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apathy.hpp
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apathy.hpp
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// Apathy is a lightweight path/file/mstream/mmap IO library (C++03).
// - rlyeh, zlib/libpng licensed ~~ listening to Alice in chains / Nutshell.
// Features:
// [x] Append, overwrite, create, copy, move, delete, delete recursively, etc
// [x] Binary file patching (including locked binaries)
// [x] C++03
// [x] Compatible in-memory std::istreams/ostreams
// [x] Fast file/dir disk globbing
// [x] Functional API
// [x] Memory-map support
// [x] Semantic URI class
// [x] Tmpdir and tmpnames
// [x] Touch and date functions
// [x] Wildcards support
// [x] Tiny, portable, cross-platform and header-only.
// [x] ZLIB/LibPNG licensed
// Todo:
// [ ] `bool cpr( const pathfile &uri, const path &uri_dst );`
#pragma once
#define APATHY_VERSION "1.0.5" /* (2019/04/20): Fixed compilation on MacOS; replaced mktmp() with mkstmp(); suppressed C4996 warnings on Visual Studio; fixed API in docs
#define APATHY_VERSION "1.0.4" // (2016/04/11): Easier ls(), lsd(), lsf() API; allow premake4 style wildcards (ie, lsd("*t;**z") - glob all *t dirs, and *z dirs with subdirs )
#define APATHY_VERSION "1.0.3" // (2016/03/25): Fix MingW compilation issues
#define APATHY_VERSION "1.0.2" // (2016/02/02): Fix ext() with dotless files; Fix m/c/adate() on invalid pathfiles; Handle proper Win32 stat() case
#define APATHY_VERSION "1.0.1" // (2015/12/02): Add resize() function
#define APATHY_VERSION "1.0.0" // (2015/11/20): Simplified API, moved vfs/ostream to libraries apart
#define APATHY_VERSION "0.0.0" // (2013/04/16): Initial commit */
#ifndef APATHY_USE_MMAP
#define APATHY_USE_MMAP 1
#endif
#include <cassert> // assert
#include <cerrno> // errno, perror
#include <cstdio> // size_t
#include <cstdlib> // printf
#include <ctime> // std::time, std::difftime
#include <fcntl.h> // O_RDONLY, O_CREAT
#include <string.h> // memcpy, strerror
#include <sys/stat.h> // stat, lstat
#include <sys/types.h> // mode_t
#include <fstream>
#include <iostream>
#include <map>
#include <set>
#include <sstream>
#include <string>
#include <vector>
#ifdef _WIN32
# define $apathy32(...) __VA_ARGS__
# define $apathyXX(...)
#else
# define $apathy32(...)
# define $apathyXX(...) __VA_ARGS__
#endif
#ifdef _WIN32
#pragma warning(push)
#pragma warning(disable: 4996)
#endif
namespace apathy {
// General constants
enum { // own|grp|any
default_path_mode = 0755, // rwx|r-x|r-x
default_file_mode = 0644, // rwx|r--|r--
};
// These are memory stream classes.
// During their lifetime you can wrap std::istream or std::ostream classes over them.
// Usage:
// { imstream membuf(ptr, len); std::istream is(&membuf); /*...*/ }
// { omstream membuf(ptr, len); std::ostream os(&membuf); /*...*/ }
struct imstream : std::streambuf {
imstream( const char* base, std::ptrdiff_t n ) {
this->setg( (char *)base, (char *)base, (char *)base + n );
}
size_t position() const {
return this->pptr() - this->pbase();
}
};
struct omstream : std::streambuf {
omstream( char* base, std::ptrdiff_t n ) {
this->setp( base, base + n );
}
size_t position() const {
return this->pptr() - this->pbase();
}
};
// This uri class is used to disambiguate path/file cases, specially in API
// - file is an non-empty uri that does not end with '/'
// - path is an non-empty uri that ends with '/', or an empty one
// - pathfile is a concatenation of several paths and/or a single file
// - concatenation is done by using slash '/' operator: path1/path2/file
// Examples:
// uri | type | path | file
// -------|------|--------|-----
// "" | path | "" |
// "./" | path | "./" |
// "a" | file | | "a"
// "a/" | path | "a/" |
// "a/b" | file | "a/" | "b"
// "a/b/" | path | "a/b/" |
// Invalid configs will trigger an assert:
// - Providing windows \\ slashes in any file/path/pathfile class
// - Providing a /valid/path/ in a file class will trigger an assert()
// - Providing a /valid/file in a path class will trigger an assert()
template<int type>
struct uri : public std::string {
uri() : std::string()
{}
template<int type2>
uri( const uri<type2> &other ) : std::string(other)
{}
template<typename T>
uri( const T &t ) : std::string(t) {
fix();
}
template<size_t N>
uri( const char (&t)[N] ) : std::string(t, N) {
fix();
}
uri( const char *t ) : std::string(t ? t : "") {
fix();
}
uri<2> operator /( const std::string &other ) const {
return this->size() && *this->rbegin() != '/' ? (*this) + "/" + other : (*this) + other;
}
operator const char *() const {
return this->c_str();
}
void fix() {
// ensure no win32 slashes are present anymore
$apathy32( assert( this->find('\\') == std::string::npos ) );
// ensure hard constraints are met
if( type == 0 ) {
if( !this->empty() && '/' != *this->rbegin() ) {
this->append("/");
}
assert( is_path() );
}
if( type == 1 ) {
assert( is_file() );
}
}
bool is_path() const {
return type != 1 && (this->empty() || '/' == *this->rbegin());
}
bool is_file() const {
return type != 0 && (!this->empty() && '/' != *this->rbegin());
}
};
typedef uri<0> path ;
typedef uri<1> file ;
typedef uri<2> pathfile;
// From this point, any of following functions may fail due to permissions, non-existing path, etc
// Check apathy::why() to retrieve reason for last error.
