1067 lines
47 KiB
HTML
1067 lines
47 KiB
HTML
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</head>
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<body>
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<div class="document" id="dfhack-lua-api">
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<h1 class="title">DFHack Lua API</h1>
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<div class="contents topic" id="contents">
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<p class="topic-title first">Contents</p>
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<ul class="simple">
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<li><a class="reference internal" href="#df-structure-wrapper" id="id1">DF structure wrapper</a><ul>
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<li><a class="reference internal" href="#typed-object-references" id="id2">Typed object references</a><ul>
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<li><a class="reference internal" href="#primitive-references" id="id3">Primitive references</a></li>
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<li><a class="reference internal" href="#struct-references" id="id4">Struct references</a></li>
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<li><a class="reference internal" href="#container-references" id="id5">Container references</a></li>
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<li><a class="reference internal" href="#bitfield-references" id="id6">Bitfield references</a></li>
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</ul>
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</li>
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|
<li><a class="reference internal" href="#named-types" id="id7">Named types</a></li>
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|
<li><a class="reference internal" href="#global-functions" id="id8">Global functions</a></li>
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<li><a class="reference internal" href="#recursive-table-assignment" id="id9">Recursive table assignment</a></li>
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</ul>
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</li>
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|
<li><a class="reference internal" href="#dfhack-utilities" id="id10">DFHack utilities</a><ul>
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<li><a class="reference internal" href="#persistent-configuration-storage" id="id11">Persistent configuration storage</a></li>
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|
<li><a class="reference internal" href="#material-info-lookup" id="id12">Material info lookup</a></li>
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|
<li><a class="reference internal" href="#c-function-wrappers" id="id13">C++ function wrappers</a><ul>
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<li><a class="reference internal" href="#gui-module" id="id14">Gui module</a></li>
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<li><a class="reference internal" href="#job-module" id="id15">Job module</a></li>
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|
<li><a class="reference internal" href="#units-module" id="id16">Units module</a></li>
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|
<li><a class="reference internal" href="#items-module" id="id17">Items module</a></li>
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|
<li><a class="reference internal" href="#maps-module" id="id18">Maps module</a></li>
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</ul>
|
|
</li>
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|
<li><a class="reference internal" href="#core-interpreter-context" id="id19">Core interpreter context</a><ul>
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|
<li><a class="reference internal" href="#event-type" id="id20">Event type</a></li>
|
|
</ul>
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|
</li>
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|
</ul>
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</li>
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|
</ul>
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|
</div>
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<div class="section" id="df-structure-wrapper">
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<h1><a class="toc-backref" href="#id1">DF structure wrapper</a></h1>
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<p>DF structures described by the xml files in library/xml are exported
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to lua code as a tree of objects and functions under the <tt class="docutils literal">df</tt> global,
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which broadly maps to the <tt class="docutils literal">df</tt> namespace in C++.</p>
|
|
<p><strong>WARNING</strong>: The wrapper provides almost raw access to the memory
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|
of the game, so mistakes in manipulating objects are as likely to
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crash the game as equivalent plain C++ code would be. E.g. NULL
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|
pointer access is safely detected, but dangling pointers aren't.</p>
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|
<p>Objects managed by the wrapper can be broadly classified into the following groups:</p>
|
|
<ol class="arabic">
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|
<li><p class="first">Typed object pointers (references).</p>
|
|
<p>References represent objects in DF memory with a known type.</p>
|
|
<p>In addition to fields and methods defined by the wrapped type,
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|
every reference has some built-in properties and methods.</p>
|
|
</li>
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|
<li><p class="first">Untyped pointers</p>
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<p>Represented as lightuserdata.</p>
|
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<p>In assignment to a pointer NULL can be represented either as
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<tt class="docutils literal">nil</tt>, or a NULL lightuserdata; reading a NULL pointer field
|
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returns <tt class="docutils literal">nil</tt>.</p>
|
|
</li>
|
|
<li><p class="first">Named types</p>
|
|
<p>Objects in the <tt class="docutils literal">df</tt> tree that represent identity of struct, class,
|
|
enum and bitfield types. They host nested named types, static
|
|
methods, builtin properties & methods, and, for enums and bitfields,
|
|
the bi-directional mapping between key names and values.</p>
|
|
</li>
|
|
<li><p class="first">The <tt class="docutils literal">global</tt> object</p>
|
|
<p><tt class="docutils literal">df.global</tt> corresponds to the <tt class="docutils literal"><span class="pre">df::global</span></tt> namespace, and
|
|
behaves as a mix between a named type and a reference, containing
|
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both nested types and fields corresponding to global symbols.</p>
|
|
</li>
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|
</ol>
|
|
<p>In addition to the <tt class="docutils literal">global</tt> object and top-level types the <tt class="docutils literal">df</tt>
|
|
global also contains a few global builtin utility functions.</p>
|
|
<div class="section" id="typed-object-references">
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<h2><a class="toc-backref" href="#id2">Typed object references</a></h2>
|
|
<p>The underlying primitive lua object is userdata with a metatable.
