--- /dev/null
+/* Buffer manipulation primitives for XEmacs.
+ Copyright (C) 1985-1989, 1992-1995 Free Software Foundation, Inc.
+ Copyright (C) 1995 Sun Microsystems, Inc.
+ Copyright (C) 1995, 1996 Ben Wing.
+
+This file is part of XEmacs.
+
+XEmacs is free software; you can redistribute it and/or modify it
+under the terms of the GNU General Public License as published by the
+Free Software Foundation; either version 2, or (at your option) any
+later version.
+
+XEmacs is distributed in the hope that it will be useful, but WITHOUT
+ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
+for more details.
+
+You should have received a copy of the GNU General Public License
+along with XEmacs; see the file COPYING. If not, write to
+the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+Boston, MA 02111-1307, USA. */
+
+/* Synched up with: Mule 2.0, FSF 19.30. */
+
+/* Authorship:
+
+ FSF: long ago.
+ JWZ: some changes for Lemacs, long ago. (e.g. separate buffer
+ list per frame.)
+ Mly: a few changes for buffer-local vars, 19.8 or 19.9.
+ Ben Wing: some changes and cleanups for Mule, 19.12.
+ */
+
+/* This file contains functions that work with buffer objects.
+ Functions that manipulate a buffer's text, however, are not
+ in this file:
+
+ 1) The low-level functions that actually know about the
+ implementation of a buffer's text are located in insdel.c.
+ 2) The higher-level (mostly Lisp) functions that manipulate a
+ buffer's text are in editfns.c.
+ 3) The highest-level Lisp commands are in cmds.c.
+
+ However:
+
+ -- Functions that know about syntax tables (forward-word,
+ scan-sexps, etc.) are in syntax.c, as are functions
+ that manipulate syntax tables.
+ -- Functions that know about case tables (upcase, downcase,
+ etc.) are in casefiddle.c. Functions that manipulate
+ case tables (case-table-p, set-case-table, etc.) are
+ in casetab.c.
+ -- Functions that do searching and replacing are in
+ search.c. The low-level functions that implement
+ regular expressions are in regex.c.
+
+ Also:
+
+ -- Some file and process functions (in fileio.c and process.c)
+ copy text from or insert text into a buffer; they call
+ low-level functions in insdel.c to do this.
+ -- insdel.c calls low-level functions in undo.c and extents.c
+ to record buffer modifications for undoing and to handle
+ extent adjustment and extent-data creation and insertion.
+
+*/
+
+#include <config.h>
+#include "lisp.h"
+
+#include "buffer.h"
+#include "chartab.h"
+#include "casetab.h"
+#include "commands.h"
+#include "elhash.h"
+#include "extents.h"
+#include "faces.h"
+#ifdef FILE_CODING
+#include "file-coding.h"
+#endif
+#include "frame.h"
+#include "insdel.h"
+#include "lstream.h"
+#include "process.h" /* for kill_buffer_processes */
+#ifdef REGION_CACHE_NEEDS_WORK
+#include "region-cache.h"
+#endif
+#include "select.h" /* for select_notify_buffer_kill */
+#include "specifier.h"
+#include "syntax.h"
+#include "sysdep.h" /* for getwd */
+#include "window.h"
+
+#include "sysfile.h"
+
+struct buffer *current_buffer; /* the current buffer */
+
+/* This structure holds the default values of the buffer-local variables
+ defined with DEFVAR_BUFFER_LOCAL, that have special slots in each buffer.
+ The default value occupies the same slot in this structure
+ as an individual buffer's value occupies in that buffer.
+ Setting the default value also goes through the alist of buffers
+ and stores into each buffer that does not say it has a local value. */
+Lisp_Object Vbuffer_defaults;
+static void *buffer_defaults_saved_slots;
+
+/* This structure marks which slots in a buffer have corresponding
+ default values in Vbuffer_defaults.
+ Each such slot has a nonzero value in this structure.
+ The value has only one nonzero bit.
+
+ When a buffer has its own local value for a slot,
+ the bit for that slot (found in the same slot in this structure)
+ is turned on in the buffer's local_var_flags slot.
+
+ If a slot in this structure is 0, then there is a DEFVAR_BUFFER_LOCAL
+ for the slot, but there is no default value for it; the corresponding
+ slot in Vbuffer_defaults is not used except to initialize newly-created
+ buffers.
+
+ If a slot is -1, then there is a DEFVAR_BUFFER_LOCAL for it
+ as well as a default value which is used to initialize newly-created
+ buffers and as a reset-value when local-vars are killed.
+
+ If a slot is -2, there is no DEFVAR_BUFFER_LOCAL for it.
+ (The slot is always local, but there's no lisp variable for it.)
+ The default value is only used to initialize newly-creation buffers.
+
+ If a slot is -3, then there is no DEFVAR_BUFFER_LOCAL for it but
+ there is a default which is used to initialize newly-creation
+ buffers and as a reset-value when local-vars are killed. */
+struct buffer buffer_local_flags;
+
+/* This is the initial (startup) directory, as used for the *scratch* buffer.
+ We're making this a global to make others aware of the startup directory.
+ `initial_directory' is stored in external format.
+ */
+char initial_directory[MAXPATHLEN+1];
+
+/* This structure holds the names of symbols whose values may be
+ buffer-local. It is indexed and accessed in the same way as the above. */
+static Lisp_Object Vbuffer_local_symbols;
+static void *buffer_local_symbols_saved_slots;
+
+/* Alist of all buffer names vs the buffers. */
+/* This used to be a variable, but is no longer,
+ to prevent lossage due to user rplac'ing this alist or its elements.
+ Note that there is a per-frame copy of this as well; the frame slot
+ and the global variable contain the same data, but possibly in different
+ orders, so that the buffer ordering can be per-frame.
+ */
+Lisp_Object Vbuffer_alist;
+
+/* Functions to call before and after each text change. */
+Lisp_Object Qbefore_change_functions;
+Lisp_Object Qafter_change_functions;
+Lisp_Object Vbefore_change_functions;
+Lisp_Object Vafter_change_functions;
+
+/* #### Obsolete, for compatibility */
+Lisp_Object Qbefore_change_function;
+Lisp_Object Qafter_change_function;
+Lisp_Object Vbefore_change_function;
+Lisp_Object Vafter_change_function;
+
+#if 0 /* FSFmacs */
+Lisp_Object Vtransient_mark_mode;
+#endif
+
+/* t means ignore all read-only text properties.
+ A list means ignore such a property if its value is a member of the list.
+ Any non-nil value means ignore buffer-read-only. */
+Lisp_Object Vinhibit_read_only;
+
+/* List of functions to call that can query about killing a buffer.
+ If any of these functions returns nil, we don't kill it. */
+Lisp_Object Vkill_buffer_query_functions;
+
+/* Non-nil means delete a buffer's auto-save file when the buffer is saved. */
+int delete_auto_save_files;
+
+Lisp_Object Qbuffer_live_p;
+Lisp_Object Qbuffer_or_string_p;
+
+/* List of functions to call before changing an unmodified buffer. */
+Lisp_Object Vfirst_change_hook;
+Lisp_Object Qfirst_change_hook;
+
+Lisp_Object Qfundamental_mode;
+Lisp_Object Qmode_class;
+Lisp_Object Qpermanent_local;
+
+Lisp_Object Qprotected_field;
+
+Lisp_Object QSFundamental; /* A string "Fundamental" */
+Lisp_Object QSscratch; /* "*scratch*" */
+Lisp_Object Qdefault_directory;
+
+Lisp_Object Qkill_buffer_hook;
+
+Lisp_Object Qrename_auto_save_file;
+
+Lisp_Object Qget_file_buffer;
+Lisp_Object Qchange_major_mode_hook, Vchange_major_mode_hook;
+
+Lisp_Object Qfind_file_compare_truenames;
+
+Lisp_Object Qswitch_to_buffer;
+
+/* Two thresholds controlling how much undo information to keep. */
+Fixnum undo_threshold;
+Fixnum undo_high_threshold;
+
+int find_file_compare_truenames;
+int find_file_use_truenames;
+
+\f
+static void reset_buffer_local_variables (struct buffer *, int first_time);
+static void nuke_all_buffer_slots (struct buffer *b, Lisp_Object zap);
+
+Lisp_Object
+make_buffer (struct buffer *buf)
+{
+ Lisp_Object obj;
+ XSETBUFFER (obj, buf);
+ return obj;
+}
+
+static Lisp_Object
+mark_buffer (Lisp_Object obj)
+{
+ struct buffer *buf = XBUFFER (obj);
+
+ /* Truncate undo information. */
+ buf->undo_list = truncate_undo_list (buf->undo_list,
+ undo_threshold,
+ undo_high_threshold);
+
+#define MARKED_SLOT(x) mark_object (buf->x)
+#include "bufslots.h"
+#undef MARKED_SLOT
+
+ mark_object (buf->extent_info);
+ if (buf->text)
+ mark_object (buf->text->line_number_cache);
+
+ /* Don't mark normally through the children slot.
+ (Actually, in this case, it doesn't matter.) */
+ if (! EQ (buf->indirect_children, Qnull_pointer))
+ mark_conses_in_list (buf->indirect_children);
+
+ return buf->base_buffer ? make_buffer (buf->base_buffer) : Qnil;
+}
+
+static void
+print_buffer (Lisp_Object obj, Lisp_Object printcharfun, int escapeflag)
+{
+ struct buffer *b = XBUFFER (obj);
+
+ if (print_readably)
+ {
+ if (!BUFFER_LIVE_P (b))
+ error ("printing unreadable object #<killed buffer>");
+ else
+ error ("printing unreadable object #<buffer %s>",
+ XSTRING_DATA (b->name));
+ }
+ else if (!BUFFER_LIVE_P (b))
+ write_c_string ("#<killed buffer>", printcharfun);
+ else if (escapeflag)
+ {
+ write_c_string ("#<buffer ", printcharfun);
+ print_internal (b->name, printcharfun, 1);
+ write_c_string (">", printcharfun);
+ }
+ else
+ {
+ print_internal (b->name, printcharfun, 0);
+ }
+}
+
+/* We do not need a finalize method to handle a buffer's children list
+ because all buffers have `kill-buffer' applied to them before
+ they disappear, and the children removal happens then. */
+DEFINE_LRECORD_IMPLEMENTATION ("buffer", buffer,
+ mark_buffer, print_buffer, 0, 0, 0, 0,
+ struct buffer);
+\f
+DEFUN ("bufferp", Fbufferp, 1, 1, 0, /*
+Return t if OBJECT is an editor buffer.
+*/
+ (object))
+{
+ return BUFFERP (object) ? Qt : Qnil;
+}
+
+DEFUN ("buffer-live-p", Fbuffer_live_p, 1, 1, 0, /*
+Return t if OBJECT is an editor buffer that has not been deleted.
+*/
+ (object))
+{
+ return BUFFERP (object) && BUFFER_LIVE_P (XBUFFER (object)) ? Qt : Qnil;
+}
+
+static void
+nsberror (Lisp_Object spec)
+{
+ if (STRINGP (spec))
+ error ("No buffer named %s", XSTRING_DATA (spec));
+ signal_simple_error ("Invalid buffer argument", spec);
+}
+
+DEFUN ("buffer-list", Fbuffer_list, 0, 1, 0, /*
+Return a list of all existing live buffers.
+The order is specific to the selected frame; if the optional FRAME
+argument is provided, the ordering for that frame is returned instead.
+If the FRAME argument is t, then the global (non-frame) ordering is
+returned instead.
+*/
+ (frame))
+{
+ return Fmapcar (Qcdr,
+ EQ (frame, Qt) ? Vbuffer_alist :
+ decode_frame (frame)->buffer_alist);
+}
+
+Lisp_Object
+get_buffer (Lisp_Object name, int error_if_deleted_or_does_not_exist)
+{
+ if (BUFFERP (name))
+ {
+ if (!BUFFER_LIVE_P (XBUFFER (name)))
+ {
+ if (error_if_deleted_or_does_not_exist)
+ nsberror (name);
+ return Qnil;
+ }
+ return name;
+ }
+ else
+ {
+ Lisp_Object buf;
+ struct gcpro gcpro1;
+
+ CHECK_STRING (name);
+ name = LISP_GETTEXT (name); /* I18N3 */
+ GCPRO1 (name);
+ buf = Fcdr (Fassoc (name, Vbuffer_alist));
+ UNGCPRO;
+ if (NILP (buf) && error_if_deleted_or_does_not_exist)
+ nsberror (name);
+ return buf;
+ }
+}
+
+struct buffer *
+decode_buffer (Lisp_Object buffer, int allow_string)
+{
+ if (NILP (buffer) || (!POINTER_TYPE_P( XTYPE(buffer))))
+ return current_buffer;
+
+ if (allow_string && STRINGP (buffer))
+ return XBUFFER (get_buffer (buffer, 1));
+
+ CHECK_LIVE_BUFFER (buffer);
+ return XBUFFER (buffer);
+}
+
+DEFUN ("decode-buffer", Fdecode_buffer, 1, 1, 0, /*
+Validate BUFFER or if BUFFER is nil, return the current buffer.
+If BUFFER is a valid buffer or a string representing a valid buffer,
+the corresponding buffer object will be returned. Otherwise an error
+will be signaled.
+*/
+ (buffer))
+{
+ struct buffer *b = decode_buffer (buffer, 1);
+ XSETBUFFER (buffer, b);
+ return buffer;
+}
+
+#if 0 /* FSFmacs */
+/* bleagh!!! */
+/* Like Fassoc, but use Fstring_equal to compare
+ (which ignores text properties),
+ and don't ever QUIT. */
+
+static Lisp_Object
+assoc_ignore_text_properties (REGISTER Lisp_Object key, Lisp_Object list)
+{
+ REGISTER Lisp_Object tail;
+ for (tail = list; !NILP (tail); tail = Fcdr (tail))
+ {
+ REGISTER Lisp_Object elt, tem;
+ elt = Fcar (tail);
+ tem = Fstring_equal (Fcar (elt), key);
+ if (!NILP (tem))
+ return elt;
+ }
+ return Qnil;
+}
+
+#endif /* FSFmacs */
+
+DEFUN ("get-buffer", Fget_buffer, 1, 1, 0, /*
+Return the buffer named BUFFER-NAME (a string), or nil if there is none.
+BUFFER-NAME may also be a buffer; if so, the value is that buffer.
+*/
+ (buffer_name))
+{
+#ifdef I18N3
+ /* #### Doc string should indicate that the buffer name will get
+ translated. */
+#endif
+
+ /* #### This might return a dead buffer. This is gross. This is
+ called FSF compatibility. */
+ if (BUFFERP (buffer_name))
+ return buffer_name;
+ return get_buffer (buffer_name, 0);
+ /* FSFmacs 19.29 calls assoc_ignore_text_properties() here.
+ Bleagh!! */
+}
+
+\f
+DEFUN ("get-file-buffer", Fget_file_buffer, 1, 1, 0, /*
+Return the buffer visiting file FILENAME (a string).
