More APIs. (#125)

sqlite3_db_cacheflush
sqlite3_db_status
sqlite3_expanded_sql
sqlite3_next_stmt
sqlite3_sql
sqlite3_table_column_metadata
sqlite3_trace_v2
sqlite3_value_frombind

internal/util/error.go

@@ -12,6 +12,7 @@ func (e ErrorString) Error() string { return string(e) }
 const (
 	NilErr       = ErrorString("sqlite3: invalid memory address or null pointer dereference")
 	OOMErr       = ErrorString("sqlite3: out of memory")
+	ArgErr       = ErrorString("sqlite3: invalid argument")
 	RangeErr     = ErrorString("sqlite3: index out of range")
 	NoNulErr     = ErrorString("sqlite3: missing NUL terminator")
 	NoBinaryErr  = ErrorString("sqlite3: no SQLite binary embed/set/loaded")

internal/util/mmap.go

@@ -32,7 +32,7 @@ func (s *mmapState) new(ctx context.Context, mod api.Module, size int32) *Mapped
 
 	// Allocate page aligned memmory.
 	alloc := mod.ExportedFunction("aligned_alloc")
-	stack := [2]uint64{
+	stack := [...]uint64{
 		uint64(unix.Getpagesize()),
 		uint64(size),
 	}