helper.cpp revision 37dc0245523708194fd1a57b410bc35bde73f5fc 
1#include "helper.h"
2
3#include <iostream>
4#include <iomanip>
5
6#include <stdlib.h>
7
8#include "term.h"
9
10using namespace std;
11using namespace term::color;
12
13void dump_hex(unsigned char const *data,
14              size_t size, size_t begin, size_t end) {
15  if (end <= begin) {
16    // Nothing to print now.  Return directly.
17    return;
18  }
19
20  std::ios_base::fmtflags prev_flags = cout.flags();
21
22  size_t lower = begin & (~0xfUL);
23  size_t upper = (end & (~0xfUL)) ? end : ((end + 16UL) & (~0xfUL));
24
25  for (size_t i = lower; i < upper; i += 16) {
26    cout << hex << setfill('0') << setw(8) << right << i << ':';
27
28    if (i < begin) {
29      cout << dark::magenta();
30    }
31
32    for (size_t j = i, k = i + 16; j < k; ++j) {
33      if (j == begin) {
34        cout << normal();
35      }
36
37      if (j == end) {
38        cout << dark::magenta();
39      }
40
41      if (j < size) {
42        cout << ' ' << hex << setfill('0') << setw(2) << (unsigned)data[j];
43      }
44    }
45
46    // Only setw affects the next out, other will affect all outputs. So we
47    // should recover the flags.
48    cout.flags( prev_flags );
49
50    cout << normal() << endl;
51  }
52}
53