+The buffer's `buffer-file-name' must match exactly the expansion of FILENAME.
+If there is no such live buffer, return nil.
+
+Normally, the comparison is done by canonicalizing FILENAME (using
+`expand-file-name') and comparing that to the value of `buffer-file-name'
+for each existing buffer. However, If `find-file-compare-truenames' is
+non-nil, FILENAME will be converted to its truename and the search will be
+done on each buffer's value of `buffer-file-truename' instead of
+`buffer-file-name'. Otherwise, if `find-file-use-truenames' is non-nil,
+FILENAME will be converted to its truename and used for searching, but
+the search will still be done on `buffer-file-name'.
+*/
+ (filename))
+{
+ /* This function can GC. GC checked and fixed 7-11-2000 ben. */
+ REGISTER Lisp_Object buf;
+ struct gcpro gcpro1;
+
+#ifdef I18N3
+ /* DO NOT translate the filename. */
+#endif
+ GCPRO1 (filename);
+ CHECK_STRING (filename);
+ filename = Fexpand_file_name (filename, Qnil);
+ {
+ /* If the file name has special constructs in it,
+ call the corresponding file handler. */
+ Lisp_Object handler = Ffind_file_name_handler (filename, Qget_file_buffer);
+ if (!NILP (handler))
+ {
+ UNGCPRO;
+ return call2 (handler, Qget_file_buffer, filename);
+ }
+ }
+ UNGCPRO;
+
+ if (find_file_compare_truenames || find_file_use_truenames)
+ {
+ struct gcpro ngcpro1, ngcpro2, ngcpro3;
+ Lisp_Object fn = Qnil;
+ Lisp_Object dn = Qnil;
+
+ NGCPRO3 (fn, dn, filename);
+ fn = Ffile_truename (filename, Qnil);
+ if (NILP (fn))
+ {
+ dn = Ffile_name_directory (filename);
+ fn = Ffile_truename (dn, Qnil);
+ if (! NILP (fn)) dn = fn;
+ /* Formerly the two calls below were combined, but that is
+ not GC-safe because the first call returns unprotected
+ data and the second call can GC. --ben */
+ fn = Ffile_name_nondirectory (filename);
+ fn = Fexpand_file_name (fn, dn);
+ }
+ filename = fn;
+ NUNGCPRO;
+ }
+
+ {
+ LIST_LOOP_2 (elt, Vbuffer_alist)
+ {
+ buf = Fcdr (elt);
+ if (!BUFFERP (buf)) continue;
+ if (!STRINGP (XBUFFER (buf)->filename)) continue;
+ if (!NILP (Fstring_equal (filename,
+ (find_file_compare_truenames
+ ? XBUFFER (buf)->file_truename
+ : XBUFFER (buf)->filename))))
+ return buf;
+ }
+ }
+ return Qnil;
+}
+
+
+static void
+push_buffer_alist (Lisp_Object name, Lisp_Object buf)
+{
+ Lisp_Object cons = Fcons (name, buf);
+ Lisp_Object frmcons, devcons, concons;
+
+ Vbuffer_alist = nconc2 (Vbuffer_alist, Fcons (cons, Qnil));
+ FRAME_LOOP_NO_BREAK (frmcons, devcons, concons)
+ {
+ struct frame *f;
+ f = XFRAME (XCAR (frmcons));
+ f->buffer_alist = nconc2 (f->buffer_alist, Fcons (cons, Qnil));
+ }
+}
+
+static void
+delete_from_buffer_alist (Lisp_Object buf)
+{
+ Lisp_Object cons = Frassq (buf, Vbuffer_alist);
+ Lisp_Object frmcons, devcons, concons;
+ if (NILP (cons))
+ return; /* ABORT() ? */
+ Vbuffer_alist = delq_no_quit (cons, Vbuffer_alist);
+
+ FRAME_LOOP_NO_BREAK (frmcons, devcons, concons)
+ {
+ struct frame *f;
+ f = XFRAME (XCAR (frmcons));
+ f->buffer_alist = delq_no_quit (cons, f->buffer_alist);
+ }
+}
+
+Lisp_Object
+get_truename_buffer (REGISTER Lisp_Object filename)
+{
+ /* This function can GC. GC correct 7-11-00 ben */
+ /* FSFmacs has its own code here and doesn't call get-file-buffer.
+ That's because their equivalent of find-file-compare-truenames
+ (find-file-existing-other-name) isn't looked at in get-file-buffer.
+ This way is more correct. */
+ int count = specpdl_depth ();
+
+ specbind (Qfind_file_compare_truenames, Qt);
+ return unbind_to (count, Fget_file_buffer (filename));
+}
+
+static struct buffer *
+allocate_buffer (void)
+{
+ struct buffer *b = alloc_lcrecord_type (struct buffer, &lrecord_buffer);
+
+ copy_lcrecord (b, XBUFFER (Vbuffer_defaults));
+
+ return b;
+}
+
+static Lisp_Object
+finish_init_buffer (struct buffer *b, Lisp_Object name)
+{
+ Lisp_Object buf;
+
+ XSETBUFFER (buf, b);
+
+ name = Fcopy_sequence (name);
+ /* #### This really does not need to be called. We already
+ initialized the buffer-local variables in allocate_buffer().
+ local_var_alist is set to Qnil at the same point, in
+ nuke_all_buffer_slots(). */
+ reset_buffer_local_variables (b, 1);
+ b->directory = current_buffer ? current_buffer->directory : Qnil;
+
+ b->last_window_start = 1;
+
+ b->name = name;
+ if (string_byte (XSTRING (name), 0) != ' ')
+ b->undo_list = Qnil;
+ else
+ b->undo_list = Qt;
+
+ /* initialize the extent list */
+ init_buffer_extents (b);
+
+ /* Put this in the alist of all live buffers. */
+ push_buffer_alist (name, buf);
+
+ init_buffer_markers (b);
+
+ b->generated_modeline_string = Fmake_string (make_int (84), make_int (' '));
+ b->modeline_extent_table = make_lisp_hash_table (20, HASH_TABLE_KEY_WEAK,
+ HASH_TABLE_EQ);
+
+ return buf;
+}
+
+DEFUN ("get-buffer-create", Fget_buffer_create, 1, 1, 0, /*
+Return the buffer named NAME, or create such a buffer and return it.
+A new buffer is created if there is no live buffer named NAME.
+If NAME starts with a space, the new buffer does not keep undo information.
+If NAME is a buffer instead of a string, then it is the value returned.
+The value is never nil.
+*/
+ (name))
+{
+ /* This function can GC */
+ Lisp_Object buf;
+ REGISTER struct buffer *b;
+
+#ifdef I18N3
+ /* #### Doc string should indicate that the buffer name will get
+ translated. */
+#endif
+
+ name = LISP_GETTEXT (name);
+ buf = Fget_buffer (name);
+ if (!NILP (buf))
+ return buf;
+
+ if (XSTRING_LENGTH (name) == 0)
+ error ("Empty string for buffer name is not allowed");
+
+ b = allocate_buffer ();
+
+ b->text = &b->own_text;
+ b->base_buffer = 0;
+ b->indirect_children = Qnil;
+ init_buffer_text (b);
+
+ return finish_init_buffer (b, name);
+}
+
+DEFUN ("make-indirect-buffer", Fmake_indirect_buffer, 2, 2,
+ "bMake indirect buffer (to buffer): \nBName of indirect buffer: ", /*
+Create and return an indirect buffer for buffer BASE-BUFFER, named NAME.
+BASE-BUFFER should be an existing buffer (or buffer name).
+NAME should be a string which is not the name of an existing buffer.
+
+If BASE-BUFFER is itself an indirect buffer, the base buffer for that buffer
+ is made the base buffer for the newly created buffer. (Thus, there will
+ never be indirect buffers whose base buffers are themselves indirect.)
+*/
+ (base_buffer, name))
+{
+ /* This function can GC */
+
+ /* #### The above interactive specification is totally bogus,
+ because it offers an existing buffer as default answer to the
+ second question. However, the second argument may not BE an
+ existing buffer! */
+ struct buffer *b;
+
+ base_buffer = get_buffer (base_buffer, 1);
+
+#ifdef I18N3
+ /* #### Doc string should indicate that the buffer name will get
+ translated. */
+#endif
+ CHECK_STRING (name);
+ name = LISP_GETTEXT (name);
+ if (!NILP (Fget_buffer (name)))
+ signal_simple_error ("Buffer name already in use", name);
+ if (XSTRING_LENGTH (name) == 0)
+ error ("Empty string for buffer name is not allowed");
+
+ b = allocate_buffer ();
+
+ b->base_buffer = BUFFER_BASE_BUFFER (XBUFFER (base_buffer));
+
+ /* Use the base buffer's text object. */
+ b->text = b->base_buffer->text;
+ b->indirect_children = Qnil;
+ b->base_buffer->indirect_children =
+ Fcons (make_buffer (b), b->base_buffer->indirect_children);
+ init_buffer_text (b);
+
+ return finish_init_buffer (b, name);
+}
+
+
+\f
+static void
+reset_buffer_local_variables (struct buffer *b, int first_time)
+{
+ struct buffer *def = XBUFFER (Vbuffer_defaults);
+
+ b->local_var_flags = 0;
+ /* For each slot that has a default value,
+ copy that into the slot. */
+#define MARKED_SLOT(slot) \
+ { int mask = XINT (buffer_local_flags.slot); \
+ if ((mask > 0 || mask == -1 || mask == -3) \
+ && (first_time \
+ || NILP (Fget (XBUFFER (Vbuffer_local_symbols)->slot, \
+ Qpermanent_local, Qnil)))) \
+ b->slot = def->slot; \
+ }
+#include "bufslots.h"
+#undef MARKED_SLOT
+}
+
+\f
+/* We split this away from generate-new-buffer, because rename-buffer
+ and set-visited-file-name ought to be able to use this to really
+ rename the buffer properly. */
+
+DEFUN ("generate-new-buffer-name", Fgenerate_new_buffer_name, 1, 2, 0, /*
+Return a string that is the name of no existing buffer based on NAME.
+If there is no live buffer named NAME, then return NAME.
+Otherwise modify name by appending `<NUMBER>', incrementing NUMBER
+until an unused name is found, and then return that name.
+Optional second argument IGNORE specifies a name that is okay to use
+\(if it is in the sequence to be tried)
+even if a buffer with that name exists.
+*/
+ (name, ignore))
+{
+ REGISTER Lisp_Object gentemp, tem;
+ int count;
+ char number[10];
+
+ CHECK_STRING (name);
+
+ name = LISP_GETTEXT (name);
+#ifdef I18N3
+ /* #### Doc string should indicate that the buffer name will get
+ translated. */
+#endif
+
+ tem = Fget_buffer (name);
+ if (NILP (tem))
+ return name;
+
+ count = 1;
+ while (1)
+ {
+ sprintf (number, "<%d>", ++count);
+ gentemp = concat2 (name, build_string (number));
+ if (!NILP (ignore))
+ {
+ tem = Fstring_equal (gentemp, ignore);
+ if (!NILP (tem))
+ return gentemp;
+ }
+ tem = Fget_buffer (gentemp);
+ if (NILP (tem))
+ return gentemp;
+ }
+}
+
+\f
+DEFUN ("buffer-name", Fbuffer_name, 0, 1, 0, /*
+Return the name of BUFFER, as a string.
+With no argument or nil as argument, return the name of the current buffer.
+*/
+ (buffer))
+{
+ /* For compatibility, we allow a dead buffer here.
+ Earlier versions of Emacs didn't provide buffer-live-p. */
+ if (NILP (buffer))
+ return current_buffer->name;
+ CHECK_BUFFER (buffer);
+ return XBUFFER (buffer)->name;
+}
+
+DEFUN ("buffer-file-name", Fbuffer_file_name, 0, 1, 0, /*
+Return name of file BUFFER is visiting, or nil if none.
+No argument or nil as argument means use the current buffer.
+*/
+ (buffer))
+{
+ /* For compatibility, we allow a dead buffer here. Yuck! */
+ if (NILP (buffer))
+ return current_buffer->filename;
+ CHECK_BUFFER (buffer);
+ return XBUFFER (buffer)->filename;
+}
+
+DEFUN ("buffer-base-buffer", Fbuffer_base_buffer, 0, 1, 0, /*
+Return the base buffer of indirect buffer BUFFER.
+If BUFFER is not indirect, return nil.
+*/
+ (buffer))
+{
+ struct buffer *buf = decode_buffer (buffer, 0);
+
+ return buf->base_buffer ? make_buffer (buf->base_buffer) : Qnil;
+}
+
+DEFUN ("buffer-indirect-children", Fbuffer_indirect_children, 0, 1, 0, /*
+Return a list of all indirect buffers whose base buffer is BUFFER.
+If BUFFER is indirect, the return value will always be nil; see
+`make-indirect-buffer'.
+*/
+ (buffer))
+{
+ struct buffer *buf = decode_buffer (buffer, 0);
+
+ return Fcopy_sequence (buf->indirect_children);
+}
+
+DEFUN ("buffer-local-variables", Fbuffer_local_variables, 0, 1, 0, /*
+Return an alist of variables that are buffer-local in BUFFER.
+Most elements look like (SYMBOL . VALUE), describing one variable.
+For a symbol that is locally unbound, just the symbol appears in the value.
+Note that storing new VALUEs in these elements doesn't change the variables.
+No argument or nil as argument means use current buffer as BUFFER.
+*/
+ (buffer))
+{
+ struct buffer *buf = decode_buffer (buffer, 0);
+ Lisp_Object result = Qnil;
+
+ {
+ Lisp_Object tail;
+ for (tail = buf->local_var_alist; CONSP (tail); tail = XCDR (tail))
+ {
+ Lisp_Object elt = XCAR (tail);
+ /* Reference each variable in the alist in buf.
+ If inquiring about the current buffer, this gets the current values,
+ so store them into the alist so the alist is up to date.
+ If inquiring about some other buffer, this swaps out any values
+ for that buffer, making the alist up to date automatically. */
+ Lisp_Object val = find_symbol_value (XCAR (elt));
+ /* Use the current buffer value only if buf is the current buffer. */
+ if (buf != current_buffer)
+ val = XCDR (elt);
+
+ /* If symbol is unbound, put just the symbol in the list. */
+ if (UNBOUNDP (val))
+ result = Fcons (XCAR (elt), result);
+ /* Otherwise, put (symbol . value) in the list. */
+ else
+ result = Fcons (Fcons (XCAR (elt), val), result);
+ }
+ }
+
+ /* Add on all the variables stored in special slots. */
+ {
+ struct buffer *syms = XBUFFER (Vbuffer_local_symbols);
+#define MARKED_SLOT(slot) \
+ { int mask = XINT (buffer_local_flags.slot); \
+ if (mask == 0 || mask == -1 \
+ || ((mask > 0) && (buf->local_var_flags & mask))) \
+ result = Fcons (Fcons (syms->slot, buf->slot), result); \
+ }
+#include "bufslots.h"
+#undef MARKED_SLOT
+ }
+ return result;
+}
+
+\f
+DEFUN ("buffer-modified-p", Fbuffer_modified_p, 0, 1, 0, /*
+Return t if BUFFER was modified since its file was last read or saved.
