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-rw-r--r--tests/iconvsupport.c39
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diff --git a/tests/iconvsupport.c b/tests/iconvsupport.c
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+/* Test iconv support.
+ Copyright (C) 2018 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <https://www.gnu.org/licenses/>. */
+
+#include <config.h>
+
+/* Specification. */
+extern int iconv_supports_encoding (const char *encoding);
+
+#if HAVE_ICONV
+# include <iconv.h>
+#endif
+
+/* Tests whether iconv() supports a given encoding. */
+int
+iconv_supports_encoding (const char *encoding)
+{
+#if HAVE_ICONV
+ iconv_t cd = iconv_open ("UTF-8", encoding);
+ if (cd != (iconv_t) -1)
+ {
+ iconv_close (cd);
+ return 1;
+ }
+#endif
+ return 0;
+}