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annotate compat/vis.c @ 12:1926dfc9feb0 version-1.0.0

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Release version 1.0.0
author Guido Berhoerster <guido+libpws@berhoerster.name>
date Sun, 04 Aug 2019 21:36:05 +0200
parents 97097b4b6bfb
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
1 /* $OpenBSD: vis.c,v 1.25 2015/09/13 11:32:51 guenther Exp $ */
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
2 /*-
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
3 * Copyright (c) 1989, 1993
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
4 * The Regents of the University of California. All rights reserved.
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
5 *
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
6 * Redistribution and use in source and binary forms, with or without
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
7 * modification, are permitted provided that the following conditions
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
8 * are met:
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
9 * 1. Redistributions of source code must retain the above copyright
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
10 * notice, this list of conditions and the following disclaimer.
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
11 * 2. Redistributions in binary form must reproduce the above copyright
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
12 * notice, this list of conditions and the following disclaimer in the
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
13 * documentation and/or other materials provided with the distribution.
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
14 * 3. Neither the name of the University nor the names of its contributors
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
15 * may be used to endorse or promote products derived from this software
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
16 * without specific prior written permission.
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
17 *
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
28 * SUCH DAMAGE.
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
29 */
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
30
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
31 #include <sys/types.h>
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
32 #include <errno.h>
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
33 #include <ctype.h>
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
34 #include <limits.h>
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
35 #include <string.h>
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
36 #include <stdlib.h>
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
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37
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
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38 #include "pws-compat.h"
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
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39 #include "vis.h"
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
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40
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
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41 #define isoctal(c) (((u_char)(c)) >= '0' && ((u_char)(c)) <= '7')
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
42 #define isvisible(c,flag) \
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
43 (((c) == '\\' || (flag & VIS_ALL) == 0) && \
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
44 (((u_int)(c) <= UCHAR_MAX && isascii((u_char)(c)) && \
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
45 (((c) != '*' && (c) != '?' && (c) != '[' && (c) != '#') || \
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
46 (flag & VIS_GLOB) == 0) && isgraph((u_char)(c))) || \
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
47 ((flag & VIS_SP) == 0 && (c) == ' ') || \
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
48 ((flag & VIS_TAB) == 0 && (c) == '\t') || \
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
49 ((flag & VIS_NL) == 0 && (c) == '\n') || \
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
50 ((flag & VIS_SAFE) && ((c) == '\b' || \
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
51 (c) == '\007' || (c) == '\r' || \
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
52 isgraph((u_char)(c))))))
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
53
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
54 typedef unsigned int u_int;
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
55 typedef unsigned char u_char;
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
56
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
57 /*
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
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58 * vis - visually encode characters
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
59 */
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
60 char *
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
61 vis(char *dst, int c, int flag, int nextc)
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
62 {
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
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63 if (isvisible(c, flag)) {
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
64 if ((c == '"' && (flag & VIS_DQ) != 0) ||
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
65 (c == '\\' && (flag & VIS_NOSLASH) == 0))
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
66 *dst++ = '\\';
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
67 *dst++ = c;
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
68 *dst = '\0';
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
69 return (dst);
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
70 }
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
71
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
72 if (flag & VIS_CSTYLE) {
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
73 switch(c) {
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
74 case '\n':
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
75 *dst++ = '\\';
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
76 *dst++ = 'n';
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
77 goto done;
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
78 case '\r':
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
79 *dst++ = '\\';
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
80 *dst++ = 'r';
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
81 goto done;
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
82 case '\b':
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
83 *dst++ = '\\';
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
84 *dst++ = 'b';
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
85 goto done;
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
86 case '\a':
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
87 *dst++ = '\\';
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
88 *dst++ = 'a';
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
89 goto done;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
90 case '\v':
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
91 *dst++ = '\\';
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
92 *dst++ = 'v';
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
93 goto done;
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
94 case '\t':
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
95 *dst++ = '\\';
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
96 *dst++ = 't';
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
97 goto done;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
98 case '\f':
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
99 *dst++ = '\\';
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
100 *dst++ = 'f';
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
101 goto done;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
102 case ' ':
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
103 *dst++ = '\\';
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
104 *dst++ = 's';
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
105 goto done;
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
106 case '\0':
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
107 *dst++ = '\\';
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
108 *dst++ = '0';
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
109 if (isoctal(nextc)) {
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
110 *dst++ = '0';
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
111 *dst++ = '0';
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
112 }
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
113 goto done;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
114 }
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
115 }
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
116 if (((c & 0177) == ' ') || (flag & VIS_OCTAL) ||
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
117 ((flag & VIS_GLOB) && (c == '*' || c == '?' || c == '[' || c == '#'))) {
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
118 *dst++ = '\\';
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
119 *dst++ = ((u_char)c >> 6 & 07) + '0';
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
