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[emacs.git] / src / lisp.h
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1 /* Fundamental definitions for GNU Emacs Lisp interpreter.
2 Copyright (C) 1985, 1986, 1987 Free Software Foundation, Inc.
4 This file is part of GNU Emacs.
6 GNU Emacs is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 1, or (at your option)
9 any later version.
11 GNU Emacs is distributed in the hope that it will be useful,
12 but WITHOUT ANY WARRANTY; without even the implied warranty of
13 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 GNU General Public License for more details.
16 You should have received a copy of the GNU General Public License
17 along with GNU Emacs; see the file COPYING. If not, write to
18 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
21 /* Define the fundamental Lisp data structures */
23 /* This is the set of Lisp data types */
25 enum Lisp_Type
27 /* Integer. XINT(obj) is the integer value. */
28 Lisp_Int,
30 /* Symbol. XSYMBOL (object) points to a struct Lisp_Symbol. */
31 Lisp_Symbol,
33 /* Marker (buffer ptr). XMARKER(object) points to a struct Lisp_Marker. */
34 Lisp_Marker,
36 /* String. XSTRING (object) points to a struct Lisp_String.
37 The length of the string, and its contents, are stored therein. */
38 Lisp_String,
40 /* Vector of Lisp objects. XVECTOR(object) points to a struct Lisp_Vector.
41 The length of the vector, and its contents, are stored therein. */
42 Lisp_Vector,
44 /* Cons. XCONS (object) points to a struct Lisp_Cons. */
45 Lisp_Cons,
47 /* Byte-compiled function. A vector of 4 to 6 elements which are the
48 arglist, bytecode-string, constant vector, stack size,
49 (optional) doc string, and (optional) interactive spec. */
50 Lisp_Compiled,
52 /* Editor buffer. XBUFFER(obj) points to a struct buffer. */
53 Lisp_Buffer,
55 /* Built-in function. XSUBR(obj) points to a struct Lisp_Subr
56 which describes how to call the function, and its documentation,
57 as well as pointing to the code. */
58 Lisp_Subr,
60 /* Internal value return by subroutines of read.
61 The user never sees this data type.
62 Its value is just a number. */
63 Lisp_Internal,
65 /* Forwarding pointer to an int variable.
66 This is allowed only in the value cell of a symbol,
67 and it means that the symbol's value really lives in the
68 specified int variable.
69 XINTPTR(obj) points to the int variable. */
70 Lisp_Intfwd,
72 /* Boolean forwarding pointer to an int variable.
73 This is like Lisp_Intfwd except that the ostensible
74 "value" of the symbol is t if the int variable is nonzero,
75 nil if it is zero. XINTPTR(obj) points to the int variable. */
76 Lisp_Boolfwd,
78 /* Object describing a connection to a subprocess.
79 It points to storage of type struct Lisp_Process */
80 Lisp_Process,
82 /* Forwarding pointer to a Lisp_Object variable.
83 This is allowed only in the value cell of a symbol,
84 and it means that the symbol's value really lives in the
85 specified variable.
86 XOBJFWD(obj) points to the Lisp_Object variable. */
87 Lisp_Objfwd,
89 /* Pointer to a vector-like object describing a display screen
90 on which Emacs can display a window hierarchy. */
91 Lisp_Screen,
93 /* Used when a FILE * value needs to be passed
94 in an argument of type Lisp_Object.
95 You must do *(FILE **) XPNTR(obj) to get the value.
96 The user will never see this data type. */
97 Lisp_Internal_Stream,
99 /* Used in a symbol value cell when the symbol's value is per-buffer.
100 The actual contents are a cons cell which starts a list like this:
101 (REALVALUE BUFFER CURRENT-ALIST-ELEMENT . DEFAULT-VALUE)).
103 BUFFER is the last buffer for which this symbol's value was
104 made up to date.
106 CURRENT-ALIST-ELEMENT is a pointer to an element of BUFFER's
107 b_local_var_alist, that being the element whose car is this variable.
108 Or it can be a pointer to the (CURRENT-ALIST-ELEMENT . DEFAULT-VALUE), if BUFFER
109 does not have an element in its alist for this variable
110 (that is, if BUFFER sees the default value of this variable).
112 If we want to examine or set the value and BUFFER is current,
113 we just examine or set REALVALUE.
114 If BUFFER is not current, we store the current REALVALUE value into
115 CURRENT-ALIST-ELEMENT, then find the appropriate alist element for
116 the buffer now current and set up CURRENT-ALIST-ELEMENT.
117 Then we set REALVALUE out of that element, and store into BUFFER.
119 If we are setting the variable and the current buffer does not have
120 an alist entry for this variable, an alist entry is created.
122 Note that REALVALUE can be a forwarding pointer.
123 Each time it is examined or set, forwarding must be done. */
124 Lisp_Buffer_Local_Value,
126 /* Like Lisp_Buffer_Local_Value with one difference:
127 merely setting the variable while some buffer is current
128 does not cause that buffer to have its own local value of this variable.
129 Only make-local-variable does that. */
130 Lisp_Some_Buffer_Local_Value,
133 /* Like Lisp_Objfwd except that value lives in a slot
134 in the current buffer. Value is byte index of slot within buffer */
135 Lisp_Buffer_Objfwd,
137 /* In symbol value cell, means var is unbound.
138 In symbol function cell, means function name is undefined. */
139 Lisp_Void,
141 /* Window used for Emacs display.
