1 /* Fundamental definitions for GNU Emacs Lisp interpreter.
2 Copyright (C) 1985, 1986, 1987, 1992 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 2, or (at your option)
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 */
27 /* Integer. XINT(obj) is the integer value. */
30 /* Symbol. XSYMBOL (object) points to a struct Lisp_Symbol. */
33 /* Marker (buffer ptr). XMARKER(object) points to a struct Lisp_Marker. */
36 /* String. XSTRING (object) points to a struct Lisp_String.
37 The length of the string, and its contents, are stored therein. */
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. */
44 /* Cons. XCONS (object) points to a struct 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. */
52 /* Editor buffer. XBUFFER(obj) points to a struct 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. */
60 /* Internal value return by subroutines of read.
61 The user never sees this data type.
62 Its value is just a number. */
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. */
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. */
78 /* Object describing a connection to a subprocess.
79 It points to storage of type struct 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
86 XOBJFWD(obj) points to the Lisp_Object variable. */
90 /* Pointer to a vector-like object describing a display frame
91 on which Emacs can display a window hierarchy. We don't define
92 this unless MULTI_FRAME is defined; this helps the compiler catch
93 code that won't work on a non-MULTI_FRAME configuration. */
97 /* Used when a FILE * value needs to be passed
98 in an argument of type Lisp_Object.
99 You must do *(FILE **) XPNTR(obj) to get the value.
100 The user will never see this data type. */
101 Lisp_Internal_Stream
,
103 /* Used in a symbol value cell when the symbol's value is per-buffer.
104 The actual contents are a cons cell which starts a list like this:
105 (REALVALUE BUFFER CURRENT-ALIST-ELEMENT . DEFAULT-VALUE).
107 BUFFER is the last buffer for which this symbol's value was
110 CURRENT-ALIST-ELEMENT is a pointer to an element of BUFFER's
111 local_var_alist, that being the element whose car is this
112 variable. Or it can be a pointer to the
113 (CURRENT-ALIST-ELEMENT . DEFAULT-VALUE),
114 if BUFFER does not have an element in its alist for this
115 variable (that is, if BUFFER sees the default value of this
118 If we want to examine or set the value and BUFFER is current,
119 we just examine or set REALVALUE. If BUFFER is not current, we
120 store the current REALVALUE value into CURRENT-ALIST-ELEMENT,
121 then find the appropriate alist element for the buffer now
122 current and set up CURRENT-ALIST-ELEMENT. Then we set
123 REALVALUE out of that element, and store into BUFFER.
125 If we are setting the variable and the current buffer does not
126 have an alist entry for this variable, an alist entry is
129 Note that REALVALUE can be a forwarding pointer. Each time it
130 is examined or set, forwarding must be done. Each time we
131 switch buffers, buffer-local variables which forward into C
132 variables are swapped immediately, so the C code can assume
133 that they are always up to date. */
134 Lisp_Buffer_Local_Value
,
136 /* Like Lisp_Buffer_Local_Value with one difference:
137 merely setting the variable while some buffer is current
138 does not cause that buffer to have its own local value of this variable.
139 Only make-local-variable does that. */
140 Lisp_Some_Buffer_Local_Value
,
143 /* Like Lisp_Objfwd except that value lives in a slot
144 in the current buffer. Value is byte index of slot within buffer */
147 /* In symbol value cell, means var is unbound.
148 In symbol function cell, means function name is undefined. */
151 /* Window used for Emacs display.
152 Data inside looks like a Lisp_Vector. */
155 /* Used by save,set,restore-window-configuration */
156 Lisp_Window_Configuration
158 #ifdef LISP_FLOAT_TYPE
161 #endif /* LISP_FLOAT_TYPE */
164 #ifndef NO_UNION_TYPE
168 /* Definition of Lisp_Object for little-endian machines. */
173 /* Used for comparing two Lisp_Objects;
174 also, positive integers can be accessed fast this way. */
184 unsigned int val
: 24;
189 unsigned int val
: 24;
190 enum Lisp_Type type
: 7;
191 /* The markbit is not really part of the value of a Lisp_Object,
192 and is always zero except during garbage collection. */
193 unsigned int markbit
: 1;
198 #else /* If BIG_ENDIAN */
203 /* Used for comparing two Lisp_Objects;
204 also, positive integers can be accessed fast this way. */
215 unsigned int val
: 24;
219 /* The markbit is not really part of the value of a Lisp_Object,
220 and is always zero except during garbage collection. */
221 unsigned int markbit
: 1;
222 enum Lisp_Type type
: 7;
223 unsigned int val
: 24;
228 #endif /* BIG_ENDIAN */
230 #endif /* NO_UNION_TYPE */
233 /* If union type is not wanted, define Lisp_Object as just a number
234 and define the macros below to extract fields by shifting */
238 #define Lisp_Object int
240 /* These values are overridden by the m- file on some machines. */
250 #define VALMASK ((1<<VALBITS) - 1)
252 #define GCTYPEMASK ((1<<GCTYPEBITS) - 1)
253 #define MARKBIT (1 << (VALBITS + GCTYPEBITS))
255 #endif /* NO_UNION_TYPE */
257 /* These macros extract various sorts of values from a Lisp_Object.
258 For example, if tem is a Lisp_Object whose type is Lisp_Cons,
259 XCONS (tem) is the struct Lisp_Cons * pointing to the memory for that cons. */
263 /* One need to override this if there must be high bits set in data space
264 (doing the result of the below & ((1 << (GCTYPE + 1)) - 1) would work
265 on all machines, but would penalise machines which don't need it)
268 #define XTYPE(a) ((enum Lisp_Type) ((a) >> VALBITS))
272 #define XSETTYPE(a, b) ((a) = XUINT (a) | ((int)(b) << VALBITS))
275 /* Use XFASTINT for fast retrieval and storage of integers known
276 to be positive. This takes advantage of the fact that Lisp_Int is 0. */
277 #define XFASTINT(a) (a)
279 /* Extract the value of a Lisp_Object as a signed integer. */
281 #ifndef XINT /* Some machines need to do this differently. */
282 #define XINT(a) (((a) << (INTBITS-VALBITS)) >> (INTBITS-VALBITS))
285 /* Extract the value as an unsigned integer. This is a basis
286 for extracting it as a pointer to a structure in storage. */
289 #define XUINT(a) ((a) & VALMASK)
294 /* In this representation, data is found in two widely separated segments. */
295 extern int pure_size
;
297 (XUINT (a) | (XUINT (a) > pure_size ? DATA_SEG_BITS : PURE_SEG_BITS))
298 #else /* not HAVE_SHM */
300 /* This case is used for the rt-pc.
