1 /* Random utility Lisp functions.
3 Copyright (C) 1985-1987, 1993-1995, 1997-2013 Free Software Foundation, Inc.
5 This file is part of GNU Emacs.
7 GNU Emacs is free software: you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation, either version 3 of the License, or
10 (at your option) any later version.
12 GNU Emacs is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with GNU Emacs. If not, see <http://www.gnu.org/licenses/>. */
29 #include "character.h"
34 #include "intervals.h"
37 #include "blockinput.h"
39 #if defined (HAVE_X_WINDOWS)
42 #endif /* HAVE_MENUS */
44 Lisp_Object Qstring_lessp
;
45 static Lisp_Object Qprovide
, Qrequire
;
46 static Lisp_Object Qyes_or_no_p_history
;
47 Lisp_Object Qcursor_in_echo_area
;
48 static Lisp_Object Qwidget_type
;
49 static Lisp_Object Qcodeset
, Qdays
, Qmonths
, Qpaper
;
51 static Lisp_Object Qmd5
, Qsha1
, Qsha224
, Qsha256
, Qsha384
, Qsha512
;
53 static bool internal_equal (Lisp_Object
, Lisp_Object
, int, bool);
55 DEFUN ("identity", Fidentity
, Sidentity
, 1, 1, 0,
56 doc
: /* Return the argument unchanged. */)
62 DEFUN ("random", Frandom
, Srandom
, 0, 1, 0,
63 doc
: /* Return a pseudo-random number.
64 All integers representable in Lisp, i.e. between `most-negative-fixnum'
65 and `most-positive-fixnum', inclusive, are equally likely.
67 With positive integer LIMIT, return random number in interval [0,LIMIT).
68 With argument t, set the random number seed from the current time and pid.
69 With a string argument, set the seed based on the string's contents.
70 Other values of LIMIT are ignored.
72 See Info node `(elisp)Random Numbers' for more details. */)
79 else if (STRINGP (limit
))
80 seed_random (SSDATA (limit
), SBYTES (limit
));
83 if (NATNUMP (limit
) && XFASTINT (limit
) != 0)
84 val
%= XFASTINT (limit
);
85 return make_number (val
);
88 /* Heuristic on how many iterations of a tight loop can be safely done
89 before it's time to do a QUIT. This must be a power of 2. */
90 enum { QUIT_COUNT_HEURISTIC
= 1 << 16 };
92 /* Random data-structure functions. */
94 DEFUN ("length", Flength
, Slength
, 1, 1, 0,
95 doc
: /* Return the length of vector, list or string SEQUENCE.
96 A byte-code function object is also allowed.
97 If the string contains multibyte characters, this is not necessarily
98 the number of bytes in the string; it is the number of characters.
99 To get the number of bytes, use `string-bytes'. */)
100 (register Lisp_Object sequence
)
102 register Lisp_Object val
;
104 if (STRINGP (sequence
))
105 XSETFASTINT (val
, SCHARS (sequence
));
106 else if (VECTORP (sequence
))
107 XSETFASTINT (val
, ASIZE (sequence
));
108 else if (CHAR_TABLE_P (sequence
))
109 XSETFASTINT (val
, MAX_CHAR
);
110 else if (BOOL_VECTOR_P (sequence
))
111 XSETFASTINT (val
, XBOOL_VECTOR (sequence
)->size
);
112 else if (COMPILEDP (sequence
))
113 XSETFASTINT (val
, ASIZE (sequence
) & PSEUDOVECTOR_SIZE_MASK
);
114 else if (CONSP (sequence
))
121 if ((i
& (QUIT_COUNT_HEURISTIC
- 1)) == 0)
123 if (MOST_POSITIVE_FIXNUM
< i
)
124 error ("List too long");
127 sequence
= XCDR (sequence
);
129 while (CONSP (sequence
));
131 CHECK_LIST_END (sequence
, sequence
);
133 val
= make_number (i
);
135 else if (NILP (sequence
))
136 XSETFASTINT (val
, 0);
138 wrong_type_argument (Qsequencep
, sequence
);
143 /* This does not check for quits. That is safe since it must terminate. */
145 DEFUN ("safe-length", Fsafe_length
, Ssafe_length
, 1, 1, 0,
146 doc
: /* Return the length of a list, but avoid error or infinite loop.
147 This function never gets an error. If LIST is not really a list,
148 it returns 0. If LIST is circular, it returns a finite value
149 which is at least the number of distinct elements. */)
152 Lisp_Object tail
, halftail
;
157 return make_number (0);
159 /* halftail is used to detect circular lists. */
160 for (tail
= halftail
= list
; ; )
165 if (EQ (tail
, halftail
))
168 if ((lolen
& 1) == 0)
170 halftail
= XCDR (halftail
);
171 if ((lolen
& (QUIT_COUNT_HEURISTIC
- 1)) == 0)
175 hilen
+= UINTMAX_MAX
+ 1.0;
180 /* If the length does not fit into a fixnum, return a float.
181 On all known practical machines this returns an upper bound on
183 return hilen
? make_float (hilen
+ lolen
) : make_fixnum_or_float (lolen
);
186 DEFUN ("string-bytes", Fstring_bytes
, Sstring_bytes
, 1, 1, 0,
187 doc
: /* Return the number of bytes in STRING.
188 If STRING is multibyte, this may be greater than the length of STRING. */)
191 CHECK_STRING (string
);
192 return make_number (SBYTES (string
));
195 DEFUN ("string-equal", Fstring_equal
, Sstring_equal
, 2, 2, 0,
196 doc
: /* Return t if two strings have identical contents.
197 Case is significant, but text properties are ignored.
198 Symbols are also allowed; their print names are used instead. */)
199 (register Lisp_Object s1
, Lisp_Object s2
)
202 s1
= SYMBOL_NAME (s1
);
204 s2
= SYMBOL_NAME (s2
);
208 if (SCHARS (s1
) != SCHARS (s2
)
209 || SBYTES (s1
) != SBYTES (s2
)
210 || memcmp (SDATA (s1
), SDATA (s2
), SBYTES (s1
)))
215 DEFUN ("compare-strings", Fcompare_strings
, Scompare_strings
, 6, 7, 0,
216 doc
: /* Compare the contents of two strings, converting to multibyte if needed.
217 The arguments START1, END1, START2, and END2, if non-nil, are
218 positions specifying which parts of STR1 or STR2 to compare. In
219 string STR1, compare the part between START1 (inclusive) and END1
220 \(exclusive). If START1 is nil, it defaults to 0, the beginning of
221 the string; if END1 is nil, it defaults to the length of the string.
222 Likewise, in string STR2, compare the part between START2 and END2.
224 The strings are compared by the numeric values of their characters.
225 For instance, STR1 is "less than" STR2 if its first differing
226 character has a smaller numeric value. If IGNORE-CASE is non-nil,
227 characters are converted to lower-case before comparing them. Unibyte
228 strings are converted to multibyte for comparison.
230 The value is t if the strings (or specified portions) match.
231 If string STR1 is less, the value is a negative number N;
232 - 1 - N is the number of characters that match at the beginning.
233 If string STR1 is greater, the value is a positive number N;
234 N - 1 is the number of characters that match at the beginning. */)
235 (Lisp_Object str1
, Lisp_Object start1
, Lisp_Object end1
, Lisp_Object str2
, Lisp_Object start2
, Lisp_Object end2
, Lisp_Object ignore_case
)
237 register ptrdiff_t end1_char
, end2_char
;
238 register ptrdiff_t i1
, i1_byte
, i2
, i2_byte
;
243 start1
= make_number (0);
245 start2
= make_number (0);
246 CHECK_NATNUM (start1
);
247 CHECK_NATNUM (start2
);
253 end1_char
= SCHARS (str1
);
254 if (! NILP (end1
) && end1_char
> XINT (end1
))
255 end1_char
= XINT (end1
);
256 if (end1_char
< XINT (start1
))
257 args_out_of_range (str1
, start1
);
259 end2_char
= SCHARS (str2
);
260 if (! NILP (end2
) && end2_char
> XINT (end2
))
261 end2_char
= XINT (end2
);
262 if (end2_char
< XINT (start2
))
263 args_out_of_range (str2
, start2
);
268 i1_byte
= string_char_to_byte (str1
, i1
);
269 i2_byte
= string_char_to_byte (str2
, i2
);
271 while (i1
< end1_char
&& i2
< end2_char
)
273 /* When we find a mismatch, we must compare the
274 characters, not just the bytes. */
277 if (STRING_MULTIBYTE (str1
))
278 FETCH_STRING_CHAR_ADVANCE_NO_CHECK (c1
, str1
, i1
, i1_byte
);
281 c1
= SREF (str1
, i1
++);
282 MAKE_CHAR_MULTIBYTE (c1
);
285 if (STRING_MULTIBYTE (str2
))
286 FETCH_STRING_CHAR_ADVANCE_NO_CHECK (c2
, str2
, i2
, i2_byte
);
289 c2
= SREF (str2
, i2
++);
290 MAKE_CHAR_MULTIBYTE (c2
);
296 if (! NILP (ignore_case
))
300 tem
= Fupcase (make_number (c1
));
302 tem
= Fupcase (make_number (c2
));
309 /* Note that I1 has already been incremented
310 past the character that we are comparing;
311 hence we don't add or subtract 1 here. */
313 return make_number (- i1
+ XINT (start1
));
315 return make_number (i1
- XINT (start1
));
319 return make_number (i1
- XINT (start1
) + 1);
321 return make_number (- i1
+ XINT (start1
) - 1);
326 DEFUN ("string-lessp", Fstring_lessp
, Sstring_lessp
, 2, 2, 0,
327 doc
: /* Return t if first arg string is less than second in lexicographic order.
