/* Fundamental definitions for GNU Emacs Lisp interpreter.
-Copyright (C) 1985-1987, 1993-1995, 1997-2012 Free Software Foundation, Inc.
+Copyright (C) 1985-1987, 1993-1995, 1997-2013 Free Software Foundation,
+Inc.
This file is part of GNU Emacs.
/* Lisp integers use 2 tags, to give them one extra bit, thus
extending their range from, e.g., -2^28..2^28-1 to -2^29..2^29-1. */
-static EMACS_INT const INTMASK = EMACS_INT_MAX >> (INTTYPEBITS - 1);
+#define INTMASK (EMACS_INT_MAX >> (INTTYPEBITS - 1))
#define case_Lisp_Int case Lisp_Int0: case Lisp_Int1
#define LISP_INT_TAG_P(x) (((x) & ~Lisp_Int1) == 0)
members that are accessible only from C. A Lisp_Misc object is a
wrapper for a C struct that can contain anything you like.
+ Explicit freeing is discouraged for Lisp objects in general. But if
+ you really need to exploit this, use Lisp_Misc (check free_misc in
+ alloc.c to see why). There is no way to free a vectorlike object.
+
To add a new pseudovector type, extend the pvec_type enumeration;
to add a new Lisp_Misc, extend the Lisp_Misc_Type enumeration.
enumeration and a 1-bit GC markbit) and make sure the overall size
of the union is not increased by your addition.
+ For a new pseudovector, it's highly desirable to limit the size
+ of your data type by VBLOCK_BYTES_MAX bytes (defined in alloc.c).
+ Otherwise you will need to change sweep_vectors (also in alloc.c).
+
Then you will need to add switch branches in print.c (in
print_object, to print your object, and possibly also in
print_preprocess) and to alloc.c, to mark your object (in
(XIL ((EMACS_INT) ((EMACS_UINT) (type) << VALBITS) \
+ ((intptr_t) (ptr) & VALMASK)))
-#if DATA_SEG_BITS
/* DATA_SEG_BITS forces extra bits to be or'd in with any pointers
which were stored in a Lisp_Object. */
-#define XPNTR(a) ((uintptr_t) ((XLI (a) & VALMASK)) | DATA_SEG_BITS))
-#else
-#define XPNTR(a) ((uintptr_t) (XLI (a) & VALMASK))
-#endif
+#define XPNTR(a) ((uintptr_t) ((XLI (a) & VALMASK) | DATA_SEG_BITS))
#endif /* not USE_LSB_TAG */
return num < lower ? lower : num <= upper ? num : upper;
}
+\f
/* Extract a value or address from a Lisp_Object. */
#define XCONS(a) (eassert (CONSP (a)), \
#define XMISCTYPE(a) (XMISCANY (a)->type)
#define XMARKER(a) (eassert (MARKERP (a)), &(XMISC (a)->u_marker))
#define XOVERLAY(a) (eassert (OVERLAYP (a)), &(XMISC (a)->u_overlay))
-#define XSAVE_VALUE(a) (eassert (SAVE_VALUEP (a)), &(XMISC (a)->u_save_value))
/* Forwarding object types. */
would expose alloc.c internal details that we'd rather keep
private.
- This is a macro for use in static initializers, and a constant for
- visibility to GDB. The cast to ptrdiff_t ensures that
- the macro is signed. */
-static ptrdiff_t const STRING_BYTES_BOUND =
+ This is a macro for use in static initializers. The cast to
+ ptrdiff_t ensures that the macro is signed. */
#define STRING_BYTES_BOUND \
((ptrdiff_t) min (MOST_POSITIVE_FIXNUM, min (SIZE_MAX, PTRDIFF_MAX) - 1))
- STRING_BYTES_BOUND;
/* Mark STR as a unibyte string. */
#define STRING_SET_UNIBYTE(STR) \
return (x << 4) + (x >> (BITS_PER_EMACS_INT - 4)) + y;
}
+/* Hash X, returning a value that fits into a fixnum. */
+
+LISP_INLINE EMACS_UINT
+SXHASH_REDUCE (EMACS_UINT x)
+{
+ return (x ^ x >> (BITS_PER_EMACS_INT - FIXNUM_BITS)) & INTMASK;
+}
+
/* These structures are used for various misc types. */
struct Lisp_Misc_Any /* Supertype of all Misc types. */
Lisp_Object plist;
};
-/* Hold a C pointer for later use.
