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annotate compat/unvis.c @ 13:2bb1bbac1d0a default tip

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Added tag version-1.0.0 for changeset 1926dfc9feb0
author Guido Berhoerster <guido+libpws@berhoerster.name>
date Sun, 04 Aug 2019 21:37:56 +0200
parents 97097b4b6bfb
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
rev   line source
2
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
1 /* $OpenBSD: unvis.c,v 1.17 2015/09/13 11:32:51 guenther Exp $ */
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Guido Berhoerster <guido+libpws@berhoerster.name>
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2 /*-
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Guido Berhoerster <guido+libpws@berhoerster.name>
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3 * Copyright (c) 1989, 1993
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4 * The Regents of the University of California. All rights reserved.
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5 *
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6 * Redistribution and use in source and binary forms, with or without
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Guido Berhoerster <guido+libpws@berhoerster.name>
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7 * modification, are permitted provided that the following conditions
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Guido Berhoerster <guido+libpws@berhoerster.name>
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8 * are met:
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9 * 1. Redistributions of source code must retain the above copyright
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Guido Berhoerster <guido+libpws@berhoerster.name>
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10 * notice, this list of conditions and the following disclaimer.
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Guido Berhoerster <guido+libpws@berhoerster.name>
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11 * 2. Redistributions in binary form must reproduce the above copyright
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12 * notice, this list of conditions and the following disclaimer in the
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Guido Berhoerster <guido+libpws@berhoerster.name>
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13 * documentation and/or other materials provided with the distribution.
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Guido Berhoerster <guido+libpws@berhoerster.name>
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14 * 3. Neither the name of the University nor the names of its contributors
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Guido Berhoerster <guido+libpws@berhoerster.name>
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15 * may be used to endorse or promote products derived from this software
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Guido Berhoerster <guido+libpws@berhoerster.name>
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16 * without specific prior written permission.
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Guido Berhoerster <guido+libpws@berhoerster.name>
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17 *
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18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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Guido Berhoerster <guido+libpws@berhoerster.name>
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19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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Guido Berhoerster <guido+libpws@berhoerster.name>
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26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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28 * SUCH DAMAGE.
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29 */
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30
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31 #include <sys/types.h>
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32 #include <ctype.h>
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33
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34 #include "pws-compat.h"
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35 #include "vis.h"
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36
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37 /*
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38 * decode driven by state machine
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39 */
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40 #define S_GROUND 0 /* haven't seen escape char */
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41 #define S_START 1 /* start decoding special sequence */
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42 #define S_META 2 /* metachar started (M) */
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43 #define S_META1 3 /* metachar more, regular char (-) */
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44 #define S_CTRL 4 /* control char started (^) */
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45 #define S_OCTAL2 5 /* octal digit 2 */
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46 #define S_OCTAL3 6 /* octal digit 3 */
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47
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48 #define isoctal(c) (((u_char)(c)) >= '0' && ((u_char)(c)) <= '7')
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49
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50 typedef unsigned int u_int;
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51 typedef unsigned char u_char;
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52
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53 /*
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54 * unvis - decode characters previously encoded by vis
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55 */
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56 int
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57 unvis(char *cp, char c, int *astate, int flag)
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58 {
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59
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60 if (flag & UNVIS_END) {
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61 if (*astate == S_OCTAL2 || *astate == S_OCTAL3) {
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62 *astate = S_GROUND;
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63 return (UNVIS_VALID);
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64 }
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65 return (*astate == S_GROUND ? UNVIS_NOCHAR : UNVIS_SYNBAD);
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66 }
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67
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68 switch (*astate) {
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69
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70 case S_GROUND:
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71 *cp = 0;
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72 if (c == '\\') {
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73 *astate = S_START;
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74 return (0);
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75 }
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76 *cp = c;
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77 return (UNVIS_VALID);
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78
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79 case S_START:
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80 switch(c) {
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81 case '-':
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82 *cp = 0;
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83 *astate = S_GROUND;
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84 return (0);
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85 case '\\':
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86 case '"':
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87 *cp = c;
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88 *astate = S_GROUND;
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89 return (UNVIS_VALID);
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90 case '0': case '1': case '2': case '3':
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91 case '4': case '5': case '6': case '7':
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92 *cp = (c - '0');
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93 *astate = S_OCTAL2;
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94 return (0);
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95 case 'M':
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96 *cp = (char) 0200;
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97 *astate = S_META;
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98 return (0);
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99 case '^':
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100 *astate = S_CTRL;
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101 return (0);
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102 case 'n':
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103 *cp = '\n';
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104 *astate = S_GROUND;
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105 return (UNVIS_VALID);
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106 case 'r':
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107 *cp = '\r';
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108 *astate = S_GROUND;
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109 return (UNVIS_VALID);
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110 case 'b':
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111 *cp = '\b';
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112 *astate = S_GROUND;
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113 return (UNVIS_VALID);
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114 case 'a':
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115 *cp = '\007';
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116 *astate = S_GROUND;
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117 return (UNVIS_VALID);
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118 case 'v':
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119 *cp = '\v';
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120 *astate = S_GROUND;
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121 return (UNVIS_VALID);
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122 case 't':
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123 *cp = '\t';
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124 *astate = S_GROUND;
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125 return (UNVIS_VALID);
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126 case 'f':
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127 *cp = '\f';
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128 *astate = S_GROUND;
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129 return (UNVIS_VALID);
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130 case 's':
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131 *cp = ' ';
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132 *astate = S_GROUND;
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133 return (UNVIS_VALID);
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134 case 'E':
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135 *cp = '\033';
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136 *astate = S_GROUND;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
137 return (UNVIS_VALID);
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
138 case '\n':
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
139 /*
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
140 * hidden newline
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
141 */
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
142 *astate = S_GROUND;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
143 return (UNVIS_NOCHAR);
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
144 case '$':
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
145 /*
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
146 * hidden marker
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
147 */
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
148 *astate = S_GROUND;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
149 return (UNVIS_NOCHAR);
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
150 }
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
151 *astate = S_GROUND;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
152 return (UNVIS_SYNBAD);
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
153
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
154 case S_META:
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
155 if (c == '-')
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
156 *astate = S_META1;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
157 else if (c == '^')
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
158 *astate = S_CTRL;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
159 else {
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
160 *astate = S_GROUND;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
161 return (UNVIS_SYNBAD);
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
162 }
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
163 return (0);
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
164
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
165 case S_META1:
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
166 *astate = S_GROUND;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
167 *cp |= c;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
168 return (UNVIS_VALID);
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
169
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
170 case S_CTRL:
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
171 if (c == '?')
