* Entries missing from MSVC 6.0 */
    #if !defined(FILE_ATTRIBUTE_DEVICE)
    #   define FILE_ATTRIBUTE_DEVICE 0x40
    #endif
    
    /* File type and permission flags for stat() */
    #if !defined(S_IFMT)
    #   define S_IFMT   _S_IFMT                     /* File type mask */
    #endif
    #if !defined(S_IFDIR)
    #   define S_IFDIR  _S_IFDIR                    /* Directory */
    #endif
    #if !defined(S_IFCHR)
    #   define S_IFCHR  _S_IFCHR                    /* Character device */
    #endif
    #if !defined(S_IFFIFO)
    #   define S_IFFIFO _S_IFFIFO                   /* Pipe */
    #endif
    #if !defined(S_IFREG)
    #   define S_IFREG  _S_IFREG                    /* Regular file */
    #endif
    #if !defined(S_IREAD)
    #   define S_IREAD  _S_IREAD                    /* Read permission */
    #endif
    #if !defined(S_IWRITE)
    #   define S_IWRITE _S_IWRITE                   /* Write permission */
    #endif
    #if !defined(S_IEXEC)
    #   define S_IEXEC  _S_IEXEC                    /* Execute permission */
    #endif
    #if !defined(S_IFIFO)
    #   define S_IFIFO _S_IFIFO                     /* Pipe */
    #endif
    #if !defined(S_IFBLK)
    #   define S_IFBLK   0                          /* Block device */
    #endif
    #if !defined(S_IFLNK)
    #   define S_IFLNK   0                          /* Link */
    #endif
    #if !defined(S_IFSOCK)
    #   define S_IFSOCK  0                          /* Socket */
    #endif
    
    #if defined(_MSC_VER)
    #   define S_IRUSR  S_IREAD                     /* Read user */
    #   define S_IWUSR  S_IWRITE                    /* Write user */
    #   define S_IXUSR  0                           /* Execute user */
    #   define S_IRGRP  0                           /* Read group */
    #   define S_IWGRP  0                           /* Write group */
    #   define S_IXGRP  0                           /* Execute group */
    #   define S_IROTH  0                           /* Read others */
    #   define S_IWOTH  0                           /* Write others */
    #   define S_IXOTH  0                           /* Execute others */
    #endif
    
    /* Maximum length of file name */
    #if !defined(PATH_MAX)
    #   define PATH_MAX MAX_PATH
    #endif
    #if !defined(FILENAME_MAX)
    #   define FILENAME_MAX MAX_PATH
    #endif
    #if !defined(NAME_MAX)
    #   define NAME_MAX FILENAME_MAX
    #endif
    
    /* File type flags for d_type */
    #define DT_UNKNOWN  0
    #define DT_REG      S_IFREG
    #define DT_DIR      S_IFDIR
    #define DT_FIFO     S_IFIFO
    #define DT_SOCK     S_IFSOCK
    #define DT_CHR      S_IFCHR
    #define DT_BLK      S_IFBLK
    #define DT_LNK      S_IFLNK
    
    /* Macros for converting between st_mode and d_type */
    #define IFTODT(mode) ((mode) & S_IFMT)
    #define DTTOIF(type) (type)
    
    /*
    * File type macros.  Note that block devices, sockets and links cannot be
    * distinguished on Windows and the macros S_ISBLK, S_ISSOCK and S_ISLNK are
    * only defined for compatibility.  These macros should always return false
    * on Windows.
    */
    #define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)
    #define S_ISDIR(mode)  (((mode) & S_IFMT) == S_IFDIR)
    #define S_ISREG(mode)  (((mode) & S_IFMT) == S_IFREG)
    #define S_ISLNK(mode)  (((mode) & S_IFMT) == S_IFLNK)
    #define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
    #define S_ISCHR(mode)  (((mode) & S_IFMT) == S_IFCHR)
    #define S_ISBLK(mode)  (((mode) & S_IFMT) == S_IFBLK)
    
    /* Return the exact length of d_namlen without zero terminator */
    #define _D_EXACT_NAMLEN(p) ((p)->d_namlen)
    
    /* Return number of bytes needed to store d_namlen */
    #define _D_ALLOC_NAMLEN(p) (PATH_MAX)
    
    
    #ifdef __cplusplus
    extern "C" {
    #endif
    
    
        /* Wide-character version */
        struct _wdirent {
            long d_ino;                                 /* Always zero */
            unsigned short d_reclen;                    /* Structure size */
            size_t d_namlen;                            /* Length of name without \0 */
            int d_type;                                 /* File type */
            wchar_t d_name[PATH_MAX];                   /* File name */
        };
        typedef struct _wdirent _wdirent;
    
        struct _WDIR {
            struct _wdirent ent;                        /* Current directory entry */
            WIN32_FIND_DATAW data;                      /* Private file data */
            int cached;                                 /* True if data is valid */
            HANDLE handle;                              /* Win32 search handle */
            wchar_t *patt;                              /* Initial directory name */
        };
        typedef struct _WDIR _WDIR;
    
        static _WDIR *_wopendir(const wchar_t *dirname);
        static struct _wdirent *_wreaddir(_WDIR *dirp);
        static int _wclosedir(_WDIR *dirp);
        static void _wrewinddir(_WDIR* dirp);
    
    
        /* For compatibility with Symbian */
    #define wdirent _wdirent
    #define WDIR _WDIR
    #define wopendir _wopendir
    #define wreaddir _wreaddir
    #define wclosedir _wclosedir
    #define wrewinddir _wrewinddir
    
    
        /* Multi-byte character versions */
        struct dirent {
            long d_ino;                                 /* Always zero */
            unsigned short d_reclen;                    /* Structure size */
            size_t d_namlen;                            /* Length of name without \0 */
            int d_type;                                 /* File type */
            char d_name[PATH_MAX];                      /* File name */
        };
        typedef struct dirent dirent;
    
        struct DIR {
            struct dirent ent;
            struct _WDIR *wdirp;
        };
        typedef struct DIR DIR;
    
        static DIR *opendir(const char *dirname);
        static struct dirent *readdir(DIR *dirp);
        static int closedir(DIR *dirp);
        static void rewinddir(DIR* dirp);
    
    
        /* Internal utility functions */
        static WIN32_FIND_DATAW *dirent_first(_WDIR *dirp);
        static WIN32_FIND_DATAW *dirent_next(_WDIR *dirp);
    
        static int dirent_mbstowcs_s(
            size_t *pReturnValue,
            wchar_t *wcstr,
            size_t sizeInWords,
            const char *mbstr,
            size_t count);
    
        static int dirent_wcstombs_s(
            size_t *pReturnValue,
            char *mbstr,
            size_t sizeInBytes,
            const wchar_t *wcstr,
            size_t count);
    
        static void dirent_set_errno(int error);
    
        /*
        * Open directory stream DIRNAME for read and return a pointer to the
        * internal working area that is used to retrieve individual directory
        * entries.
        */
        static _WDIR*
            _wopendir(
            const wchar_t *dirname)
        {
            _WDIR *dirp = NULL;
            int error;
    
            /* Must have directory name */
            if (dirname == NULL || dirname[0] == '\0') {
                dirent_set_errno(ENOENT);
                return NULL;
            }
    
            /* Allocate new _WDIR structure */
            dirp = (_WDIR*)malloc(sizeof(struct _WDIR));
            if (dirp != NULL) {
                DWORD n;
    
                /* Reset _WDIR structure */
                dirp->handle = INVALID_HANDLE_VALUE;
                dirp->patt = NULL;
                dirp->cached = 0;
    
                /* Compute the length of full path plus zero terminator */
                n = GetFullPathNameW(dirname, 0, NULL, NULL);
    
                /* Allocate room for absolute directory name and search pattern */
                dirp->patt = (wchar_t*)malloc(sizeof(wchar_t) * n + 16);
                if (dirp->patt) {
    
                    /*
                    * Convert relative directory name to an absolute one.  This
                    * allows rewinddir() to function correctly even when current
                    * working directory is changed between opendir() and rewinddir().
                    */
                    n = GetFullPathNameW(dirname, n, dirp->patt, NULL);
                    if (n > 0) {
                        wchar_t *p;
    
                        /* Append search pattern \* to the directory name */
                        p = dirp->patt + n;
                        if (dirp->patt < p) {
                            switch (p[-1]) {
                            case '\\':
                            case '/':
                            case ':':
                                /* Directory ends in path separator, e.g. c:\temp\ */
                                /*NOP*/;
                                break;
    
                            default:
                                /* Directory name doesn't end in path separator */
                                *p++ = '\\';
                            }
                        }
                        *p++ = '*';
                        *p = '\0';
    
                        /* Open directory stream and retrieve the first entry */
                        if (dirent_first(dirp)) {
                            /* Directory stream opened successfully */
                            error = 0;
                        }
                        else {
                            /* Cannot retrieve first entry */
                            error = 1;
                            dirent_set_errno(ENOENT);
                        }
    
                    }
                    else {
                        /* Cannot retrieve full path name */
                        dirent_set_errno(ENOENT);
                        error = 1;
                    }
    
                }
                else {
                    /* Cannot allocate memory for search pattern */
                    error = 1;
                }
    
            }
            else {
                /* Cannot allocate _WDIR structure */
                error = 1;
            }
    
            /* Clean up in case of error */
            if (error  &&  dirp) {
                _wclosedir(dirp);
                dirp = NULL;
            }
    
            return dirp;
        }
    
        /*
        * Read next directory entry.  The directory entry is returned in dirent
        * structure in the d_name field.  Individual directory entries returned by
        * this function include regular files, sub-directories, pseudo-directories
        * "." and ".." as well as volume labels, hidden files and system files.
        */
        static struct _wdirent*
            _wreaddir(
            _WDIR *dirp)
        {
            WIN32_FIND_DATAW *datap;
            struct _wdirent *entp;
    
            /* Read next directory entry */
            datap = dirent_next(dirp);
            if (datap) {
                size_t n;
                DWORD attr;
    
                /* Pointer to directory entry to return */
                entp = &dirp->ent;
    
                /*
                * Copy file name as wide-character string.  If the file name is too
                * long to fit in to the destination buffer, then truncate file name
                * to PATH_MAX characters and zero-terminate the buffer.
                */
                n = 0;
                while (n + 1 < PATH_MAX  &&  datap->cFileName[n] != 0) {
                    entp->d_name[n] = datap->cFileName[n];
                    n++;
                }
                dirp->ent.d_name[n] = 0;
    
                /* Length of file name excluding zero terminator */
                entp->d_namlen = n;
    
                /* File type */
                attr = datap->dwFileAttributes;
                if ((attr & FILE_ATTRIBUTE_DEVICE) != 0) {
                    entp->d_type = DT_CHR;
                }
                else if ((attr & FILE_ATTRIBUTE_DIRECTORY) != 0) {
                    entp->d_type = DT_DIR;
                }
                else {
                    entp->d_type = DT_REG;
                }
    
                /* Reset dummy fields */
                entp->d_ino = 0;
                entp->d_reclen = sizeof(struct _wdirent);
    
            }
            else {
    
                /* Last directory entry read */
                entp = NULL;
    