301 In the diffs I was given, it checked for ptr = 0
302 and did not adjust it in that case.
303 But I don't think that zero should ever be found
304 in a Lisp object whose data type says it points to something. */
305 #define XPNTR(a) (XUINT (a) | DATA_SEG_BITS)
307 #define XPNTR(a) XUINT (a)
309 #endif /* not HAVE_SHM */
310 #endif /* no XPNTR */
313 #define XSETINT(a, b) ((a) = ((a) & ~VALMASK) | ((b) & VALMASK))
317 #define XSETUINT(a, b) XSETINT (a, b)
321 #define XSETPNTR(a, b) XSETINT (a, b)
325 #define XSET(var, type, ptr) \
326 ((var) = ((int)(type) << VALBITS) + ((int) (ptr) & VALMASK))
329 /* During garbage collection, XGCTYPE must be used for extracting types
330 so that the mark bit is ignored. XMARKBIT accesses the markbit.
331 Markbits are used only in particular slots of particular structure types.
332 Other markbits are always zero.
333 Outside of garbage collection, all mark bits are always zero. */
336 #define XGCTYPE(a) ((enum Lisp_Type) (((a) >> VALBITS) & GCTYPEMASK))
339 #if VALBITS + GCTYPEBITS == INTBITS - 1
340 /* Make XMARKBIT faster if mark bit is sign bit. */
342 #define XMARKBIT(a) ((a) < 0)
344 #endif /* markbit is sign bit */
347 #define XMARKBIT(a) ((a) & MARKBIT)
351 #define XSETMARKBIT(a,b) ((a) = ((a) & ~MARKBIT) | ((b) ? MARKBIT : 0))
355 #define XMARK(a) ((a) |= MARKBIT)
359 #define XUNMARK(a) ((a) &= ~MARKBIT)
362 #endif /* NO_UNION_TYPE */
364 #ifndef NO_UNION_TYPE
366 #define XTYPE(a) ((enum Lisp_Type) (a).u.type)
367 #define XSETTYPE(a, b) ((a).u.type = (char) (b))
369 /* Use XFASTINT for fast retrieval and storage of integers known
370 to be positive. This takes advantage of the fact that Lisp_Int is 0. */
371 #define XFASTINT(a) ((a).i)
373 #ifdef EXPLICIT_SIGN_EXTEND
374 /* Make sure we sign-extend; compilers have been known to fail to do so. */
375 #define XINT(a) (((a).i << 8) >> 8)
377 #define XINT(a) ((a).s.val)
378 #endif /* EXPLICIT_SIGN_EXTEND */
380 #define XUINT(a) ((a).u.val)
381 #define XPNTR(a) ((a).u.val)
382 #define XSETINT(a, b) ((a).s.val = (int) (b))
383 #define XSETUINT(a, b) ((a).s.val = (int) (b))
384 #define XSETPNTR(a, b) ((a).s.val = (int) (b))
386 #define XSET(var, vartype, ptr) \
387 (((var).s.type = ((char) (vartype))), ((var).s.val = ((int) (ptr))))
389 /* During garbage collection, XGCTYPE must be used for extracting types
390 so that the mark bit is ignored. XMARKBIT access the markbit.
391 Markbits are used only in particular slots of particular structure types.
392 Other markbits are always zero.
393 Outside of garbage collection, all mark bits are always zero. */
395 #define XGCTYPE(a) ((a).gu.type)
396 #define XMARKBIT(a) ((a).gu.markbit)
397 #define XSETMARKBIT(a,b) (XMARKBIT(a) = (b))
398 #define XMARK(a) (XMARKBIT(a) = 1)
399 #define XUNMARK(a) (XMARKBIT(a) = 0)
401 #endif /* NO_UNION_TYPE */
404 #define XCONS(a) ((struct Lisp_Cons *) XPNTR(a))
405 #define XBUFFER(a) ((struct buffer *) XPNTR(a))
406 #define XVECTOR(a) ((struct Lisp_Vector *) XPNTR(a))
407 #define XSUBR(a) ((struct Lisp_Subr *) XPNTR(a))
408 #define XSTRING(a) ((struct Lisp_String *) XPNTR(a))
409 #define XSYMBOL(a) ((struct Lisp_Symbol *) XPNTR(a))
410 #define XFUNCTION(a) ((Lisp_Object (*)()) XPNTR(a))
411 #define XMARKER(a) ((struct Lisp_Marker *) XPNTR(a))
412 #define XOBJFWD(a) ((Lisp_Object *) XPNTR(a))
413 #define XINTPTR(a) ((int *) XPNTR(a))
414 #define XWINDOW(a) ((struct window *) XPNTR(a))
415 #define XPROCESS(a) ((struct Lisp_Process *) XPNTR(a))
416 #define XFLOAT(a) ((struct Lisp_Float *) XPNTR(a))
418 #define XSETCONS(a, b) XSETPNTR(a, (int) (b))
419 #define XSETBUFFER(a, b) XSETPNTR(a, (int) (b))
420 #define XSETVECTOR(a, b) XSETPNTR(a, (int) (b))
421 #define XSETSUBR(a, b) XSETPNTR(a, (int) (b))
422 #define XSETSTRING(a, b) XSETPNTR(a, (int) (b))
423 #define XSETSYMBOL(a, b) XSETPNTR(a, (int) (b))
424 #define XSETFUNCTION(a, b) XSETPNTR(a, (int) (b))
425 #define XSETMARKER(a, b) XSETPNTR(a, (int) (b))
426 #define XSETOBJFWD(a, b) XSETPNTR(a, (int) (b))
427 #define XSETINTPTR(a, b) XSETPNTR(a, (int) (b))
428 #define XSETWINDOW(a, b) XSETPNTR(a, (int) (b))
429 #define XSETPROCESS(a, b) XSETPNTR(a, (int) (b))
430 #define XSETFLOAT(a, b) XSETPNTR(a, (int) (b))
432 #ifdef USE_TEXT_PROPERTIES
433 /* Basic data type for use of intervals. See the macros in intervals.h */
437 /* The first group of entries deal with the tree structure. */
439 unsigned int total_length
; /* Length of myself and both children. */
440 unsigned int position
; /* Cache of interval's character position */
441 struct interval
*left
; /* Intervals which precede me. */
442 struct interval
*right
; /* Intervals which succeed me. */
443 struct interval
*parent
; /* Parent in the tree, or the Lisp_Object
444 containing this interval tree. */
446 /* The remaining components are `properties' of the interval.
