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/* vim: set sw=8 ts=8 sts=8 noet: */
/* capnp_c.h
*
* Copyright (C) 2013 James McKaskill
* Copyright (C) 2014 Steve Dee
*
* This software may be modified and distributed under the terms
* of the MIT license. See the LICENSE file for details.
*/
/*
* functions / structures in this header are private to the capnproto-c
* library; applications should not call or use them.
*/
#ifndef CAPNP_PRIV_H
#define CAPNP_PRIV_H
#include "capnp_c.h"
#if defined(__GNUC__) && __GNUC__ >= 4
# define intern __attribute__((visibility ("internal")))
#else
# define intern /**/
#endif
/* capn_stream encapsulates the needed fields for capn_(deflate|inflate) in a
* similar manner to z_stream from zlib
*
* The user should set next_in, avail_in, next_out, avail_out to the
* available in/out buffers before calling capn_(deflate|inflate).
*
* Other fields should be zero initialized.
*/
struct capn_stream {
const uint8_t *next_in;
size_t avail_in;
uint8_t *next_out;
size_t avail_out;
unsigned zeros, raw;
uint8_t inflate_buf[8];
size_t avail_buf;
};
#define CAPN_MISALIGNED -1
#define CAPN_NEED_MORE -2
/* capn_deflate deflates a stream to the packed format
* capn_inflate inflates a stream from the packed format
*
* Returns:
* CAPN_MISALIGNED - if the unpacked data is not 8 byte aligned
* CAPN_NEED_MORE - more packed data/room is required (out for inflate, in for
* deflate)
* 0 - success, all output for inflate, all input for deflate processed
*/
intern int capn_deflate(struct capn_stream*);
intern int capn_inflate(struct capn_stream*);
#endif /* CAPNP_PRIV_H */
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