+#define LIZARD_NEEDS_CHARS 8
+ /* The compression routine needs input buffer 8 characters longer, because it
+ * does not check the input bounds all the time. */
+#define LIZARD_MAX_MULTIPLY 23./22
+#define LIZARD_MAX_ADD 4
+ /* In the worst case, the compressed file will not be longer than its
+ * original length * 23/22 + 4.
+ *
+ * The additive constant is for EOF and the header of the file.
+ *
+ * The multiplicative constant comes from 19-byte incompressible string
+ * followed by a 3-sequence that can be compressed into 2-byte link. This
+ * breaks the copy-mode and it needs to be restarted with a new header. The
+ * total length is 2(header) + 19(string) + 2(link) = 23.
+ */
+
+/* lizard.c */
+int lizard_compress(const byte *in, uns in_len, byte *out);
+int lizard_decompress(const byte *in, byte *out);
+
+/* lizard-safe.c */
+struct lizard_buffer;
+
+struct lizard_buffer *lizard_alloc(void);
+void lizard_free(struct lizard_buffer *buf);
+byte *lizard_decompress_safe(const byte *in, struct lizard_buffer *buf, uns expected_length);
+
+/* adler32.c */
+uns update_adler32(uns adler, const byte *ptr, uns len);
+
+static inline uns
+adler32(const byte *buf, uns len)
+{
+ return update_adler32(1, buf, len);
+}
+
+#endif