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#ifndef _CHUNK_H_
#define _CHUNK_H_
#include "buffer.h"
#include "array.h"
typedef struct chunk {
enum { UNUSED_CHUNK, MEM_CHUNK, FILE_CHUNK } type;
buffer *mem; /* either the storage of the mem-chunk or the read-ahead buffer */
struct {
/* filechunk */
buffer *name; /* name of the file */
off_t start; /* starting offset in the file */
off_t length; /* octets to send from the starting offset */
int fd;
struct {
char *start; /* the start pointer of the mmap'ed area */
size_t length; /* size of the mmap'ed area */
off_t offset; /* start is <n> octet away from the start of the file */
} mmap;
int is_temp; /* file is temporary and will be deleted if on cleanup */
} file;
off_t offset; /* octets sent from this chunk
the size of the chunk is either
- mem-chunk: mem->used - 1
- file-chunk: file.length
*/
struct chunk *next;
} chunk;
typedef struct {
chunk *first;
chunk *last;
chunk *unused;
size_t unused_chunks;
array *tempdirs;
off_t bytes_in, bytes_out;
} chunkqueue;
chunkqueue *chunkqueue_init(void);
int chunkqueue_set_tempdirs(chunkqueue *c, array *tempdirs);
int chunkqueue_append_file(chunkqueue *c, buffer *fn, off_t offset, off_t len);
int chunkqueue_append_mem(chunkqueue *c, const char *mem, size_t len);
int chunkqueue_append_buffer(chunkqueue *c, buffer *mem);
int chunkqueue_append_buffer_weak(chunkqueue *c, buffer *mem);
int chunkqueue_prepend_buffer(chunkqueue *c, buffer *mem);
buffer * chunkqueue_get_append_buffer(chunkqueue *c);
buffer * chunkqueue_get_prepend_buffer(chunkqueue *c);
chunk * chunkqueue_get_append_tempfile(chunkqueue *cq);
int chunkqueue_remove_finished_chunks(chunkqueue *cq);
off_t chunkqueue_length(chunkqueue *c);
off_t chunkqueue_written(chunkqueue *c);
void chunkqueue_free(chunkqueue *c);
void chunkqueue_reset(chunkqueue *c);
int chunkqueue_is_empty(chunkqueue *c);
#endif
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