ref: c11957a7915d355d80ff7e6a21721ba05441ca29
dir: /libbio/bwrite.c/
#include "lib9.h" #include <bio.h> long Bwrite(Biobuf *bp, void *ap, long count) { long c; uchar *p; int i, n, oc; char errbuf[ERRMAX]; p = ap; c = count; oc = bp->ocount; while(c > 0) { n = -oc; if(n > c) n = c; if(n == 0) { if(bp->state != Bwactive) return Beof; i = write(bp->fid, bp->bbuf, bp->bsize); if(i != bp->bsize) { errstr(errbuf, sizeof errbuf); if(strstr(errbuf, "interrupt") == nil) bp->state = Binactive; errstr(errbuf, sizeof errbuf); return Beof; } bp->offset += i; oc = -bp->bsize; continue; } memmove(bp->ebuf+oc, p, n); oc += n; c -= n; p += n; } bp->ocount = oc; return count-c; }