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- /* Fundamental definitions for GNU Emacs Lisp interpreter.
- Copyright (C) 1985, 1986, 1987 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 1, 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; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-
- /* Define the fundamental Lisp data structures */
-
- /* This is the set of Lisp data types */
-
- enum Lisp_Type
- {
- /* Integer. object.v.integer is the integer value. */
- Lisp_Int,
-
- /* Symbol. object.v.symbol points to a struct Lisp_Symbol. */
- Lisp_Symbol,
-
- /* Marker (editor pointer). object.v.marker points to a struct Lisp_Marker. */
- Lisp_Marker,
-
- /* String. object.v.string points to a struct Lisp_String.
- The length of the string, and its contents, are stored therein. */
- Lisp_String,
-
- /* Vector of Lisp objects. object.v.vector points to a struct Lisp_Vector.
- The length of the vector, and its contents, are stored therein. */
- Lisp_Vector,
-
- /* Cons. object.v.cons points to a struct Lisp_Cons. */
- Lisp_Cons,
-
- /* >>> No longer used */
- Lisp_Object_Unused_1,
- #if 0
- was...
- /* Treated like vector in GC, except do not set its mark bit.
- Used for internal data blocks that will be explicitly freed
- but which, while active, are reached by GC mark exactly once
- and should be marked through like a vector. */
- Lisp_Temp_Vector,
- #endif /* 0 */
-
- /* Editor buffer. obj.v.buffer points to a struct buffer.
- No buffer is ever truly freed; they can be "killed", but this
- just marks them as dead. */
- Lisp_Buffer,
-
- /* Built-in function. obj.v.subr points to a struct Lisp_Subr
- which describes how to call the function, and its documentation,
- as well as pointing to the code. */
- Lisp_Subr,
-
- /* Internal value return by subroutines of read.
- The user never sees this data type.
- Its value is just a number. */
- Lisp_Internal,
-
- /* Forwarding pointer to an int variable.
- This is allowed only in the value cell of a symbol,
- and it means that the symbol's value really lives in the
- specified int variable.
- obj.v.intptr points to the int variable. */
- Lisp_Intfwd,
-
- /* Boolean forwarding pointer to an int variable.
- This is like Lisp_Intfwd except that the ostensible "value" of the symbol
- is t if the int variable is nonzero, nil if it is zero.
- obj.v.intptr points to the int variable. */
- Lisp_Boolfwd,
-
- /* Object describing a connection to a subprocess.
- It points to storage of type struct Lisp_Process */
- Lisp_Process,
-
- /* Forwarding pointer to a Lisp_Object variable.
- This is allowed only in the value cell of a symbol,
- and it means that the symbol's value really lives in the
- specified variable.
- obj.v.objfwd points to the Lisp_Object variable. */
- Lisp_Objfwd,
-
- /* was Lisp_Internal */
- Lisp_Object_Unused_2,
-
- /* Used when a FILE * value needs to be passed
- in an argument of type Lisp_Object.
- You must do (FILE *) obj.v.integer to get the value.
- The user will never see this data type. */
- Lisp_Internal_Stream,
-
- /* Used in a symbol value cell when the symbol's value is per-buffer.
- The actual contents are a cons cell which starts a list like this:
- (REALVALUE BUFFER CURRENT-ALIST-ELEMENT . DEFAULT-VALUE)).
-
- BUFFER is the last buffer for which this symbol's value was
- made up to date.
-
- CURRENT-ALIST-ELEMENT is a pointer to an element of BUFFER's
- b_local_var_alist, that being the element whose car is this variable.
- Or it can be a pointer to the (CURRENT-ALIST-ELEMENT . DEFAULT-VALUE), if BUFFER
- does not have an element in its alist for this variable
- (that is, if BUFFER sees the default value of this variable).
-
- If we want to examine or set the value and BUFFER is current,
- we just examine or set REALVALUE.
- If BUFFER is not current, we store the current REALVALUE value into
- CURRENT-ALIST-ELEMENT, then find the appropriate alist element for
- the buffer now current and set up CURRENT-ALIST-ELEMENT.
- Then we set REALVALUE out of that element, and store into BUFFER.
-
- If we are setting the variable and the current buffer does not have
- an alist entry for this variable, an alist entry is created.
-
- Note that REALVALUE can be a forwarding pointer.
- Each time it is examined or set, forwarding must be done. */
- Lisp_Buffer_Local_Value,
-
- /* Like Lisp_Buffer_Local_Value with one difference:
- merely setting the variable while some buffer is current
- does not cause that buffer to have its own local value of this variable.
- Only make-local-variable does that. */
- Lisp_Some_Buffer_Local_Value,
-
-
- /* Like Lisp_Objfwd except that value lives in a slot
- in the current buffer. Value is byte index of slot within buffer */
- Lisp_Buffer_Objfwd,
-
- /* In symbol value cell, means var is unbound.
- In symbol function cell, means function name is undefined. */
- Lisp_Void,
-
- /* Window used for Emacs display.
