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/*
Copyright (C) 2015-2020, Dirk Krause
SPDX-License-Identifier: BSD-3-Clause
*/
/*
WARNING: This file was generated by the dkct program (see
http://dktools.sourceforge.net/ for details).
Changes you make here will be lost if dkct is run again!
You should modify the original source and run dkct on it.
Original source: dk4bf.ctr
*/
#ifndef DK4BF_H_INCLUDED
/** Avoid multiple inclusions. */
#define DK4BF_H_INCLUDED 1
#line 10 "dk4bf.ctr"
/** @file dk4bf.h Bit fields.
*/
#ifndef DK4CONF_H_INCLUDED
#if DK4_BUILDING_DKTOOLS4
#include "dk4conf.h"
#else
#include <dktools-4/dk4conf.h>
#endif
#endif
#ifndef DK4ERROR_H_INCLUDED
#if DK4_BUILDING_DKTOOLS4
#include "dk4error.h"
#else
#include <dktools-4/dk4error.h>
#endif
#endif
/** Bit field structure.
*/
typedef struct {
unsigned char *d; /**< Data buffer. */
size_t s; /**< Number of bits in the array. */
} dk4_bit_field_t;
#ifdef __cplusplus
extern "C" {
#endif
/** Open bit field.
@param sz Size of the bit field (number of bits).
@param erp Error report, may be NULL.
@return Pointer to new bit field on success, NULL on error.
Error codes:
- DK4_E_INVALID_ARGUMENTS<br>
if sz is 0,
- DK4_E_MEMORY_ALLOCATION_FAILED<br>
if not enough memory was available.
*/
dk4_bit_field_t *
dk4bf_open(size_t sz, dk4_er_t *erp);
/** Set one bit in a bit field.
@param dptr Bit field.
@param bitno Index of bit to modify.
@param val Bit value.
@param erp Error report, may be NULL.
@return 1 on success, 0 on error.
Error codes:
- DK4_E_INVALID_ARGUMENTS<br>
if dptr is 0 or bitno is outside the bit field size.
*/
int
dk4bf_set(dk4_bit_field_t *dptr, size_t bitno, int val, dk4_er_t *erp);
/** Retrieve one value from bit field.
@param dptr Address of result variable.
@param bfptr Bit field.
@param bitno Number of bit to obtain.
@param erp Error report, may be NULL.
@return 1 on success (dptr set), 0 on error (dptr unchanged).
Error codes:
- DK4_E_INVALID_ARGUMENTS<br>
if dptr or bfptr is NULL or bitno is outside the bit field size.
*/
int
dk4bf_get(int *dptr, dk4_bit_field_t const *bfptr, size_t bitno, dk4_er_t *erp);
/** Close bit field.
@param ptr Pointer to bit field previously opened using
dk4bf_open().
*/
void
dk4bf_close(dk4_bit_field_t *ptr);
#ifdef __cplusplus
}
#endif
#endif
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