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86 lines
2.0 KiB
C
86 lines
2.0 KiB
C
/* hexdump.c - hexdump function */
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/*
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* GRUB -- GRand Unified Bootloader
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* Copyright (C) 2008,2009 Free Software Foundation, Inc.
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*
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* GRUB is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* GRUB is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with GRUB. If not, see <http://www.gnu.org/licenses/>.
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*/
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#include <grub/types.h>
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#include <grub/misc.h>
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#include <grub/lib/hexdump.h>
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void
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hexdump (unsigned long bse, char *buf, int len)
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{
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int pos;
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char line[80];
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while (len > 0)
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{
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int cnt, i;
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pos = grub_snprintf (line, sizeof (line), "%08lx ", bse);
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cnt = 16;
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if (cnt > len)
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cnt = len;
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for (i = 0; i < cnt; i++)
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{
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pos += grub_snprintf (&line[pos], sizeof (line) - pos,
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"%02x ", (unsigned char) buf[i]);
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if ((i & 7) == 7)
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line[pos++] = ' ';
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}
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for (; i < 16; i++)
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{
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pos += grub_snprintf (&line[pos], sizeof (line) - pos, " ");
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if ((i & 7) == 7)
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line[pos++] = ' ';
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}
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line[pos++] = '|';
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for (i = 0; i < cnt; i++)
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line[pos++] = ((buf[i] >= 32) && (buf[i] < 127)) ? buf[i] : '.';
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line[pos++] = '|';
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line[pos] = 0;
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grub_printf ("%s\n", line);
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/* Print only first and last line if more than 3 lines are identical. */
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if (len >= 4 * 16
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&& ! grub_memcmp (buf, buf + 1 * 16, 16)
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&& ! grub_memcmp (buf, buf + 2 * 16, 16)
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&& ! grub_memcmp (buf, buf + 3 * 16, 16))
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{
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grub_printf ("*\n");
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do
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{
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bse += 16;
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buf += 16;
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len -= 16;
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}
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while (len >= 3 * 16 && ! grub_memcmp (buf, buf + 2 * 16, 16));
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}
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bse += 16;
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buf += 16;
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len -= cnt;
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}
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}
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