447 The first four are duplicates for things which can be on the list,
448 for purposes of speed. */
450 unsigned char write_protect
; /* Non-zero means can't modify. */
451 unsigned char visible
; /* Zero means don't display. */
452 unsigned char front_sticky
; /* Non-zero means text inserted just
453 before this interval goes into it. */
454 unsigned char rear_sticky
; /* Likewise for just after it. */
456 Lisp_Object plist
; /* Properties of this interval. */
459 typedef struct interval
*INTERVAL
;
461 /* Complain if object is not string or buffer type */
462 #define CHECK_STRING_OR_BUFFER(x, i) \
463 { if (XTYPE ((x)) != Lisp_String && XTYPE ((x)) != Lisp_Buffer) \
464 x = wrong_type_argument (Qbuffer_or_string_p, (x)); }
466 /* Macro used to conditionally compile intervals into certain data
467 structures. See, e.g., struct Lisp_String below. */
468 #define DECLARE_INTERVALS INTERVAL intervals;
470 /* Macro used to condionally compile interval initialization into
471 certain code. See, e.g., alloc.c. */
472 #define INITIALIZE_INTERVAL(ptr,val) ptr->intervals = val
474 #else /* No text properties */
476 /* If no intervals are used, make the above definitions go away. */
478 #define CHECK_STRING_OR_BUFFER(x, i)
481 #define DECLARE_INTERVALS
482 #define INITIALIZE_INTERVAL(ptr,val)
484 #endif /* USE_TEXT_PROPERTIES */
486 /* In a cons, the markbit of the car is the gc mark bit */
490 Lisp_Object car
, cdr
;
493 /* Like a cons, but records info on where the text lives that it was read from */
494 /* This is not really in use now */
496 struct Lisp_Buffer_Cons
498 Lisp_Object car
, cdr
;
499 struct buffer
*buffer
;
503 /* In a string or vector, the sign bit of the `size' is the gc mark bit */
508 DECLARE_INTERVALS
/* `data' field must be last. */
509 unsigned char data
[1];
515 struct Lisp_Vector
*next
;
516 Lisp_Object contents
[1];
519 /* In a symbol, the markbit of the plist is used as the gc mark bit */
523 struct Lisp_String
*name
;
525 Lisp_Object function
;
527 struct Lisp_Symbol
*next
; /* -> next symbol in this obarray bucket */
532 Lisp_Object (*function
) ();
533 short min_args
, max_args
;
539 /* In a marker, the markbit of the chain field is used as the gc mark bit */
543 struct buffer
*buffer
;
549 #ifdef LISP_FLOAT_TYPE
550 /* Optional Lisp floating point type */
553 Lisp_Object type
; /* essentially used for mark-bit
554 and chaining when on free-list */
557 #endif /* LISP_FLOAT_TYPE */
559 /* A character, declared with the following typedef, is a member
560 of some character set associated with the current buffer. */
561 typedef unsigned char UCHAR
;
563 /* Meanings of slots in a Lisp_Compiled: */
565 #define COMPILED_ARGLIST 0
566 #define COMPILED_BYTECODE 1
567 #define COMPILED_CONSTANTS 2
568 #define COMPILED_STACK_DEPTH 3
569 #define COMPILED_DOC_STRING 4
570 #define COMPILED_INTERACTIVE 5
572 /* Data type checking */
574 #define NILP(x) (XFASTINT (x) == XFASTINT (Qnil))
575 #define GC_NILP(x) GC_EQ (x, Qnil)
577 #ifdef LISP_FLOAT_TYPE
578 #define NUMBERP(x) (XTYPE (x) == Lisp_Int || XTYPE (x) == Lisp_Float)
580 #define NUMBERP(x) (XTYPE (x) == Lisp_Int)
583 /* #define LISTP(x) (XTYPE ((x)) == Lisp_Cons)*/
584 #define CONSP(x) (XTYPE ((x)) == Lisp_Cons)
585 #define EQ(x, y) (XFASTINT (x) == XFASTINT (y))
586 #define GC_EQ(x, y) (XGCTYPE (x) == XGCTYPE (y) && XPNTR (x) == XPNTR (y))
588 #define CHECK_LIST(x, i) \
589 { if ((XTYPE ((x)) != Lisp_Cons) && !NILP (x)) x = wrong_type_argument (Qlistp, (x)); }
591 #define CHECK_STRING(x, i) \
592 { if (XTYPE ((x)) != Lisp_String) x = wrong_type_argument (Qstringp, (x)); }
594 #define CHECK_CONS(x, i) \
595 { if (XTYPE ((x)) != Lisp_Cons) x = wrong_type_argument (Qconsp, (x)); }
597 #define CHECK_SYMBOL(x, i) \
598 { if (XTYPE ((x)) != Lisp_Symbol) x = wrong_type_argument (Qsymbolp, (x)); }
600 #define CHECK_VECTOR(x, i) \
601 { if (XTYPE ((x)) != Lisp_Vector) x = wrong_type_argument (Qvectorp, (x)); }
603 #define CHECK_BUFFER(x, i) \
604 { if (XTYPE ((x)) != Lisp_Buffer) x = wrong_type_argument (Qbufferp, (x)); }
606 #define CHECK_WINDOW(x, i) \
607 { if (XTYPE ((x)) != Lisp_Window) x = wrong_type_argument (Qwindowp, (x)); }
609 /* This macro rejects windows on the interior of the window tree as
610 "dead", which is what we want; this is an argument-checking macro, and
611 the user should never get access to interior windows.