120 *dst++ = ((u_char)c >> 3 & 07) + '0';
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
121 *dst++ = ((u_char)c & 07) + '0';
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
122 goto done;
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
123 }
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
124 if ((flag & VIS_NOSLASH) == 0)
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
125 *dst++ = '\\';
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
126 if (c & 0200) {
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
127 c &= 0177;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
128 *dst++ = 'M';
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
129 }
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
130 if (iscntrl((u_char)c)) {
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
131 *dst++ = '^';
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
132 if (c == 0177)
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
133 *dst++ = '?';
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
134 else
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
135 *dst++ = c + '@';
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
136 } else {
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
137 *dst++ = '-';
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
138 *dst++ = c;
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
139 }
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
140 done:
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
141 *dst = '\0';
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
142 return (dst);
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
143 }
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
144
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
145 /*
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
146 * strvis, strnvis, strvisx - visually encode characters from src into dst
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
147 *
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
148 * Dst must be 4 times the size of src to account for possible
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
149 * expansion. The length of dst, not including the trailing NULL,
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
150 * is returned.
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
151 *
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
152 * Strnvis will write no more than siz-1 bytes (and will NULL terminate).
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
153 * The number of bytes needed to fully encode the string is returned.
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
154 *
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
155 * Strvisx encodes exactly len bytes from src into dst.
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
156 * This is useful for encoding a block of data.
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
157 */
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
158 int
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
159 strvis(char *dst, const char *src, int flag)
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
160 {
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
161 char c;
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
162 char *start;
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
163
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
164 for (start = dst; (c = *src);)
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
165 dst = vis(dst, c, flag, *++src);
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
166 *dst = '\0';
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
167 return (dst - start);
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
168 }
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
169
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
170 int
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
171 strnvis(char *dst, const char *src, size_t siz, int flag)
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
172 {
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
173 char *start, *end;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
174 char tbuf[5];
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
175 int c, i;
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
176
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
177 i = 0;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
178 for (start = dst, end = start + siz - 1; (c = *src) && dst < end; ) {
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
179 if (isvisible(c, flag)) {
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
180 if ((c == '"' && (flag & VIS_DQ) != 0) ||
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
181 (c == '\\' && (flag & VIS_NOSLASH) == 0)) {
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
182 /* need space for the extra '\\' */
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
183 if (dst + 1 >= end) {
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
184 i = 2;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
185 break;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
186 }
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
187 *dst++ = '\\';
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
188 }
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
189 i = 1;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
190 *dst++ = c;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
191 src++;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
192 } else {
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
193 i = vis(tbuf, c, flag, *++src) - tbuf;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
194 if (dst + i <= end) {
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
195 memcpy(dst, tbuf, i);
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
196 dst += i;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
197 } else {
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
198 src--;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
199 break;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
200 }
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
201 }
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
202 }
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
203 if (siz > 0)
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
204 *dst = '\0';
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
205 if (dst + i > end) {
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
206 /* adjust return value for truncation */
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
207 while ((c = *src))
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
208 dst += vis(tbuf, c, flag, *++src) - tbuf;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
209 }
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
210 return (dst - start);
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
211 }
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
212
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
213 int
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
214 stravis(char **outp, const char *src, int flag)
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
215 {
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
216 char *buf;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
217 int len, serrno;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
218
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
219 buf = malloc(4 * strlen(src) + 1);
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
220 if (buf == NULL)
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
221 return -1;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
222 len = strvis(buf, src, flag);
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
223 serrno = errno;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
224 *outp = realloc(buf, len + 1);
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
225 if (*outp == NULL) {
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
226 *outp = buf;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
227 errno = serrno;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
228 }
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
229 return (len);
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
230 }
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
231
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
232 int
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
233 strvisx(char *dst, const char *src, size_t len, int flag)
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
234 {
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
235 char c;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
236 char *start;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
237
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
238 for (start = dst; len > 1; len--) {
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
239 c = *src;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
240 dst = vis(dst, c, flag, *++src);
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
241 }
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
242 if (len)
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
243 dst = vis(dst, *src, flag, '\0');
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
244 *dst = '\0';
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
245 return (dst - start);
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
246 }