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-rw-r--r--lib/compat/compat-zlib.h41
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diff --git a/lib/compat/compat-zlib.h b/lib/compat/compat-zlib.h
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+/*
+ * libcompat - system compatibility library
+ * compat-zlib.h - zlib compatibility declarations
+ *
+ * Copyright © 2021 Guillem Jover <guillem@debian.org>
+ *
+ * This 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 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This 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/>.
+ */
+
+#ifndef COMPAT_ZLIB_H
+#define COMPAT_ZLIB_H
+
+#if USE_LIBZ_IMPL == USE_LIBZ_IMPL_ZLIB_NG
+#include <zlib-ng.h>
+#elif USE_LIBZ_IMPL == USE_LIBZ_IMPL_ZLIB
+#include <zlib.h>
+#endif
+
+#if USE_LIBZ_IMPL == USE_LIBZ_IMPL_ZLIB_NG
+/* Compatibility symbols for zlib-ng. */
+#define gzdopen zng_gzdopen
+#define gzopen zng_gzopen
+#define gzread zng_gzread
+#define gzwrite zng_gzwrite
+#define gzerror zng_gzerror
+#define gzclose zng_gzclose
+#define zError zng_zError
+#endif
+
+#endif /* COMPAT_ZLIB_H */