// Read/write API
void *map( const file &uri, size_t size, size_t offset = 0 );
void unmap( void *ptr, size_t size );
bool read( const file &uri, std::string &buffer );
bool read( const file &uri, void *data, size_t &size );
bool append( const file &uri, const std::string &data );
bool append( const file &uri, const void *data, size_t size );
bool overwrite( const file &uri, const std::string &data );
bool overwrite( const file &uri, const void *data, size_t size );
bool resize( const file &uri, size_t new_size );
// Info API (RO)
bool exists( const pathfile &uri );
bool is_path( const pathfile &uri );
bool is_file( const pathfile &uri );
bool is_link( const pathfile &uri );
size_t size( const pathfile &uri ); // num bytes (file) or number of items(path)
bool is_empty( const pathfile &uri ); // true if null (file) or no items (path)
int gid( const pathfile &uri ); // group id
int uid( const pathfile &uri ); // user id
path stem( const pathfile &uri ); // d:/prj/test.png -> d:/prj/
file name( const pathfile &uri ); // d:/prj/test.png -> test.png
file base( const file &uri ); // d:/prj/test.png -> test
pathfile ext( const file &uri ); // d:/prj/test.png -> .png
// Info API (RW)
bool chown( const file &uri, int uid, int gid ); // change owner and group ids
bool chmod( const file &uri, int mode = default_file_mode ); // change file permissions
// Folder API
bool pushd();
bool popd();
path cwd();
bool cd( const path &uri );
bool rd( const path &uri );
bool md( const path &uri, size_t mode = default_path_mode );
// Disk operations API
// move, copy, copy (recursive), remove, remove (recursive)
bool mv( const pathfile &uri, const pathfile &uri_dst );
bool cp( const pathfile &uri, const pathfile &uri_dst );
bool rm( const pathfile &uri );
bool rmrf( const pathfile &uri );
// File patching API (will patch locked binaries too)
bool patch( const file &uri, const file &patchdata );
// Date & modif API
bool touch( const pathfile &uri, const time_t &date = std::time(0) );
bool touched( const pathfile &uri ); // check for external changes, first call returns false always
std::time_t adate( const pathfile &uri );
std::time_t cdate( const pathfile &uri );
std::time_t mdate( const pathfile &uri );
std::string stamp( const std::time_t &date, const char *format = "%Y-%m-%d %H:%M:%S" ); // defaults to MySQL date format
// Temp API
path tmpdir();
file tmpname();
// Native API
// - Puts normalized resource back to native format ('/'->'\\' on windows)
// - If spaces are found, add OS quotes as well ('\'', or '\"' on windows).
std::string native( const pathfile &uri );
// Globbing API
// - ls: file+dirs, lsf: files only, lsd: dirs only.