            }
    
            return entp;
        }
    
        /*
        * Close directory stream opened by opendir() function.  This invalidates the
        * DIR structure as well as any directory entry read previously by
        * _wreaddir().
        */
        static int
            _wclosedir(
            _WDIR *dirp)
        {
            int ok;
            if (dirp) {
    
                /* Release search handle */
                if (dirp->handle != INVALID_HANDLE_VALUE) {
                    FindClose(dirp->handle);
                    dirp->handle = INVALID_HANDLE_VALUE;
                }
    
                /* Release search pattern */
                if (dirp->patt) {
                    free(dirp->patt);
                    dirp->patt = NULL;
                }
    
                /* Release directory structure */
                free(dirp);
                ok = /*success*/0;
    
            }
            else {
                /* Invalid directory stream */
                dirent_set_errno(EBADF);
                ok = /*failure*/-1;
            }
            return ok;
        }
    
        /*
        * Rewind directory stream such that _wreaddir() returns the very first
        * file name again.
        */
        static void
            _wrewinddir(
            _WDIR* dirp)
        {
            if (dirp) {
                /* Release existing search handle */
                if (dirp->handle != INVALID_HANDLE_VALUE) {
                    FindClose(dirp->handle);
                }
    
                /* Open new search handle */
                dirent_first(dirp);
            }
        }
    
        /* Get first directory entry (internal) */
        static WIN32_FIND_DATAW*
            dirent_first(
            _WDIR *dirp)
        {
            WIN32_FIND_DATAW *datap;
    
            /* Open directory and retrieve the first entry */
            dirp->handle = FindFirstFileW(dirp->patt, &dirp->data);
            if (dirp->handle != INVALID_HANDLE_VALUE) {
    
                /* a directory entry is now waiting in memory */
                datap = &dirp->data;
                dirp->cached = 1;
    
            }
            else {
    
                /* Failed to re-open directory: no directory entry in memory */
                dirp->cached = 0;
                datap = NULL;
    
            }
            return datap;
        }
    
        /* Get next directory entry (internal) */
        static WIN32_FIND_DATAW*
            dirent_next(
            _WDIR *dirp)
        {
            WIN32_FIND_DATAW *p;
    
            /* Get next directory entry */
            if (dirp->cached != 0) {
    
                /* A valid directory entry already in memory */
                p = &dirp->data;
                dirp->cached = 0;
    
            }
            else if (dirp->handle != INVALID_HANDLE_VALUE) {
    
                /* Get the next directory entry from stream */
                if (FindNextFileW(dirp->handle, &dirp->data) != FALSE) {
                    /* Got a file */
                    p = &dirp->data;
                }
                else {
                    /* The very last entry has been processed or an error occured */
                    FindClose(dirp->handle);
                    dirp->handle = INVALID_HANDLE_VALUE;
                    p = NULL;
                }
    
            }
            else {
    
                /* End of directory stream reached */
                p = NULL;
    
            }
    
            return p;
        }
    
        /*
        * Open directory stream using plain old C-string.
        */
        static DIR*
            opendir(
            const char *dirname)
        {
            struct DIR *dirp;
            int error;
    
            /* Must have directory name */
            if (dirname == NULL || dirname[0] == '\0') {
                dirent_set_errno(ENOENT);
                return NULL;
            }
    
            /* Allocate memory for DIR structure */
            dirp = (DIR*)malloc(sizeof(struct DIR));
            if (dirp) {
                wchar_t wname[PATH_MAX];
                size_t n;
    
                /* Convert directory name to wide-character string */
                error = dirent_mbstowcs_s(&n, wname, PATH_MAX, dirname, PATH_MAX);
                if (!error) {
    
                    /* Open directory stream using wide-character name */
                    dirp->wdirp = _wopendir(wname);
                    if (dirp->wdirp) {
                        /* Directory stream opened */
                        error = 0;
                    }
                    else {
                        /* Failed to open directory stream */
                        error = 1;
                    }
    
                }
                else {
                    /*
                    * Cannot convert file name to wide-character string.  This
                    * occurs if the string contains invalid multi-byte sequences or
                    * the output buffer is too small to contain the resulting
                    * string.
                    */
                    error = 1;
                }
    
            }
            else {
                /* Cannot allocate DIR structure */
                error = 1;
            }
    
            /* Clean up in case of error */
            if (error  &&  dirp) {
                free(dirp);
                dirp = NULL;
            }
    
            return dirp;
        }
    
        /*
        * Read next directory entry.
        *
        * When working with text consoles, please note that file names returned by
        * readdir() are represented in the default ANSI code page while any output to
        * console is typically formatted on another code page.  Thus, non-ASCII
        * characters in file names will not usually display correctly on console.  The
        * problem can be fixed in two ways: (1) change the character set of console
        * to 1252 using chcp utility and use Lucida Console font, or (2) use
        * _cprintf function when writing to console.  The _cprinf() will re-encode
        * ANSI strings to the console code page so many non-ASCII characters will
        * display correcly.
        */
        static struct dirent*
            readdir(
            DIR *dirp)
        {
            WIN32_FIND_DATAW *datap;
            struct dirent *entp;
    
            /* Read next directory entry */
            datap = dirent_next(dirp->wdirp);
            if (datap) {
                size_t n;
                int error;
    
                /* Attempt to convert file name to multi-byte string */
                error = dirent_wcstombs_s(
                    &n, dirp->ent.d_name, PATH_MAX, datap->cFileName, PATH_MAX);
    
                /*
                * If the file name cannot be represented by a multi-byte string,
                * then attempt to use old 8+3 file name.  This allows traditional
                * Unix-code to access some file names despite of unicode
                * characters, although file names may seem unfamiliar to the user.
                *
                * Be ware that the code below cannot come up with a short file
                * name unless the file system provides one.  At least
                * VirtualBox shared folders fail to do this.
                */
                if (error  &&  datap->cAlternateFileName[0] != '\0') {
                    error = dirent_wcstombs_s(
                        &n, dirp->ent.d_name, PATH_MAX,
                        datap->cAlternateFileName, PATH_MAX);
                }
    
                if (!error) {
                    DWORD attr;
    
                    /* Initialize directory entry for return */
                    entp = &dirp->ent;
    
                    /* Length of file name excluding zero terminator */
                    entp->d_namlen = n - 1;
    
                    /* File attributes */
                    attr = datap->dwFileAttributes;
                    if ((attr & FILE_ATTRIBUTE_DEVICE) != 0) {
                        entp->d_type = DT_CHR;
                    }
                    else if ((attr & FILE_ATTRIBUTE_DIRECTORY) != 0) {
                        entp->d_type = DT_DIR;
                    }
                    else {
                        entp->d_type = DT_REG;
                    }
    
                    /* Reset dummy fields */
                    entp->d_ino = 0;
                    entp->d_reclen = sizeof(struct dirent);
    
                }
                else {
                    /*
                    * Cannot convert file name to multi-byte string so construct
                    * an errornous directory entry and return that.  Note that
                    * we cannot return NULL as that would stop the processing
                    * of directory entries completely.
                    */
                    entp = &dirp->ent;
                    entp->d_name[0] = '?';
                    entp->d_name[1] = '\0';
                    entp->d_namlen = 1;
                    entp->d_type = DT_UNKNOWN;
                    entp->d_ino = 0;
                    entp->d_reclen = 0;
                }
    
            }
            else {
                /* No more directory entries */
                entp = NULL;
            }
    
            return entp;
        }
    
        /*
        * Close directory stream.
        */
        static int
            closedir(
            DIR *dirp)
        {
            int ok;
            if (dirp) {
    
                /* Close wide-character directory stream */
                ok = _wclosedir(dirp->wdirp);
                dirp->wdirp = NULL;
    
                /* Release multi-byte character version */
                free(dirp);
    
            }
            else {
    
                /* Invalid directory stream */
                dirent_set_errno(EBADF);
                ok = /*failure*/-1;
    
            }
            return ok;
        }
    
        /*
        * Rewind directory stream to beginning.
        */
        static void
            rewinddir(
            DIR* dirp)
        {
            /* Rewind wide-character string directory stream */
            _wrewinddir(dirp->wdirp);
        }
    
        /* Convert multi-byte string to wide character string */
        static int
            dirent_mbstowcs_s(
            size_t *pReturnValue,
            wchar_t *wcstr,
            size_t sizeInWords,
            const char *mbstr,
            size_t count)
        {
            int error;
    
    #if defined(_MSC_VER)  &&  _MSC_VER >= 1400
    
            /* Microsoft Visual Studio 2005 or later */
            error = mbstowcs_s(pReturnValue, wcstr, sizeInWords, mbstr, count);
    
    #else
    
            /* Older Visual Studio or non-Microsoft compiler */
            size_t n;
    
            /* Convert to wide-character string (or count characters) */
            n = mbstowcs(wcstr, mbstr, sizeInWords);
            if (!wcstr || n < count) {
    
                /* Zero-terminate output buffer */
                if (wcstr  &&  sizeInWords) {
                    if (n >= sizeInWords) {
                        n = sizeInWords - 1;
                    }
                    wcstr[n] = 0;
                }
    
                /* Length of resuting multi-byte string WITH zero terminator */
                if (pReturnValue) {
                    *pReturnValue = n + 1;
                }
    
                /* Success */
                error = 0;
    
            }
            else {
    
                /* Could not convert string */
                error = 1;
    
            }
    
    #endif
    
            return error;
        }
    
        /* Convert wide-character string to multi-byte string */
        static int
            dirent_wcstombs_s(
            size_t *pReturnValue,
            char *mbstr,
            size_t sizeInBytes, /* max size of mbstr */
            const wchar_t *wcstr,
            size_t count)
        {
            int error;
    
    #if defined(_MSC_VER)  &&  _MSC_VER >= 1400
    
            /* Microsoft Visual Studio 2005 or later */
            error = wcstombs_s(pReturnValue, mbstr, sizeInBytes, wcstr, count);
    
    #else
    
            /* Older Visual Studio or non-Microsoft compiler */
            size_t n;
    
            /* Convert to multi-byte string (or count the number of bytes needed) */
            n = wcstombs(mbstr, wcstr, sizeInBytes);
            if (!mbstr || n < count) {
    
                /* Zero-terminate output buffer */
                if (mbstr  &&  sizeInBytes) {
                    if (n >= sizeInBytes) {
                        n = sizeInBytes - 1;
                    }
                    mbstr[n] = '\0';
                }
    
                /* Lenght of resulting multi-bytes string WITH zero-terminator */
                if (pReturnValue) {
                    *pReturnValue = n + 1;
                }
    
                /* Success */
                error = 0;
    
            }
            else {
    
                /* Cannot convert string */
                error = 1;
    
            }
    
    #endif
    
            return error;
        }
    
        /* Set errno variable */
        static void
            dirent_set_errno(
            int error)
        {
    #if defined(_MSC_VER)  &&  _MSC_VER >= 1400
    
            /* Microsoft Visual Studio 2005 and later */
            _set_errno(error);
    
    #else
    
            /* Non-Microsoft compiler or older Microsoft compiler */
            errno = error;
    
    #endif
        }
    
    
    #ifdef __cplusplus
    }
    #endif
    #endif /*DIRENT_H*/
    
    
    
    展开全文
  • vc6.0头文件dirent.h

    2019-03-04 15:26:35
    vc6.0头文件的dirent.h。需要时可以使用。
  • 将以下代码报错成dirent.h头文件 将dirent.h文件放入Microsoft Visual Studio的include文件夹内,如: C:\Program Files\Microsoft Visual Studio\VC\include /* * Dirent interface for Microsoft Visual Studio...

