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1160 lines
27 KiB
1160 lines
27 KiB
/* |
|
* Dirent interface for Microsoft Visual Studio |
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* Version 1.23.1 |
|
* |
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* Copyright (C) 2006-2012 Toni Ronkko |
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* This file is part of dirent. Dirent may be freely distributed |
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* under the MIT license. For all details and documentation, see |
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* https://github.com/tronkko/dirent |
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*/ |
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#ifndef DIRENT_H |
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#define DIRENT_H |
|
|
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/* |
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* Include windows.h without Windows Sockets 1.1 to prevent conflicts with |
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* Windows Sockets 2.0. |
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*/ |
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#ifndef WIN32_LEAN_AND_MEAN |
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# define WIN32_LEAN_AND_MEAN |
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#endif |
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#include <windows.h> |
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|
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#include <stdio.h> |
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#include <stdarg.h> |
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#include <wchar.h> |
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#include <string.h> |
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#include <stdlib.h> |
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#include <malloc.h> |
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#include <sys/types.h> |
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#include <sys/stat.h> |
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#include <errno.h> |
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|
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/* Indicates that d_type field is available in dirent structure */ |
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#define _DIRENT_HAVE_D_TYPE |
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|
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/* Indicates that d_namlen field is available in dirent structure */ |
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#define _DIRENT_HAVE_D_NAMLEN |
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|
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/* Entries missing from MSVC 6.0 */ |
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#if !defined(FILE_ATTRIBUTE_DEVICE) |
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# define FILE_ATTRIBUTE_DEVICE 0x40 |
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#endif |
|
|
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/* File type and permission flags for stat(), general mask */ |
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#if !defined(S_IFMT) |
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# define S_IFMT _S_IFMT |
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#endif |
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|
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/* Directory bit */ |
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#if !defined(S_IFDIR) |
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# define S_IFDIR _S_IFDIR |
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#endif |
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|
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/* Character device bit */ |
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#if !defined(S_IFCHR) |
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# define S_IFCHR _S_IFCHR |
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#endif |
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|
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/* Pipe bit */ |
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#if !defined(S_IFFIFO) |
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# define S_IFFIFO _S_IFFIFO |
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#endif |
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|
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/* Regular file bit */ |
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#if !defined(S_IFREG) |
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# define S_IFREG _S_IFREG |
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#endif |
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|
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/* Read permission */ |
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#if !defined(S_IREAD) |
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# define S_IREAD _S_IREAD |
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#endif |
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|
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/* Write permission */ |
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#if !defined(S_IWRITE) |
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# define S_IWRITE _S_IWRITE |
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#endif |
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|
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/* Execute permission */ |
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#if !defined(S_IEXEC) |
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# define S_IEXEC _S_IEXEC |
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#endif |
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|
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/* Pipe */ |
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#if !defined(S_IFIFO) |
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# define S_IFIFO _S_IFIFO |
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#endif |
|
|
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/* Block device */ |
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#if !defined(S_IFBLK) |
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# define S_IFBLK 0 |
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#endif |
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|
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/* Link */ |
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#if !defined(S_IFLNK) |
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# define S_IFLNK 0 |
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#endif |
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|
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/* Socket */ |
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#if !defined(S_IFSOCK) |
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# define S_IFSOCK 0 |
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#endif |
|
|
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/* Read user permission */ |
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#if !defined(S_IRUSR) |
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# define S_IRUSR S_IREAD |
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#endif |
|
|
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/* Write user permission */ |
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#if !defined(S_IWUSR) |
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# define S_IWUSR S_IWRITE |
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#endif |
|
|
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/* Execute user permission */ |
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#if !defined(S_IXUSR) |
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# define S_IXUSR 0 |
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#endif |
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|
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/* Read group permission */ |
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#if !defined(S_IRGRP) |
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# define S_IRGRP 0 |
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#endif |
|
|
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/* Write group permission */ |
