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emacs/src/macros.c
Paul Eggert 58f2d6ef32 Compute C decls for DEFSYMs automatically 
Fixes Bug#15880.
This patch also makes Q constants (e.g., Qnil) constant addresses
from the C point of view.
* make-docfile.c: Revamp to generate table of symbols, too.
Include <stdbool.h>.
(xstrdup): New function.
(main): Don't process the same file twice.
(SYMBOL): New constant in enum global_type.
(struct symbol): Turn 'value' member into a union, either v.value
for int or v.svalue for string.  All uses changed.
(add_global): New arg svalue, which overrides value, so that globals
can have a string value.
(close_emacs_global): New arg num_symbols; all uses changed.
Output lispsym decl.
(write_globals): Output symbol globals too.  Output more
ATTRIBUTE_CONST, now that Qnil etc. are C constants.
Output defsym_name table.
(scan_c_file): Move most of guts into ...
(scan_c_stream): ... new function.  Scan for DEFSYMs and
record symbols found.  Don't read past EOF if file doesn't
end in newline.
* alloc.c, bidi.c, buffer.c, bytecode.c, callint.c, casefiddle:
* casetab.c, category.c, ccl.c, charset.c, chartab.c, cmds.c, coding.c:
* composite.c, data.c, dbusbind.c, decompress.c, dired.c, dispnew.c:
* doc.c, editfns.c, emacs.c, eval.c, fileio.c, fns.c, font.c, fontset.c:
* frame.c, fringe.c, ftfont.c, ftxfont.c, gfilenotify.c, gnutls.c:
* image.c, inotify.c, insdel.c, keyboard.c, keymap.c, lread.c:
* macfont.m, macros.c, minibuf.c, nsfns.m, nsfont.m, nsimage.m:
* nsmenu.m, nsselect.m, nsterm.m, print.c, process.c, profiler.c:
* search.c, sound.c, syntax.c, term.c, terminal.c, textprop.c, undo.c:
* window.c, xdisp.c, xfaces.c, xfns.c, xftfont.c, xmenu.c, xml.c:
* xselect.c, xsettings.c, xterm.c:
Remove Q vars that represent symbols (e.g., Qnil, Qt, Qemacs).
These names are now defined automatically by make-docfile.
* alloc.c (init_symbol): New function.
(Fmake_symbol): Use it.
(c_symbol_p): New function.
(valid_lisp_object_p, purecopy): Use it.
* alloc.c (marked_pinned_symbols):
Use make_lisp_symbol instead of make_lisp_ptr.
(garbage_collect_1): Mark lispsym symbols.
(CHECK_ALLOCATED_AND_LIVE_SYMBOL): New macro.
(mark_object): Use it.
(sweep_symbols): Sweep lispsym symbols.
(symbol_uses_obj): New function.
(which_symbols): Use it.  Work for lispsym symbols, too.
(init_alloc_once): Initialize Vpurify_flag here; no need to wait,
since Qt's address is already known now.
(syms_of_alloc): Add lispsym count to symbols_consed.
* buffer.c (init_buffer_once): Compare to Qnil, not to make_number (0),
when testing whether storage is all bits zero.
* dispextern (struct image_type):
* font.c (font_property_table):
* frame.c (struct frame_parm_table, frame_parms):
* keyboard.c (scroll_bar_parts, struct event_head):
* xdisp.c (struct props):
Use XSYMBOL_INIT (Qfoo) and struct Lisp_Symbol * rather than &Qfoo and
Lisp_Object *, since Qfoo is no longer an object whose address can be
taken.  All uses changed.
* eval.c (run_hook): New function.  Most uses of Frun_hooks changed to
use it, so that they no longer need to take the address of a Lisp sym.
(syms_of_eval): Don't use DEFSYM on Vrun_hooks, as it's a variable.
* frame.c (syms_of_frame): Add defsyms for the frame_parms table.