142 Data inside looks like a Lisp_Vector. */
143 Lisp_Window,
145 /* Used by save,set,restore-window-configuration */
146 Lisp_Window_Configuration
148 #ifdef LISP_FLOAT_TYPE
150 Lisp_Float
151 #endif /* LISP_FLOAT_TYPE */
154 #ifndef NO_UNION_TYPE
156 #ifndef BIG_ENDIAN
158 /* Definition of Lisp_Object for little-endian machines. */
160 typedef
161 union Lisp_Object
163 /* Used for comparing two Lisp_Objects;
164 also, positive integers can be accessed fast this way. */
165 int i;
167 struct
169 int val: 24;
170 char type;
171 } s;
172 struct
174 unsigned int val: 24;
175 char type;
176 } u;
177 struct
179 unsigned int val: 24;
180 enum Lisp_Type type: 7;
181 /* The markbit is not really part of the value of a Lisp_Object,
182 and is always zero except during garbage collection. */
183 unsigned int markbit: 1;
184 } gu;
186 Lisp_Object;
188 #else /* If BIG_ENDIAN */
190 typedef
191 union Lisp_Object
193 /* Used for comparing two Lisp_Objects;
194 also, positive integers can be accessed fast this way. */
195 int i;
197 struct
199 char type;
200 int val: 24;
201 } s;
202 struct
204 char type;
205 unsigned int val: 24;
206 } u;
207 struct
209 /* The markbit is not really part of the value of a Lisp_Object,
210 and is always zero except during garbage collection. */
211 unsigned int markbit: 1;
212 enum Lisp_Type type: 7;
213 unsigned int val: 24;
214 } gu;
216 Lisp_Object;
218 #endif /* BIG_ENDIAN */
220 #endif /* NO_UNION_TYPE */
223 /* If union type is not wanted, define Lisp_Object as just a number
224 and define the macros below to extract fields by shifting */
226 #ifdef NO_UNION_TYPE
228 #define Lisp_Object int
230 /* These values are overridden by the m- file on some machines. */
231 #ifndef VALBITS
232 #define VALBITS 24
233 #endif
235 #ifndef GCTYPEBITS
236 #define GCTYPEBITS 7
237 #endif
239 #ifndef VALMASK
240 #define VALMASK ((1<<VALBITS) - 1)
241 #endif
242 #define GCTYPEMASK ((1<<GCTYPEBITS) - 1)
243 #define MARKBIT (1 << (VALBITS + GCTYPEBITS))
245 #endif /* NO_UNION_TYPE */
247 /* These macros extract various sorts of values from a Lisp_Object.
248 For example, if tem is a Lisp_Object whose type is Lisp_Cons,
249 XCONS (tem) is the struct Lisp_Cons * pointing to the memory for that cons. */
251 #ifdef NO_UNION_TYPE
253 /* One need to override this if there must be high bits set in data space
254 (doing the result of the below & ((1 << (GCTYPE + 1)) - 1) would work
255 on all machines, but would penalise machines which don't need it)
257 #ifndef XTYPE
258 #define XTYPE(a) ((enum Lisp_Type) ((a) >> VALBITS))
259 #endif
261 #ifndef XSETTYPE
262 #define XSETTYPE(a, b) ((a) = XUINT (a) | ((int)(b) << VALBITS))
263 #endif
265 /* Use XFASTINT for fast retrieval and storage of integers known
266 to be positive. This takes advantage of the fact that Lisp_Int is 0. */
267 #define XFASTINT(a) (a)
269 /* Extract the value of a Lisp_Object as a signed integer. */
271 #ifndef XINT /* Some machines need to do this differently. */
272 #define XINT(a) (((a) << INTBITS-VALBITS) >> INTBITS-VALBITS)
273 #endif
275 /* Extract the value as an unsigned integer. This is a basis
276 for extracting it as a pointer to a structure in storage. */
278 #ifndef XUINT
279 #define XUINT(a) ((a) & VALMASK)
280 #endif
282 #ifndef XPNTR
283 #ifdef HAVE_SHM
284 /* In this representation, data is found in two widely separated segments. */
285 extern int pure_size;
286 #define XPNTR(a) \
287 (XUINT (a) | (XUINT (a) > pure_size ? DATA_SEG_BITS : PURE_SEG_BITS))
288 #else /* not HAVE_SHM */
289 #ifdef DATA_SEG_BITS
290 /* This case is used for the rt-pc.
291 In the diffs I was given, it checked for ptr = 0
292 and did not adjust it in that case.
293 But I don't think that zero should ever be found
294 in a Lisp object whose data type says it points to something. */
295 #define XPNTR(a) (XUINT (a) | DATA_SEG_BITS)
296 #else
297 #define XPNTR(a) XUINT (a)
298 #endif
299 #endif /* not HAVE_SHM */
300 #endif /* no XPNTR */
302 #ifndef XSETINT
303 #define XSETINT(a, b) ((a) = ((a) & ~VALMASK) | ((b) & VALMASK))
304 #endif
306 #ifndef XSETUINT
307 #define XSETUINT(a, b) XSETINT (a, b)
308 #endif
310 #ifndef XSETPNTR
311 #define XSETPNTR(a, b) XSETINT (a, b)
312 #endif
314 #ifndef XSET
315 #define XSET(var, type, ptr) \
316 ((var) = ((int)(type) << VALBITS) + ((int) (ptr) & VALMASK))
317 #endif
319 /* During garbage collection, XGCTYPE must be used for extracting types
320 so that the mark bit is ignored. XMARKBIT accesses the markbit.
