Add definitions of the CollSeq and KeyInfo structures. (CVS 1399)

FossilOrigin-Name: cd1be81569aa6d5a365eb27b7d067a153079ce45

src/vdbe.h

@@ -15,7 +15,7 @@
 ** or VDBE.  The VDBE implements an abstract machine that runs a
 ** simple program to access and modify the underlying database.
 **
-** $Id: vdbe.h,v 1.76 2004/05/18 10:06:26 danielk1977 Exp $
+** $Id: vdbe.h,v 1.77 2004/05/18 23:21:36 drh Exp $
 */
 #ifndef _SQLITE_VDBE_H_
 #define _SQLITE_VDBE_H_
@@ -80,6 +80,22 @@ typedef struct VdbeOpList VdbeOpList;
 */
 #include "opcodes.h"
 
+/*
+** An instance of the following structure is passed as the first
+** argument to sqlite3VdbeKeyCompare and is used to control the 
+** comparison of the two keys.
+**
+** If the KeyInfo.incrKey value is true and the comparison would
+** otherwise be equal, then return a result as if the second key larger.
+*/
+typedef struct KeyInfo KeyInfo;
+struct KeyInfo {
+  u8 incrKey;           /* Increase value of 2nd key by epsilon */
+  u8 reverseOrder;      /* If true, reverse the comparison order */
+  int nField;           /* Number of entries in aColl[] */
+  struct CollSeq *aColl[1];  /* Collating sequence for each term of the key */
+};
+
 /*
 ** Prototypes for the VDBE interface.  See comments on the implementation
 ** for a description of what each of these routines does.