* keyboard.c (syms_of_keyboard): Don't DEFSYM Qmenu_bar here.
DEFSYM Qdeactivate_mark before the corresponding var.
* keymap.c (syms_of_keymap): Use DEFSYM for Qmenu_bar and Qmode_line
instead of interning their symbols; this avoids duplicates.
(LISP_INITIALLY, TAG_PTR)
(DEFINE_LISP_SYMBOL_BEGIN, DEFINE_LISP_SYMBOL_END, XSYMBOL_INIT):
New macros.
(LISP_INITIALLY_ZERO): Use it.
(enum symbol_interned, enum symbol_redirect, struct Lisp_Symbol)
(EXFUN, DEFUN_ARGS_MANY, DEFUN_ARGS_UNEVALLED, DEFUN_ARGS_*):
Move decls up, to avoid forward uses.  Include globals.h earlier, too.
(make_lisp_symbol): New function.
(XSETSYMBOL): Use it.
(DEFSYM): Now just a placeholder for make-docfile.
* lread.c (DEFINE_SYMBOLS): Define, for globals.h.
(intern_sym): New function, with body taken from old intern_driver.
(intern_driver): Use it.  Last arg is now Lisp integer, not ptrdiff_t.
All uses changed.
(define_symbol): New function.
(init_obarray): Define the C symbols taken from lispsym.
Use plain DEFSYM for Qt and Qnil.
* syntax.c (init_syntax_once): No need to worry about
Qchar_table_extra_slots.
2015-01-05 10:14:58 -08:00

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/* Keyboard macros.
Copyright (C) 1985-1986, 1993, 2000-2015 Free Software Foundation, Inc.
This file is part of GNU Emacs.
GNU Emacs 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 3 of the License, or
(at your option) any later version.
GNU Emacs 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 GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
#include <config.h>
#include "lisp.h"
#include "macros.h"
#include "commands.h"
#include "character.h"
#include "buffer.h"
#include "window.h"
#include "keyboard.h"
/* Number of successful iterations so far
for innermost keyboard macro.
This is not bound at each level,
so after an error, it describes the innermost interrupted macro. */
EMACS_INT executing_kbd_macro_iterations;
/* This is the macro that was executing.
This is not bound at each level,
so after an error, it describes the innermost interrupted macro.
We use it only as a kind of flag, so no need to protect it. */
Lisp_Object executing_kbd_macro;
DEFUN ("start-kbd-macro", Fstart_kbd_macro, Sstart_kbd_macro, 1, 2, "P",
doc: /* Record subsequent keyboard input, defining a keyboard macro.
The commands are recorded even as they are executed.
Use \\[end-kbd-macro] to finish recording and make the macro available.
Use \\[name-last-kbd-macro] to give it a permanent name.
Non-nil arg (prefix arg) means append to last macro defined;
this begins by re-executing that macro as if you typed it again.