321 Markbits are used only in particular slots of particular structure types.
322 Other markbits are always zero.
323 Outside of garbage collection, all mark bits are always zero. */
325 #ifndef XGCTYPE
326 #define XGCTYPE(a) ((enum Lisp_Type) (((a) >> VALBITS) & GCTYPEMASK))
327 #endif
329 #if VALBITS + GCTYPEBITS == INTBITS - 1
330 /* Make XMARKBIT faster if mark bit is sign bit. */
331 #ifndef XMARKBIT
332 #define XMARKBIT(a) ((a) < 0)
333 #endif
334 #endif /* markbit is sign bit */
336 #ifndef XMARKBIT
337 #define XMARKBIT(a) ((a) & MARKBIT)
338 #endif
340 #ifndef XSETMARKBIT
341 #define XSETMARKBIT(a,b) ((a) = ((a) & ~MARKBIT) | ((b) ? MARKBIT : 0))
342 #endif
344 #ifndef XMARK
345 #define XMARK(a) ((a) |= MARKBIT)
346 #endif
348 #ifndef XUNMARK
349 #define XUNMARK(a) ((a) &= ~MARKBIT)
350 #endif
352 #endif /* NO_UNION_TYPE */
354 #ifndef NO_UNION_TYPE
356 #define XTYPE(a) ((enum Lisp_Type) (a).u.type)
357 #define XSETTYPE(a, b) ((a).u.type = (char) (b))
359 /* Use XFASTINT for fast retrieval and storage of integers known
360 to be positive. This takes advantage of the fact that Lisp_Int is 0. */
361 #define XFASTINT(a) ((a).i)
363 #ifdef EXPLICIT_SIGN_EXTEND
364 /* Make sure we sign-extend; compilers have been known to fail to do so. */
365 #define XINT(a) (((a).i << 8) >> 8)
366 #else
367 #define XINT(a) ((a).s.val)
368 #endif /* EXPLICIT_SIGN_EXTEND */
370 #define XUINT(a) ((a).u.val)
371 #define XPNTR(a) ((a).u.val)
372 #define XSETINT(a, b) ((a).s.val = (int) (b))
373 #define XSETUINT(a, b) ((a).s.val = (int) (b))
374 #define XSETPNTR(a, b) ((a).s.val = (int) (b))
376 #define XSET(var, vartype, ptr) \
377 (((var).s.type = ((char) (vartype))), ((var).s.val = ((int) (ptr))))
379 /* During garbage collection, XGCTYPE must be used for extracting types
380 so that the mark bit is ignored. XMARKBIT access the markbit.
381 Markbits are used only in particular slots of particular structure types.
382 Other markbits are always zero.
383 Outside of garbage collection, all mark bits are always zero. */
385 #define XGCTYPE(a) ((a).gu.type)
386 #define XMARKBIT(a) ((a).gu.markbit)
387 #define XSETMARKBIT(a,b) (XMARKBIT(a) = (b))
388 #define XMARK(a) (XMARKBIT(a) = 1)
389 #define XUNMARK(a) (XMARKBIT(a) = 0)
391 #endif /* NO_UNION_TYPE */
394 #define XCONS(a) ((struct Lisp_Cons *) XPNTR(a))
395 #define XBUFFER(a) ((struct buffer *) XPNTR(a))
396 #define XVECTOR(a) ((struct Lisp_Vector *) XPNTR(a))
397 #define XSUBR(a) ((struct Lisp_Subr *) XPNTR(a))
398 #define XSTRING(a) ((struct Lisp_String *) XPNTR(a))
399 #define XSYMBOL(a) ((struct Lisp_Symbol *) XPNTR(a))
400 #define XFUNCTION(a) ((Lisp_Object (*)()) XPNTR(a))
401 #define XMARKER(a) ((struct Lisp_Marker *) XPNTR(a))
402 #define XOBJFWD(a) ((Lisp_Object *) XPNTR(a))
403 #define XINTPTR(a) ((int *) XPNTR(a))
404 #define XWINDOW(a) ((struct window *) XPNTR(a))
405 #define XPROCESS(a) ((struct Lisp_Process *) XPNTR(a))
406 #define XFLOAT(a) ((struct Lisp_Float *) XPNTR(a))
408 #define XSETCONS(a, b) XSETPNTR(a, (int) (b))
409 #define XSETBUFFER(a, b) XSETPNTR(a, (int) (b))
410 #define XSETVECTOR(a, b) XSETPNTR(a, (int) (b))
411 #define XSETSUBR(a, b) XSETPNTR(a, (int) (b))
412 #define XSETSTRING(a, b) XSETPNTR(a, (int) (b))
413 #define XSETSYMBOL(a, b) XSETPNTR(a, (int) (b))
414 #define XSETFUNCTION(a, b) XSETPNTR(a, (int) (b))
415 #define XSETMARKER(a, b) XSETPNTR(a, (int) (b))
416 #define XSETOBJFWD(a, b) XSETPNTR(a, (int) (b))
417 #define XSETINTPTR(a, b) XSETPNTR(a, (int) (b))
418 #define XSETWINDOW(a, b) XSETPNTR(a, (int) (b))
419 #define XSETPROCESS(a, b) XSETPNTR(a, (int) (b))
420 #define XSETFLOAT(a, b) XSETPNTR(a, (int) (b))
422 /* In a cons, the markbit of the car is the gc mark bit */
424 struct Lisp_Cons
426 Lisp_Object car, cdr;
429 /* Like a cons, but records info on where the text lives that it was read from */
430 /* This is not really in use now */
432 struct Lisp_Buffer_Cons
434 Lisp_Object car, cdr;
435 struct buffer *buffer;
436 int bufpos;
439 /* In a string or vector, the sign bit of the `size' is the gc mark bit */
441 struct Lisp_String
443 int size;
444 unsigned char data[1];
447 struct Lisp_Vector
449 int size;
450 struct Lisp_Vector *next;
451 Lisp_Object contents[1];
454 /* In a symbol, the markbit of the plist is used as the gc mark bit */
456 struct Lisp_Symbol
458 struct Lisp_String *name;
459 Lisp_Object value;
460 Lisp_Object function;
461 Lisp_Object plist;
462 struct Lisp_Symbol *next; /* -> next symbol in this obarray bucket */
465 struct Lisp_Subr
467 Lisp_Object (*function) ();
468 short min_args, max_args;
469 char *symbol_name;
470 char *prompt;
471 char *doc;
474 /* In a marker, the markbit of the chain field is used as the gc mark bit */
476 struct Lisp_Marker
478 struct buffer *buffer;
479 Lisp_Object chain;
480 int bufpos;
481 int modified;
484 #ifdef LISP_FLOAT_TYPE
485 /* Optional Lisp floating point type */
486 struct Lisp_Float
488 Lisp_Object type; /* essentially used for mark-bit
489 and chaining when on free-list */
