Convert text to html codes

I was surprised there was no simple script out here to do this conversion. I took the an table of html ascii and wrote this bash script.

I know there are functions to convert text to ascii. I didn't want to go through the hassle of formatting it for HTML.

This script accepts as input the text you want to convert and also a html formatted table of ascii codes.

#!/bin/sh
# $1 input text
# $2 ascii table



to_process=$1
res=""
for ((i=0;i<${#to_process};i++))
{
 letter=${to_process:i:1}

 if [[ $letter == "." ]]
 then
  res="${res} &#46;"
 else
  line_no=`grep -n "<td>$letter</td>" $2 | cut -f 1 -d ':'`
  ((line_no++))

  if [[ ${#line_no} -gt 0 ]]
  then

   part=`sed -n "${line_no}p" $2 | sed -e 's/<td>//' -e  's/<\/td>//'`
   res=${res}${part}

  fi

 fi
}
echo $res | sed -e 's/amp\;//g' -e 's/ //g' 

Here is the table I used:

<table cellspacing="0" border="1" width="100%" class="reference">
    <tbody><tr>
      <th align="left">ASCII Character</th>
      <th align="left">HTML Entity Code</th>
      <th align="left">Description</th>
    </tr>
    <tr>
      <td> </td>
      <td>&#32;</td>
      <td>space</td>
    </tr>
    <tr>
      <td>!</td>
      <td>&#33;</td>
      <td>exclamation mark</td>
    </tr>
    <tr>
      <td>"</td>
      <td>&#34;</td>
      <td>quotation mark</td>
    </tr>
    <tr>
      <td>#</td>
      <td>&#35;</td>
      <td>number sign</td>
    </tr>
    <tr>
      <td>$</td>
      <td>&#36;</td>
      <td>dollar sign</td>
    </tr>
    <tr>
      <td>%</td>
      <td>&#37;</td>
      <td>percent sign</td>
    </tr>
    <tr>
      <td>&</td>
      <td>&#38;</td>
      <td>ampersand</td>
    </tr>
    <tr>
      <td>'</td>
      <td>&#39;</td>
      <td>apostrophe</td>
    </tr>
    <tr>
      <td>(</td>
      <td>&#40;</td>
      <td>left parenthesis</td>
    </tr>
    <tr>
      <td>)</td>
      <td>&#41;</td>
      <td>right parenthesis</td>
    </tr>
    <tr>
      <td>*</td>
      <td>&#42;</td>
      <td>asterisk</td>
    </tr>
    <tr>
      <td>+</td>
      <td>&#43;</td>
      <td>plus sign</td>
    </tr>
    <tr>
      <td>,</td>
      <td>&#44;</td>
      <td>comma</td>
    </tr>
    <tr>
      <td>-</td>
      <td>&#45;</td>
      <td>hyphen</td>
    </tr>
    <tr>
      <td>.</td>
      <td>&#46;</td>
      <td>period</td>
    </tr>
    <tr>
      <td>/</td>
      <td>&#47;</td>
      <td>slash</td>
    </tr>
    <tr>
      <td>0</td>
      <td>&#48;</td>
      <td>digit 0</td>
    </tr>
    <tr>
      <td>1</td>
      <td>&#49;</td>
      <td>digit 1</td>
    </tr>
    <tr>
      <td>2</td>
      <td>&#50;</td>
      <td>digit 2</td>
    </tr>
    <tr>
      <td>3</td>
      <td>&#51;</td>
      <td>digit 3</td>
    </tr>
    <tr>
      <td>4</td>
      <td>&#52;</td>
      <td>digit 4</td>
    </tr>
    <tr>
      <td>5</td>
      <td>&#53;</td>
      <td>digit 5</td>
    </tr>
    <tr>
      <td>6</td>
      <td>&#54;</td>
      <td>digit 6</td>
    </tr>
    <tr>
      <td>7</td>
      <td>&#55;</td>
