dirent.h implementation for MSVC
This implementation is a bit limited, does not support wide characters directories but it's a temporal solution... This solution uses "io.h" (like MinGW provided one) while other modern solutions use the "windows.h", that result in duplicate symbols issues... need to review it carefully.
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Ray
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src/external/dirent.h
vendored
278
src/external/dirent.h
vendored
@ -1,127 +1,199 @@
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#ifndef DIRENT_H
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#define DIRENT_H
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/*
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* DIRENT.H (formerly DIRLIB.H)
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* This file has no copyright assigned and is placed in the Public Domain.
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* This file is part of the mingw-runtime package.
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* No warranty is given; refer to the file DISCLAIMER within the package.
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*
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*/
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#ifndef _DIRENT_H_
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#define _DIRENT_H_
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Declaration of POSIX directory browsing functions and types for Win32.
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/* All the headers include this file. */
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#include <crtdefs.h>
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#include <io.h>
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#ifndef RC_INVOKED
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#pragma pack(push,_CRT_PACKING)
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Author: Kevlin Henney (kevlin@acm.org, kevlin@curbralan.com)
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History: Created March 1997. Updated June 2003.
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Rights: See end of file.
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*/
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#ifdef __cplusplus
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extern "C" {
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extern "C"
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{
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#endif
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typedef struct DIR DIR;
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struct dirent
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{
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long d_ino; /* Always zero. */
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unsigned short d_reclen; /* Always zero. */
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unsigned short d_namlen; /* Length of name in d_name. */
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char d_name[260]; /* [FILENAME_MAX] */ /* File name. */
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char *d_name;
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};
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/*
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* This is an internal data structure. Good programmers will not use it
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* except as an argument to one of the functions below.
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* dd_stat field is now int (was short in older versions).
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*/
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typedef struct
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{
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/* disk transfer area for this dir */
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struct _finddata_t dd_dta;
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/* dirent struct to return from dir (NOTE: this makes this thread
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* safe as long as only one thread uses a particular DIR struct at
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* a time) */
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struct dirent dd_dir;
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/* _findnext handle */
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intptr_t dd_handle;
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/*
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* Status of search:
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* 0 = not started yet (next entry to read is first entry)
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* -1 = off the end
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* positive = 0 based index of next entry
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*/
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int dd_stat;
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/* given path for dir with search pattern (struct is extended) */
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char dd_name[1];
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} DIR;
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DIR* __cdecl __MINGW_NOTHROW opendir (const char*);
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struct dirent* __cdecl __MINGW_NOTHROW readdir (DIR*);
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int __cdecl __MINGW_NOTHROW closedir (DIR*);
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void __cdecl __MINGW_NOTHROW rewinddir (DIR*);
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long __cdecl __MINGW_NOTHROW telldir (DIR*);
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void __cdecl __MINGW_NOTHROW seekdir (DIR*, long);
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/* wide char versions */
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struct _wdirent
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{
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long d_ino; /* Always zero. */
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unsigned short d_reclen; /* Always zero. */
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unsigned short d_namlen; /* Length of name in d_name. */
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wchar_t d_name[260]; /* [FILENAME_MAX] */ /* File name. */
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};
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DIR *opendir(const char *);
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int closedir(DIR *);
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struct dirent *readdir(DIR *);
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void rewinddir(DIR *);
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/*
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* This is an internal data structure. Good programmers will not use it
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* except as an argument to one of the functions below.
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*/
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typedef struct
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{
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/* disk transfer area for this dir */
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struct _wfinddata_t dd_dta;
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/* dirent struct to return from dir (NOTE: this makes this thread
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* safe as long as only one thread uses a particular DIR struct at
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* a time) */
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struct _wdirent dd_dir;
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Copyright Kevlin Henney, 1997, 2003. All rights reserved.
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/* _findnext handle */
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intptr_t dd_handle;
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose is hereby granted without fee, provided
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that this copyright and permissions notice appear in all copies and
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derivatives.
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This software is supplied "as is" without express or implied warranty.
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/*
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* Status of search:
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* 0 = not started yet (next entry to read is first entry)
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* -1 = off the end
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* positive = 0 based index of next entry
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*/
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int dd_stat;
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But that said, if there are any problems please get in touch.
