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<TITLE>Redet Reference Manual: Programs Available</TITLE>
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<H2><a name="available">Programs Available</a></H2>
<h3>List</h3>
<P>
The programs currently supported are:
</p>
<center>
<table cellspacing="0" cellpadding="5" border="0">
<tbody><tr><td><ul type="none">
<li><a href="http://laurikari.net/tre">agrep (TRE)</a></li>
<li><a href="ftp://ftp.cs.arizona.edu/agrep">agrep (Wu-Manber)</a></li>
<li><a href="http://www.minimalinux.org/arena/index.html">arena</a></li>
<li><a href="http://cm.bell-labs.com/cm/cs/awkbook/">awk</a></li>
<li><a href="http://www.gnu.org/software/bash/bash.html">bash</a></li>
<li><a href="http://www.busybox.net">BusyBox egrep</a></li>
<li><a href="http://www.gnu.org/software/libc/manual/html_node/Regular-Expressions.html#Regular-Expressions">C-POSIX</a></li>
<li><a href="http://freshmeat.net/projects/cgrep">cgrep</a></li>
<li><a href="http://www.gnu.org/software/ed/ed.html">ed</a></li>
<li><a href="http://www.gnu.org/software/grep/">egrep</a></li>
<li><a href="http://www.gnu.org/software/emacs/emacs.html">emacs</a></li>
<li><a href="http://www.rapideuphoria.com/">euphoria</a></li>
<li><a href="http://www.gnu.org/software/coreutils/manual/html_mono/coreutils.html#Conditions">expr</a></li>
<li><a href="http://www.gnu.org/software/grep/">fgrep</a></li>
<li><a href="http://roo.no-ip.org/fish/">fish</a></li>
<li><a href="http://futureboy.homeip.net/frinkdocs/">frink</a></li>
<li><a href="http://www.gnu.org/software/gawk/">gawk</a></li>
<li><a href="http://www.incava.org/projects/glark/">glark</a></li>
<li><a href="http://www.gnu.org/software/grep/">grep</a></li>
</ul>
</td>
<td>
<ul type="none">
<li><a href="http://groovy.codehaus.org">groovy</a></li>
<li><a href="http://www.gnu.org/software/guile/">guile</a></li>
<li><a href="http://ici.sourceforge.net">ici</a></li>
<li><a href="http://www.cs.arizona.edu/icon/">icon</a></li>
<li><a href="http://java.sun.com/">java</a></li>
<li><a href="http://www.njs-javascript.org/">javascript</a></li>
<li><a href="http://ourworld.compuserve.com/homepages/John_Maddock/regexpp.htm">jgrep</a></li>
<li><a href="http://www.judoscript.com/judo.html">judoscript</a></li>
<li><a href="http://www.kornshell.com">ksh</a></li>
<li><a href="http://www.lua.org/">lua</a></li>
<li><a href="http://www.gnu.org/software/m4">m4</a></li>
<li><a href="http://freshmeat.net/projects/mawk/">mawk</a></li>
<li><a href="http://www.exactcode.de/oss/minised/">minised</a></li>
<li><a href="http://www.mysql.com">mysql</a></li>
<li><a href="http://heirloom.sourceforge.net/">nawk</a></li>
<li><a href="http://www.dcc.uchile.cl/~gnavarro/software/">nrgrep</a></li>
<li><a href="http://suso.suso.org/programs/num-utils/">numrep</a></li>
<li><a href="http://nar.oxfordjournals.org/cgi/content/abstract/33/suppl_2/W262">patmatch</a></li>
<li><a href="http://www.pcre.org/">pcregrep</a></li>
</ul>
</td>
<td><ul type="none">
<li><a href="http://www.perl.org/">perl</a></li>
<li><a href="http://www.php.net/">php-mb</a></li>
<li><a href="http://www.php.net/">php-pcre</a></li>
<li><a href="http://www.php.net/">php-posix</a></li>
<li><a href="http://pike.ida.liu.se/">pike</a></li>
<li><a href="http://www.python.org/">python</a></li>
<li><a href="http://www.star.le.ac.uk/~tjg/rc">rc</a></li>
<li><a href="http://www.rebol.com/">rebol</a></li>
<li><a href="http://librep.sourceforge.net">rep</a></li>
<li><a href="http://ruby-lang.org/">ruby</a></li>
<li><a href="http://www.gnu.org/software/sed">sed</a></li>
<li><a href="http://sleep.hick.org/">sleep</a></li>
<li><a href="http://sleep.hick.org/">sleepwc</a></li>
<li><a href="http://sed.sourceforge.net/grabbag/ssed/">ssed</a></li>
<li><a href="http://www.tcl.tk/">tcl</a></li>
<li><a href="http://www.tcl.tk/">tclglob</a></li>
<li><a href="http://www.tcsh.org/">tcsh</a></li>
<li><a href="http://www.gnu.org/software/coreutils/manual/html_chapter/coreutils_9.html#SEC44">tr</a></li>
<li><a href="http://www.zsh.org/">zsh</a></li>
</ul>
</td></tr>
</tbody>
</table>
</center>
<h3>Notes</h3>
<P>
Note: The link given above for <i>awk</i> is to the original AT&T version.