|
|
Every structured field access produces a new userdata instance.</p>
|
|
<p>All typed objects have the following built-in features:</p>
|
|
<ul>
|
|
<li><p class="first"><tt class="docutils literal">ref1 == ref2</tt>, <tt class="docutils literal">tostring(ref)</tt></p>
|
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<p>References implement equality by type & pointer value, and string conversion.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">pairs(ref)</tt></p>
|
|
<p>Returns an iterator for the sequence of actual C++ field names
|
|
and values. Fields are enumerated in memory order. Methods and
|
|
lua wrapper properties are not included in the iteration.</p>
|
|
<p><strong>WARNING</strong>: a few of the data structures (like ui_look_list)
|
|
contain unions with pointers to different types with vtables.
|
|
Using pairs on such structs is an almost sure way to crash with
|
|
an access violation.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">ref._kind</tt></p>
|
|
<p>Returns one of: <tt class="docutils literal">primitive</tt>, <tt class="docutils literal">struct</tt>, <tt class="docutils literal">container</tt>,
|
|
or <tt class="docutils literal">bitfield</tt>, as appropriate for the referenced object.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">ref._type</tt></p>
|
|
<p>Returns the named type object or a string that represents
|
|
the referenced object type.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">ref:sizeof()</tt></p>
|
|
<p>Returns <em>size, address</em></p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">ref:new()</tt></p>
|
|
<p>Allocates a new instance of the same type, and copies data
|
|
from the current object.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">ref:delete()</tt></p>
|
|
<p>Destroys the object with the C++ <tt class="docutils literal">delete</tt> operator.
|
|
If destructor is not available, returns <em>false</em>.</p>
|
|
<p><strong>WARNING</strong>: the lua reference object remains as a dangling
|
|
pointer, like a raw C++ pointer would.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">ref:assign(object)</tt></p>
|
|
<p>Assigns data from object to ref. Object must either be another
|
|
ref of a compatible type, or a lua table; in the latter case
|
|
special recursive assignment rules are applied.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal"><span class="pre">ref:_displace(index[,step])</span></tt></p>
|
|
<p>Returns a new reference with the pointer adjusted by index*step.
|
|
Step defaults to the natural object size.</p>
|
|
</li>
|
|
</ul>
|
|
<div class="section" id="primitive-references">
|
|
<h3><a class="toc-backref" href="#id3">Primitive references</a></h3>
|
|
<p>References of the <em>_kind</em> <tt class="docutils literal">'primitive'</tt> are used for objects
|
|
that don't fit any of the other reference types. Such
|
|
references can only appear as a value of a pointer field,
|
|
or as a result of calling the <tt class="docutils literal">_field()</tt> method.</p>
|
|
<p>They behave as structs with one field <tt class="docutils literal">value</tt> of the right type.</p>
|
|
</div>
|
|
<div class="section" id="struct-references">
|
|
<h3><a class="toc-backref" href="#id4">Struct references</a></h3>
|
|
<p>Struct references are used for class and struct objects.</p>
|
|
<p>They implement the following features:</p>
|
|
<ul>
|
|
<li><p class="first"><tt class="docutils literal">ref.field</tt>, <tt class="docutils literal">ref.field = value</tt></p>
|
|
<p>Valid fields of the structure may be accessed by subscript.</p>
|
|
<p>Primitive typed fields, i.e. numbers & strings, are converted
|
|
to/from matching lua values. The value of a pointer is a reference
|
|
to the target, or nil/NULL. Complex types are represented by
|
|
a reference to the field within the structure; unless recursive
|
|
lua table assignment is used, such fields can only be read.</p>
|
|
<p><strong>NOTE:</strong> In case of inheritance, <em>superclass</em> fields have precedence
|
|
over the subclass, but fields shadowed in this way can still
|
|
be accessed as <tt class="docutils literal"><span class="pre">ref['subclasstype.field']</span></tt>.
|
|
This shadowing order is necessary because vtable-based classes
|
|
are automatically exposed in their exact type, and the reverse
|
|
rule would make access to superclass fields unreliable.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">ref._field(field)</tt></p>
|
|
<p>Returns a reference to a valid field. That is, unlike regular
|
|
subscript, it returns a reference to the field within the structure
|
|
even for primitive typed fields and pointers.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal"><span class="pre">ref:vmethod(args...)</span></tt></p>
|
|
<p>Named virtual methods are also exposed, subject to the same
|
|
shadowing rules.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">pairs(ref)</tt></p>
|
|
<p>Enumerates all real fields (but not methods) in memory
|
|
(= declaration) order.</p>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
<div class="section" id="container-references">
|
|
<h3><a class="toc-backref" href="#id5">Container references</a></h3>
|
|
<p>Containers represent vectors and arrays, possibly resizable.</p>
|
|
<p>A container field can associate an enum to the container
|
|
reference, which allows accessing elements using string keys
|
|
instead of numerical indices.</p>
|
|
<p>Implemented features:</p>
|
|
<ul>
|
|
<li><p class="first"><tt class="docutils literal">ref._enum</tt></p>
|
|
<p>If the container has an associated enum, returns the matching
|
|
named type object.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">#ref</tt></p>
|
|
<p>Returns the <em>length</em> of the container.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">ref[index]</tt></p>
|
|
<p>Accesses the container element, using either a <em>0-based</em> numerical
|
|
index, or, if an enum is associated, a valid enum key string.</p>
|
|
<p>Accessing an invalid index is an error, but some container types
|
|
may return a default value, or auto-resize instead for convenience.
