Added the dirent.h file used for opening and reading Directory holding image files. Used in image_to_j2k.c and j2k_to_image.c.
This commit is contained in:
Parvatha Elangovan
parent
0781b7d441
commit
313c772f4a
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@ -108,11 +108,12 @@ int getopt(int nargc, char *const *nargv, const char *ostr) {
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return (-1);
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if (!*place)
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++optind;
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if (opterr && *ostr != ':')
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(void) fprintf(stderr,
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if (opterr && *ostr != ':') {
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fprintf(stderr,
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"%s: illegal option -- %c\n", __progname, optopt);
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return (BADCH);
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}
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}
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if (*++oli != ':') { /* don't need argument */
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optarg = NULL;
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if (!*place)
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@ -124,11 +125,12 @@ int getopt(int nargc, char *const *nargv, const char *ostr) {
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place = EMSG;
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if (*ostr == ':')
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return (BADARG);
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if (opterr)
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(void) fprintf(stderr,
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if (opterr) {
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fprintf(stderr,
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"%s: option requires an argument -- %c\n",
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__progname, optopt);
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return (BADCH);
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}
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} else /* white space */
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optarg = nargv[optind];
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place = EMSG;
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@ -171,17 +173,19 @@ again:
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if(optarg){
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if (strchr(optarg,'-')){ /* No argument */
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if (*optstring==':') return ':';
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if (opterr)
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(void) fprintf(stderr,"%s: option requires an argument %c\n",arg, optopt);
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if (opterr) {
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fprintf(stderr,"%s: option requires an argument %c\n",arg, optopt);
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return (BADCH);
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}
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++optind;
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}
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}
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if (!optarg && o->has_arg==1) { /* no argument there */
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if (*optstring==':') return ':';
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if (opterr)
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(void) fprintf(stderr,"%s: option requires an argument %c\n",arg, optopt);
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if (opterr) {
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fprintf(stderr,"%s: option requires an argument %c\n",arg, optopt);
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return (BADCH);
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}
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++optind;
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}
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++optind;
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@ -242,4 +246,5 @@ found:
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++optind;
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return '?';
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}// end of long option
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return (BADCH);
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}
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@ -0,0 +1,677 @@
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/*
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* uce-dirent.h - operating system independent dirent implementation
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*
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* Copyright (C) 1998-2002 Toni Ronkko
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*
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* Permission is hereby granted, free of charge, to any person obtaining
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* a copy of this software and associated documentation files (the
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* ``Software''), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sublicense, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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* IN NO EVENT SHALL TONI RONKKO BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*
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*
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* May 28 1998, Toni Ronkko <tronkko@messi.uku.fi>
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*
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* $Id: uce-dirent.h,v 1.7 2002/05/13 10:48:35 tr Exp $
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*
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* $Log: uce-dirent.h,v $
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* Revision 1.7 2002/05/13 10:48:35 tr
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* embedded some source code directly to the header so that no source
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* modules need to be included in the MS Visual C project using the
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* interface, removed all the dependencies to other headers of the `uce'
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* library so that the header can be made public
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*
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* Revision 1.6 2002/04/12 16:22:04 tr
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* Unified Compiling Environment (UCE) replaced `std' library
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*
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* Revision 1.5 2001/07/20 16:33:40 tr
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* moved to `std' library and re-named defines accordingly
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*
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* Revision 1.4 2001/07/10 16:47:18 tronkko
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* revised comments
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*
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* Revision 1.3 2001/01/11 13:16:43 tr
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* using ``uce-machine.h'' for finding out defines such as `FREEBSD'
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*
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* Revision 1.2 2000/10/08 16:00:41 tr
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* copy of FreeBSD man page
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*
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* Revision 1.1 2000/07/10 05:53:16 tr
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* Initial revision
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*
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* Revision 1.2 1998/07/19 18:29:14 tr
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* Added error reporting capabilities and some asserts.
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*
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* Revision 1.1 1998/07/04 16:27:51 tr
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* Initial revision
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*
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*
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* MSVC 1.0 scans automatic dependencies incorrectly when your project
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* contains this very header. The problem is that MSVC cannot handle
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* include directives inside #if..#endif block those are never entered.
