Mercurial > cgi-bin > hgweb.cgi > PassMan

annotate src/main/kotlin/name/blackcap/passman/See.kt @ 4:02b101422726

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See bugs.
author David Barts <n5jrn@me.com>
date Sun, 11 Sep 2022 20:44:59 -0700
parents eafa3779aef8
children ad997df1f560
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1 package name.blackcap.passman
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3 /* Would be nice if there was a more programmatic and comprehensive way of
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4 doing this, but alas. Even the oft-recommended StringEscapeUtils does
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5 something cruder than the below. Le sigh. */
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7 import java.util.Formatter
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9 private const val DELIM = '"'
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10 private const val SHY = '\u00ad'
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12 private val STD_ESC_MAP = mapOf<Char, Char>('\t' to 't', '\b' to 'b', '\n' to 'n',
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13 '\r' to 'r', '\u000c' to 'f', '"' to '"', '\\' to '\\')
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14 private val BANNED = setOf<Char>(DELIM, SHY, '\\')
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15 private const val MIN_ASCII = ' '
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16 private const val MAX_ASCII = '~'
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17 private const val MIN_8859 = '\u00a1'
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18 private const val MAX_8859 = '\u00ff'
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20 fun see(input: String, simple: Boolean = false): String =
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21 if (simple) seeSimple(input) else seeAggressive(input)
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23 private fun seeSimple(input: String): String = StringBuilder().run {
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24 append(DELIM)
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25 append(input)
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26 append(DELIM)
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27 toString()
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28 }
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30 private fun seeAggressive(input: String): String {
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31 val accum = Formatter()
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32 accum.format("%c", DELIM)
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33 for (ch in input) {
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34 if ((ch !in BANNED) && ((ch in MIN_ASCII..MAX_ASCII) || (ch in MIN_8859 .. MAX_8859))) {
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35 accum.format("%c", ch)
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36 continue
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37 }
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38 val mapped = STD_ESC_MAP[ch]
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39 if (mapped != null) {
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40 accum.format("\\%c", mapped)
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41 } else {
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42 accum.format("\\u%04x", ch.code)
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43 }
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44 }
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45 accum.format("%c", DELIM)
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46 return accum.toString()
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47 }