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comparison rvinterf/libprint/hexdump.c @ 928:65953c172f24

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rvinterf/lowlevel: new hex dump format
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 23 May 2023 05:23:19 +0000
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927:4e243402f453 928:65953c172f24
1 /*
2 * The function contained in this module implements hex dump functionality:
3 * an arbitrary binary packet is dumped in hex, line by line, calling an output
4 * function for each line.
5 */
6
7 #include <sys/types.h>
8 #include <stdio.h>
9 #include <string.h>
10 #include <strings.h>
11
12 void
13 packet_hex_dump(src, srclen, outfunc)
14 u_char *src;
15 unsigned srclen;
16 void (*outfunc)();
17 {
18 u_char *sp = src;
19 unsigned remain = srclen;
20 unsigned offset = 0;
21 unsigned chunk;
22 char line[80], *dp;
23 int i, c;
24
25 while (remain) {
26 sprintf(line, "%04X: ", offset);
27 dp = line + 7;
28 chunk = remain;
29 if (chunk > 16)
30 chunk = 16;
31 for (i = 0; i < 16; i++) {
32 if (i < chunk)
33 sprintf(dp, "%02X ", sp[i]);
34 else
35 strcpy(dp, " ");
36 dp += 3;
37 if (i == 7 || i == 15)
38 *dp++ = ' ';
39 }
40 for (i = 0; i < chunk; i++) {
41 c = sp[i];
42 if (c < ' ' || c > '~')
43 c = '.';
44 *dp++ = c;
45 }
46 *dp = '\0';
47 outfunc(line);
48 sp += chunk;
49 remain -= chunk;
50 offset += chunk;
51 }
52 }