Calculate percentages using floating-point math, to avoid integer overflow
[unix-history] / usr.bin / hexdump / conv.c
CommitLineData
15637ed4
RG
1/*
2 * Copyright (c) 1989 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
32 */
33
34#ifndef lint
35static char sccsid[] = "@(#)conv.c 5.4 (Berkeley) 6/1/90";
36#endif /* not lint */
37
38#include <sys/types.h>
39#include <ctype.h>
40#include "hexdump.h"
41
42conv_c(pr, p)
43 PR *pr;
44 u_char *p;
45{
46 extern int deprecated;
47 char buf[10], *str;
48
49 switch(*p) {
50 case '\0':
51 str = "\\0";
52 goto strpr;
53 /* case '\a': */
54 case '\007':
55 if (deprecated) /* od didn't know about \a */
56 break;
57 str = "\\a";
58 goto strpr;
59 case '\b':
60 str = "\\b";
61 goto strpr;
62 case '\f':
63 str = "\\f";
64 goto strpr;
65 case '\n':
66 str = "\\n";
67 goto strpr;
68 case '\r':
69 str = "\\r";
70 goto strpr;
71 case '\t':
72 str = "\\t";
73 goto strpr;
74 case '\v':
75 if (deprecated)
76 break;
77 str = "\\v";
78 goto strpr;
79 default:
80 break;
81 }
82 if (isprint(*p)) {
83 *pr->cchar = 'c';
84 (void)printf(pr->fmt, *p);
85 } else {
86 (void)sprintf(str = buf, "%03o", (int)*p);
87strpr: *pr->cchar = 's';
88 (void)printf(pr->fmt, str);
89 }
90}
91
92conv_u(pr, p)
93 PR *pr;
94 u_char *p;
95{
96 extern int deprecated;
97 static char *list[] = {
98 "nul", "soh", "stx", "etx", "eot", "enq", "ack", "bel",
99 "bs", "ht", "lf", "vt", "ff", "cr", "so", "si",
100 "dle", "dcl", "dc2", "dc3", "dc4", "nak", "syn", "etb",
101 "can", "em", "sub", "esc", "fs", "gs", "rs", "us",
102 };
103
104 /* od used nl, not lf */
105 if (*p <= 0x1f) {
106 *pr->cchar = 's';
107 if (deprecated && *p == 0x0a)
108 (void)printf(pr->fmt, "nl");
109 else
110 (void)printf(pr->fmt, list[*p]);
111 } else if (*p == 0x7f) {
112 *pr->cchar = 's';
113 (void)printf(pr->fmt, "del");
114 } else if (deprecated && *p == 0x20) { /* od replace space with sp */
115 *pr->cchar = 's';
116 (void)printf(pr->fmt, " sp");
117 } else if (isprint(*p)) {
118 *pr->cchar = 'c';
119 (void)printf(pr->fmt, *p);
120 } else {
121 *pr->cchar = 'x';
122 (void)printf(pr->fmt, (int)*p);
123 }
124}