/* Header file for the buffer manipulation primitives.
-Copyright (C) 1985-1986, 1993-1995, 1997-2012
- Free Software Foundation, Inc.
+Copyright (C) 1985-1986, 1993-1995, 1997-2013 Free Software Foundation,
+Inc.
This file is part of GNU Emacs.
/* FIXME: should we move this into ->text->auto_save_modiff? */
#define BUF_AUTOSAVE_MODIFF(buf) ((buf)->auto_save_modified)
-/* Interval tree of buffer. */
-#define BUF_INTERVALS(buf) ((buf)->text->intervals)
+/* Compaction count. */
+#define BUF_COMPACT(buf) ((buf)->text->compact)
/* Marker chain of buffer. */
#define BUF_MARKERS(buf) ((buf)->text->markers)
#define BUF_BYTES_MAX \
(ptrdiff_t) min (MOST_POSITIVE_FIXNUM - 1, min (SIZE_MAX, PTRDIFF_MAX))
+/* Maximum gap size after compact_buffer, in bytes. Also
+ used in make_gap_larger to get some extra reserved space. */
+
+#define GAP_BYTES_DFL 2000
+
+/* Minimum gap size after compact_buffer, in bytes. Also
+ used in make_gap_smaller to avoid too small gap size. */
+
+#define GAP_BYTES_MIN 20
+
/* Return the address of byte position N in current buffer. */
#define BYTE_POS_ADDR(n) \
/* Usually 0. Temporarily set to 1 in decode_coding_gap to
prevent Fgarbage_collect from shrinking the gap and losing
not-yet-decoded bytes. */
- int inhibit_shrinking;
+ bool inhibit_shrinking;
};
/* Most code should use this macro to access Lisp fields in struct buffer. */
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
Lisp_Object INTERNAL_FIELD (undo_list);
};
-\f
+/* Most code should use these functions to set Lisp fields in struct
+ buffer. */
+BUFFER_INLINE void
+bset_bidi_paragraph_direction (struct buffer *b, Lisp_Object val)
+{
+ b->INTERNAL_FIELD (bidi_paragraph_direction) = val;
+}
+BUFFER_INLINE void
+bset_case_canon_table (struct buffer *b, Lisp_Object val)
+{
+ b->INTERNAL_FIELD (case_canon_table) = val;
+}
+BUFFER_INLINE void
+bset_case_eqv_table (struct buffer *b, Lisp_Object val)
+{
+ b->INTERNAL_FIELD (case_eqv_table) = val;
+}
+BUFFER_INLINE void
+bset_directory (struct buffer *b, Lisp_Object val)
+{
+ b->INTERNAL_FIELD (directory) = val;
+}
+BUFFER_INLINE void
+bset_display_count (struct buffer *b, Lisp_Object val)
+{
+ b->INTERNAL_FIELD (display_count) = val;
+}
+BUFFER_INLINE void
+bset_display_time (struct buffer *b, Lisp_Object val)
+{
+ b->INTERNAL_FIELD (display_time) = val;
+}
+BUFFER_INLINE void
+bset_downcase_table (struct buffer *b, Lisp_Object val)
+{
+ b->INTERNAL_FIELD (downcase_table) = val;
+}
+BUFFER_INLINE void
+bset_enable_multibyte_characters (struct buffer *b, Lisp_Object val)
+{
+ b->INTERNAL_FIELD (enable_multibyte_characters) = val;
+}
+BUFFER_INLINE void
+bset_filename (struct buffer *b, Lisp_Object val)
+{
+ b->INTERNAL_FIELD (filename) = val;
+}
+BUFFER_INLINE void
+bset_keymap (struct buffer *b, Lisp_Object val)
+{
+ b->INTERNAL_FIELD (keymap) = val;
+}
+BUFFER_INLINE void
+bset_last_selected_window (struct buffer *b, Lisp_Object val)
+{
+ b->INTERNAL_FIELD (last_selected_window) = val;
+}
+BUFFER_INLINE void
+bset_local_var_alist (struct buffer *b, Lisp_Object val)
+{
+ b->INTERNAL_FIELD (local_var_alist) = val;
+}
+BUFFER_INLINE void
+bset_mark_active (struct buffer *b, Lisp_Object val)
+{
+ b->INTERNAL_FIELD (mark_active) = val;
+}
+BUFFER_INLINE void
+bset_point_before_scroll (struct buffer *b, Lisp_Object val)
+{
+ b->INTERNAL_FIELD (point_before_scroll) = val;
+}
+BUFFER_INLINE void
+bset_read_only (struct buffer *b, Lisp_Object val)
+{
+ b->INTERNAL_FIELD (read_only) = val;
+}
+BUFFER_INLINE void
+bset_truncate_lines (struct buffer *b, Lisp_Object val)
+{
+ b->INTERNAL_FIELD (truncate_lines) = val;
+}
+BUFFER_INLINE void
+bset_undo_list (struct buffer *b, Lisp_Object val)
+{
+ b->INTERNAL_FIELD (undo_list) = val;
+}
+BUFFER_INLINE void
+bset_upcase_table (struct buffer *b, Lisp_Object val)
+{
+ b->INTERNAL_FIELD (upcase_table) = val;
+}
+BUFFER_INLINE void
+bset_width_table (struct buffer *b, Lisp_Object val)
+{
+ 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) \
+ do { \
+ if (BUFFER_LIVE_P (b)) \
+ { \
+ if (b->base_buffer) \
+ { \
+ eassert (b->indirections == -1); \
+ eassert (b->base_buffer->indirections > 0); \
+ } \
+ else \
+ eassert (b->indirections >= 0); \
+ } \
+ } while (0)
+
/* Chain of all buffers, including killed ones. */
extern struct buffer *all_buffers;
/* 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. */
\f
extern void delete_all_overlays (struct buffer *);
extern void reset_buffer (struct buffer *);
-extern int compact_buffer (struct buffer *);
+extern void compact_buffer (struct buffer *);
extern void evaporate_overlays (ptrdiff_t);
-extern ptrdiff_t overlays_at (EMACS_INT pos, int extend, Lisp_Object **vec_ptr,
- ptrdiff_t *len_ptr, ptrdiff_t *next_ptr,
- ptrdiff_t *prev_ptr, int change_req);
+extern ptrdiff_t overlays_at (EMACS_INT, bool, Lisp_Object **,
+ ptrdiff_t *, ptrdiff_t *, ptrdiff_t *, bool);
extern ptrdiff_t sort_overlays (Lisp_Object *, ptrdiff_t, struct window *);
extern void recenter_overlay_lists (struct buffer *, ptrdiff_t);
extern ptrdiff_t overlay_strings (ptrdiff_t, struct window *, unsigned char **);
extern void validate_region (Lisp_Object *, Lisp_Object *);
-extern void set_buffer_internal (struct buffer *);
extern void set_buffer_internal_1 (struct buffer *);
extern void set_buffer_temp (struct buffer *);
extern Lisp_Object buffer_local_value_1 (Lisp_Object, Lisp_Object);
extern void record_buffer (Lisp_Object);
extern _Noreturn void buffer_slot_type_mismatch (Lisp_Object, int);
extern void fix_overlays_before (struct buffer *, ptrdiff_t, ptrdiff_t);
-extern void mmap_set_vars (int);
+extern void mmap_set_vars (bool);
+
+/* Set the current buffer to B.
+
+ We previously set windows_or_buffers_changed here to invalidate
+ global unchanged information in beg_unchanged and end_unchanged.
+ This is no longer necessary because we now compute unchanged
+ information on a buffer-basis. Every action affecting other
+ windows than the selected one requires a select_window at some
+ time, and that increments windows_or_buffers_changed. */
+
+BUFFER_INLINE void
+set_buffer_internal (struct buffer *b)
+{
+ if (current_buffer != b)
+ set_buffer_internal_1 (b);
+}
+
+/* Arrange to go back to the original buffer after the next
+ call to unbind_to if the original buffer is still alive. */
+
+BUFFER_INLINE void
+record_unwind_current_buffer (void)
+{
+ record_unwind_protect (set_buffer_if_live, Fcurrent_buffer ());
+}
/* Get overlays at POSN into array OVERLAYS with NOVERLAYS elements.
If NEXTP is non-NULL, return next overlay there.
extern Lisp_Object Qbefore_change_functions;
extern Lisp_Object Qafter_change_functions;
extern Lisp_Object Qfirst_change_hook;
-\f
+
+/* Get text properties of B. */
+
+BUFFER_INLINE INTERVAL
+buffer_intervals (struct buffer *b)
+{
+ eassert (b->text != NULL);
+ return b->text->intervals;
+}
+
+/* Set text properties of B to I. */
+
+BUFFER_INLINE void
+set_buffer_intervals (struct buffer *b, INTERVAL i)
+{
+ eassert (b->text != NULL);
+ b->text->intervals = i;
+}
+
+/* Non-zero if current buffer has overlays. */
+
+BUFFER_INLINE bool
+buffer_has_overlays (void)
+{
+ return current_buffer->overlays_before || current_buffer->overlays_after;
+}
+
/* Return character code of multi-byte form at byte position POS. If POS
doesn't point the head of valid multi-byte form, only the byte at
POS is returned. No range checking.
