mirror of
https://github.com/cc65/cc65.git
synced 2024-12-27 00:29:31 +00:00
113 lines
4.0 KiB
C
113 lines
4.0 KiB
C
/*****************************************************************************/
|
|
/* */
|
|
/* opendir.h */
|
|
/* */
|
|
/* Open a directory */
|
|
/* */
|
|
/* */
|
|
/* */
|
|
/* (C) 2005 Oliver Schmidt, <ol.sc@web.de> */
|
|
/* */
|
|
/* */
|
|
/* This software is provided 'as-is', without any expressed or implied */
|
|
/* warranty. In no event will the authors be held liable for any damages */
|
|
/* arising from the use of this software. */
|
|
/* */
|
|
/* Permission is granted to anyone to use this software for any purpose, */
|
|
/* including commercial applications, and to alter it and redistribute it */
|
|
/* freely, subject to the following restrictions: */
|
|
/* */
|
|
/* 1. The origin of this software must not be misrepresented; you must not */
|
|
/* claim that you wrote the original software. If you use this software */
|
|
/* in a product, an acknowledgment in the product documentation would be */
|
|
/* appreciated but is not required. */
|
|
/* 2. Altered source versions must be plainly marked as such, and must not */
|
|
/* be misrepresented as being the original software. */
|
|
/* 3. This notice may not be removed or altered from any source */
|
|
/* distribution. */
|
|
/* */
|
|
/*****************************************************************************/
|
|
|
|
|
|
|
|
#include <stddef.h>
|
|
#include <stdlib.h>
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <fcntl.h>
|
|
#include <errno.h>
|
|
#include <dirent.h>
|
|
#include <dir.h>
|
|
|
|
|
|
|
|
/*****************************************************************************/
|
|
/* Data */
|
|
/*****************************************************************************/
|
|
|
|
|
|
|
|
extern char _cwd[FILENAME_MAX];
|
|
|
|
|
|
|
|
/*****************************************************************************/
|
|
/* Code */
|
|
/*****************************************************************************/
|
|
|
|
|
|
|
|
DIR* __fastcall__ opendir (register const char* name)
|
|
{
|
|
register DIR* dir;
|
|
|
|
/* Alloc DIR */
|
|
if ((dir = malloc (sizeof (*dir))) == NULL) {
|
|
|
|
/* May not have been done by malloc() */
|
|
_directerrno (ENOMEM);
|
|
|
|
/* Return failure */
|
|
return NULL;
|
|
}
|
|
|
|
/* Interpret dot as current working directory */
|
|
if (*name == '.') {
|
|
name = _cwd;
|
|
}
|
|
|
|
/* Open directory file */
|
|
if ((dir->fd = open (name, O_RDONLY)) != -1) {
|
|
|
|
/* Read directory key block */
|
|
if (read (dir->fd,
|
|
dir->block.bytes,
|
|
sizeof (dir->block)) == sizeof (dir->block)) {
|
|
|
|
/* Get directory entry infos from directory header */
|
|
dir->entry_length = dir->block.bytes[0x23];
|
|
dir->entries_per_block = dir->block.bytes[0x24];
|
|
|
|
/* Skip directory header entry */
|
|
dir->current_entry = 1;
|
|
|
|
/* Return success */
|
|
return dir;
|
|
}
|
|
|
|
/* EOF: Most probably no directory file at all */
|
|
if (_oserror == 0) {
|
|
_directerrno (EINVAL);
|
|
}
|
|
|
|
/* Cleanup directory file */
|
|
close (dir->fd);
|
|
}
|
|
|
|
/* Cleanup DIR */
|
|
free (dir);
|
|
|
|
/* Return failure */
|
|
return NULL;
|
|
}
|