613 A window of any sort, leaf or interior, is dead iff the buffer,
614 vchild, and hchild members are all nil. */
616 #define CHECK_LIVE_WINDOW(x, i) \
618 if (XTYPE ((x)) != Lisp_Window \
619 || NILP (XWINDOW ((x))->buffer)) \
620 x = wrong_type_argument (Qlive_window_p, (x)); \
623 #define CHECK_PROCESS(x, i) \
624 { if (XTYPE ((x)) != Lisp_Process) x = wrong_type_argument (Qprocessp, (x)); }
626 #define CHECK_NUMBER(x, i) \
627 { if (XTYPE ((x)) != Lisp_Int) x = wrong_type_argument (Qintegerp, (x)); }
629 #define CHECK_NATNUM(x, i) \
630 { if (XTYPE ((x)) != Lisp_Int || XINT ((x)) < 0) \
631 x = wrong_type_argument (Qnatnump, (x)); }
633 #define CHECK_MARKER(x, i) \
634 { if (XTYPE ((x)) != Lisp_Marker) x = wrong_type_argument (Qmarkerp, (x)); }
636 #define CHECK_NUMBER_COERCE_MARKER(x, i) \
637 { if (XTYPE ((x)) == Lisp_Marker) XFASTINT (x) = marker_position (x); \
638 else if (XTYPE ((x)) != Lisp_Int) x = wrong_type_argument (Qinteger_or_marker_p, (x)); }
640 #ifdef LISP_FLOAT_TYPE
646 #define XFLOATINT(n) extract_float((n))
648 #define CHECK_FLOAT(x, i) \
649 { if (XTYPE (x) != Lisp_Float) \
650 x = wrong_type_argument (Qfloatp, (x)); }
652 #define CHECK_NUMBER_OR_FLOAT(x, i) \
653 { if (XTYPE (x) != Lisp_Float && XTYPE (x) != Lisp_Int) \
654 x = wrong_type_argument (Qnumberp, (x)); }
656 #define CHECK_NUMBER_OR_FLOAT_COERCE_MARKER(x, i) \
657 { if (XTYPE (x) == Lisp_Marker) XFASTINT (x) = marker_position (x); \
658 else if (XTYPE (x) != Lisp_Int && XTYPE (x) != Lisp_Float) \
659 x = wrong_type_argument (Qnumber_or_marker_p, (x)); }
661 #else /* Not LISP_FLOAT_TYPE */
663 #define CHECK_NUMBER_OR_FLOAT CHECK_NUMBER
665 #define CHECK_NUMBER_OR_FLOAT_COERCE_MARKER CHECK_NUMBER_COERCE_MARKER
667 #define XFLOATINT(n) XINT((n))
668 #endif /* LISP_FLOAT_TYPE */
670 /* Cast pointers to this type to compare them. Some machines want int. */
671 #ifndef PNTR_COMPARISON_TYPE
672 #define PNTR_COMPARISON_TYPE unsigned int
675 /* Define a built-in function for calling from Lisp.
676 `lname' should be the name to give the function in Lisp,
677 as a null-terminated C string.
678 `fnname' should be the name of the function in C.
679 By convention, it starts with F.
680 `sname' should be the name for the C constant structure
681 that records information on this function for internal use.
682 By convention, it should be the same as `fnname' but with S instead of F.
683 It's too bad that C macros can't compute this from `fnname'.
684 `minargs' should be a number, the minimum number of arguments allowed.
685 `maxargs' should be a number, the maximum number of arguments allowed,
686 or else MANY or UNEVALLED.
687 MANY means pass a vector of evaluated arguments,
688 in the form of an integer number-of-arguments
689 followed by the address of a vector of Lisp_Objects
690 which contains the argument values.
691 UNEVALLED means pass the list of unevaluated arguments
692 `prompt' says how to read arguments for an interactive call.
693 This can be zero or a C string.
694 Zero means that interactive calls are not allowed.
695 A string is interpreted in a hairy way:
696 it should contain one line for each argument to be read, terminated by \n.
697 The first character of the line controls the type of parsing:
700 k -- read a key sequence and return it as a string.
701 a -- read a function name (symbol) with completion.
702 C -- read a command name (symbol) with completion.
703 v -- read a variable name (symbol) with completion.
704 b -- read a buffer name (a string) with completion.
705 B -- buffer name, may be existing buffer or may not be.
706 f -- read a file name, file must exist.
707 F -- read a file name, file need not exist.
709 c -- read a character and return it as a number.
710 p -- use the numeric value of the prefix argument.
711 P -- use raw value of prefix - can be nil, -, (NUMBER) or NUMBER.
712 x -- read a Lisp object from the minibuffer.
713 X -- read a Lisp form from the minibuffer and use its value.
714 A null string means call interactively with no arguments.
715 `doc' is documentation for the user.
718 #define DEFUN(lname, fnname, sname, minargs, maxargs, prompt, doc) \
719 Lisp_Object fnname (); \
720 struct Lisp_Subr sname = {fnname, minargs, maxargs, lname, prompt, 0}; \
724 is how we define the symbol for function `name' at start-up time. */
725 extern void defsubr ();
730 extern void defvar_lisp ();
731 extern void defvar_bool ();
732 extern void defvar_int ();
734 /* Macros we use to define forwarded Lisp variables.
735 These are used in the syms_of_FILENAME functions. */
737 #define DEFVAR_LISP(lname, vname, doc) defvar_lisp (lname, vname)
738 #define DEFVAR_LISP_NOPRO(lname, vname, doc) defvar_lisp_nopro (lname, vname)
739 #define DEFVAR_BOOL(lname, vname, doc) defvar_bool (lname, vname)
740 #define DEFVAR_INT(lname, vname, doc) defvar_int (lname, vname)
741 #define DEFVAR_PER_BUFFER(lname, vname, type, doc) \
742 defvar_per_buffer (lname, vname, type, 0)
744 /* Structure for recording Lisp call stack for backtrace purposes. */
746 /* The special binding stack holds the outer values of variables while
747 they are bound by a function application or a let form, stores the
748 code to be executed for Lisp unwind-protect forms, and stores the C
749 functions to be called for record_unwind_protect.