+No argument or nil as argument means use current buffer as BUFFER.
+*/
+ (buffer))
+{
+ struct buffer *buf = decode_buffer (buffer, 0);
+
+ return BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf) ? Qt : Qnil;
+}
+
+DEFUN ("set-buffer-modified-p", Fset_buffer_modified_p, 1, 2, 0, /*
+Mark BUFFER as modified or unmodified according to FLAG.
+A non-nil FLAG means mark the buffer modified. No argument or nil
+as BUFFER means use current buffer.
+*/
+ (flag, buffer))
+{
+ /* This function can GC */
+ struct buffer *buf = decode_buffer (buffer, 0);
+
+#ifdef CLASH_DETECTION
+ /* If buffer becoming modified, lock the file.
+ If buffer becoming unmodified, unlock the file. */
+
+ Lisp_Object fn = buf->file_truename;
+ if (!NILP (fn))
+ {
+ int already = BUF_SAVE_MODIFF (buf) < BUF_MODIFF (buf);
+ if (already == NILP (flag))
+ {
+ int count = specpdl_depth ();
+ /* lock_file() and unlock_file() currently use current_buffer */
+ /* #### - dmoore, what if lock_file or unlock_file kill
+ the current buffer? */
+ record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
+ set_buffer_internal (buf);
+ if (!already && !NILP (flag))
+ lock_file (fn);
+ else if (already && NILP (flag))
+ unlock_file (fn);
+ unbind_to (count, Qnil);
+ }
+ }
+#endif /* CLASH_DETECTION */
+
+ /* This is often called when the buffer contents are altered but we
+ don't want to treat the changes that way (e.g. selective
+ display). We still need to make sure redisplay realizes that the
+ contents have potentially altered and it needs to do some
+ work. */
+ buf = decode_buffer (buffer, 0);
+ BUF_MODIFF (buf)++;
+ BUF_SAVE_MODIFF (buf) = NILP (flag) ? BUF_MODIFF (buf) : 0;
+ MARK_MODELINE_CHANGED;
+
+ return flag;
+}
+
+DEFUN ("buffer-modified-tick", Fbuffer_modified_tick, 0, 1, 0, /*
+Return BUFFER's tick counter, incremented for each change in text.
+Each buffer has a tick counter which is incremented each time the text in
+that buffer is changed. It wraps around occasionally.
+No argument or nil as argument means use current buffer as BUFFER.
+*/
+ (buffer))
+{
+ struct buffer *buf = decode_buffer (buffer, 0);
+
+ return make_int (BUF_MODIFF (buf));
+}
+\f
+DEFUN ("rename-buffer", Frename_buffer, 1, 2,
+ "sRename buffer (to new name): \nP", /*
+Change current buffer's name to NEWNAME (a string).
+If second arg UNIQUE is nil or omitted, it is an error if a
+buffer named NEWNAME already exists.
+If UNIQUE is non-nil, come up with a new name using
+`generate-new-buffer-name'.
+Interactively, one can set UNIQUE with a prefix argument.
+Returns the name we actually gave the buffer.
+This does not change the name of the visited file (if any).
+*/
+ (newname, unique))
+{
+ /* This function can GC */
+ Lisp_Object tem, buf;
+
+#ifdef I18N3
+ /* #### Doc string should indicate that the buffer name will get
+ translated. */
+#endif
+ CHECK_STRING (newname);
+ newname = LISP_GETTEXT (newname);
+
+ if (XSTRING_LENGTH (newname) == 0)
+ error ("Empty string is invalid as a buffer name");
+
+ tem = Fget_buffer (newname);
+ /* Don't short-circuit if UNIQUE is t. That is a useful way to rename
+ the buffer automatically so you can create another with the original name.
+ It makes UNIQUE equivalent to
+ (rename-buffer (generate-new-buffer-name NEWNAME)). */
+ /* XEmacs change: added check for nil */
+ if (NILP (unique) && !NILP (tem) && XBUFFER (tem) == current_buffer)
+ return current_buffer->name;
+ if (!NILP (tem))
+ {
+ if (!NILP (unique))
+ newname = Fgenerate_new_buffer_name (newname, current_buffer->name);
+ else
+ error ("Buffer name \"%s\" is in use",
+ XSTRING_DATA (newname));
+ }
+
+ current_buffer->name = newname;
+
+ /* Catch redisplay's attention. Unless we do this, the modelines for
+ any windows displaying current_buffer will stay unchanged. */
+ MARK_MODELINE_CHANGED;
+
+ buf = Fcurrent_buffer ();
+
+ /* The aconses in the Vbuffer_alist are shared with frame->buffer_alist,
+ so this will change it in the per-frame ordering as well. */
+ Fsetcar (Frassq (buf, Vbuffer_alist), newname);
+
+ if (NILP (current_buffer->filename)
+ && !NILP (current_buffer->auto_save_file_name))
+ call0 (Qrename_auto_save_file);
+ /* refetch since that last call may have done GC */
+ /* (hypothetical relocating GC) */
+ return current_buffer->name;
+}
+
+DEFUN ("other-buffer", Fother_buffer, 0, 3, 0, /*
+Return most recently selected buffer other than BUFFER.
+Buffers not visible in windows are preferred to visible buffers,
+unless optional third argument VISIBLE-OK is non-nil.
+If no other buffer exists, the buffer `*scratch*' is returned.
+If BUFFER is omitted or nil, some interesting buffer is returned.
+
+The ordering is for this frame; If second optional argument FRAME
+is provided, then the ordering is for that frame. If the second arg
+is t, then the global ordering is returned.
+
+Note: In FSF Emacs, this function takes the arguments in the order of
+BUFFER, VISIBLE-OK and FRAME.
+*/
+ (buffer, frame, visible_ok))
+{
+ /* This function can GC */
+ Lisp_Object tail, buf, notsogood, tem;
+ Lisp_Object alist;
+
+ notsogood = Qnil;
+
+ if (EQ (frame, Qt))
+ alist = Vbuffer_alist;
+ else
+ {
+ struct frame *f = decode_frame (frame);
+
+ XSETFRAME (frame, f);
+ alist = f->buffer_alist;
+ }
+
+ for (tail = alist; !NILP (tail); tail = Fcdr (tail))
+ {
+ buf = Fcdr (Fcar (tail));
+ if (EQ (buf, buffer))
+ continue;
+ if (string_byte (XSTRING (XBUFFER (buf)->name), 0) == ' ')
+ continue;
+ /* If FRAME has a buffer_predicate,
+ disregard buffers that don't fit the predicate. */
+ if (FRAMEP (frame))
+ {
+ tem = XFRAME (frame)->buffer_predicate;
+ if (!NILP (tem))
+ {
+ tem = call1 (tem, buf);
+ if (NILP (tem))
+ continue;
+ }
+ }
+
+ if (NILP (visible_ok))
+ {
+ /* get-buffer-window will handle nil or t frame */
+ tem = Fget_buffer_window (buf, frame, Qnil);
+ }
+ else
+ tem = Qnil;
+ if (NILP (tem))
+ return buf;
+ if (NILP (notsogood))
+ notsogood = buf;
+ }
+ if (!NILP (notsogood))
+ return notsogood;
+ return Fget_buffer_create (QSscratch);
+}
+\f
+DEFUN ("buffer-disable-undo", Fbuffer_disable_undo, 0, 1, "", /*
+Stop keeping undo information for BUFFER.
+Any undo records it already has are discarded.
+No argument or nil as argument means do this for the current buffer.
+*/
+ (buffer))
+{
+ /* Allowing nil is an RMSism */
+ struct buffer *real_buf = decode_buffer (buffer, 1);
+ real_buf->undo_list = Qt;
+ return Qnil;
+}
+
+DEFUN ("buffer-enable-undo", Fbuffer_enable_undo, 0, 1, "", /*
+Start keeping undo information for BUFFER.
+No argument or nil as argument means do this for the current buffer.
+*/
+ (buffer))
+{
+ /* Allowing nil is an RMSism */
+ struct buffer *real_buf = decode_buffer (buffer, 1);
+ if (EQ (real_buf->undo_list, Qt))
+ real_buf->undo_list = Qnil;
+
+ return Qnil;
+}
+
+DEFUN ("kill-buffer", Fkill_buffer, 1, 1, "bKill buffer: ", /*
+Kill the buffer BUFFER.
+The argument may be a buffer or may be the name of a buffer.
+An argument of nil means kill the current buffer.
+
+Value is t if the buffer is actually killed, nil if user says no.
+
+The value of `kill-buffer-hook' (which may be local to that buffer),
+if not void, is a list of functions to be called, with no arguments,
+before the buffer is actually killed. The buffer to be killed is current
+when the hook functions are called.
+
+Any processes that have this buffer as the `process-buffer' are killed
+with `delete-process'.
+*/
+ (buffer))
+{
+ /* This function can call lisp */
+ Lisp_Object buf;
+ REGISTER struct buffer *b;
+ struct gcpro gcpro1, gcpro2;
+
+ if (NILP (buffer))
+ buf = Fcurrent_buffer ();
+ else if (BUFFERP (buffer))
+ buf = buffer;
+ else
+ {
+ buf = get_buffer (buffer, 0);
+ if (NILP (buf)) nsberror (buffer);
+ }
+
+ b = XBUFFER (buf);
+
+ /* OK to delete an already-deleted buffer. */
+ if (!BUFFER_LIVE_P (b))
+ return Qnil;
+
+ /* Don't kill the minibuffer now current. */
+ if (EQ (buf, Vminibuffer_zero))
+ return Qnil;
+
+ /* Or the echo area. */
+ if (EQ (buf, Vecho_area_buffer))
+ return Qnil;
+
+ /* Query if the buffer is still modified. */
+ if (INTERACTIVE && !NILP (b->filename)
+ && BUF_MODIFF (b) > BUF_SAVE_MODIFF (b))
+ {
+ Lisp_Object killp;
+ GCPRO1 (buf);
+ killp = call1
+ (Qyes_or_no_p,
+ (emacs_doprnt_string_c
+ ((const Bufbyte *) GETTEXT ("Buffer %s modified; kill anyway? "),
+ Qnil, -1, XSTRING_DATA (b->name))));
+ UNGCPRO;
+ if (NILP (killp))
+ return Qnil;
+ b = XBUFFER (buf); /* Hypothetical relocating GC. */
+ }
+
+ /* Run hooks with the buffer to be killed temporarily selected,
+ unless the buffer is already dead (could have been deleted
+ in the question above).
+ */
+ if (BUFFER_LIVE_P (b))
+ {
+ int speccount = specpdl_depth ();
+ Lisp_Object tail = Qnil;
+
+ GCPRO2 (buf, tail);
+ record_unwind_protect (save_excursion_restore, save_excursion_save ());
+ Fset_buffer (buf);
+
+ /* First run the query functions; if any query is answered no,
+ don't kill the buffer. */
+ EXTERNAL_LIST_LOOP (tail, Vkill_buffer_query_functions)
+ {
+ if (NILP (call0 (Fcar (tail))))
+ {
+ UNGCPRO;
+ return unbind_to (speccount, Qnil);
+ }
+ }
+
+ /* Then run the hooks. */
+ run_hook (Qkill_buffer_hook);
+
+ /* Inform the selection code that a buffer just got killed.
+ We do this in C because (a) it's faster, and (b) it needs
+ to access data internal to select.c that can't be seen from
+ Lisp (so the Lisp code would just call into C anyway. */
+ select_notify_buffer_kill (buf);
+
+ unbind_to (speccount, Qnil);
+ UNGCPRO;
+ b = XBUFFER (buf); /* Hypothetical relocating GC. */
+ }
+
+ /* We have no more questions to ask. Verify that it is valid
+ to kill the buffer. This must be done after the questions
+ since anything can happen within yes-or-no-p. */
+
+ /* Might have been deleted during the last question above */
+ if (!BUFFER_LIVE_P (b))
+ return Qnil;
+
+ /* Don't kill the minibuffer now current. */
+ if (EQ (buf, XWINDOW (minibuf_window)->buffer))
+ return Qnil;
+
+ /* When we kill a base buffer, kill all its indirect buffers.
+ We do it at this stage so nothing terrible happens if they
+ ask questions or their hooks get errors. */
+ if (! b->base_buffer)
+ {
+ Lisp_Object rest;
+
+ GCPRO1 (buf);
+
+ LIST_LOOP (rest, b->indirect_children)
+ {
+ Fkill_buffer (XCAR (rest));
+ /* Keep indirect_children updated in case a
+ query-function/hook throws. */
+ b->indirect_children = XCDR (rest);
+ }
+
+ UNGCPRO;
+ }
+
+ /* 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)
+ {
+ Fset_buffer (Fother_buffer (buf, Qnil, Qnil));
+ if (b == current_buffer)
+ return Qnil;
+ }
+
+ /* Now there is no question: we can kill the buffer. */
+
+#ifdef CLASH_DETECTION
+ /* Unlock this buffer's file, if it is locked. unlock_buffer
+ can both GC and kill the current buffer, and wreak general
+ havok by running lisp code. */
+ GCPRO1 (buf);
+ unlock_buffer (b);
+ UNGCPRO;
+ b = XBUFFER (buf);
+
+ if (!BUFFER_LIVE_P (b))
+ return Qnil;
+
+ if (b == current_buffer)
+ {
+ Fset_buffer (Fother_buffer (buf, Qnil, Qnil));
+ if (b == current_buffer)
+ return Qnil;
+ }
+#endif /* CLASH_DETECTION */
+
+ {
+ int speccount = specpdl_depth ();
+ specbind (Qinhibit_quit, Qt);
+
+ kill_buffer_processes (buf);
+
+ delete_from_buffer_alist (buf);
+
+ /* Undedicate any windows of this buffer, and make sure no windows
+ show it. */
+
+ undedicate_windows (buf, Qt);
+
+ GCPRO1 (buf);
+ Freplace_buffer_in_windows (buf, Qnil, Qall);
+ UNGCPRO;
+
+ font_lock_buffer_was_killed (b);
+
+ /* Delete any auto-save file, if we saved it in this session. */
+ if (STRINGP (b->auto_save_file_name)
+ && b->auto_save_modified != 0
+ && BUF_SAVE_MODIFF (b) < b->auto_save_modified)
+ {
+ if (delete_auto_save_files != 0)
+ {
+ /* deleting the auto save file might kill b! */
+ /* #### dmoore - fix this crap, we do this same gcpro and
+ buffer liveness check multiple times. Let's get a
+ macro or something for it. */
+ GCPRO1 (buf);
+ internal_delete_file (b->auto_save_file_name);
+ UNGCPRO;
+ b = XBUFFER (buf);
+
+ if (!BUFFER_LIVE_P (b))
+ return Qnil;
+
+ if (b == current_buffer)
+ {
+ Fset_buffer (Fother_buffer (buf, Qnil, Qnil));
+ if (b == current_buffer)
+ return Qnil;
+ }
+ }
+ }
+
+ uninit_buffer_markers (b);
+
+ kill_buffer_local_variables (b);
+
+ b->name = Qnil;
+ uninit_buffer_text (b);
+ b->undo_list = Qnil;
+ uninit_buffer_extents (b);
+ if (b->base_buffer)
+ {
+#ifdef ERROR_CHECK_BUFPOS
+ assert (!NILP (memq_no_quit (buf, b->base_buffer->indirect_children)));
+#endif
+ b->base_buffer->indirect_children =
+ delq_no_quit (buf, b->base_buffer->indirect_children);
+ }
+
+ /* Clear away all Lisp objects, so that they
+ won't be protected from GC. */
+ nuke_all_buffer_slots (b, Qnil);
+
+ unbind_to (speccount, Qnil);
+ }
+ return Qt;
+}
+\f
+DEFUN ("record-buffer", Frecord_buffer, 1, 1, 0, /*
+Place buffer BUFFER first in the buffer order.
