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Update dirent.h win32 implementation

This commit is contained in:
Berke Viktor 2013-05-20 00:22:20 +02:00
parent 8655c4b007
commit 8a9d3e21f2
1 changed files with 392 additions and 198 deletions
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590
src/dirent/dirent-win32.h
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@ -23,16 +23,19 @@
* OTHER DEALINGS IN THE SOFTWARE.
*
*
* Version 1.13, Dec 12 2012, Toni Ronkko
* Use traditional 8+3 file name if the name cannot be represented in the
* default ANSI code page. Now compiles again with MSVC 6.0. Thanks to
* Konstantin Khomoutov for testing.
*
* Version 1.12.1, Oct 1 2012, Toni Ronkko
* Bug fix: renamed wide-character DIR structure _wDIR to _WDIR (with
* capital W) in order to maintain compatibility with MingW.
*
* Version 1.12, Sep 30 2012, Toni Ronkko
* Define PATH_MAX and NAME_MAX.
*
* Added wide-character variants _wDIR, _wdirent, _wopendir(),
* _wreaddir(), _wclosedir() and _wrewinddir(). Thanks to Edgar Buerkle
* and Jan Nijtmans for ideas and code.
* Define PATH_MAX and NAME_MAX. Added wide-character variants _wDIR,
* _wdirent, _wopendir(), _wreaddir(), _wclosedir() and _wrewinddir().
* Thanks to Edgar Buerkle and Jan Nijtmans for ideas and code.
*
* Do not include windows.h. This allows dirent.h to be integrated more
* easily into programs using winsock. Thanks to Fernando Azaldegui.
@ -90,44 +93,68 @@
#define DIRENT_H
#if !defined(_68K_) && !defined(_MPPC_) && !defined(_X86_) && !defined(_IA64_) && !defined(_AMD64_) && defined(_M_IX86)
#define _X86_
# define _X86_
#endif
#include <stdio.h>
#include <stdarg.h>
#include <windef.h>
#include <winbase.h>
#include <wchar.h>
#include <winnls.h>
#include <string.h>
#include <stdlib.h>
#include <malloc.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <errno.h>
/* Windows 8 wide-character string functions */
#if (_WIN32_WINNT >= 0x0602)
# include <stringapiset.h>
#endif
/* 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
# define FILE_ATTRIBUTE_DEVICE 0x40
#endif
/* File type and permission flags for stat() */
#if defined(_MSC_VER) && !defined(S_IREAD)
#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
#define S_IFBLK 0 /* Block device */
#define S_IFLNK 0 /* Link */
#define S_IFSOCK 0 /* Socket */
#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 */
@ -141,14 +168,22 @@
# define S_IXOTH 0 /* Execute others */
#endif
/* Indicates that d_type field is available in dirent structure */
#define _DIRENT_HAVE_D_TYPE
/* 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_IFFIFO
#define DT_FIFO S_IFIFO
#define DT_SOCK S_IFSOCK
#define DT_CHR S_IFCHR
#define DT_BLK S_IFBLK
@ -163,7 +198,7 @@
* only defined for compatibility. These macros should always return false
* on Windows.
*/
#define S_ISFIFO(mode) (((mode) & S_IFMT) == S_IFFIFO)
#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)
@ -171,29 +206,19 @@
#define S_ISCHR(mode) (((mode) & S_IFMT) == S_IFCHR)
#define S_ISBLK(mode) (((mode) & S_IFMT) == S_IFBLK)
/* For compatiblity with Unix */
#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
/* 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 + 1)
/* Set errno variable */
#if defined(_MSC_VER)
#define DIRENT_SET_ERRNO(x) _set_errno (x)
#else
#define DIRENT_SET_ERRNO(x) (errno = (x))
#endif
#ifdef __cplusplus
extern "C" {
#endif
/* Wide-character versions */
/* Wide-character version */
struct _wdirent {
long d_ino; /* Always zero */
unsigned short d_reclen; /* Structure size */
@ -205,7 +230,7 @@ typedef struct _wdirent _wdirent;
struct _WDIR {
struct _wdirent ent; /* Current directory entry */
WIN32_FIND_DATAW find_data; /* Private file data */
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 */
@ -217,6 +242,7 @@ 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
@ -248,6 +274,26 @@ 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
@ -258,7 +304,13 @@ _wopendir(
const wchar_t *dirname)
{
_WDIR *dirp = NULL;
int error = 0;
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));
@ -268,17 +320,18 @@ _wopendir(
/* 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 full path and search patterns */
/* 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 when the current
* allows rewinddir() to function correctly even when current
* working directory is changed between opendir() and rewinddir().