|
|
Currently this relaxed mode is implemented by df-flagarray aka BitArray.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">ref._field(index)</tt></p>
|
|
<p>Like with structs, returns a pointer to the array element, if possible.
|
|
Flag and bit arrays cannot return such pointer, so it fails with an error.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">pairs(ref)</tt>, <tt class="docutils literal">ipairs(ref)</tt></p>
|
|
<p>If the container has no associated enum, both behave identically,
|
|
iterating over numerical indices in order. Otherwise, ipairs still
|
|
uses numbers, while pairs tries to substitute enum keys whenever
|
|
possible.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">ref:resize(new_size)</tt></p>
|
|
<p>Resizes the container if supported, or fails with an error.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">ref:insert(index,item)</tt></p>
|
|
<p>Inserts a new item at the specified index. To add at the end,
|
|
use <tt class="docutils literal">#ref</tt> as index.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">ref:erase(index)</tt></p>
|
|
<p>Removes the element at the given valid index.</p>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
<div class="section" id="bitfield-references">
|
|
<h3><a class="toc-backref" href="#id6">Bitfield references</a></h3>
|
|
<p>Bitfields behave like special fixed-size containers.
|
|
The <tt class="docutils literal">_enum</tt> property points to the bitfield type.</p>
|
|
<p>Numerical indices correspond to the shift value,
|
|
and if a subfield occupies multiple bits, the
|
|
<tt class="docutils literal">ipairs</tt> order would have a gap.</p>
|
|
</div>
|
|
</div>
|
|
<div class="section" id="named-types">
|
|
<h2><a class="toc-backref" href="#id7">Named types</a></h2>
|
|
<p>Named types are exposed in the <tt class="docutils literal">df</tt> tree with names identical
|
|
to the C++ version, except for the <tt class="docutils literal">::</tt> vs <tt class="docutils literal">.</tt> difference.</p>
|
|
<p>All types and the global object have the following features:</p>
|
|
<ul>
|
|
<li><p class="first"><tt class="docutils literal">type._kind</tt></p>
|
|
<p>Evaluates to one of <tt class="docutils literal"><span class="pre">struct-type</span></tt>, <tt class="docutils literal"><span class="pre">class-type</span></tt>, <tt class="docutils literal"><span class="pre">enum-type</span></tt>,
|
|
<tt class="docutils literal"><span class="pre">bitfield-type</span></tt> or <tt class="docutils literal">global</tt>.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">type._identity</tt></p>
|
|
<p>Contains a lightuserdata pointing to the underlying
|
|
DFHack::type_instance object.</p>
|
|
</li>
|
|
</ul>
|
|
<p>Types excluding the global object also support:</p>
|
|
<ul>
|
|
<li><p class="first"><tt class="docutils literal">type:sizeof()</tt></p>
|
|
<p>Returns the size of an object of the type.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">type:new()</tt></p>
|
|
<p>Creates a new instance of an object of the type.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">type:is_instance(object)</tt></p>
|
|
<p>Returns true if object is same or subclass type, or a reference
|
|
to an object of same or subclass type. It is permissible to pass
|
|
nil, NULL or non-wrapper value as object; in this case the
|
|
method returns nil.</p>
|
|
</li>
|
|
</ul>
|
|
<p>In addition to this, enum and bitfield types contain a
|
|
bi-directional mapping between key strings and values, and
|
|
also map <tt class="docutils literal">_first_item</tt> and <tt class="docutils literal">_last_item</tt> to the min and
|
|
max values.</p>
|
|
<p>Struct and class types with instance-vector attribute in the
|
|
xml have a <tt class="docutils literal">type.find(key)</tt> function that wraps the find
|
|
method provided in C++.</p>
|
|
</div>
|
|
<div class="section" id="global-functions">
|
|
<h2><a class="toc-backref" href="#id8">Global functions</a></h2>
|
|
<p>The <tt class="docutils literal">df</tt> table itself contains the following functions and values:</p>
|
|
<ul>
|
|
<li><p class="first"><tt class="docutils literal">NULL</tt>, <tt class="docutils literal">df.NULL</tt></p>
|
|
<p>Contains the NULL lightuserdata.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">df.isnull(obj)</tt></p>
|
|
<p>Evaluates to true if obj is nil or NULL; false otherwise.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal"><span class="pre">df.isvalid(obj[,allow_null])</span></tt></p>
|
|
<p>For supported objects returns one of <tt class="docutils literal">type</tt>, <tt class="docutils literal">voidptr</tt>, <tt class="docutils literal">ref</tt>.</p>
|
|
<p>If <em>allow_null</em> is true, and obj is nil or NULL, returns <tt class="docutils literal">null</tt>.</p>
|
|
<p>Otherwise returns <em>nil</em>.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">df.sizeof(obj)</tt></p>
|
|
<p>For types and refs identical to <tt class="docutils literal">obj:sizeof()</tt>.
