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aaron
43 lines
1.3 KiB
ReStructuredText
43 lines
1.3 KiB
ReStructuredText
Interfacing with C/C++ Libraries
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================================
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ctypes
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------
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`ctypes <https://docs.python.org/3/library/ctypes.html>`_ is the de facto
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library for interfacing with C/C++, and it provides not only full access to
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the native C interface of most major operating systems (e.g., kernel32 on
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Windows, or libc on *nix), but also provides support for loading and
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interfacing with dynamic libraries, such as DLLs or shared objects at runtime.
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It does bring along with it a whole host of types for interacting with system
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APIs, and allows you to rather easily define your own complex types, such
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as structs and unions, and allows you to modify things such as padding and
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alignment, if needed. It can be a bit crufty to use, but in conjunction with
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the `struct <https://docs.python.org/3.5/library/struct.html>`_ module, you
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are essentially provided full control over how your data types get translated
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into something something usable by a C(++).
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Struct Equivalents
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~~~~~~~~~~~~~~~~~~
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:file:`MyStruct.h`
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.. code-block:: c
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:linenos:
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struct my_struct {
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int a;
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int b;
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};
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:file:`MyStruct.py`
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.. code-block:: python
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:linenos:
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import ctypes
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class my_struct(ctypes.Structure):
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_fields_ = [("a", c_int),
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("b", c_int)]
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