/usr/include/hdf/cnbit.h is in libhdf4-alt-dev 4.2.13-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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* Copyright by The HDF Group. *
* Copyright by the Board of Trustees of the University of Illinois. *
* All rights reserved. *
* *
* This file is part of HDF. The full HDF copyright notice, including *
* terms governing use, modification, and redistribution, is contained in *
* the COPYING file, which can be found at the root of the source code *
* distribution tree, or in https://support.hdfgroup.org/ftp/HDF/releases/. *
* If you do not have access to either file, you may request a copy from *
* help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/* $Id$ */
/*-----------------------------------------------------------------------------
* File: cnbit.h
* Purpose: Header file for N-bit encoding information.
* Dependencies: should only be included from hcompi.h
* Invokes: none
* Contents: Structures & definitions for N-bit encoding.
* Structure definitions:
* Constant definitions:
*---------------------------------------------------------------------------*/
/* avoid re-inclusion */
#ifndef __CNBIT_H
#define __CNBIT_H
#if defined c_plusplus || defined __cplusplus
extern "C"
{
#endif /* c_plusplus || __cplusplus */
/*
** from cnbit.c
*/
extern int32 HCPcnbit_stread
(accrec_t * rec);
extern int32 HCPcnbit_stwrite
(accrec_t * rec);
extern int32 HCPcnbit_seek
(accrec_t * access_rec, int32 offset, int origin);
extern int32 HCPcnbit_inquire
(accrec_t * access_rec, int32 *pfile_id, uint16 *ptag, uint16 *pref,
int32 *plength, int32 *poffset, int32 *pposn, int16 *paccess,
int16 *pspecial);
extern int32 HCPcnbit_read
(accrec_t * access_rec, int32 length, void * data);
extern int32 HCPcnbit_write
(accrec_t * access_rec, int32 length, const void * data);
extern intn HCPcnbit_endaccess
(accrec_t * access_rec);
#if defined c_plusplus || defined __cplusplus
}
#endif /* c_plusplus || __cplusplus */
/* size of the N-bit buffer */
#define NBIT_BUF_SIZE (MAX_NT_SIZE*64)
/* size of the N-bit mask buffer (same as buffer size for now) */
#define NBIT_MASK_SIZE (MAX_NT_SIZE)
typedef struct
{ /* structure to hold bit vector info */
intn offset, /* offset of the bit information */
length; /* number of bits in the information */
uint8 mask; /* mask for this bit vector */
}
nbit_mask_info_t;
/* N-bit [en|de]coding information */
typedef struct
{
int32 nt; /* number type of data we are encoding */
intn nt_size; /* size of the number-type in the file */
intn fill_one; /* whether to fill with 1's or not (0's) */
intn sign_ext; /* whether to sign extend or not */
uint8 buffer[NBIT_BUF_SIZE]; /* buffer for expanding n-bit data in */
intn buf_pos; /* current offset in the expansion buffer */
intn mask_off, /* offset of the bit to start masking with */
mask_len; /* number of bits to mask */
int32 offset; /* offset in the file in terms of bytes */
uint8 mask_buf[NBIT_MASK_SIZE]; /* buffer to hold the bitmask */
nbit_mask_info_t mask_info[NBIT_MASK_SIZE]; /* information about the mask */
intn nt_pos; /* current byte to read or write */
}
comp_coder_nbit_info_t;
#ifndef CNBIT_MASTER
extern funclist_t cnbit_funcs; /* functions to perform N-bit encoding */
#else
funclist_t cnbit_funcs =
{ /* functions to perform N-bit encoding */
HCPcnbit_stread,
HCPcnbit_stwrite,
HCPcnbit_seek,
HCPcnbit_inquire,
HCPcnbit_read,
HCPcnbit_write,
HCPcnbit_endaccess
};
#endif
#endif /* __CNBIT_H */
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