|
|
For lightuserdata returns <em>nil, address</em></p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">df.new(obj)</tt>, <tt class="docutils literal">df.delete(obj)</tt>, <tt class="docutils literal">df.assign(obj, obj2)</tt></p>
|
|
<p>Equivalent to using the matching methods of obj.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal"><span class="pre">df._displace(obj,index[,step])</span></tt></p>
|
|
<p>For refs equivalent to the method, but also works with
|
|
lightuserdata (step is mandatory then).</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">df.is_instance(type,obj)</tt></p>
|
|
<p>Equivalent to the method, but also allows a reference as proxy for its type.</p>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
<div class="section" id="recursive-table-assignment">
|
|
<h2><a class="toc-backref" href="#id9">Recursive table assignment</a></h2>
|
|
<p>Recursive assignment is invoked when a lua table is assigned
|
|
to a C++ object or field, i.e. one of:</p>
|
|
<ul class="simple">
|
|
<li><tt class="docutils literal"><span class="pre">ref:assign{...}</span></tt></li>
|
|
<li><tt class="docutils literal">ref.field = <span class="pre">{...}</span></tt></li>
|
|
</ul>
|
|
<p>The general mode of operation is that all fields of the table
|
|
are assigned to the fields of the target structure, roughly
|
|
emulating the following code:</p>
|
|
<pre class="literal-block">
|
|
function rec_assign(ref,table)
|
|
for key,value in pairs(table) do
|
|
ref[key] = value
|
|
end
|
|
end
|
|
</pre>
|
|
<p>Since assigning a table to a field using = invokes the same
|
|
process, it is recursive.</p>
|
|
<p>There are however some variations to this process depending
|
|
on the type of the field being assigned to:</p>
|
|
<ol class="arabic">
|
|
<li><p class="first">If the table contains an <tt class="docutils literal">assign</tt> field, it is
|
|
applied first, using the <tt class="docutils literal">ref:assign(value)</tt> method.
|
|
It is never assigned as a usual field.</p>
|
|
</li>
|
|
<li><p class="first">When a table is assigned to a non-NULL pointer field
|
|
using the <tt class="docutils literal">ref.field = <span class="pre">{...}</span></tt> syntax, it is applied
|
|
to the target of the pointer instead.</p>
|
|
<p>If the pointer is NULL, the table is checked for a <tt class="docutils literal">new</tt> field:</p>
|
|
<ol class="loweralpha simple">
|
|
<li>If it is <em>nil</em> or <em>false</em>, assignment fails with an error.</li>
|
|
<li>If it is <em>true</em>, the pointer is initialized with a newly
|
|
allocated object of the declared target type of the pointer.</li>
|
|
<li>Otherwise, <tt class="docutils literal">table.new</tt> must be a named type, or an
|
|
object of a type compatible with the pointer. The pointer
|
|
is initialized with the result of calling <tt class="docutils literal">table.new:new()</tt>.</li>
|
|
</ol>
|
|
<p>After this auto-vivification process, assignment proceeds
|
|
as if the pointer wasn't NULL.</p>
|
|
<p>Obviously, the <tt class="docutils literal">new</tt> field inside the table is always skipped
|
|
during the actual per-field assignment processing.</p>
|
|
</li>
|
|
<li><p class="first">If the target of the assignment is a container, a separate
|
|
rule set is used:</p>
|
|
<ol class="loweralpha">
|
|
<li><p class="first">If the table contains neither <tt class="docutils literal">assign</tt> nor <tt class="docutils literal">resize</tt>
|
|
fields, it is interpreted as an ordinary <em>1-based</em> lua
|
|
array. The container is resized to the #-size of the
|
|
table, and elements are assigned in numeric order:</p>
|
|
<pre class="literal-block">
|
|
ref:resize(#table);
|
|
for i=1,#table do ref[i-1] = table[i] end
|
|
</pre>
|
|
</li>
|
|
<li><p class="first">Otherwise, <tt class="docutils literal">resize</tt> must be <em>true</em>, <em>false</em>, or
|
|
an explicit number. If it is not false, the container
|
|
is resized. After that the usual struct-like 'pairs'
|
|
assignment is performed.</p>
|
|
<p>In case <tt class="docutils literal">resize</tt> is <em>true</em>, the size is computed
|
|
by scanning the table for the largest numeric key.</p>
|
|
</li>
|
|
</ol>
|
|
<p>This means that in order to reassign only one element of
|
|
a container using this system, it is necessary to use:</p>
|
|
<pre class="literal-block">
|
|
{ resize=false, [idx]=value }
|
|
</pre>
|
|
</li>
|
|
</ol>
|
|
<p>Since nil inside a table is indistinguishable from missing key,
|
|
it is necessary to use <tt class="docutils literal">df.NULL</tt> as a null pointer value.</p>
|
|
<p>This system is intended as a way to define a nested object
|
|
tree using pure lua data structures, and then materialize it in
|
|
C++ memory in one go. Note that if pointer auto-vivification
|
|
is used, an error in the middle of the recursive walk would
|
|
not destroy any objects allocated in this way, so the user
|
|
should be prepared to catch the error and do the necessary
|
|
cleanup.</p>
|
|
</div>
|
|
</div>
|
|
<div class="section" id="dfhack-utilities">