490 double data;
492 #endif /* LISP_FLOAT_TYPE */
494 /* A character, declared with the following typedef, is a member
495 of some character set associated with the current buffer. */
496 typedef unsigned char UCHAR;
498 /* Meanings of slots in a Lisp_Compiled: */
500 #define COMPILED_ARGLIST 0
501 #define COMPILED_BYTECODE 1
502 #define COMPILED_CONSTANTS 2
503 #define COMPILED_STACK_DEPTH 3
504 #define COMPILED_DOC_STRING 4
505 #define COMPILED_INTERACTIVE 5
507 /* Data type checking */
509 #ifdef NULL
510 #undef NULL
511 #endif
512 #define NILP(x) (XFASTINT (x) == XFASTINT (Qnil))
514 /* #define LISTP(x) (XTYPE ((x)) == Lisp_Cons)*/
515 #define CONSP(x) (XTYPE ((x)) == Lisp_Cons)
516 #define EQ(x, y) (XFASTINT (x) == XFASTINT (y))
518 #define CHECK_LIST(x, i) \
519 { if ((XTYPE ((x)) != Lisp_Cons) && !NILP (x)) x = wrong_type_argument (Qlistp, (x)); }
521 #define CHECK_STRING(x, i) \
522 { if (XTYPE ((x)) != Lisp_String) x = wrong_type_argument (Qstringp, (x)); }
524 #define CHECK_CONS(x, i) \
525 { if (XTYPE ((x)) != Lisp_Cons) x = wrong_type_argument (Qconsp, (x)); }
527 #define CHECK_SYMBOL(x, i) \
528 { if (XTYPE ((x)) != Lisp_Symbol) x = wrong_type_argument (Qsymbolp, (x)); }
530 #define CHECK_VECTOR(x, i) \
531 { if (XTYPE ((x)) != Lisp_Vector) x = wrong_type_argument (Qvectorp, (x)); }
533 #define CHECK_BUFFER(x, i) \
534 { if (XTYPE ((x)) != Lisp_Buffer) x = wrong_type_argument (Qbufferp, (x)); }
536 #define CHECK_WINDOW(x, i) \
537 { if (XTYPE ((x)) != Lisp_Window) x = wrong_type_argument (Qwindowp, (x)); }
539 #define CHECK_PROCESS(x, i) \
540 { if (XTYPE ((x)) != Lisp_Process) x = wrong_type_argument (Qprocessp, (x)); }
542 #define CHECK_NUMBER(x, i) \
543 { if (XTYPE ((x)) != Lisp_Int) x = wrong_type_argument (Qintegerp, (x)); }
545 #define CHECK_NATNUM(x, i) \
546 { if (XTYPE ((x)) != Lisp_Int || XINT ((x)) < 0) \
547 x = wrong_type_argument (Qnatnump, (x)); }
549 #define CHECK_MARKER(x, i) \
550 { if (XTYPE ((x)) != Lisp_Marker) x = wrong_type_argument (Qmarkerp, (x)); }
552 #define CHECK_NUMBER_COERCE_MARKER(x, i) \
553 { if (XTYPE ((x)) == Lisp_Marker) XFASTINT (x) = marker_position (x); \
554 else if (XTYPE ((x)) != Lisp_Int) x = wrong_type_argument (Qinteger_or_marker_p, (x)); }
556 #ifdef LISP_FLOAT_TYPE
558 #ifndef DBL_DIG
559 #define DBL_DIG 20
560 #endif
562 #define XFLOATINT(n) extract_float((n))
564 #define CHECK_FLOAT(x, i) \
565 { if (XTYPE (x) != Lisp_Float) \
566 x = wrong_type_argument (Qfloatp, (x)); }
568 #define CHECK_NUMBER_OR_FLOAT(x, i) \
569 { if (XTYPE (x) != Lisp_Float && XTYPE (x) != Lisp_Int) \
570 x = wrong_type_argument (Qinteger_or_floatp, (x)); }
572 #define CHECK_NUMBER_OR_FLOAT_COERCE_MARKER(x, i) \
573 { if (XTYPE (x) == Lisp_Marker) XFASTINT (x) = marker_position (x); \
574 else if (XTYPE (x) != Lisp_Int && XTYPE (x) != Lisp_Float) \
575 x = wrong_type_argument (Qinteger_or_float_or_marker_p, (x)); }
577 #else /* Not LISP_FLOAT_TYPE */
579 #define CHECK_NUMBER_OR_FLOAT CHECK_NUMBER
581 #define CHECK_NUMBER_OR_FLOAT_COERCE_MARKER CHECK_NUMBER_COERCE_MARKER
583 #define XFLOATINT(n) XINT((n))
584 #endif /* LISP_FLOAT_TYPE */
586 /* Cast pointers to this type to compare them. Some machines want int. */
587 #ifndef PNTR_COMPARISON_TYPE
588 #define PNTR_COMPARISON_TYPE unsigned int
589 #endif
591 /* Define a built-in function for calling from Lisp.
592 `lname' should be the name to give the function in Lisp,
593 as a null-terminated C string.
594 `fnname' should be the name of the function in C.
595 By convention, it starts with F.
596 `sname' should be the name for the C constant structure
597 that records information on this function for internal use.
598 By convention, it should be the same as `fnname' but with S instead of F.
599 It's too bad that C macros can't compute this from `fnname'.
600 `minargs' should be a number, the minimum number of arguments allowed.
601 `maxargs' should be a number, the maximum number of arguments allowed,
602 or else MANY or UNEVALLED.
603 MANY means pass a vector of evaluated arguments,
604 in the form of an integer number-of-arguments
605 followed by the address of a vector of Lisp_Objects
606 which contains the argument values.
607 UNEVALLED means pass the list of unevaluated arguments
608 `prompt' says how to read arguments for an interactive call.
609 This can be zero or a C string.
610 Zero means that interactive calls are not allowed.
611 A string is interpreted in a hairy way:
612 it should contain one line for each argument to be read, terminated by \n.
613 The first character of the line controls the type of parsing:
614 s -- read a string.
615 S -- read a symbol.
616 k -- read a key sequence and return it as a string.
617 a -- read a function name (symbol) with completion.
618 C -- read a command name (symbol) with completion.
619 v -- read a variable name (symbol) with completion.
620 b -- read a buffer name (a string) with completion.
621 B -- buffer name, may be existing buffer or may not be.
622 f -- read a file name, file must exist.