If optional second arg, NO-EXEC, is non-nil, do not re-execute last
macro before appending to it. */)
(Lisp_Object append, Lisp_Object no_exec)
{
if (!NILP (KVAR (current_kboard, defining_kbd_macro)))
error ("Already defining kbd macro");
if (!current_kboard->kbd_macro_buffer)
{
current_kboard->kbd_macro_buffer = xmalloc (30 * word_size);
current_kboard->kbd_macro_bufsize = 30;
current_kboard->kbd_macro_ptr = current_kboard->kbd_macro_buffer;
current_kboard->kbd_macro_end = current_kboard->kbd_macro_buffer;
}
update_mode_lines = 19;
if (NILP (append))
{
if (current_kboard->kbd_macro_bufsize > 200)
{
current_kboard->kbd_macro_buffer
= xrealloc (current_kboard->kbd_macro_buffer,
30 * word_size);
current_kboard->kbd_macro_bufsize = 30;
}
current_kboard->kbd_macro_ptr = current_kboard->kbd_macro_buffer;
current_kboard->kbd_macro_end = current_kboard->kbd_macro_buffer;
message1 ("Defining kbd macro...");
}
else
{
int incr = 30;
ptrdiff_t i, len;
bool cvt;
/* Check the type of last-kbd-macro in case Lisp code changed it. */
len = CHECK_VECTOR_OR_STRING (KVAR (current_kboard, Vlast_kbd_macro));
/* Copy last-kbd-macro into the buffer, in case the Lisp code
has put another macro there. */
if (current_kboard->kbd_macro_bufsize - incr < len)
current_kboard->kbd_macro_buffer =
xpalloc (current_kboard->kbd_macro_buffer,
&current_kboard->kbd_macro_bufsize,
len - current_kboard->kbd_macro_bufsize + incr, -1,
sizeof *current_kboard->kbd_macro_buffer);
/* Must convert meta modifier when copying string to vector. */
cvt = STRINGP (KVAR (current_kboard, Vlast_kbd_macro));
for (i = 0; i < len; i++)
{
Lisp_Object c;
c = Faref (KVAR (current_kboard, Vlast_kbd_macro), make_number (i));
if (cvt && NATNUMP (c) && (XFASTINT (c) & 0x80))
XSETFASTINT (c, CHAR_META | (XFASTINT (c) & ~0x80));
current_kboard->kbd_macro_buffer[i] = c;
}
current_kboard->kbd_macro_ptr = current_kboard->kbd_macro_buffer + len;
current_kboard->kbd_macro_end = current_kboard->kbd_macro_ptr;
/* Re-execute the macro we are appending to,
for consistency of behavior. */
if (NILP (no_exec))
Fexecute_kbd_macro (KVAR (current_kboard, Vlast_kbd_macro),
make_number (1), Qnil);
message1 ("Appending to kbd macro...");
}
kset_defining_kbd_macro (current_kboard, Qt);
return Qnil;
}
/* Finish defining the current keyboard macro. */
void
end_kbd_macro (void)
{
kset_defining_kbd_macro (current_kboard, Qnil);
update_mode_lines = 20;
kset_last_kbd_macro
(current_kboard,
make_event_array ((current_kboard->kbd_macro_end
- current_kboard->kbd_macro_buffer),
current_kboard->kbd_macro_buffer));
}
DEFUN ("end-kbd-macro", Fend_kbd_macro, Send_kbd_macro, 0, 2, "p",
doc: /* Finish defining a keyboard macro.
The definition was started by \\[start-kbd-macro].
The macro is now available for use via \\[call-last-kbd-macro],
or it can be given a name with \\[name-last-kbd-macro] and then invoked
under that name.
With numeric arg, repeat macro now that many times,
counting the definition just completed as the first repetition.
An argument of zero means repeat until error.