329 Symbols are also allowed; their print names are used instead. */)
330 (register Lisp_Object s1
, Lisp_Object s2
)
332 register ptrdiff_t end
;
333 register ptrdiff_t i1
, i1_byte
, i2
, i2_byte
;
336 s1
= SYMBOL_NAME (s1
);
338 s2
= SYMBOL_NAME (s2
);
342 i1
= i1_byte
= i2
= i2_byte
= 0;
345 if (end
> SCHARS (s2
))
350 /* When we find a mismatch, we must compare the
351 characters, not just the bytes. */
354 FETCH_STRING_CHAR_ADVANCE (c1
, s1
, i1
, i1_byte
);
355 FETCH_STRING_CHAR_ADVANCE (c2
, s2
, i2
, i2_byte
);
358 return c1
< c2
? Qt
: Qnil
;
360 return i1
< SCHARS (s2
) ? Qt
: Qnil
;
363 static Lisp_Object
concat (ptrdiff_t nargs
, Lisp_Object
*args
,
364 enum Lisp_Type target_type
, bool last_special
);
368 concat2 (Lisp_Object s1
, Lisp_Object s2
)
373 return concat (2, args
, Lisp_String
, 0);
378 concat3 (Lisp_Object s1
, Lisp_Object s2
, Lisp_Object s3
)
384 return concat (3, args
, Lisp_String
, 0);
387 DEFUN ("append", Fappend
, Sappend
, 0, MANY
, 0,
388 doc
: /* Concatenate all the arguments and make the result a list.
389 The result is a list whose elements are the elements of all the arguments.
390 Each argument may be a list, vector or string.
391 The last argument is not copied, just used as the tail of the new list.
392 usage: (append &rest SEQUENCES) */)
393 (ptrdiff_t nargs
, Lisp_Object
*args
)
395 return concat (nargs
, args
, Lisp_Cons
, 1);
398 DEFUN ("concat", Fconcat
, Sconcat
, 0, MANY
, 0,
399 doc
: /* Concatenate all the arguments and make the result a string.
400 The result is a string whose elements are the elements of all the arguments.
401 Each argument may be a string or a list or vector of characters (integers).
402 usage: (concat &rest SEQUENCES) */)
403 (ptrdiff_t nargs
, Lisp_Object
*args
)
405 return concat (nargs
, args
, Lisp_String
, 0);
408 DEFUN ("vconcat", Fvconcat
, Svconcat
, 0, MANY
, 0,
409 doc
: /* Concatenate all the arguments and make the result a vector.
410 The result is a vector whose elements are the elements of all the arguments.
411 Each argument may be a list, vector or string.
412 usage: (vconcat &rest SEQUENCES) */)
413 (ptrdiff_t nargs
, Lisp_Object
*args
)
415 return concat (nargs
, args
, Lisp_Vectorlike
, 0);
419 DEFUN ("copy-sequence", Fcopy_sequence
, Scopy_sequence
, 1, 1, 0,
420 doc
: /* Return a copy of a list, vector, string or char-table.
421 The elements of a list or vector are not copied; they are shared
422 with the original. */)
425 if (NILP (arg
)) return arg
;
427 if (CHAR_TABLE_P (arg
))
429 return copy_char_table (arg
);
432 if (BOOL_VECTOR_P (arg
))
435 ptrdiff_t size_in_chars
436 = ((XBOOL_VECTOR (arg
)->size
+ BOOL_VECTOR_BITS_PER_CHAR
- 1)
437 / BOOL_VECTOR_BITS_PER_CHAR
);
439 val
= Fmake_bool_vector (Flength (arg
), Qnil
);
440 memcpy (XBOOL_VECTOR (val
)->data
, XBOOL_VECTOR (arg
)->data
,
445 if (!CONSP (arg
) && !VECTORP (arg
) && !STRINGP (arg
))
446 wrong_type_argument (Qsequencep
, arg
);
448 return concat (1, &arg
, CONSP (arg
) ? Lisp_Cons
: XTYPE (arg
), 0);
451 /* This structure holds information of an argument of `concat' that is
452 a string and has text properties to be copied. */
455 ptrdiff_t argnum
; /* refer to ARGS (arguments of `concat') */
456 ptrdiff_t from
; /* refer to ARGS[argnum] (argument string) */
457 ptrdiff_t to
; /* refer to VAL (the target string) */
461 concat (ptrdiff_t nargs
, Lisp_Object
*args
,
462 enum Lisp_Type target_type
, bool last_special
)
468 ptrdiff_t toindex_byte
= 0;
469 EMACS_INT result_len
;
470 EMACS_INT result_len_byte
;
472 Lisp_Object last_tail
;
475 /* When we make a multibyte string, we can't copy text properties
476 while concatenating each string because the length of resulting
477 string can't be decided until we finish the whole concatenation.
478 So, we record strings that have text properties to be copied
479 here, and copy the text properties after the concatenation. */
480 struct textprop_rec
*textprops
= NULL
;
481 /* Number of elements in textprops. */
482 ptrdiff_t num_textprops
= 0;
487 /* In append, the last arg isn't treated like the others */
488 if (last_special
&& nargs
> 0)
491 last_tail
= args
[nargs
];
496 /* Check each argument. */
497 for (argnum
= 0; argnum
< nargs
; argnum
++)
500 if (!(CONSP (this) || NILP (this) || VECTORP (this) || STRINGP (this)
501 || COMPILEDP (this) || BOOL_VECTOR_P (this)))
502 wrong_type_argument (Qsequencep
, this);
505 /* Compute total length in chars of arguments in RESULT_LEN.
506 If desired output is a string, also compute length in bytes
507 in RESULT_LEN_BYTE, and determine in SOME_MULTIBYTE
508 whether the result should be a multibyte string. */
512 for (argnum
= 0; argnum
< nargs
; argnum
++)
516 len
= XFASTINT (Flength (this));
517 if (target_type
== Lisp_String
)
519 /* We must count the number of bytes needed in the string
520 as well as the number of characters. */
524 ptrdiff_t this_len_byte
;
526 if (VECTORP (this) || COMPILEDP (this))
527 for (i
= 0; i
< len
; i
++)
530 CHECK_CHARACTER (ch
);
532 this_len_byte
= CHAR_BYTES (c
);
533 if (STRING_BYTES_BOUND
- result_len_byte
< this_len_byte
)
535 result_len_byte
+= this_len_byte
;
536 if (! ASCII_CHAR_P (c
) && ! CHAR_BYTE8_P (c
))
539 else if (BOOL_VECTOR_P (this) && XBOOL_VECTOR (this)->size
> 0)
540 wrong_type_argument (Qintegerp
, Faref (this, make_number (0)));
541 else if (CONSP (this))
542 for (; CONSP (this); this = XCDR (this))
545 CHECK_CHARACTER (ch
);
547 this_len_byte
= CHAR_BYTES (c
);
548 if (STRING_BYTES_BOUND
- result_len_byte
< this_len_byte
)
550 result_len_byte
+= this_len_byte
;
551 if (! ASCII_CHAR_P (c
) && ! CHAR_BYTE8_P (c
))
554 else if (STRINGP (this))
556 if (STRING_MULTIBYTE (this))
559 this_len_byte
= SBYTES (this);
562 this_len_byte
= count_size_as_multibyte (SDATA (this),
564 if (STRING_BYTES_BOUND
- result_len_byte
< this_len_byte
)
566 result_len_byte
+= this_len_byte
;
571 if (MOST_POSITIVE_FIXNUM
< result_len
)
572 memory_full (SIZE_MAX
);
575 if (! some_multibyte
)
576 result_len_byte
= result_len
;
578 /* Create the output object. */
579 if (target_type
== Lisp_Cons
)
580 val
= Fmake_list (make_number (result_len
), Qnil
);
581 else if (target_type
== Lisp_Vectorlike
)
582 val
= Fmake_vector (make_number (result_len
), Qnil
);
583 else if (some_multibyte
)
584 val
= make_uninit_multibyte_string (result_len
, result_len_byte
);
586 val
= make_uninit_string (result_len
);
588 /* In `append', if all but last arg are nil, return last arg. */
589 if (target_type
== Lisp_Cons
&& EQ (val
, Qnil
))
592 /* Copy the contents of the args into the result. */
594 tail
= val
, toindex
= -1; /* -1 in toindex is flag we are making a list */
596 toindex
= 0, toindex_byte
= 0;
600 SAFE_NALLOCA (textprops
, 1, nargs
);
602 for (argnum
= 0; argnum
< nargs
; argnum
++)
605 ptrdiff_t thisleni
= 0;
606 register ptrdiff_t thisindex
= 0;
607 register ptrdiff_t thisindex_byte
= 0;
611 thislen
= Flength (this), thisleni
= XINT (thislen
);
613 /* Between strings of the same kind, copy fast. */
614 if (STRINGP (this) && STRINGP (val
)
615 && STRING_MULTIBYTE (this) == some_multibyte
)
617 ptrdiff_t thislen_byte
= SBYTES (this);
619 memcpy (SDATA (val
) + toindex_byte
, SDATA (this), SBYTES (this));
620 if (string_intervals (this))
622 textprops
[num_textprops
].argnum
= argnum
;
623 textprops
[num_textprops
].from
= 0;
624 textprops
[num_textprops
++].to
= toindex
;
626 toindex_byte
+= thislen_byte
;
629 /* Copy a single-byte string to a multibyte string. */
630 else if (STRINGP (this) && STRINGP (val
))
632 if (string_intervals (this))
634 textprops
