Import SQLite 3.8.7.4.

third_party/sqlite/src/src/wal.h

Index: third_party/sqlite/src/src/wal.h
diff --git a/third_party/sqlite/src/src/wal.h b/third_party/sqlite/src/src/wal.h
index 2039c701cf29bae49a7e984c4b1d59aa76683040..092546354b34c0ab3d20056a7f8a8a52e4d0b5f5 100644
--- a/third_party/sqlite/src/src/wal.h
+++ b/third_party/sqlite/src/src/wal.h
@@ -19,12 +19,18 @@
 
 #include "sqliteInt.h"
 
+/* Additional values that can be added to the sync_flags argument of
+** sqlite3WalFrames():
+*/
+#define WAL_SYNC_TRANSACTIONS  0x20   /* Sync at the end of each transaction */
+#define SQLITE_SYNC_MASK       0x13   /* Mask off the SQLITE_SYNC_* values */
+
 #ifdef SQLITE_OMIT_WAL
 # define sqlite3WalOpen(x,y,z)                   0
+# define sqlite3WalLimit(x,y)
 # define sqlite3WalClose(w,x,y,z)                0
 # define sqlite3WalBeginReadTransaction(y,z)     0
 # define sqlite3WalEndReadTransaction(z)
-# define sqlite3WalRead(v,w,x,y,z)               0
 # define sqlite3WalDbsize(y)                     0
 # define sqlite3WalBeginWriteTransaction(y)      0
 # define sqlite3WalEndWriteTransaction(x)        0
@@ -36,6 +42,8 @@
 # define sqlite3WalCallback(z)                   0
 # define sqlite3WalExclusiveMode(y,z)            0
 # define sqlite3WalHeapMemory(z)                 0
+# define sqlite3WalFramesize(z)                  0
+# define sqlite3WalFindFrame(x,y,z)              0
 #else
 
 #define WAL_SAVEPOINT_NDATA 4
@@ -46,9 +54,12 @@
 typedef struct Wal Wal;
 
 /* Open and close a connection to a write-ahead log. */
-int sqlite3WalOpen(sqlite3_vfs*, sqlite3_file*, const char *zName, int, Wal**);
+int sqlite3WalOpen(sqlite3_vfs*, sqlite3_file*, const char *, int, i64, Wal**);
 int sqlite3WalClose(Wal *pWal, int sync_flags, int, u8 *);
 
+/* Set the limiting size of a WAL file. */
+void sqlite3WalLimit(Wal*, i64);
+
 /* Used by readers to open (lock) and close (unlock) a snapshot.  A 
 ** snapshot is like a read-transaction.  It is the state of the database
 ** at an instant in time.  sqlite3WalOpenSnapshot gets a read lock and
@@ -60,7 +71,8 @@ int sqlite3WalBeginReadTransaction(Wal *pWal, int *);
 void sqlite3WalEndReadTransaction(Wal *pWal);
 
 /* Read a page from the write-ahead log, if it is present. */
-int sqlite3WalRead(Wal *pWal, Pgno pgno, int *pInWal, int nOut, u8 *pOut);
+int sqlite3WalFindFrame(Wal *, Pgno, u32 *);
+int sqlite3WalReadFrame(Wal *, u32, int, u8 *);
 
 /* If the WAL is not empty, return the size of the database. */
 Pgno sqlite3WalDbsize(Wal *pWal);
@@ -114,5 +126,12 @@ int sqlite3WalExclusiveMode(Wal *pWal, int op);
 */
 int sqlite3WalHeapMemory(Wal *pWal);
 
+#ifdef SQLITE_ENABLE_ZIPVFS
+/* If the WAL file is not empty, return the number of bytes of content
+** stored in each frame (i.e. the db page-size when the WAL was created).
+*/
+int sqlite3WalFramesize(Wal *pWal);
+#endif
+
 #endif /* ifndef SQLITE_OMIT_WAL */
 #endif /* _WAL_H_ */