- This type of object is used in the arg to record_unwind_protect. */
+/* Types of data which may be saved in a Lisp_Save_Value. */
+
+enum
+ {
+ SAVE_UNUSED,
+ SAVE_INTEGER,
+ SAVE_POINTER,
+ SAVE_OBJECT
+ };
+
+/* Number of bits needed to store one of the above values. */
+enum { SAVE_SLOT_BITS = 2 };
+
+/* Number of slots in a save value where save_type is nonzero. */
+enum { SAVE_VALUE_SLOTS = 4 };
+
+/* Bit-width and values for struct Lisp_Save_Value's save_type member. */
+
+enum { SAVE_TYPE_BITS = SAVE_VALUE_SLOTS * SAVE_SLOT_BITS + 1 };
+
+enum Lisp_Save_Type
+ {
+ SAVE_TYPE_INT_INT = SAVE_INTEGER + (SAVE_INTEGER << SAVE_SLOT_BITS),
+ SAVE_TYPE_INT_INT_INT
+ = (SAVE_INTEGER + (SAVE_TYPE_INT_INT << SAVE_SLOT_BITS)),
+ SAVE_TYPE_OBJ_OBJ = SAVE_OBJECT + (SAVE_OBJECT << SAVE_SLOT_BITS),
+ SAVE_TYPE_OBJ_OBJ_OBJ = SAVE_OBJECT + (SAVE_TYPE_OBJ_OBJ << SAVE_SLOT_BITS),
+ SAVE_TYPE_OBJ_OBJ_OBJ_OBJ
+ = SAVE_OBJECT + (SAVE_TYPE_OBJ_OBJ_OBJ << SAVE_SLOT_BITS),
+ SAVE_TYPE_PTR_INT = SAVE_POINTER + (SAVE_INTEGER << SAVE_SLOT_BITS),
+ SAVE_TYPE_PTR_OBJ = SAVE_POINTER + (SAVE_OBJECT << SAVE_SLOT_BITS),
+ SAVE_TYPE_PTR_PTR = SAVE_POINTER + (SAVE_POINTER << SAVE_SLOT_BITS),
+ SAVE_TYPE_PTR_PTR_OBJ
+ = SAVE_POINTER + (SAVE_TYPE_PTR_OBJ << SAVE_SLOT_BITS),
+
+ /* This has an extra bit indicating it's raw memory. */
+ SAVE_TYPE_MEMORY = SAVE_TYPE_PTR_INT + (1 << (SAVE_TYPE_BITS - 1))
+ };
+
+/* Special object used to hold a different values for later use.
+
+ This is mostly used to package C integers and pointers to call
+ record_unwind_protect. Typical task is to pass just one C pointer
+ to unwind function. You should pack pointer with make_save_pointer
+ and then get it back with XSAVE_POINTER, e.g.:
+
+ ...
+ struct my_data *md = get_my_data ();
+ record_unwind_protect (my_unwind, make_save_pointer (md));
+ ...
+
+ Lisp_Object my_unwind (Lisp_Object arg)
+ {
+ struct my_data *md = XSAVE_POINTER (arg, 0);
+ ...
+ }
+
+ If yon need to pass more than just one C pointer, you should
+ use make_save_value. This function allows you to pack up to
+ SAVE_VALUE_SLOTS integers, pointers or Lisp_Objects and
+ conveniently get them back with XSAVE_POINTER, XSAVE_INTEGER and
+ XSAVE_OBJECT macros:
+
+ ...