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* Since this header ought to compile in many different operating systems,
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* there had to be several conditional blocks that are compiled only in
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* operating systems for what they were designed for. MSVC 1.0 cannot
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* handle inclusion of sys/dir.h in a part that is compiled only in Apollo
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* operating system. To fix the problem you need to insert DIR.H into
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* SYSINCL.DAT located in MSVC\BIN directory and restart visual C++.
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* Consult manuals for more informaton about the problem.
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*
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* Since many UNIX systems have dirent.h we assume to have one also.
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* However, if your UNIX system does not have dirent.h you can download one
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* for example at: http://ftp.uni-mannheim.de/ftp/GNU/dirent/dirent.tar.gz.
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* You can also see if you have one of dirent.h, direct.h, dir.h, ndir.h,
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* sys/dir.h and sys/ndir.h somewhere. Try defining HAVE_DIRENT_H,
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* HAVE_DIRECT_H, HAVE_DIR_H, HAVE_NDIR_H, HAVE_SYS_DIR_H and
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* HAVE_SYS_NDIR_H according to the files found.
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*/
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#ifndef DIRENT_H
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#define DIRENT_H
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#define DIRENT_H_INCLUDED
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/* find out platform */
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#if defined(MSDOS) /* MS-DOS */
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#elif defined(__MSDOS__) /* Turbo C/Borland */
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# define MSDOS
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#elif defined(__DOS__) /* Watcom */
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# define MSDOS
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#endif
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#if defined(WIN32) /* MS-Windows */
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#elif defined(__NT__) /* Watcom */
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# define WIN32
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#elif defined(_WIN32) /* Microsoft */
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# define WIN32
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#elif defined(__WIN32__) /* Borland */
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# define WIN32
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#endif
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/*
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* See what kind of dirent interface we have unless autoconf has already
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* determinated that.
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*/
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#if !defined(HAVE_DIRENT_H) && !defined(HAVE_DIRECT_H) && !defined(HAVE_SYS_DIR_H) && !defined(HAVE_NDIR_H) && !defined(HAVE_SYS_NDIR_H) && !defined(HAVE_DIR_H)
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# if defined(_MSC_VER) /* Microsoft C/C++ */
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/* no dirent.h */
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# elif defined(__BORLANDC__) /* Borland C/C++ */
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# define HAVE_DIRENT_H
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# define VOID_CLOSEDIR
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# elif defined(__TURBOC__) /* Borland Turbo C */
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/* no dirent.h */
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# elif defined(__WATCOMC__) /* Watcom C/C++ */
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# define HAVE_DIRECT_H
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# elif defined(__apollo) /* Apollo */
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# define HAVE_SYS_DIR_H
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# elif defined(__hpux) /* HP-UX */
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# define HAVE_DIRENT_H
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# elif defined(__alpha) || defined(__alpha__) /* Alpha OSF1 */
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# error "not implemented"
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# elif defined(__sgi) /* Silicon Graphics */
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# define HAVE_DIRENT_H
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# elif defined(sun) || defined(_sun) /* Sun Solaris */
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# define HAVE_DIRENT_H
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# elif defined(__FreeBSD__) /* FreeBSD */
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# define HAVE_DIRENT_H
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# elif defined(__linux__) /* Linux */
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# define HAVE_DIRENT_H
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# elif defined(__GNUC__) /* GNU C/C++ */
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# define HAVE_DIRENT_H
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# else
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# error "not implemented"
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# endif
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#endif
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/* include proper interface headers */
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#if defined(HAVE_DIRENT_H)
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# include <dirent.h>
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# ifdef FREEBSD
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# define NAMLEN(dp) ((int)((dp)->d_namlen))
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# else
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# define NAMLEN(dp) ((int)(strlen((dp)->d_name)))
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# endif
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#elif defined(HAVE_NDIR_H)
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# include <ndir.h>