- Data inside looks like a Lisp_Vector. */
- Lisp_Window,
-
- /* Used by save,set,restore-window-configuration */
- Lisp_Window_Configuration
- };
-
- #ifndef NO_UNION_TYPE
-
- #ifndef BIG_ENDIAN
-
- /* Definition of Lisp_Object for little-endian machines. */
-
- typedef
- union Lisp_Object
- {
- /* Used for comparing two Lisp_Objects;
- also, positive integers can be accessed fast this way. */
- int i;
-
- struct
- {
- int val: 24;
- char type;
- } s;
- struct
- {
- unsigned int val: 24;
- char type;
- } u;
- struct
- {
- unsigned int val: 24;
- enum Lisp_Type type: 7;
- /* The markbit is not really part of the value of a Lisp_Object,
- and is always zero except during garbage collection. */
- unsigned int markbit: 1;
- } gu;
- }
- Lisp_Object;
-
- #else /* If BIG_ENDIAN */
-
- typedef
- union Lisp_Object
- {
- /* Used for comparing two Lisp_Objects;
- also, positive integers can be accessed fast this way. */
- int i;
-
- struct
- {
- char type;
- int val: 24;
- } s;
- struct
- {
- char type;
- unsigned int val: 24;
- } u;
- struct
- {
- /* The markbit is not really part of the value of a Lisp_Object,
- and is always zero except during garbage collection. */
- unsigned int markbit: 1;
- enum Lisp_Type type: 7;
- unsigned int val: 24;
- } gu;
- }
- Lisp_Object;
-
- #endif /* BIG_ENDIAN */
-
- #endif /* NO_UNION_TYPE */
-
-
- /* If union type is not wanted, define Lisp_Object as just a number
- and define the macros below to extract fields by shifting */
-
- #ifdef NO_UNION_TYPE
-
- #define Lisp_Object int
-
- /* These values are overridden by the m- file on some machines. */
- #ifndef VALBITS
- #define VALBITS 24
- #endif
-
- #ifndef GCTYPEBITS
- #define GCTYPEBITS 7
- #endif
-
- #ifndef VALMASK
- #define VALMASK ((1<<VALBITS) - 1)
- #endif
- #define GCTYPEMASK ((1<<GCTYPEBITS) - 1)
- #define MARKBIT (1 << (VALBITS + GCTYPEBITS))
-
- #endif /* NO_UNION_TYPE */
-
- /* These macros extract various sorts of values from a Lisp_Object.
- For example, if tem is a Lisp_Object whose type is Lisp_Cons,
- XCONS (tem) is the struct Lisp_Cons * pointing to the memory for that cons. */
-
- #ifdef NO_UNION_TYPE
-
- /* One need to override this if there must be high bits set in data space
- (doing the result of the below & ((1 << (GCTYPE + 1)) - 1) would work
- on all machines, but would penalise machines which don't need it)
- */
- #ifndef XTYPE
- #define XTYPE(a) ((enum Lisp_Type) ((a) >> VALBITS))
- #endif
-
- #ifndef XSETTYPE
- #define XSETTYPE(a, b) ((a) = XUINT (a) | ((int)(b) << VALBITS))
- #endif
-
- /* Use XFASTINT for fast retrieval and storage of integers known
- to be positive. This takes advantage of the fact that Lisp_Int is 0. */
- #define XFASTINT(a) (a)
-
- /* Extract the value of a Lisp_Object as a signed integer. */
-
- #ifndef XINT /* Some machines need to do this differently. */
- #define XINT(a) (((a) << INTBITS-VALBITS) >> (INTBITS-VALBITS))
- #endif
-
- /* Extract the value as an unsigned integer. This is a basis
- for exctacting it as a pointer to a structure in storage. */
-
- #ifndef XUINT
- #define XUINT(a) ((a) & VALMASK)
- #endif
-
- #ifdef HAVE_SHM
- /* In this representation, data is found in two widely separated segments. */
- #define XPNTR(a) \
- (XUINT (a) | (XUINT (a) > PURESIZE ? DATA_SEG_BITS : PURE_SEG_BITS))
- #else /* not HAVE_SHM */
- #ifdef DATA_SEG_BITS
- /* This case is used for the rt-pc and the Amiga.
- In the diffs I was given, it checked for ptr = 0
- and did not adjust it in that case.
- But I don't think that zero should ever be found
- in a Lisp object whose data type says it points to something. */
- #define XPNTR(a) (XUINT (a) | DATA_SEG_BITS)
- #else /* not DATA_SEG_BITS */
- #define XPNTR(a) XUINT (a)
- #endif
- #endif /* not HAVE_SHM */
-
- #ifndef XSETINT
- #define XSETINT(a, b) ((a) = ((a) & ~VALMASK) | ((b) & VALMASK))
- #endif
-
- #ifndef XSETUINT
- #define XSETUINT(a, b) XSETINT (a, b)
- #endif
-
- #ifndef XSETPNTR
- #define XSETPNTR(a, b) XSETINT (a, b)
- #endif
-
- #ifndef XSET
- #define XSET(var, type, ptr) \
- ((var) = ((int)(type) << VALBITS) + ((int) (ptr) & VALMASK))
- #endif
-
- /* During garbage collection, XGCTYPE must be used for extracting types
- so that the mark bit is ignored. XMARKBIT access the markbit.
- Markbits are used only in particular slots of particular structure types.
- Other markbits are always zero.
