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#ifndef IO_H
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#define IO_H
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/* http://cr.yp.to/lib/io.html */
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#include "uint64.h"
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#include "taia.h"
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/* like open(s,O_RDONLY) */
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int io_readfile(int64* d,const char* s);
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/* like open(s,O_WRONLY|O_TRUNC,0600) */
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int io_createfile(int64* d,const char* s);
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/* like pipe(d) */
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int io_pipe(int64* d);
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/* non-blocking read(), -1 for EAGAIN and -3+errno for other errors */
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int64 io_tryread(int64 d,char* buf,int64 len);
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/* blocking read(), with -3 instead of -1 for errors */
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int64 io_waitread(int64 d,char* buf,int64 len);
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/* non-blocking write(), -1 for EAGAIN and -3+errno for other errors */
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int64 io_trywrite(int64 d,const char* buf,int64 len);
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/* blocking write(), with -3 instead of -1 for errors */
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int64 io_waitwrite(int64 d,const char* buf,int64 len);
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/* modify timeout attribute of file descriptor */
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void io_timeout(int64 d,tai6464 t);
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/* like io_tryread but will return -2,errno=ETIMEDOUT if d has a timeout
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* associated and it is passed without input being there */
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int64 io_tryreadtimeout(int64 d,char* buf,int64 len);
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/* like io_trywrite but will return -2,errno=ETIMEDOUT if d has a timeout
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* associated and it is passed without being able to write */
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int64 io_trywritetimeout(int64 d,const char* buf,int64 len);
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void io_wantread(int64 d);
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void io_wantwrite(int64 d);
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void io_dontwantread(int64 d);
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void io_dontwantwrite(int64 d);
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void io_wait();
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void io_waituntil(tai6464 t);
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void io_check();
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/* return next descriptor from io_wait that can be read from */
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int64 io_canread();
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/* return next descriptor from io_wait that can be written to */
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int64 io_canwrite();
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/* return next descriptor with expired timeout */
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int64 io_timeouted();
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/* put d on internal data structure, return 1 on success, 0 on error */
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int io_fd(int64 d);
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/* put descriptor in non-blocking mode */
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void io_nonblock(int64 d);
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/* put descriptor in close-on-exec mode */
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void io_closeonexec(int64 d);
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void io_close(int64 d);
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/* send n bytes from file fd starting at offset off to socket s */
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/* return number of bytes written */
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int64 io_sendfile(int64 s,int64 fd,uint64 off,uint64 n);
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#endif
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