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<section id="api-exported-by-pygame-rwobject">
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<section id="src-c-rwobject-c">
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<h2>src_c/rwobject.c<a class="headerlink" href="#src-c-rwobject-c" title="Permalink to this heading">¶</a></h2>
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<p>This extension module implements functions for wrapping a Python file like
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object in a <code class="xref c c-type docutils literal notranslate"><span class="pre">SDL_RWops</span></code> struct for SDL file access.</p>
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<p>Header file: src_c/include/pygame.h</p>
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<dl class="c function">
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<dt class="sig sig-object c" id="c.pgRWops_FromObject">
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<span class="n"><span class="pre">SDL_RWops</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="sig-name descname"><span class="n"><span class="pre">pgRWops_FromObject</span></span></span><span class="sig-paren">(</span><span class="n"><span class="pre">PyObject</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">obj</span></span>, <span class="kt"><span class="pre">char</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">extptr</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.pgRWops_FromObject" title="Permalink to this definition">¶</a><br /></dt>
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<dd><p>Return a SDL_RWops struct filled to access <em>obj</em>.
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If <em>obj</em> is a string then let SDL open the file it names.
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Otherwise, if <em>obj</em> is a Python file-like object then use its <code class="docutils literal notranslate"><span class="pre">read</span></code>, <code class="docutils literal notranslate"><span class="pre">write</span></code>,
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<code class="docutils literal notranslate"><span class="pre">seek</span></code>, <code class="docutils literal notranslate"><span class="pre">tell</span></code>, and <code class="docutils literal notranslate"><span class="pre">close</span></code> methods. If threads are available,
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the Python GIL is acquired before calling any of the <em>obj</em> methods.
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If you want to see the file extension, you can pass in a char double pointer
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that will be populated to a dynamically allocated string or NULL. Caller is
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responsible for freeing the extension string. It is safe to pass NULL if you
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don't care about the file extension. On error raise a Python exception and
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return <code class="docutils literal notranslate"><span class="pre">NULL</span></code>. If NULL is returned, the extptr will not be populated with
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dynamic memory, it is not necessary to free in that error handling.</p>
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</dd></dl>
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<dl class="c function">
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<dt class="sig sig-object c" id="c.pgRWops_FromFileObject">
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<span class="n"><span class="pre">SDL_RWops</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="sig-name descname"><span class="n"><span class="pre">pgRWops_FromFileObject</span></span></span><span class="sig-paren">(</span><span class="n"><span class="pre">PyObject</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">obj</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.pgRWops_FromFileObject" title="Permalink to this definition">¶</a><br /></dt>
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<dd><p>Return a SDL_RWops struct filled to access the Python file-like object <em>obj</em>.
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Uses its <code class="docutils literal notranslate"><span class="pre">read</span></code>, <code class="docutils literal notranslate"><span class="pre">write</span></code>, <code class="docutils literal notranslate"><span class="pre">seek</span></code>, <code class="docutils literal notranslate"><span class="pre">tell</span></code>, and <code class="docutils literal notranslate"><span class="pre">close</span></code> methods.
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If threads are available, the Python GIL is acquired before calling any of the <em>obj</em> methods.
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On error raise a Python exception and return <code class="docutils literal notranslate"><span class="pre">NULL</span></code>.</p>
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</dd></dl>
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<dl class="c function">
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<dt class="sig sig-object c" id="c.pgRWops_IsFileObject">
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<span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">pgRWops_IsFileObject</span></span></span><span class="sig-paren">(</span><span class="n"><span class="pre">SDL_RWops</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">rw</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.pgRWops_IsFileObject" title="Permalink to this definition">¶</a><br /></dt>
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<dd><p>Return true if <em>rw</em> is a Python file-like object wrapper returned by <a class="reference internal" href="#c.pgRWops_FromObject" title="pgRWops_FromObject"><code class="xref c c-func docutils literal notranslate"><span class="pre">pgRWops_FromObject()</span></code></a>
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or <a class="reference internal" href="#c.pgRWops_FromFileObject" title="pgRWops_FromFileObject"><code class="xref c c-func docutils literal notranslate"><span class="pre">pgRWops_FromFileObject()</span></code></a>.</p>
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</dd></dl>
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<dl class="c function">
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<dt class="sig sig-object c" id="c.pgRWops_ReleaseObject">
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<span class="kt"><span class="pre">int</span></span><span class="w"> </span><span class="sig-name descname"><span class="n"><span class="pre">pgRWops_ReleaseObject</span></span></span><span class="sig-paren">(</span><span class="n"><span class="pre">SDL_RWops</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">context</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.pgRWops_ReleaseObject" title="Permalink to this definition">¶</a><br /></dt>
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<dd><p>Free a SDL_RWops struct. If it is attached to a Python file-like object, decrement its
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refcount. Otherwise, close the file handle.
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Return 0 on success. On error, raise a Python exception and return a negative value.</p>
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</dd></dl>
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<dl class="c function">
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<dt class="sig sig-object c" id="c.pg_EncodeFilePath">
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<span class="n"><span class="pre">PyObject</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="sig-name descname"><span class="n"><span class="pre">pg_EncodeFilePath</span></span></span><span class="sig-paren">(</span><span class="n"><span class="pre">PyObject</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">obj</span></span>, <span class="n"><span class="pre">PyObject</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">eclass</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.pg_EncodeFilePath" title="Permalink to this definition">¶</a><br /></dt>
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<dd><p>Return the file path <em>obj</em> as a byte string properly encoded for the OS.
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Null bytes are forbidden in the encoded file path.
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On error raise a Python exception and return <code class="docutils literal notranslate"><span class="pre">NULL</span></code>,
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using <em>eclass</em> as the exception type if it is not <code class="docutils literal notranslate"><span class="pre">NULL</span></code>.
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If <em>obj</em> is <code class="docutils literal notranslate"><span class="pre">NULL</span></code> assume an exception was already raised and pass it on.</p>
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</dd></dl>
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<dl class="c function">
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<dt class="sig sig-object c" id="c.pg_EncodeString">
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<span class="n"><span class="pre">PyObject</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="sig-name descname"><span class="n"><span class="pre">pg_EncodeString</span></span></span><span class="sig-paren">(</span><span class="n"><span class="pre">PyObject</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">obj</span></span>, <span class="k"><span class="pre">const</span></span><span class="w"> </span><span class="kt"><span class="pre">char</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">encoding</span></span>, <span class="k"><span class="pre">const</span></span><span class="w"> </span><span class="kt"><span class="pre">char</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">errors</span></span>, <span class="n"><span class="pre">PyObject</span></span><span class="w"> </span><span class="p"><span class="pre">*</span></span><span class="n"><span class="pre">eclass</span></span><span class="sig-paren">)</span><a class="headerlink" href="#c.pg_EncodeString" title="Permalink to this definition">¶</a><br /></dt>
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<dd><p>Return string <em>obj</em> as an encoded byte string.
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The C string arguments <em>encoding</em> and <em>errors</em> are the same as for
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<code class="xref c c-func docutils literal notranslate"><span class="pre">PyUnicode_AsEncodedString()</span></code>.
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On error raise a Python exception and return <code class="docutils literal notranslate"><span class="pre">NULL</span></code>,
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using <em>eclass</em> as the exception type if it is not <code class="docutils literal notranslate"><span class="pre">NULL</span></code>.
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If <em>obj</em> is <code class="docutils literal notranslate"><span class="pre">NULL</span></code> assume an exception was already raised and pass it on.</p>
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</dd></dl>
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</section>
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