+ struct my_data *md = get_my_data ();
+ Lisp_Object my_object = get_my_object ();
+ record_unwind_protect
+ (my_unwind, make_save_value (SAVE_TYPE_PTR_OBJ, md, my_object));
+ ...
+
+ Lisp_Object my_unwind (Lisp_Object arg)
+ {
+ struct my_data *md = XSAVE_POINTER (arg, 0);
+ Lisp_Object my_object = XSAVE_OBJECT (arg, 1);
+ ...
+ }
+
+ If ENABLE_CHECKING is in effect, XSAVE_xxx macros do type checking of the
+ saved objects and raise eassert if type of the saved object doesn't match
+ the type which is extracted. In the example above, XSAVE_INTEGER (arg, 2)
+ or XSAVE_OBJECT (arg, 0) are wrong because nothing was saved in slot 2 and
+ Lisp_Object was saved in slot 1 of ARG. */
+
struct Lisp_Save_Value
{
ENUM_BF (Lisp_Misc_Type) type : 16; /* = Lisp_Misc_Save_Value */
unsigned gcmarkbit : 1;
- int spacer : 14;
- /* If DOGC is set, POINTER is the address of a memory
- area containing INTEGER potential Lisp_Objects. */
- unsigned int dogc : 1;
- void *pointer;
- ptrdiff_t integer;
- };
+ int spacer : 32 - (16 + 1 + SAVE_TYPE_BITS);
+ /* DATA[N] may hold up to SAVE_VALUE_SLOTS entries. The type of
+ V's Ith entry is given by save_type (V, I). E.g., if save_type
+ (V, 3) == SAVE_INTEGER, V->data[3].integer is in use.
+
+ If SAVE_TYPE == SAVE_TYPE_MEMORY, DATA[0].pointer is the address of
+ a memory area containing DATA[1].integer potential Lisp_Objects. */
+ ENUM_BF (Lisp_Save_Type) save_type : SAVE_TYPE_BITS;
+ union {
+ void *pointer;
+ ptrdiff_t integer;
+ Lisp_Object object;
+ } data[SAVE_VALUE_SLOTS];
+ };
/* A miscellaneous object, when it's on the free list. */
struct Lisp_Free
{
enum Lisp_Fwd_Type type; /* = Lisp_Fwd_Buffer_Obj */
int offset;
- Lisp_Object slottype; /* Qnil, Lisp_Int, Lisp_Symbol, or Lisp_String. */
+ /* One of Qnil, Qintegerp, Qsymbolp, Qstringp, Qfloatp or Qnumberp. */
+ Lisp_Object predicate;
};
/* struct Lisp_Buffer_Local_Value is used in a symbol value cell when
#define VECTORP(x) (VECTORLIKEP (x) && !(ASIZE (x) & PSEUDOVECTOR_FLAG))
#define OVERLAYP(x) (MISCP (x) && XMISCTYPE (x) == Lisp_Misc_Overlay)
#define MARKERP(x) (MISCP (x) && XMISCTYPE (x) == Lisp_Misc_Marker)
-#define SAVE_VALUEP(x) (MISCP (x) && XMISCTYPE (x) == Lisp_Misc_Save_Value)
+
+LISP_INLINE bool
+SAVE_VALUEP (Lisp_Object x)
+{
+ return MISCP (x) && XMISCTYPE (x) == Lisp_Misc_Save_Value;
+}
+
+LISP_INLINE struct Lisp_Save_Value *
+XSAVE_VALUE (Lisp_Object a)
+{
+ eassert (SAVE_VALUEP (a));
+ return & XMISC (a)->u_save_value;
+}
+
+/* Return the type of V's Nth saved value. */
+LISP_INLINE int
+save_type (struct Lisp_Save_Value *v, int n)
+{
+ eassert (0 <= n && n < SAVE_VALUE_SLOTS);
+ return (v->save_type >> (SAVE_SLOT_BITS * n) & ((1 << SAVE_SLOT_BITS) - 1));
+}
+
+/* Get and set the Nth saved pointer. */
+
+LISP_INLINE void *
+XSAVE_POINTER (Lisp_Object obj, int n)
+{
+ eassert (save_type (XSAVE_VALUE (obj), n) == SAVE_POINTER);
+ return XSAVE_VALUE (obj)->data[n].pointer;;
+}
+LISP_INLINE void
+set_save_pointer (Lisp_Object obj, int n, void *val)
+{