[num_textprops
].argnum
= argnum
;
635 textprops
[num_textprops
].from
= 0;
636 textprops
[num_textprops
++].to
= toindex
;
638 toindex_byte
+= copy_text (SDATA (this),
639 SDATA (val
) + toindex_byte
,
640 SCHARS (this), 0, 1);
644 /* Copy element by element. */
647 register Lisp_Object elt
;
649 /* Fetch next element of `this' arg into `elt', or break if
650 `this' is exhausted. */
651 if (NILP (this)) break;
653 elt
= XCAR (this), this = XCDR (this);
654 else if (thisindex
>= thisleni
)
656 else if (STRINGP (this))
659 if (STRING_MULTIBYTE (this))
660 FETCH_STRING_CHAR_ADVANCE_NO_CHECK (c
, this,
665 c
= SREF (this, thisindex
); thisindex
++;
666 if (some_multibyte
&& !ASCII_CHAR_P (c
))
667 c
= BYTE8_TO_CHAR (c
);
669 XSETFASTINT (elt
, c
);
671 else if (BOOL_VECTOR_P (this))
674 byte
= XBOOL_VECTOR (this)->data
[thisindex
/ BOOL_VECTOR_BITS_PER_CHAR
];
675 if (byte
& (1 << (thisindex
% BOOL_VECTOR_BITS_PER_CHAR
)))
683 elt
= AREF (this, thisindex
);
687 /* Store this element into the result. */
694 else if (VECTORP (val
))
696 ASET (val
, toindex
, elt
);
702 CHECK_CHARACTER (elt
);
705 toindex_byte
+= CHAR_STRING (c
, SDATA (val
) + toindex_byte
);
707 SSET (val
, toindex_byte
++, c
);
713 XSETCDR (prev
, last_tail
);
715 if (num_textprops
> 0)
718 ptrdiff_t last_to_end
= -1;
720 for (argnum
= 0; argnum
< num_textprops
; argnum
++)
722 this = args
[textprops
[argnum
].argnum
];
723 props
= text_property_list (this,
725 make_number (SCHARS (this)),
727 /* If successive arguments have properties, be sure that the
728 value of `composition' property be the copy. */
729 if (last_to_end
== textprops
[argnum
].to
)
730 make_composition_value_copy (props
);
731 add_text_properties_from_list (val
, props
,
732 make_number (textprops
[argnum
].to
));
733 last_to_end
= textprops
[argnum
].to
+ SCHARS (this);
741 static Lisp_Object string_char_byte_cache_string
;
742 static ptrdiff_t string_char_byte_cache_charpos
;
743 static ptrdiff_t string_char_byte_cache_bytepos
;
746 clear_string_char_byte_cache (void)
748 string_char_byte_cache_string
= Qnil
;
751 /* Return the byte index corresponding to CHAR_INDEX in STRING. */
754 string_char_to_byte (Lisp_Object string
, ptrdiff_t char_index
)
757 ptrdiff_t best_below
, best_below_byte
;
758 ptrdiff_t best_above
, best_above_byte
;
760 best_below
= best_below_byte
= 0;
761 best_above
= SCHARS (string
);
762 best_above_byte
= SBYTES (string
);
763 if (best_above
== best_above_byte
)
766 if (EQ (string
, string_char_byte_cache_string
))
768 if (string_char_byte_cache_charpos
< char_index
)
770 best_below
= string_char_byte_cache_charpos
;
771 best_below_byte
= string_char_byte_cache_bytepos
;
775 best_above
= string_char_byte_cache_charpos
;
776 best_above_byte
= string_char_byte_cache_bytepos
;
780 if (char_index
- best_below
< best_above
- char_index
)
782 unsigned char *p
= SDATA (string
) + best_below_byte
;
784 while (best_below
< char_index
)
786 p
+= BYTES_BY_CHAR_HEAD (*p
);
789 i_byte
= p
- SDATA (string
);
793 unsigned char *p
= SDATA (string
) + best_above_byte
;
795 while (best_above
> char_index
)
798 while (!CHAR_HEAD_P (*p
)) p
--;
801 i_byte
= p
- SDATA (string
);
804 string_char_byte_cache_bytepos
= i_byte
;
805 string_char_byte_cache_charpos
= char_index
;
806 string_char_byte_cache_string
= string
;
811 /* Return the character index corresponding to BYTE_INDEX in STRING. */
814 string_byte_to_char (Lisp_Object string
, ptrdiff_t byte_index
)
817 ptrdiff_t best_below
, best_below_byte
;
818 ptrdiff_t best_above
, best_above_byte
;
820 best_below
= best_below_byte
= 0;
821 best_above
= SCHARS (string
);
822 best_above_byte
= SBYTES (string
);
823 if (best_above
== best_above_byte
)
826 if (EQ (string
, string_char_byte_cache_string
))
828 if (string_char_byte_cache_bytepos
< byte_index
)
830 best_below
= string_char_byte_cache_charpos
;
831 best_below_byte
= string_char_byte_cache_bytepos
;
835 best_above
= string_char_byte_cache_charpos
;
836 best_above_byte
= string_char_byte_cache_bytepos
;
840 if (byte_index
- best_below_byte
< best_above_byte
- byte_index
)
842 unsigned char *p
= SDATA (string
) + best_below_byte
;
843 unsigned char *pend
= SDATA (string
) + byte_index
;
847 p
+= BYTES_BY_CHAR_HEAD (*p
);
851 i_byte
= p
- SDATA (string
);
855 unsigned char *p
= SDATA (string
) + best_above_byte
;
856 unsigned char *pbeg
= SDATA (string
) + byte_index
;
861 while (!CHAR_HEAD_P (*p
)) p
--;
865 i_byte
= p
- SDATA (string
);
868 string_char_byte_cache_bytepos
= i_byte
;
869 string_char_byte_cache_charpos
= i
;
870 string_char_byte_cache_string
= string
;
875 /* Convert STRING to a multibyte string. */
878 string_make_multibyte (Lisp_Object string
)
885 if (STRING_MULTIBYTE (string
))
888 nbytes
= count_size_as_multibyte (SDATA (string
),
890 /* If all the chars are ASCII, they won't need any more bytes
891 once converted. In that case, we can return STRING itself. */
892 if (nbytes
== SBYTES (string
))
895 buf
= SAFE_ALLOCA (nbytes
);
896 copy_text (SDATA (string
), buf
, SBYTES (string
),
899 ret
= make_multibyte_string ((char *) buf
, SCHARS (string
), nbytes
);
906 /* Convert STRING (if unibyte) to a multibyte string without changing
907 the number of characters. Characters 0200 trough 0237 are
908 converted to eight-bit characters. */
911 string_to_multibyte (Lisp_Object string
)
918 if (STRING_MULTIBYTE (string
))
921 nbytes
= count_size_as_multibyte (SDATA (string
), SBYTES (string
));
922 /* If all the chars are ASCII, they won't need any more bytes once
924 if (nbytes
== SBYTES (string
))
925 return make_multibyte_string (SSDATA (string
), nbytes
, nbytes
);
927 buf
= SAFE_ALLOCA (nbytes
);
928 memcpy (buf
, SDATA (string
), SBYTES (string
));
929 str_to_multibyte (buf
, nbytes
, SBYTES (string
));
931 ret
= make_multibyte_string ((char *) buf
, SCHARS (string
), nbytes
);
938 /* Convert STRING to a single-byte string. */
941 string_make_unibyte (Lisp_Object string
)
948 if (! STRING_MULTIBYTE (string
))
951 nchars
= SCHARS (string
);
953 buf
= SAFE_ALLOCA (nchars
);
954 copy_text (SDATA (string
), buf
, SBYTES (string
),
957 ret
= make_unibyte_string ((char *) buf
, nchars
);
963 DEFUN ("string-make-multibyte", Fstring_make_multibyte
, Sstring_make_multibyte
,
965 doc
: /* Return the multibyte equivalent of STRING.
966 If STRING is unibyte and contains non-ASCII characters, the function
967 `unibyte-char-to-multibyte' is used to convert each unibyte character
968 to a multibyte character. In this case, the returned string is a
969 newly created string with no text properties. If STRING is multibyte
970 or entirely ASCII, it is returned unchanged. In particular, when
971 STRING is unibyte and entirely ASCII, the returned string is unibyte.
972 \(When the characters are all ASCII, Emacs primitives will treat the
973 string the same way whether it is unibyte or multibyte.) */)
976 CHECK_STRING (string
);
978 return string_make_multibyte (string
);
981 DEFUN ("string-make-unibyte", Fstring_make_unibyte
, Sstring_make_unibyte
,
983 doc
: /* Return the unibyte equivalent of STRING.
984 Multibyte character codes are converted to unibyte according to
985 `nonascii-translation-table' or, if that is nil, `nonascii-insert-offset'.
986 If the lookup in the translation table fails, this function takes just
987 the low 8 bits of each character. */)
990 CHECK_STRING (string
);
992 return string_make_unibyte (string
);
995 DEFUN ("string-as-unibyte", Fstring_as_unibyte
, Sstring_as_unibyte
,
997 doc
: /* Return a unibyte string with the same individual bytes as STRING.
