--- /dev/null
+<?xml version='1.0' ?> <!-- Mode: Docbook -->
+<!DOCTYPE book PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
+ "file:///usr/share/sgml/docbook/dtd/xml/4.2/docbookx.dtd" [
+<!ENTITY % myents SYSTEM "entities.xml">
+%myents;
+]>
+
+<reference id="primitives">
+ <title>Primitive Types</title>
+ <partintro>
+ <title>Overview</title>
+ <para>
+ Primitive types have a single value, these include
+ characters, numbers, and pointers. They are all symbols in
+ the keyword package.
+ </para>
+ <itemizedlist>
+ <listitem>
+ <para><constant>:char</constant> - Signed 8-bits. A
+dereferenced :char pointer returns an character.</para>
+ </listitem>
+ <listitem>
+ <para><constant>:unsigned-char</constant> - Unsigned 8-bits. A dereferenced :unsigned-char
+pointer returns an character.</para>
+ </listitem>
+ <listitem>
+ <para><constant>:byte</constant> - Signed 8-bits. A
+dereferenced :byte pointer returns an integer.</para>
+ </listitem>
+ <listitem>
+ <para><constant>:unsigned-byte</constant> - Unsigned 8-bits. A
+dereferenced :unsigned-byte pointer returns an integer.</para>
+ </listitem>
+ <listitem>
+ <para><constant>:short</constant> - Signed 16-bits.</para>
+ </listitem>
+ <listitem>
+ <para><constant>:unsigned-short</constant> - Unsigned 16-bits.</para>
+ </listitem>
+ <listitem>
+ <para><constant>:int</constant> - Signed 32-bits.</para>
+ </listitem>
+ <listitem>
+ <para><constant>:unsigned-int</constant> - Unsigned 32-bits.</para>
+ </listitem>
+ <listitem>
+ <para><constant>:long</constant> - Signed 32 or 64 bits, depending upon the platform.</para>
+ </listitem>
+ <listitem>
+ <para><constant>:unsigned-long</constant> - Unsigned 32 or 64 bits, depending upon the platform.</para>
+ </listitem>
+ <listitem>
+ <para><constant>:float</constant> - 32-bit floating point.</para>
+ </listitem>
+ <listitem>
+ <para><constant>:double</constant> - 64-bit floating point.</para>
+ </listitem>
+ <listitem>
+ <para><constant>:cstring</constant> -
+A &null; terminated string used for passing and returning characters strings with a &c; function.
+ </para>
+ </listitem>
+ <listitem>
+ <para><constant>:void</constant> -
+The absence of a value. Used to indicate that a function does not return a value.</para>
+ </listitem>
+ <listitem>
+ <para><constant>:pointer-void</constant> -
+Points to a generic object.</para>
+ </listitem>
+ <listitem>
+ <para><constant>*</constant> - Used to declare a pointer to an object</para>
+ </listitem>
+ </itemizedlist>
+ </partintro>
+
+ <refentry id="def-constant">
+ <refnamediv>
+ <refname>def-constant</refname>
+ <refpurpose>Binds a symbol to a constant.
+ </refpurpose>
+ <refclass>Macro</refclass>
+ </refnamediv>
+ <refsynopsisdiv>
+ <title>Syntax</title>
+ <synopsis>
+ <function>def-constant</function> <replaceable>name value &key export</replaceable>
+ </synopsis>
+ </refsynopsisdiv>
+ <refsect1>
+ <title>Arguments and Values</title>
+ <variablelist>
+ <varlistentry>
+ <term><parameter>name</parameter></term>
+ <listitem>
+ <para>A symbol that will be bound to the value.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>value</parameter></term>
+ <listitem>
+ <para>An evaluated form that is bound the the name.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>export</parameter></term>
+ <listitem>
+ <para>When &t;, the name is exported from the current package. The default is &nil;</para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+ <refsect1>
+ <title>Description</title>
+ <para>
+ This is a thin wrapper around
+ <function>defconstant</function>. It evaluates at
+ compile-time and optionally exports the symbol from the package.