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# define NAMLEN(dp) ((int)((dp)->d_namlen))
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#elif defined(HAVE_SYS_NDIR_H)
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# include <sys/ndir.h>
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# define NAMLEN(dp) ((int)((dp)->d_namlen))
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#elif defined(HAVE_DIRECT_H)
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# include <direct.h>
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# define NAMLEN(dp) ((int)((dp)->d_namlen))
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#elif defined(HAVE_DIR_H)
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# include <dir.h>
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# define NAMLEN(dp) ((int)((dp)->d_namlen))
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#elif defined(HAVE_SYS_DIR_H)
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# include <sys/types.h>
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# include <sys/dir.h>
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# ifndef dirent
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# define dirent direct
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# endif
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# define NAMLEN(dp) ((int)((dp)->d_namlen))
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#elif defined(MSDOS) || defined(WIN32)
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/* figure out type of underlaying directory interface to be used */
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# if defined(WIN32)
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# define DIRENT_WIN32_INTERFACE
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# elif defined(MSDOS)
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# define DIRENT_MSDOS_INTERFACE
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# else
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# error "missing native dirent interface"
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# endif
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/*** WIN32 specifics ***/
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# if defined(DIRENT_WIN32_INTERFACE)
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# include <windows.h>
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# if !defined(DIRENT_MAXNAMLEN)
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# define DIRENT_MAXNAMLEN (MAX_PATH)
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# endif
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/*** MS-DOS specifics ***/
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# elif defined(DIRENT_MSDOS_INTERFACE)
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# include <dos.h>
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/* Borland defines file length macros in dir.h */
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# if defined(__BORLANDC__)
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# include <dir.h>
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# if !defined(DIRENT_MAXNAMLEN)
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# define DIRENT_MAXNAMLEN ((MAXFILE)+(MAXEXT))
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# endif
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# if !defined(_find_t)
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# define _find_t find_t
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# endif
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/* Turbo C defines ffblk structure in dir.h */
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# elif defined(__TURBOC__)
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# include <dir.h>
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# if !defined(DIRENT_MAXNAMLEN)
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# define DIRENT_MAXNAMLEN ((MAXFILE)+(MAXEXT))
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# endif
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# define DIRENT_USE_FFBLK
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/* MSVC */
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# elif defined(_MSC_VER)
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# if !defined(DIRENT_MAXNAMLEN)
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# define DIRENT_MAXNAMLEN (12)
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# endif
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/* Watcom */
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# elif defined(__WATCOMC__)
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# if !defined(DIRENT_MAXNAMLEN)
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# if defined(__OS2__) || defined(__NT__)
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# define DIRENT_MAXNAMLEN (255)
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# else
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# define DIRENT_MAXNAMLEN (12)
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# endif
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# endif
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# endif
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# endif
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/*** generic MS-DOS and MS-Windows stuff ***/
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# if !defined(NAME_MAX) && defined(DIRENT_MAXNAMLEN)
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# define NAME_MAX DIRENT_MAXNAMLEN
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# endif
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# if NAME_MAX < DIRENT_MAXNAMLEN
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# error "assertion failed: NAME_MAX >= DIRENT_MAXNAMLEN"
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# endif
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/*
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* Substitute for real dirent structure. Note that `d_name' field is a
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* true character array although we have it copied in the implementation
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* dependent data. We could save some memory if we had declared `d_name'
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* as a pointer refering the name within implementation dependent data.
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* We have not done that since some code may rely on sizeof(d_name) to be
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* something other than four. Besides, directory entries are typically so
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* small that it takes virtually no time to copy them from place to place.