623 F -- read a file name, file need not exist.
624 n -- read a number.
625 c -- read a character and return it as a number.
626 p -- use the numeric value of the prefix argument.
627 P -- use raw value of prefix - can be nil, -, (NUMBER) or NUMBER.
628 x -- read a Lisp object from the minibuffer.
629 X -- read a Lisp form from the minibuffer and use its value.
630 A null string means call interactively with no arguments.
631 `doc' is documentation for the user.
634 #define DEFUN(lname, fnname, sname, minargs, maxargs, prompt, doc) \
635 Lisp_Object fnname (); \
636 struct Lisp_Subr sname = {fnname, minargs, maxargs, lname, prompt, 0}; \
637 Lisp_Object fnname
639 /* defsubr (Sname);
640 is how we define the symbol for function `name' at start-up time. */
641 extern void defsubr ();
643 #define MANY -2
644 #define UNEVALLED -1
646 extern void defvar_lisp ();
647 extern void defvar_bool ();
648 extern void defvar_int ();
650 /* Macros we use to define forwarded Lisp variables.
651 These are used in the syms_of_FILENAME functions. */
653 #define DEFVARLISP(lname, vname, doc) defvar_lisp (lname, vname)
654 #define DEFVARBOOL(lname, vname, doc) defvar_bool (lname, vname)
655 #define DEFVARINT(lname, vname, doc) defvar_int (lname, vname)
656 #define DEFVARPERBUFFER(lname, vname, doc) \
657 defvar_per_buffer (lname, vname)
659 #define DEFVAR_LISP(lname, vname, doc) defvar_lisp (lname, vname)
660 #define DEFVAR_LISP_NOPRO(lname, vname, doc) defvar_lisp_nopro (lname, vname)
661 #define DEFVAR_BOOL(lname, vname, doc) defvar_bool (lname, vname)
662 #define DEFVAR_INT(lname, vname, doc) defvar_int (lname, vname)
663 #define DEFVAR_PER_BUFFER(lname, vname, doc) \
664 defvar_per_buffer (lname, vname)
666 /* Structure for recording Lisp call stack for backtrace purposes */
668 struct specbinding
670 Lisp_Object symbol, old_value;
671 Lisp_Object (*func) ();
672 Lisp_Object unused; /* Dividing by 16 is faster than by 12 */
675 extern struct specbinding *specpdl;
676 extern struct specbinding *specpdl_ptr;
677 extern int specpdl_size;
679 struct handler
681 Lisp_Object handler;
682 Lisp_Object var;
683 int poll_suppress_count; /* No error should exit a piece of code
684 in which polling is suppressed. */
685 struct catchtag *tag;
686 struct handler *next;
689 extern struct handler *handlerlist;
691 extern struct catchtag *catchlist;
692 extern struct backtrace *backtrace_list;
694 /* An address near the bottom of the stack.
695 Tells GC how to save a copy of the stack. */
696 extern char *stack_bottom;
698 /* Check quit-flag and quit if it is non-nil. */
700 #define QUIT \
701 if (!NILP (Vquit_flag) && NILP (Vinhibit_quit)) \
702 { Vquit_flag = Qnil; Fsignal (Qquit, Qnil); }
704 /* Nonzero if ought to quit now. */
706 #define QUITP (!NILP (Vquit_flag) && NILP (Vinhibit_quit))
708 /* 1 if CH is upper case. */
710 #define UPPERCASEP(CH) \
711 (XSTRING (current_buffer->downcase_table)->data[CH] != (CH))
713 /* 1 if CH is lower case. */
715 #define LOWERCASEP(CH) \
716 (!UPPERCASEP (CH) \
717 && XSTRING (current_buffer->upcase_table)->data[CH] != (CH))
719 /* 1 if CH is neither upper nor lower case. */
721 #define NOCASEP(CH) (XSTRING (current_buffer->upcase_table)->data[CH] == (CH))
723 /* Upcase a character, or make no change if that cannot be done. */
725 #define UPCASE(CH) \
726 (XSTRING (current_buffer->downcase_table)->data[CH] == (CH) \
727 ? UPCASE1 (CH) : (CH))
729 /* Upcase a character known to be not upper case. */
731 #define UPCASE1(CH) (XSTRING (current_buffer->upcase_table)->data[CH])
733 /* Downcase a character, or make no change if that cannot be done. */
735 #define DOWNCASE(CH) (XSTRING (current_buffer->downcase_table)->data[CH])
737 /* Current buffer's map from characters to lower-case characters. */
739 #define DOWNCASE_TABLE XSTRING (current_buffer->downcase_table)->data
741 /* Table mapping each char to the next char with the same lowercase version.
742 This mapping is a no-op only for characters that don't have case. */
743 #define UPCASE_TABLE XSTRING (current_buffer->upcase_table)->data
745 extern Lisp_Object Vascii_downcase_table, Vascii_upcase_table;
747 /* number of bytes of structure consed since last GC */
749 extern int consing_since_gc;
751 /* threshold for doing another gc */
753 extern int gc_cons_threshold;
755 /* Structure for recording stack slots that need marking */
757 /* This is a chain of structures, each of which points at a Lisp_Object variable
758 whose value should be marked in garbage collection.
759 Normally every link of the chain is an automatic variable of a function,
760 and its `val' points to some argument or local variable of the function.