+ eassert (save_type (XSAVE_VALUE (obj), n) == SAVE_POINTER);
+ XSAVE_VALUE (obj)->data[n].pointer = val;
+}
+
+/* Likewise for the saved integer. */
+
+LISP_INLINE ptrdiff_t
+XSAVE_INTEGER (Lisp_Object obj, int n)
+{
+ eassert (save_type (XSAVE_VALUE (obj), n) == SAVE_INTEGER);
+ return XSAVE_VALUE (obj)->data[n].integer;
+}
+LISP_INLINE void
+set_save_integer (Lisp_Object obj, int n, ptrdiff_t val)
+{
+ eassert (save_type (XSAVE_VALUE (obj), n) == SAVE_INTEGER);
+ XSAVE_VALUE (obj)->data[n].integer = val;
+}
+
+/* Extract Nth saved object. */
+
+LISP_INLINE Lisp_Object
+XSAVE_OBJECT (Lisp_Object obj, int n)
+{
+ eassert (save_type (XSAVE_VALUE (obj), n) == SAVE_OBJECT);
+ return XSAVE_VALUE (obj)->data[n].object;
+}
#define AUTOLOADP(x) (CONSP (x) && EQ (Qautoload, XCAR (x)))
2 Mark the stack, and check that everything GCPRO'd is
marked.
3 Mark using GCPRO's, mark stack last, and count how many
- dead objects are kept alive. */
+ dead objects are kept alive.
+ Formerly, method 0 was used. Currently, method 1 is used unless
+ otherwise specified by hand when building, e.g.,
+ "make CPPFLAGS='-DGC_MARK_STACK=GC_USE_GCPROS_AS_BEFORE'".
+ Methods 2 and 3 are present mainly to debug the transition from 0 to 1. */
#define GC_USE_GCPROS_AS_BEFORE 0
#define GC_MAKE_GCPROS_NOOPS 1
/* Defined in insdel.c. */
extern Lisp_Object Qinhibit_modification_hooks;
-extern void move_gap (ptrdiff_t);
extern void move_gap_both (ptrdiff_t, ptrdiff_t);
extern _Noreturn void buffer_overflow (void);
extern void make_gap (ptrdiff_t);
+extern void make_gap_1 (struct buffer *, ptrdiff_t);
extern ptrdiff_t copy_text (const unsigned char *, unsigned char *,
ptrdiff_t, bool, bool);
extern int count_combining_before (const unsigned char *,
ptrdiff_t, ptrdiff_t, ptrdiff_t);
extern void insert (const char *, ptrdiff_t);
extern void insert_and_inherit (const char *, ptrdiff_t);
-extern void insert_1 (const char *, ptrdiff_t, bool, bool, bool);
extern void insert_1_both (const char *, ptrdiff_t, ptrdiff_t,
bool, bool, bool);
-extern void insert_from_gap (ptrdiff_t, ptrdiff_t);
+extern void insert_from_gap (ptrdiff_t, ptrdiff_t, bool text_at_gap_tail);
extern void insert_from_string (Lisp_Object, ptrdiff_t, ptrdiff_t,
ptrdiff_t, ptrdiff_t, bool);
extern void insert_from_buffer (struct buffer *, ptrdiff_t, ptrdiff_t, bool);
extern void message (const char *, ...) ATTRIBUTE_FORMAT_PRINTF (1, 2);
extern void message1 (const char *);
extern void message1_nolog (const char *);
-extern void message2 (const char *, ptrdiff_t, int);
-extern void message2_nolog (const char *, ptrdiff_t, int);
-extern void message3 (Lisp_Object, ptrdiff_t, int);
-extern void message3_nolog (Lisp_Object, ptrdiff_t, int);
-extern void message_dolog (const char *, ptrdiff_t, int, int);
+extern void message3 (Lisp_Object);
+extern void message3_nolog (Lisp_Object);
+extern void message_dolog (const char *, ptrdiff_t, bool, bool);
extern void message_with_string (const char *, Lisp_Object, int);
extern void message_log_maybe_newline (void);
