replace ec3_reader and ec3_writer with a unified image and tag io interface

src/pipeline.h

@@ -1,7 +1,6 @@
 #ifndef PIPELINE_H_
 #define PIPELINE_H_
 
-#include "cluster.h"
 #include "status.h"
 
 #include <blue/core/queue.h>
@@ -54,17 +53,7 @@ struct ec3_pipeline_stage_args {
 };
 
 struct ec3_pipeline {
-	FILE *p_target;
-	size_t p_target_base_offset;
-
 	size_t p_cluster_size;
-	unsigned int p_cluster_flags;
-	struct cluster_table p_cluster_table;
-
-	size_t p_next_cluster_id;
-	size_t p_data_offset;
-
-	void *p_read_buf;
 	b_queue p_stages;
 };
 
@@ -72,30 +61,31 @@ extern enum ec3_status ec3_pipeline_create(
 	struct ec3_pipeline_stage_args stages[],
 	size_t nr_stages,
 	size_t cluster_size,
-	FILE *target,
-	size_t target_base_offset,
-	FILE *cluster_table,
-	size_t cluster_table_base_offset,
 	struct ec3_pipeline **out);
 extern void ec3_pipeline_destroy(struct ec3_pipeline *p);
 
-extern enum ec3_status ec3_pipeline_write_cluster(
+extern enum ec3_status ec3_pipeline_encode_cluster(
 	struct ec3_pipeline *pipeline,
-	void *p,
-	size_t len,
-	size_t *bytes_written);
-extern enum ec3_status ec3_pipeline_read_cluster(
+	void *in,
+	size_t in_len,
+	void *out,
+	size_t out_max,
+	size_t *out_len);
+extern enum ec3_status ec3_pipeline_decode_cluster(
 	struct ec3_pipeline *pipeline,
-	void *p,
-	size_t cluster_id,
-	size_t *nr_read);
+	void *in,
+	size_t in_len,
+	void *out,
+	size_t out_max,
+	size_t *out_len);
 
+#if 0
 extern enum ec3_status ec3_pipeline_copy_all(
 	struct ec3_pipeline *dest,
 	struct cluster_table *clusters,
 	FILE *data);
+#endif
 
-extern size_t ec3_get_cluster_size(unsigned int v);
 extern enum ec3_pipeline_stage_type_id
 ec3_get_pipeline_stage_for_encryption_func(unsigned int func);
 extern enum ec3_pipeline_stage_type_id