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/* Copyright (C) 2001-2023 Artifex Software, Inc.
All Rights Reserved.
This software is provided AS-IS with no warranty, either express or
implied.
This software is distributed under license and may not be copied,
modified or distributed except as expressly authorized under the terms
of the license contained in the file LICENSE in this distribution.
Refer to licensing information at http://www.artifex.com or contact
Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
CA 94129, USA, for further information.
*/
#ifndef __RAMFS_H__
#define __RAMFS_H__
#include "stream.h"
#define RAMFS_BLOCKSIZE 1024
typedef struct _ramfs ramfs;
typedef struct _ramdirent ramdirent;
typedef struct _ramhandle ramhandle;
typedef struct _ramfs_enum ramfs_enum;
/*
ramfs_new: NOMEM
ramfs_open: NOTFOUND
ramfs_unlink: NOTFOUND
ramfs_enum_new: NOMEM
ramfs_enum_next: none
ramfs_enum_end: none
ramfile_read: none
ramfile_write: NOSPACE, NOMEM, NOACCESS
ramfile_seek: none
ramfile_pos: none
ramfile_close: none
*/
/* Error constants */
#define RAMFS_NOTFOUND 2
#define RAMFS_NOACCESS 5
#define RAMFS_NOMEM 6
#define RAMFS_NOSPACE 7
/* Open mode flags */
#define RAMFS_READ s_mode_read /* 1 */
#define RAMFS_WRITE s_mode_write /* 2 */
#define RAMFS_SEEK s_mode_seek /* 4 */
#define RAMFS_APPEND s_mode_append /* 8 */
#define RAMFS_CREATE 16
#define RAMFS_TRUNC 32
#define RAMFS_SEEK_SET 0
#define RAMFS_SEEK_CUR 1
#define RAMFS_SEEK_END 2
ramfs * ramfs_new(gs_memory_t *mem, int size); /* size is in KiB */
void ramfs_destroy(gs_memory_t *, ramfs * fs);
int ramfs_error(const ramfs * fs);
ramhandle * ramfs_open(gs_memory_t *mem, ramfs * fs,const char * filename,int mode);
int ramfs_blocksize(ramfs * fs);
int ramfs_blocksfree(ramfs * fs);
int ramfs_unlink(ramfs * fs,const char *filename);
int ramfs_rename(ramfs * fs,const char *oldname,const char *newname);
ramfs_enum * ramfs_enum_new(ramfs * fs);
char* ramfs_enum_next(ramfs_enum * e);
void ramfs_enum_end(ramfs_enum * e);
int ramfile_read(ramhandle * handle,void * buf,int len);
int ramfile_write(ramhandle * handle,const void * buf,int len);
int ramfile_seek(ramhandle * handle,int pos,int whence);
int ramfile_eof(ramhandle * handle);
int ramfile_tell(ramhandle * handle);
int ramfile_size(ramhandle * handle);
void ramfile_close(ramhandle * handle);
int ramfile_error(ramhandle * handle);
#endif /* __RAMFS_H__ */
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