761 On exit to the function, the chain is set back to the value it had on entry.
762 This way, no link remains in the chain when the stack frame containing the link disappears.
764 Every function that can call Feval must protect in this fashion all
765 Lisp_Object variables whose contents will be used again. */
767 extern struct gcpro *gcprolist;
769 struct gcpro
771 struct gcpro *next;
772 Lisp_Object *var; /* Address of first protected variable */
773 int nvars; /* Number of consecutive protected variables */
776 #define GCPRO1(varname) \
777 {gcpro1.next = gcprolist; gcpro1.var = &varname; gcpro1.nvars = 1; \
778 gcprolist = &gcpro1; }
780 #define GCPRO2(varname1, varname2) \
781 {gcpro1.next = gcprolist; gcpro1.var = &varname1; gcpro1.nvars = 1; \
782 gcpro2.next = &gcpro1; gcpro2.var = &varname2; gcpro2.nvars = 1; \
783 gcprolist = &gcpro2; }
785 #define GCPRO3(varname1, varname2, varname3) \
786 {gcpro1.next = gcprolist; gcpro1.var = &varname1; gcpro1.nvars = 1; \
787 gcpro2.next = &gcpro1; gcpro2.var = &varname2; gcpro2.nvars = 1; \
788 gcpro3.next = &gcpro2; gcpro3.var = &varname3; gcpro3.nvars = 1; \
789 gcprolist = &gcpro3; }
791 #define GCPRO4(varname1, varname2, varname3, varname4) \
792 {gcpro1.next = gcprolist; gcpro1.var = &varname1; gcpro1.nvars = 1; \
793 gcpro2.next = &gcpro1; gcpro2.var = &varname2; gcpro2.nvars = 1; \
794 gcpro3.next = &gcpro2; gcpro3.var = &varname3; gcpro3.nvars = 1; \
795 gcpro4.next = &gcpro3; gcpro4.var = &varname4; gcpro4.nvars = 1; \
796 gcprolist = &gcpro4; }
798 /* Call staticpro (&var) to protect static variable `var'. */
800 void staticpro();
802 #define UNGCPRO (gcprolist = gcpro1.next)
804 /* Evaluate expr, UNGCPRO, and then return the value of expr. */
805 #define RETURN_UNGCPRO(expr) \
806 do \
808 Lisp_Object ret_ungc_val; \
809 ret_ungc_val = (expr); \
810 UNGCPRO; \
811 return ret_ungc_val; \
813 while (0)
815 /* Defined in data.c */
816 extern Lisp_Object Qnil, Qt, Qquote, Qlambda, Qsubr, Qunbound;
817 extern Lisp_Object Qerror_conditions, Qerror_message, Qtop_level;
818 extern Lisp_Object Qerror, Qquit, Qwrong_type_argument, Qargs_out_of_range;
819 extern Lisp_Object Qvoid_variable, Qvoid_function;
820 extern Lisp_Object Qsetting_constant, Qinvalid_read_syntax;
821 extern Lisp_Object Qinvalid_function, Qwrong_number_of_arguments, Qno_catch;
822 extern Lisp_Object Qend_of_file, Qarith_error;
823 extern Lisp_Object Qbeginning_of_buffer, Qend_of_buffer, Qbuffer_read_only;
825 extern Lisp_Object Qintegerp, Qnatnump, Qsymbolp, Qlistp, Qconsp;
826 extern Lisp_Object Qstringp, Qarrayp, Qsequencep, Qbufferp;
827 extern Lisp_Object Qchar_or_string_p, Qmarkerp, Qvectorp;
828 extern Lisp_Object Qinteger_or_marker_p, Qboundp, Qfboundp;
829 extern Lisp_Object Qcdr;
831 #ifdef LISP_FLOAT_TYPE
832 extern Lisp_Object Qfloatp, Qinteger_or_floatp, Qinteger_or_float_or_marker_p;
833 #endif /* LISP_FLOAT_TYPE */
835 extern Lisp_Object Qscreenp;
837 extern Lisp_Object Feq (), Fnull (), Flistp (), Fconsp (), Fatom (), Fnlistp ();
838 extern Lisp_Object Fintegerp (), Fnatnump (), Fsymbolp ();
839 extern Lisp_Object Fvectorp (), Fstringp (), Farrayp (), Fsequencep ();
840 extern Lisp_Object Fbufferp (), Fmarkerp (), Fsubrp (), Fchar_or_string_p ();
841 extern Lisp_Object Finteger_or_marker_p ();
842 #ifdef LISP_FLOAT_TYPE
843 extern Lisp_Object Ffloatp(), Finteger_or_floatp();
844 extern Lisp_Object Finteger_or_float_or_marker_p(), Ftruncate();
845 #endif /* LISP_FLOAT_TYPE */
847 extern Lisp_Object Fcar (), Fcar_safe(), Fcdr (), Fcdr_safe();
848 extern Lisp_Object Fsetcar (), Fsetcdr ();
849 extern Lisp_Object Fboundp (), Ffboundp (), Fmakunbound (), Ffmakunbound ();
850 extern Lisp_Object Fsymbol_function (), Fsymbol_plist (), Fsymbol_name ();
851 extern Lisp_Object Ffset (), Fsetplist ();
852 extern Lisp_Object Fsymbol_value (), find_symbol_value (), Fset ();
853 extern Lisp_Object Fdefault_value (), Fset_default ();
855 extern Lisp_Object Faref (), Faset (), Farray_length ();
857 extern Lisp_Object Fstring_to_int (), Fint_to_string ();
858 extern Lisp_Object Feqlsign (), Fgtr (), Flss (), Fgeq (), Fleq (), Fneq (), Fzerop ();
859 extern Lisp_Object Fplus (), Fminus (), Ftimes (), Fquo (), Frem (), Fmax (), Fmin ();
860 extern Lisp_Object Flogand (), Flogior (), Flogxor (), Flognot (), Flsh (), Fash ();
861 extern Lisp_Object Fadd1 (), Fsub1 ();
863 extern Lisp_Object make_number ();
864 extern void args_out_of_range ();
865 extern void args_out_of_range_3 ();
866 extern Lisp_Object wrong_type_argument ();
867 #ifdef LISP_FLOAT_TYPE
868 extern Lisp_Object Ffloat_to_int(), Fint_to_float();
869 extern double extract_float();
870 #endif /* LISP_FLOAT_TYPE */
872 /* Defined in fns.c */
873 extern Lisp_Object Qstring_lessp;
874 extern Lisp_Object Vfeatures;
875 extern Lisp_Object Fidentity (), Frandom ();