    解决办法:

    1. 将以下代码报错成dirent.h头文件
    2. 将dirent.h文件放入Microsoft Visual Studio的include文件夹内,如:
    C:\Program Files\Microsoft Visual Studio\VC\include
    
    /*
     * Dirent interface for Microsoft Visual Studio
     *
     * Copyright (C) 1998-2019 Toni Ronkko
     * This file is part of dirent.  Dirent may be freely distributed
     * under the MIT license.  For all details and documentation, see
     * https://github.com/tronkko/dirent
     */
    #ifndef DIRENT_H
    #define DIRENT_H
    
    /* Hide warnings about unreferenced local functions */
    #if defined(__clang__)
    #   pragma clang diagnostic ignored "-Wunused-function"
    #elif defined(_MSC_VER)
    #   pragma warning(disable:4505)
    #elif defined(__GNUC__)
    #   pragma GCC diagnostic ignored "-Wunused-function"
    #endif
    
    /*
     * Include windows.h without Windows Sockets 1.1 to prevent conflicts with
     * Windows Sockets 2.0.
     */
    #ifndef WIN32_LEAN_AND_MEAN
    #   define WIN32_LEAN_AND_MEAN
    #endif
    #include <windows.h>
    
    #include <stdio.h>
    #include <stdarg.h>
    #include <wchar.h>
    #include <string.h>
    #include <stdlib.h>
    #include <malloc.h>
    #include <sys/types.h>
    #include <sys/stat.h>
    #include <errno.h>
    
    /* Indicates that d_type field is available in dirent structure */
    #define _DIRENT_HAVE_D_TYPE
    
    /* Indicates that d_namlen field is available in dirent structure */
    #define _DIRENT_HAVE_D_NAMLEN
    
    /* Entries missing from MSVC 6.0 */
    #if !defined(FILE_ATTRIBUTE_DEVICE)
    #   define FILE_ATTRIBUTE_DEVICE 0x40
    #endif
    
    /* File type and permission flags for stat(), general mask */
    #if !defined(S_IFMT)
    #   define S_IFMT _S_IFMT
    #endif
    
    /* Directory bit */
    #if !defined(S_IFDIR)
    #   define S_IFDIR _S_IFDIR
    #endif
    
    /* Character device bit */
    #if !defined(S_IFCHR)
    #   define S_IFCHR _S_IFCHR
    #endif
    
    /* Pipe bit */
    #if !defined(S_IFFIFO)
    #   define S_IFFIFO _S_IFFIFO
    #endif
    
    /* Regular file bit */
    #if !defined(S_IFREG)
    #   define S_IFREG _S_IFREG
    #endif
    
    /* Read permission */
    #if !defined(S_IREAD)
    #   define S_IREAD _S_IREAD
    #endif
    
    /* Write permission */
    #if !defined(S_IWRITE)
    #   define S_IWRITE _S_IWRITE
    #endif
    
    /* Execute permission */
    #if !defined(S_IEXEC)
    #   define S_IEXEC _S_IEXEC
    #endif
    
    /* Pipe */
    #if !defined(S_IFIFO)
    #   define S_IFIFO _S_IFIFO
    #endif
    
    /* Block device */
    #if !defined(S_IFBLK)
    #   define S_IFBLK 0
    #endif
    
    /* Link */
    #if !defined(S_IFLNK)
    #   define S_IFLNK 0
    #endif
    
    /* Socket */
    #if !defined(S_IFSOCK)
    #   define S_IFSOCK 0
    #endif
    
    /* Read user permission */
    #if !defined(S_IRUSR)
    #   define S_IRUSR S_IREAD
    #endif
    
    /* Write user permission */
    #if !defined(S_IWUSR)
    #   define S_IWUSR S_IWRITE
    #endif
    
    /* Execute user permission */
    #if !defined(S_IXUSR)
    #   define S_IXUSR 0
    #endif
    
    /* Read group permission */
    #if !defined(S_IRGRP)
    #   define S_IRGRP 0
    #endif
    
    /* Write group permission */
    #if !defined(S_IWGRP)
    #   define S_IWGRP 0
    #endif
    
    /* Execute group permission */
    #if !defined(S_IXGRP)
    #   define S_IXGRP 0
    #endif
    
    /* Read others permission */
    #if !defined(S_IROTH)
    #   define S_IROTH 0
    #endif
    
    /* Write others permission */
    #if !defined(S_IWOTH)
    #   define S_IWOTH 0
    #endif
    
    /* Execute others permission */
    #if !defined(S_IXOTH)
    #   define S_IXOTH 0
    #endif
    
    /* Maximum length of file name */
    #if !defined(PATH_MAX)
    #   define PATH_MAX MAX_PATH
    #endif
    #if !defined(FILENAME_MAX)
    #   define FILENAME_MAX MAX_PATH
    #endif
    #if !defined(NAME_MAX)
    #   define NAME_MAX FILENAME_MAX
    #endif
    
    /* File type flags for d_type */
    #define DT_UNKNOWN 0
    #define DT_REG S_IFREG
    #define DT_DIR S_IFDIR
    #define DT_FIFO S_IFIFO
    #define DT_SOCK S_IFSOCK
    #define DT_CHR S_IFCHR
    #define DT_BLK S_IFBLK
    #define DT_LNK S_IFLNK
    
    /* Macros for converting between st_mode and d_type */
    #define IFTODT(mode) ((mode) & S_IFMT)
    #define DTTOIF(type) (type)
    
    /*
     * File type macros.  Note that block devices, sockets and links cannot be
     * distinguished on Windows and the macros S_ISBLK, S_ISSOCK and S_ISLNK are
     * only defined for compatibility.  These macros should always return false
     * on Windows.
     */
    #if !defined(S_ISFIFO)
    #   define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)
    #endif
    #if !defined(S_ISDIR)
    #   define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)
    #endif
    #if !defined(S_ISREG)
    #   define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)
    #endif
    #if !defined(S_ISLNK)
    #   define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)
    #endif
    #if !defined(S_ISSOCK)
    #   define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
    #endif
    #if !defined(S_ISCHR)
    #   define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)
    #endif
    #if !defined(S_ISBLK)
    #   define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)
    #endif
    
    /* Return the exact length of the file name without zero terminator */
    #define _D_EXACT_NAMLEN(p) ((p)->d_namlen)
    
    /* Return the maximum size of a file name */
    #define _D_ALLOC_NAMLEN(p) ((PATH_MAX)+1)
    
    
    #ifdef __cplusplus
    extern "C" {
    #endif
    
    
    /* Wide-character version */
    struct _wdirent {
        /* Always zero */
        long d_ino;
    
        /* File position within stream */
        long d_off;
    
        /* Structure size */
        unsigned short d_reclen;
    
        /* Length of name without \0 */
        size_t d_namlen;
    
        /* File type */
        int d_type;
    
        /* File name */
        wchar_t d_name[PATH_MAX+1];
    };
    typedef struct _wdirent _wdirent;
    
    struct _WDIR {
        /* Current directory entry */
        struct _wdirent ent;
    
        /* Private file data */
        WIN32_FIND_DATAW data;
    
        /* True if data is valid */
        int cached;
    
        /* Win32 search handle */
        HANDLE handle;
    
        /* Initial directory name */
        wchar_t *patt;
    };
    typedef struct _WDIR _WDIR;
    
    /* Multi-byte character version */
    struct dirent {
        /* Always zero */
        long d_ino;
    
        /* File position within stream */
        long d_off;
    
        /* Structure size */
        unsigned short d_reclen;
    
        /* Length of name without \0 */
        size_t d_namlen;
    
        /* File type */
        int d_type;
    
        /* File name */
        char d_name[PATH_MAX+1];
    };
    typedef struct dirent dirent;
    
    struct DIR {
        struct dirent ent;
        struct _WDIR *wdirp;
    };
    typedef struct DIR DIR;
    
    
    /* Dirent functions */
    static DIR *opendir (const char *dirname);
    static _WDIR *_wopendir (const wchar_t *dirname);
    
    static struct dirent *readdir (DIR *dirp);
    static struct _wdirent *_wreaddir (_WDIR *dirp);
    
    static int readdir_r(
        DIR *dirp, struct dirent *entry, struct dirent **result);
    static int _wreaddir_r(
        _WDIR *dirp, struct _wdirent *entry, struct _wdirent **result);
    
    static int closedir (DIR *dirp);
    static int _wclosedir (_WDIR *dirp);
    
    static void rewinddir (DIR* dirp);
    static void _wrewinddir (_WDIR* dirp);
    
    static int scandir (const char *dirname, struct dirent ***namelist,
        int (*filter)(const struct dirent*),
        int (*compare)(const struct dirent**, const struct dirent**));
    
    static int alphasort (const struct dirent **a, const struct dirent **b);
    
    static int versionsort (const struct dirent **a, const struct dirent **b);
    
    
    /* For compatibility with Symbian */
    #define wdirent _wdirent
    #define WDIR _WDIR
    #define wopendir _wopendir
    #define wreaddir _wreaddir
    #define wclosedir _wclosedir
    #define wrewinddir _wrewinddir
    
    
    /* Internal utility functions */
    static WIN32_FIND_DATAW *dirent_first (_WDIR *dirp);
    static WIN32_FIND_DATAW *dirent_next (_WDIR *dirp);
    
    static int dirent_mbstowcs_s(
        size_t *pReturnValue,
        wchar_t *wcstr,
        size_t sizeInWords,
        const char *mbstr,
        size_t count);
    
    static int dirent_wcstombs_s(
        size_t *pReturnValue,
        char *mbstr,
        size_t sizeInBytes,
        const wchar_t *wcstr,
        size_t count);
    
    static void dirent_set_errno (int error);
    
    
    /*
     * Open directory stream DIRNAME for read and return a pointer to the
     * internal working area that is used to retrieve individual directory
     * entries.
     */
    static _WDIR*
    _wopendir(
        const wchar_t *dirname)
    {
        _WDIR *dirp;
        DWORD n;
        wchar_t *p;
    
        /* Must have directory name */
        if (dirname == NULL  ||  dirname[0] == '\0') {
            dirent_set_errno (ENOENT);
            return NULL;
        }
    
        /* Allocate new _WDIR structure */
        dirp = (_WDIR*) malloc (sizeof (struct _WDIR));
        if (!dirp) {
            return NULL;
        }
    
        /* Reset _WDIR structure */
        dirp->handle = INVALID_HANDLE_VALUE;
        dirp->patt = NULL;
        dirp->cached = 0;
    
        /*
         * Compute the length of full path plus zero terminator
         *
         * Note that on WinRT there's no way to convert relative paths
         * into absolute paths, so just assume it is an absolute path.
         */
    #if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
        /* Desktop */
        n = GetFullPathNameW (dirname, 0, NULL, NULL);
    #else
        /* WinRT */
        n = wcslen (dirname);
    #endif
    