+Call this function when a buffer is selected "visibly".
+
+This function changes the global buffer order and the per-frame buffer
+order for the selected frame. The buffer order keeps track of recency
+of selection so that `other-buffer' will return a recently selected
+buffer. See `other-buffer' for more information.
+*/
+ (buffer))
+{
+ REGISTER Lisp_Object lynk, prev;
+ struct frame *f = selected_frame ();
+ int buffer_found = 0;
+
+ CHECK_BUFFER (buffer);
+ if (!BUFFER_LIVE_P (XBUFFER (buffer)))
+ return Qnil;
+ prev = Qnil;
+ for (lynk = Vbuffer_alist; CONSP (lynk); lynk = XCDR (lynk))
+ {
+ if (EQ (XCDR (XCAR (lynk)), buffer))
+ {
+ buffer_found = 1;
+ break;
+ }
+ prev = lynk;
+ }
+ if (buffer_found)
+ {
+ /* Effectively do Vbuffer_alist = delq_no_quit (lynk, Vbuffer_alist) */
+ if (NILP (prev))
+ Vbuffer_alist = XCDR (Vbuffer_alist);
+ else
+ XCDR (prev) = XCDR (XCDR (prev));
+ XCDR (lynk) = Vbuffer_alist;
+ Vbuffer_alist = lynk;
+ }
+ else
+ Vbuffer_alist = Fcons (Fcons (Fbuffer_name(buffer), buffer), Vbuffer_alist);
+
+ /* That was the global one. Now do the same thing for the
+ per-frame buffer-alist. */
+ buffer_found = 0;
+ prev = Qnil;
+ for (lynk = f->buffer_alist; CONSP (lynk); lynk = XCDR (lynk))
+ {
+ if (EQ (XCDR (XCAR (lynk)), buffer))
+ {
+ buffer_found = 1;
+ break;
+ }
+ prev = lynk;
+ }
+ if (buffer_found)
+ {
+ /* Effectively do f->buffer_alist = delq_no_quit (lynk, f->buffer_alist) */
+ if (NILP (prev))
+ f->buffer_alist = XCDR (f->buffer_alist);
+ else
+ XCDR (prev) = XCDR (XCDR (prev));
+ XCDR (lynk) = f->buffer_alist;
+ f->buffer_alist = lynk;
+ }
+ else
+ f->buffer_alist = Fcons (Fcons (Fbuffer_name(buffer), buffer),
+ f->buffer_alist);
+
+ return Qnil;
+}
+
+DEFUN ("set-buffer-major-mode", Fset_buffer_major_mode, 1, 1, 0, /*
+Set an appropriate major mode for BUFFER, according to `default-major-mode'.
+Use this function before selecting the buffer, since it may need to inspect
+the current buffer's major mode.
+*/
+ (buffer))
+{
+ int speccount = specpdl_depth ();
+ Lisp_Object function = XBUFFER (Vbuffer_defaults)->major_mode;
+
+ if (NILP (function))
+ {
+ Lisp_Object tem = Fget (current_buffer->major_mode, Qmode_class, Qnil);
+ if (NILP (tem))
+ function = current_buffer->major_mode;
+ }
+
+ if (NILP (function) || EQ (function, Qfundamental_mode))
+ return Qnil;
+
+ /* To select a nonfundamental mode,
+ select the buffer temporarily and then call the mode function. */
+
+ record_unwind_protect (Fset_buffer, Fcurrent_buffer ());
+
+ Fset_buffer (buffer);
+ call0 (function);
+
+ return unbind_to (speccount, Qnil);
+}
+
+void
+switch_to_buffer (Lisp_Object bufname, Lisp_Object norecord)
+{
+ call2 (Qswitch_to_buffer, bufname, norecord);
+}
+
+
+DEFUN ("current-buffer", Fcurrent_buffer, 0, 0, 0, /*
+Return the current buffer as a Lisp object.
+*/
+ ())
+{
+ Lisp_Object buffer;
+ XSETBUFFER (buffer, current_buffer);
+ return buffer;
+}
+\f
+/* Set the current buffer to B. */
+
+void
+set_buffer_internal (struct buffer *b)
+{
+ REGISTER struct buffer *old_buf;
+ REGISTER Lisp_Object tail;
+
+ if (current_buffer == b)
+ return;
+
+ INVALIDATE_PIXEL_TO_GLYPH_CACHE;
+
+ old_buf = current_buffer;
+ current_buffer = b;
+ invalidate_current_column (); /* invalidate indentation cache */
+
+ if (old_buf)
+ {
+ /* Put the undo list back in the base buffer, so that it appears
+ that an indirect buffer shares the undo list of its base. */
+ if (old_buf->base_buffer)
+ old_buf->base_buffer->undo_list = old_buf->undo_list;
+ }
+
+ /* Get the undo list from the base buffer, so that it appears
+ that an indirect buffer shares the undo list of its base. */
+ if (b->base_buffer)
+ b->undo_list = b->base_buffer->undo_list;
+
+ /* Look down buffer's list of local Lisp variables
+ to find and update any that forward into C variables. */
+
+ LIST_LOOP (tail, b->local_var_alist)
+ {
+ Lisp_Object sym = XCAR (XCAR (tail));
+ Lisp_Object valcontents = XSYMBOL (sym)->value;
+ if (SYMBOL_VALUE_MAGIC_P (valcontents))
+ {
+ /* Just reference the variable
+ to cause it to become set for this buffer. */
+ /* Use find_symbol_value_quickly to avoid an unnecessary O(n)
+ lookup. */
+ (void) find_symbol_value_quickly (XCAR (tail), 1);
+ }
+ }
+
+ /* Do the same with any others that were local to the previous buffer */
+
+ if (old_buf)
+ {
+ LIST_LOOP (tail, old_buf->local_var_alist)
+ {
+ Lisp_Object sym = XCAR (XCAR (tail));
+ Lisp_Object valcontents = XSYMBOL (sym)->value;
+
+ if (SYMBOL_VALUE_MAGIC_P (valcontents))
+ {
+ /* Just reference the variable
+ to cause it to become set for this buffer. */
+ /* Use find_symbol_value_quickly with find_it_p as 0 to avoid an
+ unnecessary O(n) lookup which is guaranteed to be worst case.
+ Any symbols which are local are guaranteed to have been
+ handled in the previous loop, above. */
+ (void) find_symbol_value_quickly (sym, 0);
+ }
+ }
+ }
+}
+
+DEFUN ("set-buffer", Fset_buffer, 1, 1, 0, /*
+Make the buffer BUFFER current for editing operations.
+BUFFER may be a buffer or the name of an existing buffer.
+See also `save-excursion' when you want to make a buffer current temporarily.
+This function does not display the buffer, so its effect ends
+when the current command terminates.
+Use `switch-to-buffer' or `pop-to-buffer' to switch buffers permanently.
+*/
+ (buffer))
+{
+ buffer = get_buffer (buffer, 0);
+ if (NILP (buffer))
+ error ("Selecting deleted or non-existent buffer");
+ set_buffer_internal (XBUFFER (buffer));
+ return buffer;
+}
+
+\f
+DEFUN ("barf-if-buffer-read-only", Fbarf_if_buffer_read_only, 0, 3, 0, /*
+Signal a `buffer-read-only' error if BUFFER is read-only.
+Optional argument BUFFER defaults to the current buffer.
+
+If optional argument START is non-nil, all extents in the buffer
+which overlap that part of the buffer are checked to ensure none has a
+`read-only' property. (Extents that lie completely within the range,
+however, are not checked.) END defaults to the value of START.
+
+If START and END are equal, the range checked is [START, END] (i.e.
+closed on both ends); otherwise, the range checked is (START, END)
+\(open on both ends), except that extents that lie completely within
+[START, END] are not checked. See `extent-in-region-p' for a fuller
+discussion.
+*/
+ (buffer, start, end))
+{
+ struct buffer *b = decode_buffer (buffer, 0);
+ Bufpos s, e;
+
+ if (NILP (start))
+ s = e = -1;
+ else
+ {
+ if (NILP (end))
+ end = start;
+ get_buffer_range_char (b, start, end, &s, &e, 0);
+ }
+ barf_if_buffer_read_only (b, s, e);
+
+ return Qnil;
+}
+
+static void
+bury_buffer_1 (Lisp_Object buffer, Lisp_Object before,
+ Lisp_Object *buffer_alist)
+{
+ Lisp_Object aelt = rassq_no_quit (buffer, *buffer_alist);
+ Lisp_Object lynk = memq_no_quit (aelt, *buffer_alist);
+ Lisp_Object iter, before_before;
+
+ *buffer_alist = delq_no_quit (aelt, *buffer_alist);
+ for (before_before = Qnil, iter = *buffer_alist;
+ !NILP (iter) && !EQ (XCDR (XCAR (iter)), before);
+ before_before = iter, iter = XCDR (iter))
+ ;
+ XCDR (lynk) = iter;
+ if (!NILP (before_before))
+ XCDR (before_before) = lynk;
+ else
+ *buffer_alist = lynk;
+}
+
+DEFUN ("bury-buffer", Fbury_buffer, 0, 2, "", /*
+Put BUFFER at the end of the list of all buffers.
+There it is the least likely candidate for `other-buffer' to return;
+thus, the least likely buffer for \\[switch-to-buffer] to select by default.
+If BUFFER is nil or omitted, bury the current buffer.
+Also, if BUFFER is nil or omitted, remove the current buffer from the
+selected window if it is displayed there.
+Because of this, you may need to specify (current-buffer) as
+BUFFER when calling from minibuffer.
+If BEFORE is non-nil, it specifies a buffer before which BUFFER
+will be placed, instead of being placed at the end.
+*/
+ (buffer, before))
+{
+ /* This function can GC */
+ struct buffer *buf = decode_buffer (buffer, 1);
+ /* If we're burying the current buffer, unshow it. */
+ /* Note that the behavior of (bury-buffer nil) and
+ (bury-buffer (current-buffer)) is not the same.
+ This is illogical but is historical. Changing it
+ breaks mh-e and TeX and such packages. */
+ if (NILP (buffer))
+ switch_to_buffer (Fother_buffer (Fcurrent_buffer (), Qnil, Qnil), Qnil);
+ XSETBUFFER (buffer, buf);
+
+ if (!NILP (before))
+ before = get_buffer (before, 1);
+
+ if (EQ (before, buffer))
+ error ("Cannot place a buffer before itself");
+
+ bury_buffer_1 (buffer, before, &Vbuffer_alist);
+ bury_buffer_1 (buffer, before, &selected_frame ()->buffer_alist);
+
+ return Qnil;
+}
+
+\f
+DEFUN ("erase-buffer", Ferase_buffer, 0, 1, "*", /*
+Delete the entire contents of the BUFFER.
+Any clipping restriction in effect (see `narrow-to-region') is removed,
+so the buffer is truly empty after this.
+BUFFER defaults to the current buffer if omitted.
+*/
+ (buffer))
+{
+ /* This function can GC */
+ struct buffer *b = decode_buffer (buffer, 1);
+ /* #### yuck yuck yuck. This is gross. The old echo-area code,
+ however, was the only place that called erase_buffer() with a
+ non-zero NO_CLIP argument.
+
+ Someone needs to fix up the redisplay code so it is smarter
+ about this, so that the NO_CLIP junk isn't necessary. */
+ int no_clip = (b == XBUFFER (Vecho_area_buffer));
+
+ INVALIDATE_PIXEL_TO_GLYPH_CACHE;
+
+ widen_buffer (b, no_clip);
+ buffer_delete_range (b, BUF_BEG (b), BUF_Z (b), 0);
+ b->last_window_start = 1;
+
+ /* Prevent warnings, or suspension of auto saving, that would happen
+ if future size is less than past size. Use of erase-buffer
+ implies that the future text is not really related to the past text. */
+ b->saved_size = Qzero;
+
+ return Qnil;
+}
+
+\f
+
+DEFUN ("kill-all-local-variables", Fkill_all_local_variables, 0, 0, 0, /*
+Switch to Fundamental mode by killing current buffer's local variables.
+Most local variable bindings are eliminated so that the default values
+become effective once more. Also, the syntax table is set from
+`standard-syntax-table', the category table is set from
+`standard-category-table' (if support for Mule exists), local keymap is set
+to nil, the abbrev table is set from `fundamental-mode-abbrev-table',
+and all specifier specifications whose locale is the current buffer
+are removed. This function also forces redisplay of the modeline.
+
+Every function to select a new major mode starts by
+calling this function.
+
+As a special exception, local variables whose names have
+a non-nil `permanent-local' property are not eliminated by this function.
+
+The first thing this function does is run
+the normal hook `change-major-mode-hook'.
+*/
+ ())
+{
+ /* This function can GC */
+ run_hook (Qchange_major_mode_hook);
+
+ reset_buffer_local_variables (current_buffer, 0);
+
+ kill_buffer_local_variables (current_buffer);
+
+ kill_specifier_buffer_locals (Fcurrent_buffer ());
+
+ /* Force modeline redisplay. Useful here because all major mode
+ commands call this function. */
+ MARK_MODELINE_CHANGED;
+
+ return Qnil;
+}
+
+#ifdef MEMORY_USAGE_STATS
+
+struct buffer_stats
+{
+ int text;
+ int markers;
+ int extents;
+ int other;
+};
+
+static size_t
+compute_buffer_text_usage (struct buffer *b, struct overhead_stats *ovstats)
+{
+ int was_requested = b->text->z - 1;
+ size_t gap = b->text->gap_size + b->text->end_gap_size;
+ size_t malloc_use = malloced_storage_size (b->text->beg, was_requested + gap, 0);
+
+ ovstats->gap_overhead += gap;
+ ovstats->was_requested += was_requested;
+ ovstats->malloc_overhead += malloc_use - (was_requested + gap);
+ return malloc_use;
+}
+
+static void
+compute_buffer_usage (struct buffer *b, struct buffer_stats *stats,
+ struct overhead_stats *ovstats)
+{
+ xzero (*stats);
+ stats->other += malloced_storage_size (b, sizeof (*b), ovstats);
+ stats->text += compute_buffer_text_usage (b, ovstats);
+ stats->markers += compute_buffer_marker_usage (b, ovstats);
+ stats->extents += compute_buffer_extent_usage (b, ovstats);
+}
+
+DEFUN ("buffer-memory-usage", Fbuffer_memory_usage, 1, 1, 0, /*
+Return stats about the memory usage of buffer BUFFER.