751 If func is non-zero, undoing this binding applies func to old_value;
752 This implements record_unwind_protect.
753 If func is zero and symbol is nil, undoing this binding evaluates
754 the list of forms in old_value; this implements Lisp's unwind-protect
756 Otherwise, undoing this binding stores old_value as symbol's value; this
757 undoes the bindings made by a let form or function call. */
760 Lisp_Object symbol
, old_value
;
761 Lisp_Object (*func
) ();
762 Lisp_Object unused
; /* Dividing by 16 is faster than by 12 */
765 extern struct specbinding
*specpdl
;
766 extern struct specbinding
*specpdl_ptr
;
767 extern int specpdl_size
;
769 /* Everything needed to describe an active condition case. */
772 /* The handler clauses and variable from the condition-case form. */
776 /* Used to effect the longjump out to the handler. */
777 struct catchtag
*tag
;
779 /* The next enclosing handler. */
780 struct handler
*next
;
783 extern struct handler
*handlerlist
;
785 extern struct catchtag
*catchlist
;
786 extern struct backtrace
*backtrace_list
;
788 /* An address near the bottom of the stack.
789 Tells GC how to save a copy of the stack. */
790 extern char *stack_bottom
;
792 /* Check quit-flag and quit if it is non-nil. */
795 if (!NILP (Vquit_flag) && NILP (Vinhibit_quit)) \
796 { Vquit_flag = Qnil; Fsignal (Qquit, Qnil); }
798 /* Nonzero if ought to quit now. */
800 #define QUITP (!NILP (Vquit_flag) && NILP (Vinhibit_quit))
802 /* 1 if CH is upper case. */
804 #define UPPERCASEP(CH) \
805 (XSTRING (current_buffer->downcase_table)->data[CH] != (CH))
807 /* 1 if CH is lower case. */
809 #define LOWERCASEP(CH) \
811 && XSTRING (current_buffer->upcase_table)->data[CH] != (CH))
813 /* 1 if CH is neither upper nor lower case. */
815 #define NOCASEP(CH) (XSTRING (current_buffer->upcase_table)->data[CH] == (CH))
817 /* Upcase a character, or make no change if that cannot be done. */
820 (XSTRING (current_buffer->downcase_table)->data[CH] == (CH) \
821 ? UPCASE1 (CH) : (CH))
823 /* Upcase a character known to be not upper case. */
825 #define UPCASE1(CH) (XSTRING (current_buffer->upcase_table)->data[CH])
827 /* Downcase a character, or make no change if that cannot be done. */
829 #define DOWNCASE(CH) (XSTRING (current_buffer->downcase_table)->data[CH])
831 /* Current buffer's map from characters to lower-case characters. */
833 #define DOWNCASE_TABLE XSTRING (current_buffer->downcase_table)->data
835 /* Table mapping each char to the next char with the same lowercase version.
836 This mapping is a no-op only for characters that don't have case. */
837 #define UPCASE_TABLE XSTRING (current_buffer->upcase_table)->data
839 extern Lisp_Object Vascii_downcase_table
, Vascii_upcase_table
;
841 /* number of bytes of structure consed since last GC */
843 extern int consing_since_gc
;
845 /* threshold for doing another gc */
847 extern int gc_cons_threshold
;
849 /* Structure for recording stack slots that need marking */
851 /* This is a chain of structures, each of which points at a Lisp_Object variable
852 whose value should be marked in garbage collection.
853 Normally every link of the chain is an automatic variable of a function,
854 and its `val' points to some argument or local variable of the function.
855 On exit to the function, the chain is set back to the value it had on entry.
856 This way, no link remains in the chain when the stack frame containing the link disappears.
858 Every function that can call Feval must protect in this fashion all
859 Lisp_Object variables whose contents will be used again. */
861 extern struct gcpro
*gcprolist
;
866 Lisp_Object
*var
; /* Address of first protected variable */
867 int nvars
; /* Number of consecutive protected variables */
870 #define GCPRO1(varname) \
871 {gcpro1.next = gcprolist; gcpro1.var = &varname; gcpro1.nvars = 1; \
872 gcprolist = &gcpro1; }
874 #define GCPRO2(varname1, varname2) \
875 {gcpro1.next = gcprolist; gcpro1.var = &varname1; gcpro1.nvars = 1; \
876 gcpro2.next = &gcpro1; gcpro2.var = &varname2; gcpro2.nvars = 1; \
877 gcprolist = &gcpro2; }
879 #define GCPRO3(varname1, varname2, varname3) \
880 {gcpro1.next = gcprolist; gcpro1.var = &varname1; gcpro1.nvars = 1; \
881 gcpro2.next = &gcpro1; gcpro2.var = &varname2; gcpro2.nvars = 1; \
882 gcpro3.next = &gcpro2; gcpro3.var = &varname3; gcpro3.nvars = 1; \
883 gcprolist = &gcpro3; }
885 #define GCPRO4(varname1, varname2, varname3, varname4) \
886 {gcpro1.next = gcprolist; gcpro1.var = &varname1; gcpro1.nvars = 1; \
887 gcpro2.next = &gcpro1; gcpro2.var = &varname2; gcpro2.nvars = 1; \
888 gcpro3.next = &gcpro2; gcpro3.var = &varname3; gcpro3.nvars = 1; \
889 gcpro4.next = &gcpro3; gcpro4.var = &varname4; gcpro4.nvars = 1; \
890 gcprolist = &gcpro4; }
892 /* Call staticpro (&var) to protect static variable `var'. */
