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/* stream.h - internal definiton for the STREAM object
* Copyright (C) 2002, 2003, 2007 Timo Schulz
*
* This file is part of OpenCDK.
*
* OpenCDK is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* OpenCDK is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*/
#ifndef CDK_STREAM_H
#define CDK_STREAM_H
/* The default buffer size for the stream. */
#define STREAM_BUFSIZE 8192
enum {
fDUMMY = 0,
fARMOR = 1,
fCIPHER = 2,
fLITERAL = 3,
fCOMPRESS= 4,
fHASH = 5,
fTEXT = 6
};
/* Type definition for the filter function. */
typedef int (*filter_fnct_t) (void * opaque, int ctl, FILE * in, FILE * out);
/* The stream filter context structure. */
struct stream_filter_s
{
struct stream_filter_s *next;
filter_fnct_t fnct;
void *opaque;
FILE *tmp;
union {
armor_filter_t afx;
cipher_filter_t cfx;
literal_filter_t pfx;
compress_filter_t zfx;
text_filter_t tfx;
md_filter_t mfx;
} u;
struct {
unsigned enabled:1;
unsigned rdonly:1;
unsigned error:1;
} flags;
unsigned type;
unsigned ctl;
};
/* The stream context structure. */
struct cdk_stream_s {
struct stream_filter_s *filters;
int fmode;
int error;
size_t blkmode;
struct {
unsigned filtrated:1;
unsigned eof:1;
unsigned write:1;
unsigned temp:1;
unsigned reset:1;
unsigned no_filter:1;
unsigned compressed:3;
} flags;
struct {
unsigned char *buf;
unsigned on:1;
size_t size;
size_t alloced;
} cache;
char *fname;
FILE *fp;
unsigned int fp_ref:1;
struct cdk_stream_cbs_s cbs;
void *cbs_hd;
};
#endif /* CDK_STREAM_H */
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