        /* Allocate room for absolute directory name and search pattern */
        dirp->patt = (wchar_t*) malloc (sizeof (wchar_t) * n + 16);
        if (dirp->patt == NULL) {
            goto exit_closedir;
        }
    
        /*
         * Convert relative directory name to an absolute one.  This
         * allows rewinddir() to function correctly even when current
         * working directory is changed between opendir() and rewinddir().
         *
         * Note that on WinRT there's no way to convert relative paths
         * into absolute paths, so just assume it is an absolute path.
         */
    #if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
        /* Desktop */
        n = GetFullPathNameW (dirname, n, dirp->patt, NULL);
        if (n <= 0) {
            goto exit_closedir;
        }
    #else
        /* WinRT */
        wcsncpy_s (dirp->patt, n+1, dirname, n);
    #endif
    
        /* Append search pattern \* to the directory name */
        p = dirp->patt + n;
        switch (p[-1]) {
        case '\\':
        case '/':
        case ':':
            /* Directory ends in path separator, e.g. c:\temp\ */
            /*NOP*/;
            break;
    
        default:
            /* Directory name doesn't end in path separator */
            *p++ = '\\';
        }
        *p++ = '*';
        *p = '\0';
    
        /* Open directory stream and retrieve the first entry */
        if (!dirent_first (dirp)) {
            goto exit_closedir;
        }
    
        /* Success */
        return dirp;
    
        /* Failure */
    exit_closedir:
        _wclosedir (dirp);
        return NULL;
    }
    
    /*
     * Read next directory entry.
     *
     * Returns pointer to static directory entry which may be overwritten by
     * subsequent calls to _wreaddir().
     */
    static struct _wdirent*
    _wreaddir(
        _WDIR *dirp)
    {
        struct _wdirent *entry;
    
        /*
         * Read directory entry to buffer.  We can safely ignore the return value
         * as entry will be set to NULL in case of error.
         */
        (void) _wreaddir_r (dirp, &dirp->ent, &entry);
    
        /* Return pointer to statically allocated directory entry */
        return entry;
    }
    
    /*
     * Read next directory entry.
     *
     * Returns zero on success.  If end of directory stream is reached, then sets
     * result to NULL and returns zero.
     */
    static int
    _wreaddir_r(
        _WDIR *dirp,
        struct _wdirent *entry,
        struct _wdirent **result)
    {
        WIN32_FIND_DATAW *datap;
    
        /* Read next directory entry */
        datap = dirent_next (dirp);
        if (datap) {
            size_t n;
            DWORD attr;
    
            /*
             * Copy file name as wide-character string.  If the file name is too
             * long to fit in to the destination buffer, then truncate file name
             * to PATH_MAX characters and zero-terminate the buffer.
             */
            n = 0;
            while (n < PATH_MAX  &&  datap->cFileName[n] != 0) {
                entry->d_name[n] = datap->cFileName[n];
                n++;
            }
            entry->d_name[n] = 0;
    
            /* Length of file name excluding zero terminator */
            entry->d_namlen = n;
    
            /* File type */
            attr = datap->dwFileAttributes;
            if ((attr & FILE_ATTRIBUTE_DEVICE) != 0) {
                entry->d_type = DT_CHR;
            } else if ((attr & FILE_ATTRIBUTE_DIRECTORY) != 0) {
                entry->d_type = DT_DIR;
            } else {
                entry->d_type = DT_REG;
            }
    
            /* Reset dummy fields */
            entry->d_ino = 0;
            entry->d_off = 0;
            entry->d_reclen = sizeof (struct _wdirent);
    
            /* Set result address */
            *result = entry;
    
        } else {
    
            /* Return NULL to indicate end of directory */
            *result = NULL;
    
        }
    
        return /*OK*/0;
    }
    
    /*
     * Close directory stream opened by opendir() function.  This invalidates the
     * DIR structure as well as any directory entry read previously by
     * _wreaddir().
     */
    static int
    _wclosedir(
        _WDIR *dirp)
    {
        int ok;
        if (dirp) {
    
            /* Release search handle */
            if (dirp->handle != INVALID_HANDLE_VALUE) {
                FindClose (dirp->handle);
            }
    
            /* Release search pattern */
            free (dirp->patt);
    
            /* Release directory structure */
            free (dirp);
            ok = /*success*/0;
    
        } else {
    
            /* Invalid directory stream */
            dirent_set_errno (EBADF);
            ok = /*failure*/-1;
    
        }
        return ok;
    }
    
    /*
     * Rewind directory stream such that _wreaddir() returns the very first
     * file name again.
     */
    static void
    _wrewinddir(
        _WDIR* dirp)
    {
        if (dirp) {
            /* Release existing search handle */
            if (dirp->handle != INVALID_HANDLE_VALUE) {
                FindClose (dirp->handle);
            }
    
            /* Open new search handle */
            dirent_first (dirp);
        }
    }
    
    /* Get first directory entry (internal) */
    static WIN32_FIND_DATAW*
    dirent_first(
        _WDIR *dirp)
    {
        WIN32_FIND_DATAW *datap;
        DWORD error;
    
        /* Open directory and retrieve the first entry */
        dirp->handle = FindFirstFileExW(
            dirp->patt, FindExInfoStandard, &dirp->data,
            FindExSearchNameMatch, NULL, 0);
        if (dirp->handle != INVALID_HANDLE_VALUE) {
    
            /* a directory entry is now waiting in memory */
            datap = &dirp->data;
            dirp->cached = 1;
    
        } else {
    
            /* Failed to open directory: no directory entry in memory */
            dirp->cached = 0;
            datap = NULL;
    
            /* Set error code */
            error = GetLastError ();
            switch (error) {
            case ERROR_ACCESS_DENIED:
                /* No read access to directory */
                dirent_set_errno (EACCES);
                break;
    
            case ERROR_DIRECTORY:
                /* Directory name is invalid */
                dirent_set_errno (ENOTDIR);
                break;
    
            case ERROR_PATH_NOT_FOUND:
            default:
                /* Cannot find the file */
                dirent_set_errno (ENOENT);
            }
    
        }
        return datap;
    }
    
    /*
     * Get next directory entry (internal).
     *
     * Returns
     */
    static WIN32_FIND_DATAW*
    dirent_next(
        _WDIR *dirp)
    {
        WIN32_FIND_DATAW *p;
    
        /* Get next directory entry */
        if (dirp->cached != 0) {
    
            /* A valid directory entry already in memory */
            p = &dirp->data;
            dirp->cached = 0;
    
        } else if (dirp->handle != INVALID_HANDLE_VALUE) {
    
            /* Get the next directory entry from stream */
            if (FindNextFileW (dirp->handle, &dirp->data) != FALSE) {
                /* Got a file */
                p = &dirp->data;
            } else {
                /* The very last entry has been processed or an error occurred */
                FindClose (dirp->handle);
                dirp->handle = INVALID_HANDLE_VALUE;
                p = NULL;
            }
    
        } else {
    
            /* End of directory stream reached */
            p = NULL;
    
        }
    
        return p;
    }
    
    /*
     * Open directory stream using plain old C-string.
     */
    static DIR*
    opendir(
        const char *dirname)
    {
        struct DIR *dirp;
    
        /* Must have directory name */
        if (dirname == NULL  ||  dirname[0] == '\0') {
            dirent_set_errno (ENOENT);
            return NULL;
        }
    
        /* Allocate memory for DIR structure */
        dirp = (DIR*) malloc (sizeof (struct DIR));
        if (!dirp) {
            return NULL;
        }
        {
            int error;
            wchar_t wname[PATH_MAX + 1];
            size_t n;
    
            /* Convert directory name to wide-character string */
            error = dirent_mbstowcs_s(
                &n, wname, PATH_MAX + 1, dirname, PATH_MAX + 1);
            if (error) {
                /*
                 * Cannot convert file name to wide-character string.  This
                 * occurs if the string contains invalid multi-byte sequences or
                 * the output buffer is too small to contain the resulting
                 * string.
                 */
                goto exit_free;
            }
    
    
            /* Open directory stream using wide-character name */
            dirp->wdirp = _wopendir (wname);
            if (!dirp->wdirp) {
                goto exit_free;
            }
    
        }
    
        /* Success */
        return dirp;
    
        /* Failure */
    exit_free:
        free (dirp);
        return NULL;
    }
    
    /*
     * Read next directory entry.
     */
    static struct dirent*
    readdir(
        DIR *dirp)
    {
        struct dirent *entry;
    
        /*
         * Read directory entry to buffer.  We can safely ignore the return value
         * as entry will be set to NULL in case of error.
         */
        (void) readdir_r (dirp, &dirp->ent, &entry);
    
        /* Return pointer to statically allocated directory entry */
        return entry;
    }
    
    /*
     * Read next directory entry into called-allocated buffer.
     *
     * Returns zero on success.  If the end of directory stream is reached, then
     * sets result to NULL and returns zero.
     */
    static int
    readdir_r(
        DIR *dirp,
        struct dirent *entry,
        struct dirent **result)
    {
        WIN32_FIND_DATAW *datap;
    
        /* Read next directory entry */
        datap = dirent_next (dirp->wdirp);
        if (datap) {
            size_t n;
            int error;
    
            /* Attempt to convert file name to multi-byte string */
            error = dirent_wcstombs_s(
                &n, entry->d_name, PATH_MAX + 1, datap->cFileName, PATH_MAX + 1);
    
            /*
             * If the file name cannot be represented by a multi-byte string,
             * then attempt to use old 8+3 file name.  This allows traditional
             * Unix-code to access some file names despite of unicode
             * characters, although file names may seem unfamiliar to the user.
             *
             * Be ware that the code below cannot come up with a short file
             * name unless the file system provides one.  At least
             * VirtualBox shared folders fail to do this.
             */
            if (error  &&  datap->cAlternateFileName[0] != '\0') {
                error = dirent_wcstombs_s(
                    &n, entry->d_name, PATH_MAX + 1,
                    datap->cAlternateFileName, PATH_MAX + 1);
            }
    
            if (!error) {
                DWORD attr;
    
                /* Length of file name excluding zero terminator */
                entry->d_namlen = n - 1;
    
                /* File attributes */
                attr = datap->dwFileAttributes;
                if ((attr & FILE_ATTRIBUTE_DEVICE) != 0) {
                    entry->d_type = DT_CHR;
                } else if ((attr & FILE_ATTRIBUTE_DIRECTORY) != 0) {
                    entry->d_type = DT_DIR;
                } else {
                    entry->d_type = DT_REG;
                }
    
                /* Reset dummy fields */
                entry->d_ino = 0;
                entry->d_off = 0;
                entry->d_reclen = sizeof (struct dirent);
    
            } else {
    
                /*
                 * Cannot convert file name to multi-byte string so construct
                 * an erroneous directory entry and return that.  Note that
                 * we cannot return NULL as that would stop the processing
                 * of directory entries completely.
                 */
                entry->d_name[0] = '?';
                entry->d_name[1] = '\0';
                entry->d_namlen = 1;
                entry->d_type = DT_UNKNOWN;
                entry->d_ino = 0;
                entry->d_off = -1;
                entry->d_reclen = 0;
    
            }
    
            /* Return pointer to directory entry */
            *result = entry;
    
