diff mercurial/cext/util.h @ 48250:1730b2fceaa1

dirstate-v2: adds a flag to mark a file as modified

Right now, a files with a file system state that requires a lookup (same size,
different mtime) will requires a lookup. If the result of that lookup is a
modified files, it will remains ambiguous, requiring a lookup on the next status
run too.

To fix this, we introduce a dedicated flag in the new format. Such flag will
allow to record such file as "known modified" avoiding an extra lookup later.

As None of the associate code currently exist in the status code, we do the
minimal implementation: if we read a dirstate entry with this flag set, we make
it as "ambiguous" so that the next status code has to look it up. The same as it
would have to without this flag existing anyway.

Differential Revision: https://phab.mercurial-scm.org/D11681

--- a/mercurial/cext/util.h	Tue Oct 19 10:52:13 2021 +0100
+++ b/mercurial/cext/util.h	Fri Oct 15 16:12:00 2021 +0200
@@ -24,21 +24,22 @@
 /* clang-format off */
 typedef struct {
 	PyObject_HEAD
-	unsigned char flags;
+	int flags;
 	int mode;
 	int size;
 	int mtime;
 } dirstateItemObject;
 /* clang-format on */
 
-static const unsigned char dirstate_flag_wc_tracked = 1;
-static const unsigned char dirstate_flag_p1_tracked = 1 << 1;
-static const unsigned char dirstate_flag_p2_info = 1 << 2;
-static const unsigned char dirstate_flag_has_meaningful_data = 1 << 3;
-static const unsigned char dirstate_flag_has_file_mtime = 1 << 4;
-static const unsigned char dirstate_flag_has_directory_mtime = 1 << 5;
-static const unsigned char dirstate_flag_mode_exec_perm = 1 << 6;
-static const unsigned char dirstate_flag_mode_is_symlink = 1 << 7;
+static const int dirstate_flag_wc_tracked = 1;
+static const int dirstate_flag_p1_tracked = 1 << 1;
+static const int dirstate_flag_p2_info = 1 << 2;
+static const int dirstate_flag_has_meaningful_data = 1 << 3;
+static const int dirstate_flag_has_file_mtime = 1 << 4;
+static const int dirstate_flag_has_directory_mtime = 1 << 5;
+static const int dirstate_flag_mode_exec_perm = 1 << 6;
+static const int dirstate_flag_mode_is_symlink = 1 << 7;
+static const int dirstate_flag_expected_state_is_modified = 1 << 8;
 
 extern PyTypeObject dirstateItemType;
 #define dirstate_tuple_check(op) (Py_TYPE(op) == &dirstateItemType)