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/* given path for dir with search pattern (struct is extended) */
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wchar_t dd_name[1];
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} _WDIR;
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*/
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_WDIR* __cdecl __MINGW_NOTHROW _wopendir (const wchar_t*);
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struct _wdirent* __cdecl __MINGW_NOTHROW _wreaddir (_WDIR*);
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int __cdecl __MINGW_NOTHROW _wclosedir (_WDIR*);
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void __cdecl __MINGW_NOTHROW _wrewinddir (_WDIR*);
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long __cdecl __MINGW_NOTHROW _wtelldir (_WDIR*);
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void __cdecl __MINGW_NOTHROW _wseekdir (_WDIR*, long);
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#ifdef __cplusplus
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#ifdef __cplusplus
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}
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#endif
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#pragma pack(pop)
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#endif // DIRENT_H
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#endif /* Not RC_INVOKED */
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/*
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#endif /* Not _DIRENT_H_ */
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Implementation of POSIX directory browsing functions and types for Win32.
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Author: Kevlin Henney (kevlin@acm.org, kevlin@curbralan.com)
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History: Created March 1997. Updated June 2003 and July 2012.
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Rights: See end of file.
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*/
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#include <dirent.h>
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#include <errno.h>
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#include <io.h> /* _findfirst and _findnext set errno iff they return -1 */
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#include <stdlib.h>
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#include <string.h>
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#ifdef __cplusplus
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extern "C"
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{
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#endif
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typedef ptrdiff_t handle_type; /* C99's intptr_t not sufficiently portable */
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struct DIR
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{
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handle_type handle; /* -1 for failed rewind */
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struct _finddata_t info;
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struct dirent result; /* d_name null iff first time */
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char *name; /* null-terminated char string */
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};
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DIR *opendir(const char *name)
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{
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DIR *dir = 0;
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if(name && name[0])
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{
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size_t base_length = strlen(name);
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const char *all = /* search pattern must end with suitable wildcard */
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strchr("/\\", name[base_length - 1]) ? "*" : "/*";
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if((dir = (DIR *) malloc(sizeof *dir)) != 0 &&
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(dir->name = (char *) malloc(base_length + strlen(all) + 1)) != 0)
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{
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strcat(strcpy(dir->name, name), all);
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if((dir->handle =
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(handle_type) _findfirst(dir->name, &dir->info)) != -1)
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{
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dir->result.d_name = 0;
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}
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else /* rollback */
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{
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free(dir->name);
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free(dir);
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dir = 0;
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}
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}
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else /* rollback */
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{
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free(dir);
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dir = 0;
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errno = ENOMEM;
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}
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}
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else
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{
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errno = EINVAL;
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}
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return dir;
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}
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int closedir(DIR *dir)
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{
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int result = -1;
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if(dir)
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{
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if(dir->handle != -1)
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{
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result = _findclose(dir->handle);
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}
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free(dir->name);
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free(dir);
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}
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if(result == -1) /* map all errors to EBADF */
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{
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errno = EBADF;
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}
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return result;
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}
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struct dirent *readdir(DIR *dir)
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{
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struct dirent *result = 0;
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if(dir && dir->handle != -1)
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{
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if(!dir->result.d_name || _findnext(dir->handle, &dir->info) != -1)
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{
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result = &dir->result;
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result->d_name = dir->info.name;
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}
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}
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else
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{
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errno = EBADF;
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}
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return result;
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}
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void rewinddir(DIR *dir)
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{
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if(dir && dir->handle != -1)
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{
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_findclose(dir->handle);
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dir->handle = (handle_type) _findfirst(dir->name, &dir->info);
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dir->result.d_name = 0;
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}
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else
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{
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errno = EBADF;
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}
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}
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#ifdef __cplusplus
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}
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#endif
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/*
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Copyright Kevlin Henney, 1997, 2003, 2012. All rights reserved.
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Permission to use, copy, modify, and distribute this software and its
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documentation for any purpose is hereby granted without fee, provided
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that this copyright and permissions notice appear in all copies and
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derivatives.
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This software is supplied "as is" without express or implied warranty.
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But that said, if there are any problems please get in touch.
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*/
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