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#if !defined(S_IWGRP) |
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# define S_IWGRP 0 |
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#endif |
|
|
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/* Execute group permission */ |
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#if !defined(S_IXGRP) |
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# define S_IXGRP 0 |
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#endif |
|
|
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/* Read others permission */ |
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#if !defined(S_IROTH) |
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# define S_IROTH 0 |
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#endif |
|
|
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/* Write others permission */ |
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#if !defined(S_IWOTH) |
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# define S_IWOTH 0 |
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#endif |
|
|
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/* Execute others permission */ |
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#if !defined(S_IXOTH) |
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# define S_IXOTH 0 |
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#endif |
|
|
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/* Maximum length of file name */ |
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#if !defined(PATH_MAX) |
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# define PATH_MAX MAX_PATH |
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#endif |
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#if !defined(FILENAME_MAX) |
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# define FILENAME_MAX MAX_PATH |
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#endif |
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#if !defined(NAME_MAX) |
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# define NAME_MAX FILENAME_MAX |
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#endif |
|
|
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/* File type flags for d_type */ |
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#define DT_UNKNOWN 0 |
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#define DT_REG S_IFREG |
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#define DT_DIR S_IFDIR |
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#define DT_FIFO S_IFIFO |
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#define DT_SOCK S_IFSOCK |
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#define DT_CHR S_IFCHR |
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#define DT_BLK S_IFBLK |
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#define DT_LNK S_IFLNK |
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|
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/* Macros for converting between st_mode and d_type */ |
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#define IFTODT(mode) ((mode) & S_IFMT) |
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#define DTTOIF(type) (type) |
|
|
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/* |
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* 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 |
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* only defined for compatibility. These macros should always return false |
|
* on Windows. |
|
*/ |
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#if !defined(S_ISFIFO) |
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# define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFIFO) |
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#endif |
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#if !defined(S_ISDIR) |
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# define S_ISDIR(mode) (((mode) & S_IFMT) == S_IFDIR) |
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#endif |
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#if !defined(S_ISREG) |
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# define S_ISREG(mode) (((mode) & S_IFMT) == S_IFREG) |
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#endif |
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#if !defined(S_ISLNK) |
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# define S_ISLNK(mode) (((mode) & S_IFMT) == S_IFLNK) |
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#endif |
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#if !defined(S_ISSOCK) |
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# define S_ISSOCK(mode) (((mode) & S_IFMT) == S_IFSOCK) |
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#endif |
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#if !defined(S_ISCHR) |
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# define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR) |
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#endif |
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#if !defined(S_ISBLK) |
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# define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK) |
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#endif |
|
|
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/* Return the exact length of the file name without zero terminator */ |
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#define _D_EXACT_NAMLEN(p) ((p)->d_namlen) |
|
|
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/* Return the maximum size of a file name */ |
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#define _D_ALLOC_NAMLEN(p) ((PATH_MAX)+1) |
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|
|
|
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#ifdef __cplusplus |
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extern "C" { |
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#endif |
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|
|
|
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/* Wide-character version */ |
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struct _wdirent { |
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/* Always zero */ |
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long d_ino; |
|
|
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/* File position within stream */ |
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long d_off; |
|
|
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/* Structure size */ |
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unsigned short d_reclen; |
|
|
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/* Length of name without \0 */ |
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size_t d_namlen; |
|
|
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/* File type */ |
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int d_type; |
|
|
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/* File name */ |
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wchar_t d_name[PATH_MAX+1]; |
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}; |
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typedef struct _wdirent _wdirent; |
|
|
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struct _WDIR { |
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/* Current directory entry */ |
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struct _wdirent ent; |
|
|
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/* Private file data */ |
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WIN32_FIND_DATAW data; |
|
|
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/* True if data is valid */ |
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int cached; |
|
|
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/* Win32 search handle */ |
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HANDLE handle; |
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|
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/* Initial directory name */ |
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wchar_t *patt; |
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}; |
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typedef struct _WDIR _WDIR; |
|
|
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/* Multi-byte character version */ |
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struct dirent { |
