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- /* Fundamental definitions for GNU Emacs Lisp interpreter.
- Copyright (C) 1985-1993 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 2, 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. */
-
- #ifndef _EMACS_LISP_H_
- #define _EMACS_LISP_H_
-
- #ifdef emacs /* some things other than emacs want the structs */
- #if __STDC__
-
- /* I don't know how correct this attempt to get more prototypes is... */
- # if defined(sun) && defined(_POSIX_SOURCE)
- # undef _POSIX_SOURCE
- # endif
-
- # if defined(__lucid) && !defined(__STDC_EXTENDED__)
- # define __STDC_EXTENDED__ 1
- # endif
-
- # include <stdlib.h>
- # include <unistd.h>
- # include <string.h>
-
- # ifdef __lucid
- # include <sysent.h>
- # endif
-
- #ifdef NeXT
- typedef int pid_t;
- #endif
-
- #endif /* __STDC__ */
- #endif /* emacs */
-
- /* Define the fundamental Lisp data structures */
-
- /* This is the set of Lisp data types */
-
- enum Lisp_Type
- {
- /* Integer. XINT(obj) is the integer value. */
- Lisp_Int,
-
- /* Symbol. XSYMBOL (object) points to a struct Lisp_Symbol. */
- Lisp_Symbol,
-
- /* Marker (buffer ptr). XMARKER(object) points to a struct Lisp_Marker. */
- Lisp_Marker,
-
- /* String. XSTRING (object) points to a struct Lisp_String.
- The length of the string, and its contents, are stored therein. */
- Lisp_String,
-
- /* Vector of Lisp objects. XVECTOR(object) points to a struct Lisp_Vector.
- The length of the vector, and its contents, are stored therein. */
- Lisp_Vector,
-
- /* Cons. XCONS (object) points to a struct Lisp_Cons. */
- Lisp_Cons,
-
- /* Byte-compiled function. A vector of 4 to 6 elements which are the
- arglist, bytecode-string, constant vector, stack size,
- (optional) doc string, and (optional) interactive spec. */
- Lisp_Compiled,
-
- /* Editor buffer. XBUFFER(obj) points to a struct buffer. */
- Lisp_Buffer,
-
- /* Built-in function. XSUBR(obj) 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.
- XINTPTR(obj) 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. XINTPTR(obj) 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.
- XOBJFWD(obj) points to the Lisp_Object variable. */
- Lisp_Objfwd,
-
- /* Pointer to a vector-like object describing a display screen
- on which Emacs can display a window hierarchy. */
- Lisp_Screen,
-
- /* Used when a FILE * value needs to be passed
- in an argument of type Lisp_Object.
- You must do *(FILE **) XPNTR(obj) 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,
-
- /* An active region in buffer or string. XEXTENT (obj) is
- typedef EXTENT. */
- Lisp_Extent,
-
- Lisp_Extent_Data,
-
- Lisp_Extent_Replica,
-
- #ifdef LISP_FLOAT_TYPE
- Lisp_Float,
- #endif /* LISP_FLOAT_TYPE */
-
- Lisp_Event,
- Lisp_Keymap
- };
-
- #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 extracting it as a pointer to a structure in storage. */
-
- #ifndef XUINT
- #define XUINT(a) ((a) & VALMASK)
- #endif
-
- #ifndef XPNTR
- #ifdef HAVE_SHM
- /* In this representation, data is found in two widely separated segments. */
- extern int pure_size;
- #define XPNTR(a) \
- (XUINT (a) | (XUINT (a) > pure_size ? DATA_SEG_BITS : PURE_SEG_BITS))
- #else /* not HAVE_SHM */
- #ifdef DATA_SEG_BITS
- /* This case is used for the rt-pc.
