/* Buffer manipulation primitives for GNU Emacs.
-Copyright (C) 1985-1989, 1993-1995, 1997-2011 Free Software Foundation, Inc.
+Copyright (C) 1985-1989, 1993-1995, 1997-2012 Free Software Foundation, Inc.
This file is part of GNU Emacs.
Lisp_Object Qinsert_in_front_hooks;
Lisp_Object Qinsert_behind_hooks;
-static void alloc_buffer_text (struct buffer *, size_t);
+static void alloc_buffer_text (struct buffer *, ptrdiff_t);
static void free_buffer_text (struct buffer *b);
static struct Lisp_Overlay * copy_overlays (struct buffer *, struct Lisp_Overlay *);
static void modify_overlay (struct buffer *, EMACS_INT, EMACS_INT);
-static Lisp_Object buffer_lisp_local_variables (struct buffer *);
+static Lisp_Object buffer_lisp_local_variables (struct buffer *, int);
/* For debugging; temporary. See set_buffer_internal. */
/* Lisp_Object Qlisp_mode, Vcheck_symbol; */
call the corresponding file handler. */
handler = Ffind_file_name_handler (filename, Qget_file_buffer);
if (!NILP (handler))
- return call2 (handler, Qget_file_buffer, filename);
+ {
+ Lisp_Object handled_buf = call2 (handler, Qget_file_buffer,
+ filename);
+ return BUFFERP (handled_buf) ? handled_buf : Qnil;
+ }
for (tail = Vbuffer_alist; CONSP (tail); tail = XCDR (tail))
{
BUF_END_UNCHANGED (b) = 0;
BUF_BEG_UNCHANGED (b) = 0;
*(BUF_GPT_ADDR (b)) = *(BUF_Z_ADDR (b)) = 0; /* Put an anchor '\0'. */
+ b->text->inhibit_shrinking = 0;
b->newline_cache = 0;
b->width_run_cache = 0;
/* Get (a copy of) the alist of Lisp-level local variables of FROM
and install that in TO. */
- BVAR (to, local_var_alist) = buffer_lisp_local_variables (from);
+ BVAR (to, local_var_alist) = buffer_lisp_local_variables (from, 1);
}
b->prevent_redisplay_optimizations_p = 1;
BVAR (b, backed_up) = Qnil;
BUF_AUTOSAVE_MODIFF (b) = 0;
- b->auto_save_failure_time = -1;
+ b->auto_save_failure_time = 0;
BVAR (b, auto_save_file_name) = Qnil;
BVAR (b, read_only) = Qnil;
b->overlays_before = NULL;
/* 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 *b;
+ for (offset = PER_BUFFER_VAR_OFFSET (FIRST_FIELD_PER_BUFFER);
+ offset <= PER_BUFFER_VAR_OFFSET (LAST_FIELD_PER_BUFFER);
offset += sizeof (Lisp_Object))
{
int idx = PER_BUFFER_IDX (offset);
/* Return an alist of the Lisp-level buffer-local bindings of
buffer BUF. That is, don't include the variables maintained
- in special slots in the buffer object. */
+ in special slots in the buffer object.
+ If CLONE is zero elements of the form (VAR . unbound) are replaced
+ by VAR. */
static Lisp_Object
-buffer_lisp_local_variables (struct buffer *buf)
+buffer_lisp_local_variables (struct buffer *buf, int clone)
{
Lisp_Object result = Qnil;
register Lisp_Object tail;
if (buf != current_buffer)
val = XCDR (elt);
- result = Fcons (Fcons (XCAR (elt), val), result);
+ result = Fcons (!clone && EQ (val, Qunbound)
+ ? XCAR (elt)
+ : Fcons (XCAR (elt), val),
+ result);
}
return result;
buf = XBUFFER (buffer);
}
- result = buffer_lisp_local_variables (buf);
+ result = buffer_lisp_local_variables (buf, 0);
/* Add on all the variables stored 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);
+ for (offset = PER_BUFFER_VAR_OFFSET (FIRST_FIELD_PER_BUFFER);
+ offset <= PER_BUFFER_VAR_OFFSET (LAST_FIELD_PER_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)))
- result = Fcons (Fcons (PER_BUFFER_SYMBOL (offset),
- PER_BUFFER_VALUE (buf, offset)),
- result);
+ {
+ Lisp_Object sym = PER_BUFFER_SYMBOL (offset);
+ Lisp_Object val = PER_BUFFER_VALUE (buf, offset);
+ result = Fcons (EQ (val, Qunbound) ? sym : Fcons (sym, val),
+ result);
+ }
}
}
UNGCPRO;
}
- /* Make this buffer not be current.