extern void update_echo_area (void);
/* Defined in alloc.c. */
extern void check_pure_size (void);
+extern void free_misc (Lisp_Object);
extern void allocate_string_data (struct Lisp_String *, EMACS_INT, EMACS_INT);
extern void malloc_warning (const char *);
extern _Noreturn void memory_full (size_t);
Lisp_Object);
enum constype {CONSTYPE_HEAP, CONSTYPE_PURE};
extern Lisp_Object listn (enum constype, ptrdiff_t, Lisp_Object, ...);
+
+/* Build a frequently used 2/3/4-integer lists. */
+
+LISP_INLINE Lisp_Object
+list2i (EMACS_INT x, EMACS_INT y)
+{
+ return list2 (make_number (x), make_number (y));
+}
+
+LISP_INLINE Lisp_Object
+list3i (EMACS_INT x, EMACS_INT y, EMACS_INT w)
+{
+ return list3 (make_number (x), make_number (y), make_number (w));
+}
+
+LISP_INLINE Lisp_Object
+list4i (EMACS_INT x, EMACS_INT y, EMACS_INT w, EMACS_INT h)
+{
+ return list4 (make_number (x), make_number (y),
+ make_number (w), make_number (h));
+}
+
extern _Noreturn void string_overflow (void);
extern Lisp_Object make_string (const char *, ptrdiff_t);
extern Lisp_Object make_formatted_string (char *, const char *, ...)
extern Lisp_Object Qautomatic_gc;
extern Lisp_Object Qchar_table_extra_slots;
extern struct Lisp_Vector *allocate_vector (EMACS_INT);
+
+/* Make an uninitialized vector for SIZE objects. NOTE: you must
+ be sure that GC cannot happen until the vector is completely
+ initialized. E.g. the following code is likely to crash:
+
+ v = make_uninit_vector (3);
+ ASET (v, 0, obj0);
+ ASET (v, 1, Ffunction_can_gc ());
+ ASET (v, 2, obj1); */
+
+LISP_INLINE Lisp_Object
+make_uninit_vector (ptrdiff_t size)
+{
+ Lisp_Object v;
+ struct Lisp_Vector *p;
+
+ p = allocate_vector (size);
+ XSETVECTOR (v, p);
+ return v;
+}
+
extern struct Lisp_Vector *allocate_pseudovector (int, int, enum pvec_type);
#define ALLOCATE_PSEUDOVECTOR(typ,field,tag) \
((typ*) \
extern Lisp_Object make_float (double);
extern void display_malloc_warning (void);
extern ptrdiff_t inhibit_garbage_collection (void);
-extern Lisp_Object make_save_value (void *, ptrdiff_t);
-extern void free_save_value (Lisp_Object);
+extern Lisp_Object make_save_value (enum Lisp_Save_Type, ...);
+extern Lisp_Object make_save_pointer (void *);
extern Lisp_Object build_overlay (Lisp_Object, Lisp_Object, Lisp_Object);
extern void free_marker (Lisp_Object);
extern void free_cons (struct Lisp_Cons *);
(const char *, Lisp_Object (*) (Lisp_Object), Lisp_Object);
enum FLOAT_TO_STRING_BUFSIZE { FLOAT_TO_STRING_BUFSIZE = 350 };
extern int float_to_string (char *, double);
+extern void init_print_once (void);
extern void syms_of_print (void);
/* Defined in doprnt.c. */
extern ptrdiff_t marker_position (Lisp_Object);
extern ptrdiff_t marker_byte_position (Lisp_Object);
extern void clear_charpos_cache (struct buffer *);
-extern ptrdiff_t charpos_to_bytepos (ptrdiff_t);
extern ptrdiff_t buf_charpos_to_bytepos (struct buffer *, ptrdiff_t);
extern ptrdiff_t buf_bytepos_to_charpos (struct buffer *, ptrdiff_t);
extern void unchain_marker (struct Lisp_Marker *marker);
