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59 lines
1.9 KiB
C++
59 lines
1.9 KiB
C++
/*******************************************************************************
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Copyright(C) Jonas 'Sortie' Termansen 2011, 2014.
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This file is part of the Sortix C Library.
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The Sortix C Library is free software: you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation, either version 3 of the License, or (at your
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option) any later version.
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The Sortix C Library is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
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or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public
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License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with the Sortix C Library. If not, see <http://www.gnu.org/licenses/>.
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dirent/readdir.cpp
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Reads a directory entry from a directory stream into a DIR-specific buffer.
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*******************************************************************************/
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#include <dirent.h>
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#include <DIR.h>
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#include <errno.h>
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#include <stddef.h>
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#include <stdlib.h>
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extern "C" struct dirent* readdir(DIR* dir)
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{
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int old_errno = errno;
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if ( !dir->read_func )
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return dir->flags |= _DIR_ERROR, errno = EBADF, (struct dirent*) NULL;
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size_t size = dir->entrysize;
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int status;
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while ( 0 < (status = dir->read_func(dir->user, dir->entry, &size)) )
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{
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struct dirent* biggerdir = (struct dirent*) malloc(size);
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if ( !biggerdir )
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return dir->flags |= _DIR_ERROR, (struct dirent*) NULL;
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free(dir->entry);
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dir->entry = biggerdir;
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dir->entrysize = size;
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}
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if ( status < 0 )
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return dir->flags |= _DIR_ERROR, (struct dirent*) NULL;
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dir->flags &= ~_DIR_ERROR;
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if ( !dir->entry->d_name[0] )
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return dir->flags |= _DIR_EOF, errno = old_errno, (struct dirent*) NULL;
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return dir->entry;
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}
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