add github action for CI on OS X
[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 by calling the appropriate
8 * io_new...() function. After that data can be read via the
9 * io_glue->readcb() method.
10 *
11 */
12
13
14#include "iolayert.h"
15
16/* #define BBSIZ 1096 */
17#define BBSIZ 16384
18#define IO_FAKE_SEEK 1<<0L
19#define IO_TEMP_SEEK 1<<1L
20
21
22void io_glue_gettypes (io_glue *ig, int reqmeth);
23
24/* XS functions */
25io_glue *im_io_new_fd(pIMCTX, int fd);
26io_glue *im_io_new_bufchain(pIMCTX);
27io_glue *im_io_new_buffer(pIMCTX, const char *data, size_t len, i_io_closebufp_t closecb, void *closedata);
28io_glue *im_io_new_cb(pIMCTX, 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);
29size_t io_slurp(io_glue *ig, unsigned char **c);
30void io_glue_destroy(io_glue *ig);
31
32void i_io_dump(io_glue *ig, int flags);
33
34/* Buffered I/O */
35extern int i_io_getc_imp(io_glue *ig);
36extern int i_io_peekc_imp(io_glue *ig);
37extern ssize_t i_io_peekn(io_glue *ig, void *buf, size_t size);
38extern int i_io_putc_imp(io_glue *ig, int c);
39extern ssize_t i_io_read(io_glue *ig, void *buf, size_t size);
40extern ssize_t i_io_write(io_glue *ig, const void *buf, size_t size);
41extern off_t i_io_seek(io_glue *ig, off_t offset, int whence);
42extern int i_io_flush(io_glue *ig);
43extern int i_io_close(io_glue *ig);
44extern int i_io_set_buffered(io_glue *ig, int buffered);
45extern ssize_t i_io_gets(io_glue *ig, char *, size_t, int);
46
47#endif /* _IOLAYER_H_ */