      <td>digit 7</td>
    </tr>
    <tr>
      <td>8</td>
      <td>&#56;</td>
      <td>digit 8</td>
    </tr>
    <tr>
      <td>9</td>
      <td>&#57;</td>
      <td>digit 9</td>
    </tr>
    <tr>
      <td>:</td>
      <td>&#58;</td>
      <td>colon</td>
    </tr>
    <tr>
      <td>;</td>
      <td>&#59;</td>
      <td>semicolon</td>
    </tr>
    <tr>
      <td><</td>
      <td>&#60;</td>
      <td>less-than</td>
    </tr>
    <tr>
      <td>=</td>
      <td>&#61;</td>
      <td>equals-to</td>
    </tr>
    <tr>
      <td>></td>
      <td>&#62;</td>
      <td>greater-than</td>
    </tr>
    <tr>
      <td>?</td>
      <td>&#63;</td>
      <td>question mark</td>
    </tr>
    <tr>
      <td>@</td>
      <td>&#64;</td>
      <td>at sign</td>
    </tr>
    <tr>
      <td>A</td>
      <td>&#65;</td>
      <td>uppercase A</td>
    </tr>
    <tr>
      <td>B</td>
      <td>&#66;</td>
      <td>uppercase B</td>
    </tr>
    <tr>
      <td>C</td>
      <td>&#67;</td>
      <td>uppercase C</td>
    </tr>
    <tr>
      <td>D</td>
      <td>&#68;</td>
      <td>uppercase D</td>
    </tr>
    <tr>
      <td>E</td>
      <td>&#69;</td>
      <td>uppercase E</td>
    </tr>
    <tr>
      <td>F</td>
      <td>&#70;</td>
      <td>uppercase F</td>
    </tr>
    <tr>
      <td>G</td>
      <td>&#71;</td>
      <td>uppercase G</td>
    </tr>
    <tr>
      <td>H</td>
      <td>&#72;</td>
      <td>uppercase H</td>
    </tr>
    <tr>
      <td>I</td>
      <td>&#73;</td>
      <td>uppercase I</td>
    </tr>
    <tr>
      <td>J</td>
      <td>&#74;</td>
      <td>uppercase J</td>
    </tr>
    <tr>
      <td>K</td>
      <td>&#75;</td>
      <td>uppercase K</td>
    </tr>
    <tr>
      <td>L</td>
      <td>&#76;</td>
      <td>uppercase L</td>
    </tr>
    <tr>
      <td>M</td>
      <td>&#77;</td>
      <td>uppercase M</td>
    </tr>
    <tr>
      <td>N</td>
      <td>&#78;</td>
      <td>uppercase N</td>
    </tr>
    <tr>
      <td>O</td>
      <td>&#79;</td>
      <td>uppercase O</td>
    </tr>
    <tr>
      <td>P</td>
      <td>&#80;</td>
      <td>uppercase P</td>
    </tr>
    <tr>
      <td>Q</td>
      <td>&#81;</td>
      <td>uppercase Q</td>
    </tr>
    <tr>
      <td>R</td>
      <td>&#82;</td>
      <td>uppercase R</td>
    </tr>
    <tr>
      <td>S</td>
      <td>&#83;</td>
      <td>uppercase S</td>
    </tr>
    <tr>
      <td>T</td>
      <td>&#84;</td>
      <td>uppercase T</td>
    </tr>
    <tr>
      <td>U</td>
      <td>&#85;</td>
      <td>uppercase U</td>
    </tr>
    <tr>
      <td>V</td>
      <td>&#86;</td>
      <td>uppercase V</td>
    </tr>
    <tr>
      <td>W</td>
      <td>&#87;</td>
      <td>uppercase W</td>
    </tr>
    <tr>
      <td>X</td>
      <td>&#88;</td>
      <td>uppercase X</td>
    </tr>
    <tr>
      <td>Y</td>
      <td>&#89;</td>
      <td>uppercase Y</td>
    </tr>
    <tr>
      <td>Z</td>
      <td>&#90;</td>
      <td>uppercase Z</td>
    </tr>
    <tr>
      <td>[</td>
      <td>&#91;</td>