On many systems <i>awk</i> is an alias for <i>gawk</i> or <i>nawk</i>.
The link given for <i>nawk</i> is for the <i>Heirloom Toolchest</i> version.
This is actually better than the original AT&T version in that it supports
Unicode. Note also that the links for <i>grep</i>, <i>egrep</i>, and <i>fgrep</i>
are all to GNU <i>grep</i>. In the GNU implementation, there is only a single
program whose behavior emulates that of the AT&T programs when given
appropriate command line options. In the case of standard UNIX tools, there
may be many different versions. I have generally given a link to the GNU
version.
</p>
<P>
Support for Java is for Sun Java J2EE 1.4 SDK. The compiler must be called
<i>javac</i>, the byte-code interpreter <i>java</i>. Only recent versions
will work since it is only in recent releases that java.util.regex is provided.
Although the execution of Java for individual searches is reasonably fast,
because each execution of Java involves a fairly large overhead, feature
testing for Java is slow.
</p>
<P>
The version of <i>Javascript</i> with which <i>Redet</i> has been tested
is the standalone Javascript shell. This has some capabilities that versions
intended for CGI use do not, in particular, the ability to read and write
files. As far as I know, the regular expression matching facilities of
this version of Javascript are the same as for the CGI versions.
</P>
<P>
There are a number of variants of <i>sed</i>. Most versions, including GNU sed and BSD sed,
are always named sed. Minised installs by default as <i>minised</i> but on some systems is
the only version of sed and is named <i>sed</i>. Supersed is sometimes called <i>ssed</i>
and sometimes <i>sed</i>. Redet attempts to determine which version of sed is called <i>sed</i>
and to behave appropriately. This determination may not be foolproof since some seds
do not identify themselves unequivocally.
</p>
<P>
The <i>Tcl</i> language has two regular expression facilities. One is a general-purpose
string matching facility, denoted above as <i>tcl</i>. The other is a file-globbing
facility, denoted above as <i>tclglob</i>.
</P>
<P>
For programs like <u>grep</u> whose very purpose is the matching of
patterns, it is obvious what it means to use that program to execute
a regular expression. In the case of editors such as <u>sed</u>,
execution of a regular expression consists of using it to match
input lines. In the case of programming languages such as
<u>python</u>, regular expressions are given as arguments
to the regular expression matching function provided by the
language. In the case of shells, executing a regular expression
means using that regular expression as a file globbing pattern.
</P>
<P>
The original and builtin regular expression facility of <i>PHP</i> provides POSIX
regular expressions for ASCII using functions with names like <i>ereg</i>.
This is denoted <i>php-posix</i>.
Two extensions provide alternative facilities. These are not always available. One, denoted
<i>php-mb</i>, allows for multibyte character sets, such as Unicode.
The other, denoted <i>php-pcre</i>, provides PERL-style regular expressions.
</p>
<P>
The language <u>tcl</u> provides both regular expression matching on strings
and file name globbing, with distinct regular expression syntax, so
both are provided for. If the program selected is <u>tcl</u>, regular
expression matching on strings is performed. If the program selected
is <u>tclglob</u>, file name globbing is performed.
</P>
<P>
<i>Rebol</i> is only partially supported because its pattern matching system
is not a typical regular expression matching system. Some aspects of its pattern
matching system are procedural. In order to make full use of Rebol pattern
matching, one must write procedural programs; much of the system lies outside
of a declarative system like that used for regular expressions. The declarative
part of the system is the <i>parse</i> function. Only this part is supported by
<i>Redet</i>.
</p>
<P>
Another limitation concerns character classes. <i>Rebol</i> provides a system for defining
character classes comparable to that commonly used for regular expressions. Unfortunately,
in Rebol character classes may only be defined outside of the <i>parse</i> function.
It is therefore not possible to treat them like the character class definitions of regular
expressions. For the present, at least, <i>Redet</i> does not support user-defined
character classes in Rebol. However, to make things a bit easier, several character
classes have been predefined. These are:
</P>
<DL>
<dt>lower</dt>
<DD>ASCII lower case letters</DD>
<DT>upper</DT>
<DD>ASCII upper case letters.</DD>
<DT>alpha</DT>
<DD>ASCII letters</DD>
<DT>digit</DT>
<DD>The decimal digits</DD>
<DT>alphanum</DT>
<DD>The union of the ASCII letters and decimal digits</DD>
<DT>xdigit</DT>
<DD>The hexadecimal digits</DD>
</DL>
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