In Lisp, optional second arg LOOPFUNC may be a function that is called prior to
each iteration of the macro. Iteration stops if LOOPFUNC returns nil. */)
(Lisp_Object repeat, Lisp_Object loopfunc)
{
if (NILP (KVAR (current_kboard, defining_kbd_macro)))
error ("Not defining kbd macro");
if (NILP (repeat))
XSETFASTINT (repeat, 1);
else
CHECK_NUMBER (repeat);
if (!NILP (KVAR (current_kboard, defining_kbd_macro)))
{
end_kbd_macro ();
message1 ("Keyboard macro defined");
}
if (XFASTINT (repeat) == 0)
Fexecute_kbd_macro (KVAR (current_kboard, Vlast_kbd_macro), repeat, loopfunc);
else if (XINT (repeat) > 1)
{
XSETINT (repeat, XINT (repeat) - 1);
Fexecute_kbd_macro (KVAR (current_kboard, Vlast_kbd_macro),
repeat, loopfunc);
}
return Qnil;
}
/* Store character c into kbd macro being defined. */
void
store_kbd_macro_char (Lisp_Object c)
{
struct kboard *kb = current_kboard;
if (!NILP (KVAR (kb, defining_kbd_macro)))
{
if (kb->kbd_macro_ptr - kb->kbd_macro_buffer == kb->kbd_macro_bufsize)
{
ptrdiff_t ptr_offset, end_offset, nbytes;
ptr_offset = kb->kbd_macro_ptr - kb->kbd_macro_buffer;
end_offset = kb->kbd_macro_end - kb->kbd_macro_buffer;
if (min (PTRDIFF_MAX, SIZE_MAX) / sizeof *kb->kbd_macro_buffer / 2
< kb->kbd_macro_bufsize)
memory_full (SIZE_MAX);
nbytes = kb->kbd_macro_bufsize * (2 * sizeof *kb->kbd_macro_buffer);
kb->kbd_macro_buffer = xrealloc (kb->kbd_macro_buffer, nbytes);
kb->kbd_macro_bufsize *= 2;
kb->kbd_macro_ptr = kb->kbd_macro_buffer + ptr_offset;
kb->kbd_macro_end = kb->kbd_macro_buffer + end_offset;
}
*kb->kbd_macro_ptr++ = c;
}
}
/* Declare that all chars stored so far in the kbd macro being defined
really belong to it. This is done in between editor commands. */
void
finalize_kbd_macro_chars (void)
{
current_kboard->kbd_macro_end = current_kboard->kbd_macro_ptr;
}
DEFUN ("cancel-kbd-macro-events", Fcancel_kbd_macro_events,
Scancel_kbd_macro_events, 0, 0, 0,
doc: /* Cancel the events added to a keyboard macro for this command. */)
(void)
{
current_kboard->kbd_macro_ptr = current_kboard->kbd_macro_end;
return Qnil;
}
DEFUN ("store-kbd-macro-event", Fstore_kbd_macro_event,
Sstore_kbd_macro_event, 1, 1, 0,
doc: /* Store EVENT into the keyboard macro being defined. */)
(Lisp_Object event)
{
store_kbd_macro_char (event);
return Qnil;
}
DEFUN ("call-last-kbd-macro", Fcall_last_kbd_macro, Scall_last_kbd_macro,
0, 2, "p",
doc: /* Call the last keyboard macro that you defined with \\[start-kbd-macro].
A prefix argument serves as a repeat count. Zero means repeat until error.
To make a macro permanent so you can call it even after
defining others, use \\[name-last-kbd-macro].
In Lisp, optional second arg LOOPFUNC may be a function that is called prior to
each iteration of the macro. Iteration stops if LOOPFUNC returns nil. */)
(Lisp_Object prefix, Lisp_Object loopfunc)
{
/* Don't interfere with recognition of the previous command
from before this macro started. */
Vthis_command = KVAR (current_kboard, Vlast_command);
/* C-x z after the macro should repeat the macro. */
Vreal_this_command = KVAR (current_kboard, Vlast_kbd_macro);
if (! NILP (KVAR (current_kboard, defining_kbd_macro)))
error ("Can't execute anonymous macro while defining one");
else if (NILP (KVAR (current_kboard, Vlast_kbd_macro)))
error ("No kbd macro has been defined");
else
Fexecute_kbd_macro (KVAR (current_kboard, Vlast_kbd_macro), prefix, loopfunc);
/* command_loop_1 sets this to nil before it returns;
get back the last command within the macro
so that it can be last, again, after we return. */
Vthis_command = KVAR (current_kboard, Vlast_command);
return Qnil;
}
/* Restore Vexecuting_kbd_macro and executing_kbd_macro_index.
Called when the unwind-protect in Fexecute_kbd_macro gets invoked. */
static void
pop_kbd_macro (Lisp_Object info)
{
Lisp_Object tem;
Vexecuting_kbd_macro = XCAR (info);
tem = XCDR (info);
executing_kbd_macro_index = XINT (XCAR (tem));
Vreal_this_command = XCDR (tem);
run_hook (Qkbd_macro_termination_hook);
}
DEFUN ("execute-kbd-macro", Fexecute_kbd_macro, Sexecute_kbd_macro, 1, 3, 0,
doc: /* Execute MACRO as string of editor command characters.
