Commit df24da7f authored by Pietro Abate's avatar Pietro Abate
Browse files

[r2004-06-28 13:57:31 by afrisch] Bug in utf8 decoding

Original author: afrisch
Date: 2004-06-28 13:57:31+00:00
parent 6c8718d4
......@@ -80,17 +80,17 @@ struct
| '\000'..'\127' as c ->
Char.code c
| '\192'..'\223' as c ->
((Char.code c - 192) lsl 6) lor
((Char.code s.[i+1] - 128))
((Char.code c land 0b11111) lsl 6) lor
((Char.code s.[i+1] land 0b111111))
| '\224'..'\239' as c ->
((Char.code c - 192) lsl 12) lor
((Char.code s.[i+1] - 128) lsl 6) lor
((Char.code s.[i+2] - 128))
((Char.code c land 0b11111) lsl 12) lor
((Char.code s.[i+1] land 0b111111) lsl 6) lor
((Char.code s.[i+2] land 0b111111))
| '\240'..'\248' as c ->
((Char.code c - 192) lsl 18) lor
((Char.code s.[i+1] - 128) lsl 12) lor
((Char.code s.[i+2] - 128) lsl 6) lor
((Char.code s.[i+3] - 128))
((Char.code c land 0b11111) lsl 18) lor
((Char.code s.[i+1] land 0b111111) lsl 12) lor
((Char.code s.[i+2] land 0b111111) lsl 6) lor
((Char.code s.[i+3] land 0b111111))
| _ -> failwith "Malformed UTF-8 bufffer"
let next s i =
......
<?xml version="1.0" encoding="ISO-8859-1" standalone="yes"?>
<!DOCTYPE page [
<!ENTITY rarr "&#8594;"> <!-- rightwards arrow, U+2192 ISOnum -->
]>
<page name="manual_interfacewithocaml">
<title>Interfacing CDuce with OCaml</title>
......@@ -6,20 +9,44 @@
<box title="Introduction" link="intro">
<p>
When you have to write a large program you often need to manage some
persistent data. An elegant and widespread technique to fulfill
this goal, is to use XML based documents. And a safe and robust
way to treat XML files is to write a small program in CDuce.
This page describe the CDuce/OCaml interface. This interface allows
the programmer to:
</p>
<ul>
<li>call OCaml functions from a CDuce module;</li>
<li>export a CDuce as an OCaml module, by giving it an explicit OCaml signature.</li>
</ul>
<p>
The intended usages for the interface are:
</p>
<ul>
<li>Piggyback existing OCaml libraries, such as database,
network, GUI, datastructures;</li>
<li>Use CDuce as an XML layer (input/output/transformation) for OCaml
projects;</li>
<li>Develop fully mixed OCaml/CDuce projects.</li>
</ul>
<p>
This page explains how to call CDuce functions from OCaml to couple. It is very
simple all you need to do is to write an OCaml interface file for the CDuce
functions you want to export to OCaml. This requires that CDuce was compiled
with support for OCaml interface (<code>ML_INTERFACE=true</code>).
To see how to build CDuce with support for the OCaml interface,
see the INSTALL file from the CDuce distribution.
</p>
</box>
<box title="Translating types" link="transl">
<p>
The heart of the interface is a mapping from OCaml types to CDuce
types. An OCaml type <code>t</code> is translated to a CDuce type
<code>T(t)</code>, which is meant to be &rarr; isomorphic to <code>t</code>:
there exist a canonical function <code>t &rarr; T(t)</code>
from OCaml values of type <code>t</code> to CDuce values of type
<code>T(t)</code>, and another canonical function <code>T(t) &rarr; t</code>.
</p>
</box>
<box title="The interface file" link="interface">
......
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