diff options
Diffstat (limited to 'src/buffer.h')
| -rw-r--r-- | src/buffer.h | 28 |
1 files changed, 26 insertions, 2 deletions
diff --git a/src/buffer.h b/src/buffer.h index b52f83a6e06..0755db25f9f 100644 --- a/src/buffer.h +++ b/src/buffer.h @@ -737,6 +737,9 @@ struct buffer like vi). */ Lisp_Object indicate_empty_lines; + /* Non-nil means indicate buffer boundaries and scrolling. */ + Lisp_Object indicate_buffer_boundaries; + /* Time stamp updated each time this buffer is displayed in a window. */ Lisp_Object display_time; @@ -911,8 +914,26 @@ extern int last_per_buffer_idx; (B)->local_flags[IDX] = (VAL); \ } while (0) -/* Return the index of the per-buffer variable at offset OFFSET in the - buffer structure. */ +/* Return the index value of the per-buffer variable at offset OFFSET + in the buffer structure. + + If the slot OFFSET has a corresponding default value in + buffer_defaults, the index value is positive and has only one + nonzero bit. When a buffer has its own local value for a slot, the + bit for that slot (found in the same slot in this structure) is + turned on in the buffer's local_flags array. + + If the index value is -1, even though there may be a + DEFVAR_PER_BUFFER for the slot, there is no default value for it; + and the corresponding slot in buffer_defaults is not used. + + If the index value is -2, then there is no DEFVAR_PER_BUFFER for + the slot, but there is a default value which is copied into each + new buffer. + + If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is + zero, that is a bug */ + #define PER_BUFFER_IDX(OFFSET) \ XINT (*(Lisp_Object *)((OFFSET) + (char *) &buffer_local_flags)) @@ -940,3 +961,6 @@ extern int last_per_buffer_idx; #define PER_BUFFER_TYPE(OFFSET) \ (*(Lisp_Object *)((OFFSET) + (char *) &buffer_local_types)) + +/* arch-tag: 679305dd-d41c-4a50-b170-3caf5c97b2d1 + (do not change this comment) */ |