- Outside of garbage collection, all mark bits are always zero. */
-
- #ifndef XGCTYPE
- #define XGCTYPE(a) ((enum Lisp_Type) (((a) >> VALBITS) & GCTYPEMASK))
- #endif
-
- /* In version 19, try
- #if VALBITS + GCTYPEBITS == INTBITS - 1
- #define XMARKBIT(a) ((a) < 0)
- #define XSETMARKBIT(a,b) ((a) = ((a) & ~MARKBIT) | ((b) ? MARKBIT : 0))
- */
-
- #ifndef XMARKBIT
- #define XMARKBIT(a) ((a) & MARKBIT)
- #endif
-
- #ifndef XSETMARKBIT
- #define XSETMARKBIT(a,b) ((a) = ((a) & ~MARKBIT) | (b))
- #endif
-
- #ifndef XMARK
- #define XMARK(a) ((a) |= MARKBIT)
- #endif
-
- #ifndef XUNMARK
- #define XUNMARK(a) ((a) &= ~MARKBIT)
- #endif
-
- #endif /* NO_UNION_TYPE */
-
- #ifndef NO_UNION_TYPE
-
- #define XTYPE(a) ((enum Lisp_Type) (a).u.type)
- #define XSETTYPE(a, b) ((a).u.type = (char) (b))
-
- /* Use XFASTINT for fast retrieval and storage of integers known
- to be positive. This takes advantage of the fact that Lisp_Int is 0. */
- #define XFASTINT(a) ((a).i)
-
- #ifdef EXPLICIT_SIGN_EXTEND
- /* Make sure we sign-extend; compilers have been known to fail to do so. */
- #define XINT(a) (((a).i << 8) >> 8)
- #else
- #define XINT(a) ((a).s.val)
- #endif /* EXPLICIT_SIGN_EXTEND */
-
- #define XUINT(a) ((a).u.val)
- #define XPNTR(a) ((a).u.val)
- #define XSETINT(a, b) ((a).s.val = (int) (b))
- #define XSETUINT(a, b) ((a).s.val = (int) (b))
- #define XSETPNTR(a, b) ((a).s.val = (int) (b))
-
- #define XSET(var, vartype, ptr) \
- (((var).s.type = ((char) (vartype))), ((var).s.val = ((int) (ptr))))
-
- /* During garbage collection, XGCTYPE must be used for extracting types
- so that the mark bit is ignored. XMARKBIT access the markbit.
- Markbits are used only in particular slots of particular structure types.
- Other markbits are always zero.
- Outside of garbage collection, all mark bits are always zero. */
-
- #define XGCTYPE(a) ((a).gu.type)
- #define XMARKBIT(a) ((a).gu.markbit)
- #define XSETMARKBIT(a,b) (XMARKBIT(a) = (b))
- #define XMARK(a) (XMARKBIT(a) = 1)
- #define XUNMARK(a) (XMARKBIT(a) = 0)
-
- #endif /* NO_UNION_TYPE */
-
-
- #define XCONS(a) ((struct Lisp_Cons *) XPNTR(a))
- #define XBUFFER(a) ((struct buffer *) XPNTR(a))
- #define XVECTOR(a) ((struct Lisp_Vector *) XPNTR(a))
- #define XSUBR(a) ((struct Lisp_Subr *) XPNTR(a))
- #define XSTRING(a) ((struct Lisp_String *) XPNTR(a))
- #define XSYMBOL(a) ((struct Lisp_Symbol *) XPNTR(a))
- #define XFUNCTION(a) ((Lisp_Object (*)()) XPNTR(a))
- #define XMARKER(a) ((struct Lisp_Marker *) XPNTR(a))
- #define XOBJFWD(a) ((Lisp_Object *) XPNTR(a))
- #define XINTPTR(a) ((int *) XPNTR(a))
- #define XWINDOW(a) ((struct window *) XPNTR(a))
- #define XPROCESS(a) ((struct Lisp_Process *) XPNTR(a))
-
- #define XSETCONS(a, b) XSETPNTR(a, (int) (b))
- #define XSETBUFFER(a, b) XSETPNTR(a, (int) (b))
- #define XSETVECTOR(a, b) XSETPNTR(a, (int) (b))
- #define XSETSUBR(a, b) XSETPNTR(a, (int) (b))
- #define XSETSTRING(a, b) XSETPNTR(a, (int) (b))
- #define XSETSYMBOL(a, b) XSETPNTR(a, (int) (b))
- #define XSETFUNCTION(a, b) XSETPNTR(a, (int) (b))
- #define XSETMARKER(a, b) XSETPNTR(a, (int) (b))
- #define XSETOBJFWD(a, b) XSETPNTR(a, (int) (b))
- #define XSETINTPTR(a, b) XSETPNTR(a, (int) (b))
- #define XSETWINDOW(a, b) XSETPNTR(a, (int) (b))
- #define XSETPROCESS(a, b) XSETPNTR(a, (int) (b))
-
- /* In a cons, the markbit of the car is the gc mark bit */
-
- struct Lisp_Cons
- {
- Lisp_Object car, cdr;
- };
-
- /* Like a cons, but records info on where the text lives that it was read from */
- /* This is not really in use now */
-
- struct Lisp_Buffer_Cons
- {
- Lisp_Object car, cdr;
- struct buffer *buffer;
- int bufpos;
- };
-
- /* In a string or vector, the sign bit of the `size' is the gc mark bit */
-
- struct Lisp_String
- {
- int size;
- unsigned char data[1];
- };
-
