+ k = bgetc(f);
+ if (k < 0)
+ return 0;
+ while (b < e)
+ {
+ if (k == '\n' || k < 0)
+ {
+ *b++ = 0;
+ return b - start;
+ }
+ *b++ = k;
+ k = bgetc(f);
+ }
+ return -1;
+}
+
+byte *
+bgets0(struct fastbuf *f, byte *b, uns l)
+{
+ byte *e = b + l - 1;
+ int k;
+
+ k = bgetc(f);
+ if (k < 0)
+ return NULL;
+ while (b < e)
+ {
+ if (k <= 0)
+ {
+ *b = 0;
+ return b;
+ }
+ *b++ = k;
+ k = bgetc(f);
+ }
+ die("%s: Line too long", f->name);
+}
+
+void
+bbcopy_slow(struct fastbuf *f, struct fastbuf *t, uns l)
+{
+ while (l)
+ {
+ byte *fptr, *tptr;
+ uns favail, tavail, n;
+
+ favail = bdirect_read_prepare(f, &fptr);
+ if (!favail)
+ {
+ if (l == ~0U)
+ return;
+ die("bbcopy: source exhausted");
+ }
+ tavail = bdirect_write_prepare(t, &tptr);
+ n = MIN(l, favail);
+ n = MIN(n, tavail);
+ memcpy(tptr, fptr, n);
+ bdirect_read_commit(f, fptr + n);
+ bdirect_write_commit(t, tptr + n);
+ if (l != ~0U)
+ l -= n;
+ }