Add MariaDB Connector/C as a built-in alternative (v3.2.3).

vendor/MDBC/win-iconv/mlang.h

@@ -0,0 +1,54 @@
+HRESULT WINAPI ConvertINetString(
+    LPDWORD lpdwMode,
+    DWORD dwSrcEncoding,
+    DWORD dwDstEncoding,
+    LPCSTR lpSrcStr,
+    LPINT lpnSrcSize,
+    LPBYTE lpDstStr,
+    LPINT lpnDstSize
+);
+
+HRESULT WINAPI ConvertINetMultiByteToUnicode(
+    LPDWORD lpdwMode,
+    DWORD dwSrcEncoding,
+    LPCSTR lpSrcStr,
+    LPINT lpnMultiCharCount,
+    LPWSTR lpDstStr,
+    LPINT lpnWideCharCount
+);
+
+HRESULT WINAPI ConvertINetUnicodeToMultiByte(
+    LPDWORD lpdwMode,
+    DWORD dwEncoding,
+    LPCWSTR lpSrcStr,
+    LPINT lpnWideCharCount,
+    LPSTR lpDstStr,
+    LPINT lpnMultiCharCount
+);
+
+HRESULT WINAPI IsConvertINetStringAvailable(
+    DWORD dwSrcEncoding,
+    DWORD dwDstEncoding
+);
+
+HRESULT WINAPI LcidToRfc1766A(
+    LCID Locale,
+    LPSTR pszRfc1766,
+    int nChar
+);
+
+HRESULT WINAPI LcidToRfc1766W(
+    LCID Locale,
+    LPWSTR pszRfc1766,
+    int nChar
+);
+
+HRESULT WINAPI Rfc1766ToLcidA(
+    LCID *pLocale,
+    LPSTR pszRfc1766
+);
+
+HRESULT WINAPI Rfc1766ToLcidW(
+    LCID *pLocale,
+    LPWSTR pszRfc1766
+);