- struct Lisp_Vector
- {
- int size;
- struct Lisp_Vector *next;
- Lisp_Object contents[1];
- };
-
- /* In a symbol, the markbit of the plist is used as the gc mark bit */
-
- struct Lisp_Symbol
- {
- struct Lisp_String *name;
- Lisp_Object value;
- Lisp_Object function;
- Lisp_Object plist;
- struct Lisp_Symbol *next; /* -> next symbol in this obarray bucket */
- };
-
- struct Lisp_Subr
- {
- Lisp_Object (*function) ();
- short min_args, max_args;
- char *symbol_name;
- char *prompt;
- char *doc;
- };
-
- /* In a marker, the markbit of the chain field is used as the gc mark bit */
-
- struct Lisp_Marker
- {
- struct buffer *buffer;
- Lisp_Object chain;
- int bufpos;
- };
-
- /* Data type checking */
-
- #ifdef NULL
- #undef NULL
- #endif
- #define NULL(x) (XFASTINT (x) == XFASTINT (Qnil))
- /* #define LISTP(x) (XTYPE ((x)) == Lisp_Cons)*/
- #define CONSP(x) (XTYPE ((x)) == Lisp_Cons)
- #define EQ(x, y) (XFASTINT (x) == XFASTINT (y))
-
- #define CHECK_LIST(x, i) \
- { if ((XTYPE ((x)) != Lisp_Cons) && !NULL (x)) x = wrong_type_argument (Qlistp, (x)); }
-
- #define CHECK_STRING(x, i) \
- { if (XTYPE ((x)) != Lisp_String) x = wrong_type_argument (Qstringp, (x)); }
-
- #define CHECK_CONS(x, i) \
- { if (XTYPE ((x)) != Lisp_Cons) x = wrong_type_argument (Qconsp, (x)); }
-
- #define CHECK_SYMBOL(x, i) \
- { if (XTYPE ((x)) != Lisp_Symbol) x = wrong_type_argument (Qsymbolp, (x)); }
-
- #define CHECK_VECTOR(x, i) \
- { if (XTYPE ((x)) != Lisp_Vector) x = wrong_type_argument (Qvectorp, (x)); }
-
- #define CHECK_BUFFER(x, i) \
- { if (XTYPE ((x)) != Lisp_Buffer) x = wrong_type_argument (Qbufferp, (x)); }
-
- #define CHECK_WINDOW(x, i) \
- { if (XTYPE ((x)) != Lisp_Window) x = wrong_type_argument (Qwindowp, (x)); }
-
- #define CHECK_PROCESS(x, i) \
- { if (XTYPE ((x)) != Lisp_Process) x = wrong_type_argument (Qprocessp, (x)); }
-
- #define CHECK_NUMBER(x, i) \
- { if (XTYPE ((x)) != Lisp_Int) x = wrong_type_argument (Qintegerp, (x)); }
-
- #define CHECK_MARKER(x, i) \
- { if (XTYPE ((x)) != Lisp_Marker) x = wrong_type_argument (Qmarkerp, (x)); }
-
- #define CHECK_NUMBER_COERCE_MARKER(x, i) \
- { if (XTYPE ((x)) == Lisp_Marker) XFASTINT (x) = marker_position (x); \
- else if (XTYPE ((x)) != Lisp_Int) x = wrong_type_argument (Qinteger_or_marker_p, (x)); }
-
- #ifdef AMIGA_DUMP
- #define CHECK_IMPURE(obj) \
- { extern int *pure, puresize; \
- if ((PNTR_COMPARISON_TYPE) XPNTR (obj) < (PNTR_COMPARISON_TYPE) ((char *) pure + puresize) \
- && (PNTR_COMPARISON_TYPE) XPNTR (obj) >= (PNTR_COMPARISON_TYPE) pure) \
- pure_write_error (); }
- #else /* not AMIGA_DUMP */
- #ifdef VIRT_ADDR_VARIES
-
- /* For machines like APOLLO where text and data can go anywhere
- in virtual memory. */
- #define CHECK_IMPURE(obj) \
- { extern int pure[]; \
- if ((PNTR_COMPARISON_TYPE) XPNTR (obj) < (PNTR_COMPARISON_TYPE) ((char *) pure + PURESIZE) \
- && (PNTR_COMPARISON_TYPE) XPNTR (obj) >= (PNTR_COMPARISON_TYPE) pure) \
- pure_write_error (); }
- #else /* not VIRT_ADDR_VARIES */
- #ifdef PNTR_COMPARISON_TYPE
-
- /* when PNTR_COMPARISON_TYPE is not the default (unsigned int) */
- #define CHECK_IMPURE(obj) \
- { extern int my_edata; \
- if ((PNTR_COMPARISON_TYPE) XPNTR (obj) < (PNTR_COMPARISON_TYPE) &my_edata) \
- pure_write_error (); }
-
- #else /* not VIRT_ADDRESS_VARIES, not PNTR_COMPARISON_TYPE */
-
- #define CHECK_IMPURE(obj) \
- { extern int my_edata; \
- if (XPNTR (obj) < (unsigned int) &my_edata) \
- pure_write_error (); }
-
- #endif /* PNTR_COMPARISON_TYPE */
- #endif /* VIRT_ADDRESS_VARIES */
- #endif /* not AMIGA_DUMP */
-
- /* Cast pointers to this type to compare them. Some machines want int. */
- #ifndef PNTR_COMPARISON_TYPE
- #define PNTR_COMPARISON_TYPE unsigned int
- #endif
-
- /* Define a built-in function for calling from Lisp.