// - Support wildcards for 1-depth listing ("*.txt"), and recursive listing ("**.png")
// - Support wildcard chaining ("**.txt;**.mp?;*.png;*.ico;")
std::vector<std::string> ls( const std::string &masks = "*" );
std::vector<std::string> lsf( const std::string &masks = "*" );
std::vector<std::string> lsd( const std::string &masks = "*" );
// Handy aliases (for convenience)
std::string read( const file &uri );
// To deprecate:
bool ls0( std::vector<std::string> &list, const path &uri = "", const std::string &masks = "*" );
bool lsr0( std::vector<std::string> &list, const path &uri = "", const std::string &masks = "*" );
std::vector<std::string> ls0( const path &uri = "", const std::string &masks = "*" );
std::vector<std::string> lsr0( const path &uri = "", const std::string &masks = "*" );
// Error retrieval API
std::string why();
// Diverse utils
void sleep( double t );
bool match( const char *uri, const char *pattern );
size_t glob( std::vector<std::string> &out, const path &uri, const std::string &masks, bool recursive = false, bool skip_dotdirs = false );
size_t glob( std::vector<std::string> &out, const path &uri, const std::vector<std::string> &masks, bool recursive = false, bool skip_dotdirs = false );
size_t glob( std::map<std::string, bool> &out, const path &uri, const std::string &masks, bool recursive = false, bool skip_dotdirs = false );
size_t glob( std::map<std::string, bool> &out, const path &uri, const std::vector<std::string> &masks, bool recursive = false, bool skip_dotdirs = false );
std::string replace( const std::string &str, const std::string &from, const std::string &to );
std::string normalize( const std::string &str );
std::vector<std::string> split( const std::string &str, char sep );
std::vector<std::string> wildcards( const std::string &mask );
}
// select ms or posix/mingw route
#ifndef _WIN32
# if APATHY_USE_MMAP
# include <sys/mman.h>
# endif
# include <dirent.h>
# include <utime.h>
# include <unistd.h>
#else
# if APATHY_USE_MMAP
//#line 3 "mman.h"
/* References:
* CreateFileMapping: http://msdn.microsoft.com/en-us/library/aa366537(VS.85).aspx
* CloseHandle: http://msdn.microsoft.com/en-us/library/ms724211(VS.85).aspx
* MapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366761(VS.85).aspx
* UnmapViewOfFile: http://msdn.microsoft.com/en-us/library/aa366882(VS.85).aspx
*/
#pragma once
#if defined(__MINGW32__) || defined(_WIN32)
#include <io.h>
#include <windows.h>
#include <sys/types.h>
#define PROT_READ 0x1
#define PROT_WRITE 0x2
/* This flag is only available in WinXP+ */
#ifdef FILE_MAP_EXECUTE
#define PROT_EXEC 0x4
#else
#define PROT_EXEC 0x0
#define FILE_MAP_EXECUTE 0
#endif
#define MAP_SHARED 0x01
#define MAP_PRIVATE 0x02
#define MAP_ANONYMOUS 0x20
#define MAP_ANON MAP_ANONYMOUS
#define MAP_FAILED ((void *) -1)
#ifdef __USE_FILE_OFFSET64
# define DWORD_HI(x) (x >> 32)
# define DWORD_LO(x) ((x) & 0xffffffff)
#else
# define DWORD_HI(x) (0)
# define DWORD_LO(x) (x)
#endif
static
void* mmap(void* start, size_t length, int prot, int flags, int fd, off_t offset)
{
if (prot & ~(PROT_READ | PROT_WRITE | PROT_EXEC))
return MAP_FAILED;
if (fd == -1) {
if (!(flags & MAP_ANON) || offset)
return MAP_FAILED;
} else if (flags & MAP_ANON)
return MAP_FAILED;
DWORD flProtect;
if (prot & PROT_WRITE) {
if (prot & PROT_EXEC)
flProtect = PAGE_EXECUTE_READWRITE;
else
flProtect = PAGE_READWRITE;
} else if (prot & PROT_EXEC) {
if (prot & PROT_READ)
flProtect = PAGE_EXECUTE_READ;
else if (prot & PROT_EXEC)
flProtect = PAGE_EXECUTE;
} else
flProtect = PAGE_READONLY;
off_t end = length + offset;
HANDLE mmap_fd, h;
if (fd == -1)
mmap_fd = INVALID_HANDLE_VALUE;
else
mmap_fd = (HANDLE)_get_osfhandle(fd);
h = CreateFileMapping(mmap_fd, NULL, flProtect, DWORD_HI(end), DWORD_LO(end), NULL);
if (h == NULL)
return MAP_FAILED;
DWORD dwDesiredAccess;
if (prot & PROT_WRITE)
dwDesiredAccess = FILE_MAP_WRITE;
else
dwDesiredAccess = FILE_MAP_READ;
if (prot & PROT_EXEC)
dwDesiredAccess |= FILE_MAP_EXECUTE;
if (flags & MAP_PRIVATE)
dwDesiredAccess |= FILE_MAP_COPY;
void *ret = MapViewOfFile(h, dwDesiredAccess, DWORD_HI(offset), DWORD_LO(offset), length);
if (ret == NULL) {
ret = MAP_FAILED;
}
// since we are handling the file ourselves with fd, close the Windows Handle here
CloseHandle(h);
return ret;
}
static
void munmap(void* addr, size_t length)
{
UnmapViewOfFile(addr);
}
#undef DWORD_HI
#undef DWORD_LO
#endif
# endif
//#line 3 "dirent.h"
#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(), 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 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 {
/* Always zero */
long d_ino;
/* 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];
};
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;
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 {
/* Always zero */
long d_ino;
/* 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];
};
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(