+ /* Run replace_buffer_in_windows before making another buffer current
+ since set-window-buffer-start-and-point will refuse to make another
+ buffer current if the selected window does not show the current
+ buffer. (Bug#10114) */
+ replace_buffer_in_windows (buffer);
+
+ /* Make this buffer not be current.
In the process, notice if this is the sole visible buffer
and give up if so. */
if (b == current_buffer)
/* These may run Lisp code and into infinite loops (if someone
insisted on circular lists) so allow quitting here. */
- replace_buffer_in_windows (buffer);
frames_discard_buffer (buffer);
clear_charpos_cache (b);
/* Reset the local variables, so that this buffer's local values
won't be protected from GC. They would be protected
- if they happened to remain encached in their symbols.
+ if they happened to remain cached in their symbols.
This gets rid of them for certain. */
swap_out_buffer_local_variables (b);
reset_buffer_local_variables (b, 1);
call1 (Vrun_hooks, Qbuffer_list_update_hook);
}
-DEFUN ("record-buffer", Frecord_buffer, Srecord_buffer, 1, 1, 0,
- doc: /* Move BUFFER to the front of the buffer list.
-Return BUFFER. */)
- (Lisp_Object buffer)
-{
- CHECK_BUFFER (buffer);
- record_buffer (buffer);
-
- return buffer;
-}
+/* Move BUFFER to the end of the buffer (a)lists. Do nothing if the
+ buffer is killed. For the selected frame's buffer list this moves
+ BUFFER to its end even if it was never shown in that frame. If
+ this happens we have a feature, hence `bury-buffer-internal' should be
+ called only when BUFFER was shown in the selected frame. */
- /* Move BUFFER to the end of the buffer (a)lists. Do nothing if the
- buffer is killed. For the selected frame's buffer list this moves
- BUFFER to its end even if it was never shown in that frame. If
- this happens we have a feature, hence `unrecord-buffer' should be
- called only when BUFFER was shown in the selected frame. */
-
-DEFUN ("unrecord-buffer", Funrecord_buffer, Sunrecord_buffer, 1, 1, 0,
- doc: /* Move BUFFER to the end of the buffer list.
-Return BUFFER. */)
+DEFUN ("bury-buffer-internal", Fbury_buffer_internal, Sbury_buffer_internal,
+ 1, 1, 0,
+ doc: /* Move BUFFER to the end of the buffer list. */)
(Lisp_Object buffer)
{
Lisp_Object aelt, aelt_cons, tem;
if (!NILP (Vrun_hooks))
call1 (Vrun_hooks, Qbuffer_list_update_hook);
- return buffer;
+ return Qnil;
}
DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, Sset_buffer_major_mode, 1, 1, 0,
return byte_pos;
}
-#ifdef REL_ALLOC
-extern void r_alloc_reset_variable (POINTER_TYPE *, POINTER_TYPE *);
-#endif /* REL_ALLOC */
-
DEFUN ("buffer-swap-text", Fbuffer_swap_text, Sbuffer_swap_text,
1, 1, 0,
doc: /* Swap the text between current buffer and 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. */
+ now cached. */
if (EQ (SYMBOL_BLV (XSYMBOL (sym))->where, buffer))
{
/* Symbol is set up for this buffer's old local value:
Either make it bigger, or don't store any more in it. */
if (extend)
{
- if ((OVERLAY_COUNT_MAX - 4) / 2 < len)
- memory_full (SIZE_MAX);
- /* Make it work with an initial len == 0. */
- len = len * 2 + 4;
- *len_ptr = len;
- vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object));
+ vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX,
+ sizeof *vec);
*vec_ptr = vec;
+ len = *len_ptr;
}
else
inhibit_storing = 1;
{
if (extend)
{
- if ((OVERLAY_COUNT_MAX - 4) / 2 < len)
- memory_full (SIZE_MAX);
- /* Make it work with an initial len == 0. */
- len = len * 2 + 4;
- *len_ptr = len;
- vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object));
+ vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX,
+ sizeof *vec);
*vec_ptr = vec;
+ len = *len_ptr;
}
else
inhibit_storing = 1;
Either make it bigger, or don't store any more in it. */
if (extend)
{
- if ((OVERLAY_COUNT_MAX - 4) / 2 < len)
- memory_full (SIZE_MAX);
- /* Make it work with an initial len == 0. */
- len = len * 2 + 4;
- *len_ptr = len;
- vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object));
+ vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX,
+ sizeof *vec);
*vec_ptr = vec;
+ len = *len_ptr;
}
else
inhibit_storing = 1;
{
if (extend)
{
- if ((OVERLAY_COUNT_MAX - 4) / 2 < len)
- memory_full (SIZE_MAX);
- /* Make it work with an initial len == 0. */
- len = len * 2 + 4;
- *len_ptr = len;
- vec = (Lisp_Object *) xrealloc (vec, len * sizeof (Lisp_Object));
+ vec = xpalloc (vec, len_ptr, 1, OVERLAY_COUNT_MAX,
+ sizeof *vec);
*vec_ptr = vec;
+ len = *len_ptr;
}
else
inhibit_storing = 1;
return s1->beg < s2->beg ? -1 : 1;
if (s1->end != s2->end)
return s2->end < s1->end ? -1 : 1;
+ /* Avoid the non-determinism of qsort by choosing an arbitrary ordering
+ between "equal" overlays. The result can still change between
+ invocations of Emacs, but it won't change in the middle of
+ `find_field' (bug#6830). */
+ if (XHASH (s1->overlay) != XHASH (s2->overlay))
+ return XHASH (s1->overlay) < XHASH (s2->overlay) ? -1 : 1;
return 0;
}
struct sortstr *buf; /* An array that expands as needed; never freed. */
ptrdiff_t size; /* Allocated length of that array. */
ptrdiff_t used; /* How much of the array is currently in use. */
- EMACS_INT bytes; /* Total length of the strings in buf. */
+ ptrdiff_t bytes; /* Total length of the strings in buf. */
};
/* Buffers for storing information about the overlays touching a given
static unsigned char *overlay_str_buf;
/* Allocated length of overlay_str_buf. */
-static EMACS_INT overlay_str_len;
+static ptrdiff_t overlay_str_len;
/* A comparison function suitable for passing to qsort. */
static int
EMACS_INT nbytes;
if (ssl->used == ssl->size)
- {
- if (min (PTRDIFF_MAX, SIZE_MAX) / (sizeof (struct sortstr) * 2)
- < ssl->size)
- memory_full (SIZE_MAX);
- else if (0 < ssl->size)
- ssl->size *= 2;
- else
- ssl->size = 5;
- ssl->buf = ((struct sortstr *)
- xrealloc (ssl->buf, ssl->size * sizeof (struct sortstr)));
- }
+ ssl->buf = xpalloc (ssl->buf, &ssl->size, 5, -1, sizeof *ssl->buf);
ssl->buf[ssl->used].string = str;
ssl->buf[ssl->used].string2 = str2;
ssl->buf[ssl->used].size = size;
else
nbytes = SBYTES (str);
+ if (INT_ADD_OVERFLOW (ssl->bytes, nbytes))
+ memory_full (SIZE_MAX);
ssl->bytes += nbytes;
if (STRINGP (str2))
else
nbytes = SBYTES (str2);
+ if (INT_ADD_OVERFLOW (ssl->bytes, nbytes))
+ memory_full (SIZE_MAX);
ssl->bytes += nbytes;
}
}
Lisp_Object tem;
EMACS_INT i;
unsigned char *p;
- EMACS_INT total = overlay_heads.bytes + overlay_tails.bytes;
+ ptrdiff_t total;
+ if (INT_ADD_OVERFLOW (overlay_heads.bytes, overlay_tails.bytes))
+ memory_full (SIZE_MAX);
+ total = overlay_heads.bytes + overlay_tails.bytes;
if (total > overlay_str_len)
- {
- overlay_str_len = total;
- overlay_str_buf = (unsigned char *)xrealloc (overlay_str_buf,
- total);
- }
+ overlay_str_buf = xpalloc (overlay_str_buf, &overlay_str_len,
+ total - overlay_str_len, -1, 1);
+
p = overlay_str_buf;
for (i = overlay_tails.used; --i >= 0;)
{
static int mmap_page_size;
-/* 1 means mmap has been intialized. */
+/* 1 means mmap has been initialized. */
static int mmap_initialized_p;
is currently mapped. Used to prevent overwriting an existing
memory mapping.