extern Lisp_Object close_file_unwind (Lisp_Object);
extern Lisp_Object restore_point_unwind (Lisp_Object);
extern _Noreturn void report_file_error (const char *, Lisp_Object);
-extern void internal_delete_file (Lisp_Object);
+extern bool internal_delete_file (Lisp_Object);
+extern Lisp_Object emacs_readlinkat (int, const char *);
extern bool file_directory_p (const char *);
extern bool file_accessible_directory_p (const char *);
+extern void init_fileio (void);
extern void syms_of_fileio (void);
extern Lisp_Object make_temp_name (Lisp_Object, bool);
extern Lisp_Object Qdelete_file;
struct re_registers;
extern struct re_pattern_buffer *compile_pattern (Lisp_Object,
struct re_registers *,
- Lisp_Object, int, int);
+ Lisp_Object, bool, bool);
extern ptrdiff_t fast_string_match (Lisp_Object, Lisp_Object);
extern ptrdiff_t fast_c_string_match_ignore_case (Lisp_Object, const char *,
ptrdiff_t);
extern ptrdiff_t fast_string_match_ignore_case (Lisp_Object, Lisp_Object);
extern ptrdiff_t fast_looking_at (Lisp_Object, ptrdiff_t, ptrdiff_t,
ptrdiff_t, ptrdiff_t, Lisp_Object);
-extern ptrdiff_t scan_buffer (int, ptrdiff_t, ptrdiff_t, ptrdiff_t,
- ptrdiff_t *, bool);
+extern ptrdiff_t find_newline (ptrdiff_t, ptrdiff_t, ptrdiff_t, ptrdiff_t,
+ ptrdiff_t, ptrdiff_t *, ptrdiff_t *, bool);
extern EMACS_INT scan_newline (ptrdiff_t, ptrdiff_t, ptrdiff_t, ptrdiff_t,
EMACS_INT, bool);
-extern ptrdiff_t find_next_newline (ptrdiff_t, int);
-extern ptrdiff_t find_next_newline_no_quit (ptrdiff_t, ptrdiff_t);
-extern ptrdiff_t find_before_next_newline (ptrdiff_t, ptrdiff_t, ptrdiff_t);
+extern ptrdiff_t find_newline_no_quit (ptrdiff_t, ptrdiff_t,
+ ptrdiff_t, ptrdiff_t *);
+extern ptrdiff_t find_before_next_newline (ptrdiff_t, ptrdiff_t,
+ ptrdiff_t, ptrdiff_t *);
extern void syms_of_search (void);
extern void clear_regexp_cache (void);
extern Lisp_Object Qminus, Qplus;
extern Lisp_Object Qwhen;
-extern Lisp_Object Qcall_interactively, Qmouse_leave_buffer_hook;
+extern Lisp_Object Qmouse_leave_buffer_hook;
extern void syms_of_callint (void);
/* Defined in casefiddle.c. */
extern void store_frame_param (struct frame *, Lisp_Object, Lisp_Object);
extern void store_in_alist (Lisp_Object *, Lisp_Object, Lisp_Object);
extern Lisp_Object do_switch_frame (Lisp_Object, int, int, Lisp_Object);
-#if HAVE_NS
+#if HAVE_NS || defined(WINDOWSNT)
extern Lisp_Object get_frame_param (struct frame *, Lisp_Object);
#endif
extern void frames_discard_buffer (Lisp_Object);
extern Lisp_Object QCtype, Qlocal;
extern Lisp_Object Qprocessp;
extern void kill_buffer_processes (Lisp_Object);
-extern int wait_reading_process_output (intmax_t, int, int, bool,
- Lisp_Object,
- struct Lisp_Process *,
- int);
+extern bool wait_reading_process_output (intmax_t, int, int, bool,
+ Lisp_Object,
+ struct Lisp_Process *,
+ int);
/* Max value for the first argument of wait_reading_process_output. */
#if __GNUC__ == 3 || (__GNUC__ == 4 && __GNUC_MINOR__ <= 5)
/* Work around a bug in GCC 3.4.2, known to be fixed in GCC 4.6.3.