|
|
<h1><a class="toc-backref" href="#id10">DFHack utilities</a></h1>
|
|
<p>DFHack utility functions are placed in the <tt class="docutils literal">dfhack</tt> global tree.</p>
|
|
<p>Currently it defines the following features:</p>
|
|
<ul>
|
|
<li><p class="first"><tt class="docutils literal"><span class="pre">dfhack.print(args...)</span></tt></p>
|
|
<p>Output tab-separated args as standard lua print would do,
|
|
but without a newline.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal"><span class="pre">print(args...)</span></tt>, <tt class="docutils literal"><span class="pre">dfhack.println(args...)</span></tt></p>
|
|
<p>A replacement of the standard library print function that
|
|
works with DFHack output infrastructure.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal"><span class="pre">dfhack.printerr(args...)</span></tt></p>
|
|
<p>Same as println; intended for errors. Uses red color and logs to stderr.log.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal"><span class="pre">dfhack.color([color])</span></tt></p>
|
|
<p>Sets the current output color. If color is <em>nil</em> or <em>-1</em>, resets to default.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.is_interactive()</tt></p>
|
|
<p>Checks if the thread can access the interactive console and returns <em>true</em> or <em>false</em>.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal"><span class="pre">dfhack.lineedit([prompt[,history_filename]])</span></tt></p>
|
|
<p>If the thread owns the interactive console, shows a prompt
|
|
and returns the entered string. Otherwise returns <em>nil, error</em>.</p>
|
|
<p>Depending on the context, this function may actually yield the
|
|
running coroutine and let the C++ code release the core suspend
|
|
lock. Using an explicit <tt class="docutils literal">dfhack.with_suspend</tt> will prevent
|
|
this, forcing the function to block on input with lock held.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal"><span class="pre">dfhack.interpreter([prompt[,env[,history_filename]]])</span></tt></p>
|
|
<p>Starts an interactive lua interpreter, using the specified prompt
|
|
string, global environment and command-line history file.</p>
|
|
<p>If the interactive console is not accessible, returns <em>nil, error</em>.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal"><span class="pre">dfhack.pcall(f[,args...])</span></tt></p>
|
|
<p>Invokes f via xpcall, using an error function that attaches
|
|
a stack trace to the error. The same function is used by SafeCall
|
|
in C++, and dfhack.safecall.</p>
|
|
<p>The returned error is a table with separate <tt class="docutils literal">message</tt> and
|
|
<tt class="docutils literal">stacktrace</tt> string fields; it implements <tt class="docutils literal">__tostring</tt>.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal"><span class="pre">safecall(f[,args...])</span></tt>, <tt class="docutils literal"><span class="pre">dfhack.safecall(f[,args...])</span></tt></p>
|
|
<p>Just like pcall, but also prints the error using printerr before
|
|
returning. Intended as a convenience function.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal"><span class="pre">dfhack.saferesume(coroutine[,args...])</span></tt></p>
|
|
<p>Compares to coroutine.resume like dfhack.safecall vs pcall.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal"><span class="pre">dfhack.with_suspend(f[,args...])</span></tt></p>
|
|
<p>Calls <tt class="docutils literal">f</tt> with arguments after grabbing the DF core suspend lock.
|
|
Suspending is necessary for accessing a consistent state of DF memory.</p>
|
|
<p>Returned values and errors are propagated through after releasing
|
|
the lock. It is safe to nest suspends.</p>
|
|
<p>Every thread is allowed only one suspend per DF frame, so it is best
|
|
to group operations together in one big critical section. A plugin
|
|
can choose to run all lua code inside a C++-side suspend lock.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal"><span class="pre">dfhack.call_with_finalizer(num_cleanup_args,always,cleanup_fn[,cleanup_args...],fn[,args...])</span></tt></p>
|
|
<p>Invokes <tt class="docutils literal">fn</tt> with <tt class="docutils literal">args</tt>, and after it returns or throws an
|
|
error calls <tt class="docutils literal">cleanup_fn</tt> with <tt class="docutils literal">cleanup_args</tt>. Any return values from
|
|
<tt class="docutils literal">fn</tt> are propagated, and errors are re-thrown.</p>
|
|
<p>The <tt class="docutils literal">num_cleanup_args</tt> integer specifies the number of <tt class="docutils literal">cleanup_args</tt>,
|
|
and the <tt class="docutils literal">always</tt> boolean specifies if cleanup should be called in any case,
|
|
or only in case of an error.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal"><span class="pre">dfhack.with_finalize(cleanup_fn,fn[,args...])</span></tt></p>
|
|
<p>Calls <tt class="docutils literal">fn</tt> with arguments, then finalizes with <tt class="docutils literal">cleanup_fn</tt>.
