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/*
* Author: Bob Withers
* Copyright (c) 1993, All Rights Reserved
*
* NOTICE
*
* Permission to use, copy, modify, and distribute this software and
* its documentation for any purpose and without fee is hereby granted
* provided that the above copyright notice appears in all copies and
* that both the copyright notice and this permission notice appear in
* supporting documentation.
*
* The author makes no representations about the suitability of this
* software for any purpose. This software is provided ``as is''
* without express or implied warranty.
*/
#include <stdlib.h>
#include <string.h>
#define INCL_DOSFILEMGR
#define INCL_DOSERRORS
#include <os2.h>
#include "dirent.h"
#define DIRENT_INCR 25
DIR *opendir(char *filename)
{
auto size_t len;
auto DIR *dirp;
auto char *p;
auto HDIR hdir;
#ifdef OS2_16
auto USHORT rc; /* for 16 bit OS/2 */
auto FILEFINDBUF ff;
auto USHORT cnt;
#else
auto APIRET rc; /* for 32 bit OS/2 */
auto FILEFINDBUF3 ff;
auto ULONG cnt;
#endif /* OS2_16 */
if (NULL == filename || '\0' == filename[0])
filename = ".";
dirp = malloc(sizeof(*dirp));
if (NULL == dirp)
return(NULL);
len = strlen(filename);
dirp->dirname = malloc(len + 5);
if (NULL == dirp->dirname)
{
free(dirp);
return(NULL);
}
dirp->max_ent = 0;
dirp->tot_ent = 0;
dirp->cur_ent = 0;
dirp->entp = NULL;
strcpy(dirp->dirname, filename);
for (p = dirp->dirname; *p; ++p)
{
if ('/' == *p)
*p = '\\';
}
if ('\\' != dirp->dirname[len - 1])
strcat(dirp->dirname, "\\");
strcat(dirp->dirname, "*.*");
hdir = HDIR_SYSTEM;
cnt = 1;
rc = DosFindFirst(dirp->dirname, &hdir,
FILE_NORMAL | FILE_READONLY | FILE_HIDDEN |
FILE_SYSTEM | FILE_DIRECTORY | FILE_ARCHIVED,
&ff, sizeof(ff), &cnt, FIL_STANDARD);
while (NO_ERROR == rc)
{
auto struct dirent *entp;
if (dirp->tot_ent >= dirp->max_ent)
{
auto struct dirent **p;
dirp->max_ent += DIRENT_INCR;
p = realloc(dirp->entp, dirp->max_ent * sizeof(entp));
if (NULL == p)
{
rc = ERROR_NOT_ENOUGH_MEMORY;
break;
}
dirp->entp = p;
}
entp = malloc(sizeof(*entp) + (size_t) ff.cchName);
if (NULL == entp)
{
rc = ERROR_NOT_ENOUGH_MEMORY;
break;
}
entp->d_ino = 0;
entp->d_off = dirp->tot_ent;
entp->d_namlen = (unsigned short) ff.cchName;
memcpy(entp->d_name, ff.achName, entp->d_namlen);
entp->d_name[entp->d_namlen] = '\0';
dirp->entp[dirp->tot_ent++] = entp;
cnt = 1;
rc = DosFindNext(hdir, &ff, sizeof(ff), &cnt);
}
DosFindClose(hdir);
if (ERROR_NO_MORE_FILES == rc)
return(dirp);
closedir(dirp);
return(NULL);
}
struct dirent *readdir(DIR *dirp)
{
if (dirp->cur_ent < 0 || dirp->cur_ent >= dirp->tot_ent)
return(NULL);
return(dirp->entp[dirp->cur_ent++]);
}
long telldir(DIR *dirp)
{
return((long) dirp->cur_ent);
}
void seekdir(DIR *dirp, long loc)
{
dirp->cur_ent = (int) loc;
return;
}
void rewinddir(DIR *dirp)
{
dirp->cur_ent = 0;
return;
}
void closedir(DIR *dirp)
{
if (dirp)
{
if (dirp->dirname)
free(dirp->dirname);
if (dirp->entp)
{
register int i;
for (i = 0; i < dirp->tot_ent; ++i)
free(dirp->entp[i]);
free(dirp->entp);
}
}
return;
}
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