998 If STRING is unibyte, the result is STRING itself.
999 Otherwise it is a newly created string, with no text properties.
1000 If STRING is multibyte and contains a character of charset
1001 `eight-bit', it is converted to the corresponding single byte. */)
1002 (Lisp_Object string
)
1004 CHECK_STRING (string
);
1006 if (STRING_MULTIBYTE (string
))
1008 ptrdiff_t bytes
= SBYTES (string
);
1009 unsigned char *str
= xmalloc (bytes
);
1011 memcpy (str
, SDATA (string
), bytes
);
1012 bytes
= str_as_unibyte (str
, bytes
);
1013 string
= make_unibyte_string ((char *) str
, bytes
);
1019 DEFUN ("string-as-multibyte", Fstring_as_multibyte
, Sstring_as_multibyte
,
1021 doc
: /* Return a multibyte string with the same individual bytes as STRING.
1022 If STRING is multibyte, the result is STRING itself.
1023 Otherwise it is a newly created string, with no text properties.
1025 If STRING is unibyte and contains an individual 8-bit byte (i.e. not
1026 part of a correct utf-8 sequence), it is converted to the corresponding
1027 multibyte character of charset `eight-bit'.
1028 See also `string-to-multibyte'.
1030 Beware, this often doesn't really do what you think it does.
1031 It is similar to (decode-coding-string STRING 'utf-8-emacs).
1032 If you're not sure, whether to use `string-as-multibyte' or
1033 `string-to-multibyte', use `string-to-multibyte'. */)
1034 (Lisp_Object string
)
1036 CHECK_STRING (string
);
1038 if (! STRING_MULTIBYTE (string
))
1040 Lisp_Object new_string
;
1041 ptrdiff_t nchars
, nbytes
;
1043 parse_str_as_multibyte (SDATA (string
),
1046 new_string
= make_uninit_multibyte_string (nchars
, nbytes
);
1047 memcpy (SDATA (new_string
), SDATA (string
), SBYTES (string
));
1048 if (nbytes
!= SBYTES (string
))
1049 str_as_multibyte (SDATA (new_string
), nbytes
,
1050 SBYTES (string
), NULL
);
1051 string
= new_string
;
1052 set_string_intervals (string
, NULL
);
1057 DEFUN ("string-to-multibyte", Fstring_to_multibyte
, Sstring_to_multibyte
,
1059 doc
: /* Return a multibyte string with the same individual chars as STRING.
1060 If STRING is multibyte, the result is STRING itself.
1061 Otherwise it is a newly created string, with no text properties.
1063 If STRING is unibyte and contains an 8-bit byte, it is converted to
1064 the corresponding multibyte character of charset `eight-bit'.
1066 This differs from `string-as-multibyte' by converting each byte of a correct
1067 utf-8 sequence to an eight-bit character, not just bytes that don't form a
1068 correct sequence. */)
1069 (Lisp_Object string
)
1071 CHECK_STRING (string
);
1073 return string_to_multibyte (string
);
1076 DEFUN ("string-to-unibyte", Fstring_to_unibyte
, Sstring_to_unibyte
,
1078 doc
: /* Return a unibyte string with the same individual chars as STRING.
1079 If STRING is unibyte, the result is STRING itself.
1080 Otherwise it is a newly created string, with no text properties,
1081 where each `eight-bit' character is converted to the corresponding byte.
1082 If STRING contains a non-ASCII, non-`eight-bit' character,
1083 an error is signaled. */)
1084 (Lisp_Object string
)
1086 CHECK_STRING (string
);
1088 if (STRING_MULTIBYTE (string
))
1090 ptrdiff_t chars
= SCHARS (string
);
1091 unsigned char *str
= xmalloc (chars
);
1092 ptrdiff_t converted
= str_to_unibyte (SDATA (string
), str
, chars
);
1094 if (converted
< chars
)
1095 error ("Can't convert the %"pD
"dth character to unibyte", converted
);
1096 string
= make_unibyte_string ((char *) str
, chars
);
1103 DEFUN ("copy-alist", Fcopy_alist
, Scopy_alist
, 1, 1, 0,
1104 doc
: /* Return a copy of ALIST.
1105 This is an alist which represents the same mapping from objects to objects,
1106 but does not share the alist structure with ALIST.
1107 The objects mapped (cars and cdrs of elements of the alist)
1108 are shared, however.
1109 Elements of ALIST that are not conses are also shared. */)
1112 register Lisp_Object tem
;
1117 alist
= concat (1, &alist
, Lisp_Cons
, 0);
1118 for (tem
= alist
; CONSP (tem
); tem
= XCDR (tem
))
1120 register Lisp_Object car
;
1124 XSETCAR (tem
, Fcons (XCAR (car
), XCDR (car
)));
1129 DEFUN ("substring", Fsubstring
, Ssubstring
, 2, 3, 0,
1130 doc
: /* Return a new string whose contents are a substring of STRING.
1131 The returned string consists of the characters between index FROM
1132 \(inclusive) and index TO (exclusive) of STRING. FROM and TO are
1133 zero-indexed: 0 means the first character of STRING. Negative values
1134 are counted from the end of STRING. If TO is nil, the substring runs
1135 to the end of STRING.
1137 The STRING argument may also be a vector. In that case, the return
1138 value is a new vector that contains the elements between index FROM
1139 \(inclusive) and index TO (exclusive) of that vector argument. */)
1140 (Lisp_Object string
, register Lisp_Object from
, Lisp_Object to
)
1144 EMACS_INT from_char
, to_char
;
1146 CHECK_VECTOR_OR_STRING (string
);
1147 CHECK_NUMBER (from
);
1149 if (STRINGP (string
))
1150 size
= SCHARS (string
);
1152 size
= ASIZE (string
);
1160 to_char
= XINT (to
);
1165 from_char
= XINT (from
);
1168 if (!(0 <= from_char
&& from_char
<= to_char
&& to_char
<= size
))
1169 args_out_of_range_3 (string
, make_number (from_char
),
1170 make_number (to_char
));
1172 if (STRINGP (string
))
1175 (NILP (to
) ? SBYTES (string
) : string_char_to_byte (string
, to_char
));
1176 ptrdiff_t from_byte
= string_char_to_byte (string
, from_char
);
1177 res
= make_specified_string (SSDATA (string
) + from_byte
,
1178 to_char
- from_char
, to_byte
- from_byte
,
1179 STRING_MULTIBYTE (string
));
1180 copy_text_properties (make_number (from_char
), make_number (to_char
),
1181 string
, make_number (0), res
, Qnil
);
1184 res
= Fvector (to_char
- from_char
, aref_addr (string
, from_char
));
1190 DEFUN ("substring-no-properties", Fsubstring_no_properties
, Ssubstring_no_properties
, 1, 3, 0,
1191 doc
: /* Return a substring of STRING, without text properties.
1192 It starts at index FROM and ends before TO.
1193 TO may be nil or omitted; then the substring runs to the end of STRING.
1194 If FROM is nil or omitted, the substring starts at the beginning of STRING.
1195 If FROM or TO is negative, it counts from the end.
1197 With one argument, just copy STRING without its properties. */)
1198 (Lisp_Object string
, register Lisp_Object from
, Lisp_Object to
)
1201 EMACS_INT from_char
, to_char
;
1202 ptrdiff_t from_byte
, to_byte
;
1204 CHECK_STRING (string
);
1206 size
= SCHARS (string
);
1212 CHECK_NUMBER (from
);
1213 from_char
= XINT (from
);
1223 to_char
= XINT (to
);
1228 if (!(0 <= from_char
&& from_char
<= to_char
&& to_char
<= size
))
1229 args_out_of_range_3 (string
, make_number (from_char
),
1230 make_number (to_char
));
1232 from_byte
= NILP (from
) ? 0 : string_char_to_byte (string
, from_char
);
1234 NILP (to
) ? SBYTES (string
) : string_char_to_byte (string
, to_char
);
1235 return make_specified_string (SSDATA (string
) + from_byte
,
1236 to_char
- from_char
, to_byte
- from_byte
,
1237 STRING_MULTIBYTE (string
));
1240 /* Extract a substring of STRING, giving start and end positions
1241 both in characters and in bytes. */
1244 substring_both (Lisp_Object string
, ptrdiff_t from
, ptrdiff_t from_byte
,
1245 ptrdiff_t to
, ptrdiff_t to_byte
)
1250 CHECK_VECTOR_OR_STRING (string
);
1252 size
= STRINGP (string
) ? SCHARS (string
) : ASIZE (string
);
1254 if (!(0 <= from
&& from
<= to
&& to
<= size
))
1255 args_out_of_range_3 (string
, make_number (from
), make_number (to
));
1257 if (STRINGP (string
))
1259 res
= make_specified_string (SSDATA (string
) + from_byte
,
1260 to
- from
, to_byte
- from_byte
,
1261 STRING_MULTIBYTE (string
));
1262 copy_text_properties (make_number (from
), make_number (to
),
1263 string
, make_number (0), res
, Qnil
);
1266 res
= Fvector (to
- from
, aref_addr (string
, from
));
1271 DEFUN ("nthcdr", Fnthcdr
, Snthcdr
, 2, 2, 0,
1272 doc
: /* Take cdr N times on LIST, return the result. */)
1273 (Lisp_Object n
, Lisp_Object list
)
1278 for (i
= 0; i
< num
&& !NILP (list
); i
++)
1281 CHECK_LIST_CONS (list
, list
);
1287 DEFUN ("nth", Fnth
, Snth
, 2, 2, 0,
1288 doc
: /* Return the Nth element of LIST.
