hfs-407.1.3.tar.gz
[apple/hfs.git] / CopyHFSMeta / dump.c
CommitLineData
a56bdb9d
A
1#include <stdio.h>
2#include <ctype.h>
3#include <unistd.h>
4
5#define MIN(a, b) \
6 ({ __typeof(a) _a = (a); __typeof(b) _b = (b); \
7 (_a < _b) ? _a : _b; })
8
9enum { WIDTH = 16, };
10
11/*
12 * Debug functions only.
13 */
14void
15DumpData(const void *data, size_t len)
16{
17 unsigned char *base = (unsigned char*)data;
18 unsigned char *end = base + len;
19 unsigned char *cp = base;
20 int allzeroes = 0;
21
22 while (cp < end) {
23 unsigned char *tend = MIN(end, cp + WIDTH);
24 unsigned char *tmp;
25 int i;
26 size_t gap = (cp + WIDTH) - tend;
27
28 if (gap != 0 || tend == end)
29 allzeroes = 0;
30 if (allzeroes) {
31 for (tmp = cp; tmp < tend; tmp++) {
32 if (*tmp) {
33 allzeroes = 0;
34 break;
35 }
36 }
37 if (allzeroes == 1) {
38 printf(". . .\n");
39 allzeroes = 2;
40 }
41 if (allzeroes) {
42 cp += WIDTH;
43 continue;
44 }
45 }
46 allzeroes = 1;
47
48 printf("%04x: ", (int)(cp - base));
49 for (i = 0, tmp = cp; tmp < tend; tmp++) {
50 printf("%02x", *tmp);
51 if (++i % 2 == 0)
52 printf(" ");
53 if (*tmp)
54 allzeroes = 0;
55 }
56 for (i = gap; i >= 0; i--) {
57 printf(" ");
58 if (i % 2 == 1)
59 printf(" ");
60 }
61 printf(" |");
62 for (tmp = cp; tmp < tend; tmp++) {
63 printf("%c", isalnum(*tmp) ? *tmp : '.');
64 }
65 for (i = 0; i < gap; i++) {
66 printf(" ");
67 }
68 printf("|\n");
69 cp += WIDTH;
70 }
71
72 return;
73
74}