896 #define UNGCPRO (gcprolist = gcpro1.next)
898 /* Evaluate expr, UNGCPRO, and then return the value of expr. I used
899 to have a `do ... while' clause around this to make it interact
900 with semicolons correctly, but this makes some compilers complain
901 that the while is never reached. */
902 #define RETURN_UNGCPRO(expr) \
904 Lisp_Object ret_ungc_val; \
905 ret_ungc_val = (expr); \
907 return ret_ungc_val; \
910 /* Defined in data.c */
911 extern Lisp_Object Qnil
, Qt
, Qquote
, Qlambda
, Qsubr
, Qunbound
;
912 extern Lisp_Object Qerror_conditions
, Qerror_message
, Qtop_level
;
913 extern Lisp_Object Qerror
, Qquit
, Qwrong_type_argument
, Qargs_out_of_range
;
914 extern Lisp_Object Qvoid_variable
, Qvoid_function
;
915 extern Lisp_Object Qsetting_constant
, Qinvalid_read_syntax
;
916 extern Lisp_Object Qinvalid_function
, Qwrong_number_of_arguments
, Qno_catch
;
917 extern Lisp_Object Qend_of_file
, Qarith_error
;
918 extern Lisp_Object Qbeginning_of_buffer
, Qend_of_buffer
, Qbuffer_read_only
;
920 extern Lisp_Object Qintegerp
, Qnumberp
, Qnatnump
, Qsymbolp
, Qlistp
, Qconsp
;
921 extern Lisp_Object Qstringp
, Qarrayp
, Qsequencep
, Qbufferp
;
922 extern Lisp_Object Qchar_or_string_p
, Qmarkerp
, Qvectorp
;
923 extern Lisp_Object Qinteger_or_marker_p
, Qnumber_or_marker_p
;
924 extern Lisp_Object Qboundp
, Qfboundp
;
925 extern Lisp_Object Qbuffer_or_string_p
;
926 extern Lisp_Object Qcdr
;
928 #ifdef LISP_FLOAT_TYPE
929 extern Lisp_Object Qfloatp
, Qinteger_or_floatp
, Qinteger_or_float_or_marker_p
;
930 #endif /* LISP_FLOAT_TYPE */
932 extern Lisp_Object Qframep
;
934 extern Lisp_Object
Feq (), Fnull (), Flistp (), Fconsp (), Fatom (), Fnlistp ();
935 extern Lisp_Object
Fintegerp (), Fnatnump (), Fsymbolp ();
936 extern Lisp_Object
Fvectorp (), Fstringp (), Farrayp (), Fsequencep ();
937 extern Lisp_Object
Fbufferp (), Fmarkerp (), Fsubrp (), Fchar_or_string_p ();
938 extern Lisp_Object
Finteger_or_marker_p ();
939 #ifdef LISP_FLOAT_TYPE
940 extern Lisp_Object
Ffloatp(), Finteger_or_floatp();
941 extern Lisp_Object
Finteger_or_float_or_marker_p(), Ftruncate();
942 #endif /* LISP_FLOAT_TYPE */
944 extern Lisp_Object
Fcar (), Fcar_safe(), Fcdr (), Fcdr_safe();
945 extern Lisp_Object
Fsetcar (), Fsetcdr ();
946 extern Lisp_Object
Fboundp (), Ffboundp (), Fmakunbound (), Ffmakunbound ();
947 extern Lisp_Object
Fsymbol_function (), Fsymbol_plist (), Fsymbol_name ();
948 extern Lisp_Object
indirect_function (), Findirect_function ();
949 extern Lisp_Object
Ffset (), Fsetplist ();
950 extern Lisp_Object
Fsymbol_value (), find_symbol_value (), Fset ();
951 extern Lisp_Object
Fdefault_value (), Fset_default (), Fdefault_boundp ();
953 extern Lisp_Object
Faref (), Faset (), Farray_length ();
955 extern Lisp_Object
Fstring_to_number (), Fint_to_string ();
956 extern Lisp_Object
Feqlsign (), Fgtr (), Flss (), Fgeq (), Fleq ();
957 extern Lisp_Object
Fneq (), Fzerop ();
958 extern Lisp_Object
Fplus (), Fminus (), Ftimes (), Fquo (), Frem ();
959 extern Lisp_Object
Fmax (), Fmin ();
960 extern Lisp_Object
Flogand (), Flogior (), Flogxor (), Flognot ();
961 extern Lisp_Object
Flsh (), Fash ();
963 extern Lisp_Object
Fadd1 (), Fsub1 ();
965 extern Lisp_Object
make_number ();
966 extern void args_out_of_range ();
967 extern void args_out_of_range_3 ();
968 extern Lisp_Object
wrong_type_argument ();
969 #ifdef LISP_FLOAT_TYPE
970 extern Lisp_Object
Ffloat_to_int(), Fint_to_float();
971 extern double extract_float();
972 extern Lisp_Object
make_float ();
973 extern Lisp_Object
Ffloat ();
974 #endif /* LISP_FLOAT_TYPE */
976 /* Defined in fns.c */
977 extern Lisp_Object Qstring_lessp
;
978 extern Lisp_Object Vfeatures
;
979 extern Lisp_Object
Fidentity (), Frandom ();
980 extern Lisp_Object
Flength ();
981 extern Lisp_Object
Fappend (), Fconcat (), Fvconcat (), Fcopy_sequence ();
982 extern Lisp_Object
Fsubstring ();
983 extern Lisp_Object
Fnth (), Fnthcdr (), Fmemq (), Fassq (), Fassoc ();
984 extern Lisp_Object
Frassq (), Fdelq (), Fsort ();
985 extern Lisp_Object
Freverse (), Fnreverse (), Fget (), Fput (), Fequal ();
986 extern Lisp_Object
Ffillarray (), Fnconc (), Fmapcar (), Fmapconcat ();
987 extern Lisp_Object
Fy_or_n_p (), do_yes_or_no_p ();
988 extern Lisp_Object
Ffeaturep (), Frequire () , Fprovide ();
989 extern Lisp_Object
concat2 (), nconc2 ();
990 extern Lisp_Object
assq_no_quit ();
991 extern Lisp_Object
Fcopy_alist ();
993 /* Defined in alloc.c */
994 extern Lisp_Object Vpurify_flag
;
995 extern Lisp_Object
Fcons (), Flist(), Fmake_list ();
996 extern Lisp_Object
Fmake_vector (), Fvector (), Fmake_symbol (), Fmake_marker ();
997 extern Lisp_Object
Fmake_string (), build_string (), make_string ();
998 extern Lisp_Object
make_array (), make_uninit_string ();
