/* Buffer insertion/deletion and gap motion for GNU Emacs.
- Copyright (C) 1985-1986, 1993-1995, 1997-2011
+ Copyright (C) 1985-1986, 1993-1995, 1997-2012
Free Software Foundation, Inc.
This file is part of GNU Emacs.
int inherit);
static void gap_left (EMACS_INT charpos, EMACS_INT bytepos, int newgap);
static void gap_right (EMACS_INT charpos, EMACS_INT bytepos);
-static void adjust_markers_for_insert (EMACS_INT from, EMACS_INT from_byte,
- EMACS_INT to, EMACS_INT to_byte,
- int before_markers);
-static void adjust_markers_for_replace (EMACS_INT, EMACS_INT, EMACS_INT,
- EMACS_INT, EMACS_INT, EMACS_INT);
-static void adjust_point (EMACS_INT nchars, EMACS_INT nbytes);
static Lisp_Object Fcombine_after_change_execute (void);
- disordered overlays in the slot `overlays_before' of current_buffer. */
if (adjusted)
{
- fix_start_end_in_overlays(from, to);
+ fix_start_end_in_overlays (from, to);
fix_overlays_before (current_buffer, from, to);
}
}
}
\f
+void
+buffer_overflow (void)
+{
+ error ("Maximum buffer size exceeded");
+}
+
/* Make the gap NBYTES_ADDED bytes longer. */
static void
EMACS_INT real_gap_loc;
EMACS_INT real_gap_loc_byte;
EMACS_INT old_gap_size;
+ EMACS_INT current_size = Z_BYTE - BEG_BYTE + GAP_SIZE;
+ enum { enough_for_a_while = 2000 };
- /* If we have to get more space, get enough to last a while. */
- nbytes_added += 2000;
+ if (BUF_BYTES_MAX - current_size < nbytes_added)
+ buffer_overflow ();
- { EMACS_INT total_size = Z_BYTE - BEG_BYTE + GAP_SIZE + nbytes_added;
- if (total_size < 0
- /* Don't allow a buffer size that won't fit in a Lisp integer. */
- || total_size != XINT (make_number (total_size)))
- error ("Buffer exceeds maximum size");
- }
+ /* If we have to get more space, get enough to last a while;
+ but do not exceed the maximum buffer size. */
+ nbytes_added = min (nbytes_added + enough_for_a_while,
+ BUF_BYTES_MAX - current_size);
enlarge_buffer_text (current_buffer, nbytes_added);
return to_addr - initial_to_addr;
}
}
-
-/* Return the number of bytes it would take
- to convert some single-byte text to multibyte.
- The single-byte text consists of NBYTES bytes at PTR. */
-
-EMACS_INT
-count_size_as_multibyte (const unsigned char *ptr, EMACS_INT nbytes)
-{
- EMACS_INT i;
- EMACS_INT outgoing_nbytes = 0;
-
- for (i = 0; i < nbytes; i++)
- {
- unsigned int c = *ptr++;
- int n;
-
- if (ASCII_CHAR_P (c))
- n = 1;
- else
- {
- c = BYTE8_TO_CHAR (c);
- n = CHAR_BYTES (c);
- }
-
- if (INT_ADD_OVERFLOW (outgoing_nbytes, n))
- string_overflow ();
- outgoing_nbytes += n;
- }
-
- return outgoing_nbytes;
-}
\f
/* Insert a string of specified length before point.
This function judges multibyteness based on
insert_from_buffer_1 (struct buffer *buf,
EMACS_INT from, EMACS_INT nchars, int inherit)
{
- register Lisp_Object temp;
EMACS_INT chunk, chunk_expanded;
EMACS_INT from_byte = buf_charpos_to_bytepos (buf, from);
EMACS_INT to_byte = buf_charpos_to_bytepos (buf, from + nchars);
outgoing_nbytes = outgoing_before_gap + outgoing_after_gap;
}
- /* Make sure point-max won't overflow after this insertion. */
- XSETINT (temp, outgoing_nbytes + Z);
- if (outgoing_nbytes + Z != XINT (temp))
- error ("Maximum buffer size exceeded");
-
/* Do this before moving and increasing the gap,
because the before-change hooks might move the gap
or make it smaller. */
EMACS_INT insbytes = SBYTES (new);
EMACS_INT from_byte, to_byte;
EMACS_INT nbytes_del, nchars_del;
- register Lisp_Object temp;
struct gcpro gcpro1;
INTERVAL intervals;
EMACS_INT outgoing_insbytes = insbytes;
UNGCPRO;
- /* Make args be valid */
+ /* Make args be valid. */
if (from < BEGV)
from = BEGV;
if (to > ZV)
outgoing_insbytes
= count_size_as_multibyte (SDATA (new), insbytes);
- /* Make sure point-max won't overflow after this insertion. */
- XSETINT (temp, Z_BYTE - nbytes_del + insbytes);
- if (Z_BYTE - nbytes_del + insbytes != XINT (temp))
- error ("Maximum buffer size exceeded");
-
GCPRO1 (new);
/* Make sure the gap is somewhere in or next to what we are deleting. */
if (Z - GPT < END_UNCHANGED)
END_UNCHANGED = Z - GPT;
- if (GAP_SIZE < insbytes)
- make_gap (insbytes - GAP_SIZE);
+ if (GAP_SIZE < outgoing_insbytes)
+ make_gap (outgoing_insbytes - GAP_SIZE);
/* Copy the string text into the buffer, perhaps converting
between single-byte and multibyte. */
int markers)
{
EMACS_INT nbytes_del, nchars_del;
- Lisp_Object temp;
CHECK_MARKERS ();
if (nbytes_del <= 0 && insbytes == 0)
return;
- /* Make sure point-max won't overflow after this insertion. */
- XSETINT (temp, Z_BYTE - nbytes_del + insbytes);
- if (Z_BYTE - nbytes_del + insbytes != XINT (temp))
- error ("Maximum buffer size exceeded");
-
/* Make sure the gap is somewhere in or next to what we are deleting. */
if (from > GPT)
gap_right (from, from_byte);
to_byte = CHAR_TO_BYTE (to);
deletion = del_range_2 (from, from_byte, to, to_byte, ret_string);
- GCPRO1(deletion);
+ GCPRO1 (deletion);
signal_after_change (from, to - from, 0);
update_compositions (from, from, CHECK_HEAD);
UNGCPRO;
This affects `before-change-functions' and `after-change-functions',
as well as hooks attached to text properties and overlays. */);
inhibit_modification_hooks = 0;
- Qinhibit_modification_hooks = intern_c_string ("inhibit-modification-hooks");
- staticpro (&Qinhibit_modification_hooks);
+ DEFSYM (Qinhibit_modification_hooks, "inhibit-modification-hooks");
defsubr (&Scombine_after_change_execute);
}
HCoop / bpt / emacs.git / blobdiff