+The values returned are in the form of an alist of usage types and byte
+counts. The byte counts attempt to encompass all the memory used
+by the buffer (separate from the memory logically associated with a
+buffer or frame), including internal structures and any malloc()
+overhead associated with them. In practice, the byte counts are
+underestimated because certain memory usage is very hard to determine
+\(e.g. the amount of memory used inside the Xt library or inside the
+X server) and because there is other stuff that might logically
+be associated with a window, buffer, or frame (e.g. window configurations,
+glyphs) but should not obviously be included in the usage counts.
+
+Multiple slices of the total memory usage may be returned, separated
+by a nil. Each slice represents a particular view of the memory, a
+particular way of partitioning it into groups. Within a slice, there
+is no overlap between the groups of memory, and each slice collectively
+represents all the memory concerned.
+*/
+ (buffer))
+{
+ struct buffer_stats stats;
+ struct overhead_stats ovstats;
+ Lisp_Object val = Qnil;
+
+ CHECK_BUFFER (buffer); /* dead buffers should be allowed, no? */
+ xzero (ovstats);
+ compute_buffer_usage (XBUFFER (buffer), &stats, &ovstats);
+
+ val = acons (Qtext, make_int (stats.text), val);
+ val = acons (Qmarkers, make_int (stats.markers), val);
+ val = acons (Qextents, make_int (stats.extents), val);
+ val = acons (Qother, make_int (stats.other), val);
+ val = Fcons (Qnil, val);
+ val = acons (Qactually_requested, make_int (ovstats.was_requested), val);
+ val = acons (Qmalloc_overhead, make_int (ovstats.malloc_overhead), val);
+ val = acons (Qgap_overhead, make_int (ovstats.gap_overhead), val);
+ val = acons (Qdynarr_overhead, make_int (ovstats.dynarr_overhead), val);
+
+ return Fnreverse (val);
+}
+
+#endif /* MEMORY_USAGE_STATS */
+
+\f
+/************************************************************************/
+/* Implement TO_EXTERNAL_FORMAT, TO_INTERNAL_FORMAT */
+/************************************************************************/
+
+/* This implementation should probably be elsewhere, but it can't be
+ in file-coding.c since that file is only available if FILE_CODING
+ is defined. */
+#ifdef FILE_CODING
+static int
+coding_system_is_binary (Lisp_Object coding_system)
+{
+ Lisp_Coding_System *cs = XCODING_SYSTEM (coding_system);
+ return
+ (CODING_SYSTEM_TYPE (cs) == CODESYS_NO_CONVERSION &&
+ CODING_SYSTEM_EOL_TYPE (cs) == EOL_LF &&
+ EQ (CODING_SYSTEM_POST_READ_CONVERSION (cs), Qnil) &&
+ EQ (CODING_SYSTEM_PRE_WRITE_CONVERSION (cs), Qnil));
+}
+#else
+#define coding_system_is_binary(coding_system) 1
+#endif
+
+typedef struct
+{
+ Dynarr_declare (Bufbyte_dynarr *);
+} Bufbyte_dynarr_dynarr;
+
+typedef struct
+{
+ Dynarr_declare (Extbyte_dynarr *);
+} Extbyte_dynarr_dynarr;
+
+static Extbyte_dynarr_dynarr *conversion_out_dynarr_list;
+static Bufbyte_dynarr_dynarr *conversion_in_dynarr_list;
+
+static int dfc_convert_to_external_format_in_use;
+static int dfc_convert_to_internal_format_in_use;
+
+static Lisp_Object
+dfc_convert_to_external_format_reset_in_use (Lisp_Object value)
+{
+ dfc_convert_to_external_format_in_use = XINT (value);
+ return Qnil;
+}
+
+static Lisp_Object
+dfc_convert_to_internal_format_reset_in_use (Lisp_Object value)
+{
+ dfc_convert_to_internal_format_in_use = XINT (value);
+ return Qnil;
+}
+
+void
+dfc_convert_to_external_format (dfc_conversion_type source_type,
+ dfc_conversion_data *source,
+#ifdef FILE_CODING
+ Lisp_Object coding_system,
+#endif
+ dfc_conversion_type sink_type,
+ dfc_conversion_data *sink)
+{
+ int count = specpdl_depth ();
+ Extbyte_dynarr *conversion_out_dynarr;
+
+ type_checking_assert
+ (((source_type == DFC_TYPE_DATA) ||
+ (source_type == DFC_TYPE_LISP_LSTREAM && LSTREAMP (source->lisp_object)) ||
+ (source_type == DFC_TYPE_LISP_STRING && STRINGP (source->lisp_object)))
+ &&
+ ((sink_type == DFC_TYPE_DATA) ||
+ (sink_type == DFC_TYPE_LISP_LSTREAM && LSTREAMP (source->lisp_object))));
+
+ record_unwind_protect (dfc_convert_to_external_format_reset_in_use,
+ make_int (dfc_convert_to_external_format_in_use));
+ if (Dynarr_length (conversion_out_dynarr_list) <=
+ dfc_convert_to_external_format_in_use)
+ Dynarr_add (conversion_out_dynarr_list, Dynarr_new (Extbyte));
+ conversion_out_dynarr = Dynarr_at (conversion_out_dynarr_list,
+ dfc_convert_to_external_format_in_use);
+ dfc_convert_to_external_format_in_use++;
+ Dynarr_reset (conversion_out_dynarr);
+
+#ifdef FILE_CODING
+ coding_system = Fget_coding_system (coding_system);
+#endif
+
+ /* Here we optimize in the case where the coding system does no
+ conversion. However, we don't want to optimize in case the source
+ or sink is an lstream, since writing to an lstream can cause a
+ garbage collection, and this could be problematic if the source
+ is a lisp string. */
+ if (source_type != DFC_TYPE_LISP_LSTREAM &&
+ sink_type != DFC_TYPE_LISP_LSTREAM &&
+ coding_system_is_binary (coding_system))
+ {
+ const Bufbyte *ptr;
+ Bytecount len;
+
+ if (source_type == DFC_TYPE_LISP_STRING)
+ {
+ ptr = XSTRING_DATA (source->lisp_object);
+ len = XSTRING_LENGTH (source->lisp_object);
+ }
+ else
+ {
+ ptr = (Bufbyte *) source->data.ptr;
+ len = source->data.len;
+ }
+
+#ifdef MULE
+ {
+ const Bufbyte *end;
+ for (end = ptr + len; ptr < end;)
+ {
+ Bufbyte c =
+ (BYTE_ASCII_P (*ptr)) ? *ptr :
+ (*ptr == LEADING_BYTE_CONTROL_1) ? (*(ptr+1) - 0x20) :
+ (*ptr == LEADING_BYTE_LATIN_ISO8859_1) ? (*(ptr+1)) :
+ '~';
+
+ Dynarr_add (conversion_out_dynarr, (Extbyte) c);
+ INC_CHARPTR (ptr);
+ }
+ bufpos_checking_assert (ptr == end);
+ }
+#else
+ Dynarr_add_many (conversion_out_dynarr, ptr, len);
+#endif
+
+ }
+ else
+ {
+ Lisp_Object streams_to_delete[3];
+ int delete_count = 0;
+ Lisp_Object instream, outstream;
+ Lstream *reader, *writer;
+ struct gcpro gcpro1, gcpro2;
+
+ if (source_type == DFC_TYPE_LISP_LSTREAM)
+ instream = source->lisp_object;
+ else if (source_type == DFC_TYPE_DATA)
+ streams_to_delete[delete_count++] = instream =
+ make_fixed_buffer_input_stream (source->data.ptr, source->data.len);
+ else
+ {
+ type_checking_assert (source_type == DFC_TYPE_LISP_STRING);
+ streams_to_delete[delete_count++] = instream =
+ make_lisp_string_input_stream (source->lisp_object, 0, -1);
+ }
+
+ if (sink_type == DFC_TYPE_LISP_LSTREAM)
+ outstream = sink->lisp_object;
+ else
+ {
+ type_checking_assert (sink_type == DFC_TYPE_DATA);
+ streams_to_delete[delete_count++] = outstream =
+ make_dynarr_output_stream
+ ((unsigned_char_dynarr *) conversion_out_dynarr);
+ }
+
+#ifdef FILE_CODING
+ streams_to_delete[delete_count++] = outstream =
+ make_encoding_output_stream (XLSTREAM (outstream), coding_system);
+#endif
+
+ reader = XLSTREAM (instream);
+ writer = XLSTREAM (outstream);
+ /* decoding_stream will gc-protect outstream */
+ GCPRO2 (instream, outstream);
+
+ while (1)
+ {
+ Lstream_data_count size_in_bytes;
+ char tempbuf[1024]; /* some random amount */
+
+ size_in_bytes = Lstream_read (reader, tempbuf, sizeof (tempbuf));
+
+ if (size_in_bytes == 0)
+ break;
+ else if (size_in_bytes < 0)
+ error ("Error converting to external format");
+
+ size_in_bytes = Lstream_write (writer, tempbuf, size_in_bytes);
+
+ if (size_in_bytes <= 0)
+ error ("Error converting to external format");
+ }
+
+ /* Closing writer will close any stream at the other end of writer. */
+ Lstream_close (writer);
+ Lstream_close (reader);
+ UNGCPRO;
+
+ /* The idea is that this function will create no garbage. */
+ while (delete_count)
+ Lstream_delete (XLSTREAM (streams_to_delete [--delete_count]));
+ }
+
+ unbind_to (count, Qnil);
+
+ if (sink_type != DFC_TYPE_LISP_LSTREAM)
+ {
+ sink->data.len = Dynarr_length (conversion_out_dynarr);
+ Dynarr_add (conversion_out_dynarr, '\0'); /* NUL-terminate! */
+ sink->data.ptr = Dynarr_atp (conversion_out_dynarr, 0);
+ }
+}
+
+void
+dfc_convert_to_internal_format (dfc_conversion_type source_type,
+ dfc_conversion_data *source,
+#ifdef FILE_CODING
+ Lisp_Object coding_system,
+#endif
+ dfc_conversion_type sink_type,
+ dfc_conversion_data *sink)
+{
+ int count = specpdl_depth ();
+ Bufbyte_dynarr *conversion_in_dynarr;
+
+ type_checking_assert
+ ((source_type == DFC_TYPE_DATA ||
+ source_type == DFC_TYPE_LISP_LSTREAM)
+ &&
+ (sink_type == DFC_TYPE_DATA ||
+ sink_type == DFC_TYPE_LISP_LSTREAM));
+
+ record_unwind_protect (dfc_convert_to_internal_format_reset_in_use,
+ make_int (dfc_convert_to_internal_format_in_use));
+ if (Dynarr_length (conversion_in_dynarr_list) <=
+ dfc_convert_to_internal_format_in_use)
+ Dynarr_add (conversion_in_dynarr_list, Dynarr_new (Bufbyte));
+ conversion_in_dynarr = Dynarr_at (conversion_in_dynarr_list,
+ dfc_convert_to_internal_format_in_use);
+ dfc_convert_to_internal_format_in_use++;
+ Dynarr_reset (conversion_in_dynarr);
+
+#ifdef FILE_CODING
+ coding_system = Fget_coding_system (coding_system);
+#endif
+
+ if (source_type != DFC_TYPE_LISP_LSTREAM &&
+ sink_type != DFC_TYPE_LISP_LSTREAM &&
+ coding_system_is_binary (coding_system))
+ {
+#ifdef MULE
+ const Bufbyte *ptr = (const Bufbyte *) source->data.ptr;
+ Bytecount len = source->data.len;
+ const Bufbyte *end = ptr + len;
+
+ for (; ptr < end; ptr++)
+ {
+ Bufbyte c = *ptr;
+
+ if (BYTE_ASCII_P (c))
+ Dynarr_add (conversion_in_dynarr, c);
+ else if (BYTE_C1_P (c))
+ {
+ Dynarr_add (conversion_in_dynarr, LEADING_BYTE_CONTROL_1);
+ Dynarr_add (conversion_in_dynarr, c + 0x20);
+ }
+ else
+ {
+ Dynarr_add (conversion_in_dynarr, LEADING_BYTE_LATIN_ISO8859_1);
+ Dynarr_add (conversion_in_dynarr, c);
+ }
+ }
+#else
+ Dynarr_add_many (conversion_in_dynarr, source->data.ptr, source->data.len);
+#endif
+ }
+ else
+ {
+ Lisp_Object streams_to_delete[3];
+ int delete_count = 0;
+ Lisp_Object instream, outstream;
+ Lstream *reader, *writer;
+ struct gcpro gcpro1, gcpro2;
+
+ if (source_type == DFC_TYPE_LISP_LSTREAM)
+ instream = source->lisp_object;
+ else
+ {
+ type_checking_assert (source_type == DFC_TYPE_DATA);
+ streams_to_delete[delete_count++] = instream =
+ make_fixed_buffer_input_stream (source->data.ptr, source->data.len);
+ }
+
+ if (sink_type == DFC_TYPE_LISP_LSTREAM)
+ outstream = sink->lisp_object;
+ else
+ {
+ type_checking_assert (sink_type == DFC_TYPE_DATA);
+ streams_to_delete[delete_count++] = outstream =
+ make_dynarr_output_stream
+ ((unsigned_char_dynarr *) conversion_in_dynarr);
+ }
+
+#ifdef FILE_CODING
+ streams_to_delete[delete_count++] = outstream =
+ make_decoding_output_stream (XLSTREAM (outstream), coding_system);
+#endif
+
+ reader = XLSTREAM (instream);
+ writer = XLSTREAM (outstream);
+ /* outstream will gc-protect its sink stream, if necessary */
+ GCPRO2 (instream, outstream);
+
+ while (1)
+ {
+ Lstream_data_count size_in_bytes;
+ char tempbuf[1024]; /* some random amount */
+
+ size_in_bytes = Lstream_read (reader, tempbuf, sizeof (tempbuf));
+
+ if (size_in_bytes == 0)
+ break;
+ else if (size_in_bytes < 0)
+ error ("Error converting to internal format");
+
+ size_in_bytes = Lstream_write (writer, tempbuf, size_in_bytes);
+
+ if (size_in_bytes <= 0)
+ error ("Error converting to internal format");
+ }
+
+ /* Closing writer will close any stream at the other end of writer. */
+ Lstream_close (writer);
+ Lstream_close (reader);
+ UNGCPRO;
+
+ /* The idea is that this function will create no garbage. */
+ while (delete_count)
+ Lstream_delete (XLSTREAM (streams_to_delete [--delete_count]));
+ }
+
+ unbind_to (count, Qnil);