      <td>left square bracket</td>
    </tr>
    <tr>
      <td>\</td>
      <td>&#92;</td>
      <td>backslash</td>
    </tr>
    <tr>
      <td>]</td>
      <td>&#93;</td>
      <td>right square bracket</td>
    </tr>
    <tr>
      <td>^</td>
      <td>&#94;</td>
      <td>caret</td>
    </tr>
    <tr>
      <td>_</td>
      <td>&#95;</td>
      <td>underscore</td>
    </tr>
    <tr>
      <td>`</td>
      <td>&#96;</td>
      <td>grave accent</td>
    </tr>
    <tr>
      <td>a</td>
      <td>&#97;</td>
      <td>lowercase a</td>
    </tr>
    <tr>
      <td>b</td>
      <td>&#98;</td>
      <td>lowercase b</td>
    </tr>
    <tr>
      <td>c</td>
      <td>&#99;</td>
      <td>lowercase c</td>
    </tr>
    <tr>
      <td>d</td>
      <td>&#100;</td>
      <td>lowercase d</td>
    </tr>
    <tr>
      <td>e</td>
      <td>&#101;</td>
      <td>lowercase e</td>
    </tr>
    <tr>
      <td>f</td>
      <td>&#102;</td>
      <td>lowercase f</td>
    </tr>
    <tr>
      <td>g</td>
      <td>&#103;</td>
      <td>lowercase g</td>
    </tr>
    <tr>
      <td>h</td>
      <td>&#104;</td>
      <td>lowercase h</td>
    </tr>
    <tr>
      <td>i</td>
      <td>&#105;</td>
      <td>lowercase i</td>
    </tr>
    <tr>
      <td>j</td>
      <td>&#106;</td>
      <td>lowercase j</td>
    </tr>
    <tr>
      <td>k</td>
      <td>&#107;</td>
      <td>lowercase k</td>
    </tr>
    <tr>
      <td>l</td>
      <td>&#108;</td>
      <td>lowercase l</td>
    </tr>
    <tr>
      <td>m</td>
      <td>&#109;</td>
      <td>lowercase m</td>
    </tr>
    <tr>
      <td>n</td>
      <td>&#110;</td>
      <td>lowercase n</td>
    </tr>
    <tr>
      <td>o</td>
      <td>&#111;</td>
      <td>lowercase o</td>
    </tr>
    <tr>
      <td>p</td>
      <td>&#112;</td>
      <td>lowercase p</td>
    </tr>
    <tr>
      <td>q</td>
      <td>&#113;</td>
      <td>lowercase q</td>
    </tr>
    <tr>
      <td>r</td>
      <td>&#114;</td>
      <td>lowercase r</td>
    </tr>
    <tr>
      <td>s</td>
      <td>&#115;</td>
      <td>lowercase s</td>
    </tr>
    <tr>
      <td>t</td>
      <td>&#116;</td>
      <td>lowercase t</td>
    </tr>
    <tr>
      <td>u</td>
      <td>&#117;</td>
      <td>lowercase u</td>
    </tr>
    <tr>
      <td>v</td>
      <td>&#118;</td>
      <td>lowercase v</td>
    </tr>
    <tr>
      <td>w</td>
      <td>&#119;</td>
      <td>lowercase w</td>
    </tr>
    <tr>
      <td>x</td>
      <td>&#120;</td>
      <td>lowercase x</td>
    </tr>
    <tr>
      <td>y</td>
      <td>&#121;</td>
      <td>lowercase y</td>
    </tr>
    <tr>
      <td>z</td>
      <td>&#122;</td>
      <td>lowercase z</td>
    </tr>
    <tr>
      <td>{</td>
      <td>&#123;</td>
      <td>left curly brace</td>
    </tr>
    <tr>
      <td>|</td>
      <td>&#124;</td>
      <td>vertical bar</td>
    </tr>
    <tr>
      <td>}</td>
      <td>&#125;</td>
      <td>right curly brace</td>
    </tr>
    <tr>
      <td>~</td>
      <td>&#126;</td>
      <td>tilde</td>
    </tr>
</tbody></table>