sl@0: /* $LP: LPlib/source/LPdir_unix.c,v 1.11 2004/09/23 22:07:22 _cvs_levitte Exp $ */
sl@0: /*
sl@0:  * Copyright (c) 2004, Richard Levitte <richard@levitte.org>
sl@0:  * All rights reserved.
sl@0:  *
sl@0:  * Redistribution and use in source and binary forms, with or without
sl@0:  * modification, are permitted provided that the following conditions
sl@0:  * are met:
sl@0:  * 1. Redistributions of source code must retain the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer.
sl@0:  * 2. Redistributions in binary form must reproduce the above copyright
sl@0:  *    notice, this list of conditions and the following disclaimer in the
sl@0:  *    documentation and/or other materials provided with the distribution.
sl@0:  * 
sl@0:  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
sl@0:  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
sl@0:  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
sl@0:  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
sl@0:  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
sl@0:  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
sl@0:  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
sl@0:  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
sl@0:  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
sl@0:  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
sl@0:  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
sl@0:  */
sl@0:  /*
sl@0:  © Portions copyright (c) 2006 Nokia Corporation.  All rights reserved.
sl@0:  */
sl@0: 
sl@0: 
sl@0: #include <stddef.h>
sl@0: #include <stdlib.h>
sl@0: #include <limits.h>
sl@0: #include <string.h>
sl@0: #include <sys/types.h>
sl@0: #include <dirent.h>
sl@0: #include <errno.h>
sl@0: 
sl@0: #if !defined(SYMBIAN)
sl@0: #ifndef LPDIR_H
sl@0: #include "LPdir.h"
sl@0: #endif
sl@0: #endif
sl@0: 
sl@0: /* The POSIXly macro for the maximum number of characters in a file path
sl@0:    is NAME_MAX.  However, some operating systems use PATH_MAX instead.
sl@0:    Therefore, it seems natural to first check for PATH_MAX and use that,
sl@0:    and if it doesn't exist, use NAME_MAX. */
sl@0: #if defined(PATH_MAX)
sl@0: # define LP_ENTRY_SIZE PATH_MAX
sl@0: #elif defined(NAME_MAX)
sl@0: # define LP_ENTRY_SIZE NAME_MAX
sl@0: #endif
sl@0: 
sl@0: /* Of course, there's the possibility that neither PATH_MAX nor NAME_MAX
sl@0:    exist.  It's also possible that NAME_MAX exists but is define to a
sl@0:    very small value (HP-UX offers 14), so we need to check if we got a
sl@0:    result, and if it meets a minimum standard, and create or change it
sl@0:    if not. */
sl@0: #if !defined(LP_ENTRY_SIZE) || LP_ENTRY_SIZE<255
sl@0: # undef LP_ENTRY_SIZE
sl@0: # define LP_ENTRY_SIZE 255
sl@0: #endif
sl@0: 
sl@0: struct LP_dir_context_st
sl@0: {
sl@0:   DIR *dir;
sl@0:   char entry_name[LP_ENTRY_SIZE+1];
sl@0: };
sl@0: 
sl@0: EXPORT_C const char *LP_find_file(LP_DIR_CTX **ctx, const char *directory)
sl@0: {
sl@0:   struct dirent *direntry = NULL;
sl@0: 
sl@0:   if (ctx == NULL || directory == NULL)
sl@0:     {
sl@0:       errno = EINVAL;
sl@0:       return 0;
sl@0:     }
sl@0: 
sl@0:   errno = 0;
sl@0:   if (*ctx == NULL)
sl@0:     {
sl@0:       *ctx = (LP_DIR_CTX *)malloc(sizeof(LP_DIR_CTX));
sl@0:       if (*ctx == NULL)
sl@0: 	{
sl@0: 	  errno = ENOMEM;
sl@0: 	  return 0;
sl@0: 	}
sl@0:       memset(*ctx, '\0', sizeof(LP_DIR_CTX));
sl@0: 
sl@0:       (*ctx)->dir = opendir(directory);
sl@0:       if ((*ctx)->dir == NULL)
sl@0: 	{
sl@0: 	  int save_errno = errno; /* Probably not needed, but I'm paranoid */
sl@0: 	  free(*ctx);
sl@0: 	  *ctx = NULL;
sl@0: 	  errno = save_errno;
sl@0: 	  return 0;
sl@0: 	}
sl@0:     }
sl@0: 
sl@0:   direntry = readdir((*ctx)->dir);
sl@0:   if (direntry == NULL)
sl@0:     {
sl@0:       return 0;
sl@0:     }
sl@0: 
sl@0:   strncpy((*ctx)->entry_name, direntry->d_name, sizeof((*ctx)->entry_name) - 1);
sl@0:   (*ctx)->entry_name[sizeof((*ctx)->entry_name) - 1] = '\0';
sl@0:   return (*ctx)->entry_name;
sl@0: }
sl@0: 
sl@0: EXPORT_C int LP_find_file_end(LP_DIR_CTX **ctx)
sl@0: {
sl@0:   if (ctx != NULL && *ctx != NULL)
sl@0:     {
sl@0:       int ret = closedir((*ctx)->dir);
sl@0: 
sl@0:       free(*ctx);
sl@0:       switch (ret)
sl@0: 	{
sl@0: 	case 0:
sl@0: 	  return 1;
sl@0: 	case -1:
sl@0: 	  return 0;
sl@0: 	default:
sl@0: 	  break;
sl@0: 	}
sl@0:     }
sl@0:   errno = EINVAL;
sl@0:   return 0;
sl@0: }