1289 N counts from zero. If LIST is not that long, nil is returned. */)
1290 (Lisp_Object n
, Lisp_Object list
)
1292 return Fcar (Fnthcdr (n
, list
));
1295 DEFUN ("elt", Felt
, Selt
, 2, 2, 0,
1296 doc
: /* Return element of SEQUENCE at index N. */)
1297 (register Lisp_Object sequence
, Lisp_Object n
)
1300 if (CONSP (sequence
) || NILP (sequence
))
1301 return Fcar (Fnthcdr (n
, sequence
));
1303 /* Faref signals a "not array" error, so check here. */
1304 CHECK_ARRAY (sequence
, Qsequencep
);
1305 return Faref (sequence
, n
);
1308 DEFUN ("member", Fmember
, Smember
, 2, 2, 0,
1309 doc
: /* Return non-nil if ELT is an element of LIST. Comparison done with `equal'.
1310 The value is actually the tail of LIST whose car is ELT. */)
1311 (register Lisp_Object elt
, Lisp_Object list
)
1313 register Lisp_Object tail
;
1314 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
1316 register Lisp_Object tem
;
1317 CHECK_LIST_CONS (tail
, list
);
1319 if (! NILP (Fequal (elt
, tem
)))
1326 DEFUN ("memq", Fmemq
, Smemq
, 2, 2, 0,
1327 doc
: /* Return non-nil if ELT is an element of LIST. Comparison done with `eq'.
1328 The value is actually the tail of LIST whose car is ELT. */)
1329 (register Lisp_Object elt
, Lisp_Object list
)
1333 if (!CONSP (list
) || EQ (XCAR (list
), elt
))
1337 if (!CONSP (list
) || EQ (XCAR (list
), elt
))
1341 if (!CONSP (list
) || EQ (XCAR (list
), elt
))
1352 DEFUN ("memql", Fmemql
, Smemql
, 2, 2, 0,
1353 doc
: /* Return non-nil if ELT is an element of LIST. Comparison done with `eql'.
1354 The value is actually the tail of LIST whose car is ELT. */)
1355 (register Lisp_Object elt
, Lisp_Object list
)
1357 register Lisp_Object tail
;
1360 return Fmemq (elt
, list
);
1362 for (tail
= list
; CONSP (tail
); tail
= XCDR (tail
))
1364 register Lisp_Object tem
;
1365 CHECK_LIST_CONS (tail
, list
);
1367 if (FLOATP (tem
) && internal_equal (elt
, tem
, 0, 0))
1374 DEFUN ("assq", Fassq
, Sassq
, 2, 2, 0,
1375 doc
: /* Return non-nil if KEY is `eq' to the car of an element of LIST.
1376 The value is actually the first element of LIST whose car is KEY.
1377 Elements of LIST that are not conses are ignored. */)
1378 (Lisp_Object key
, Lisp_Object list
)
1383 || (CONSP (XCAR (list
))
1384 && EQ (XCAR (XCAR (list
)), key
)))
1389 || (CONSP (XCAR (list
))
1390 && EQ (XCAR (XCAR (list
)), key
)))
1395 || (CONSP (XCAR (list
))
1396 && EQ (XCAR (XCAR (list
)), key
)))
1406 /* Like Fassq but never report an error and do not allow quits.
1407 Use only on lists known never to be circular. */
1410 assq_no_quit (Lisp_Object key
, Lisp_Object list
)
1413 && (!CONSP (XCAR (list
))
1414 || !EQ (XCAR (XCAR (list
)), key
)))
1417 return CAR_SAFE (list
);
1420 DEFUN ("assoc", Fassoc
, Sassoc
, 2, 2, 0,
1421 doc
: /* Return non-nil if KEY is `equal' to the car of an element of LIST.
1422 The value is actually the first element of LIST whose car equals KEY. */)
1423 (Lisp_Object key
, Lisp_Object list
)
1430 || (CONSP (XCAR (list
))
1431 && (car
= XCAR (XCAR (list
)),
1432 EQ (car
, key
) || !NILP (Fequal (car
, key
)))))
1437 || (CONSP (XCAR (list
))
1438 && (car
= XCAR (XCAR (list
)),
1439 EQ (car
, key
) || !NILP (Fequal (car
, key
)))))
1444 || (CONSP (XCAR (list
))
1445 && (car
= XCAR (XCAR (list
)),
1446 EQ (car
, key
) || !NILP (Fequal (car
, key
)))))
1456 /* Like Fassoc but never report an error and do not allow quits.
1457 Use only on lists known never to be circular. */
1460 assoc_no_quit (Lisp_Object key
, Lisp_Object list
)
1463 && (!CONSP (XCAR (list
))
1464 || (!EQ (XCAR (XCAR (list
)), key
)
1465 && NILP (Fequal (XCAR (XCAR (list
)), key
)))))
1468 return CONSP (list
) ? XCAR (list
) : Qnil
;
1471 DEFUN ("rassq", Frassq
, Srassq
, 2, 2, 0,
1472 doc
: /* Return non-nil if KEY is `eq' to the cdr of an element of LIST.
1473 The value is actually the first element of LIST whose cdr is KEY. */)
1474 (register Lisp_Object key
, Lisp_Object list
)
1479 || (CONSP (XCAR (list
))
1480 && EQ (XCDR (XCAR (list
)), key
)))
1485 || (CONSP (XCAR (list
))
1486 && EQ (XCDR (XCAR (list
)), key
)))
1491 || (CONSP (XCAR (list
))
1492 && EQ (XCDR (XCAR (list
)), key
)))
1502 DEFUN ("rassoc", Frassoc
, Srassoc
, 2, 2, 0,
1503 doc
: /* Return non-nil if KEY is `equal' to the cdr of an element of LIST.
1504 The value is actually the first element of LIST whose cdr equals KEY. */)
1505 (Lisp_Object key
, Lisp_Object list
)
1512 || (CONSP (XCAR (list
))
1513 && (cdr
= XCDR (XCAR (list
)),
1514 EQ (cdr
, key
) || !NILP (Fequal (cdr
, key
)))))
1519 || (CONSP (XCAR (list
))
1520 && (cdr
= XCDR (XCAR (list
)),
1521 EQ (cdr
, key
) || !NILP (Fequal (cdr
, key
)))))
1526 || (CONSP (XCAR (list
))
1527 && (cdr
= XCDR (XCAR (list
)),
1528 EQ (cdr
, key
) || !NILP (Fequal (cdr
, key
)))))
1538 DEFUN ("delq", Fdelq
, Sdelq
, 2, 2, 0,
1539 doc
: /* Delete members of LIST which are `eq' to ELT, and return the result.
1540 More precisely, this function skips any members `eq' to ELT at the
1541 front of LIST, then removes members `eq' to ELT from the remaining
1542 sublist by modifying its list structure, then returns the resulting
1545 Write `(setq foo (delq element foo))' to be sure of correctly changing
1546 the value of a list `foo'. */)
1547 (register Lisp_Object elt
, Lisp_Object list
)
1549 register Lisp_Object tail
, prev
;
1550 register Lisp_Object tem
;
1554 while (!NILP (tail
))
1556 CHECK_LIST_CONS (tail
, list
);
1563 Fsetcdr (prev
, XCDR (tail
));
1573 DEFUN ("delete", Fdelete
, Sdelete
, 2, 2, 0,
1574 doc
: /* Delete members of SEQ which are `equal' to ELT, and return the result.
1575 SEQ must be a sequence (i.e. a list, a vector, or a string).
1576 The return value is a sequence of the same type.
1578 If SEQ is a list, this behaves like `delq', except that it compares
1579 with `equal' instead of `eq'. In particular, it may remove elements
1580 by altering the list structure.
1582 If SEQ is not a list, deletion is never performed destructively;
1583 instead this function creates and returns a new vector or string.
1585 Write `(setq foo (delete element foo))' to be sure of correctly
1586 changing the value of a sequence `foo'. */)
1587 (Lisp_Object elt
, Lisp_Object seq
)
1593 for (i
= n
= 0; i
< ASIZE (seq
); ++i
)
1594 if (NILP (Fequal (AREF (seq
, i
), elt
)))
1597 if (n
!= ASIZE (seq
))
1599 struct Lisp_Vector
*p
= allocate_vector (n
);
1601 for (i
= n
= 0; i
< ASIZE (seq
); ++i
)
1602 if (NILP (Fequal (AREF (seq
, i
), elt
)))
1603 p
->contents
[n
++] = AREF (seq
, i
);
1605 XSETVECTOR (seq
, p
);
1608 else if (STRINGP (seq
))
1610 ptrdiff_t i
, ibyte
, nchars
, nbytes
, cbytes
;
1613 for (i
= nchars
= nbytes
= ibyte
= 0;
1615 ++i
, ibyte
+= cbytes
)
1617 if (STRING_MULTIBYTE (seq
))
1619 c
= STRING_CHAR (SDATA (seq
) + ibyte
);
1620 cbytes
= CHAR_BYTES (c
);
1628 if (!INTEGERP (elt
) || c
!= XINT (elt
))
1635 if (nchars
!= SCHARS (seq
))
1639 tem
= make_uninit_multibyte_string (nchars
, nbytes
);
1640 if (!STRING_MULTIBYTE (seq
))
1641 STRING_SET_UNIBYTE (tem
);
1643 for (i
= nchars
= nbytes
= ibyte
= 0;
1645 ++i
, ibyte
+= cbytes
)
1647 if (STRING_MULTIBYTE (seq
))
1649 c
= STRING_CHAR (SDATA (seq
) + ibyte
);
1650 cbytes
= CHAR_BYTES (c
);
1658 if (!INTEGERP (elt
) || c
!= XINT (elt
))
1660 unsigned char *from
= SDATA (seq
) + ibyte
;
1661 unsigned char *to
= SDATA (tem
) + nbytes
;
1667 for (n
= cbytes
; n
--; )
1677 Lisp_Object tail
, prev
;
1679 for (tail
= seq
, prev
= Qnil
; CONSP (tail
); tail
= XCDR (tail
))
1681 CHECK_LIST_CONS (tail
, seq
);
1683 if (!NILP (Fequal (elt
, XCAR (tail
))))
1688 Fsetcdr (prev
, XCDR (tail
));
1699 DEFUN ("nreverse", Fnreverse
, Snreverse
, 1, 1, 0,
1700 doc
: /* Reverse LIST by modifying cdr pointers.
