C++ compilation.

[idzebra-moved-to-github.git] / bfile / cfile.h

diff --git a/bfile/cfile.h b/bfile/cfile.h
index 2f8c3bb..0f22c29 100644 (file)
--- a/bfile/cfile.h
+++ b/bfile/cfile.h
@@ -1,29 +1,29 @@
 /*
- * Copyright (C) 1995, Index Data I/S 
+ * Copyright (C) 1995-1999, Index Data
  * All rights reserved.
  * Sebastian Hammer, Adam Dickmeiss
  *
- * $Log: cfile.h,v $
- * Revision 1.2  1995-12-01 11:37:23  adam
- * Cached/commit files implemented as meta-files.
- *
- * Revision 1.1  1995/11/30  08:33:12  adam
- * Started work on commit facility.
- *
+ * $Id: cfile.h,v 1.12 1999-05-26 07:49:12 adam Exp $
  */
 
 #ifndef CFILE_H
 #define CFILE_H
 
-#define HASH_BUCKET 63
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#define HASH_BUCKET 15
+
+struct CFile_ph_bucket {     /* structure on disc */
+    int no[HASH_BUCKET];     /* block number in original file */
+    int vno[HASH_BUCKET];    /* block number in shadow file */
+    int this_bucket;         /* this bucket number */
+    int next_bucket;         /* next bucket number */
+};
 
 struct CFile_hash_bucket {
-    struct CFile_ph_bucket {
-        int no[HASH_BUCKET];
-        int vno[HASH_BUCKET];
-        int this_bucket;
-        int next_bucket;
-    } ph;
+    struct CFile_ph_bucket ph;
     int dirty;
     struct CFile_hash_bucket *h_next, **h_prev;
     struct CFile_hash_bucket *lru_next, *lru_prev;
@@ -31,13 +31,18 @@ struct CFile_hash_bucket {
 
 #define HASH_BSIZE sizeof(struct CFile_ph_bucket)
 
+#define CFILE_FLAT 1
+
 typedef struct CFile_struct
 {
     struct CFile_head {
-        int hash_size;
-        int next_bucket;
-        int next_block;
-        int block_size;
+        int state;               /* 1 = hash, 2 = flat */
+        int next_block;          /* next free block / last block */
+        int block_size;          /* mfile/bfile block size */
+        int hash_size;           /* no of chains in hash table */
+        int first_bucket;        /* first hash bucket */
+        int next_bucket;         /* last hash bucket + 1 = first flat bucket */
+        int flat_bucket;         /* last flat bucket + 1 */
     } head;
     MFile block_mf;
     MFile hash_mf;
@@ -49,13 +54,20 @@ typedef struct CFile_struct
     int max_bucket_in_memory;
     char *iobuf;
     MFile rmf;
+    int  no_hits;
+    int  no_miss;
 } *CFile;
 
 int cf_close (CFile cf);
-CFile cf_open (MFile mf, const char *fname, int block_size, int wflag,
-               int *firstp);
-int cf_read (CFile cf, int no, int offset, int num, void *buf);
-int cf_write (CFile cf, int no, int offset, int num, const void *buf);
+CFile cf_open (MFile mf, MFile_area area, const char *fname, int block_size,
+               int wflag, int *firstp);
+int cf_read (CFile cf, int no, int offset, int nbytes, void *buf);
+int cf_write (CFile cf, int no, int offset, int nbytes, const void *buf);
+void cf_unlink (CFile cf);
 void cf_commit (CFile cf);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif