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 a slot is -2, then there is no DEFVAR_PER_BUFFER for it,
- but there is a default value which is copied into each buffer.
-
If a slot in this structure corresponding to a DEFVAR_PER_BUFFER is
zero, that is a bug */
/* A Lisp_Object pointer to the above, used for staticpro */
static Lisp_Object Vbuffer_local_symbols;
+/* Return the symbol of the per-buffer variable at offset OFFSET in
+ the buffer structure. */
+
+#define PER_BUFFER_SYMBOL(OFFSET) \
+ (*(Lisp_Object *)((OFFSET) + (char *) &buffer_local_symbols))
+
/* Flags indicating which built-in buffer-local variables
are permanent locals. */
static char buffer_permanent_local_flags[MAX_PER_BUFFER_VARS];
continue;
obj = PER_BUFFER_VALUE (from, offset);
- if (MARKERP (obj))
+ if (MARKERP (obj) && XMARKER (obj)->buffer == from)
{
struct Lisp_Marker *m = XMARKER (obj);
obj = Fmake_marker ();
{
Lisp_Object tmp, prop, last = Qnil;
for (tmp = b->local_var_alist; CONSP (tmp); tmp = XCDR (tmp))
- if (CONSP (XCAR (tmp))
- && SYMBOLP (XCAR (XCAR (tmp)))
- && !NILP (prop = Fget (XCAR (XCAR (tmp)), Qpermanent_local)))
+ if (!NILP (prop = Fget (XCAR (XCAR (tmp)), Qpermanent_local)))
{
/* If permanent-local, keep it. */
last = tmp;
int idx = PER_BUFFER_IDX (offset);
if ((idx > 0
&& (permanent_too
- || buffer_permanent_local_flags[idx] == 0))
- /* Is -2 used anywhere? */
- || idx == -2)
+ || buffer_permanent_local_flags[idx] == 0)))
PER_BUFFER_VALUE (b, offset) = PER_BUFFER_DEFAULT (offset);
}
}
CHECK_SYMBOL (variable);
CHECK_BUFFER (buffer);
buf = XBUFFER (buffer);
+ sym = XSYMBOL (variable);
- sym = indirect_variable (XSYMBOL (variable));
- XSETSYMBOL (variable, sym);
-
- /* Look in local_var_list */
- result = Fassoc (variable, buf->local_var_alist);
- if (NILP (result))
+ start:
+ switch (sym->redirect)
{
- int offset, idx;
- int found = 0;
-
- /* Look in special slots */
- /* buffer-local Lisp variables start at `undo_list',
- tho only the ones from `name' on are GC'd normally. */
- for (offset = PER_BUFFER_VAR_OFFSET (undo_list);
- offset < sizeof (struct buffer);
- /* sizeof EMACS_INT == sizeof Lisp_Object */
- offset += (sizeof (EMACS_INT)))
- {
- idx = PER_BUFFER_IDX (offset);
- if ((idx == -1 || PER_BUFFER_VALUE_P (buf, idx))
- && SYMBOLP (PER_BUFFER_SYMBOL (offset))
- && EQ (PER_BUFFER_SYMBOL (offset), variable))
- {
- result = PER_BUFFER_VALUE (buf, offset);
- found = 1;
- break;
- }
- }
-
- if (!found)
- result = Fdefault_value (variable);
- }
- else
- {
- Lisp_Object valcontents;
- Lisp_Object current_alist_element;
-
- /* What binding is loaded right now? */
- valcontents = sym->value;
- current_alist_element
- = XCAR (XBUFFER_LOCAL_VALUE (valcontents)->cdr);
-
- /* The value of the currently loaded binding is not
- stored in it, but rather in the realvalue slot.
- Store that value into the binding it belongs to
- in case that is the one we are about to use. */
+ case SYMBOL_VARALIAS: sym = indirect_variable (sym); goto start;
+ case SYMBOL_PLAINVAL: result = SYMBOL_VAL (sym); break;
+ case SYMBOL_LOCALIZED:
+ { /* Look in local_var_alist. */
+ struct Lisp_Buffer_Local_Value *blv = SYMBOL_BLV (sym);
+ XSETSYMBOL (variable, sym); /* Update In case of aliasing. */
+ result = Fassoc (variable, buf->local_var_alist);
+ if (!NILP (result))
+ {
+ if (blv->fwd)
+ { /* What binding is loaded right now? */
+ Lisp_Object current_alist_element = blv->valcell;
- Fsetcdr (current_alist_element,
- do_symval_forwarding (XBUFFER_LOCAL_VALUE (valcontents)->realvalue));
+ /* The value of the currently loaded binding is not
+ stored in it, but rather in the realvalue slot.
+ Store that value into the binding it belongs to
+ in case that is the one we are about to use. */
- /* Now get the (perhaps updated) value out of the binding. */
- result = XCDR (result);
+ XSETCDR (current_alist_element,
+ do_symval_forwarding (blv->fwd));
+ }
+ /* Now get the (perhaps updated) value out of the binding. */
+ result = XCDR (result);
+ }
+ else
+ result = Fdefault_value (variable);
+ break;
+ }
+ case SYMBOL_FORWARDED:
+ {
+ union Lisp_Fwd *fwd = SYMBOL_FWD (sym);
+ if (BUFFER_OBJFWDP (fwd))
+ result = PER_BUFFER_VALUE (buf, XBUFFER_OBJFWD (fwd)->offset);
+ else
+ result = Fdefault_value (variable);
+ break;
+ }
+ default: abort ();
}
if (!EQ (result, Qunbound))
if (buf != current_buffer)
val = XCDR (elt);
- /* If symbol is unbound, put just the symbol in the list. */
- if (EQ (val, Qunbound))
- result = Fcons (XCAR (elt), result);
- /* Otherwise, put (symbol . value) in the list. */
- else
- result = Fcons (Fcons (XCAR (elt), val), result);
+ result = Fcons (Fcons (XCAR (elt), val), result);
}
return result;
register struct buffer *b;
{
register struct buffer *old_buf;
- register Lisp_Object tail, valcontents;
- Lisp_Object tem;
+ register Lisp_Object tail;
#ifdef USE_MMAP_FOR_BUFFERS
if (b->text->beg == NULL)
/* Look down buffer's list of local Lisp variables
to find and update any that forward into C variables. */
- for (tail = b->local_var_alist; CONSP (tail); tail = XCDR (tail))
+ do
{
- if (CONSP (XCAR (tail))
- && SYMBOLP (XCAR (XCAR (tail)))
- && (valcontents = SYMBOL_VALUE (XCAR (XCAR (tail))),
- (BUFFER_LOCAL_VALUEP (valcontents)))
- && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue,
- (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem))))
- /* Just reference the variable to cause it to become set for
- this buffer. */
- Fsymbol_value (XCAR (XCAR (tail)));
+ for (tail = b->local_var_alist; CONSP (tail); tail = XCDR (tail))
+ {
+ Lisp_Object var = XCAR (XCAR (tail));
+ struct Lisp_Symbol *sym = XSYMBOL (var);
+ if (sym->redirect == SYMBOL_LOCALIZED /* Just to be sure. */
+ && SYMBOL_BLV (sym)->fwd)
+ /* Just reference the variable
+ to cause it to become set for this buffer. */
+ Fsymbol_value (var);
+ }
}
-
/* Do the same with any others that were local to the previous buffer */
-
- if (old_buf)
- for (tail = old_buf->local_var_alist; CONSP (tail); tail = XCDR (tail))
- {
- if (CONSP (tail)
- && SYMBOLP (XCAR (XCAR (tail)))
- && (valcontents = SYMBOL_VALUE (XCAR (XCAR (tail))),
- (BUFFER_LOCAL_VALUEP (valcontents)))
- && (tem = XBUFFER_LOCAL_VALUE (valcontents)->realvalue,
- (BOOLFWDP (tem) || INTFWDP (tem) || OBJFWDP (tem))))
- /* Just reference the variable to cause it to become set for
- this buffer. */
- Fsymbol_value (XCAR (XCAR (tail)));
- }
+ while (b != old_buf && (b = old_buf, b));
}
/* Switch to buffer B temporarily for redisplay purposes.
swap_out_buffer_local_variables (b)
struct buffer *b;
{
- Lisp_Object oalist, alist, sym, buffer;
+ Lisp_Object oalist, alist, buffer;
XSETBUFFER (buffer, b);
oalist = b->local_var_alist;
for (alist = oalist; CONSP (alist); alist = XCDR (alist))
{
- if (CONSP (XCAR (alist))
- && (sym = XCAR (XCAR (alist)), SYMBOLP (sym))
- /* Need not do anything if some other buffer's binding is
- now encached. */
- && EQ (XBUFFER_LOCAL_VALUE (SYMBOL_VALUE (sym))->buffer,
- buffer))
+ Lisp_Object sym = XCAR (XCAR (alist));
+ eassert (XSYMBOL (sym)->redirect == SYMBOL_LOCALIZED);
+ /* Need not do anything if some other buffer's binding is
+ now encached. */
+ if (EQ (SYMBOL_BLV (XSYMBOL (sym))->where, buffer))
{
/* Symbol is set up for this buffer's old local value:
swap it out! */
- swap_in_global_binding (sym);
+ swap_in_global_binding (XSYMBOL (sym));
}
}
}
/* Make sure all markable slots in buffer_defaults
are initialized reasonably, so mark_buffer won't choke. */
reset_buffer (&buffer_defaults);
+ eassert (EQ (buffer_defaults.name, make_number (0)));
reset_buffer_local_variables (&buffer_defaults, 1);
+ eassert (EQ (buffer_local_symbols.name, make_number (0)));
reset_buffer (&buffer_local_symbols);
reset_buffer_local_variables (&buffer_local_symbols, 1);
/* Prevent GC from getting confused. */
buffer_defaults.word_wrap = Qnil;
buffer_defaults.ctl_arrow = Qt;
buffer_defaults.bidi_display_reordering = Qnil;
- buffer_defaults.direction_reversed = Qnil;
buffer_defaults.bidi_paragraph_direction = Qnil;
buffer_defaults.cursor_type = Qt;
buffer_defaults.extra_line_spacing = Qnil;
XSETFASTINT (buffer_local_flags.cache_long_line_scans, idx); ++idx;
XSETFASTINT (buffer_local_flags.category_table, idx); ++idx;
XSETFASTINT (buffer_local_flags.bidi_display_reordering, idx); ++idx;
- XSETFASTINT (buffer_local_flags.direction_reversed, idx); ++idx;
XSETFASTINT (buffer_local_flags.bidi_paragraph_direction, idx); ++idx;
XSETFASTINT (buffer_local_flags.buffer_file_coding_system, idx);
/* Make this one a permanent local. */
in the buffer that is current now. */
/* TYPE is nil for a general Lisp variable.
- An integer specifies a type; then only LIsp values
+ An integer specifies a type; then only Lisp values
with that type code are allowed (except that nil is allowed too).
- LNAME is the LIsp-level variable name.
+ LNAME is the Lisp-level variable name.
VNAME is the name of the buffer slot.
DOC is a dummy where you write the doc string as a comment. */
-#define DEFVAR_PER_BUFFER(lname, vname, type, doc) \
- defvar_per_buffer (lname, vname, type, 0)
+#define DEFVAR_PER_BUFFER(lname, vname, type, doc) \
+ do { \
+ static struct Lisp_Buffer_Objfwd bo_fwd; \
+ defvar_per_buffer (&bo_fwd, lname, vname, type, 0); \
+ } while (0)
static void
-defvar_per_buffer (namestring, address, type, doc)
+defvar_per_buffer (bo_fwd, namestring, address, type, doc)
+ struct Lisp_Buffer_Objfwd *bo_fwd;
char *namestring;
Lisp_Object *address;
Lisp_Object type;
char *doc;
{
- Lisp_Object sym, val;
+ struct Lisp_Symbol *sym;
int offset;
- sym = intern (namestring);
- val = allocate_misc ();
+ sym = XSYMBOL (intern (namestring));
offset = (char *)address - (char *)current_buffer;
- XMISCTYPE (val) = Lisp_Misc_Buffer_Objfwd;
- XBUFFER_OBJFWD (val)->offset = offset;
- XBUFFER_OBJFWD (val)->slottype = type;
- SET_SYMBOL_VALUE (sym, val);
- PER_BUFFER_SYMBOL (offset) = sym;
+ bo_fwd->type = Lisp_Fwd_Buffer_Obj;
+ bo_fwd->offset = offset;
+ bo_fwd->slottype = type;
+ sym->redirect = SYMBOL_FORWARDED;
+ {
+ /* I tried to do the job without a cast, but it seems impossible.
+ union Lisp_Fwd *fwd; &(fwd->u_buffer_objfwd) = bo_fwd; */
+ SET_SYMBOL_FWD (sym, (union Lisp_Fwd *)bo_fwd);
+ }
+ XSETSYMBOL (PER_BUFFER_SYMBOL (offset), sym);
if (PER_BUFFER_IDX (offset) == 0)
/* Did a DEFVAR_PER_BUFFER without initializing the corresponding
This variable is never applied to a way of decoding a file while reading it. */);
- DEFVAR_PER_BUFFER ("direction-reversed",
- ¤t_buffer->direction_reversed, Qnil,
- doc: /* Non-nil means set beginning of lines at the right edge of the window.
-See also the variable `bidi-display-reordering'. */);
-
DEFVAR_PER_BUFFER ("bidi-display-reordering",
¤t_buffer->bidi_display_reordering, Qnil,
- doc: /* Non-nil means reorder bidirectional text for display in the visual order.
-See also the variable `direction-reversed'. */);
+ doc: /* Non-nil means reorder bidirectional text for display in the visual order. */);
DEFVAR_PER_BUFFER ("bidi-paragraph-direction",
¤t_buffer->bidi_paragraph_direction, Qnil,
doc: /* *If non-nil, forces directionality of text paragraphs in the buffer.
-
+
If this is nil (the default), the direction of each paragraph is
determined by the first strong directional character of its text.
The values of `right-to-left' and `left-to-right' override that.
Any other value is treated as nil.
-
+
This variable has no effect unless the buffer's value of
\`bidi-display-reordering' is non-nil. */);
HCoop / bpt / emacs.git / blobdiff