1 
 2 /*
 3  * Copyright (c) 2024, Oracle and/or its affiliates. All rights reserved.
 4  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 5  *
 6  * This code is free software; you can redistribute it and/or modify it
 7  * under the terms of the GNU General Public License version 2 only, as
 8  * published by the Free Software Foundation.  Oracle designates this
 9  * particular file as subject to the "Classpath" exception as provided
10  * by Oracle in the LICENSE file that accompanied this code.
11  *
12  * This code is distributed in the hope that it will be useful, but WITHOUT
13  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
14  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
15  * version 2 for more details (a copy is included in the LICENSE file that
16  * accompanied this code).
17  *
18  * You should have received a copy of the GNU General Public License version
19  * 2 along with this work; if not, write to the Free Software Foundation,
20  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
21  *
22  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
23  * or visit www.oracle.com if you need additional information or have any
24  * questions.
25  */
26 
27 #include <sstream>
28 #include <iomanip>
29 
30 
31 #include "hex.h"
32 
33 
34 void Hex::ascii(std::ostream &s, char c) {
35     if (::iscntrl(c)) {
36         if (c == '\a') {
37             s << "\\a ";
38         } else if (c == '\r') {
39             s << "\\r ";
40         } else if (c == '\n') {
41             s << "\\n ";
42         } else if (c == '\t') {
43             s << "\\t ";
44         } else {
45             s << "?? ";
46         }
47     } else {
48         s << c << "  ";
49     }
50 }
51 
52 void Hex::hex(std::ostream &s, char c) {
53     s << std::hex << std::setw(2) << std::setfill('0') << std::uppercase << (c & 0xff) << " ";
54 }
55 
56 void Hex::bytes(std::ostream &s, char *p, size_t len, std::function<void(std::ostream &)> prefix) {
57     for (int i = 0; i < len; i++) {
58         if ((i % 16) == 0) {
59             if (i > 0) {
60                 s << "  ";
61                 for (int c = i - 16; c < i; c++) {
62                     ascii(s, p[c]);
63                 }
64             }
65             s << std::endl;
66             prefix(s);
67             s << std::hex << std::setw(6) << std::setfill('0') << i << " ";
68         }
69         hex(s, p[i]);
70     }
71 
72     if ((len % 16) == 0) {
73         s << "  ";
74         for (int c = len - 16; c < len; c++) {
75             ascii(s, p[c]);
76         }
77     } else {
78         for (int v = len % 16; v < 16; v++) {
79             s << "   ";
80         }
81         s << "  ";
82         for (int c = len - (len % 16); c < len; c++) {
83             ascii(s, p[c]);
84         }
85 
86     }
87 
88 
89 }
90 
91 
92 
93