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*/
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typedef struct dirent {
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char d_name[NAME_MAX + 1];
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/*** Operating system specific part ***/
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# if defined(DIRENT_WIN32_INTERFACE) /*WIN32*/
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WIN32_FIND_DATA data;
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# elif defined(DIRENT_MSDOS_INTERFACE) /*MSDOS*/
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# if defined(DIRENT_USE_FFBLK)
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struct ffblk data;
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# else
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struct _find_t data;
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# endif
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# endif
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} dirent;
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/* DIR substitute structure containing directory name. The name is
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* essential for the operation of ``rewinndir'' function. */
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typedef struct DIR {
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char *dirname; /* directory being scanned */
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dirent current; /* current entry */
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int dirent_filled; /* is current un-processed? */
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/*** Operating system specific part ***/
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# if defined(DIRENT_WIN32_INTERFACE)
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HANDLE search_handle;
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# elif defined(DIRENT_MSDOS_INTERFACE)
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# endif
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} DIR;
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# ifdef __cplusplus
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extern "C" {
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# endif
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/* supply prototypes for dirent functions */
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static DIR *opendir (const char *dirname);
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static struct dirent *readdir (DIR *dirp);
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static int closedir (DIR *dirp);
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static void rewinddir (DIR *dirp);
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/*
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* Implement dirent interface as static functions so that the user does not
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* need to change his project in any way to use dirent function. With this
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* it is sufficient to include this very header from source modules using
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* dirent functions and the functions will be pulled in automatically.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <assert.h>
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#include <errno.h>
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/* use ffblk instead of _find_t if requested */
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#if defined(DIRENT_USE_FFBLK)
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# define _A_ARCH (FA_ARCH)
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# define _A_HIDDEN (FA_HIDDEN)
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# define _A_NORMAL (0)
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# define _A_RDONLY (FA_RDONLY)
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# define _A_SUBDIR (FA_DIREC)
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# define _A_SYSTEM (FA_SYSTEM)
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# define _A_VOLID (FA_LABEL)
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# define _dos_findnext(dest) findnext(dest)
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# define _dos_findfirst(name,flags,dest) findfirst(name,dest,flags)
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#endif
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static int _initdir (DIR *p);
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static const char *_getdirname (const struct dirent *dp);
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static void _setdirname (struct DIR *dirp);
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/*
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* <function name="opendir">
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* <intro>open directory stream for reading
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* <syntax>DIR *opendir (const char *dirname);
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*
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* <desc>Open named directory stream for read and return pointer to the
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* internal working area that is used for retrieving individual directory
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* entries. The internal working area has no fields of your interest.
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*
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* <ret>Returns a pointer to the internal working area or NULL in case the
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* directory stream could not be opened. Global `errno' variable will set
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* in case of error as follows:
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*
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* <table>
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* [EACESS |Permission denied.
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* [EMFILE |Too many open files used by the process.
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* [ENFILE |Too many open files in system.
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* [ENOENT |Directory does not exist.
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* [ENOMEM |Insufficient memory.
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* [ENOTDIR |dirname does not refer to directory. This value is not
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* reliable on MS-DOS and MS-Windows platforms. Many
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* implementations return ENOENT even when the name refers to a
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* file.]
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* </table>
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* </function>
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*/
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static DIR *opendir(const char *dirname)
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{
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DIR *dirp;
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assert (dirname != NULL);
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dirp = (DIR*)malloc (sizeof (struct DIR));
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if (dirp != NULL) {
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char *p;
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/* allocate room for directory name */
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dirp->dirname = (char*) malloc (strlen (dirname) + 1 + strlen ("\\*.*"));
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if (dirp->dirname == NULL) {
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/* failed to duplicate directory name. errno set by malloc() */
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free (dirp);
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return NULL;
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}
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/* Copy directory name while appending directory separator and "*.*".
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* Directory separator is not appended if the name already ends with
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* drive or directory separator. Directory separator is assumed to be
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* '/' or '\' and drive separator is assumed to be ':'. */
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strcpy (dirp->dirname, dirname);
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p = strchr (dirp->dirname, '\0');
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if (dirp->dirname < p &&
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*(p - 1) != '\\' && *(p - 1) != '/' && *(p - 1) != ':')
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{
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strcpy (p++, "\\");
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}
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# ifdef DIRENT_WIN32_INTERFACE
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strcpy (p, "*"); /*scan files with and without extension in win32*/
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# else
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strcpy (p, "*.*"); /*scan files with and without extension in DOS*/
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# endif
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/* open stream */
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if (_initdir (dirp) == 0) {
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/* initialization failed */
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free (dirp->dirname);
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free (dirp);
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return NULL;
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}
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}
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return dirp;
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}
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/*
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* <function name="readdir">
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* <intro>read a directory entry
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* <syntax>struct dirent *readdir (DIR *dirp);
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*
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* <desc>Read individual directory entry and return pointer to a structure
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* containing the name of the entry. Individual directory entries returned
|
||||
* include normal files, sub-directories, pseudo-directories "." and ".."