+
+ if (sink_type != DFC_TYPE_LISP_LSTREAM)
+ {
+ sink->data.len = Dynarr_length (conversion_in_dynarr);
+ Dynarr_add (conversion_in_dynarr, '\0'); /* NUL-terminate! */
+ sink->data.ptr = Dynarr_atp (conversion_in_dynarr, 0);
+ }
+}
+\f
+
+void
+syms_of_buffer (void)
+{
+ INIT_LRECORD_IMPLEMENTATION (buffer);
+
+ defsymbol (&Qbuffer_live_p, "buffer-live-p");
+ defsymbol (&Qbuffer_or_string_p, "buffer-or-string-p");
+ defsymbol (&Qmode_class, "mode-class");
+ defsymbol (&Qrename_auto_save_file, "rename-auto-save-file");
+ defsymbol (&Qkill_buffer_hook, "kill-buffer-hook");
+ defsymbol (&Qpermanent_local, "permanent-local");
+
+ defsymbol (&Qfirst_change_hook, "first-change-hook");
+ defsymbol (&Qbefore_change_functions, "before-change-functions");
+ defsymbol (&Qafter_change_functions, "after-change-functions");
+
+ /* #### Obsolete, for compatibility */
+ defsymbol (&Qbefore_change_function, "before-change-function");
+ defsymbol (&Qafter_change_function, "after-change-function");
+
+ defsymbol (&Qdefault_directory, "default-directory");
+
+ defsymbol (&Qget_file_buffer, "get-file-buffer");
+ defsymbol (&Qchange_major_mode_hook, "change-major-mode-hook");
+
+ defsymbol (&Qfundamental_mode, "fundamental-mode");
+
+ defsymbol (&Qfind_file_compare_truenames, "find-file-compare-truenames");
+
+ defsymbol (&Qswitch_to_buffer, "switch-to-buffer");
+
+ DEFSUBR (Fbufferp);
+ DEFSUBR (Fbuffer_live_p);
+ DEFSUBR (Fbuffer_list);
+ DEFSUBR (Fdecode_buffer);
+ DEFSUBR (Fget_buffer);
+ DEFSUBR (Fget_file_buffer);
+ DEFSUBR (Fget_buffer_create);
+ DEFSUBR (Fmake_indirect_buffer);
+
+ DEFSUBR (Fgenerate_new_buffer_name);
+ DEFSUBR (Fbuffer_name);
+ DEFSUBR (Fbuffer_file_name);
+ DEFSUBR (Fbuffer_base_buffer);
+ DEFSUBR (Fbuffer_indirect_children);
+ DEFSUBR (Fbuffer_local_variables);
+ DEFSUBR (Fbuffer_modified_p);
+ DEFSUBR (Fset_buffer_modified_p);
+ DEFSUBR (Fbuffer_modified_tick);
+ DEFSUBR (Frename_buffer);
+ DEFSUBR (Fother_buffer);
+ DEFSUBR (Fbuffer_disable_undo);
+ DEFSUBR (Fbuffer_enable_undo);
+ DEFSUBR (Fkill_buffer);
+ DEFSUBR (Ferase_buffer);
+ DEFSUBR (Frecord_buffer);
+ DEFSUBR (Fset_buffer_major_mode);
+ DEFSUBR (Fcurrent_buffer);
+ DEFSUBR (Fset_buffer);
+ DEFSUBR (Fbarf_if_buffer_read_only);
+ DEFSUBR (Fbury_buffer);
+ DEFSUBR (Fkill_all_local_variables);
+#ifdef MEMORY_USAGE_STATS
+ DEFSUBR (Fbuffer_memory_usage);
+#endif
+
+ DEFERROR (Qprotected_field, "Attempt to modify a protected field",
+ Qinvalid_change);
+}
+
+void
+reinit_vars_of_buffer (void)
+{
+ conversion_in_dynarr_list = Dynarr_new2 (Bufbyte_dynarr_dynarr,
+ Bufbyte_dynarr *);
+ conversion_out_dynarr_list = Dynarr_new2 (Extbyte_dynarr_dynarr,
+ Extbyte_dynarr *);
+
+ staticpro_nodump (&Vbuffer_alist);
+ Vbuffer_alist = Qnil;
+ current_buffer = 0;
+}
+
+/* initialize the buffer routines */
+void
+vars_of_buffer (void)
+{
+ /* This function can GC */
+ reinit_vars_of_buffer ();
+
+ staticpro (&QSFundamental);
+ staticpro (&QSscratch);
+
+ QSFundamental = build_string ("Fundamental");
+ QSscratch = build_string (DEFER_GETTEXT ("*scratch*"));
+
+ DEFVAR_LISP ("change-major-mode-hook", &Vchange_major_mode_hook /*
+List of hooks to be run before killing local variables in a buffer.
+This should be used by any mode that temporarily alters the contents or
+the read-only state of the buffer. See also `kill-all-local-variables'.
+*/ );
+ Vchange_major_mode_hook = Qnil;
+
+ DEFVAR_BOOL ("find-file-compare-truenames", &find_file_compare_truenames /*
+If this is true, then the `find-file' command will check the truenames
+of all visited files when deciding whether a given file is already in
+a buffer, instead of just `buffer-file-name'. This means that if you
+attempt to visit another file which is a symbolic link to a file which
+is already in a buffer, the existing buffer will be found instead of a
+newly-created one. This works if any component of the pathname
+(including a non-terminal component) is a symbolic link as well, but
+doesn't work with hard links (nothing does).
+
+See also the variable `find-file-use-truenames'.
+*/ );
+#if defined(CYGWIN) || defined(WIN32_NATIVE)
+ find_file_compare_truenames = 1;
+#else
+ find_file_compare_truenames = 0;
+#endif
+
+ DEFVAR_BOOL ("find-file-use-truenames", &find_file_use_truenames /*
+If this is true, then a buffer's visited file-name will always be
+chased back to the real file; it will never be a symbolic link, and there
+will never be a symbolic link anywhere in its directory path.
+That is, the buffer-file-name and buffer-file-truename will be equal.
+This doesn't work with hard links.
+
+See also the variable `find-file-compare-truenames'.
+*/ );
+ find_file_use_truenames = 0;
+
+ DEFVAR_LISP ("before-change-functions", &Vbefore_change_functions /*
+List of functions to call before each text change.
+Two arguments are passed to each function: the positions of
+the beginning and end of the range of old text to be changed.
+\(For an insertion, the beginning and end are at the same place.)
+No information is given about the length of the text after the change.
+
+Buffer changes made while executing the `before-change-functions'
+don't call any before-change or after-change functions.
+*/ );
+ Vbefore_change_functions = Qnil;
+
+ /* FSF Emacs has the following additional doc at the end of
+ before-change-functions and after-change-functions:
+
+That's because these variables are temporarily set to nil.
+As a result, a hook function cannot straightforwardly alter the value of
+these variables. See the Emacs Lisp manual for a way of
+accomplishing an equivalent result by using other variables.
+
+ But this doesn't apply under XEmacs because things are
+ handled better. */
+
+ DEFVAR_LISP ("after-change-functions", &Vafter_change_functions /*
+List of functions to call after each text change.
+Three arguments are passed to each function: the positions of
+the beginning and end of the range of changed text,
+and the length of the pre-change text replaced by that range.
+\(For an insertion, the pre-change length is zero;
+for a deletion, that length is the number of characters deleted,
+and the post-change beginning and end are at the same place.)
+
+Buffer changes made while executing `after-change-functions'
+don't call any before-change or after-change functions.
+*/ );
+ Vafter_change_functions = Qnil;
+
+ DEFVAR_LISP ("before-change-function", &Vbefore_change_function /*
+
+*/ ); /* obsoleteness will be documented */
+ Vbefore_change_function = Qnil;
+
+ DEFVAR_LISP ("after-change-function", &Vafter_change_function /*
+
+*/ ); /* obsoleteness will be documented */
+ Vafter_change_function = Qnil;
+
+ DEFVAR_LISP ("first-change-hook", &Vfirst_change_hook /*
+A list of functions to call before changing a buffer which is unmodified.
+The functions are run using the `run-hooks' function.
+*/ );
+ Vfirst_change_hook = Qnil;
+
+#if 0 /* FSFmacs */
+ xxDEFVAR_LISP ("transient-mark-mode", &Vtransient_mark_mode /*
+*Non-nil means deactivate the mark when the buffer contents change.
+*/ );
+ Vtransient_mark_mode = Qnil;
+#endif /* FSFmacs */
+
+ DEFVAR_INT ("undo-threshold", &undo_threshold /*
+Keep no more undo information once it exceeds this size.
+This threshold is applied when garbage collection happens.
+The size is counted as the number of bytes occupied,
+which includes both saved text and other data.
+*/ );
+ undo_threshold = 20000;
+
+ DEFVAR_INT ("undo-high-threshold", &undo_high_threshold /*
+Don't keep more than this much size of undo information.
+A command which pushes past this size is itself forgotten.
+This threshold is applied when garbage collection happens.
+The size is counted as the number of bytes occupied,
+which includes both saved text and other data.
+*/ );
+ undo_high_threshold = 30000;
+
+ DEFVAR_LISP ("inhibit-read-only", &Vinhibit_read_only /*
+*Non-nil means disregard read-only status of buffers or characters.
+If the value is t, disregard `buffer-read-only' and all `read-only'
+text properties. If the value is a list, disregard `buffer-read-only'
+and disregard a `read-only' extent property or text property if the
+property value is a member of the list.
+*/ );
+ Vinhibit_read_only = Qnil;
+
+ DEFVAR_LISP ("kill-buffer-query-functions", &Vkill_buffer_query_functions /*
+List of functions called with no args to query before killing a buffer.
+*/ );
+ Vkill_buffer_query_functions = Qnil;
+
+ DEFVAR_BOOL ("delete-auto-save-files", &delete_auto_save_files /*
+*Non-nil means delete auto-save file when a buffer is saved or killed.
+*/ );
+ delete_auto_save_files = 1;
+}
+
+/* The docstrings for DEFVAR_* are recorded externally by make-docfile. */
+
+/* Renamed from DEFVAR_PER_BUFFER because FSFmacs D_P_B takes
+ a bogus extra arg, which confuses an otherwise identical make-docfile.c */
+#define DEFVAR_BUFFER_LOCAL_1(lname, field_name, forward_type, magicfun) do { \
+ static const struct symbol_value_forward I_hate_C = \
+ { /* struct symbol_value_forward */ \
+ { /* struct symbol_value_magic */ \
+ { /* struct lcrecord_header */ \
+ { /* struct lrecord_header */ \
+ lrecord_type_symbol_value_forward, /* lrecord_type_index */ \
+ 1, /* mark bit */ \
+ 1, /* c_readonly bit */ \
+ 1 /* lisp_readonly bit */ \
+ }, \
+ 0, /* next */ \
+ 0, /* uid */ \
+ 0 /* free */ \
+ }, \
+ &(buffer_local_flags.field_name), \
+ forward_type \
+ }, \
+ magicfun \
+ }; \
+ \
+ { \
+ int offset = ((char *)symbol_value_forward_forward (&I_hate_C) - \
+ (char *)&buffer_local_flags); \
+ defvar_magic (lname, &I_hate_C); \
+ \
+ *((Lisp_Object *)(offset + (char *)XBUFFER (Vbuffer_local_symbols))) \
+ = intern (lname); \
+ } \
+} while (0)
+
+#define DEFVAR_BUFFER_LOCAL_MAGIC(lname, field_name, magicfun) \
+ DEFVAR_BUFFER_LOCAL_1 (lname, field_name, \
+ SYMVAL_CURRENT_BUFFER_FORWARD, magicfun)
+#define DEFVAR_BUFFER_LOCAL(lname, field_name) \
+ DEFVAR_BUFFER_LOCAL_MAGIC (lname, field_name, 0)
+#define DEFVAR_CONST_BUFFER_LOCAL_MAGIC(lname, field_name, magicfun) \
+ DEFVAR_BUFFER_LOCAL_1 (lname, field_name, \
+ SYMVAL_CONST_CURRENT_BUFFER_FORWARD, magicfun)
+#define DEFVAR_CONST_BUFFER_LOCAL(lname, field_name) \
+ DEFVAR_CONST_BUFFER_LOCAL_MAGIC (lname, field_name, 0)
+
+#define DEFVAR_BUFFER_DEFAULTS_MAGIC(lname, field_name, magicfun) \
+ DEFVAR_SYMVAL_FWD (lname, &(buffer_local_flags.field_name), \
+ SYMVAL_DEFAULT_BUFFER_FORWARD, magicfun)
+#define DEFVAR_BUFFER_DEFAULTS(lname, field_name) \
+ DEFVAR_BUFFER_DEFAULTS_MAGIC (lname, field_name, 0)
+
+static void
+nuke_all_buffer_slots (struct buffer *b, Lisp_Object zap)
+{
+ zero_lcrecord (b);
+
+ b->extent_info = Qnil;
+ b->indirect_children = Qnil;
+ b->own_text.line_number_cache = Qnil;
+
+#define MARKED_SLOT(x) b->x = zap
+#include "bufslots.h"
+#undef MARKED_SLOT
+}
+
+static void
+common_init_complex_vars_of_buffer (void)
+{
+ /* Make sure all markable slots in buffer_defaults
+ are initialized reasonably, so mark_buffer won't choke. */
+ struct buffer *defs = alloc_lcrecord_type (struct buffer, &lrecord_buffer);
+ struct buffer *syms = alloc_lcrecord_type (struct buffer, &lrecord_buffer);
+
+ staticpro_nodump (&Vbuffer_defaults);
+ staticpro_nodump (&Vbuffer_local_symbols);
+ XSETBUFFER (Vbuffer_defaults, defs);
+ XSETBUFFER (Vbuffer_local_symbols, syms);
+
+ nuke_all_buffer_slots (syms, Qnil);
+ nuke_all_buffer_slots (defs, Qnil);
+ defs->text = &defs->own_text;
+ syms->text = &syms->own_text;
+
+ /* Set up the non-nil default values of various buffer slots.
