/*
 * (C) 2005 Guido Serassio <guido.serassio@acmeconsulting.it>
 * Based on previous work of Francesco Chemolli and Robert Collins
 * Distributed freely under the terms of the GNU General Public License,
 * version 2. See the file COPYING for licensing details
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.

 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
 */

typedef unsigned char uchar;

#include "util.h"
#include "negotiate.h"
#if HAVE_CTYPE_H
#include <ctype.h>
#endif

void hex_dump(void *data, int size)
{
    /* dumps size bytes of *data to stdout. Looks like:
     * [0000] 75 6E 6B 6E 6F 77 6E 20
     *                  30 FF 00 00 00 00 39 00 unknown 0.....9.
     * (in a single line of course)
     */

    if (!data)
        return;

    if (debug_enabled) {
        unsigned char *p = data;
        unsigned char c;
        int n;
        char bytestr[4] = {0};
        char addrstr[10] = {0};
        char hexstr[ 16*3 + 5] = {0};
        char charstr[16*1 + 5] = {0};
        for (n=1;n<=size;n++) {
            if (n%16 == 1) {
                /* store address for this line */
                snprintf(addrstr, sizeof(addrstr), "%.4x",
                         ((unsigned int)p-(unsigned int)data) );
            }

            c = *p;
            if (xisalnum(c) == 0) {
                c = '.';
            }

            /* store hex str (for left side) */
            snprintf(bytestr, sizeof(bytestr), "%02X ", *p);
            strncat(hexstr, bytestr, sizeof(hexstr)-strlen(hexstr)-1);

            /* store char str (for right side) */
            snprintf(bytestr, sizeof(bytestr), "%c", c);
            strncat(charstr, bytestr, sizeof(charstr)-strlen(charstr)-1);

            if (n%16 == 0) {
                /* line completed */
                fprintf(stderr, "[%4.4s]   %-50.50s  %s\n", addrstr, hexstr, charstr);
                hexstr[0] = 0;
                charstr[0] = 0;
            } else if (n%8 == 0) {
                /* half line: add whitespaces */
                strncat(hexstr, "  ", sizeof(hexstr)-strlen(hexstr)-1);
                strncat(charstr, " ", sizeof(charstr)-strlen(charstr)-1);
            }
            p++; /* next byte */
        }

        if (strlen(hexstr) > 0) {
            /* print rest of buffer if not empty */
            fprintf(stderr, "[%4.4s]   %-50.50s  %s\n", addrstr, hexstr, charstr);
        }
    }
}