MACRO can also be a vector of keyboard events. If MACRO is a symbol,
its function definition is used.
COUNT is a repeat count, or nil for once, or 0 for infinite loop.
Optional third arg LOOPFUNC may be a function that is called prior to
each iteration of the macro. Iteration stops if LOOPFUNC returns nil. */)
(Lisp_Object macro, Lisp_Object count, Lisp_Object loopfunc)
{
Lisp_Object final;
Lisp_Object tem;
ptrdiff_t pdlcount = SPECPDL_INDEX ();
EMACS_INT repeat = 1;
struct gcpro gcpro1, gcpro2;
EMACS_INT success_count = 0;
executing_kbd_macro_iterations = 0;
if (!NILP (count))
{
count = Fprefix_numeric_value (count);
repeat = XINT (count);
}
final = indirect_function (macro);
if (!STRINGP (final) && !VECTORP (final))
error ("Keyboard macros must be strings or vectors");
tem = Fcons (Vexecuting_kbd_macro,
Fcons (make_number (executing_kbd_macro_index),
Vreal_this_command));
record_unwind_protect (pop_kbd_macro, tem);
GCPRO2 (final, loopfunc);
do
{
Vexecuting_kbd_macro = final;
executing_kbd_macro = final;
executing_kbd_macro_index = 0;
kset_prefix_arg (current_kboard, Qnil);
if (!NILP (loopfunc))
{
Lisp_Object cont;
cont = call0 (loopfunc);
if (NILP (cont))
break;
}
command_loop_1 ();
executing_kbd_macro_iterations = ++success_count;
QUIT;
}
while (--repeat
&& (STRINGP (Vexecuting_kbd_macro) || VECTORP (Vexecuting_kbd_macro)));
executing_kbd_macro = Qnil;
Vreal_this_command = Vexecuting_kbd_macro;
UNGCPRO;
return unbind_to (pdlcount, Qnil);
}
void
init_macros (void)
{
Vexecuting_kbd_macro = Qnil;
executing_kbd_macro = Qnil;
}
void
syms_of_macros (void)
{
DEFSYM (Qexecute_kbd_macro, "execute-kbd-macro");
DEFVAR_LISP ("kbd-macro-termination-hook", Vkbd_macro_termination_hook,
doc: /* Normal hook run whenever a keyboard macro terminates.
This is run whether the macro ends normally or prematurely due to an error. */);
Vkbd_macro_termination_hook = Qnil;
DEFSYM (Qkbd_macro_termination_hook, "kbd-macro-termination-hook");
defsubr (&Sstart_kbd_macro);
defsubr (&Send_kbd_macro);
defsubr (&Scall_last_kbd_macro);
defsubr (&Sexecute_kbd_macro);
defsubr (&Scancel_kbd_macro_events);
defsubr (&Sstore_kbd_macro_event);
DEFVAR_KBOARD ("defining-kbd-macro", defining_kbd_macro,
doc: /* Non-nil while a keyboard macro is being defined. Don't set this!
The value is the symbol `append' while appending to the definition of
an existing macro. */);
DEFVAR_LISP ("executing-kbd-macro", Vexecuting_kbd_macro,
doc: /* Currently executing keyboard macro (string or vector).
This is nil when not executing a keyboard macro. */);
DEFVAR_INT ("executing-kbd-macro-index", executing_kbd_macro_index,
doc: /* Index in currently executing keyboard macro; undefined if none executing. */);
DEFVAR_KBOARD ("last-kbd-macro", Vlast_kbd_macro,
doc: /* Last kbd macro defined, as a string or vector; nil if none defined. */);
}
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