        } else {
    
            /* No more directory entries */
            *result = NULL;
    
        }
    
        return /*OK*/0;
    }
    
    /*
     * Close directory stream.
     */
    static int
    closedir(
        DIR *dirp)
    {
        int ok;
        if (dirp) {
    
            /* Close wide-character directory stream */
            ok = _wclosedir (dirp->wdirp);
            dirp->wdirp = NULL;
    
            /* Release multi-byte character version */
            free (dirp);
    
        } else {
    
            /* Invalid directory stream */
            dirent_set_errno (EBADF);
            ok = /*failure*/-1;
    
        }
        return ok;
    }
    
    /*
     * Rewind directory stream to beginning.
     */
    static void
    rewinddir(
        DIR* dirp)
    {
        /* Rewind wide-character string directory stream */
        _wrewinddir (dirp->wdirp);
    }
    
    /*
     * Scan directory for entries.
     */
    static int
    scandir(
        const char *dirname,
        struct dirent ***namelist,
        int (*filter)(const struct dirent*),
        int (*compare)(const struct dirent**, const struct dirent**))
    {
        struct dirent **files = NULL;
        size_t size = 0;
        size_t allocated = 0;
        const size_t init_size = 1;
        DIR *dir = NULL;
        struct dirent *entry;
        struct dirent *tmp = NULL;
        size_t i;
        int result = 0;
    
        /* Open directory stream */
        dir = opendir (dirname);
        if (dir) {
    
            /* Read directory entries to memory */
            while (1) {
    
                /* Enlarge pointer table to make room for another pointer */
                if (size >= allocated) {
                    void *p;
                    size_t num_entries;
    
                    /* Compute number of entries in the enlarged pointer table */
                    if (size < init_size) {
                        /* Allocate initial pointer table */
                        num_entries = init_size;
                    } else {
                        /* Double the size */
                        num_entries = size * 2;
                    }
    
                    /* Allocate first pointer table or enlarge existing table */
                    p = realloc (files, sizeof (void*) * num_entries);
                    if (p != NULL) {
                        /* Got the memory */
                        files = (dirent**) p;
                        allocated = num_entries;
                    } else {
                        /* Out of memory */
                        result = -1;
                        break;
                    }
    
                }
    
                /* Allocate room for temporary directory entry */
                if (tmp == NULL) {
                    tmp = (struct dirent*) malloc (sizeof (struct dirent));
                    if (tmp == NULL) {
                        /* Cannot allocate temporary directory entry */
                        result = -1;
                        break;
                    }
                }
    
                /* Read directory entry to temporary area */
                if (readdir_r (dir, tmp, &entry) == /*OK*/0) {
    
                    /* Did we get an entry? */
                    if (entry != NULL) {
                        int pass;
    
                        /* Determine whether to include the entry in result */
                        if (filter) {
                            /* Let the filter function decide */
                            pass = filter (tmp);
                        } else {
                            /* No filter function, include everything */
                            pass = 1;
                        }
    
                        if (pass) {
                            /* Store the temporary entry to pointer table */
                            files[size++] = tmp;
                            tmp = NULL;
    
                            /* Keep up with the number of files */
                            result++;
                        }
    
                    } else {
    
                        /*
                         * End of directory stream reached => sort entries and
                         * exit.
                         */
                        qsort (files, size, sizeof (void*),
                            (int (*) (const void*, const void*)) compare);
                        break;
    
                    }
    
                } else {
                    /* Error reading directory entry */
                    result = /*Error*/ -1;
                    break;
                }
    
            }
    
        } else {
            /* Cannot open directory */
            result = /*Error*/ -1;
        }
    
        /* Release temporary directory entry */
        free (tmp);
    
        /* Release allocated memory on error */
        if (result < 0) {
            for (i = 0; i < size; i++) {
                free (files[i]);
            }
            free (files);
            files = NULL;
        }
    
        /* Close directory stream */
        if (dir) {
            closedir (dir);
        }
    
        /* Pass pointer table to caller */
        if (namelist) {
            *namelist = files;
        }
        return result;
    }
    
    /* Alphabetical sorting */
    static int
    alphasort(
        const struct dirent **a, const struct dirent **b)
    {
        return strcoll ((*a)->d_name, (*b)->d_name);
    }
    
    /* Sort versions */
    static int
    versionsort(
        const struct dirent **a, const struct dirent **b)
    {
        /* FIXME: implement strverscmp and use that */
        return alphasort (a, b);
    }
    
    /* Convert multi-byte string to wide character string */
    static int
    dirent_mbstowcs_s(
        size_t *pReturnValue,
        wchar_t *wcstr,
        size_t sizeInWords,
        const char *mbstr,
        size_t count)
    {
        int error;
    
    #if defined(_MSC_VER)  &&  _MSC_VER >= 1400
    
        /* Microsoft Visual Studio 2005 or later */
        error = mbstowcs_s (pReturnValue, wcstr, sizeInWords, mbstr, count);
    
    #else
    
        /* Older Visual Studio or non-Microsoft compiler */
        size_t n;
    
        /* Convert to wide-character string (or count characters) */
        n = mbstowcs (wcstr, mbstr, sizeInWords);
        if (!wcstr  ||  n < count) {
    
            /* Zero-terminate output buffer */
            if (wcstr  &&  sizeInWords) {
                if (n >= sizeInWords) {
                    n = sizeInWords - 1;
                }
                wcstr[n] = 0;
            }
    
            /* Length of resulting multi-byte string WITH zero terminator */
            if (pReturnValue) {
                *pReturnValue = n + 1;
            }
    
            /* Success */
            error = 0;
    
        } else {
    
            /* Could not convert string */
            error = 1;
    
        }
    
    #endif
        return error;
    }
    
    /* Convert wide-character string to multi-byte string */
    static int
    dirent_wcstombs_s(
        size_t *pReturnValue,
        char *mbstr,
        size_t sizeInBytes, /* max size of mbstr */
        const wchar_t *wcstr,
        size_t count)
    {
        int error;
    
    #if defined(_MSC_VER)  &&  _MSC_VER >= 1400
    
        /* Microsoft Visual Studio 2005 or later */
        error = wcstombs_s (pReturnValue, mbstr, sizeInBytes, wcstr, count);
    
    #else
    
        /* Older Visual Studio or non-Microsoft compiler */
        size_t n;
    
        /* Convert to multi-byte string (or count the number of bytes needed) */
        n = wcstombs (mbstr, wcstr, sizeInBytes);
        if (!mbstr  ||  n < count) {
    
            /* Zero-terminate output buffer */
            if (mbstr  &&  sizeInBytes) {
                if (n >= sizeInBytes) {
                    n = sizeInBytes - 1;
                }
                mbstr[n] = '\0';
            }
    
            /* Length of resulting multi-bytes string WITH zero-terminator */
            if (pReturnValue) {
                *pReturnValue = n + 1;
            }
    
            /* Success */
            error = 0;
    
        } else {
    
            /* Cannot convert string */
            error = 1;
    
        }
    
    #endif
        return error;
    }
    
    /* Set errno variable */
    static void
    dirent_set_errno(
        int error)
    {
    #if defined(_MSC_VER)  &&  _MSC_VER >= 1400
    
        /* Microsoft Visual Studio 2005 and later */
        _set_errno (error);
    
    #else
    
        /* Non-Microsoft compiler or older Microsoft compiler */
        errno = error;
    
    #endif
    }
    
    
    #ifdef __cplusplus
    }
    #endif
    #endif /*DIRENT_H*/
    
    
    
    
    展开全文
  • VS2103没有“dirent.h”文件

    千次阅读 2019-06-29 16:43:39
    在VS2013中使用dirent.h文件时,找不到该文件。 错误描述: 无法打开包括文件"dirent.h":No such file or directory 2 原因 windows兼容dirent.h文中所述: “<dirent.h>是个unix系统下常见的接口,但windows...

    1 问题描述

    在这里插入图片描述
    在VS2013中使用dirent.h文件时,找不到该文件。
    错误描述:
    无法打开包括文件"dirent.h":No such file or directory

    2 原因

    windows兼容dirent.h文中所述:

    “<dirent.h>是个unix系统下常见的接口,但windows平台的MSVC编译器并没有提供这个接口,对于跨平台的项目开发就会带来一些麻烦,如果在MSVC下编译时可能因为windows平台缺少这个接口就要为windows平台另外写一些代码。”

    3 解决办法

    1. windows兼容dirent.h文中所述。
    2. 如果上述GitHub中的压缩包不能下载,则复制下面的代码,然后保存为“dirent.h”,放入VS的include文件夹下即可(具体步骤参见 4 解决步骤)
    /*
     * Dirent interface for Microsoft Visual Studio
     *
     * Copyright (C) 1998-2019 Toni Ronkko
     * This file is part of dirent.  Dirent may be freely distributed
     * under the MIT license.  For all details and documentation, see
     * https://github.com/tronkko/dirent
     */
    #ifndef DIRENT_H
    #define DIRENT_H
    
    /* Hide warnings about unreferenced local functions */
    #if defined(__clang__)
    #   pragma clang diagnostic ignored "-Wunused-function"
    #elif defined(_MSC_VER)
    #   pragma warning(disable:4505)
    #elif defined(__GNUC__)
    #   pragma GCC diagnostic ignored "-Wunused-function"
    #endif
    
    /*
     * Include windows.h without Windows Sockets 1.1 to prevent conflicts with
     * Windows Sockets 2.0.
     */
    #ifndef WIN32_LEAN_AND_MEAN
    #   define WIN32_LEAN_AND_MEAN
    #endif
    #include <windows.h>
    
    #include <stdio.h>
    #include <stdarg.h>
    #include <wchar.h>
    #include <string.h>
    #include <stdlib.h>
    #include <malloc.h>
    #include <sys/types.h>
    #include <sys/stat.h>
    #include <errno.h>
    
    /* Indicates that d_type field is available in dirent structure */
    #define _DIRENT_HAVE_D_TYPE
    
    /* Indicates that d_namlen field is available in dirent structure */
    #define _DIRENT_HAVE_D_NAMLEN
    
    /* Entries missing from MSVC 6.0 */
    #if !defined(FILE_ATTRIBUTE_DEVICE)
    #   define FILE_ATTRIBUTE_DEVICE 0x40
    #endif
    
    /* File type and permission flags for stat(), general mask */
    #if !defined(S_IFMT)
    #   define S_IFMT _S_IFMT
    #endif
    
    /* Directory bit */
    #if !defined(S_IFDIR)
    #   define S_IFDIR _S_IFDIR
    #endif
    
    /* Character device bit */
    #if !defined(S_IFCHR)
    #   define S_IFCHR _S_IFCHR
    #endif
    
    /* Pipe bit */
    #if !defined(S_IFFIFO)
    #   define S_IFFIFO _S_IFFIFO
    #endif
    
    /* Regular file bit */
    #if !defined(S_IFREG)
    #   define S_IFREG _S_IFREG
    #endif
    
    /* Read permission */
    #if !defined(S_IREAD)
    #   define S_IREAD _S_IREAD
    #endif
    
    /* Write permission */
    #if !defined(S_IWRITE)
    #   define S_IWRITE _S_IWRITE
    #endif
    
