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#include "internal.h"
intptr
bio·write(io·Header *io, intptr len, void *buf)
{
char *b;
intptr c, o, nw, n;
b = buf;
c = len;
o = io->olen;
while(c > 0){
n = -o;
if(n > c)
n = c;
if(n == 0){
if(io->state != io·BufWtr)
return io·BufEof;
switch(sys·write(io->fd, io->cap, io->b, &nw)){
case 0:
if(nw != io->cap) goto error;
io->pos += nw;
o = -io->cap;
continue;
case sys·ErrorInterrupt:
io->state = io·BufNil;
/* fallthrough */
default: error:
return io·BufEof;
}
}
mem·move(io->e+o, b, n);
o += n;
c -= n;
b += n;
}
io->olen = o;
return len-c;
}
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