+ Must do these before making the first buffer. */
+ defs->major_mode = Qfundamental_mode;
+ defs->mode_name = QSFundamental;
+ defs->abbrev_table = Qnil; /* real default setup by Lisp code */
+
+ defs->case_table = Vstandard_case_table;
+#ifdef MULE
+ defs->category_table = Vstandard_category_table;
+#endif /* MULE */
+ defs->syntax_table = Vstandard_syntax_table;
+ defs->mirror_syntax_table =
+ XCHAR_TABLE (Vstandard_syntax_table)->mirror_table;
+ defs->modeline_format = build_string ("%-"); /* reset in loaddefs.el */
+ defs->case_fold_search = Qt;
+ defs->selective_display_ellipses = Qt;
+ defs->tab_width = make_int (8);
+ defs->ctl_arrow = Qt;
+ defs->fill_column = make_int (70);
+ defs->left_margin = Qzero;
+ defs->saved_size = Qzero; /* lisp code wants int-or-nil */
+ defs->modtime = 0;
+ defs->auto_save_modified = 0;
+ defs->auto_save_failure_time = -1;
+ defs->invisibility_spec = Qt;
+ defs->buffer_local_face_property = 0;
+
+ defs->indirect_children = Qnil;
+ syms->indirect_children = Qnil;
+
+ {
+ /* 0 means var is always local. Default used only at creation.
+ * -1 means var is always local. Default used only at reset and
+ * creation.
+ * -2 means there's no lisp variable corresponding to this slot
+ * and the default is only used at creation.
+ * -3 means no Lisp variable. Default used only at reset and creation.
+ * >0 is mask. Var is local if ((buffer->local_var_flags & mask) != 0)
+ * Otherwise default is used.
+ */
+ Lisp_Object always_local_no_default = make_int (0);
+ Lisp_Object always_local_resettable = make_int (-1);
+ Lisp_Object resettable = make_int (-3);
+
+ /* Assign the local-flags to the slots that have default values.
+ The local flag is a bit that is used in the buffer
+ to say that it has its own local value for the slot.
+ The local flag bits are in the local_var_flags slot of the
+ buffer. */
+
+ nuke_all_buffer_slots (&buffer_local_flags, make_int (-2));
+ buffer_local_flags.filename = always_local_no_default;
+ buffer_local_flags.directory = always_local_no_default;
+ buffer_local_flags.backed_up = always_local_no_default;
+ buffer_local_flags.saved_size = always_local_no_default;
+ buffer_local_flags.auto_save_file_name = always_local_no_default;
+ buffer_local_flags.read_only = always_local_no_default;
+
+ buffer_local_flags.major_mode = always_local_resettable;
+ buffer_local_flags.mode_name = always_local_resettable;
+ buffer_local_flags.undo_list = always_local_no_default;
+#if 0 /* FSFmacs */
+ buffer_local_flags.mark_active = always_local_resettable;
+#endif
+ buffer_local_flags.point_before_scroll = always_local_resettable;
+ buffer_local_flags.file_truename = always_local_no_default;
+ buffer_local_flags.invisibility_spec = always_local_resettable;
+ buffer_local_flags.file_format = always_local_resettable;
+ buffer_local_flags.generated_modeline_string = always_local_no_default;
+
+ buffer_local_flags.keymap = resettable;
+ buffer_local_flags.case_table = resettable;
+ buffer_local_flags.syntax_table = resettable;
+#ifdef MULE
+ buffer_local_flags.category_table = resettable;
+#endif
+
+ buffer_local_flags.modeline_format = make_int (1<<0);
+ buffer_local_flags.abbrev_mode = make_int (1<<1);
+ buffer_local_flags.overwrite_mode = make_int (1<<2);
+ buffer_local_flags.case_fold_search = make_int (1<<3);
+ buffer_local_flags.auto_fill_function = make_int (1<<4);
+ buffer_local_flags.selective_display = make_int (1<<5);
+ buffer_local_flags.selective_display_ellipses = make_int (1<<6);
+ buffer_local_flags.tab_width = make_int (1<<7);
+ buffer_local_flags.truncate_lines = make_int (1<<8);
+ buffer_local_flags.ctl_arrow = make_int (1<<9);
+ buffer_local_flags.fill_column = make_int (1<<10);
+ buffer_local_flags.left_margin = make_int (1<<11);
+ buffer_local_flags.abbrev_table = make_int (1<<12);
+#ifdef REGION_CACHE_NEEDS_WORK
+ buffer_local_flags.cache_long_line_scans = make_int (1<<13);
+#endif
+#ifdef FILE_CODING
+ buffer_local_flags.buffer_file_coding_system = make_int (1<<14);
+#endif
+
+ /* #### Warning: 1<<31 is the largest number currently allowable
+ due to the XINT() handling of this value. With some
+ rearrangement you can get 3 more bits.
+
+ #### 3 more? 34 bits???? -ben */
+ }
+}
+
+#define BUFFER_SLOTS_SIZE (offsetof (struct buffer, BUFFER_SLOTS_LAST_NAME) - offsetof (struct buffer, BUFFER_SLOTS_FIRST_NAME) + sizeof (Lisp_Object))
+#define BUFFER_SLOTS_COUNT (BUFFER_SLOTS_SIZE / sizeof (Lisp_Object))
+
+void
+reinit_complex_vars_of_buffer (void)
+{
+ struct buffer *defs, *syms;
+
+ common_init_complex_vars_of_buffer ();
+
+ defs = XBUFFER (Vbuffer_defaults);
+ syms = XBUFFER (Vbuffer_local_symbols);
+ memcpy (&defs->BUFFER_SLOTS_FIRST_NAME,
+ buffer_defaults_saved_slots,
+ BUFFER_SLOTS_SIZE);
+ memcpy (&syms->BUFFER_SLOTS_FIRST_NAME,
+ buffer_local_symbols_saved_slots,
+ BUFFER_SLOTS_SIZE);
+}
+
+
+static const struct lrecord_description buffer_slots_description_1[] = {
+ { XD_LISP_OBJECT_ARRAY, 0, BUFFER_SLOTS_COUNT },
+ { XD_END }
+};
+
+static const struct struct_description buffer_slots_description = {
+ BUFFER_SLOTS_SIZE,
+ buffer_slots_description_1
+};
+
+void
+complex_vars_of_buffer (void)
+{
+ struct buffer *defs, *syms;
+
+ common_init_complex_vars_of_buffer ();
+
+ defs = XBUFFER (Vbuffer_defaults);
+ syms = XBUFFER (Vbuffer_local_symbols);
+ buffer_defaults_saved_slots = &defs->BUFFER_SLOTS_FIRST_NAME;
+ buffer_local_symbols_saved_slots = &syms->BUFFER_SLOTS_FIRST_NAME;
+ dump_add_root_struct_ptr (&buffer_defaults_saved_slots, &buffer_slots_description);
+ dump_add_root_struct_ptr (&buffer_local_symbols_saved_slots, &buffer_slots_description);
+
+ DEFVAR_BUFFER_DEFAULTS ("default-modeline-format", modeline_format /*
+Default value of `modeline-format' for buffers that don't override it.
+This is the same as (default-value 'modeline-format).
+*/ );
+
+ DEFVAR_BUFFER_DEFAULTS ("default-abbrev-mode", abbrev_mode /*
+Default value of `abbrev-mode' for buffers that do not override it.
+This is the same as (default-value 'abbrev-mode).
+*/ );
+
+ DEFVAR_BUFFER_DEFAULTS ("default-ctl-arrow", ctl_arrow /*
+Default value of `ctl-arrow' for buffers that do not override it.
+This is the same as (default-value 'ctl-arrow).
+*/ );
+
+#if 0 /* #### make this a specifier! */
+ DEFVAR_BUFFER_DEFAULTS ("default-display-direction", display_direction /*
+Default display-direction for buffers that do not override it.
+This is the same as (default-value 'display-direction).
+Note: This is not yet implemented.
+*/ );
+#endif
+
+ DEFVAR_BUFFER_DEFAULTS ("default-truncate-lines", truncate_lines /*
+Default value of `truncate-lines' for buffers that do not override it.
+This is the same as (default-value 'truncate-lines).
+*/ );
+
+ DEFVAR_BUFFER_DEFAULTS ("default-fill-column", fill_column /*
+Default value of `fill-column' for buffers that do not override it.
+This is the same as (default-value 'fill-column).
+*/ );
+
+ DEFVAR_BUFFER_DEFAULTS ("default-left-margin", left_margin /*
+Default value of `left-margin' for buffers that do not override it.
+This is the same as (default-value 'left-margin).
+*/ );
+
+ DEFVAR_BUFFER_DEFAULTS ("default-tab-width", tab_width /*
+Default value of `tab-width' for buffers that do not override it.
+This is the same as (default-value 'tab-width).
+*/ );
+
+ DEFVAR_BUFFER_DEFAULTS ("default-case-fold-search", case_fold_search /*
+Default value of `case-fold-search' for buffers that don't override it.
+This is the same as (default-value 'case-fold-search).
+*/ );
+
+ DEFVAR_BUFFER_LOCAL ("modeline-format", modeline_format /*
+Template for displaying modeline for current buffer.
+Each buffer has its own value of this variable.
+Value may be a string, symbol, glyph, generic specifier, list or cons cell.
+For a symbol, its value is processed (but it is ignored if t or nil).
+ A string appearing directly as the value of a symbol is processed verbatim
+ in that the %-constructs below are not recognized.
+For a glyph, it is inserted as is.
+For a generic specifier (i.e. a specifier of type `generic'), its instance
+ is computed in the current window using the equivalent of `specifier-instance'
+ and the value is processed.
+For a list whose car is a symbol, the symbol's value is taken,
+ and if that is non-nil, the cadr of the list is processed recursively.
+ Otherwise, the caddr of the list (if there is one) is processed.
+For a list whose car is a string or list, each element is processed
+ recursively and the results are effectively concatenated.
+For a list whose car is an integer, the cdr of the list is processed
+ and padded (if the number is positive) or truncated (if negative)
+ to the width specified by that number.
+For a list whose car is an extent, the cdr of the list is processed
+ normally but the results are displayed using the face of the
+ extent, and mouse clicks over this section are processed using the
+ keymap of the extent. (In addition, if the extent has a help-echo
+ property, that string will be echoed when the mouse moves over this
+ section.) If extents are nested, all keymaps are properly consulted
+ when processing mouse clicks, but multiple faces are not correctly
+ merged (only the first face is used), and lists of faces are not
+ correctly handled. See `generated-modeline-string' for more information.
+A string is printed verbatim in the modeline except for %-constructs:
+ (%-constructs are processed when the string is the entire modeline-format
+ or when it is found in a cons-cell or a list)
+ %b -- print buffer name. %c -- print the current column number.
+ %f -- print visited file name.
+ %* -- print %, * or hyphen. %+ -- print *, % or hyphen.
+ % means buffer is read-only and * means it is modified.
+ For a modified read-only buffer, %* gives % and %+ gives *.
+ %s -- print process status. %l -- print the current line number.
+ %S -- print name of selected frame (only meaningful under X Windows).
+ %p -- print percent of buffer above top of window, or Top, Bot or All.
+ %P -- print percent of buffer above bottom of window, perhaps plus Top,
+ or print Bottom or All.
+ %n -- print Narrow if appropriate.
+ %C -- under XEmacs/mule, print the mnemonic for `buffer-file-coding-system'.
+ %[ -- print one [ for each recursive editing level. %] similar.
+ %% -- print %. %- -- print infinitely many dashes.
+Decimal digits after the % specify field width to which to pad.
+*/ );
+
+ DEFVAR_BUFFER_DEFAULTS ("default-major-mode", major_mode /*
+*Major mode for new buffers. Defaults to `fundamental-mode'.
+nil here means use current buffer's major mode.
+*/ );
+
+ DEFVAR_BUFFER_DEFAULTS ("fundamental-mode-abbrev-table", abbrev_table /*
+The abbrev table of mode-specific abbrevs for Fundamental Mode.
+*/ );
+
+ DEFVAR_BUFFER_LOCAL ("major-mode", major_mode /*
+Symbol for current buffer's major mode.
+*/ );
+
+ DEFVAR_BUFFER_LOCAL ("mode-name", mode_name /*
+Pretty name of current buffer's major mode (a string).
+*/ );
+
+ DEFVAR_BUFFER_LOCAL ("abbrev-mode", abbrev_mode /*
+Non-nil turns on automatic expansion of abbrevs as they are inserted.
+Automatically becomes buffer-local when set in any fashion.
+*/ );
+
+ DEFVAR_BUFFER_LOCAL ("case-fold-search", case_fold_search /*
+*Non-nil if searches should ignore case.
+Automatically becomes buffer-local when set in any fashion.
+*/ );
+
+ DEFVAR_BUFFER_LOCAL ("fill-column", fill_column /*
+*Column beyond which automatic line-wrapping should happen.
+Automatically becomes buffer-local when set in any fashion.
+*/ );
+
+ DEFVAR_BUFFER_LOCAL ("left-margin", left_margin /*
+*Column for the default indent-line-function to indent to.
+Linefeed indents to this column in Fundamental mode.
+Automatically becomes buffer-local when set in any fashion.
+Do not confuse this with the specifier `left-margin-width';
+that controls the size of a margin that is displayed outside
+of the text area.
+*/ );
+
+ DEFVAR_BUFFER_LOCAL_MAGIC ("tab-width", tab_width /*
+*Distance between tab stops (for display of tab characters), in columns.
+Automatically becomes buffer-local when set in any fashion.
+*/ , redisplay_variable_changed);
+
+ DEFVAR_BUFFER_LOCAL_MAGIC ("ctl-arrow", ctl_arrow /*
+*Non-nil means display control chars with uparrow.
+Nil means use backslash and octal digits.
+An integer means characters >= ctl-arrow are assumed to be printable, and
+will be displayed as a single glyph.
+Any other value is the same as 160 - the code SPC with the high bit on.
+
+The interpretation of this variable is likely to change in the future.
+
+Automatically becomes buffer-local when set in any fashion.
+This variable does not apply to characters whose display is specified
+in the current display table (if there is one).
+*/ , redisplay_variable_changed);
+
+#if 0 /* #### Make this a specifier! */
+ xxDEFVAR_BUFFER_LOCAL ("display-direction", display_direction /*
+*Non-nil means lines in the buffer are displayed right to left.
+Nil means left to right. (Not yet implemented.)
+*/ );
+#endif /* Not yet implemented */
+
+ DEFVAR_BUFFER_LOCAL_MAGIC ("truncate-lines", truncate_lines /*
+*Non-nil means do not display continuation lines;
+give each line of text one frame line.
+Automatically becomes buffer-local when set in any fashion.
+
+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.
+*/ , redisplay_variable_changed);
+
+ DEFVAR_BUFFER_LOCAL ("default-directory", directory /*
+Name of default directory of current buffer. Should end with slash.
+Each buffer has its own value of this variable.
+*/ );
+
+#ifdef FILE_CODING
+ DEFVAR_BUFFER_DEFAULTS ("default-buffer-file-coding-system", buffer_file_coding_system /*
+Default value of `buffer-file-coding-system' for buffers that do not override it.
+This is the same as (default-value 'buffer-file-coding-system).
+This value is used both for buffers without associated files and
+for buffers whose files do not have any apparent coding system.
+See `buffer-file-coding-system'.
+*/ );
+
+ DEFVAR_BUFFER_LOCAL ("buffer-file-coding-system", buffer_file_coding_system /*
+*Current coding system for the current buffer.
