/* FIXME: should we move this into ->text->auto_save_modiff? */
#define BUF_AUTOSAVE_MODIFF(buf) ((buf)->auto_save_modified)
+/* Compaction count. */
+#define BUF_COMPACT(buf) ((buf)->text->compact)
+
/* Marker chain of buffer. */
#define BUF_MARKERS(buf) ((buf)->text->markers)
struct buffer
{
- /* HEADER.NEXT is the next buffer, in chain of all buffers, including killed
- buffers. This chain, starting from all_buffers, is used only for garbage
- collection, in order to collect killed buffers properly. Note that large
- vectors and large pseudo-vector objects are all on another chain starting
- from large_vectors. */
struct vectorlike_header header;
/* The name of this buffer. */
In an indirect buffer, this is the own_text field of another buffer. */
struct buffer_text *text;
+ /* Next buffer, in chain of all buffers, including killed ones. */
+ struct buffer *next;
+
/* Char position of point in buffer. */
ptrdiff_t pt;
In an ordinary buffer, it is 0. */
struct buffer *base_buffer;
- /* In an indirect buffer, this is -1. In an ordinary buffer,
+ /* In an indirect buffer, this is -1. In an ordinary buffer,
it's the number of indirect buffers that share our text;
zero means that we're the only owner of this text. */
int indirections;
+ /* Number of windows showing this buffer. Always -1 for
+ an indirect buffer since it counts as its base buffer. */
+ int window_count;
+
/* A non-zero value in slot IDX means that per-buffer variable
with index IDX has a local value in this buffer. The index IDX
for a buffer-local variable is stored in that variable's slot
b->INTERNAL_FIELD (width_table) = val;
}
+/* Number of Lisp_Objects at the beginning of struct buffer.
+ If you add, remove, or reorder Lisp_Objects within buffer
+ structure, make sure that this is still correct. */
+
+#define BUFFER_LISP_SIZE \
+ ((offsetof (struct buffer, own_text) - header_size) / word_size)
+
+/* Size of the struct buffer part beyond leading Lisp_Objects, in word_size
+ units. Rounding is needed for --with-wide-int configuration. */
+
+#define BUFFER_REST_SIZE \
+ ((((sizeof (struct buffer) - offsetof (struct buffer, own_text)) \
+ + (word_size - 1)) & ~(word_size - 1)) / word_size)
+
+/* Initialize the pseudovector header of buffer object. BUFFER_LISP_SIZE
+ is required for GC, but BUFFER_REST_SIZE is set up just to be consistent
+ with other pseudovectors. */
+
+#define BUFFER_PVEC_INIT(b) \
+ XSETPVECTYPESIZE (b, PVEC_BUFFER, BUFFER_LISP_SIZE, BUFFER_REST_SIZE)
+
/* Convenient check whether buffer B is live. */
#define BUFFER_LIVE_P(b) (!NILP (BVAR (b, name)))
+/* Convenient check whether buffer B is hidden (i.e. its name
+ starts with a space). Caller must ensure that B is live. */
+
+#define BUFFER_HIDDEN_P(b) (SREF (BVAR (b, name), 0) == ' ')
+
/* Verify indirection counters. */
#define BUFFER_CHECK_INDIRECTION(b) \
/* Used to iterate over the chain above. */
#define FOR_EACH_BUFFER(b) \
- for ((b) = all_buffers; (b); (b) = (b)->header.next.buffer)
+ for ((b) = all_buffers; (b); (b) = (b)->next)
/* This points to the current buffer. */
+ pos + BUF_BEG_ADDR (buf) - BEG_BYTE);
return STRING_CHAR (p);
}
-\f
+
+/* Return number of windows showing B. */
+
+BUFFER_INLINE int
+buffer_window_count (struct buffer *b)
+{
+ if (b->base_buffer)
+ b = b->base_buffer;
+ eassert (b->window_count >= 0);
+ return b->window_count;
+}
+
/* Overlays */
/* Return the marker that stands for where OV starts in the buffer. */