- `lname' should be the name to give the function in Lisp,
- as a null-terminated C string.
- `fnname' should be the name of the function in C.
- By convention, it starts with F.
- `sname' should be the name for the C constant structure
- that records information on this function for internal use.
- By convention, it should be the same as `fnname' but with S instead of F.
- It's too bad that C macros can't compute this from `fnname'.
- `minargs' should be a number, the minimum number of arguments allowed.
- `maxargs' should be a number, the maximum number of arguments allowed,
- or else MANY or UNEVALLED.
- MANY means pass a vector of evaluated arguments,
- in the form of an integer number-of-arguments
- followed by the address of a vector of Lisp_Objects
- which contains the argument values.
- UNEVALLED means pass the list of unevaluated arguments
- `prompt' says how to read arguments for an interactive call.
- This can be zero or a C string.
- Zero means that interactive calls are not allowed.
- A string is interpreted in a hairy way:
- it should contain one line for each argument to be read, terminated by \n.
- The first character of the line controls the type of parsing:
- s -- read a string.
- S -- read a symbol.
- k -- read a key sequence and return it as a string.
- a -- read a function name (symbol) with completion.
- C -- read a command name (symbol) with completion.
- v -- read a variable name (symbol) with completion.
- b -- read a buffer name (a string) with completion.
- B -- buffer name, may be existing buffer or may not be.
- f -- read a file name, file must exist.
- F -- read a file name, file need not exist.
- n -- read a number.
- c -- read a character and return it as a number.
- p -- use the numeric value of the prefix argument.
- P -- use raw value of prefix - can be nil, -, (NUMBER) or NUMBER.
- x -- read a Lisp object from the minibuffer.
- X -- read a Lisp form from the minibuffer and use its value.
- A null string means call interactively with no arguments.
- `doc' is documentation for the user.
- */
-
- #define DEFUN(lname, fnname, sname, minargs, maxargs, prompt, doc) \
- Lisp_Object fnname (); \
- struct Lisp_Subr sname = {fnname, minargs, maxargs, lname, prompt, 0}; \
- Lisp_Object fnname
-
- /* defsubr (Sname);
- is how we define the symbol for function `name' at start-up time. */
- extern void defsubr ();
-
- #define MANY -2
- #define UNEVALLED -1
-
- /* Macros we use to define forwarded Lisp variables.
- These are used in the syms_of_FILENAME functions. */
-
- #define DEFVARLISP(lname, vname, doc) defvar_lisp (lname, vname)
- #define DEFVARBOOL(lname, vname, doc) defvar_bool (lname, vname)
- #define DEFVARINT(lname, vname, doc) defvar_int (lname, vname)
- #define DEFVARPERBUFFER(lname, vname, doc) \
- defvar_per_buffer (lname, vname, 0)
-
- #define DEFVAR_LISP(lname, vname, doc) defvar_lisp (lname, vname)
- #define DEFVAR_LISP_NOPRO(lname, vname, doc) defvar_lisp_nopro (lname, vname)
- #define DEFVAR_BOOL(lname, vname, doc) defvar_bool (lname, vname)
- #define DEFVAR_INT(lname, vname, doc) defvar_int (lname, vname)
- #define DEFVAR_PER_BUFFER(lname, vname, doc) \
- defvar_per_buffer (lname, vname, 0)
-
- /* Structure for recording Lisp call stack for backtrace purposes */
-
- struct specbinding
- {
- Lisp_Object symbol, old_value;
- Lisp_Object (*func) ();
- Lisp_Object unused; /* Dividing by 16 is faster than by 12 */
- };
-
- extern struct specbinding *specpdl;
- extern struct specbinding *specpdl_ptr;
- extern int specpdl_size;
-
- struct handler
- {
- Lisp_Object handler;
- Lisp_Object var;
- int poll_suppress_count; /* No error should exit a piece of code
- in which polling is suppressed. */
- struct catchtag *tag;
- struct handler *next;
- };
-
- extern struct handler *handlerlist;
-
- /* Check quit-flag and quit if it is non-nil. */
-
- #define QUIT \
- if (!NULL (Vquit_flag) && NULL (Vinhibit_quit)) \
- { Vquit_flag = Qnil; Fsignal (Qquit, Qnil); }
-
- /* Nonzero if ought to quit now. */
-
- #define QUITP (!NULL (Vquit_flag) && NULL (Vinhibit_quit))
-
- /* 1 if CH is upper case. */
-
- #define UPPERCASEP(CH) (downcase_table[CH] != (CH))
-
- /* 1 if CH is lower case. */
-
- #define LOWERCASEP(CH) \
- (downcase_table[CH] == (CH) && downcase_table[0400 + (CH)] != (CH))
-
- /* 1 if CH is neither upper nor lower case. */
-
- #define NOCASEP(CH) (downcase_table[0400 + (CH)] == (CH))
-
- /* Upcase a character, or make no change if that cannot be done. */
-
- #define UPCASE(CH) (downcase_table[CH] == (CH) ? UPCASE1 (CH) : (CH))
-
- /* Upcase a character known to be not upper case. */
-
- #define UPCASE1(CH) downcase_table[0400 + (CH)]
-
- /* Downcase a character, or make no change if that cannot be done. */
-
- #define DOWNCASE(CH) downcase_table[CH]
-
- /* number of bytes of structure consed since last GC */
-
- extern int consing_since_gc;
-
- /* threshold for doing another gc */
-
- extern int gc_cons_threshold;
-
- /* value of consing_since_gc when undos were last truncated. */
-
- extern int consing_at_last_truncate;
-
- /* Structure for recording stack slots that need marking */
-
- /* This is a chain of structures, each of which points at a Lisp_Object variable
- whose value should be marked in garbage collection.