|
|
Implemented using <tt class="docutils literal"><span class="pre">call_with_finalizer(0,true,...)</span></tt>.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal"><span class="pre">dfhack.with_onerror(cleanup_fn,fn[,args...])</span></tt></p>
|
|
<p>Calls <tt class="docutils literal">fn</tt> with arguments, then finalizes with <tt class="docutils literal">cleanup_fn</tt> on any thrown error.
|
|
Implemented using <tt class="docutils literal"><span class="pre">call_with_finalizer(0,false,...)</span></tt>.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal"><span class="pre">dfhack.with_temp_object(obj,fn[,args...])</span></tt></p>
|
|
<p>Calls <tt class="docutils literal"><span class="pre">fn(obj,args...)</span></tt>, then finalizes with <tt class="docutils literal">obj:delete()</tt>.</p>
|
|
</li>
|
|
</ul>
|
|
<div class="section" id="persistent-configuration-storage">
|
|
<h2><a class="toc-backref" href="#id11">Persistent configuration storage</a></h2>
|
|
<p>This api is intended for storing configuration options in the world itself.
|
|
It probably should be restricted to data that is world-dependent.</p>
|
|
<p>Entries are identified by a string <tt class="docutils literal">key</tt>, but it is also possible to manage
|
|
multiple entries with the same key; their identity is determined by <tt class="docutils literal">entry_id</tt>.
|
|
Every entry has a mutable string <tt class="docutils literal">value</tt>, and an array of 7 mutable <tt class="docutils literal">ints</tt>.</p>
|
|
<ul>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.persistent.get(key)</tt>, <tt class="docutils literal">entry:get()</tt></p>
|
|
<p>Retrieves a persistent config record with the given string key,
|
|
or refreshes an already retrieved entry. If there are multiple
|
|
entries with the same key, it is undefined which one is retrieved
|
|
by the first version of the call.</p>
|
|
<p>Returns entry, or <em>nil</em> if not found.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.persistent.delete(key)</tt>, <tt class="docutils literal">entry:delete()</tt></p>
|
|
<p>Removes an existing entry. Returns <em>true</em> if succeeded.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal"><span class="pre">dfhack.persistent.get_all(key[,match_prefix])</span></tt></p>
|
|
<p>Retrieves all entries with the same key, or starting with key..'/'.
|
|
Calling <tt class="docutils literal"><span class="pre">get_all('',true)</span></tt> will match all entries.</p>
|
|
<p>If none found, returns nil; otherwise returns an array of entries.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal"><span class="pre">dfhack.persistent.save({key=str1,</span> <span class="pre">...}[,new])</span></tt>, <tt class="docutils literal"><span class="pre">entry:save([new])</span></tt></p>
|
|
<p>Saves changes in an entry, or creates a new one. Passing true as
|
|
new forces creation of a new entry even if one already exists;
|
|
otherwise the existing one is simply updated.
|
|
Returns <em>entry, did_create_new</em></p>
|
|
</li>
|
|
</ul>
|
|
<p>Since the data is hidden in data structures owned by the DF world,
|
|
and automatically stored in the save game, these save and retrieval
|
|
functions can just copy values in memory without doing any actual I/O.
|
|
However, currently every entry has a 180+-byte dead-weight overhead.</p>
|
|
</div>
|
|
<div class="section" id="material-info-lookup">
|
|
<h2><a class="toc-backref" href="#id12">Material info lookup</a></h2>
|
|
<p>A material info record has fields:</p>
|
|
<ul>
|
|
<li><p class="first"><tt class="docutils literal">type</tt>, <tt class="docutils literal">index</tt>, <tt class="docutils literal">material</tt></p>
|
|
<p>DF material code pair, and a reference to the material object.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">mode</tt></p>
|
|
<p>One of <tt class="docutils literal">'builtin'</tt>, <tt class="docutils literal">'inorganic'</tt>, <tt class="docutils literal">'plant'</tt>, <tt class="docutils literal">'creature'</tt>.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">inorganic</tt>, <tt class="docutils literal">plant</tt>, <tt class="docutils literal">creature</tt></p>
|
|
<p>If the material is of the matching type, contains a reference to the raw object.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">figure</tt></p>
|
|
<p>For a specific creature material contains a ref to the historical figure.</p>
|
|
</li>
|
|
</ul>
|
|
<p>Functions:</p>
|
|
<ul>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.matinfo.decode(type,index)</tt></p>
|
|
<p>Looks up material info for the given number pair; if not found, returs <em>nil</em>.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal"><span class="pre">....decode(matinfo)</span></tt>, <tt class="docutils literal"><span class="pre">....decode(item)</span></tt>, <tt class="docutils literal"><span class="pre">....decode(obj)</span></tt></p>
|
|
<p>Uses <tt class="docutils literal">matinfo.type</tt>/<tt class="docutils literal">matinfo.index</tt>, item getter vmethods,
|
|
or <tt class="docutils literal">obj.mat_type</tt>/<tt class="docutils literal">obj.mat_index</tt> to get the code pair.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal"><span class="pre">dfhack.matinfo.find(token[,token...])</span></tt></p>
|
|
<p>Looks up material by a token string, or a pre-split string token sequence.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal"><span class="pre">dfhack.matinfo.getToken(...)</span></tt>, <tt class="docutils literal">info:getToken()</tt></p>
|
|
<p>Applies <tt class="docutils literal">decode</tt> and constructs a string token.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal"><span class="pre">info:toString([temperature[,named]])</span></tt></p>
|
|
<p>Returns the human-readable name at the given temperature.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">info:getCraftClass()</tt></p>
|
|
<p>Returns the classification used for craft skills.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">info:matches(obj)</tt></p>
|
|
<p>Checks if the material matches job_material_category or job_item.
