Created a header which will contain description of all data structures

[libucw.git] / lib / fastbuf.h

diff --git a/lib/fastbuf.h b/lib/fastbuf.h
index c62ed4cd470cf2af754ce50b46ee398cfbffb2a3..f1f0239ae8dac3177855a5919502d287e823353f 100644 (file)
--- a/lib/fastbuf.h
+++ b/lib/fastbuf.h
@@ -4,6 +4,9 @@
  *     (c) 1997--2000 Martin Mares <mj@ucw.cz>
  */
 
+#ifndef _SHERLOCK_FASTBUF_H
+#define _SHERLOCK_FASTBUF_H
+
 #ifndef EOF
 #include <stdio.h>
 #endif
@@ -264,16 +267,17 @@ static inline void bput5(struct fastbuf *f, u64 l)
     bput5_slow(f, l);
 }
 
-void bread_slow(struct fastbuf *f, void *b, uns l);
-static inline void bread(struct fastbuf *f, void *b, uns l)
+uns bread_slow(struct fastbuf *f, void *b, uns l);
+static inline uns bread(struct fastbuf *f, void *b, uns l)
 {
   if (f->bptr + l <= f->bstop)
     {
       memcpy(b, f->bptr, l);
       f->bptr += l;
+      return l;
     }
   else
-    bread_slow(f, b, l);
+    return bread_slow(f, b, l);
 }
 
 void bwrite_slow(struct fastbuf *f, void *b, uns l);
@@ -303,6 +307,12 @@ bputsn(struct fastbuf *f, byte *b)
   bputc(f, '\n');
 }
 
+/* Direct I/O on buffers */
+
+int bdirect_read(struct fastbuf *f, byte **buf);
+int bdirect_write_prepare(struct fastbuf *f, byte **buf);
+void bdirect_write_commit(struct fastbuf *f, byte *pos);
+
 /* Depending on compile-time configuration, we select the right function for reading/writing of file offsets */
 
 #ifdef SHERLOCK_CONFIG_LARGE_DB
@@ -316,3 +326,5 @@ bputsn(struct fastbuf *f, byte *b)
 #define bgetp(f) bgetl(f)
 #define bputp(f,l) bputl(f,l)
 #endif
+
+#endif