- Normally every link of the chain is an automatic variable of a function,
- and its `val' points to some argument or local variable of the function.
- On exit to the function, the chain is set back to the value it had on entry.
- This way, no link remains in the chain when the stack frame containing the link disappears.
-
- Every function that can call Feval must protect in this fashion all
- Lisp_Object variables whose contents will be used again. */
-
- extern struct gcpro *gcprolist;
-
- struct gcpro
- {
- struct gcpro *next;
- Lisp_Object *var; /* Address of first protected variable */
- int nvars; /* Number of consecutive protected variables */
- };
-
- #define GCPRO1(varname) \
- {gcpro1.next = gcprolist; gcpro1.var = &varname; gcpro1.nvars = 1; \
- gcprolist = &gcpro1; }
-
- #define GCPRO2(varname1, varname2) \
- {gcpro1.next = gcprolist; gcpro1.var = &varname1; gcpro1.nvars = 1; \
- gcpro2.next = &gcpro1; gcpro2.var = &varname2; gcpro2.nvars = 1; \
- gcprolist = &gcpro2; }
-
- #define GCPRO3(varname1, varname2, varname3) \
- {gcpro1.next = gcprolist; gcpro1.var = &varname1; gcpro1.nvars = 1; \
- gcpro2.next = &gcpro1; gcpro2.var = &varname2; gcpro2.nvars = 1; \
- gcpro3.next = &gcpro2; gcpro3.var = &varname3; gcpro3.nvars = 1; \
- gcprolist = &gcpro3; }
-
- #define GCPRO4(varname1, varname2, varname3, varname4) \
- {gcpro1.next = gcprolist; gcpro1.var = &varname1; gcpro1.nvars = 1; \
- gcpro2.next = &gcpro1; gcpro2.var = &varname2; gcpro2.nvars = 1; \
- gcpro3.next = &gcpro2; gcpro3.var = &varname3; gcpro3.nvars = 1; \
- gcpro4.next = &gcpro3; gcpro4.var = &varname4; gcpro4.nvars = 1; \
- gcprolist = &gcpro4; }
-
- /* Call staticpro (&var) to protect static variable `var'. */
-
- void staticpro();
-
- #define UNGCPRO (gcprolist = gcpro1.next)
-
- /* Defined in data.c */
- extern Lisp_Object Qnil, Qt, Qquote, Qlambda, Qsubr, Qunbound;
- extern Lisp_Object Qerror_conditions, Qerror_message, Qtop_level;
- extern Lisp_Object Qerror, Qquit, Qwrong_type_argument, Qargs_out_of_range;
- extern Lisp_Object Qvoid_variable, Qvoid_function;
- extern Lisp_Object Qsetting_constant, Qinvalid_read_syntax;
- extern Lisp_Object Qinvalid_function, Qwrong_number_of_arguments, Qno_catch;
- extern Lisp_Object Qend_of_file, Qarith_error;
- extern Lisp_Object Qbeginning_of_buffer, Qend_of_buffer, Qbuffer_read_only;
-
- extern Lisp_Object Qintegerp, Qnatnump, Qsymbolp, Qlistp, Qconsp;
- extern Lisp_Object Qstringp, Qarrayp, Qsequencep, Qbufferp;
- extern Lisp_Object Qchar_or_string_p, Qmarkerp, Qvectorp;
- extern Lisp_Object Qinteger_or_marker_p, Qboundp, Qfboundp;
- extern Lisp_Object Qcdr;
-
- extern Lisp_Object Feq (), Fnull (), Flistp (), Fconsp (), Fatom (), Fnlistp ();
- extern Lisp_Object Fintegerp (), Fnatnump (), Fsymbolp ();
- extern Lisp_Object Fvectorp (), Fstringp (), Farrayp (), Fsequencep ();
- extern Lisp_Object Fbufferp (), Fmarkerp (), Fsubrp (), Fchar_or_string_p ();
- extern Lisp_Object Finteger_or_marker_p ();
-
- extern Lisp_Object Fcar (), Fcar_safe(), Fcdr (), Fcdr_safe();
- extern Lisp_Object Fsetcar (), Fsetcdr ();
- extern Lisp_Object Fboundp (), Ffboundp (), Fmakunbound (), Ffmakunbound ();
- extern Lisp_Object Fsymbol_function (), Fsymbol_plist (), Fsymbol_name ();
- extern Lisp_Object Ffset (), Fsetplist ();
- extern Lisp_Object Fsymbol_value (), Fset ();
- extern Lisp_Object Fdefault_value (), Fset_default ();
-
- extern Lisp_Object Faref (), Faset (), Farray_length ();
-
- extern Lisp_Object Fstring_to_int (), Fint_to_string ();
- extern Lisp_Object Feqlsign (), Fgtr (), Flss (), Fgeq (), Fleq (), Fneq (), Fzerop ();
- extern Lisp_Object Fplus (), Fminus (), Ftimes (), Fquo (), Frem (), Fmax (), Fmin ();
- extern Lisp_Object Flogand (), Flogior (), Flogxor (), Flognot (), Flsh (), Fash ();
- extern Lisp_Object Fadd1 (), Fsub1 ();
-
- extern Lisp_Object make_number ();
- extern void args_out_of_range ();
- extern void args_out_of_range_3 ();
- extern Lisp_Object wrong_type_argument ();
-
- /* Defined in fns.c */