- 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
- #define XPNTR(a) XUINT (a)
- #endif
- #endif /* not HAVE_SHM */
- #endif /* no XPNTR */
-
- #ifndef XSETINT
- #if 0 /* This is the nominal def, but it breaks things. */
- #define XSETINT(a, b) XSET ((a), Lisp_Int, (b))
- #endif
- #define XSETINT(a, b) ((a) = ((a) & ~VALMASK) | ((b) & VALMASK))
- #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 accesses 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
-
- #if VALBITS + GCTYPEBITS == INTBITS - 1
- /* Make XMARKBIT faster if mark bit is sign bit. */
- #ifndef XMARKBIT
- #define XMARKBIT(a) ((a) < 0)
- #endif
- #endif /* markbit is sign bit */
-
- #ifndef XMARKBIT
- #define XMARKBIT(a) ((a) & MARKBIT)
- #endif
-
- #ifndef XSETMARKBIT
- #define XSETMARKBIT(a,b) ((a) = ((a) & ~MARKBIT) | ((b) ? MARKBIT : 0))
- #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 << (32-VALBITS)) >> (32-VALBITS))
- #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 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 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 XEXTENT(a) ((EXTENT) XPNTR(a))
- #define XEXTENT_REPLICA(a) ((EXTENT_REPLICA) XPNTR(a))
- #define XPROCESS(a) ((struct Lisp_Process *) XPNTR(a))
- #ifdef LISP_FLOAT_TYPE
- #define XFLOAT(a) ((struct Lisp_Float *) XPNTR(a))
- #else
- #define XFLOAT(a) --- error! No float support. ---
- #endif
- #define XEVENT(a) ((struct Lisp_Event *) XPNTR(a))
- #define XKEYMAP(a) ((struct Lisp_Keymap *) XPNTR(a))
-
-
- /* In a cons, the markbit of the car is the gc mark bit */
-
- struct Lisp_Cons
- {
- Lisp_Object car, cdr;
- };
-
- /* In a string or vector, the sign bit of the `size' is the gc mark bit */
-
- struct Lisp_String
- {
- int size;
- Lisp_Object dup_list;
- unsigned char *data;
- };
-
- 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 */
- };
- /* next symbol in this obarray bucket */
- #define symbol_next(s) ((s)->next)
-
- struct Lisp_Subr
- {
- Lisp_Object (*function) ();
- short min_args, max_args;
- char *symbol_name;
- char *prompt;
- char *doc;
- };
- #define subr_function(subr) (subr)->function
- #define subr_name(subr) (subr)->symbol_name
-
- /* 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;
- #if 0
- int modified;
- #endif
- };
-
- #ifdef LISP_FLOAT_TYPE
- struct Lisp_Float
- {
- Lisp_Object type; /* essentially used for mark-bit
- and chaining when on free-list */
- double data;
- };
- #endif /* LISP_FLOAT_TYPE */
-
- /* These structures are defined elsewhere, but assert that they name global
- structures so that we can use pointers to them in prototypes. */
- struct Lisp_Event;
- struct Lisp_Process;
-
-
- #ifdef emacs /* gdb doesn't like this */
-
- /* A character, declared with the following typedef, is a member
- of some character set associated with the current buffer. */
- typedef unsigned char UCHAR;
-
- #endif /* emacs */
-
- /* A UCHAR is displayed on a given terminal by means of a
- sequence of one or more GLYPHs.
- A GLYPH is something that takes
- up exactly one display position on the screen. */
- typedef unsigned short GLYPH;
-
- /* Meanings of slots in a Lisp_Compiled: */
-
- #define COMPILED_ARGLIST 0
- #define COMPILED_BYTECODE 1
- #define COMPILED_CONSTANTS 2
- #define COMPILED_STACK_DEPTH 3
- #define COMPILED_DOC_STRING 4
- #define COMPILED_INTERACTIVE 5
-
- /* Data type checking */
-
- #define NILP(x) (XFASTINT (x) == XFASTINT (Qnil))
-
- #define CONSP(x) (XTYPE ((x)) == Lisp_Cons)
- #define SYMBOLP(x) (XTYPE ((x)) == Lisp_Symbol)
- #define FIXNUMP(x) (XTYPE ((x)) == Lisp_Int)
- #define MARKERP(x) (XTYPE ((x)) == Lisp_Marker)
- #define STRINGP(x) (XTYPE ((x)) == Lisp_String)
- #define VECTORP(x) (XTYPE ((x)) == Lisp_Vector)
- #define SUBRP(x) (XTYPE ((x)) == Lisp_Subr)
- #define PROCESSP(x) (XTYPE ((x)) == Lisp_Process)
- #define BUFFERP(x) (XTYPE ((x)) == Lisp_Buffer)