|
|
Accept dfhack_material_category auto-assign table.</p>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
<div class="section" id="c-function-wrappers">
|
|
<h2><a class="toc-backref" href="#id13">C++ function wrappers</a></h2>
|
|
<p>Thin wrappers around C++ functions, similar to the ones for virtual methods.</p>
|
|
<ul>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.TranslateName(name,in_english,only_last_name)</tt></p>
|
|
<p>Convert a language_name or only the last name part to string.</p>
|
|
</li>
|
|
</ul>
|
|
<div class="section" id="gui-module">
|
|
<h3><a class="toc-backref" href="#id14">Gui module</a></h3>
|
|
<ul>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.gui.getSelectedWorkshopJob(silent)</tt></p>
|
|
<p>When a job is selected in <em>'q'</em> mode, returns the job, else
|
|
prints error unless silent and returns <em>nil</em>.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.gui.getSelectedJob(silent)</tt></p>
|
|
<p>Returns the job selected in a workshop or unit/jobs screen.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.gui.getSelectedUnit(silent)</tt></p>
|
|
<p>Returns the unit selected via <em>'v'</em>, <em>'k'</em>, unit/jobs, or
|
|
a full-screen item view of a cage or suchlike.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.gui.getSelectedItem(silent)</tt></p>
|
|
<p>Returns the item selected via <em>'v'</em> ->inventory, <em>'k'</em>, <em>'t'</em>, or
|
|
a full-screen item view of a container. Note that in the
|
|
last case, the highlighted <em>contained item</em> is returned, not
|
|
the container itself.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.gui.showAnnouncement(text,color,is_bright)</tt></p>
|
|
<p>Adds a regular announcement with given text, color, and brightness.
|
|
The is_bright boolean actually seems to invert the brightness.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.gui.showPopupAnnouncement(text,color,is_bright)</tt></p>
|
|
<p>Pops up a titan-style modal announcement window.</p>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
<div class="section" id="job-module">
|
|
<h3><a class="toc-backref" href="#id15">Job module</a></h3>
|
|
<ul>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.job.cloneJobStruct(job)</tt></p>
|
|
<p>Creates a deep copy of the given job.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.job.printJobDetails(job)</tt></p>
|
|
<p>Prints info about the job.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.job.printItemDetails(jobitem,idx)</tt></p>
|
|
<p>Prints info about the job item.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.job.getHolder(job)</tt></p>
|
|
<p>Returns the building holding the job.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.job.getWorker(job)</tt></p>
|
|
<p>Returns the unit performing the job.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.job.is_equal(job1,job2)</tt></p>
|
|
<p>Compares important fields in the job and nested item structures.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.job.is_item_equal(job_item1,job_item2)</tt></p>
|
|
<p>Compares important fields in the job item structures.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.job.listNewlyCreated(first_id)</tt></p>
|
|
<p>Returns the current value of <tt class="docutils literal">df.global.job_next_id</tt>, and
|
|
if there are any jobs with <tt class="docutils literal">first_id <= id < job_next_id</tt>,
|
|
a lua list containing them.</p>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
<div class="section" id="units-module">
|
|
<h3><a class="toc-backref" href="#id16">Units module</a></h3>
|
|
<ul>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.units.getPosition(unit)</tt></p>
|
|
<p>Returns true <em>x,y,z</em> of the unit; may be not equal to unit.pos if caged.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.units.getContainer(unit)</tt></p>
|
|
<p>Returns the container (cage) item or <em>nil</em>.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.units.setNickname(unit,nick)</tt></p>
|
|
<p>Sets the unit's nickname properly.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.units.getVisibleName(unit)</tt></p>
|
|
<p>Returns the language_name object visible in game, accounting for false identities.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.units.getNemesis(unit)</tt></p>
|
|
<p>Returns the nemesis record of the unit if it has one, or <em>nil</em>.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.units.isDead(unit)</tt></p>
|
|
<p>The unit is completely dead and passive.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.units.isAlive(unit)</tt></p>
|
|
<p>The unit isn't dead or undead.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.units.isSane(unit)</tt></p>
|
|
<p>The unit is capable of rational action, i.e. not dead, insane or zombie.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.units.clearBurrowMembers(burrow)</tt></p>
|
|
<p>Removes all units from the burrow.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.units.isInBurrow(unit,burrow)</tt></p>
|
|
<p>Checks if the unit is in the burrow.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.units.setInBurrow(unit,burrow,enable)</tt></p>
|
|
<p>Adds or removes the unit from the burrow.</p>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
<div class="section" id="items-module">
|
|
<h3><a class="toc-backref" href="#id17">Items module</a></h3>
|
|
<ul>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.items.getPosition(item)</tt></p>
|
|
<p>Returns true <em>x,y,z</em> of the item; may be not equal to item.pos if in inventory.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.items.getOwner(item)</tt></p>
|
|
<p>Returns the owner unit or <em>nil</em>.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.items.setOwner(item,unit)</tt></p>
|
|
<p>Replaces the owner of the item. If unit is <em>nil</em>, removes ownership.