- extern Lisp_Object Qstring_lessp;
- extern Lisp_Object Vfeatures;
- extern Lisp_Object Fidentity (), Frandom ();
- extern Lisp_Object Flength ();
- extern Lisp_Object Fappend (), Fconcat (), Fvconcat (), Fcopy_sequence ();
- extern Lisp_Object Fsubstring ();
- extern Lisp_Object Fnthcdr (), Fmemq (), Fassq (), Fassoc ();
- extern Lisp_Object Frassq (), Fdelq (), Fsort ();
- extern Lisp_Object Freverse (), Fnreverse (), Fget (), Fput (), Fequal ();
- extern Lisp_Object Ffillarray (), Fnconc (), Fmapcar (), Fmapconcat ();
- extern Lisp_Object Fy_or_n_p (), Fyes_or_no_p ();
- extern Lisp_Object Ffeaturep (), Frequire () , Fprovide ();
- extern Lisp_Object concat2 (), nconc2 ();
- extern Lisp_Object assq_no_quit ();
-
- /* Defined in alloc.c */
- extern Lisp_Object Vpurify_flag;
- extern Lisp_Object Fcons (), Flist(), Fmake_list ();
- extern Lisp_Object Fmake_vector (), Fvector (), Fmake_symbol (), Fmake_marker ();
- extern Lisp_Object Fmake_string (), build_string (), make_string();
- extern Lisp_Object Fpurecopy (), make_pure_string ();
- extern Lisp_Object pure_cons (), make_pure_vector ();
- extern Lisp_Object Fgarbage_collect ();
-
- /* Defined in print.c */
- extern Lisp_Object Vprin1_to_string_buffer;
- extern Lisp_Object Fprin1 (), Fprin1_to_string (), Fprinc ();
- extern Lisp_Object Fterpri (), Fprint ();
- extern Lisp_Object Vstandard_output, Qstandard_output;
- extern temp_output_buffer_setup (), temp_output_buffer_show ();
-
- /* Defined in lread.c */
- extern Lisp_Object Qvariable_documentation, Qstandard_input;
- extern Lisp_Object Vobarray, Vstandard_input;
- extern Lisp_Object Fread (), Fread_from_string ();
- extern Lisp_Object Fintern (), Fintern_soft (), Fload ();
- extern Lisp_Object Fget_file_char (), Fread_char ();
- extern Lisp_Object Feval_current_buffer (), Feval_region ();
- extern Lisp_Object intern (), oblookup ();
-
- /* Defined in eval.c */
- extern Lisp_Object Qautoload, Qexit, Qinteractive, Qcommandp, Qdefun, Qmacro;
- extern Lisp_Object Vinhibit_quit, Vquit_flag, Qinhibit_quit;
- extern Lisp_Object Vmocklisp_arguments, Qmocklisp, Qmocklisp_arguments;
- extern Lisp_Object Vautoload_queue;
- extern Lisp_Object Fand (), For (), Fif (), Fprogn (), Fprog1 (), Fprog2 ();
- extern Lisp_Object Fsetq (), Fquote ();
- extern Lisp_Object Fuser_variable_p (), Finteractive_p ();
- extern Lisp_Object Fdefun (), Flet (), FletX (), Fwhile ();
- extern Lisp_Object Fcatch (), Fthrow (), Funwind_protect ();
- extern Lisp_Object Fcondition_case (), Fsignal ();
- extern Lisp_Object Ffunction_type (), Fautoload (), Fcommandp ();
- extern Lisp_Object Feval (), Fapply (), Ffuncall ();
- extern Lisp_Object Fglobal_set (), Fglobal_value (), Fbacktrace ();
- extern Lisp_Object apply1 (), call0 (), call1 (), call2 (), call3 ();
- extern Lisp_Object apply_lambda ();
- extern Lisp_Object internal_catch ();
- extern Lisp_Object internal_condition_case ();
- extern void unbind_to ();
- extern void error ();
- extern Lisp_Object un_autoload ();
-
- /* Defined in editfns.c */
- extern Lisp_Object Vprefix_arg, Qminus, Vcurrent_prefix_arg;
- extern Lisp_Object Fgoto_char ();
- extern Lisp_Object Fpoint_min_marker (), Fpoint_max_marker ();
- extern Lisp_Object Fpoint_min (), Fpoint_max ();
- extern Lisp_Object Fpoint (), Fpoint_marker (), Fmark_marker ();
- extern Lisp_Object Ffollchar (), Fprevchar (), Fchar_after (), Finsert ();
- extern Lisp_Object Feolp (), Feobp (), Fbolp (), Fbobp ();
- extern Lisp_Object Fformat (), format1 ();
- extern Lisp_Object Fbuffer_substring (), Fbuffer_string ();
- extern Lisp_Object Fstring_equal (), Fstring_lessp (), Fbuffer_substring_lessp ();
- extern Lisp_Object save_excursion_save (), save_restriction_save ();
- extern Lisp_Object save_excursion_restore (), save_restriction_restore ();
- extern Lisp_Object Fchar_to_string ();
-
- /* defined in buffer.c */
- extern Lisp_Object Vbuffer_alist;
- extern Lisp_Object Fget_buffer (), Fget_buffer_create (), Fset_buffer ();