*/
n = GetFullPathNameW (dirname, n, dirp->patt, NULL);
@ -305,21 +358,18 @@ _wopendir(
*p = '\0';
/* Open directory stream and retrieve the first entry */
dirp->handle = FindFirstFileW (dirp->patt, &dirp->find_data);
if (dirp->handle != INVALID_HANDLE_VALUE) {
/* Directory entry is now waiting in memory */
dirp->cached = 1;
if (dirent_first (dirp)) {
/* Directory stream opened successfully */
error = 0;
} else {
/* Search pattern is not a directory name? */
DIRENT_SET_ERRNO (ENOENT);
/* Cannot retrieve first entry */
error = 1;
dirent_set_errno (ENOENT);
}
} else {
/* Cannot convert directory name to wide character string */
DIRENT_SET_ERRNO (ENOENT);
/* Cannot retrieve full path name */
dirent_set_errno (ENOENT);
error = 1;
}
@ -352,66 +402,55 @@ static struct _wdirent*
_wreaddir(
_WDIR *dirp)
{
DWORD attr;
errno_t error;
WIN32_FIND_DATAW *datap;
struct _wdirent *entp;
/* Get next directory entry */
if (dirp->cached != 0) {
/* A valid directory entry already in memory */
dirp->cached = 0;
} else {
/* Get the next directory entry from stream */
if (dirp->handle == INVALID_HANDLE_VALUE) {
return NULL;
/* 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 < PATH_MAX && datap->cFileName[n] != 0) {
entp->d_name[n] = datap->cFileName[n];
n++;
}
if (FindNextFileW (dirp->handle, &dirp->find_data) == FALSE) {
/* The very last entry has been processed or an error occured */
FindClose (dirp->handle);
dirp->handle = INVALID_HANDLE_VALUE;
return NULL;
}
}
dirp->ent.d_name[n] = 0;
/* Copy file name as a wide-character string */
error = wcsncpy_s(
dirp->ent.d_name, /* Destination string */
PATH_MAX, /* Size of dest in words */
dirp->find_data.cFileName, /* Source string */
PATH_MAX + 1); /* Max # of chars to copy */
if (!error) {
/* Length of file name excluding zero terminator */
entp->d_namlen = n;
/* Compute the length of name */
dirp->ent.d_namlen = wcsnlen (dirp->ent.d_name, PATH_MAX);
/* Determine file type */
attr = dirp->find_data.dwFileAttributes;
/* File type */
attr = datap->dwFileAttributes;
if ((attr & FILE_ATTRIBUTE_DEVICE) != 0) {
dirp->ent.d_type = DT_CHR;
entp->d_type = DT_CHR;
} else if ((attr & FILE_ATTRIBUTE_DIRECTORY) != 0) {
dirp->ent.d_type = DT_DIR;
entp->d_type = DT_DIR;
} else {
dirp->ent.d_type = DT_REG;
entp->d_type = DT_REG;
}
/* Reset dummy fields */
dirp->ent.d_ino = 0;
dirp->ent.d_reclen = sizeof (dirp->ent);
entp->d_ino = 0;
entp->d_reclen = sizeof (struct _wdirent);
} else {
/*
* Cannot copy file name from find_data to ent. Construct a
* dummy _wdirent structure to pass error to caller.
*/
dirp->ent.d_name[0] = '?';
dirp->ent.d_name[1] = '\0';
dirp->ent.d_namlen = 1;
dirp->ent.d_type = DT_UNKNOWN;
dirp->ent.d_ino = 0;
dirp->ent.d_reclen = 0;
/* Last directory entry read */
entp = NULL;
}
return &dirp->ent;
return entp;
}
/*
@ -444,7 +483,7 @@ _wclosedir(
} else {
/* Invalid directory stream */
DIRENT_SET_ERRNO (EBADF);
dirent_set_errno (EBADF);
ok = /*failure*/-1;
}
return ok;
@ -458,24 +497,79 @@ static void
_wrewinddir(
_WDIR* dirp)
{
if (dirp != NULL) {
/* release search handle */
if (dirp) {
/* Release existing search handle */
if (dirp->handle != INVALID_HANDLE_VALUE) {
FindClose (dirp->handle);
}
/* Open new search handle and retrieve the first directory entry */
dirp->handle = FindFirstFileW (dirp->patt, &dirp->find_data);
if (dirp->handle != INVALID_HANDLE_VALUE) {
/* a directory entry is now waiting in memory */
dirp->cached = 1;
} else {
/* Failed to re-open directory: no directory entry in memory */
dirp->cached = 0;
}
/* 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.
*/
@ -484,54 +578,30 @@ opendir(
const char *dirname)
{
struct DIR *dirp;
errno_t error = 0;
int error;
/* Must have directory name */
if (dirname == NULL) {
DIRENT_SET_ERRNO (ENOENT);
if (dirname == NULL || dirname[0] == '\0') {
dirent_set_errno (ENOENT);
return NULL;
}
/* Allocate memory for multi-byte string directory structures */
/* 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.
