util/nvramtool/hexdump.h

/* SPDX-License-Identifier: BSD-3-Clause or GPL-2.0 */

#ifndef _HEXDUMP_H
#define _HEXDUMP_H

#include <stdint.h>
#include <sys/types.h>
#include <stdio.h>

/*--------------------------------------------------------------------------
 * hexdump_format_t
 *
 * This specifies how the output of the 'hexdump' function should look.
 *
 * fields:
 *     bytes_per_line:  the number of data bytes to display per line of
 *                      output
 *     addrprint_width: Each line of output begins with the address of the
 *                      first data byte displayed on that line.  This
 *                      specifies the number of bytes wide the address
 *                      should be displayed as.  This value must be from 1
 *                      to 8.
 *     indent:          This is a string to display at the start of each
 *                      output line.  Its purpose is to indent the output.
 *     sep1:            This is a string to display between the address and
 *                      the bytes of data displayed in hex.  It serves as a
 *                      separator.
 *     sep2:            This is a string to display between individual hex
 *                      values.  It serves as a separator.
 *     sep3:            This is a string to display between the bytes of
 *                      data in hex and the bytes of data displayed as
 *                      characters.  It serves as a separator.
 *     nonprintable:    This is a substitute character to display in place
 *                      of nonprintable characters.
 *--------------------------------------------------------------------------*/
typedef struct {
	int bytes_per_line;
	int addrprint_width;
	const char *indent;
	const char *sep1;
	const char *sep2;
	const char *sep3;
	unsigned char nonprintable;
} hexdump_format_t;

/*--------------------------------------------------------------------------
 * hexdump
 *
 * Write a hex dump of 'mem' to 'outfile'.
 *
 * parameters:
 *     mem:             a pointer to the memory to display
 *     bytes:           the number of bytes of data to display
 *     addrprint_start: The address to associate with the first byte of
 *                      data.  For instance, a value of 0 indicates that the
 *                      first byte displayed should be labeled as byte 0.
 *     outfile:         The place where the hex dump should be written.
 *                      For instance, stdout or stderr may be passed here.
 *     format:          A structure specifying how the hex dump should be
 *                      formatted.
 *--------------------------------------------------------------------------*/
void hexdump(const void *mem, int bytes, uint64_t addrprint_start,
	     FILE * outfile, const hexdump_format_t * format);

#endif				/* _HEXDUMP_H */