Add support for md4c (#1026)

data/supported-extensions

@@ -52,6 +52,7 @@ lzf 5.5 5.6 7.0 7.1 7.2 7.3 7.4 8.0 8.1 8.2 8.3 8.4
 mailparse 5.5 5.6 7.0 7.1 7.2 7.3 7.4 8.0 8.1 8.2 8.3 8.4
 maxminddb 7.2 7.3 7.4 8.0 8.1 8.2 8.3 8.4
 mcrypt 5.5 5.6 7.0 7.1 7.2 7.3 7.4 8.0 8.1 8.2 8.3
+md4c 8.0 8.1 8.2 8.3 8.4
 memcache 5.5 5.6 7.0 7.1 7.2 7.3 7.4 8.0 8.1 8.2 8.3 8.4
 memcached 5.5 5.6 7.0 7.1 7.2 7.3 7.4 8.0 8.1 8.2 8.3 8.4
 memprof 5.5 5.6 7.0 7.1 7.2 7.3 7.4 8.0 8.1 8.2 8.3 8.4

scripts/tests/md4c

@@ -0,0 +1,27 @@
+#!/usr/bin/env php
+<?php
+
+require_once __DIR__ . '/_bootstrap.php';
+
+if (!function_exists('md4c_toHtml')) {
+    fwrite(STDERR, "The function md4c_toHtml() does not exist\n");
+    exit(1);
+}
+
+$input = "# Test\n";
+$expected = "<h1>Test</h1>\n";
+$actual = md4c_toHtml($input);
+
+if ($actual !== $expected) {
+    fwrite(
+        STDERR,
+        <<<EOT
+Failed to convert {$input}
+Expected: {$expected}
+Actual  : {$actual}
+
+EOT
+    );
+    exit(1);
+}
+echo "md4c_toHtml() works just fine.\n";