Call a foreign-language function: Difference between revisions
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→{{header|Phix}}: added syntax colouring, marked p2js incompatible
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a library component which can be re-used in different applications.<br>
See also builtins/cffi.e, a text-based C interface that handles C-style structs, unions, and function declarations directly.
<!--<lang Phix>
<span style="color: #008080;">without</span> <span style="color: #008080;">js</span> <span style="color: #000080;font-style:italic;">-- not from a browser, mate!</span>
<span style="color: #008080;">constant</span> <span style="color: #000000;">shlwapi</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">open_dll</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"shlwapi.dll"</span><span style="color: #0000FF;">),</span>
<span style="color: #000000;">kernel32</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">open_dll</span><span style="color: #0000FF;">(</span><span style="color: #008000;">"kernel32.dll"</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">constant</span> <span style="color: #000000;">xStrDup</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">define_c_func</span><span style="color: #0000FF;">(</span><span style="color: #000000;">shlwapi</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"StrDupA"</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">C_PTR</span><span style="color: #0000FF;">},</span><span style="color: #000000;">C_PTR</span><span style="color: #0000FF;">),</span>
<span style="color: #000000;">xLocalFree</span> <span style="color: #0000FF;">=</span> <span style="color: #000000;">define_c_func</span><span style="color: #0000FF;">(</span><span style="color: #000000;">kernel32</span><span style="color: #0000FF;">,</span><span style="color: #008000;">"LocalFree"</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">C_PTR</span><span style="color: #0000FF;">},</span><span style="color: #000000;">C_PTR</span><span style="color: #0000FF;">)</span>
<span style="color: #008080;">constant</span> <span style="color: #000000;">HelloWorld</span> <span style="color: #0000FF;">=</span> <span style="color: #008000;">"Hello World!"</span>
<span style="color: #004080;">atom</span> <span style="color: #000000;">pMem</span> <span style="color: #0000FF;">=</span> <span style="color: #7060A8;">c_func</span><span style="color: #0000FF;">(</span><span style="color: #000000;">xStrDup</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">HelloWorld</span><span style="color: #0000FF;">})</span>
<span style="color: #0000FF;">?</span><span style="color: #7060A8;">peek_string</span><span style="color: #0000FF;">(</span><span style="color: #000000;">pMem</span><span style="color: #0000FF;">)</span>
<span style="color: #7060A8;">assert</span><span style="color: #0000FF;">(</span><span style="color: #7060A8;">c_func</span><span style="color: #0000FF;">(</span><span style="color: #000000;">xLocalFree</span><span style="color: #0000FF;">,{</span><span style="color: #000000;">pMem</span><span style="color: #0000FF;">})==</span><span style="color: #004600;">NULL</span><span style="color: #0000FF;">)</span>
<!--</lang>-->
{{out}}
<pre>
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