- extern Lisp_Object Fbarf_if_buffer_read_only ();
- extern Lisp_Object Fcurrent_buffer (), Fswitch_to_buffer (), Fpop_to_buffer ();
- extern Lisp_Object Fother_buffer ();
- extern struct buffer *all_buffers;
-
- /* defined in marker.c */
-
- extern Lisp_Object Fmarker_position (), Fmarker_buffer ();
- extern Lisp_Object Fcopy_marker ();
-
- /* Defined in fileio.c */
-
- extern Lisp_Object Qfile_error;
- extern Lisp_Object Ffile_name_as_directory ();
- extern Lisp_Object Fexpand_file_name (), Ffile_name_nondirectory ();
- extern Lisp_Object Fsubstitute_in_file_name ();
- extern Lisp_Object Ffile_symlink_p ();
-
- /* Defined in abbrev.c */
-
- extern Lisp_Object Vfundamental_mode_abbrev_table;
-
- /* defined in search.c */
- extern unsigned char downcase_table[];
- extern Lisp_Object Fstring_match ();
- extern Lisp_Object Fscan_buffer ();
-
- /* defined in minibuf.c */
-
- extern Lisp_Object last_minibuf_string, Vminibuffer_list;
- extern Lisp_Object read_minibuf (), Fcompleting_read ();
- extern Lisp_Object Fread_from_minibuffer ();
- extern Lisp_Object Fread_variable ();
- extern Lisp_Object Fread_minibuffer (), Feval_minibuffer ();
- extern Lisp_Object Fread_string (), Fread_file_name ();
- extern Lisp_Object Fread_no_blanks_input ();
-
- /* Defined in callint.c */
-
- extern Lisp_Object Vcommand_history;
- extern Lisp_Object Qcall_interactively;
- extern Lisp_Object Fcall_interactively ();
- extern Lisp_Object Fprefix_numeric_value ();
-
- /* defined in casefiddle.c */
-
- extern Lisp_Object Fdowncase (), Fupcase (), Fcapitalize ();
-
- /* defined in keyboard.c */
-
- extern Lisp_Object Vhelp_form, Vtop_level;
- extern Lisp_Object Fdiscard_input (), Frecursive_edit ();
- extern Lisp_Object Fcommand_execute (), Finput_pending_p ();
- extern int poll_suppress_count;
-
- /* defined in keymap.c */
-
- extern Lisp_Object Qkeymap;
- extern Lisp_Object Fkey_description (), Fsingle_key_description ();
- extern Lisp_Object Fwhere_is_internal ();
- extern Lisp_Object access_keymap (), store_in_keymap ();
- extern Lisp_Object get_keyelt (), get_keymap();
-
- /* defined in indent.c */
- extern Lisp_Object Fvertical_motion (), Findent_to (), Fcurrent_column ();
-
- /* defined in window.c */
- extern Lisp_Object Qwindowp;
- extern Lisp_Object Fget_buffer_window ();
- extern Lisp_Object Fsave_window_excursion ();
- extern Lisp_Object Fset_window_configuration (), Fcurrent_window_configuration ();
-
- /* defined in emacs.c */
- extern Lisp_Object decode_env_path ();
- /* Nonzero means don't do interactive redisplay and don't change tty modes */
- extern int noninteractive;
- /* Nonzero means don't do use window-system-specific display code */
- extern int inhibit_window_system;
-
- /* defined in process.c */
- extern Lisp_Object Fget_process (), Fget_buffer_process (), Fprocessp ();
- extern Lisp_Object Fprocess_status (), Fkill_process ();
-
- /* defined in callproc.c */
- extern Lisp_Object Vexec_path, Vexec_directory;
-
- #ifdef MAINTAIN_ENVIRONMENT
- /* defined in environ.c */
- extern int size_of_current_environ ();
- extern void get_current_environ ();
- /* extern void current_environ (); */
- extern Lisp_Object Fgetenv ();
- #endif /* MAINTAIN_ENVIRONMENT */
-
- /* defined in doc.c */
- extern Lisp_Object Vdoc_file_name;
- extern Lisp_Object Fsubstitute_command_keys ();
- extern Lisp_Object Fdocumentation (), Fdocumentation_property ();
-
- /* defined in bytecode.c */
- extern Lisp_Object Qbytecode;
-
- /* defined in macros.c */
- extern Lisp_Object Fexecute_kbd_macro ();
-
- /* Nonzero means Emacs has already been initialized.
- Used during startup to detect startup of dumped Emacs. */
- extern int initialized;
-
- extern int immediate_quit; /* Nonzero means ^G can quit instantly */
-
- extern void debugger ();
-
- extern char *malloc (), *realloc (), *getenv (), *ctime (), *getwd ();
- extern long *xmalloc (), *xrealloc ();
-
- #ifdef MAINTAIN_ENVIRONMENT
- extern unsigned char *egetenv ();
- #else
- #define egetenv getenv
- #endif
-