876 extern Lisp_Object Flength ();
877 extern Lisp_Object Fappend (), Fconcat (), Fvconcat (), Fcopy_sequence ();
878 extern Lisp_Object Fsubstring ();
879 extern Lisp_Object Fnthcdr (), Fmemq (), Fassq (), Fassoc ();
880 extern Lisp_Object Frassq (), Fdelq (), Fsort ();
881 extern Lisp_Object Freverse (), Fnreverse (), Fget (), Fput (), Fequal ();
882 extern Lisp_Object Ffillarray (), Fnconc (), Fmapcar (), Fmapconcat ();
883 extern Lisp_Object Fy_or_n_p (), do_yes_or_no_p ();
884 extern Lisp_Object Ffeaturep (), Frequire () , Fprovide ();
885 extern Lisp_Object concat2 (), nconc2 ();
886 extern Lisp_Object assq_no_quit ();
888 /* Defined in alloc.c */
889 extern Lisp_Object Vpurify_flag;
890 extern Lisp_Object Fcons (), Flist(), Fmake_list ();
891 extern Lisp_Object Fmake_vector (), Fvector (), Fmake_symbol (), Fmake_marker ();
892 extern Lisp_Object Fmake_string (), build_string (), make_string ();
893 extern Lisp_Object make_array (), make_uninit_string ();
894 extern Lisp_Object Fpurecopy (), make_pure_string ();
895 extern Lisp_Object pure_cons (), make_pure_vector ();
896 extern Lisp_Object Fgarbage_collect ();
898 /* Defined in print.c */
899 extern Lisp_Object Vprin1_to_string_buffer;
900 extern Lisp_Object Fprin1 (), Fprin1_to_string (), Fprinc ();
901 extern Lisp_Object Fterpri (), Fprint ();
902 extern Lisp_Object Vstandard_output, Qstandard_output;
903 extern Lisp_Object Qexternal_debugging_output;
904 extern void temp_output_buffer_setup (), temp_output_buffer_show ();
905 extern int print_level, print_escape_newlines;
906 extern Lisp_Object Qprint_escape_newlines;
908 /* Defined in lread.c */
909 extern Lisp_Object Qvariable_documentation, Qstandard_input;
910 extern Lisp_Object Vobarray, Vstandard_input;
911 extern Lisp_Object Fread (), Fread_from_string ();
912 extern Lisp_Object Fintern (), Fintern_soft (), Fload ();
913 extern Lisp_Object Fget_file_char (), Fread_char ();
914 extern Lisp_Object Feval_current_buffer (), Feval_region ();
915 extern Lisp_Object intern (), oblookup ();
917 /* Defined in eval.c */
918 extern Lisp_Object Qautoload, Qexit, Qinteractive, Qcommandp, Qdefun, Qmacro;
919 extern Lisp_Object Vinhibit_quit, Qinhibit_quit, Vquit_flag;
920 extern Lisp_Object Vmocklisp_arguments, Qmocklisp, Qmocklisp_arguments;
921 extern Lisp_Object Vautoload_queue;
922 extern Lisp_Object Vrun_hooks;
923 extern Lisp_Object Fand (), For (), Fif (), Fprogn (), Fprog1 (), Fprog2 ();
924 extern Lisp_Object Fsetq (), Fquote ();
925 extern Lisp_Object Fuser_variable_p (), Finteractive_p ();
926 extern Lisp_Object Fdefun (), Flet (), FletX (), Fwhile ();
927 extern Lisp_Object Fcatch (), Fthrow (), Funwind_protect ();
928 extern Lisp_Object Fcondition_case (), Fsignal ();
929 extern Lisp_Object Ffunction_type (), Fautoload (), Fcommandp ();
930 extern Lisp_Object Feval (), Fapply (), Ffuncall ();
931 extern Lisp_Object Fglobal_set (), Fglobal_value (), Fbacktrace ();
932 extern Lisp_Object apply1 (), call0 (), call1 (), call2 (), call3 ();
933 extern Lisp_Object apply_lambda ();
934 extern Lisp_Object internal_catch ();
935 extern Lisp_Object internal_condition_case ();
936 extern Lisp_Object unbind_to ();
937 extern void error ();
938 extern Lisp_Object un_autoload ();
940 /* Defined in editfns.c */
941 extern Lisp_Object Vprefix_arg, Qminus, Vcurrent_prefix_arg;
942 extern Lisp_Object Fgoto_char ();
943 extern Lisp_Object Fpoint_min_marker (), Fpoint_max_marker ();
944 extern Lisp_Object Fpoint_min (), Fpoint_max ();
945 extern Lisp_Object Fpoint (), Fpoint_marker (), Fmark_marker ();
946 extern Lisp_Object Ffollowing_char (), Fprevious_char (), Fchar_after ();
947 extern Lisp_Object Finsert ();
948 extern Lisp_Object Feolp (), Feobp (), Fbolp (), Fbobp ();
949 extern Lisp_Object Fformat (), format1 ();
950 extern Lisp_Object Fbuffer_substring (), Fbuffer_string ();
951 extern Lisp_Object Fstring_equal (), Fstring_lessp (), Fbuffer_substring_lessp ();
952 extern Lisp_Object save_excursion_save (), save_restriction_save ();
953 extern Lisp_Object save_excursion_restore (), save_restriction_restore ();
954 extern Lisp_Object Fchar_to_string ();
956 /* defined in buffer.c */
957 extern Lisp_Object Vbuffer_alist;
958 extern Lisp_Object Fget_buffer (), Fget_buffer_create (), Fset_buffer ();
959 extern Lisp_Object Fbarf_if_buffer_read_only ();
960 extern Lisp_Object Fcurrent_buffer (), Fswitch_to_buffer (), Fpop_to_buffer ();
961 extern Lisp_Object Fother_buffer ();
962 extern struct buffer *all_buffers;
964 /* defined in marker.c */
966 extern Lisp_Object Fmarker_position (), Fmarker_buffer ();
967 extern Lisp_Object Fcopy_marker ();
969 /* Defined in fileio.c */
971 extern Lisp_Object Qfile_error;
972 extern Lisp_Object Ffile_name_as_directory ();
973 extern Lisp_Object Fexpand_file_name (), Ffile_name_nondirectory ();
974 extern Lisp_Object Fsubstitute_in_file_name ();
