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/**
* @file
*
* @brief Dump Buffer
* @ingroup libmisc_dumpbuf Print Memory Buffer
*/
/*
* COPYRIGHT (c) 1997-2015.
* On-Line Applications Research Corporation (OAR).
*
* The license and distribution terms for this file may in
* the file LICENSE in this distribution or at
* http://www.rtems.org/license/LICENSE.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <rtems/dumpbuf.h>
#include <rtems/bspIo.h>
#define HEX_FMT_LENGTH 3 /* Length of the formatted hex string. */
#define ASCII_FMT_LENGTH 1 /* Length of the formatted ASCII string. */
#define BYTES_PER_ROW 16 /* Amount of bytes from buffer shown in each row. */
#define BARS 2 /* Amount of bars in each row. */
/* Max length of each row string. */
#define ROW_LENGTH (BYTES_PER_ROW * (HEX_FMT_LENGTH + ASCII_FMT_LENGTH) + BARS)
/*
* Put the body below rtems_print_buffer so it won't get inlined.
*/
static void Dump_Line(const unsigned char *buffer, const unsigned int length);
/**
* @brief Print \p length bytes from \p buffer, both in hex and ASCII.
* Printing will be done in rows, each showing BYTES_PER_ROW bytes.
* @details Non-printable chars will appear as dots.
*
* @param buffer The buffer we'll print.
* @param length Amount of bytes from \p buffer we'll print. This can't be
* unsigned because we don't have a way to check if we're erroneously getting
* a negative \p length.
*/
void rtems_print_buffer(const unsigned char *buffer, const int length)
{
unsigned int i, mod, max;
if (length > 0) {
mod = length % BYTES_PER_ROW;
max = length - mod;
/* Print length / BYTES_PER_ROW rows. */
for (i = 0; i < max; i += BYTES_PER_ROW) {
Dump_Line(&buffer[i], BYTES_PER_ROW);
}
/* Print another row with the remaining bytes. */
if (mod > 0) {
Dump_Line(&buffer[max], mod);
}
} else {
printk("Error: length must be greater than zero.");
}
}
static char const hexlist[] = "0123456789abcdef";
/**
* @brief Print \p length bytes from \p buffer, both in hex and ASCII.
* @details Non-printable chars will appear as dots.
*
* @param buffer The buffer we'll print.
* @param length Amount of bytes from \p buffer we'll print.
*/
static void Dump_Line(const unsigned char *buffer, const unsigned int length)
{
unsigned int i;
/* Output the hex value of each byte. */
for (i = 0; i < length; ++i) {
unsigned char c = buffer[i];
rtems_putc(hexlist[(c >> 4) & 0xf]);
rtems_putc(hexlist[c & 0xf]);
rtems_putc(' ');
}
/* Fill the remaining space with whitespace (if necessary). */
for (; i < BYTES_PER_ROW; ++i) {
rtems_putc(' ');
rtems_putc(' ');
rtems_putc(' ');
}
/* Append a bar. */
rtems_putc('|');
/* Now output the ASCII glyphs of printable chars. */
for (i = 0; i < length; ++i) {
unsigned char c = buffer[i];
rtems_putc(isprint(c) ? c : '.');
}
/* Fill the remaining space with whitespace (if necessary). */
for(; i < BYTES_PER_ROW; i++) {
rtems_putc(' ');
}
/* Append another bar and print the resulting string. */
rtems_putc('|');
rtems_putc('\n');
}
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