Lisp_Object, ptrdiff_t, Lisp_Object *);
/* Defined in macros.c. */
-extern Lisp_Object Qexecute_kbd_macro;
extern void init_macros (void);
extern void syms_of_macros (void);
extern void sys_subshell (void);
extern void sys_suspend (void);
extern void discard_tty_input (void);
+extern void block_tty_out_signal (void);
+extern void unblock_tty_out_signal (void);
extern void init_sys_modes (struct tty_display_info *);
extern void reset_sys_modes (struct tty_display_info *);
extern void init_all_sys_modes (void);
extern int emacs_close (int);
extern ptrdiff_t emacs_read (int, char *, ptrdiff_t);
extern ptrdiff_t emacs_write (int, const char *, ptrdiff_t);
-enum { READLINK_BUFSIZE = 1024 };
-extern char *emacs_readlink (const char *, char [READLINK_BUFSIZE]);
extern void unlock_all_files (void);
extern void lock_file (Lisp_Object);
extern void xml_cleanup_parser (void);
#endif
-#ifdef HAVE_MENUS
-/* Defined in (x|w32)fns.c, nsfns.m... */
-extern int have_menus_p (void);
-#endif
-
#ifdef HAVE_DBUS
/* Defined in dbusbind.c. */
void syms_of_dbusbind (void);
/* Set up the name of the machine we're running on. */
extern void init_system_name (void);
-/* We used to use `abs', but that clashes with system headers on some
- platforms, and using a name reserved by Standard C is a bad idea
- anyway. */
-#if !defined (eabs)
+/* Return the absolute value of X. X should be a signed integer
+ expression without side effects, and X's absolute value should not
+ exceed the maximum for its promoted type. This is called 'eabs'
+ because 'abs' is reserved by the C standard. */
#define eabs(x) ((x) < 0 ? -(x) : (x))
-#endif
/* Return a fixnum or float, depending on whether VAL fits in a Lisp
fixnum. */
NITEMS items, each of the same type as *BUF. MULTIPLIER must
positive. The code is tuned for MULTIPLIER being a constant. */
-#define SAFE_NALLOCA(buf, multiplier, nitems) \
- do { \
- if ((nitems) <= MAX_ALLOCA / sizeof *(buf) / (multiplier)) \
- (buf) = alloca (sizeof *(buf) * (multiplier) * (nitems)); \
- else \
+#define SAFE_NALLOCA(buf, multiplier, nitems) \
+ do { \
+ if ((nitems) <= MAX_ALLOCA / sizeof *(buf) / (multiplier)) \
+ (buf) = alloca (sizeof *(buf) * (multiplier) * (nitems)); \
+ else \
{ \
(buf) = xnmalloc (nitems, sizeof *(buf) * (multiplier)); \
sa_must_free = 1; \
record_unwind_protect (safe_alloca_unwind, \
- make_save_value (buf, 0)); \
+ make_save_pointer (buf)); \
} \
} while (0)
{ \
Lisp_Object arg_; \
buf = xmalloc ((nelt) * word_size); \
- arg_ = make_save_value (buf, nelt); \
- XSAVE_VALUE (arg_)->dogc = 1; \
+ arg_ = make_save_value (SAVE_TYPE_MEMORY, buf, nelt); \
sa_must_free = 1; \
record_unwind_protect (safe_alloca_unwind, arg_); \
} \
HCoop / bpt / emacs.git / blobdiff