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
172 *cp |= 0177;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
173 else
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
174 *cp |= c & 037;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
175 *astate = S_GROUND;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
176 return (UNVIS_VALID);
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
177
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
178 case S_OCTAL2: /* second possible octal digit */
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
179 if (isoctal(c)) {
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
180 /*
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
181 * yes - and maybe a third
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
182 */
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
183 *cp = (*cp << 3) + (c - '0');
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
184 *astate = S_OCTAL3;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
185 return (0);
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 /*
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
188 * no - done with current sequence, push back passed char
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
189 */
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
190 *astate = S_GROUND;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
191 return (UNVIS_VALIDPUSH);
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
192
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
193 case S_OCTAL3: /* third possible octal digit */
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
194 *astate = S_GROUND;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
195 if (isoctal(c)) {
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
196 *cp = (*cp << 3) + (c - '0');
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
197 return (UNVIS_VALID);
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
198 }
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
199 /*
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
200 * we were done, push back passed char
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 return (UNVIS_VALIDPUSH);
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
203
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
204 default:
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
205 /*
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
206 * decoder in unknown state - (probably uninitialized)
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
207 */
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
208 *astate = S_GROUND;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
209 return (UNVIS_SYNBAD);
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
210 }
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 /*
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
214 * strunvis - decode src into dst
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 * Number of chars decoded into dst is returned, -1 on error.
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
217 * Dst is null terminated.
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
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
220 int
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
221 strunvis(char *dst, const char *src)
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
222 {
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
223 char c;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
224 char *start = dst;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
225 int state = 0;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
226
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
227 while ((c = *src++)) {
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
228 again:
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
229 switch (unvis(dst, c, &state, 0)) {
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
230 case UNVIS_VALID:
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
231 dst++;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
232 break;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
233 case UNVIS_VALIDPUSH:
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
234 dst++;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
235 goto again;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
236 case 0:
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
237 case UNVIS_NOCHAR:
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
238 break;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
239 default:
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
240 *dst = '\0';
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
241 return (-1);
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
242 }
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
243 }
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
244 if (unvis(dst, c, &state, UNVIS_END) == UNVIS_VALID)
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
245 dst++;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
246 *dst = '\0';
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
247 return (dst - start);
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
248 }
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
249
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
250 ssize_t
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
251 strnunvis(char *dst, const char *src, size_t sz)
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
252 {
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
253 char c, p;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
254 char *start = dst, *end = dst + sz - 1;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
255 int state = 0;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
256
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
257 if (sz > 0)
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
258 *end = '\0';
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
259 while ((c = *src++)) {
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
260 again:
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
261 switch (unvis(&p, c, &state, 0)) {
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
262 case UNVIS_VALID:
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
263 if (dst < end)
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
264 *dst = p;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
265 dst++;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
266 break;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
267 case UNVIS_VALIDPUSH:
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
268 if (dst < end)
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
269 *dst = p;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
270 dst++;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
271 goto again;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
272 case 0:
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
273 case UNVIS_NOCHAR:
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
274 break;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
275 default:
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
276 if (dst <= end)
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
277 *dst = '\0';
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
278 return (-1);
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
279 }
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
280 }
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
281 if (unvis(&p, c, &state, UNVIS_END) == UNVIS_VALID) {
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
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282 if (dst < end)
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
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283 *dst = p;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
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284 dst++;
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
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285 }
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
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286 if (dst <= end)
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Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
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287 *dst = '\0';
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
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288 return (dst - start);
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
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289 }
97097b4b6bfb Add pwsdump utility
Guido Berhoerster <guido+libpws@berhoerster.name>
parents:
diff changeset
290