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/* Always zero */ |
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long d_ino; |
|
|
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/* File position within stream */ |
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long d_off; |
|
|
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/* Structure size */ |
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unsigned short d_reclen; |
|
|
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/* Length of name without \0 */ |
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size_t d_namlen; |
|
|
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/* File type */ |
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int d_type; |
|
|
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/* File name */ |
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char d_name[PATH_MAX+1]; |
|
}; |
|
typedef struct dirent dirent; |
|
|
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struct DIR { |
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struct dirent ent; |
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struct _WDIR *wdirp; |
|
}; |
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typedef struct DIR DIR; |
|
|
|
|
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/* Dirent functions */ |
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static DIR *opendir (const char *dirname); |
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static _WDIR *_wopendir (const wchar_t *dirname); |
|
|
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static struct dirent *readdir (DIR *dirp); |
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static struct _wdirent *_wreaddir (_WDIR *dirp); |
|
|
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static int readdir_r( |
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DIR *dirp, struct dirent *entry, struct dirent **result); |
|
static int _wreaddir_r( |
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_WDIR *dirp, struct _wdirent *entry, struct _wdirent **result); |
|
|
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static int closedir (DIR *dirp); |
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static int _wclosedir (_WDIR *dirp); |
|
|
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static void rewinddir (DIR* dirp); |
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static void _wrewinddir (_WDIR* dirp); |
|
|
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static int scandir (const char *dirname, struct dirent ***namelist, |
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int (*filter)(const struct dirent*), |
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int (*compare)(const struct dirent**, const struct dirent**)); |
|
|
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static int alphasort (const struct dirent **a, const struct dirent **b); |
|
|
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static int versionsort (const struct dirent **a, const struct dirent **b); |
|
|
|
|
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/* For compatibility with Symbian */ |
|
#define wdirent _wdirent |
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#define WDIR _WDIR |
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#define wopendir _wopendir |
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#define wreaddir _wreaddir |
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#define wclosedir _wclosedir |
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#define wrewinddir _wrewinddir |
|
|
|
|
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/* Internal utility functions */ |
|
static WIN32_FIND_DATAW *dirent_first (_WDIR *dirp); |
|
static WIN32_FIND_DATAW *dirent_next (_WDIR *dirp); |
|
|
|
static int dirent_mbstowcs_s( |
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size_t *pReturnValue, |
|
wchar_t *wcstr, |
|
size_t sizeInWords, |
|
const char *mbstr, |
|
size_t count); |
|
|
|
static int dirent_wcstombs_s( |
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size_t *pReturnValue, |
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char *mbstr, |
|
size_t sizeInBytes, |
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const wchar_t *wcstr, |
|
size_t count); |
|
|
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static void dirent_set_errno (int error); |
|
|
|
|
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/* |
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* Open directory stream DIRNAME for read and return a pointer to the |
|
* internal working area that is used to retrieve individual directory |
|
* entries. |
|
*/ |
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static _WDIR* |
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_wopendir( |
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const wchar_t *dirname) |
|
{ |
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_WDIR *dirp = NULL; |
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int error; |
|
|
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/* Must have directory name */ |
|
if (dirname == NULL || dirname[0] == '\0') { |
|
dirent_set_errno (ENOENT); |
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return NULL; |
|
} |
|
|
|
/* Allocate new _WDIR structure */ |
|
dirp = (_WDIR*) malloc (sizeof (struct _WDIR)); |
|
if (dirp != NULL) { |
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DWORD n; |
|
|
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/* Reset _WDIR structure */ |
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dirp->handle = INVALID_HANDLE_VALUE; |
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dirp->patt = NULL; |
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dirp->cached = 0; |
|
|
|
/* Compute the length of full path plus zero terminator |
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* |
|
* Note that on WinRT there's no way to convert relative paths |
|
* into absolute paths, so just assume it is an absolute path. |
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*/ |
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# if defined(WINAPI_FAMILY) && (WINAPI_FAMILY == WINAPI_FAMILY_PHONE_APP) |
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n = wcslen(dirname); |
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# else |
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n = GetFullPathNameW (dirname, 0, NULL, NULL); |
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# endif |
|
|
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/* Allocate room for absolute directory name and search pattern */ |
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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(). |
|
* |
|
* Note that on WinRT there's no way to convert relative paths |
|
* into absolute paths, so just assume it is an absolute path. |
|
*/ |
|
# if defined(WINAPI_FAMILY) && (WINAPI_FAMILY == WINAPI_FAMILY_PHONE_APP) |
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wcsncpy_s(dirp->patt, n+1, dirname, n); |
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# else |
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n = GetFullPathNameW (dirname, n, dirp->patt, NULL); |
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# endif |
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if (n > 0) { |
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wchar_t *p; |
|
|
|
/* Append search pattern \* to the directory name */ |
|
p = dirp->patt + n; |
|
if (dirp->patt < p) { |
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switch (p[-1]) { |
|
case '\\': |
|
case '/': |
|
case ':': |
|
/* Directory ends in path separator, e.g. c:\temp\ */ |
|
/*NOP*/; |
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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. |
|
* |
|
* 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); |
|
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 = 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 re-open directory: no directory entry in memory */ |
|
dirp->cached = 0; |
|
datap = NULL; |
|
|
|
} |
|
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; |
|
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 + 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) { |
|
|
|
/* 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. |
|
*/ |
|
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 */ |
|
if (tmp) { |
|
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*/ |
|
|
|
|