|
||||
* and also volume labels, hidden files and system files in MS-DOS and
|
||||
* MS-Windows. You might want to use stat(2) function to determinate which
|
||||
* one are you dealing with. Many dirent implementations already contain
|
||||
* equivalent information in dirent structure but you cannot depend on
|
||||
* this.
|
||||
*
|
||||
* The dirent structure contains several system dependent fields that
|
||||
* generally have no interest to you. The only interesting one is char
|
||||
* d_name[] that is also portable across different systems. The d_name
|
||||
* field contains the name of the directory entry without leading path.
|
||||
* While d_name is portable across different systems the actual storage
|
||||
* capacity of d_name varies from system to system and there is no portable
|
||||
* way to find out it at compile time as different systems define the
|
||||
* capacity of d_name with different macros and some systems do not define
|
||||
* capacity at all (besides actual declaration of the field). If you really
|
||||
* need to find out storage capacity of d_name then you might want to try
|
||||
* NAME_MAX macro. The NAME_MAX is defined in POSIX standard althought
|
||||
* there are many MS-DOS and MS-Windows implementations those do not define
|
||||
* it. There are also systems that declare d_name as "char d_name[1]" and
|
||||
* then allocate suitable amount of memory at run-time. Thanks to Alain
|
||||
* Decamps (Alain.Decamps@advalvas.be) for pointing it out to me.
|
||||
*
|
||||
* This all leads to the fact that it is difficult to allocate space
|
||||
* for the directory names when the very same program is being compiled on
|
||||
* number of operating systems. Therefore I suggest that you always
|
||||
* allocate space for directory names dynamically.
|
||||
*
|
||||
* <ret>
|
||||
* Returns a pointer to a structure containing name of the directory entry
|
||||
* in `d_name' field or NULL if there was an error. In case of an error the
|
||||
* global `errno' variable will set as follows:
|
||||
*
|
||||
* <table>
|
||||
* [EBADF |dir parameter refers to an invalid directory stream. This value
|
||||
* is not set reliably on all implementations.]
|
||||
* </table>
|
||||
* </function>
|
||||
*/
|
||||
static struct dirent *
|
||||
readdir (DIR *dirp)
|
||||
{
|
||||
assert(dirp != NULL);
|
||||
if (dirp == NULL) {
|
||||
errno = EBADF;
|
||||
return NULL;
|
||||
}
|
||||
|
||||
#if defined(DIRENT_WIN32_INTERFACE)
|
||||
if (dirp->search_handle == INVALID_HANDLE_VALUE) {
|
||||
/* directory stream was opened/rewound incorrectly or it ended normally */
|
||||
errno = EBADF;
|
||||
return NULL;
|
||||
}
|
||||
#endif
|
||||
|
||||
if (dirp->dirent_filled != 0) {
|
||||
/*
|
||||
* Directory entry has already been retrieved and there is no need to
|
||||
* retrieve a new one. Directory entry will be retrieved in advance
|
||||
* when the user calls readdir function for the first time. This is so
|
||||
* because real dirent has separate functions for opening and reading
|
||||
* the stream whereas Win32 and DOS dirents open the stream
|
||||
* automatically when we retrieve the first file. Therefore, we have to
|
||||
* save the first file when opening the stream and later we have to
|
||||
* return the saved entry when the user tries to read the first entry.