- #define WINDOWP(x) (XTYPE ((x)) == Lisp_Window)
- #define SCREENP(x) (XTYPE ((x)) == Lisp_Screen)
- #define KEYMAPP(x) (XTYPE ((x)) == Lisp_Keymap)
- #define COMPILEDP(x) (XTYPE ((x)) == Lisp_Compiled)
- #define EVENTP(x) (XTYPE ((x)) == Lisp_Event)
- #define EXTENTP(x) (XTYPE ((x)) == Lisp_Extent)
- #define EXTENT_REPLICA_P(x) (XTYPE ((x)) == Lisp_Extent_Replica)
-
- #ifdef LISP_FLOAT_TYPE
- #define FLOATP(x) (XTYPE ((x)) == Lisp_Float)
- #define NUMBERP(x) (FIXNUMP (x) || FLOATP (x))
- #else
- #define FLOATP(x) --- error! no float support. ---
- #define NUMBERP(x) (FIXNUMP (x))
- #endif
-
- #define EQ(x, y) (XFASTINT (x) == XFASTINT (y))
-
- #ifdef emacs
-
- #define CHECK_LIST(x, i) \
- { if ((!CONSP ((x))) && !NILP (x)) x = wrong_type_argument (Qlistp, (x)); }
-
- #define CHECK_STRING(x, i) \
- { if (!STRINGP ((x))) x = wrong_type_argument (Qstringp, (x)); }
-
- #define CHECK_CONS(x, i) \
- { if (!CONSP ((x))) x = wrong_type_argument (Qconsp, (x)); }
-
- #define CHECK_SYMBOL(x, i) \
- { if (!SYMBOLP ((x))) x = wrong_type_argument (Qsymbolp, (x)); }
-
- #define CHECK_VECTOR(x, i) \
- { if (!VECTORP ((x))) x = wrong_type_argument (Qvectorp, (x)); }
-
- #define CHECK_BUFFER(x, i) \
- { if (!BUFFERP ((x))) x = wrong_type_argument (Qbufferp, (x)); }
-
- #define CHECK_WINDOW(x, i) \
- { if (!WINDOWP ((x))) x = wrong_type_argument (Qwindowp, (x)); }
-
- #define CHECK_EXTENT(x, i) \
- { if (!EXTENTP ((x))) x = wrong_type_argument (Qextentp, (x)); }
-
- #define CHECK_EXTENT_REPLICA(x, i) \
- { if (!EXTENT_REPLICA_P ((x))) \
- x = wrong_type_argument (Qextent_replica_p, (x)); }
-
- #define CHECK_PROCESS(x, i) \
- { if (!PROCESSP ((x))) x = wrong_type_argument (Qprocessp, (x)); }
-
- #define CHECK_EVENT(x, i) \
- { if (!EVENTP ((x))) x = wrong_type_argument (Qeventp, (x)); }
-
- #define CHECK_KEYMAP(x, i) \
- { if (!KEYMAPP ((x))) x = wrong_type_argument (Qkeymapp, (x)); }
-
- #define CHECK_FIXNUM(x, i) \
- { if (!FIXNUMP ((x))) x = wrong_type_argument (Qintegerp, (x)); }
-
- #define CHECK_NUMBER(x, i) \
- { if (!NUMBERP (x)) x = wrong_type_argument (Qnumberp, (x)); }
-
- #define CHECK_NATNUM(x, i) \
- { if (!FIXNUMP ((x)) || XINT ((x)) < 0) \
- x = wrong_type_argument (Qnatnump, (x)); }
-
- #define CHECK_FIXNUM_COERCE_MARKER(x, i) \
- { if (MARKERP ((x))) XFASTINT (x) = marker_position (x); \
- else if (!FIXNUMP ((x))) \
- x = wrong_type_argument (Qinteger_or_marker_p, (x)); }
-
- #define CHECK_NUMBER_COERCE_MARKER(x, i) \
- { if (MARKERP ((x))) XFASTINT (x) = marker_position (x); \
- else if (!NUMBERP ((x))) \
- x = wrong_type_argument (Qnumber_or_marker_p, (x)); }
-
- /* The second check is looking for GCed markers still in use */
- #define CHECK_MARKER(x, i) \
- { if (!MARKERP ((x))) x = wrong_type_argument (Qmarkerp, (x)); \
- if (FIXNUMP (XMARKER ((x))->chain)) abort (); }
-
- #ifdef LISP_FLOAT_TYPE
-
- #ifndef DBL_DIG
- #define DBL_DIG 16
- #endif
-
- #define CHECK_FLOAT(x, i) \
- { if (!FLOATP (x)) x = wrong_type_argument (Qfloatp, (x)); }
-
- #define XFLOATINT(n) extract_float((n))
-
- #else /* Not LISP_FLOAT_TYPE */
-
- #define CHECK_FLOAT(x,i) --- error! no float support. ---
-
- #define XFLOATINT(n) XINT((n))
-
- #endif /* LISP_FLOAT_TYPE */
-
- #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 char 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 char my_edata; \
- if (XPNTR (obj) < (unsigned int) &my_edata) \
- pure_write_error (); }
-
- #endif /* PNTR_COMPARISON_TYPE */
- #endif /* VIRT_ADDRESS_VARIES */
-
- /* 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 (struct Lisp_Subr *);
-
- #define MANY -2
- #define UNEVALLED -1
- #define SUBR_MAX_ARGS 7
-
- extern void defvar_lisp (const char *namestring,
- Lisp_Object *address, const char *doc);
- extern void defvar_lisp_nopro (const char *namestring,
- Lisp_Object *address, const char *doc);
- extern void defvar_bool (const char *namestring,