+When the buffer is written out into a file, this coding system will be
+used for the encoding. Automatically buffer-local when set in any
+fashion. This is normally set automatically when a file is loaded in
+based on the determined coding system of the file (assuming that
+`buffer-file-coding-system-for-read' is set to `undecided', which
+calls for automatic determination of the file's coding system).
+Normally the modeline indicates the current file coding system using
+its mnemonic abbreviation.
+
+The default value for this variable (which is normally used for
+buffers without associated files) is also used when automatic
+detection of a file's encoding is called for and there was no
+discernible encoding in the file (i.e. it was entirely or almost
+entirely ASCII). The default value should generally *not* be set to
+nil (equivalent to `no-conversion'), because if extended characters
+are ever inserted into the buffer, they will be lost when the file is
+written out. A good choice is `iso-2022-8' (the simple ISO 2022 8-bit
+encoding), which will write out ASCII and Latin-1 characters in the
+standard (and highly portable) fashion and use standard escape
+sequences for other charsets. Another reasonable choice is
+`escape-quoted', which is equivalent to `iso-2022-8' but prefixes
+certain control characters with ESC to make sure they are not
+interpreted as escape sequences when read in. This latter coding
+system results in more "correct" output in the presence of control
+characters in the buffer, in the sense that when read in again using
+the same coding system, the result will virtually always match the
+original contents of the buffer, which is not the case with
+`iso-2022-8'; but the output is less portable when dealing with binary
+data -- there may be stray ESC characters when the file is read by
+another program.
+
+`buffer-file-coding-system' does *not* control the coding system used when
+a file is read in. Use the variables `buffer-file-coding-system-for-read'
+and `buffer-file-coding-system-alist' for that. From a Lisp program, if
+you wish to unilaterally specify the coding system used for one
+particular operation, you should bind the variable
+`coding-system-for-read' rather than changing the other two
+variables just mentioned, which are intended to be used for
+global environment specification.
+*/ );
+#endif /* FILE_CODING */
+
+ DEFVAR_BUFFER_LOCAL ("auto-fill-function", auto_fill_function /*
+Function called (if non-nil) to perform auto-fill.
+It is called after self-inserting a space at a column beyond `fill-column'.
+Each buffer has its own value of this variable.
+NOTE: This variable is not an ordinary hook;
+It may not be a list of functions.
+*/ );
+
+ DEFVAR_BUFFER_LOCAL ("buffer-file-name", filename /*
+Name of file visited in current buffer, or nil if not visiting a file.
+Each buffer has its own value of this variable.
+*/ );
+
+#if 0 /* FSFmacs */
+/*
+Abbreviated truename of file visited in current buffer, or nil if none.
+The truename of a file is calculated by `file-truename'
+and then abbreviated with `abbreviate-file-name'.
+Each buffer has its own value of this variable.
+*/
+#endif /* FSFmacs */
+
+ DEFVAR_BUFFER_LOCAL ("buffer-file-truename", file_truename /*
+The real name of the file visited in the current buffer,
+or nil if not visiting a file. This is the result of passing
+buffer-file-name to the `file-truename' function. Every buffer has
+its own value of this variable. This variable is automatically
+maintained by the functions that change the file name associated
+with a buffer.
+*/ );
+
+ DEFVAR_BUFFER_LOCAL ("buffer-auto-save-file-name", auto_save_file_name /*
+Name of file for auto-saving current buffer,
+or nil if buffer should not be auto-saved.
+Each buffer has its own value of this variable.
+*/ );
+
+ DEFVAR_BUFFER_LOCAL ("buffer-read-only", read_only /*
+Non-nil if this buffer is read-only.
+Each buffer has its own value of this variable.
+*/ );
+
+ DEFVAR_BUFFER_LOCAL ("buffer-backed-up", backed_up /*
+Non-nil if this buffer's file has been backed up.
+Backing up is done before the first time the file is saved.
+Each buffer has its own value of this variable.
+*/ );
+
+ DEFVAR_BUFFER_LOCAL ("buffer-saved-size", saved_size /*
+Length of current buffer when last read in, saved or auto-saved.
+0 initially.
+Each buffer has its own value of this variable.
+*/ );
+
+ DEFVAR_BUFFER_LOCAL_MAGIC ("selective-display", selective_display /*
+Non-nil enables selective display:
+Integer N as value means display only lines
+ that start with less than n columns of space.
+A value of t means, after a ^M, all the rest of the line is invisible.
+ Then ^M's in the file are written into files as newlines.
+
+Automatically becomes buffer-local when set in any fashion.
+*/, redisplay_variable_changed);
+
+#ifndef old
+ DEFVAR_BUFFER_LOCAL_MAGIC ("selective-display-ellipses",
+ selective_display_ellipses /*
+t means display ... on previous line when a line is invisible.
+Automatically becomes buffer-local when set in any fashion.
+*/, redisplay_variable_changed);
+#endif
+
+ DEFVAR_BUFFER_LOCAL ("local-abbrev-table", abbrev_table /*
+Local (mode-specific) abbrev table of current buffer.
+*/ );
+
+ DEFVAR_BUFFER_LOCAL ("overwrite-mode", overwrite_mode /*
+Non-nil if self-insertion should replace existing text.
+The value should be one of `overwrite-mode-textual',
+`overwrite-mode-binary', or nil.
+If it is `overwrite-mode-textual', self-insertion still
+inserts at the end of a line, and inserts when point is before a tab,
+until the tab is filled in.
+If `overwrite-mode-binary', self-insertion replaces newlines and tabs too.
+Automatically becomes buffer-local when set in any fashion.
+
+Normally, you shouldn't modify this variable by hand, but use the functions
+`overwrite-mode' and `binary-overwrite-mode' instead. However, you can
+customize the default value from the options menu.
+*/ );
+
+#if 0 /* FSFmacs */
+ /* Adds the following to the doc string for buffer-undo-list:
+
+An entry (nil PROPERTY VALUE BEG . END) indicates that a text property
+was modified between BEG and END. PROPERTY is the property name,
+and VALUE is the old value.
+*/
+#endif /* FSFmacs */
+
+ DEFVAR_BUFFER_LOCAL ("buffer-undo-list", undo_list /*
+List of undo entries in current buffer.
+Recent changes come first; older changes follow newer.
+
+An entry (START . END) represents an insertion which begins at
+position START and ends at position END.
+
+An entry (TEXT . POSITION) represents the deletion of the string TEXT
+from (abs POSITION). If POSITION is positive, point was at the front
+of the text being deleted; if negative, point was at the end.
+
+An entry (t HIGH . LOW) indicates that the buffer previously had
+"unmodified" status. HIGH and LOW are the high and low 16-bit portions
+of the visited file's modification time, as of that time. If the
+modification time of the most recent save is different, this entry is
+obsolete.
+
+An entry of the form EXTENT indicates that EXTENT was attached in
+the buffer. Undoing an entry of this form detaches EXTENT.
+
+An entry of the form (EXTENT START END) indicates that EXTENT was
+detached from the buffer. Undoing an entry of this form attaches
+EXTENT from START to END.
+
+An entry of the form POSITION indicates that point was at the buffer
+location given by the integer. Undoing an entry of this form places
+point at POSITION.
+
+nil marks undo boundaries. The undo command treats the changes
+between two undo boundaries as a single step to be undone.
+
+If the value of the variable is t, undo information is not recorded.
+*/ );
+
+#if 0 /* FSFmacs */
+ xxDEFVAR_BUFFER_LOCAL ("mark-active", mark_active /*
+Non-nil means the mark and region are currently active in this buffer.
+Automatically local in all buffers.
+*/ );
+#endif /* FSFmacs */
+
+#ifdef REGION_CACHE_NEEDS_WORK
+ xxDEFVAR_BUFFER_LOCAL ("cache-long-line-scans", cache_long_line_scans /*
+Non-nil means that Emacs should use caches to handle long lines more quickly.
+This variable is buffer-local, in all buffers.
+
+Normally, the line-motion functions work by scanning the buffer for
+newlines. Columnar operations (like move-to-column and
+compute-motion) also work by scanning the buffer, summing character
+widths as they go. This works well for ordinary text, but if the
+buffer's lines are very long (say, more than 500 characters), these
+motion functions will take longer to execute. Emacs may also take
+longer to update the display.
+
+If cache-long-line-scans is non-nil, these motion functions cache the
+results of their scans, and consult the cache to avoid rescanning
+regions of the buffer until the text is modified. The caches are most
+beneficial when they prevent the most searching---that is, when the
+buffer contains long lines and large regions of characters with the
+same, fixed screen width.
+
+When cache-long-line-scans is non-nil, processing short lines will
+become slightly slower (because of the overhead of consulting the
+cache), and the caches will use memory roughly proportional to the
+number of newlines and characters whose screen width varies.
+
+The caches require no explicit maintenance; their accuracy is
+maintained internally by the Emacs primitives. Enabling or disabling
+the cache should not affect the behavior of any of the motion
+functions; it should only affect their performance.
+*/ );
+#endif /* REGION_CACHE_NEEDS_WORK */
+
+ DEFVAR_BUFFER_LOCAL ("point-before-scroll", point_before_scroll /*
+Value of point before the last series of scroll operations, or nil.
+*/ );
+
+ DEFVAR_BUFFER_LOCAL ("buffer-file-format", file_format /*
+List of formats to use when saving this buffer.
+Formats are defined by `format-alist'. This variable is
+set when a file is visited. Automatically local in all buffers.
+*/ );
+
+ DEFVAR_BUFFER_LOCAL_MAGIC ("buffer-invisibility-spec", invisibility_spec /*
+Invisibility spec of this buffer.
+The default is t, which means that text is invisible
+if it has (or is covered by an extent with) a non-nil `invisible' property.
+If the value is a list, a text character is invisible if its `invisible'
+property is an element in that list.
+If an element is a cons cell of the form (PROPERTY . ELLIPSIS),
+then characters with property value PROPERTY are invisible,
+and they have an ellipsis as well if ELLIPSIS is non-nil.
+Note that the actual characters used for the ellipsis are controllable
+using `invisible-text-glyph', and default to "...".
+*/, redisplay_variable_changed);
+
+ DEFVAR_CONST_BUFFER_LOCAL ("generated-modeline-string",
+ generated_modeline_string /*
+String of characters in this buffer's modeline as of the last redisplay.
+Each time the modeline is recomputed, the resulting characters are
+stored in this string, which is resized as necessary. You may not
+set this variable, and modifying this string will not change the
+modeline; you have to change `modeline-format' if you want that.
+
+For each extent in `modeline-format' that is encountered when
+processing the modeline, a corresponding extent is placed in
+`generated-modeline-string' and covers the text over which the
+extent in `modeline-format' applies. The extent in
+`generated-modeline-string' is made a child of the extent in
+`modeline-format', which means that it inherits all properties from
+that extent. Note that the extents in `generated-modeline-string'
+are managed automatically. You should not explicitly put any extents
+in `generated-modeline-string'; if you do, they will disappear the
+next time the modeline is processed.
+
+For extents in `modeline-format', the following properties are currently
+handled:
+
+`face'
+ Affects the face of the modeline text. Currently, faces do
+ not merge properly; only the most recently encountered face
+ is used. This is a bug.
+
+`keymap'
+ Affects the disposition of button events over the modeline
+ text. Multiple applicable keymaps *are* handled properly,
+ and `modeline-map' still applies to any events that don't
+ have bindings in extent-specific keymaps.
+
+`help-echo'
+ If a string, causes the string to be displayed when the mouse
+ moves over the text.
+*/ );
+
+ /* Check for DEFVAR_BUFFER_LOCAL without initializing the corresponding
+ slot of buffer_local_flags and vice-versa. Must be done after all
+ DEFVAR_BUFFER_LOCAL() calls. */
+#define MARKED_SLOT(slot) \
+ if ((XINT (buffer_local_flags.slot) != -2 && \
+ XINT (buffer_local_flags.slot) != -3) \
+ != !(NILP (XBUFFER (Vbuffer_local_symbols)->slot))) \
+ ABORT ()
+#include "bufslots.h"
+#undef MARKED_SLOT
+
+ {
+ Lisp_Object scratch = Fget_buffer_create (QSscratch);
+ Fset_buffer (scratch);
+ /* Want no undo records for *scratch* until after Emacs is dumped */
+ Fbuffer_disable_undo (scratch);
+ }
+}
+
+#ifndef WIN32_NATIVE
+/* Is PWD another name for `.' ? */
+static int
+directory_is_current_directory (Extbyte *pwd)
+{
+ Bufbyte *pwd_internal;
+ Bytecount pwd_internal_len;
+ struct stat dotstat, pwdstat;
+
+ TO_INTERNAL_FORMAT (DATA, (pwd, strlen ((char *)pwd) + 1),
+ ALLOCA, (pwd_internal, pwd_internal_len),
+ Qfile_name);
+
+ return (IS_DIRECTORY_SEP (*pwd_internal)
+ && xemacs_stat ((char *) pwd_internal, &pwdstat) == 0
+ && xemacs_stat (".", &dotstat) == 0
+ && dotstat.st_ino == pwdstat.st_ino
+ && dotstat.st_dev == pwdstat.st_dev
+ && pwd_internal_len < MAXPATHLEN);
+}
+#endif
+
+void
+init_initial_directory (void)
+{
+ /* This function can GC */
+
+#ifndef WIN32_NATIVE
+ Extbyte *pwd;
+#endif
+
+ initial_directory[0] = 0;
+
+ /* If PWD is accurate, use it instead of calling getcwd. This is faster
+ when PWD is right, and may avoid a fatal error. */
+#ifndef WIN32_NATIVE
+ if ((pwd = (Extbyte *) getenv ("PWD")) != NULL
+ && directory_is_current_directory (pwd))
+ strcpy (initial_directory, (char *) pwd);
+ else
+#endif
+ if (getcwd (initial_directory, MAXPATHLEN) == NULL)
+ fatal ("`getcwd' failed: %s\n", strerror (errno));
+
+ /* Make sure pwd is DIRECTORY_SEP-terminated.
+ Maybe this should really use some standard subroutine
+ whose definition is filename syntax dependent. */
+ {
+ int len = strlen (initial_directory);
+
+ if (! IS_DIRECTORY_SEP (initial_directory[len - 1]))
+ {
+ initial_directory[len] = DIRECTORY_SEP;
+ initial_directory[len + 1] = '\0';
+ }
+ }
+
+#ifdef CORRECT_DIR_SEPS
+ CORRECT_DIR_SEPS (initial_directory);
+#endif
+}
+
+void
+init_buffer (void)
+{
+ /* This function can GC */
+
+ Fset_buffer (Fget_buffer_create (QSscratch));
+
+ current_buffer->directory =
+ build_ext_string (initial_directory, Qfile_name);
+
+#if 0 /* FSFmacs */
+ /* #### is this correct? */
+ temp = get_minibuffer (0);
+ XBUFFER (temp)->directory = current_buffer->directory;
+#endif /* FSFmacs */
+}
projects / chise / xemacs-chise.git / blobdiff