|
||||
*/
|
||||
dirp->dirent_filled = 0;
|
||||
} else {
|
||||
/* fill in entry and return that */
|
||||
#if defined(DIRENT_WIN32_INTERFACE)
|
||||
if (FindNextFile (dirp->search_handle, &dirp->current.data) == FALSE) {
|
||||
/* Last file has been processed or an error occured */
|
||||
FindClose (dirp->search_handle);
|
||||
dirp->search_handle = INVALID_HANDLE_VALUE;
|
||||
errno = ENOENT;
|
||||
return NULL;
|
||||
}
|
||||
|
||||
# elif defined(DIRENT_MSDOS_INTERFACE)
|
||||
if (_dos_findnext (&dirp->current.data) != 0) {
|
||||
/* _dos_findnext and findnext will set errno to ENOENT when no
|
||||
* more entries could be retrieved. */
|
||||
return NULL;
|
||||
}
|
||||
# endif
|
||||
|
||||
_setdirname (dirp);
|
||||
assert (dirp->dirent_filled == 0);
|
||||
}
|
||||
return &dirp->current;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* <function name="closedir">
|
||||
* <intro>close directory stream.
|
||||
* <syntax>int closedir (DIR *dirp);
|
||||
*
|
||||
* <desc>Close directory stream opened by the `opendir' function. Close of
|
||||
* directory stream invalidates the DIR structure as well as previously read
|
||||
* dirent entry.
|
||||
*
|
||||
* <ret>The function typically returns 0 on success and -1 on failure but
|
||||
* the function may be declared to return void on same systems. At least
|
||||
* Borland C/C++ and some UNIX implementations use void as a return type.
|
||||
* The dirent wrapper tries to define VOID_CLOSEDIR whenever closedir is
|
||||
* known to return nothing. The very same definition is made by the GNU
|
||||
* autoconf if you happen to use it.
|
||||
*
|
||||
* The global `errno' variable will set to EBADF in case of error.
|
||||
* </function>
|
||||
*/
|
||||
static int
|
||||
closedir (DIR *dirp)
|
||||
{
|
||||
int retcode = 0;
|
||||
|
||||
/* make sure that dirp points to legal structure */
|
||||
assert (dirp != NULL);
|
||||
if (dirp == NULL) {
|
||||
errno = EBADF;
|
||||
return -1;
|
||||
}
|
||||
|
||||
/* free directory name and search handles */
|
||||
if (dirp->dirname != NULL) free (dirp->dirname);
|
||||
|
||||
#if defined(DIRENT_WIN32_INTERFACE)
|
||||
if (dirp->search_handle != INVALID_HANDLE_VALUE) {
|
||||
if (FindClose (dirp->search_handle) == FALSE) {
|
||||
/* Unknown error */
|
||||
retcode = -1;
|
||||
errno = EBADF;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
/* clear dirp structure to make sure that it cannot be used anymore*/
|
||||
memset (dirp, 0, sizeof (*dirp));
|
||||
# if defined(DIRENT_WIN32_INTERFACE)
|
||||
dirp->search_handle = INVALID_HANDLE_VALUE;
|
||||
# endif
|
||||
|
||||
free (dirp);
|
||||
return retcode;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* <function name="rewinddir">
|
||||
* <intro>rewind directory stream to the beginning
|
||||
* <syntax>void rewinddir (DIR *dirp);
|
||||
*
|
||||
* <desc>Rewind directory stream to the beginning so that the next call of
|
||||
* readdir() returns the very first directory entry again. However, note
|
||||
* that next call of readdir() may not return the same directory entry as it
|
||||
* did in first time. The directory stream may have been affected by newly
|
||||
* created files.
|
||||
*
|
||||
* Almost every dirent implementation ensure that rewinddir will update
|
||||
* the directory stream to reflect any changes made to the directory entries
|
||||
* since the previous ``opendir'' or ``rewinddir'' call. Keep an eye on
|
||||
* this if your program depends on the feature. I know at least one dirent
|
||||
* implementation where you are required to close and re-open the stream to
|
||||
* see the changes.
|
||||
*
|
||||
* <ret>Returns nothing. If something went wrong while rewinding, you will
|
||||
* notice it later when you try to retrieve the first directory entry.