999 extern Lisp_Object
Fpurecopy (), make_pure_string ();
1000 extern Lisp_Object
pure_cons (), make_pure_vector ();
1001 extern Lisp_Object
Fgarbage_collect ();
1002 extern Lisp_Object
Fmake_byte_code ();
1004 /* Defined in print.c */
1005 extern Lisp_Object Vprin1_to_string_buffer
;
1006 extern Lisp_Object
Fprin1 (), Fprin1_to_string (), Fprinc ();
1007 extern Lisp_Object
Fterpri (), Fprint ();
1008 extern Lisp_Object Vstandard_output
, Qstandard_output
;
1009 extern Lisp_Object Qexternal_debugging_output
;
1010 extern void temp_output_buffer_setup (), temp_output_buffer_show ();
1011 extern int print_level
, print_escape_newlines
;
1012 extern Lisp_Object Qprint_escape_newlines
;
1014 /* Defined in lread.c */
1015 extern Lisp_Object Qvariable_documentation
, Qstandard_input
;
1016 extern Lisp_Object Vobarray
, Vstandard_input
;
1017 extern Lisp_Object
Fread (), Fread_from_string ();
1018 extern Lisp_Object
Fintern (), Fintern_soft (), Fload ();
1019 extern Lisp_Object
Fget_file_char (), Fread_char ();
1020 extern Lisp_Object
Feval_current_buffer (), Feval_region ();
1021 extern Lisp_Object
intern (), oblookup ();
1023 /* Defined in eval.c */
1024 extern Lisp_Object Qautoload
, Qexit
, Qinteractive
, Qcommandp
, Qdefun
, Qmacro
;
1025 extern Lisp_Object Vinhibit_quit
, Qinhibit_quit
, Vquit_flag
;
1026 extern Lisp_Object Vmocklisp_arguments
, Qmocklisp
, Qmocklisp_arguments
;
1027 extern Lisp_Object Vautoload_queue
;
1028 extern Lisp_Object Vrun_hooks
;
1029 extern Lisp_Object
Fand (), For (), Fif (), Fprogn (), Fprog1 (), Fprog2 ();
1030 extern Lisp_Object
Fsetq (), Fquote ();
1031 extern Lisp_Object
Fuser_variable_p (), Finteractive_p ();
1032 extern Lisp_Object
Fdefun (), Flet (), FletX (), Fwhile ();
1033 extern Lisp_Object
Fcatch (), Fthrow (), Funwind_protect ();
1034 extern Lisp_Object
Fcondition_case (), Fsignal ();
1035 extern Lisp_Object
Ffunction_type (), Fautoload (), Fcommandp ();
1036 extern Lisp_Object
Feval (), Fapply (), Ffuncall ();
1037 extern Lisp_Object
Fglobal_set (), Fglobal_value (), Fbacktrace ();
1038 extern Lisp_Object
apply1 (), call0 (), call1 (), call2 (), call3 ();
1039 extern Lisp_Object
apply_lambda ();
1040 extern Lisp_Object
internal_catch ();
1041 extern Lisp_Object
internal_condition_case ();
1042 extern Lisp_Object
unbind_to ();
1043 extern void error ();
1044 extern Lisp_Object
un_autoload ();
1046 /* Defined in editfns.c */
1047 extern Lisp_Object Vprefix_arg
, Qminus
, Vcurrent_prefix_arg
;
1048 extern Lisp_Object
Fgoto_char ();
1049 extern Lisp_Object
Fpoint_min_marker (), Fpoint_max_marker ();
1050 extern Lisp_Object
Fpoint_min (), Fpoint_max ();
1051 extern Lisp_Object
Fpoint (), Fpoint_marker (), Fmark_marker ();
1052 extern Lisp_Object
Ffollowing_char (), Fprevious_char (), Fchar_after ();
1053 extern Lisp_Object
Finsert ();
1054 extern Lisp_Object
Feolp (), Feobp (), Fbolp (), Fbobp ();
1055 extern Lisp_Object
Fformat (), format1 ();
1056 extern Lisp_Object
make_buffer_string (), Fbuffer_substring ();
1057 extern Lisp_Object
Fbuffer_string ();
1058 extern Lisp_Object
Fstring_equal (), Fstring_lessp (), Fbuffer_substring_lessp ();
1059 extern Lisp_Object
save_excursion_save (), save_restriction_save ();
1060 extern Lisp_Object
save_excursion_restore (), save_restriction_restore ();
1061 extern Lisp_Object
Fchar_to_string ();
1063 /* defined in buffer.c */
1064 extern Lisp_Object Vbuffer_alist
;
1065 extern Lisp_Object
Fget_buffer (), Fget_buffer_create (), Fset_buffer ();
1066 extern Lisp_Object
Fbarf_if_buffer_read_only ();
1067 extern Lisp_Object
Fcurrent_buffer (), Fswitch_to_buffer (), Fpop_to_buffer ();
1068 extern Lisp_Object
Fother_buffer ();
1069 extern struct buffer
*all_buffers
;
1071 /* defined in marker.c */
1073 extern Lisp_Object
Fmarker_position (), Fmarker_buffer ();
1074 extern Lisp_Object
Fcopy_marker ();
1076 /* Defined in fileio.c */
1078 extern Lisp_Object Qfile_error
;
1079 extern Lisp_Object
Ffind_file_name_handler ();
1080 extern Lisp_Object
Ffile_name_as_directory ();
1081 extern Lisp_Object
Fexpand_file_name (), Ffile_name_nondirectory ();
1082 extern Lisp_Object
Fsubstitute_in_file_name ();
1083 extern Lisp_Object
Ffile_symlink_p ();
1084 extern Lisp_Object
Fverify_visited_file_modtime ();
1085 extern Lisp_Object
Ffile_exists_p ();
1086 extern Lisp_Object
Fdirectory_file_name ();
1087 extern Lisp_Object
Ffile_name_directory ();
1088 extern Lisp_Object
expand_and_dir_to_file ();
1089 extern Lisp_Object
Ffile_accessible_directory_p ();
1091 /* Defined in abbrev.c */
1093 extern Lisp_Object Vfundamental_mode_abbrev_table
;
1095 /* defined in search.c */
1096 extern Lisp_Object
Fstring_match ();
1097 extern Lisp_Object
Fscan_buffer ();
1099 /* defined in minibuf.c */
1101 extern Lisp_Object last_minibuf_string
;
1102 extern Lisp_Object