    /* Execute permission */
    #if !defined(S_IEXEC)
    #   define S_IEXEC _S_IEXEC
    #endif
    
    /* Pipe */
    #if !defined(S_IFIFO)
    #   define S_IFIFO _S_IFIFO
    #endif
    
    /* Block device */
    #if !defined(S_IFBLK)
    #   define S_IFBLK 0
    #endif
    
    /* Link */
    #if !defined(S_IFLNK)
    #   define S_IFLNK 0
    #endif
    
    /* Socket */
    #if !defined(S_IFSOCK)
    #   define S_IFSOCK 0
    #endif
    
    /* Read user permission */
    #if !defined(S_IRUSR)
    #   define S_IRUSR S_IREAD
    #endif
    
    /* Write user permission */
    #if !defined(S_IWUSR)
    #   define S_IWUSR S_IWRITE
    #endif
    
    /* Execute user permission */
    #if !defined(S_IXUSR)
    #   define S_IXUSR 0
    #endif
    
    /* Read group permission */
    #if !defined(S_IRGRP)
    #   define S_IRGRP 0
    #endif
    
    /* Write group permission */
    #if !defined(S_IWGRP)
    #   define S_IWGRP 0
    #endif
    
    /* Execute group permission */
    #if !defined(S_IXGRP)
    #   define S_IXGRP 0
    #endif
    
    /* Read others permission */
    #if !defined(S_IROTH)
    #   define S_IROTH 0
    #endif
    
    /* Write others permission */
    #if !defined(S_IWOTH)
    #   define S_IWOTH 0
    #endif
    
    /* Execute others permission */
    #if !defined(S_IXOTH)
    #   define S_IXOTH 0
    #endif
    
    /* Maximum length of file name */
    #if !defined(PATH_MAX)
    #   define PATH_MAX MAX_PATH
    #endif
    #if !defined(FILENAME_MAX)
    #   define FILENAME_MAX MAX_PATH
    #endif
    #if !defined(NAME_MAX)
    #   define NAME_MAX FILENAME_MAX
    #endif
    
    /* File type flags for d_type */
    #define DT_UNKNOWN 0
    #define DT_REG S_IFREG
    #define DT_DIR S_IFDIR
    #define DT_FIFO S_IFIFO
    #define DT_SOCK S_IFSOCK
    #define DT_CHR S_IFCHR
    #define DT_BLK S_IFBLK
    #define DT_LNK S_IFLNK
    
    /* Macros for converting between st_mode and d_type */
    #define IFTODT(mode) ((mode) & S_IFMT)
    #define DTTOIF(type) (type)
    
    /*
     * File type macros.  Note that block devices, sockets and links cannot be
     * distinguished on Windows and the macros S_ISBLK, S_ISSOCK and S_ISLNK are
     * only defined for compatibility.  These macros should always return false
     * on Windows.
     */
    #if !defined(S_ISFIFO)
    #   define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO)
    #endif
    #if !defined(S_ISDIR)
    #   define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR)
    #endif
    #if !defined(S_ISREG)
    #   define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG)
    #endif
    #if !defined(S_ISLNK)
    #   define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK)
    #endif
    #if !defined(S_ISSOCK)
    #   define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK)
    #endif
    #if !defined(S_ISCHR)
    #   define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)
    #endif
    #if !defined(S_ISBLK)
    #   define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)
    #endif
    
    /* Return the exact length of the file name without zero terminator */
    #define _D_EXACT_NAMLEN(p) ((p)->d_namlen)
    
    /* Return the maximum size of a file name */
    #define _D_ALLOC_NAMLEN(p) ((PATH_MAX)+1)
    
    
    #ifdef __cplusplus
    extern "C" {
    #endif
    
    
    /* Wide-character version */
    struct _wdirent {
        /* Always zero */
        long d_ino;
    
        /* File position within stream */
        long d_off;
    
        /* Structure size */
        unsigned short d_reclen;
    
        /* Length of name without \0 */
        size_t d_namlen;
    
        /* File type */
        int d_type;
    
        /* File name */
        wchar_t d_name[PATH_MAX+1];
    };
    typedef struct _wdirent _wdirent;
    
    struct _WDIR {
        /* Current directory entry */
        struct _wdirent ent;
    
        /* Private file data */
        WIN32_FIND_DATAW data;
    
        /* True if data is valid */
        int cached;
    
        /* Win32 search handle */
        HANDLE handle;
    
        /* Initial directory name */
        wchar_t *patt;
    };
    typedef struct _WDIR _WDIR;
    
    /* Multi-byte character version */
    struct dirent {
        /* Always zero */
        long d_ino;
    
        /* File position within stream */
        long d_off;
    
        /* Structure size */
        unsigned short d_reclen;
    
        /* Length of name without \0 */
        size_t d_namlen;
    
        /* File type */
        int d_type;
    
        /* File name */
        char d_name[PATH_MAX+1];
    };
    typedef struct dirent dirent;
    
    struct DIR {
        struct dirent ent;
        struct _WDIR *wdirp;
    };
    typedef struct DIR DIR;
    
    
    /* Dirent functions */
    static DIR *opendir (const char *dirname);
    static _WDIR *_wopendir (const wchar_t *dirname);
    
    static struct dirent *readdir (DIR *dirp);
    static struct _wdirent *_wreaddir (_WDIR *dirp);
    
    static int readdir_r(
        DIR *dirp, struct dirent *entry, struct dirent **result);
    static int _wreaddir_r(
        _WDIR *dirp, struct _wdirent *entry, struct _wdirent **result);
    
    static int closedir (DIR *dirp);
    static int _wclosedir (_WDIR *dirp);
    
    static void rewinddir (DIR* dirp);
    static void _wrewinddir (_WDIR* dirp);
    
    static int scandir (const char *dirname, struct dirent ***namelist,
        int (*filter)(const struct dirent*),
        int (*compare)(const struct dirent**, const struct dirent**));
    
    static int alphasort (const struct dirent **a, const struct dirent **b);
    
    static int versionsort (const struct dirent **a, const struct dirent **b);
    
    
    /* For compatibility with Symbian */
    #define wdirent _wdirent
    #define WDIR _WDIR
    #define wopendir _wopendir
    #define wreaddir _wreaddir
    #define wclosedir _wclosedir
    #define wrewinddir _wrewinddir
    
    
    /* Internal utility functions */
    static WIN32_FIND_DATAW *dirent_first (_WDIR *dirp);
    static WIN32_FIND_DATAW *dirent_next (_WDIR *dirp);
    
    static int dirent_mbstowcs_s(
        size_t *pReturnValue,
        wchar_t *wcstr,
        size_t sizeInWords,
        const char *mbstr,
        size_t count);
    
    static int dirent_wcstombs_s(
        size_t *pReturnValue,
        char *mbstr,
        size_t sizeInBytes,
        const wchar_t *wcstr,
        size_t count);
    
    static void dirent_set_errno (int error);
    
    
    /*
     * Open directory stream DIRNAME for read and return a pointer to the
     * internal working area that is used to retrieve individual directory
     * entries.
     */
    static _WDIR*
    _wopendir(
        const wchar_t *dirname)
    {
        _WDIR *dirp;
        DWORD n;
        wchar_t *p;
    
        /* Must have directory name */
        if (dirname == NULL  ||  dirname[0] == '\0') {
            dirent_set_errno (ENOENT);
            return NULL;
        }
    
        /* Allocate new _WDIR structure */
        dirp = (_WDIR*) malloc (sizeof (struct _WDIR));
        if (!dirp) {
            return NULL;
        }
    
        /* Reset _WDIR structure */
        dirp->handle = INVALID_HANDLE_VALUE;
        dirp->patt = NULL;
        dirp->cached = 0;
    
        /*
         * Compute the length of full path plus zero terminator
         *
         * Note that on WinRT there's no way to convert relative paths
         * into absolute paths, so just assume it is an absolute path.
         */
    #if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
        /* Desktop */
        n = GetFullPathNameW (dirname, 0, NULL, NULL);
    #else
        /* WinRT */
        n = wcslen (dirname);
    #endif
    
        /* Allocate room for absolute directory name and search pattern */
        dirp->patt = (wchar_t*) malloc (sizeof (wchar_t) * n + 16);
        if (dirp->patt == NULL) {
            goto exit_closedir;
        }
    
        /*
         * Convert relative directory name to an absolute one.  This
         * allows rewinddir() to function correctly even when current
         * working directory is changed between opendir() and rewinddir().
         *
         * Note that on WinRT there's no way to convert relative paths
         * into absolute paths, so just assume it is an absolute path.
         */
    #if WINAPI_FAMILY_PARTITION(WINAPI_PARTITION_DESKTOP)
        /* Desktop */
        n = GetFullPathNameW (dirname, n, dirp->patt, NULL);
        if (n <= 0) {
            goto exit_closedir;
        }
    #else
        /* WinRT */
        wcsncpy_s (dirp->patt, n+1, dirname, n);
    #endif
    
        /* Append search pattern \* to the directory name */
        p = dirp->patt + n;
        switch (p[-1]) {
        case '\\':
        case '/':
        case ':':
            /* Directory ends in path separator, e.g. c:\temp\ */
            /*NOP*/;
            break;
    
        default:
            /* Directory name doesn't end in path separator */
            *p++ = '\\';
        }
        *p++ = '*';
        *p = '\0';
    
        /* Open directory stream and retrieve the first entry */
        if (!dirent_first (dirp)) {
            goto exit_closedir;
        }
    
        /* Success */
        return dirp;
    
        /* Failure */
    exit_closedir:
        _wclosedir (dirp);
        return NULL;
    }
    
    /*
     * Read next directory entry.
     *
     * Returns pointer to static directory entry which may be overwritten by
     * subsequent calls to _wreaddir().
     */
    static struct _wdirent*
    _wreaddir(
        _WDIR *dirp)
    {
        struct _wdirent *entry;
    
        /*
         * Read directory entry to buffer.  We can safely ignore the return value
         * as entry will be set to NULL in case of error.
         */
        (void) _wreaddir_r (dirp, &dirp->ent, &entry);
    
        /* Return pointer to statically allocated directory entry */
        return entry;
    }
    
    /*
     * Read next directory entry.
     *
     * Returns zero on success.  If end of directory stream is reached, then sets
     * result to NULL and returns zero.
     */
    static int
    _wreaddir_r(
        _WDIR *dirp,
        struct _wdirent *entry,
        struct _wdirent **result)
    {
        WIN32_FIND_DATAW *datap;
    
        /* Read next directory entry */
        datap = dirent_next (dirp);
        if (datap) {
            size_t n;
            DWORD attr;
    
            /*
             * Copy file name as wide-character string.  If the file name is too
             * long to fit in to the destination buffer, then truncate file name
             * to PATH_MAX characters and zero-terminate the buffer.
             */
            n = 0;
            while (n < PATH_MAX  &&  datap->cFileName[n] != 0) {
                entry->d_name[n] = datap->cFileName[n];
                n++;
            }
            entry->d_name[n] = 0;
    
            /* Length of file name excluding zero terminator */
            entry->d_namlen = n;
    
            /* File type */
            attr = datap->dwFileAttributes;
            if ((attr & FILE_ATTRIBUTE_DEVICE) != 0) {
                entry->d_type = DT_CHR;
            } else if ((attr & FILE_ATTRIBUTE_DIRECTORY) != 0) {
                entry->d_type = DT_DIR;
            } else {
                entry->d_type = DT_REG;
            }
    
