<Chapter Label="ch:util">
<Heading>String and Text Utilities</Heading>


<Section Label="TextUtil">
<Heading>Text Utilities</Heading>

This  section describes  some utility  functions for  handling texts  within
&GAP;. They are used  by  the  functions in the &GAPDoc;  package but may be
useful for other  purposes as well. We start with  some variables containing
useful strings and  go on with functions for parsing  and reformatting text.
<P/>

<#Include Label="CharsColls">

<#Include Label="TextAttr">

<#Include Label="WrapTextAttribute">

<#Include Label="FormatParagraph">

<#Include Label="SubstitutionSublist">

<!-- moved into GAP library
<#Include Label="NormalizedWhitespace">
-->
<#Include Label="StripBeginEnd">

<#Include Label="StripEscapeSequences">

<#Include Label="RepeatedString">

<#Include Label="NumberDigits">

<#Include Label="PositionMatchingDelimiter">

<#Include Label="WordsString">

<#Include Label="Base64String">

</Section>

<Section Label="sec:Unicode">
<Heading>Unicode Strings</Heading>
The &GAPDoc; package provides some tools to deal with unicode characters
and strings. These can be used for recoding text strings between various
encodings.

<#Include Label="Unicode">

<#Include Label="Encode">

<#Include Label="WidthUTF8String">

</Section>

<Section Label="PrintUtil">
<Heading>Print Utilities</Heading>

The following  printing utilities  turned out to  be useful  for interactive
work with texts in &GAP;. But they  are more general and so we document them
here.

<#Include Label="PrintTo1">

<#Include Label="StringPrint">

<#Include Label="PrintFormattedString">

<#Include Label="Page">

<#Include Label="StringFile">

</Section>
</Chapter>