document the new test image functions
[imager.git] / iolayer.h
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1#ifndef _IOLAYER_H_
2#define _IOLAYER_H_
3
4
5/* How the IO layer works:
6 *
7 * Start by getting an io_glue object. Then define its
8 * datasource via io_obj_setp_buffer or io_obj_setp_cb. Before
9 * using the io_glue object be sure to call io_glue_commit_types().
10 * After that data can be read via the io_glue->readcb() method.
11 *
12 */
13
14
15#include "iolayert.h"
16
17/* #define BBSIZ 1096 */
18#define BBSIZ 16384
19#define IO_FAKE_SEEK 1<<0L
20#define IO_TEMP_SEEK 1<<1L
21
22
23void io_glue_commit_types(io_glue *ig);
24void io_glue_gettypes (io_glue *ig, int reqmeth);
25
26/* XS functions */
27io_glue *io_new_fd(int fd);
28io_glue *io_new_bufchain(void);
29io_glue *io_new_buffer(char *data, size_t len, i_io_closebufp_t closecb, void *closedata);
30io_glue *io_new_cb(void *p, i_io_readl_t readcb, i_io_writel_t writecb, i_io_seekl_t seekcb, i_io_closel_t closecb, i_io_destroyl_t destroycb);
31size_t io_slurp(io_glue *ig, unsigned char **c);
32void io_glue_destroy(io_glue *ig);
33
34#endif /* _IOLAYER_H_ */