#include "lib/lib.h"
#include "lib/fastbuf.h"
-#include <stdio.h>
#include <stdlib.h>
void bclose(struct fastbuf *f)
if (f)
{
bflush(f);
- f->close(f);
- xfree(f);
+ if (f->close)
+ f->close(f);
}
}
void bflush(struct fastbuf *f)
{
- if (f->bptr != f->buffer)
- { /* Have something to flush */
- if (f->bstop > f->buffer) /* Read data? */
- {
- f->bptr = f->bstop = f->buffer;
- f->pos = f->fdpos;
- }
- else /* Write data... */
- f->spout(f);
- }
+ if (f->bptr > f->bstop)
+ f->spout(f);
+ else if (f->bstop > f->buffer)
+ f->bptr = f->bstop = f->buffer;
}
inline void bsetpos(struct fastbuf *f, sh_off_t pos)
{
- if (pos >= f->pos && (pos <= f->pos + (f->bptr - f->buffer) || pos <= f->pos + (f->bstop - f->buffer)))
- f->bptr = f->buffer + (pos - f->pos);
+ /* We can optimize seeks only when reading */
+ if (pos >= f->pos - (f->bstop - f->buffer) && pos <= f->pos)
+ f->bptr = f->bstop + (pos - f->pos);
else
{
bflush(f);
die("%s: Line too long", f->name);
}
-int
-bdirect_read_prepare(struct fastbuf *f, byte **buf)
-{
- int len;
-
- if (f->bptr == f->bstop && !f->refill(f))
- return EOF;
- *buf = f->bptr;
- len = f->bstop - f->bptr;
- return len;
-}
-
void
-bdirect_read_commit(struct fastbuf *f, byte *pos)
+bbcopy_slow(struct fastbuf *f, struct fastbuf *t, uns l)
{
- f->bptr = pos;
-}
+ while (l)
+ {
+ byte *fptr, *tptr;
+ uns favail, tavail, n;
-int
-bdirect_write_prepare(struct fastbuf *f, byte **buf)
-{
- if (f->bptr == f->bufend)
- f->spout(f);
- *buf = f->bptr;
- return f->bufend - f->bptr;
+ favail = bdirect_read_prepare(f, &fptr);
+ if (!favail)
+ 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);
+ l -= n;
+ }
}
-void
-bdirect_write_commit(struct fastbuf *f, byte *pos)
+int
+bconfig(struct fastbuf *f, uns item, int value)
{
- f->bptr = pos;
+ return f->config ? f->config(f, item, value) : -1;
}