1 files changed, 107 insertions, 0 deletions
diff --git a/support/zlib_macros.c b/support/zlib_macros.c
new file mode 100644
index 00000000000..69423f2339b
--- /dev/null
+++ b/support/zlib_macros.c
@@ -0,0 +1,107 @@
+/*
+ * Helper routines to use Zlib
+ *
+ * Author:
+ *   Christopher Lahey (clahey@ximian.co)
+ *
+ * (C) 2004 Novell, Inc.
+ */
+#include <zlib.h>
+#include <stdlib.h>
+
+z_stream *
+create_z_stream(int compress, unsigned char gzip)
+{
+	z_stream *z;
+	int retval;
+
+	z = malloc (sizeof (z_stream));
+	z->next_in = Z_NULL;
+	z->avail_in = 0;
+	z->next_out = Z_NULL;
+	z->avail_out = 0;
+	z->zalloc = Z_NULL;
+	z->zfree = Z_NULL;
+	z->opaque = NULL;
+	if (compress) {
+		retval = deflateInit2 (z, Z_DEFAULT_COMPRESSION, Z_DEFLATED, gzip ? 31 : -15, 8, Z_DEFAULT_STRATEGY);
+	} else {
+		retval = inflateInit2 (z, gzip ? 31 : -15);
+	}
+
+	if (retval == Z_OK)
+		return z;
+
+	free (z);
+	return NULL;
+}
+
+void
+free_z_stream(z_stream *z, int compress)
+{
+	if (compress) {
+		deflateEnd (z);
+	} else {
+		inflateEnd (z);
+	}
+	free (z);
+}
+
+void
+z_stream_set_next_in(z_stream *z, unsigned char *next_in)
+{
+	z->next_in = next_in;
+}
+
+void
+z_stream_set_avail_in(z_stream *z, int avail_in)
+{
+	z->avail_in = avail_in;
+}
+
+int
+z_stream_get_avail_in(z_stream *z)
+{
+	return z->avail_in;
+}
+
+void
+z_stream_set_next_out(z_stream *z, unsigned char *next_out)
+{
+	z->next_out = next_out;
+}
+
+void
+z_stream_set_avail_out(z_stream *z, int avail_out)
+{
+	z->avail_out = avail_out;
+}
+
+int
+z_stream_deflate (z_stream *z, int flush, unsigned char *next_out, int *avail_out)
+{
+	int ret_val;
+
+	z->next_out = next_out;
+	z->avail_out = *avail_out;
+
+	ret_val = deflate (z, flush);
+
+	*avail_out = z->avail_out;
+
+	return ret_val;
+}
+
+int
+z_stream_inflate (z_stream *z, int *avail_out)
+{
+	int ret_val;
+
+	z->avail_out = *avail_out;
+
+	ret_val = inflate (z, Z_NO_FLUSH);
+
+	*avail_out = z->avail_out;
+
+	return ret_val;
+}