Exposed part of the API.

src/excit.c

 #include <stdlib.h>
 #include <excit.h>
 
-struct excit_func_table_s {
-	int (*alloc)(excit_t data);
-	void (*free)(excit_t data);
-	int (*copy)(excit_t dst, const excit_t src);
-	int (*next)(excit_t data, ssize_t *indexes);
-	int (*peek)(const excit_t data, ssize_t *indexes);
-	int (*size)(const excit_t data, ssize_t *size);
-	int (*rewind)(excit_t data);
-	int (*split)(const excit_t data, ssize_t n, excit_t *results);
-	int (*nth)(const excit_t data, ssize_t n, ssize_t *indexes);
-	int (*n)(const excit_t data, const ssize_t *indexes, ssize_t *n);
-	int (*pos)(const excit_t it, ssize_t *n);
-};
-
-struct excit_s {
-	const struct excit_func_table_s *functions;
-	ssize_t dimension;
-	enum excit_type_e type;
-	void *data;
-};
-
 /*--------------------------------------------------------------------*/
 
 struct slice_it_s {

src/excit.h

@@ -17,10 +17,30 @@ enum excit_error_e {
 	EXCIT_EINVAL,
 	EXCIT_EDOM,
 	EXCIT_ENOTSUP
+
+struct excit_s {
+	const struct excit_func_table_s *functions;
+	ssize_t dimension;
+	enum excit_type_e type;
+	void *data;
 };
 
 typedef struct excit_s *excit_t;
 
+struct excit_func_table_s {
+	int (*alloc)(excit_t it);
+	void (*free)(excit_t it);
+	int (*copy)(excit_t dst_it, const excit_t src_it);
+	int (*next)(excit_t it, ssize_t *indexes);
+	int (*peek)(const excit_t it, ssize_t *indexes);
+	int (*size)(const excit_t it, ssize_t *size);
+	int (*rewind)(excit_t it);
+	int (*split)(const excit_t it, ssize_t n, excit_t *results);
+	int (*nth)(const excit_t it, ssize_t n, ssize_t *indexes);
+	int (*n)(const excit_t it, const ssize_t *indexes, ssize_t *n);
+	int (*pos)(const excit_t it, ssize_t *n);
+};
+
 excit_t excit_alloc(enum excit_type_e type);
 excit_t excit_dup(const excit_t it);
 void excit_free(excit_t it);