|
|
Returns <em>false</em> in case of error.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.items.getContainer(item)</tt></p>
|
|
<p>Returns the container item or <em>nil</em>.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.items.getContainedItems(item)</tt></p>
|
|
<p>Returns a list of items contained in this one.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.items.moveToGround(item,pos)</tt></p>
|
|
<p>Move the item to the ground at position. Returns <em>false</em> if impossible.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.items.moveToContainer(item,container)</tt></p>
|
|
<p>Move the item to the container. Returns <em>false</em> if impossible.</p>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
<div class="section" id="maps-module">
|
|
<h3><a class="toc-backref" href="#id18">Maps module</a></h3>
|
|
<ul>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.maps.getSize()</tt></p>
|
|
<p>Returns map size in blocks: <em>x, y, z</em></p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.maps.getTileSize()</tt></p>
|
|
<p>Returns map size in tiles: <em>x, y, z</em></p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.maps.getBlock(x,y,z)</tt></p>
|
|
<p>Returns a map block object for given x,y,z in local block coordinates.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.maps.getTileBlock(coords)</tt></p>
|
|
<p>Returns a map block object for given df::coord in local tile coordinates.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.maps.getRegionBiome(region_coord2d)</tt></p>
|
|
<p>Returns the biome info struct for the given global map region.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.maps.getGlobalInitFeature(index)</tt></p>
|
|
<p>Returns the global feature object with the given index.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.maps.getLocalInitFeature(region_coord2d,index)</tt></p>
|
|
<p>Returns the local feature object with the given region coords and index.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.maps.findBurrowByName(name)</tt></p>
|
|
<p>Returns the burrow pointer or <em>nil</em>.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.maps.listBurrowBlocks(burrow)</tt></p>
|
|
<p>Returns a table of map block pointers.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.maps.clearBurrowTiles(burrow)</tt></p>
|
|
<p>Removes all tiles from the burrow.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.maps.isBurrowTile(burrow,tile_coord)</tt></p>
|
|
<p>Checks if the tile is in burrow.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.maps.setBurrowTile(burrow,tile_coord,enable)</tt></p>
|
|
<p>Adds or removes the tile from the burrow. Returns <em>false</em> if invalid coords.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.maps.isBlockBurrowTile(burrow,block,x,y)</tt></p>
|
|
<p>Checks if the tile within the block is in burrow.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.maps.setBlockBurrowTile(burrow,block,x,y,enable)</tt></p>
|
|
<p>Adds or removes the tile from the burrow. Returns <em>false</em> if invalid coords.</p>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
</div>
|
|
<div class="section" id="core-interpreter-context">
|
|
<h2><a class="toc-backref" href="#id19">Core interpreter context</a></h2>
|
|
<p>While plugins can create any number of interpreter instances,
|
|
there is one special context managed by dfhack core. It is the
|
|
only context that can receive events from DF and plugins.</p>
|
|
<p>Core context specific functions:</p>
|
|
<ul>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.is_core_context</tt></p>
|
|
<p>Boolean value; <em>true</em> in the core context.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.onStateChange.foo = function(code)</tt></p>
|
|
<p>Event. Receives the same codes as plugin_onstatechange in C++.</p>
|
|
</li>
|
|
</ul>
|
|
<div class="section" id="event-type">
|
|
<h3><a class="toc-backref" href="#id20">Event type</a></h3>
|
|
<p>An event is just a lua table with a predefined metatable that
|
|
contains a __call metamethod. When it is invoked, it loops
|
|
through the table with next and calls all contained values.
|
|
This is intended as an extensible way to add listeners.</p>
|
|
<p>This type itself is available in any context, but only the
|
|
core context has the actual events defined by C++ code.</p>
|
|
<p>Features:</p>
|
|
<ul>
|
|
<li><p class="first"><tt class="docutils literal">dfhack.event.new()</tt></p>
|
|
<p>Creates a new instance of an event.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal">event[key] = function</tt></p>
|
|
<p>Sets the function as one of the listeners.</p>
|
|
<p><strong>NOTE</strong>: The <tt class="docutils literal">df.NULL</tt> key is reserved for the use by
|
|
the C++ owner of the event, and has some special semantics.</p>
|
|
</li>
|
|
<li><p class="first"><tt class="docutils literal"><span class="pre">event(args...)</span></tt></p>
|
|
<p>Invokes all listeners contained in the event in an arbitrary
|
|
order using <tt class="docutils literal">dfhack.safecall</tt>.</p>
|
|
</li>
|
|
</ul>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</div>
|
|
</body>
|
|
</html>
|