            /* Reset dummy fields */
            entry->d_ino = 0;
            entry->d_off = 0;
            entry->d_reclen = sizeof (struct _wdirent);
    
            /* Set result address */
            *result = entry;
    
        } else {
    
            /* Return NULL to indicate end of directory */
            *result = NULL;
    
        }
    
        return /*OK*/0;
    }
    
    /*
     * Close directory stream opened by opendir() function.  This invalidates the
     * DIR structure as well as any directory entry read previously by
     * _wreaddir().
     */
    static int
    _wclosedir(
        _WDIR *dirp)
    {
        int ok;
        if (dirp) {
    
            /* Release search handle */
            if (dirp->handle != INVALID_HANDLE_VALUE) {
                FindClose (dirp->handle);
            }
    
            /* Release search pattern */
            free (dirp->patt);
    
            /* Release directory structure */
            free (dirp);
            ok = /*success*/0;
    
        } else {
    
            /* Invalid directory stream */
            dirent_set_errno (EBADF);
            ok = /*failure*/-1;
    
        }
        return ok;
    }
    
    /*
     * Rewind directory stream such that _wreaddir() returns the very first
     * file name again.
     */
    static void
    _wrewinddir(
        _WDIR* dirp)
    {
        if (dirp) {
            /* Release existing search handle */
            if (dirp->handle != INVALID_HANDLE_VALUE) {
                FindClose (dirp->handle);
            }
    
            /* Open new search handle */
            dirent_first (dirp);
        }
    }
    
    /* Get first directory entry (internal) */
    static WIN32_FIND_DATAW*
    dirent_first(
        _WDIR *dirp)
    {
        WIN32_FIND_DATAW *datap;
        DWORD error;
    
        /* Open directory and retrieve the first entry */
        dirp->handle = FindFirstFileExW(
            dirp->patt, FindExInfoStandard, &dirp->data,
            FindExSearchNameMatch, NULL, 0);
        if (dirp->handle != INVALID_HANDLE_VALUE) {
    
            /* a directory entry is now waiting in memory */
            datap = &dirp->data;
            dirp->cached = 1;
    
        } else {
    
            /* Failed to open directory: no directory entry in memory */
            dirp->cached = 0;
            datap = NULL;
    
            /* Set error code */
            error = GetLastError ();
            switch (error) {
            case ERROR_ACCESS_DENIED:
                /* No read access to directory */
                dirent_set_errno (EACCES);
                break;
    
            case ERROR_DIRECTORY:
                /* Directory name is invalid */
                dirent_set_errno (ENOTDIR);
                break;
    
            case ERROR_PATH_NOT_FOUND:
            default:
                /* Cannot find the file */
                dirent_set_errno (ENOENT);
            }
    
        }
        return datap;
    }
    
    /*
     * Get next directory entry (internal).
     *
     * Returns
     */
    static WIN32_FIND_DATAW*
    dirent_next(
        _WDIR *dirp)
    {
        WIN32_FIND_DATAW *p;
    
        /* Get next directory entry */
        if (dirp->cached != 0) {
    
            /* A valid directory entry already in memory */
            p = &dirp->data;
            dirp->cached = 0;
    
        } else if (dirp->handle != INVALID_HANDLE_VALUE) {
    
            /* Get the next directory entry from stream */
            if (FindNextFileW (dirp->handle, &dirp->data) != FALSE) {
                /* Got a file */
                p = &dirp->data;
            } else {
                /* The very last entry has been processed or an error occurred */
                FindClose (dirp->handle);
                dirp->handle = INVALID_HANDLE_VALUE;
                p = NULL;
            }
    
        } else {
    
            /* End of directory stream reached */
            p = NULL;
    
        }
    
        return p;
    }
    
    /*
     * Open directory stream using plain old C-string.
     */
    static DIR*
    opendir(
        const char *dirname)
    {
        struct DIR *dirp;
    
        /* Must have directory name */
        if (dirname == NULL  ||  dirname[0] == '\0') {
            dirent_set_errno (ENOENT);
            return NULL;
        }
    
        /* Allocate memory for DIR structure */
        dirp = (DIR*) malloc (sizeof (struct DIR));
        if (!dirp) {
            return NULL;
        }
        {
            int error;
            wchar_t wname[PATH_MAX + 1];
            size_t n;
    
            /* Convert directory name to wide-character string */
            error = dirent_mbstowcs_s(
                &n, wname, PATH_MAX + 1, dirname, PATH_MAX + 1);
            if (error) {
                /*
                 * Cannot convert file name to wide-character string.  This
                 * occurs if the string contains invalid multi-byte sequences or
                 * the output buffer is too small to contain the resulting
                 * string.
                 */
                goto exit_free;
            }
    
    
            /* Open directory stream using wide-character name */
            dirp->wdirp = _wopendir (wname);
            if (!dirp->wdirp) {
                goto exit_free;
            }
    
        }
    
        /* Success */
        return dirp;
    
        /* Failure */
    exit_free:
        free (dirp);
        return NULL;
    }
    
    /*
     * Read next directory entry.
     */
    static struct dirent*
    readdir(
        DIR *dirp)
    {
        struct dirent *entry;
    
        /*
         * Read directory entry to buffer.  We can safely ignore the return value
         * as entry will be set to NULL in case of error.
         */
        (void) readdir_r (dirp, &dirp->ent, &entry);
    
        /* Return pointer to statically allocated directory entry */
        return entry;
    }
    
    /*
     * Read next directory entry into called-allocated buffer.
     *
     * Returns zero on success.  If the end of directory stream is reached, then
     * sets result to NULL and returns zero.
     */
    static int
    readdir_r(
        DIR *dirp,
        struct dirent *entry,
        struct dirent **result)
    {
        WIN32_FIND_DATAW *datap;
    
        /* Read next directory entry */
        datap = dirent_next (dirp->wdirp);
        if (datap) {
            size_t n;
            int error;
    
            /* Attempt to convert file name to multi-byte string */
            error = dirent_wcstombs_s(
                &n, entry->d_name, PATH_MAX + 1, datap->cFileName, PATH_MAX + 1);
    
            /*
             * If the file name cannot be represented by a multi-byte string,
             * then attempt to use old 8+3 file name.  This allows traditional
             * Unix-code to access some file names despite of unicode
             * characters, although file names may seem unfamiliar to the user.
             *
             * Be ware that the code below cannot come up with a short file
             * name unless the file system provides one.  At least
             * VirtualBox shared folders fail to do this.
             */
            if (error  &&  datap->cAlternateFileName[0] != '\0') {
                error = dirent_wcstombs_s(
                    &n, entry->d_name, PATH_MAX + 1,
                    datap->cAlternateFileName, PATH_MAX + 1);
            }
    
            if (!error) {
                DWORD attr;
    
                /* Length of file name excluding zero terminator */
                entry->d_namlen = n - 1;
    
                /* File attributes */
                attr = datap->dwFileAttributes;
                if ((attr & FILE_ATTRIBUTE_DEVICE) != 0) {
                    entry->d_type = DT_CHR;
                } else if ((attr & FILE_ATTRIBUTE_DIRECTORY) != 0) {
                    entry->d_type = DT_DIR;
                } else {
                    entry->d_type = DT_REG;
                }
    
                /* Reset dummy fields */
                entry->d_ino = 0;
                entry->d_off = 0;
                entry->d_reclen = sizeof (struct dirent);
    
            } else {
    
                /*
                 * Cannot convert file name to multi-byte string so construct
                 * an erroneous directory entry and return that.  Note that
                 * we cannot return NULL as that would stop the processing
                 * of directory entries completely.
                 */
                entry->d_name[0] = '?';
                entry->d_name[1] = '\0';
                entry->d_namlen = 1;
                entry->d_type = DT_UNKNOWN;
                entry->d_ino = 0;
                entry->d_off = -1;
                entry->d_reclen = 0;
    
            }
    
            /* Return pointer to directory entry */
            *result = entry;
    
        } else {
    
            /* No more directory entries */
            *result = NULL;
    
        }
    
        return /*OK*/0;
    }
    
    /*
     * Close directory stream.
     */
    static int
    closedir(
        DIR *dirp)
    {
        int ok;
        if (dirp) {
    
            /* Close wide-character directory stream */
            ok = _wclosedir (dirp->wdirp);
            dirp->wdirp = NULL;
    
            /* Release multi-byte character version */
            free (dirp);
    
        } else {
    
            /* Invalid directory stream */
            dirent_set_errno (EBADF);
            ok = /*failure*/-1;
    
        }
        return ok;
    }
    
    /*
     * Rewind directory stream to beginning.
     */
    static void
    rewinddir(
        DIR* dirp)
    {
        /* Rewind wide-character string directory stream */
        _wrewinddir (dirp->wdirp);
    }
    
    /*
     * Scan directory for entries.
     */
    static int
    scandir(
        const char *dirname,
        struct dirent ***namelist,
        int (*filter)(const struct dirent*),
        int (*compare)(const struct dirent**, const struct dirent**))
    {
        struct dirent **files = NULL;
        size_t size = 0;
        size_t allocated = 0;
        const size_t init_size = 1;
        DIR *dir = NULL;
        struct dirent *entry;
        struct dirent *tmp = NULL;
        size_t i;
        int result = 0;
    
        /* Open directory stream */
        dir = opendir (dirname);
        if (dir) {
    
            /* Read directory entries to memory */
            while (1) {
    
                /* Enlarge pointer table to make room for another pointer */
                if (size >= allocated) {
                    void *p;
                    size_t num_entries;
    
                    /* Compute number of entries in the enlarged pointer table */
                    if (size < init_size) {
                        /* Allocate initial pointer table */
                        num_entries = init_size;
                    } else {
                        /* Double the size */
                        num_entries = size * 2;
                    }
    
                    /* Allocate first pointer table or enlarge existing table */
                    p = realloc (files, sizeof (void*) * num_entries);
                    if (p != NULL) {
                        /* Got the memory */
                        files = (dirent**) p;
                        allocated = num_entries;
                    } else {
                        /* Out of memory */
                        result = -1;
                        break;
                    }
    
                }
    
                /* Allocate room for temporary directory entry */
                if (tmp == NULL) {
                    tmp = (struct dirent*) malloc (sizeof (struct dirent));
                    if (tmp == NULL) {
                        /* Cannot allocate temporary directory entry */
                        result = -1;
                        break;
                    }
                }
    
                /* Read directory entry to temporary area */
                if (readdir_r (dir, tmp, &entry) == /*OK*/0) {
    
                    /* Did we get an entry? */
                    if (entry != NULL) {
                        int pass;
    
                        /* Determine whether to include the entry in result */
                        if (filter) {
                            /* Let the filter function decide */
                            pass = filter (tmp);
                        } else {
                            /* No filter function, include everything */
                            pass = 1;
                        }
    
                        if (pass) {
                            /* Store the temporary entry to pointer table */
                            files[size++] = tmp;
                            tmp = NULL;
    
                            /* Keep up with the number of files */
                            result++;
                        }
    