975 extern Lisp_Object Ffile_symlink_p ();
977 /* Defined in abbrev.c */
979 extern Lisp_Object Vfundamental_mode_abbrev_table;
981 /* defined in search.c */
982 extern Lisp_Object Fstring_match ();
983 extern Lisp_Object Fscan_buffer ();
985 /* defined in minibuf.c */
987 extern Lisp_Object last_minibuf_string;
988 extern Lisp_Object read_minibuf (), Fcompleting_read ();
989 extern Lisp_Object Fread_from_minibuffer ();
990 extern Lisp_Object Fread_variable (), Fread_buffer (), Fread_key_sequence ();
991 extern Lisp_Object Fread_minibuffer (), Feval_minibuffer ();
992 extern Lisp_Object Fread_string (), Fread_file_name ();
993 extern Lisp_Object Fread_no_blanks_input ();
995 /* Defined in callint.c */
997 extern Lisp_Object Vcommand_history;
998 extern Lisp_Object Qcall_interactively;
999 extern Lisp_Object Fcall_interactively ();
1000 extern Lisp_Object Fprefix_numeric_value ();
1002 /* defined in casefiddle.c */
1004 extern Lisp_Object Fdowncase (), Fupcase (), Fcapitalize ();
1006 /* defined in keyboard.c */
1008 extern Lisp_Object Qdisabled;
1009 extern Lisp_Object Vhelp_form, Vtop_level;
1010 extern Lisp_Object Fdiscard_input (), Frecursive_edit ();
1011 extern Lisp_Object Fcommand_execute (), Finput_pending_p ();
1013 /* defined in keymap.c */
1015 extern Lisp_Object Qkeymap;
1016 extern Lisp_Object current_global_map;
1017 extern Lisp_Object Fkey_description (), Fsingle_key_description ();
1018 extern Lisp_Object Fwhere_is_internal ();
1019 extern Lisp_Object access_keymap (), store_in_keymap ();
1020 extern Lisp_Object get_keyelt (), get_keymap();
1022 /* defined in indent.c */
1023 extern Lisp_Object Fvertical_motion (), Findent_to (), Fcurrent_column ();
1025 /* defined in window.c */
1026 extern Lisp_Object Qwindowp;
1027 extern Lisp_Object Fget_buffer_window ();
1028 extern Lisp_Object Fsave_window_excursion ();
1029 extern Lisp_Object Fset_window_configuration (), Fcurrent_window_configuration ();
1030 extern Lisp_Object Fcoordinates_in_window_p ();
1031 extern Lisp_Object Fwindow_at ();
1033 /* defined in screen.c */
1034 extern Lisp_Object Fscreenp ();
1035 extern Lisp_Object Fselect_screen ();
1036 extern Lisp_Object Ffocus_screen ();
1037 extern Lisp_Object Funfocus_screen ();
1038 extern Lisp_Object Fselected_screen ();
1039 extern Lisp_Object Fwindow_screen ();
1040 extern Lisp_Object Fscreen_root_window ();
1041 extern Lisp_Object Fscreen_selected_window ();
1042 extern Lisp_Object Fscreen_list ();
1043 extern Lisp_Object Fnext_screen ();
1044 extern Lisp_Object Fdelete_screen ();
1045 extern Lisp_Object Fread_mouse_position ();
1046 extern Lisp_Object Fset_mouse_position ();
1047 extern Lisp_Object Fmake_screen_visible ();
1048 extern Lisp_Object Fmake_screen_invisible ();
1049 extern Lisp_Object Ficonify_screen ();
1050 extern Lisp_Object Fdeiconify_screen ();
1051 extern Lisp_Object Fscreen_visible_p ();
1052 extern Lisp_Object Fvisible_screen_list ();
1053 extern Lisp_Object Fscreen_parameters ();
1054 extern Lisp_Object Fmodify_screen_parameters ();
1055 extern Lisp_Object Fscreen_pixel_size ();
1056 extern Lisp_Object Fscreen_height ();
1057 extern Lisp_Object Fscreen_width ();
1058 extern Lisp_Object Fset_screen_height ();
1059 extern Lisp_Object Fset_screen_width ();
1060 extern Lisp_Object Fset_screen_size ();
1061 extern Lisp_Object Fset_screen_position ();
1062 #ifndef HAVE_X11
1063 extern Lisp_Object Frubber_band_rectangle ();
1064 #endif /* HAVE_X11 */
1066 /* defined in emacs.c */
1067 extern Lisp_Object decode_env_path ();
1068 /* Nonzero means don't do interactive redisplay and don't change tty modes */
1069 extern int noninteractive;
1070 /* Nonzero means don't do use window-system-specific display code */
1071 extern int inhibit_window_system;
1073 /* defined in process.c */
1074 extern Lisp_Object Fget_process (), Fget_buffer_process (), Fprocessp ();
1075 extern Lisp_Object Fprocess_status (), Fkill_process ();
1077 /* defined in callproc.c */
1078 extern Lisp_Object Vexec_path, Vexec_directory, Vdata_directory;
1080 /* defined in doc.c */
1081 extern Lisp_Object Vdoc_file_name;
1082 extern Lisp_Object Fsubstitute_command_keys ();
1083 extern Lisp_Object Fdocumentation (), Fdocumentation_property ();
1085 /* defined in bytecode.c */
1086 extern Lisp_Object Qbytecode;
1088 /* defined in macros.c */
1089 extern Lisp_Object Qexecute_kbd_macro;
1090 extern Lisp_Object Fexecute_kbd_macro ();
1092 /* Nonzero means Emacs has already been initialized.
1093 Used during startup to detect startup of dumped Emacs. */
1094 extern int initialized;
1096 extern int immediate_quit; /* Nonzero means ^G can quit instantly */
1098 extern void debugger ();
1100 extern char *malloc (), *realloc (), *getenv (), *ctime (), *getwd ();
1101 extern long *xmalloc (), *xrealloc ();
1103 extern char *egetenv ();