1 files changed, 81 insertions, 0 deletions
diff --git a/usr.bin/mkuzip/mkuz_zlib.c b/usr.bin/mkuzip/mkuz_zlib.c
new file mode 100644
index 000000000000..57f6079c3c54
--- /dev/null
+++ b/usr.bin/mkuzip/mkuz_zlib.c
@@ -0,0 +1,81 @@
+/*
+ * Copyright (c) 2004-2016 Maxim Sobolev <sobomax@FreeBSD.org>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#include <sys/param.h>
+#include <err.h>
+#include <stdint.h>
+
+#include <zlib.h>
+
+#include "mkuzip.h"
+#include "mkuz_blk.h"
+#include "mkuz_zlib.h"
+
+struct mkuz_zlib {
+	int comp_level;
+};
+
+size_t
+mkuz_zlib_cbound(size_t blksz)
+{
+	return (compressBound(blksz));
+}
+
+void *
+mkuz_zlib_init(int *comp_level)
+{
+	struct mkuz_zlib *zp;
+
+	if (*comp_level == USE_DEFAULT_LEVEL)
+		*comp_level = Z_BEST_COMPRESSION;
+	if (*comp_level < Z_BEST_SPEED || *comp_level > Z_BEST_COMPRESSION)
+		errx(1, "provided compression level %d is invalid",
+		    *comp_level);
+		/* Not reached */
+
+	zp = mkuz_safe_zmalloc(sizeof(struct mkuz_zlib));
+	zp->comp_level = *comp_level;
+
+	return (zp);
+}
+
+void
+mkuz_zlib_compress(void *p, const struct mkuz_blk *iblk, struct mkuz_blk *oblk)
+{
+	uLongf destlen_z;
+	struct mkuz_zlib *zp;
+
+	zp = (struct mkuz_zlib *)p;
+
+	destlen_z = oblk->alen;
+	if (compress2(oblk->data, &destlen_z, iblk->data, iblk->info.len,
+	    zp->comp_level) != Z_OK) {
+		errx(1, "can't compress data: compress2() failed");
+		/* Not reached */
+	}
+
+	oblk->info.len = (uint32_t)destlen_z;
+}