*
* Be ware of the return schemantics of MultiByteToWideChar() --
* the function basically returns the number of characters written to
* output buffer or zero if the conversion fails. However, the
* function does not necessarily zero-terminate the output
* buffer and may return 0xFFFD if the string contains invalid
* characters!
*/
n = MultiByteToWideChar(
CP_ACP, /* Input code page */
MB_PRECOMPOSED, /* Conversion flags */
dirname, /* Input string */
-1, /* Length of input string */
wname, /* Output buffer */
PATH_MAX); /* Size of output buffer */
if (n > 0 && n < PATH_MAX) {
/* Convert directory name to wide-character string */
error = dirent_mbstowcs_s(
&n, wname, PATH_MAX + 1, dirname, PATH_MAX);
if (!error) {
/* Zero-terminate output buffer */
wname[n] = '\0';
/* Open directory stream with wide-character string file name */
/* Open directory stream using wide-character name */
dirp->wdirp = _wopendir (wname);
if (dirp->wdirp) {
/* Initialize directory structure */
dirp->ent.d_name[0] = '\0';
dirp->ent.d_namlen = 0;
dirp->ent.d_type = 0;
dirp->ent.d_ino = 0;
dirp->ent.d_reclen = 0;
/* Directory stream opened */
error = 0;
} else {
/* Failed to open directory stream */
error = 1;
@ -564,91 +634,95 @@ opendir(
/*
* Read next directory entry.
*
* When working with console, please note that file names returned by
* readdir() are represented in the default ANSI code page while the
* console typically runs on another code page. Thus, non-ASCII characters
* will not usually display correctly. 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) always use _cprintf function when writing to
* console. The _cprinf() will re-encode ANSI strings to the console code
* page so non-ASCII characters will display correcly.
* 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)
{
struct dirent *p;
struct _wdirent *wp;
WIN32_FIND_DATAW *datap;
struct dirent *entp;
/* Read next directory entry using wide-character string functions */
wp = _wreaddir (dirp->wdirp);
if (wp) {
/* 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, MAX_PATH + 1, datap->cFileName, MAX_PATH);
/*
* Convert file name to multi-byte string.
* 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 of the return schemantics of WideCharToMultiByte() --
* the function basically returns the number of bytes
* written to output buffer or zero if the conversion fails.
* However, the function does not necessarily zero-terminate the
* buffer and it may even return 0xFFFD the string contains
* invalid characters!
* 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.
*/
n = WideCharToMultiByte(
CP_ACP, /* Output code page */
0, /* Conversion flags */
wp->d_name, /* Input string */
wp->d_namlen, /* Length of input string */
dirp->ent.d_name, /* Output buffer */
PATH_MAX, /* Size of output buffer */
NULL, /* Replacement character */
NULL); /* If chars were replaced */
if (n > 0 && n < PATH_MAX) {
if (error && datap->cAlternateFileName[0] != '\0') {
error = dirent_wcstombs_s(
&n, dirp->ent.d_name, MAX_PATH + 1, datap->cAlternateFileName,
sizeof (datap->cAlternateFileName) /
sizeof (datap->cAlternateFileName[0]));
}
/* Zero-terminate buffer */
dirp->ent.d_name[n] = '\0';
if (!error) {
DWORD attr;
/* Initialize directory entry for return */
p = &dirp->ent;
entp = &dirp->ent;
/* Compute length */
p->d_namlen = strnlen (dirp->ent.d_name, PATH_MAX);
/* Length of file name excluding zero terminator */
entp->d_namlen = n - 1;
/* Copy file attributes */
p->d_type = wp->d_type;
/* 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 */
p->d_ino = 0;
p->d_reclen = sizeof (dirp->ent);
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.
*/
p = &dirp->ent;
p->d_name[0] = '?';
p->d_name[1] = '\0';
p->d_namlen = 1;
p->d_type = DT_UNKNOWN;
p->d_ino = 0;
p->d_reclen = 0;
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 {
/* End of directory stream */
p = NULL;
/* No more directory entries */
entp = NULL;
}
return p;
return entp;
}
/*
@ -669,9 +743,11 @@ closedir(
free (dirp);
} else {
/* Invalid directory stream */
DIRENT_SET_ERRNO (EBADF);
dirent_set_errno (EBADF);
ok = /*failure*/-1;
}
return ok;
}
@ -687,6 +763,124 @@ rewinddir(
_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 */
n = mbstowcs (wcstr, mbstr, count);
if (n < sizeInWords) {
/* Zero-terminate output buffer */
if (wcstr) {
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,
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 */
n = wcstombs (mbstr, wcstr, count);
if (n < sizeInBytes) {
/* Zero-terminate output buffer */
if (mbstr) {
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)
/* Microsoft Visual Studio */
_set_errno (error);
#else
/* Non-Microsoft compiler */
errno = error;
#endif
}
#ifdef __cplusplus
}