read_minibuf (), Fcompleting_read ();
1103 extern Lisp_Object
Fread_from_minibuffer ();
1104 extern Lisp_Object
Fread_variable (), Fread_buffer (), Fread_key_sequence ();
1105 extern Lisp_Object
Fread_minibuffer (), Feval_minibuffer ();
1106 extern Lisp_Object
Fread_string (), Fread_file_name ();
1107 extern Lisp_Object
Fread_no_blanks_input ();
1109 /* Defined in callint.c */
1111 extern Lisp_Object Vcommand_history
;
1112 extern Lisp_Object Qcall_interactively
;
1113 extern Lisp_Object
Fcall_interactively ();
1114 extern Lisp_Object
Fprefix_numeric_value ();
1116 /* defined in casefiddle.c */
1118 extern Lisp_Object
Fdowncase (), Fupcase (), Fcapitalize ();
1120 /* defined in keyboard.c */
1122 extern Lisp_Object Qdisabled
;
1123 extern Lisp_Object Vhelp_form
, Vtop_level
;
1124 extern Lisp_Object
Fdiscard_input (), Frecursive_edit ();
1125 extern Lisp_Object
Fcommand_execute (), Finput_pending_p ();
1126 extern Lisp_Object Qvertical_scroll_bar
;
1128 /* defined in keymap.c */
1130 extern Lisp_Object Qkeymap
;
1131 extern Lisp_Object current_global_map
;
1132 extern Lisp_Object
Fkey_description (), Fsingle_key_description ();
1133 extern Lisp_Object
Fwhere_is_internal ();
1134 extern Lisp_Object
access_keymap (), store_in_keymap ();
1135 extern Lisp_Object
get_keyelt (), get_keymap();
1137 /* defined in indent.c */
1138 extern Lisp_Object
Fvertical_motion (), Findent_to (), Fcurrent_column ();
1140 /* defined in window.c */
1141 extern Lisp_Object Qwindowp
, Qlive_window_p
;
1142 extern Lisp_Object
Fget_buffer_window ();
1143 extern Lisp_Object
Fsave_window_excursion ();
1144 extern Lisp_Object
Fset_window_configuration (), Fcurrent_window_configuration ();
1145 extern Lisp_Object
Fcoordinates_in_window_p ();
1146 extern Lisp_Object
Fwindow_at ();
1147 extern int window_internal_height (), window_internal_width ();
1149 /* defined in frame.c */
1150 extern Lisp_Object
Fframep ();
1151 extern Lisp_Object
Fselect_frame ();
1152 extern Lisp_Object
Ffocus_frame ();
1153 extern Lisp_Object
Funfocus_frame ();
1154 extern Lisp_Object
Fselected_frame ();
1155 extern Lisp_Object
Fwindow_frame ();
1156 extern Lisp_Object
Fframe_root_window ();
1157 extern Lisp_Object
Fframe_selected_window ();
1158 extern Lisp_Object
Fframe_list ();
1159 extern Lisp_Object
Fnext_frame ();
1160 extern Lisp_Object
Fdelete_frame ();
1161 extern Lisp_Object
Fread_mouse_position ();
1162 extern Lisp_Object
Fset_mouse_position ();
1163 extern Lisp_Object
Fmake_frame_visible ();
1164 extern Lisp_Object
Fmake_frame_invisible ();
1165 extern Lisp_Object
Ficonify_frame ();
1166 extern Lisp_Object
Fdeiconify_frame ();
1167 extern Lisp_Object
Fframe_visible_p ();
1168 extern Lisp_Object
Fvisible_frame_list ();
1169 extern Lisp_Object
Fframe_parameters ();
1170 extern Lisp_Object
Fmodify_frame_parameters ();
1171 extern Lisp_Object
Fframe_pixel_size ();
1172 extern Lisp_Object
Fframe_height ();
1173 extern Lisp_Object
Fframe_width ();
1174 extern Lisp_Object
Fset_frame_height ();
1175 extern Lisp_Object
Fset_frame_width ();
1176 extern Lisp_Object
Fset_frame_size ();
1177 extern Lisp_Object
Fset_frame_position ();
1179 extern Lisp_Object
Frubber_band_rectangle ();
1180 #endif /* HAVE_X11 */
1182 /* defined in emacs.c */
1183 extern Lisp_Object
decode_env_path ();
1184 void shut_down_emacs ( /* int signal */ );
1185 /* Nonzero means don't do interactive redisplay and don't change tty modes */
1186 extern int noninteractive
;
1187 /* Nonzero means don't do use window-system-specific display code */
1188 extern int inhibit_window_system
;
1190 /* defined in process.c */
1191 extern Lisp_Object
Fget_process (), Fget_buffer_process (), Fprocessp ();
1192 extern Lisp_Object
Fprocess_status (), Fkill_process ();
1194 /* defined in callproc.c */
1195 extern Lisp_Object Vexec_path
, Vexec_directory
, Vdata_directory
;
1197 /* defined in doc.c */
1198 extern Lisp_Object Vdoc_file_name
;
1199 extern Lisp_Object
Fsubstitute_command_keys ();
1200 extern Lisp_Object
Fdocumentation (), Fdocumentation_property ();
1202 /* defined in bytecode.c */
1203 extern Lisp_Object Qbytecode
;
1204 extern Lisp_Object
Fbyte_code ();
1206 /* defined in macros.c */
1207 extern Lisp_Object Qexecute_kbd_macro
;
1208 extern Lisp_Object
Fexecute_kbd_macro ();
1210 /* defined in undo.c */
1211 extern Lisp_Object
Fundo_boundary ();
1212 extern Lisp_Object
truncate_undo_list ();
1214 /* Nonzero means Emacs has already been initialized.
1215 Used during startup to detect startup of dumped Emacs. */
1216 extern int initialized
;
1218 extern int immediate_quit
; /* Nonzero means ^G can quit instantly */
1220 extern void debugger ();
1222 extern char *malloc (), *realloc (), *getenv (), *ctime (), *getwd ();
1223 extern long *xmalloc (), *xrealloc ();
1225 extern char *egetenv ();