|
||||
*/
|
||||
static void
|
||||
rewinddir (DIR *dirp)
|
||||
{
|
||||
/* make sure that dirp is legal */
|
||||
assert (dirp != NULL);
|
||||
if (dirp == NULL) {
|
||||
errno = EBADF;
|
||||
return;
|
||||
}
|
||||
assert (dirp->dirname != NULL);
|
||||
|
||||
/* close previous stream */
|
||||
#if defined(DIRENT_WIN32_INTERFACE)
|
||||
if (dirp->search_handle != INVALID_HANDLE_VALUE) {
|
||||
if (FindClose (dirp->search_handle) == FALSE) {
|
||||
/* Unknown error */
|
||||
errno = EBADF;
|
||||
}
|
||||
}
|
||||
#endif
|
||||
|
||||
/* re-open previous stream */
|
||||
if (_initdir (dirp) == 0) {
|
||||
/* initialization failed but we cannot deal with error. User will notice
|
||||
* error later when she tries to retrieve first directory enty. */
|
||||
/*EMPTY*/;
|
||||
}
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Open native directory stream object and retrieve first file.
|
||||
* Be sure to close previous stream before opening new one.
|
||||
*/
|
||||
static int
|
||||
_initdir (DIR *dirp)
|
||||
{
|
||||
assert (dirp != NULL);
|
||||
assert (dirp->dirname != NULL);
|
||||
dirp->dirent_filled = 0;
|
||||
|
||||
# if defined(DIRENT_WIN32_INTERFACE)
|
||||
/* Open stream and retrieve first file */
|
||||
dirp->search_handle = FindFirstFile (dirp->dirname, &dirp->current.data);
|
||||
if (dirp->search_handle == INVALID_HANDLE_VALUE) {
|
||||
/* something went wrong but we don't know what. GetLastError() could
|
||||
* give us more information about the error, but then we should map
|
||||
* the error code into errno. */
|
||||
errno = ENOENT;
|
||||
return 0;
|
||||
}
|
||||
|
||||
# elif defined(DIRENT_MSDOS_INTERFACE)
|
||||
if (_dos_findfirst (dirp->dirname,
|
||||
_A_SUBDIR | _A_RDONLY | _A_ARCH | _A_SYSTEM | _A_HIDDEN,
|
||||
&dirp->current.data) != 0)
|
||||
{
|
||||
/* _dos_findfirst and findfirst will set errno to ENOENT when no
|
||||
* more entries could be retrieved. */
|
||||
return 0;
|
||||
}
|
||||
# endif
|
||||
|
||||
/* initialize DIR and it's first entry */
|
||||
_setdirname (dirp);
|
||||
dirp->dirent_filled = 1;
|
||||
return 1;
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Return implementation dependent name of the current directory entry.
|
||||
*/
|
||||
static const char *
|
||||
_getdirname (const struct dirent *dp)
|
||||
{
|
||||
#if defined(DIRENT_WIN32_INTERFACE)
|
||||
return dp->data.cFileName;
|
||||
|
||||
#elif defined(DIRENT_USE_FFBLK)
|
||||
return dp->data.ff_name;
|
||||
|
||||
#else
|
||||
return dp->data.name;
|
||||
#endif
|
||||
}
|
||||
|
||||
|
||||
/*
|
||||
* Copy name of implementation dependent directory entry to the d_name field.
|
||||
*/
|
||||
static void
|
||||
_setdirname (struct DIR *dirp) {
|
||||
/* make sure that d_name is long enough */
|
||||
assert (strlen (_getdirname (&dirp->current)) <= NAME_MAX);
|
||||
|
||||
strncpy (dirp->current.d_name,
|
||||
_getdirname (&dirp->current),
|
||||
NAME_MAX);
|
||||
dirp->current.d_name[NAME_MAX] = '\0'; /*char d_name[NAME_MAX+1]*/
|
||||
}
|
||||
|
||||
# ifdef __cplusplus
|
||||
}
|
||||
# endif
|
||||
# define NAMLEN(dp) ((int)(strlen((dp)->d_name)))
|
||||
|
||||
#else
|
||||
# error "missing dirent interface"
|
||||
#endif
|
||||
|
||||
|
||||
#endif /*DIRENT_H*/
|
||||
Loading…
Reference in New Issue