- Default is to conservativly assume the address range is occupied by
+ Default is to conservatively assume the address range is occupied by
something else. This can be overridden by system configuration
files if system-specific means to determine this exists. */
#define MMAP_ALLOCATED_P(start, end) 1
#endif
-/* Function prototypes. */
+/* Perform necessary initializations for the use of mmap. */
-static int mmap_free_1 (struct mmap_region *);
-static int mmap_enlarge (struct mmap_region *, int);
-static struct mmap_region *mmap_find (POINTER_TYPE *, POINTER_TYPE *);
-static POINTER_TYPE *mmap_alloc (POINTER_TYPE **, size_t);
-static POINTER_TYPE *mmap_realloc (POINTER_TYPE **, size_t);
-static void mmap_free (POINTER_TYPE **ptr);
-static void mmap_init (void);
+static void
+mmap_init (void)
+{
+#if MAP_ANON == 0
+ /* The value of mmap_fd is initially 0 in temacs, and -1
+ in a dumped Emacs. */
+ if (mmap_fd <= 0)
+ {
+ /* No anonymous mmap -- we need the file descriptor. */
+ mmap_fd = open ("/dev/zero", O_RDONLY);
+ if (mmap_fd == -1)
+ fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno));
+ }
+#endif /* MAP_ANON == 0 */
+ if (mmap_initialized_p)
+ return;
+ mmap_initialized_p = 1;
+
+#if MAP_ANON != 0
+ mmap_fd = -1;
+#endif
+
+ mmap_page_size = getpagesize ();
+}
/* Return a region overlapping address range START...END, or null if
none. END is not including, i.e. the last byte in the range
is at END - 1. */
static struct mmap_region *
-mmap_find (start, end)
- POINTER_TYPE *start, *end;
+mmap_find (POINTER_TYPE *start, POINTER_TYPE *end)
{
struct mmap_region *r;
char *s = (char *) start, *e = (char *) end;
the region. Value is non-zero if successful. */
static int
-mmap_free_1 (r)
- struct mmap_region *r;
+mmap_free_1 (struct mmap_region *r)
{
if (r->next)
r->next->prev = r->prev;
Value is non-zero if successful. */
static int
-mmap_enlarge (r, npages)
- struct mmap_region *r;
- int npages;
+mmap_enlarge (struct mmap_region *r, int npages)
{
char *region_end = (char *) r + r->nbytes_mapped;
size_t nbytes;
when Emacs starts. */
void
-mmap_set_vars (restore_p)
- int restore_p;
+mmap_set_vars (int restore_p)
{
struct mmap_region *r;
return null. */
static POINTER_TYPE *
-mmap_alloc (var, nbytes)
- POINTER_TYPE **var;
- size_t nbytes;
+mmap_alloc (POINTER_TYPE **var, size_t nbytes)
{
void *p;
size_t map;
}
+/* Free a block of relocatable storage whose data is pointed to by
+ PTR. Store 0 in *PTR to show there's no block allocated. */
+
+static void
+mmap_free (POINTER_TYPE **var)
+{
+ mmap_init ();
+
+ if (*var)
+ {
+ mmap_free_1 (MMAP_REGION (*var));
+ *var = NULL;
+ }
+}
+
+
/* Given a pointer at address VAR to data allocated with mmap_alloc,
resize it to size NBYTES. Change *VAR to reflect the new block,
and return this value. If more memory cannot be allocated, then
leave *VAR unchanged, and return null. */
static POINTER_TYPE *
-mmap_realloc (var, nbytes)
- POINTER_TYPE **var;
- size_t nbytes;
+mmap_realloc (POINTER_TYPE **var, size_t nbytes)
{
POINTER_TYPE *result;
}
-/* Free a block of relocatable storage whose data is pointed to by
- PTR. Store 0 in *PTR to show there's no block allocated. */
-
-static void
-mmap_free (var)
- POINTER_TYPE **var;
-{
- mmap_init ();
-
- if (*var)
- {
- mmap_free_1 (MMAP_REGION (*var));
- *var = NULL;
- }
-}
-
-