+ 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. */
-#define OVERLAY_START(OV) MVAR (XOVERLAY (OV), start)
+#define OVERLAY_START(OV) XOVERLAY (OV)->start
/* Return the marker that stands for where OV ends in the buffer. */
-#define OVERLAY_END(OV) MVAR (XOVERLAY (OV), end)
+#define OVERLAY_END(OV) XOVERLAY (OV)->end
/* Return the plist of overlay OV. */
-#define OVERLAY_PLIST(OV) MVAR (XOVERLAY (OV), plist)
+#define OVERLAY_PLIST(OV) XOVERLAY (OV)->plist
/* Return the actual buffer position for the marker P.
We assume you know which buffer it's pointing into. */
#define OVERLAY_POSITION(P) \
- (MARKERP (P) ? marker_position (P) : (abort (), 0))
+ (MARKERP (P) ? marker_position (P) : (emacs_abort (), 0))
\f
/***********************************************************************
#define PER_BUFFER_VALUE_P(B, IDX) \
(((IDX) < 0 || IDX >= last_per_buffer_idx) \
- ? (abort (), 0) \
+ ? (emacs_abort (), 0) \
: ((B)->local_flags[IDX] != 0))
/* Set whether per-buffer variable with index IDX has a buffer-local
#define SET_PER_BUFFER_VALUE_P(B, IDX, VAL) \
do { \
if ((IDX) < 0 || (IDX) >= last_per_buffer_idx) \
- abort (); \
+ emacs_abort (); \
(B)->local_flags[IDX] = (VAL); \
} while (0)
#define PER_BUFFER_IDX(OFFSET) \
XINT (*(Lisp_Object *)((OFFSET) + (char *) &buffer_local_flags))
-/* Return the default value of the per-buffer variable at offset
- OFFSET in the buffer structure. */
+/* Functions to get and set default value of the per-buffer
+ variable at offset OFFSET in the buffer structure. */
-#define PER_BUFFER_DEFAULT(OFFSET) \
- (*(Lisp_Object *)((OFFSET) + (char *) &buffer_defaults))
+BUFFER_INLINE Lisp_Object
+per_buffer_default (int offset)
+{
+ return *(Lisp_Object *)(offset + (char *) &buffer_defaults);
+}
-/* Return the buffer-local value of the per-buffer variable at offset
- OFFSET in the buffer structure. */
+BUFFER_INLINE void
+set_per_buffer_default (int offset, Lisp_Object value)
+{
+ *(Lisp_Object *)(offset + (char *) &buffer_defaults) = value;
+}
+
+/* Functions to get and set buffer-local value of the per-buffer
+ variable at offset OFFSET in the buffer structure. */
+
+BUFFER_INLINE Lisp_Object
+per_buffer_value (struct buffer *b, int offset)
+{
+ return *(Lisp_Object *)(offset + (char *) b);
+}
+
+BUFFER_INLINE void
+set_per_buffer_value (struct buffer *b, int offset, Lisp_Object value)
+{
+ *(Lisp_Object *)(offset + (char *) b) = value;
+}
-#define PER_BUFFER_VALUE(BUFFER, OFFSET) \
- (*(Lisp_Object *)((OFFSET) + (char *) (BUFFER)))
-\f
/* Downcase a character C, or make no change if that cannot be done. */
BUFFER_INLINE int
downcase (int c)
}
/* 1 if C is upper case. */
-BUFFER_INLINE int uppercasep (int c) { return downcase (c) != c; }
+BUFFER_INLINE bool uppercasep (int c) { return downcase (c) != c; }
/* Upcase a character C known to be not upper case. */
BUFFER_INLINE int
}
/* 1 if C is lower case. */
-BUFFER_INLINE int lowercasep (int c)
-{ return !uppercasep (c) && upcase1 (c) != c; }
+BUFFER_INLINE bool
+lowercasep (int c)
+{
+ return !uppercasep (c) && upcase1 (c) != c;
+}
/* Upcase a character C, or make no change if that cannot be done. */
BUFFER_INLINE int upcase (int c) { return uppercasep (c) ? c : upcase1 (c); }
HCoop / bpt / emacs.git / blobdiff