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1 /*
2  * Copyright 2011, The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *     http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 #include "helper.h"
18 #include "raw_ostream.h"
19 
20 #include <stdlib.h>
21 #include <ctype.h>
22 
23 using namespace llvm;
24 
dump_hex(unsigned char const * data,size_t size,size_t begin,size_t end)25 void dump_hex(unsigned char const *data,
26               size_t size, size_t begin, size_t end) {
27   if (end <= begin) {
28     // Nothing to print now.  Return directly.
29     return;
30   }
31 
32   size_t lower = begin & (~0xfUL);
33   size_t upper = (end & (~0xfUL)) ? end : ((end + 16UL) & (~0xfUL));
34 
35   for (size_t i = lower; i < upper; i += 16) {
36     out() << format("%08x", i) << ':';
37 
38     if (i < begin) {
39       out().changeColor(raw_ostream::MAGENTA);
40     }
41 
42     for (size_t j = i, k = i + 16; j < k; ++j) {
43       if (j == begin) {
44         out().resetColor();
45       }
46 
47       if (j == end) {
48         out().changeColor(raw_ostream::MAGENTA);
49       }
50 
51       if (j < size) {
52         out() << ' ' << format("%02x", (unsigned)data[j]);
53       }
54     }
55 
56     out().resetColor();
57     out() << "  ";
58 
59     for (size_t j = i, k = i + 16; j < k; ++j) {
60       if (data[j] > 0x20 && data[j] < 0x7f) {
61         out() << (char)data[j];
62       } else {
63         out() << '.';
64       }
65     }
66 
67     out() << '\n';
68   }
69 }
70