-/* Perform necessary intializations for the use of mmap. */
-
-static void
-mmap_init ()
-{
-#if MAP_ANON == 0
- /* The value of mmap_fd is initially 0 in temacs, and -1
- in a dumped Emacs. */
- if (mmap_fd <= 0)
- {
- /* No anonymous mmap -- we need the file descriptor. */
- mmap_fd = open ("/dev/zero", O_RDONLY);
- if (mmap_fd == -1)
- fatal ("Cannot open /dev/zero: %s", emacs_strerror (errno));
- }
-#endif /* MAP_ANON == 0 */
-
- if (mmap_initialized_p)
- return;
- mmap_initialized_p = 1;
-
-#if MAP_ANON != 0
- mmap_fd = -1;
-#endif
-
- mmap_page_size = getpagesize ();
-}
-
#endif /* USE_MMAP_FOR_BUFFERS */
Buffer-text Allocation
***********************************************************************/
-#ifdef REL_ALLOC
-extern POINTER_TYPE *r_alloc (POINTER_TYPE **, size_t);
-extern POINTER_TYPE *r_re_alloc (POINTER_TYPE **, size_t);
-extern void r_alloc_free (POINTER_TYPE **ptr);
-#endif /* REL_ALLOC */
-
-
/* Allocate NBYTES bytes for buffer B's text buffer. */
static void
-alloc_buffer_text (struct buffer *b, size_t nbytes)
+alloc_buffer_text (struct buffer *b, ptrdiff_t nbytes)
{
POINTER_TYPE *p;
enlarge_buffer_text (struct buffer *b, EMACS_INT delta)
{
POINTER_TYPE *p;
- size_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1
- + delta);
+ ptrdiff_t nbytes = (BUF_Z_BYTE (b) - BUF_BEG_BYTE (b) + BUF_GAP_SIZE (b) + 1
+ + delta);
BLOCK_INPUT;
#if defined USE_MMAP_FOR_BUFFERS
p = mmap_realloc ((POINTER_TYPE **) &b->text->beg, nbytes);
BVAR (&buffer_defaults, truncate_lines) = Qnil;
BVAR (&buffer_defaults, word_wrap) = Qnil;
BVAR (&buffer_defaults, ctl_arrow) = Qt;
- BVAR (&buffer_defaults, bidi_display_reordering) = Qnil;
+ BVAR (&buffer_defaults, bidi_display_reordering) = Qt;
BVAR (&buffer_defaults, bidi_paragraph_direction) = Qnil;
BVAR (&buffer_defaults, cursor_type) = Qt;
BVAR (&buffer_defaults, extra_line_spacing) = Qnil;
This variable is buffer-local but you cannot set it directly;
use the function `set-buffer-multibyte' to change a buffer's representation.
-Changing its default value with `setq-default' is supported.
-See also variable `default-enable-multibyte-characters' and Info node
-`(elisp)Text Representations'. */);
+See also Info node `(elisp)Text Representations'. */);
XSYMBOL (intern_c_string ("enable-multibyte-characters"))->constant = 1;
DEFVAR_PER_BUFFER ("buffer-file-coding-system",
Note that this is overridden by the variable
`truncate-partial-width-windows' if that variable is non-nil
-and this buffer is not full-frame width. */);
+and this buffer is not full-frame width.
+
+Minibuffers set this variable to nil. */);
DEFVAR_PER_BUFFER ("word-wrap", &BVAR (current_buffer, word_wrap), Qnil,
doc: /* *Non-nil means to use word-wrapping for continuation lines.
doc: /* Hook run when the buffer list changes.
Functions running this hook are `get-buffer-create',
`make-indirect-buffer', `rename-buffer', `kill-buffer',
-`record-buffer' and `unrecord-buffer'. */);
+and `bury-buffer-internal'. */);
Vbuffer_list_update_hook = Qnil;
DEFSYM (Qbuffer_list_update_hook, "buffer-list-update-hook");
defsubr (&Sother_buffer);
defsubr (&Sbuffer_enable_undo);
defsubr (&Skill_buffer);
- defsubr (&Srecord_buffer);
- defsubr (&Sunrecord_buffer);
+ defsubr (&Sbury_buffer_internal);
defsubr (&Sset_buffer_major_mode);
defsubr (&Scurrent_buffer);
defsubr (&Sset_buffer);
HCoop / bpt / emacs.git / blobdiff