1701 Return the reversed list. Expects a properly nil-terminated list. */)
1704 register Lisp_Object prev
, tail
, next
;
1706 if (NILP (list
)) return list
;
1709 while (!NILP (tail
))
1712 CHECK_LIST_CONS (tail
, tail
);
1714 Fsetcdr (tail
, prev
);
1721 DEFUN ("reverse", Freverse
, Sreverse
, 1, 1, 0,
1722 doc
: /* Reverse LIST, copying. Return the reversed list.
1723 See also the function `nreverse', which is used more often. */)
1728 for (new = Qnil
; CONSP (list
); list
= XCDR (list
))
1731 new = Fcons (XCAR (list
), new);
1733 CHECK_LIST_END (list
, list
);
1737 Lisp_Object
merge (Lisp_Object org_l1
, Lisp_Object org_l2
, Lisp_Object pred
);
1739 DEFUN ("sort", Fsort
, Ssort
, 2, 2, 0,
1740 doc
: /* Sort LIST, stably, comparing elements using PREDICATE.
1741 Returns the sorted list. LIST is modified by side effects.
1742 PREDICATE is called with two elements of LIST, and should return non-nil
1743 if the first element should sort before the second. */)
1744 (Lisp_Object list
, Lisp_Object predicate
)
1746 Lisp_Object front
, back
;
1747 register Lisp_Object len
, tem
;
1748 struct gcpro gcpro1
, gcpro2
;
1752 len
= Flength (list
);
1753 length
= XINT (len
);
1757 XSETINT (len
, (length
/ 2) - 1);
1758 tem
= Fnthcdr (len
, list
);
1760 Fsetcdr (tem
, Qnil
);
1762 GCPRO2 (front
, back
);
1763 front
= Fsort (front
, predicate
);
1764 back
= Fsort (back
, predicate
);
1766 return merge (front
, back
, predicate
);
1770 merge (Lisp_Object org_l1
, Lisp_Object org_l2
, Lisp_Object pred
)
1773 register Lisp_Object tail
;
1775 register Lisp_Object l1
, l2
;
1776 struct gcpro gcpro1
, gcpro2
, gcpro3
, gcpro4
;
1783 /* It is sufficient to protect org_l1 and org_l2.
1784 When l1 and l2 are updated, we copy the new values
1785 back into the org_ vars. */
1786 GCPRO4 (org_l1
, org_l2
, pred
, value
);
1806 tem
= call2 (pred
, Fcar (l2
), Fcar (l1
));
1822 Fsetcdr (tail
, tem
);
1828 /* This does not check for quits. That is safe since it must terminate. */
1830 DEFUN ("plist-get", Fplist_get
, Splist_get
, 2, 2, 0,
1831 doc
: /* Extract a value from a property list.
1832 PLIST is a property list, which is a list of the form
1833 \(PROP1 VALUE1 PROP2 VALUE2...). This function returns the value
1834 corresponding to the given PROP, or nil if PROP is not one of the
1835 properties on the list. This function never signals an error. */)
1836 (Lisp_Object plist
, Lisp_Object prop
)
1838 Lisp_Object tail
, halftail
;
1840 /* halftail is used to detect circular lists. */
1841 tail
= halftail
= plist
;
1842 while (CONSP (tail
) && CONSP (XCDR (tail
)))
1844 if (EQ (prop
, XCAR (tail
)))
1845 return XCAR (XCDR (tail
));
1847 tail
= XCDR (XCDR (tail
));
1848 halftail
= XCDR (halftail
);
1849 if (EQ (tail
, halftail
))
1856 DEFUN ("get", Fget
, Sget
, 2, 2, 0,
1857 doc
: /* Return the value of SYMBOL's PROPNAME property.
1858 This is the last value stored with `(put SYMBOL PROPNAME VALUE)'. */)
1859 (Lisp_Object symbol
, Lisp_Object propname
)
1861 CHECK_SYMBOL (symbol
);
1862 return Fplist_get (XSYMBOL (symbol
)->plist
, propname
);
1865 DEFUN ("plist-put", Fplist_put
, Splist_put
, 3, 3, 0,
1866 doc
: /* Change value in PLIST of PROP to VAL.
1867 PLIST is a property list, which is a list of the form
1868 \(PROP1 VALUE1 PROP2 VALUE2 ...). PROP is a symbol and VAL is any object.
1869 If PROP is already a property on the list, its value is set to VAL,
1870 otherwise the new PROP VAL pair is added. The new plist is returned;
1871 use `(setq x (plist-put x prop val))' to be sure to use the new value.
1872 The PLIST is modified by side effects. */)
1873 (Lisp_Object plist
, register Lisp_Object prop
, Lisp_Object val
)
1875 register Lisp_Object tail
, prev
;
1876 Lisp_Object newcell
;
1878 for (tail
= plist
; CONSP (tail
) && CONSP (XCDR (tail
));
1879 tail
= XCDR (XCDR (tail
)))
1881 if (EQ (prop
, XCAR (tail
)))
1883 Fsetcar (XCDR (tail
), val
);
1890 newcell
= Fcons (prop
, Fcons (val
, NILP (prev
) ? plist
: XCDR (XCDR (prev
))));
1894 Fsetcdr (XCDR (prev
), newcell
);
1898 DEFUN ("put", Fput
, Sput
, 3, 3, 0,
1899 doc
: /* Store SYMBOL's PROPNAME property with value VALUE.
1900 It can be retrieved with `(get SYMBOL PROPNAME)'. */)
1901 (Lisp_Object symbol
, Lisp_Object propname
, Lisp_Object value
)
1903 CHECK_SYMBOL (symbol
);
1905 (symbol
, Fplist_put (XSYMBOL (symbol
)->plist
, propname
, value
));
1909 DEFUN ("lax-plist-get", Flax_plist_get
, Slax_plist_get
, 2, 2, 0,
1910 doc
: /* Extract a value from a property list, comparing with `equal'.
1911 PLIST is a property list, which is a list of the form
1912 \(PROP1 VALUE1 PROP2 VALUE2...). This function returns the value
1913 corresponding to the given PROP, or nil if PROP is not
1914 one of the properties on the list. */)
1915 (Lisp_Object plist
, Lisp_Object prop
)
1920 CONSP (tail
) && CONSP (XCDR (tail
));
1921 tail
= XCDR (XCDR (tail
)))
1923 if (! NILP (Fequal (prop
, XCAR (tail
))))
1924 return XCAR (XCDR (tail
));
1929 CHECK_LIST_END (tail
, prop
);
1934 DEFUN ("lax-plist-put", Flax_plist_put
, Slax_plist_put
, 3, 3, 0,
1935 doc
: /* Change value in PLIST of PROP to VAL, comparing with `equal'.
1936 PLIST is a property list, which is a list of the form
1937 \(PROP1 VALUE1 PROP2 VALUE2 ...). PROP and VAL are any objects.
1938 If PROP is already a property on the list, its value is set to VAL,
1939 otherwise the new PROP VAL pair is added. The new plist is returned;
1940 use `(setq x (lax-plist-put x prop val))' to be sure to use the new value.
1941 The PLIST is modified by side effects. */)
1942 (Lisp_Object plist
, register Lisp_Object prop
, Lisp_Object val
)
1944 register Lisp_Object tail
, prev
;
1945 Lisp_Object newcell
;
1947 for (tail
= plist
; CONSP (tail
) && CONSP (XCDR (tail
));
1948 tail
= XCDR (XCDR (tail
)))
1950 if (! NILP (Fequal (prop
, XCAR (tail
))))
1952 Fsetcar (XCDR (tail
), val
);
1959 newcell
= Fcons (prop
, Fcons (val
, Qnil
));
1963 Fsetcdr (XCDR (prev
), newcell
);
1967 DEFUN ("eql", Feql
, Seql
, 2, 2, 0,
1968 doc
: /* Return t if the two args are the same Lisp object.
1969 Floating-point numbers of equal value are `eql', but they may not be `eq'. */)
1970 (Lisp_Object obj1
, Lisp_Object obj2
)
1973 return internal_equal (obj1
, obj2
, 0, 0) ? Qt
: Qnil
;
1975 return EQ (obj1
, obj2
) ? Qt
: Qnil
;
1978 DEFUN ("equal", Fequal
, Sequal
, 2, 2, 0,
1979 doc
: /* Return t if two Lisp objects have similar structure and contents.
