69 lines
1.9 KiB
C
69 lines
1.9 KiB
C
/*
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Show_dump 0.1.1a
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Copyright 2004,2005,2006 Luigi Auriemma
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This program 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 2 of the License, or
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(at your option) any later version.
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This program 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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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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http://www.gnu.org/licenses/gpl.txt
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This function, optimized for performace, shows the hex dump of a buffer and
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places it in a stream
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Usage:
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show_dump(buffer, buffer_length, stdout);
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show_dump(buffer, buffer_length, fd);
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*/
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#include <string.h>
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void show_dump(unsigned char *data, unsigned int len, FILE *stream) {
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const static char hex[] = "0123456789abcdef";
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static unsigned char buff[67]; /* HEX CHAR\n */
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unsigned char chr,
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*bytes,
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*p,
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*limit,
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*glimit = data + len;
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memset(buff + 2, ' ', 48);
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while(data < glimit) {
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limit = data + 16;
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if(limit > glimit) {
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limit = glimit;
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memset(buff, ' ', 48);
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}
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p = buff;
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bytes = p + 50;
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while(data < limit) {
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chr = *data;
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*p++ = hex[chr >> 4];
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*p++ = hex[chr & 15];
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p++;
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*bytes++ = ((chr < ' ') || (chr >= 0x7f)) ? '.' : chr;
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data++;
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}
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*bytes++ = '\n';
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fwrite(buff, bytes - buff, 1, stream);
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}
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}
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