46 lines
748 B
C
46 lines
748 B
C
#include <u.h>
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#include <libc.h>
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#include <bio.h>
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long
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Bwrite(Biobufhdr *bp, void *ap, long count)
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{
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long c;
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uchar *p;
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int i, n, oc;
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char errbuf[ERRMAX];
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p = ap;
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c = count;
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oc = bp->ocount;
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while(c > 0) {
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n = -oc;
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if(n > c)
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n = c;
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if(n == 0) {
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if(bp->state != Bwactive)
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return Beof;
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i = bp->iof(bp, bp->bbuf, bp->bsize);
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if(i != bp->bsize) {
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errstr(errbuf, sizeof errbuf);
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if(strstr(errbuf, "interrupt") == nil) {
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bp->state = Binactive;
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Berror(bp, "write error: %s", errbuf);
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}
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errstr(errbuf, sizeof errbuf);
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return Beof;
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}
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bp->offset += i;
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oc = -bp->bsize;
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continue;
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}
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memmove(bp->ebuf+oc, p, n);
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oc += n;
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c -= n;
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p += n;
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}
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bp->ocount = oc;
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return count-c;
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}
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