- int *address, const char *doc);
- extern void defvar_int (const char *namestring,
- int *address, const char *doc);
-
- /* 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, doc)
- #define DEFVARBOOL(lname, vname, doc) defvar_bool (lname, vname, doc)
- #define DEFVARINT(lname, vname, doc) defvar_int (lname, vname, doc)
-
- #define DEFVAR_LISP(lname, vname, doc) defvar_lisp (lname, vname, doc)
- #define DEFVAR_LISP_NOPRO(lname, vname, doc) \
- defvar_lisp_nopro (lname, vname, doc)
- #define DEFVAR_BOOL(lname, vname, doc) defvar_bool (lname, vname, doc)
- #define DEFVAR_INT(lname, vname, doc) defvar_int (lname, vname, doc)
-
- /* 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_depth;
-
- struct handler
- {
- Lisp_Object handlers;
- Lisp_Object handler_arg;
- struct catchtag *tag;
- struct handler *next;
- };
-
- extern struct handler *handlerlist;
-
- /* Check quit-flag and quit if it is non-nil. */
-
- #define QUIT \
- if (!NILP (Vquit_flag) && NILP (Vinhibit_quit)) \
- { Vquit_flag = Qnil; Fsignal (Qquit, Qnil); }
-
- /* Nonzero if ought to quit now. */
-
- #define QUITP (!NILP (Vquit_flag) && NILP (Vinhibit_quit))
-
- /* 1 if CH is upper case. */
-
- #define UPPERCASEP(CH) (XSTRING (current_buffer->downcase_table)->data[CH] != (CH))
-
- /* 1 if CH is lower case. */
-
- #define LOWERCASEP(CH) \
- (!UPPERCASEP (CH) && XSTRING (current_buffer->upcase_table)->data[CH] != (CH))
-
- /* 1 if CH is neither upper nor lower case. */
-
- #define NOCASEP(CH) (XSTRING (current_buffer->upcase_table)->data[CH] == (CH))
-
- /* Upcase a character, or make no change if that cannot be done. */
-
- #define UPCASE(CH) (XSTRING (current_buffer->downcase_table)->data[CH] == (CH) \
- ? UPCASE1 (CH) : (CH))
-
- /* Upcase a character known to be not upper case. */
-
- #define UPCASE1(CH) (XSTRING (current_buffer->upcase_table)->data[CH])
-
- /* Downcase a character, or make no change if that cannot be done. */
-
- #define DOWNCASE(CH) (XSTRING (current_buffer->downcase_table)->data[CH])
-
- /* Current buffer's map from characters to lower-case characters. */
-
- #define DOWNCASE_TABLE XSTRING (current_buffer->downcase_table)->data
-
- /* Table mapping each char to the next char with the same lowercase version.
- This mapping is a no-op only for characters that don't have case. */
- #define UPCASE_TABLE XSTRING (current_buffer->upcase_table)->data
-
- extern Lisp_Object Vascii_downcase_table, Vascii_upcase_table;
-
- /* number of bytes of structure consed since last GC */
-
- extern int consing_since_gc;
-
- /* threshold for doing another gc */
-
- extern int gc_cons_threshold;
-
- /* 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 */
- };
-
- #ifdef DEBUG_GCPRO
-
- extern void debug_gcpro1(), debug_gcpro2(), debug_gcpro3(), debug_gcpro4(),
- debug_ungcpro();
-
- #define GCPRO1(v) \
- debug_gcpro1 (__FILE__, __LINE__,&gcpro1,&v)
- #define GCPRO2(v1,v2) \
- debug_gcpro2 (__FILE__, __LINE__,&gcpro1,&gcpro2,&v1,&v2)
- #define GCPRO3(v1,v2,v3) \
- debug_gcpro3 (__FILE__, __LINE__,&gcpro1,&gcpro2,&gcpro3,&v1,&v2,&v3)
- #define GCPRO4(v1,v2,v3,v4) \
- debug_gcpro4 (__FILE__, __LINE__,&gcpro1,&gcpro2,&gcpro3,&gcpro4,\
- &v1,&v2,&v3,&v4)
- #define UNGCPRO \
- debug_ungcpro(__FILE__, __LINE__,&gcpro1)
-
- #else /* ! DEBUG_GCPRO */
-
- #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; }
-
- #define UNGCPRO (gcprolist = gcpro1.next)
-
- #endif /* ! DEBUG_GCPRO */
-
- /* Evaluate expr, UNGCPRO, and then return the value of expr. */
- #define RETURN_UNGCPRO(expr) \
- do \
- { \
- Lisp_Object ret_ungc_val = (expr); \
- UNGCPRO; \
- return ret_ungc_val; \
- } \
- while (0)
-
- /* Call staticpro (&var) to protect static variable `var'. */
-
- extern void staticpro (Lisp_Object *);
-
- /* 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 */
-
- #include "emacsfns.h"
-
- #endif /* emacs */
-
- #endif /* _EMACS_LISP_H_ */
-