+ </para>
+ </refsect1>
+ <refsect1>
+ <title>Examples</title>
+ <programlisting>
+(def-constant pi2 (* 2 pi))
+(def-constant exported-pi2 (* 2 pi) :export t)
+ </programlisting>
+ </refsect1>
+ <refsect1>
+ <title>Side Effects</title>
+ <para>Creates a new special variable..</para>
+ </refsect1>
+ <refsect1>
+ <title>Affected by</title>
+ <para>None.</para>
+ </refsect1>
+ <refsect1>
+ <title>Exceptional Situations</title>
+ <para>None.</para>
+ </refsect1>
+ </refentry>
+
+ <refentry id="def-foreign-type">
+ <refnamediv>
+ <refname>def-foreign-type</refname>
+ <refpurpose>Defines a new foreign type.
+ </refpurpose>
+ <refclass>Macro</refclass>
+ </refnamediv>
+ <refsect1>
+ <title>Syntax</title>
+<synopsis>
+ <function>def-foreign-type</function> <replaceable>name type</replaceable>
+</synopsis>
+ </refsect1>
+ <refsect1>
+ <title>Arguments and Values</title>
+ <variablelist>
+ <varlistentry>
+ <term><parameter>name</parameter></term>
+ <listitem>
+ <para>A symbol naming the new foreign type.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>value</parameter></term>
+ <listitem>
+ <para>A form that is not evaluated that defines the new
+foreign type.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+ <refsect1>
+ <title>Description</title>
+ <para>Defines a new foreign type.
+ </para>
+ </refsect1>
+ <refsect1>
+ <title>Examples</title>
+ <programlisting>
+(def-foreign-type my-generic-pointer :pointer-void)
+(def-foreign-type a-double-float :double-float)
+(def-foreign-type char-ptr (* :char))
+ </programlisting>
+ </refsect1>
+ <refsect1>
+ <title>Side Effects</title>
+ <para>Defines a new foreign type.
+ </para>
+ </refsect1>
+ <refsect1>
+ <title>Affected by</title>
+ <para>None.</para>
+ </refsect1>
+ <refsect1>
+ <title>Exceptional Situations</title>
+ <para>None.</para>
+ </refsect1>
+ </refentry>
+
+ <refentry id="null-char-p">
+ <refnamediv>
+ <refname>null-char-p</refname>
+ <refpurpose>Tests a character for &null; value.
+ </refpurpose>
+ <refclass>Macro</refclass>
+ </refnamediv>
+ <refsect1>
+ <title>Syntax</title>
+<synopsis>
+ <function>null-char-p</function> <replaceable>char</replaceable> => <returnvalue>is-null</returnvalue>
+</synopsis>
+ </refsect1>
+ <refsect1>
+ <title>Arguments and Values</title>
+ <variablelist>
+ <varlistentry>
+ <term><parameter>char</parameter></term>
+ <listitem>
+ <para>A character or integer.
+ </para>
+ </listitem>
+ </varlistentry>
+ <varlistentry>
+ <term><parameter>is-null</parameter></term>
+ <listitem>
+ <para>A boolean flag indicating if char is a &null; value.
+ </para>
+ </listitem>
+ </varlistentry>
+ </variablelist>
+ </refsect1>
+ <refsect1>
+ <title>Description</title>
+ <para>
+ A predicate testing if a character or integer is &null;. This
+abstracts the difference in implementations where some return a
+<computeroutput>character</computeroutput> and some return a
+<computeroutput>integer</computeroutput> whence dereferencing a
+<computeroutput>C</computeroutput> character pointer.
+ </para>
+ </refsect1>
+ <refsect1>
+ <title>Examples</title>
+ <programlisting>
+(def-array-pointer ca :unsigned-char)
+(let ((fs (convert-to-foreign-string "ab")))
+ (values (null-char-p (deref-array fs 'ca 0))
+ (null-char-p (deref-array fs 'ca 2))))
+=> &nil;
+ &t;
+ </programlisting>
+ </refsect1>
+ <refsect1>
+ <title>Side Effects</title>
+ <para>None.
+ </para>
+ </refsect1>
+ <refsect1>
+ <title>Affected by</title>
+ <para>None.</para>
+ </refsect1>
+ <refsect1>
+ <title>Exceptional Situations</title>
+ <para>None.</para>
+ </refsect1>
+ </refentry>
+ </reference>
projects / uffi.git / blobdiff