1980 They must have the same data type.
1981 Conses are compared by comparing the cars and the cdrs.
1982 Vectors and strings are compared element by element.
1983 Numbers are compared by value, but integers cannot equal floats.
1984 (Use `=' if you want integers and floats to be able to be equal.)
1985 Symbols must match exactly. */)
1986 (register Lisp_Object o1
, Lisp_Object o2
)
1988 return internal_equal (o1
, o2
, 0, 0) ? Qt
: Qnil
;
1991 DEFUN ("equal-including-properties", Fequal_including_properties
, Sequal_including_properties
, 2, 2, 0,
1992 doc
: /* Return t if two Lisp objects have similar structure and contents.
1993 This is like `equal' except that it compares the text properties
1994 of strings. (`equal' ignores text properties.) */)
1995 (register Lisp_Object o1
, Lisp_Object o2
)
1997 return internal_equal (o1
, o2
, 0, 1) ? Qt
: Qnil
;
2000 /* DEPTH is current depth of recursion. Signal an error if it
2002 PROPS means compare string text properties too. */
2005 internal_equal (Lisp_Object o1
, Lisp_Object o2
, int depth
, bool props
)
2008 error ("Stack overflow in equal");
2014 if (XTYPE (o1
) != XTYPE (o2
))
2023 d1
= extract_float (o1
);
2024 d2
= extract_float (o2
);
2025 /* If d is a NaN, then d != d. Two NaNs should be `equal' even
2026 though they are not =. */
2027 return d1
== d2
|| (d1
!= d1
&& d2
!= d2
);
2031 if (!internal_equal (XCAR (o1
), XCAR (o2
), depth
+ 1, props
))
2038 if (XMISCTYPE (o1
) != XMISCTYPE (o2
))
2042 if (!internal_equal (OVERLAY_START (o1
), OVERLAY_START (o2
),
2044 || !internal_equal (OVERLAY_END (o1
), OVERLAY_END (o2
),
2047 o1
= XOVERLAY (o1
)->plist
;
2048 o2
= XOVERLAY (o2
)->plist
;
2053 return (XMARKER (o1
)->buffer
== XMARKER (o2
)->buffer
2054 && (XMARKER (o1
)->buffer
== 0
2055 || XMARKER (o1
)->bytepos
== XMARKER (o2
)->bytepos
));
2059 case Lisp_Vectorlike
:
2062 ptrdiff_t size
= ASIZE (o1
);
2063 /* Pseudovectors have the type encoded in the size field, so this test
2064 actually checks that the objects have the same type as well as the
2066 if (ASIZE (o2
) != size
)
2068 /* Boolvectors are compared much like strings. */
2069 if (BOOL_VECTOR_P (o1
))
2071 if (XBOOL_VECTOR (o1
)->size
!= XBOOL_VECTOR (o2
)->size
)
2073 if (memcmp (XBOOL_VECTOR (o1
)->data
, XBOOL_VECTOR (o2
)->data
,
2074 ((XBOOL_VECTOR (o1
)->size
2075 + BOOL_VECTOR_BITS_PER_CHAR
- 1)
2076 / BOOL_VECTOR_BITS_PER_CHAR
)))
2080 if (WINDOW_CONFIGURATIONP (o1
))
2081 return compare_window_configurations (o1
, o2
, 0);
2083 /* Aside from them, only true vectors, char-tables, compiled
2084 functions, and fonts (font-spec, font-entity, font-object)
2085 are sensible to compare, so eliminate the others now. */
2086 if (size
& PSEUDOVECTOR_FLAG
)
2088 if (((size
& PVEC_TYPE_MASK
) >> PSEUDOVECTOR_AREA_BITS
)
2091 size
&= PSEUDOVECTOR_SIZE_MASK
;
2093 for (i
= 0; i
< size
; i
++)
2098 if (!internal_equal (v1
, v2
, depth
+ 1, props
))
2106 if (SCHARS (o1
) != SCHARS (o2
))
2108 if (SBYTES (o1
) != SBYTES (o2
))
2110 if (memcmp (SDATA (o1
), SDATA (o2
), SBYTES (o1
)))
2112 if (props
&& !compare_string_intervals (o1
, o2
))
2124 DEFUN ("fillarray", Ffillarray
, Sfillarray
, 2, 2, 0,
2125 doc
: /* Store each element of ARRAY with ITEM.
2126 ARRAY is a vector, string, char-table, or bool-vector. */)
2127 (Lisp_Object array
, Lisp_Object item
)
2129 register ptrdiff_t size
, idx
;
2131 if (VECTORP (array
))
2132 for (idx
= 0, size
= ASIZE (array
); idx
< size
; idx
++)
2133 ASET (array
, idx
, item
);
2134 else if (CHAR_TABLE_P (array
))
2138 for (i
= 0; i
< (1 << CHARTAB_SIZE_BITS_0
); i
++)
2139 set_char_table_contents (array
, i
, item
);
2140 set_char_table_defalt (array
, item
);
2142 else if (STRINGP (array
))
2144 register unsigned char *p
= SDATA (array
);
2146 CHECK_CHARACTER (item
);
2147 charval
= XFASTINT (item
);
2148 size
= SCHARS (array
);
2149 if (STRING_MULTIBYTE (array
))
2151 unsigned char str
[MAX_MULTIBYTE_LENGTH
];
2152 int len
= CHAR_STRING (charval
, str
);
2153 ptrdiff_t size_byte
= SBYTES (array
);
2155 if (INT_MULTIPLY_OVERFLOW (SCHARS (array
), len
)
2156 || SCHARS (array
) * len
!= size_byte
)
2157 error ("Attempt to change byte length of a string");
2158 for (idx
= 0; idx
< size_byte
; idx
++)
2159 *p
++ = str
[idx
% len
];
2162 for (idx
= 0; idx
< size
; idx
++)
2165 else if (BOOL_VECTOR_P (array
))
2167 register unsigned char *p
= XBOOL_VECTOR (array
)->data
;
2169 ((XBOOL_VECTOR (array
)->size
+ BOOL_VECTOR_BITS_PER_CHAR
- 1)
2170 / BOOL_VECTOR_BITS_PER_CHAR
);
2174 memset (p
, ! NILP (item
) ? -1 : 0, size
);
2176 /* Clear any extraneous bits in the last byte. */
2177 p
[size
- 1] &= (1 << (size
% BOOL_VECTOR_BITS_PER_CHAR
)) - 1;
2181 wrong_type_argument (Qarrayp
, array
);
2185 DEFUN ("clear-string", Fclear_string
, Sclear_string
,
2187 doc
: /* Clear the contents of STRING.
2188 This makes STRING unibyte and may change its length. */)
2189 (Lisp_Object string
)
2192 CHECK_STRING (string
);
2193 len
= SBYTES (string
);
2194 memset (SDATA (string
), 0, len
);
2195 STRING_SET_CHARS (string
, len
);
2196 STRING_SET_UNIBYTE (string
);
2202 nconc2 (Lisp_Object s1
, Lisp_Object s2
)
2204 Lisp_Object args
[2];
2207 return Fnconc (2, args
);
2210 DEFUN ("nconc", Fnconc
, Snconc
, 0, MANY
, 0,
2211 doc
: /* Concatenate any number of lists by altering them.
2212 Only the last argument is not altered, and need not be a list.
2213 usage: (nconc &rest LISTS) */)
2214 (ptrdiff_t nargs
, Lisp_Object
*args
)
2217 register Lisp_Object tail
, tem
, val
;
2221 for (argnum
= 0; argnum
< nargs
; argnum
++)
2224 if (NILP (tem
)) continue;
2229 if (argnum
+ 1 == nargs
) break;
2231 CHECK_LIST_CONS (tem
, tem
);
2240 tem
= args
[argnum
+ 1];
2241 Fsetcdr (tail
, tem
);
2243 args
[argnum
+ 1] = tail
;
2249 /* This is the guts of all mapping functions.
2250 Apply FN to each element of SEQ, one by one,
2251 storing the results into elements of VALS, a C vector of Lisp_Objects.
2252 LENI is the length of VALS, which should also be the length of SEQ. */
2255 mapcar1 (EMACS_INT leni
, Lisp_Object
*vals
, Lisp_Object fn
, Lisp_Object seq
)
2257 register Lisp_Object tail
;
2259 register EMACS_INT i
;
2260 struct gcpro gcpro1
, gcpro2
, gcpro3
;
2264 /* Don't let vals contain any garbage when GC happens. */
2265 for (i
= 0; i
< leni
; i
++)
2268 GCPRO3 (dummy
, fn
, seq
);
2270 gcpro1
.nvars
= leni
;
2274 /* We need not explicitly protect `tail' because it is used only on lists, and
2275 1) lists are not relocated and 2) the list is marked via `seq' so will not
2278 if (VECTORP (seq
) || COMPILEDP (seq
))
2280 for (i
= 0; i
< leni
; i
++)
2282 dummy
= call1 (fn
, AREF (seq
, i
));
2287 else if (BOOL_VECTOR_P (seq
))
2289 for (i
= 0; i
< leni
; i
++)
2292 byte
= XBOOL_VECTOR (seq
)->data
[i
/ BOOL_VECTOR_BITS_PER_CHAR
];
2293 dummy
= (byte
& (1 << (i
% BOOL_VECTOR_BITS_PER_CHAR
))) ? Qt
: Qnil
;
2294 dummy
= call1 (fn
, dummy
);
2299 else if (STRINGP (seq
))
2303 for (i
= 0, i_byte
= 0; i
< leni
;)
2306 ptrdiff_t i_before
= i
;
2308 FETCH_STRING_CHAR_ADVANCE (c
, seq
, i
, i_byte
);
2309 XSETFASTINT (dummy
, c
);
2310 dummy
= call1 (fn
, dummy
);
2312 vals
[i_before
] = dummy
;
2315 else /* Must be a list, since Flength did not get an error */
2318 for (i
= 0; i
< leni
&& CONSP (tail
); i
++)
2320 dummy
= call1 (fn
, XCAR (tail
));
2330 DEFUN ("mapconcat", Fmapconcat
, Smapconcat
, 3, 3, 0,
2331 doc
: /* Apply FUNCTION to each element of SEQUENCE, and concat the results as strings.