                    } else {
    
                        /*
                         * End of directory stream reached => sort entries and
                         * exit.
                         */
                        qsort (files, size, sizeof (void*),
                            (int (*) (const void*, const void*)) compare);
                        break;
    
                    }
    
                } else {
                    /* Error reading directory entry */
                    result = /*Error*/ -1;
                    break;
                }
    
            }
    
        } else {
            /* Cannot open directory */
            result = /*Error*/ -1;
        }
    
        /* Release temporary directory entry */
        free (tmp);
    
        /* Release allocated memory on error */
        if (result < 0) {
            for (i = 0; i < size; i++) {
                free (files[i]);
            }
            free (files);
            files = NULL;
        }
    
        /* Close directory stream */
        if (dir) {
            closedir (dir);
        }
    
        /* Pass pointer table to caller */
        if (namelist) {
            *namelist = files;
        }
        return result;
    }
    
    /* Alphabetical sorting */
    static int
    alphasort(
        const struct dirent **a, const struct dirent **b)
    {
        return strcoll ((*a)->d_name, (*b)->d_name);
    }
    
    /* Sort versions */
    static int
    versionsort(
        const struct dirent **a, const struct dirent **b)
    {
        /* FIXME: implement strverscmp and use that */
        return alphasort (a, b);
    }
    
    /* Convert multi-byte string to wide character string */
    static int
    dirent_mbstowcs_s(
        size_t *pReturnValue,
        wchar_t *wcstr,
        size_t sizeInWords,
        const char *mbstr,
        size_t count)
    {
        int error;
    
    #if defined(_MSC_VER)  &&  _MSC_VER >= 1400
    
        /* Microsoft Visual Studio 2005 or later */
        error = mbstowcs_s (pReturnValue, wcstr, sizeInWords, mbstr, count);
    
    #else
    
        /* Older Visual Studio or non-Microsoft compiler */
        size_t n;
    
        /* Convert to wide-character string (or count characters) */
        n = mbstowcs (wcstr, mbstr, sizeInWords);
        if (!wcstr  ||  n < count) {
    
            /* Zero-terminate output buffer */
            if (wcstr  &&  sizeInWords) {
                if (n >= sizeInWords) {
                    n = sizeInWords - 1;
                }
                wcstr[n] = 0;
            }
    
            /* Length of resulting multi-byte string WITH zero terminator */
            if (pReturnValue) {
                *pReturnValue = n + 1;
            }
    
            /* Success */
            error = 0;
    
        } else {
    
            /* Could not convert string */
            error = 1;
    
        }
    
    #endif
        return error;
    }
    
    /* Convert wide-character string to multi-byte string */
    static int
    dirent_wcstombs_s(
        size_t *pReturnValue,
        char *mbstr,
        size_t sizeInBytes, /* max size of mbstr */
        const wchar_t *wcstr,
        size_t count)
    {
        int error;
    
    #if defined(_MSC_VER)  &&  _MSC_VER >= 1400
    
        /* Microsoft Visual Studio 2005 or later */
        error = wcstombs_s (pReturnValue, mbstr, sizeInBytes, wcstr, count);
    
    #else
    
        /* Older Visual Studio or non-Microsoft compiler */
        size_t n;
    
        /* Convert to multi-byte string (or count the number of bytes needed) */
        n = wcstombs (mbstr, wcstr, sizeInBytes);
        if (!mbstr  ||  n < count) {
    
            /* Zero-terminate output buffer */
            if (mbstr  &&  sizeInBytes) {
                if (n >= sizeInBytes) {
                    n = sizeInBytes - 1;
                }
                mbstr[n] = '\0';
            }
    
            /* Length of resulting multi-bytes string WITH zero-terminator */
            if (pReturnValue) {
                *pReturnValue = n + 1;
            }
    
            /* Success */
            error = 0;
    
        } else {
    
            /* Cannot convert string */
            error = 1;
    
        }
    
    #endif
        return error;
    }
    
    /* Set errno variable */
    static void
    dirent_set_errno(
        int error)
    {
    #if defined(_MSC_VER)  &&  _MSC_VER >= 1400
    
        /* Microsoft Visual Studio 2005 and later */
        _set_errno (error);
    
    #else
    
        /* Non-Microsoft compiler or older Microsoft compiler */
        errno = error;
    
    #endif
    }
    
    
    #ifdef __cplusplus
    }
    #endif
    #endif /*DIRENT_H*/
    
    

    4 具体步骤

    1. 上述代码复制到文件中,保存为dirent.h
    2. dirent.h文件放入include文件夹内,如:
      D:\Program Files\Microsoft Visual Studio\VC\include

    5 参考链接

    1. windows兼容dirent.h
    2. Gihub下载地址
    展开全文
  • dirent.h使用详解

    2021-09-28 10:53:32
    dirent.h> DIR *opendir(const char *dirname); struct dirent *readdir(DIR *dirp); int closedir(DIR *dirp); opendir用于打开目录,是类似于流的那种方式,返回一个指向DIR结构体的指针,参数*dirname是一个...

    Linux下遍历目录的方法,打开目录,读取目录,关闭目录
    opendir -> readdir -> closedir
    函数原型:

    #include <dirent.h>
    DIR *opendir(const char *dirname);
    struct dirent *readdir(DIR *dirp);
    int closedir(DIR *dirp);
    

    opendir用于打开目录,是类似于流的那种方式,返回一个指向DIR结构体的指针,参数*dirname是一个字符数组或者字符串常量;

    readdir函数用于读取目录,只有一个参数,就是opendir返回的结构体指针

    closedir用于关闭DIR结构体指针

    DIR结构体定义:

    struct __dirstream   
    {   
        void *__fd;    
        char *__data;    
        int __entry_data;    
        char *__ptr;    
        int __entry_ptr;    
        size_t __allocation;    
        size_t __size;    
        __libc_lock_define (, __lock)    
    };   
    typedef struct __dirstream DIR;  
    

    dirent结构体定义:

    struct dirent
    {
    long d_ino;                     
    off_t d_off;                    
    unsigned short d_reclen;        
    char d_name [NAME_MAX+1];       
    }
    

    d_ino存放的是该文件的索引节点号inode;
    d_off 是文件在目录中的编移,具体是什么意思也不是很明白,很少用到它,
    基本上就是用到d_name
    short d_reclen是这个文件的长度,需要注意的是这里的长度并不是指文件大小,因为大小和长度是两回回事了,你可以用lseek将文件长度移得很长,但大小其实还是那么大。
    最后一个,文件名称。

    通过readdir函数读取到的文件名存储在结构体dirent的d_name成员中,而函数
    int stat(const char *file_name, struct stat *buf);的作用就是获取文件名为d_name的文件的详细信息,存储在stat结构体中。
    stat结构体定义:

    struct stat {   
            mode_t     st_mode;       //文件访问权限   
            ino_t      st_ino;       //索引节点号   
            dev_t      st_dev;        //文件使用的设备号   
            dev_t      st_rdev;       //设备文件的设备号   
            nlink_t    st_nlink;      //文件的硬连接数   
            uid_t      st_uid;        //所有者用户识别号   
            gid_t      st_gid;        //组识别号   
            off_t      st_size;       //以字节为单位的文件容量   
            time_t     st_atime;      //最后一次访问该文件的时间   
            time_t     st_mtime;      //最后一次修改该文件的时间    
            time_t     st_ctime;      //最后一次改变该文件状态的时间   
            blksize_t st_blksize;    //包含该文件的磁盘块的大小   
            blkcnt_t   st_blocks;     //该文件所占的磁盘块   
          };  
    

    事例:

    #include <stdio.h>
    #include <stdlib.h>
    #include <sys/types.h>
    #include <unistd.h>
    #include <dirent.h>
    void print_usage(void);
    
    void print_usage(void)
    {
        printf("Usage: test dirname\n");
    }
    
    int main(int argc,char *argv[])
    {
        DIR * dp;
        struct dirent *filename;
        if (argc < 2)
        {
            print_usage();
            exit(1);
        }
    
        dp = opendir(argv[1]);
        if (!dp)
        {
            fprintf(stderr,"open directory error\n");
            return 0;
        }
        while (filename = readdir(dp))
        {
            printf("filename:%-10s\td_info:%ld\t d_reclen:%us\n",
            filename->d_name,filename->d_ino,filename->d_reclen);
        }
        closedir(dp);
        return 0;
    }
    

    运行结果:
    在这里插入图片描述

    展开全文
  • dirent.h和dirent.c下载

    千次阅读 2019-02-24 09:58:15
    从github down了一个工程,MS编译报找不到direct.h,网上搜索,借鉴https://blog.csdn.net/yapingxin/article/details/51444133和http://www.two-sdg.demon.co.uk/curbralan/code/dirent/dirent.html,下载对应代码...
  • 从上述定义也能够看出来,dirent结构体存储的关于文件的信息很少,所以dirent同样也是起着一个索引的作用,如果想获得类似ls -l那种效果的文件信息,必须要靠stat函数了。 通过readdir函数读取到的文件名存储在...
  • dirent

    2011-06-27 23:52:45
    direntdirentdirentdirentdirentdirentdirentdirentdirentdirentdirentdirent
  • dirent分析 头文件的路径如下所示:/src/include/port/win32_msvc/dirent.h。该文件主要是win32 native目录操作函数的封装。从源代码目录接口可以看出该文件主要作用是针对win32_msvc的移植文件,这里的port就是移植...
  • 一、struct dirent 1、包含头文件 #include <dirent.h> 2、struct dirent 结构 struct dirent { long d_ino; /* inode number 索引节点号 */ off_t d_off; /* offset to this dirent 在目录文件中...
  • C语言中的dirent.h说明

    2020-11-19 17:26:56
    dirent.h是用于目录操作的头文件,linux 默认在/usr/include目录下(会自动包含其他文件),常见的方法如下: opendir() 打开目录,并返回句柄 readdir() 读取句柄,返回dirent结构体 telldir() 返回当前指针...
  • 1: #path:要遍历的文件夹路径 ...dirent.h> void GetFileNames(string path, vector<string>& filenames) { DIR *pDir; struct dirent* ptr; if (!(pDir = opendir(path.c_str()))) ...
  • dirent.h windows安装

    2020-06-01 02:57:17
      进入下载页面后选择最新的dirent.h文件,目前最新的是dirent-1.21.zip,下载完成后解压,将include文件夹下的dirent.h文件复制到VS安装目录下,比如VS2013,就复制到"VC\include"下面,VS2019则要复制到"\VC\...
  • dirent结构体 struct dirent { ino_t d_ino; /* inode number*/ off_t d_off; /* offset to the next dirent */ unsigned short d_reclen; /* length of this record 本条记录的长度*/ unsig...
  • struct dirent { long d_ino; /* inode number */ off_t d_off; /* offset to this dirent */ unsigned short d_reclen; /* length of this d_name */ char d_nam
  • Linux:struct dirent

    2018-12-27 19:16:31
    vi /usr/include/dirent.h 部分内容: /* This file defines `struct dirent'. It defines the macro `_DIRENT_HAVE_D_NAMLEN' iff there is a `d_namlen' member that gives the length of `d_name'. It def....

空空如也

空空如也

1 2 3 4 5 ... 20
收藏数 14,536
精华内容 5,814
关键字:

dirent