* Sherlock Library -- Fast Buffered I/O
*
* (c) 1997--2000 Martin Mares <mj@ucw.cz>
+ *
+ * This software may be freely distributed and used according to the terms
+ * of the GNU Lesser General Public License.
*/
-#include <stdio.h>
-#include <stdlib.h>
-
#include "lib/lib.h"
#include "lib/fastbuf.h"
+#include <stdio.h>
+#include <stdlib.h>
+
void bclose(struct fastbuf *f)
{
- bflush(f);
- f->close(f);
- free(f);
+ if (f)
+ {
+ bflush(f);
+ f->close(f);
+ xfree(f);
+ }
}
void bflush(struct fastbuf *f)
return *f->bptr;
}
-void bputc_slow(struct fastbuf *f, byte c)
+void bputc_slow(struct fastbuf *f, uns c)
{
if (f->bptr >= f->bufend)
f->spout(f);
*f->bptr++ = c;
}
-word bgetw_slow(struct fastbuf *f)
+int bgetw_slow(struct fastbuf *f)
{
- word w = bgetc_slow(f);
+ int w1, w2;
+ w1 = bgetc_slow(f);
+ if (w1 < 0)
+ return w1;
+ w2 = bgetc_slow(f);
+ if (w2 < 0)
+ return w2;
#ifdef CPU_BIG_ENDIAN
- return (w << 8) | bgetc_slow(f);
+ return (w1 << 8) | w2;
#else
- return w | (bgetc_slow(f) << 8);
+ return w1 | (w2 << 8);
#endif
}
return ((u64) h << 32) | l;
}
-void bputw_slow(struct fastbuf *f, word w)
+void bputw_slow(struct fastbuf *f, uns w)
{
#ifdef CPU_BIG_ENDIAN
bputc_slow(f, w >> 8);
#endif
}
-void bread_slow(struct fastbuf *f, void *b, uns l)
+uns bread_slow(struct fastbuf *f, void *b, uns l, uns check)
{
+ uns total = 0;
while (l)
{
uns k = f->bstop - f->bptr;
f->refill(f);
k = f->bstop - f->bptr;
if (!k)
- die("bread on %s: file exhausted", f->name);
+ break;
}
if (k > l)
k = l;
f->bptr += k;
b = (byte *)b + k;
l -= k;
+ total += k;
}
+ if (check && total && l)
+ die("breadb: short read");
+ return total;
}
void bwrite_slow(struct fastbuf *f, void *b, uns l)
}
die("%s: Line too long", f->name);
}
+
+byte *
+bgets0(struct fastbuf *f, byte *b, uns l)
+{
+ byte *e = b + l - 1;
+ int k;
+
+ k = bgetc(f);
+ if (k == EOF)
+ return NULL;
+ while (b < e)
+ {
+ if (!k || k == EOF)
+ {
+ *b = 0;
+ return b;
+ }
+ *b++ = k;
+ k = bgetc(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)
+{
+ f->bptr = pos;
+}
+
+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;
+}
+
+void
+bdirect_write_commit(struct fastbuf *f, byte *pos)
+{
+ f->bptr = pos;
+}