2332 In between each pair of results, stick in SEPARATOR. Thus, " " as
2333 SEPARATOR results in spaces between the values returned by FUNCTION.
2334 SEQUENCE may be a list, a vector, a bool-vector, or a string. */)
2335 (Lisp_Object function
, Lisp_Object sequence
, Lisp_Object separator
)
2338 register EMACS_INT leni
;
2341 register Lisp_Object
*args
;
2342 struct gcpro gcpro1
;
2346 len
= Flength (sequence
);
2347 if (CHAR_TABLE_P (sequence
))
2348 wrong_type_argument (Qlistp
, sequence
);
2350 nargs
= leni
+ leni
- 1;
2351 if (nargs
< 0) return empty_unibyte_string
;
2353 SAFE_ALLOCA_LISP (args
, nargs
);
2356 mapcar1 (leni
, args
, function
, sequence
);
2359 for (i
= leni
- 1; i
> 0; i
--)
2360 args
[i
+ i
] = args
[i
];
2362 for (i
= 1; i
< nargs
; i
+= 2)
2363 args
[i
] = separator
;
2365 ret
= Fconcat (nargs
, args
);
2371 DEFUN ("mapcar", Fmapcar
, Smapcar
, 2, 2, 0,
2372 doc
: /* Apply FUNCTION to each element of SEQUENCE, and make a list of the results.
2373 The result is a list just as long as SEQUENCE.
2374 SEQUENCE may be a list, a vector, a bool-vector, or a string. */)
2375 (Lisp_Object function
, Lisp_Object sequence
)
2377 register Lisp_Object len
;
2378 register EMACS_INT leni
;
2379 register Lisp_Object
*args
;
2383 len
= Flength (sequence
);
2384 if (CHAR_TABLE_P (sequence
))
2385 wrong_type_argument (Qlistp
, sequence
);
2386 leni
= XFASTINT (len
);
2388 SAFE_ALLOCA_LISP (args
, leni
);
2390 mapcar1 (leni
, args
, function
, sequence
);
2392 ret
= Flist (leni
, args
);
2398 DEFUN ("mapc", Fmapc
, Smapc
, 2, 2, 0,
2399 doc
: /* Apply FUNCTION to each element of SEQUENCE for side effects only.
2400 Unlike `mapcar', don't accumulate the results. Return SEQUENCE.
2401 SEQUENCE may be a list, a vector, a bool-vector, or a string. */)
2402 (Lisp_Object function
, Lisp_Object sequence
)
2404 register EMACS_INT leni
;
2406 leni
= XFASTINT (Flength (sequence
));
2407 if (CHAR_TABLE_P (sequence
))
2408 wrong_type_argument (Qlistp
, sequence
);
2409 mapcar1 (leni
, 0, function
, sequence
);
2414 /* This is how C code calls `yes-or-no-p' and allows the user
2417 Anything that calls this function must protect from GC! */
2420 do_yes_or_no_p (Lisp_Object prompt
)
2422 return call1 (intern ("yes-or-no-p"), prompt
);
2425 /* Anything that calls this function must protect from GC! */
2427 DEFUN ("yes-or-no-p", Fyes_or_no_p
, Syes_or_no_p
, 1, 1, 0,
2428 doc
: /* Ask user a yes-or-no question. Return t if answer is yes.
2429 PROMPT is the string to display to ask the question. It should end in
2430 a space; `yes-or-no-p' adds \"(yes or no) \" to it.
2432 The user must confirm the answer with RET, and can edit it until it
2435 Under a windowing system a dialog box will be used if `last-nonmenu-event'
2436 is nil, and `use-dialog-box' is non-nil. */)
2437 (Lisp_Object prompt
)
2439 register Lisp_Object ans
;
2440 Lisp_Object args
[2];
2441 struct gcpro gcpro1
;
2443 CHECK_STRING (prompt
);
2446 if (FRAME_WINDOW_P (SELECTED_FRAME ())
2447 && (NILP (last_nonmenu_event
) || CONSP (last_nonmenu_event
))
2451 Lisp_Object pane
, menu
, obj
;
2452 redisplay_preserve_echo_area (4);
2453 pane
= Fcons (Fcons (build_string ("Yes"), Qt
),
2454 Fcons (Fcons (build_string ("No"), Qnil
),
2457 menu
= Fcons (prompt
, pane
);
2458 obj
= Fx_popup_dialog (Qt
, menu
, Qnil
);
2462 #endif /* HAVE_MENUS */
2465 args
[1] = build_string ("(yes or no) ");
2466 prompt
= Fconcat (2, args
);
2472 ans
= Fdowncase (Fread_from_minibuffer (prompt
, Qnil
, Qnil
, Qnil
,
2473 Qyes_or_no_p_history
, Qnil
,
2475 if (SCHARS (ans
) == 3 && !strcmp (SSDATA (ans
), "yes"))
2480 if (SCHARS (ans
) == 2 && !strcmp (SSDATA (ans
), "no"))
2488 message1 ("Please answer yes or no.");
2489 Fsleep_for (make_number (2), Qnil
);
2493 DEFUN ("load-average", Fload_average
, Sload_average
, 0, 1, 0,
2494 doc
: /* Return list of 1 minute, 5 minute and 15 minute load averages.
2496 Each of the three load averages is multiplied by 100, then converted
2499 When USE-FLOATS is non-nil, floats will be used instead of integers.
2500 These floats are not multiplied by 100.
2502 If the 5-minute or 15-minute load averages are not available, return a
2503 shortened list, containing only those averages which are available.
2505 An error is thrown if the load average can't be obtained. In some
2506 cases making it work would require Emacs being installed setuid or
2507 setgid so that it can read kernel information, and that usually isn't
2509 (Lisp_Object use_floats
)
2512 int loads
= getloadavg (load_ave
, 3);
2513 Lisp_Object ret
= Qnil
;
2516 error ("load-average not implemented for this operating system");
2520 Lisp_Object load
= (NILP (use_floats
)
2521 ? make_number (100.0 * load_ave
[loads
])
2522 : make_float (load_ave
[loads
]));
2523 ret
= Fcons (load
, ret
);
2529 static Lisp_Object Qsubfeatures
;
2531 DEFUN ("featurep", Ffeaturep
, Sfeaturep
, 1, 2, 0,
2532 doc
: /* Return t if FEATURE is present in this Emacs.
2534 Use this to conditionalize execution of lisp code based on the
2535 presence or absence of Emacs or environment extensions.
2536 Use `provide' to declare that a feature is available. This function
2537 looks at the value of the variable `features'. The optional argument
2538 SUBFEATURE can be used to check a specific subfeature of FEATURE. */)
2539 (Lisp_Object feature
, Lisp_Object subfeature
)
2541 register Lisp_Object tem
;
2542 CHECK_SYMBOL (feature
);
2543 tem
= Fmemq (feature
, Vfeatures
);
2544 if (!NILP (tem
) && !NILP (subfeature
))
2545 tem
= Fmember (subfeature
, Fget (feature
, Qsubfeatures
));
2546 return (NILP (tem
)) ? Qnil
: Qt
;
2549 DEFUN ("provide", Fprovide
, Sprovide
, 1, 2, 0,
2550 doc
: /* Announce that FEATURE is a feature of the current Emacs.
2551 The optional argument SUBFEATURES should be a list of symbols listing
2552 particular subfeatures supported in this version of FEATURE. */)
2553 (Lisp_Object feature
, Lisp_Object subfeatures
)
2555 register Lisp_Object tem
;
2556 CHECK_SYMBOL (feature
);
2557 CHECK_LIST (subfeatures
);
2558 if (!NILP (Vautoload_queue
))
2559 Vautoload_queue
= Fcons (Fcons (make_number (0), Vfeatures
),
2561 tem
= Fmemq (feature
, Vfeatures
);
2563 Vfeatures
= Fcons (feature
, Vfeatures
);
2564 if (!NILP (subfeatures
))
2565 Fput (feature
, Qsubfeatures
, subfeatures
);
2566 LOADHIST_ATTACH (Fcons (Qprovide
, feature
));
2568 /* Run any load-hooks for this file. */
2569 tem
= Fassq (feature
, Vafter_load_alist
);
2571 Fprogn (XCDR (tem
));
2576 /* `require' and its subroutines. */
2578 /* List of features currently being require'd, innermost first. */
2580 static Lisp_Object require_nesting_list
;
2583 require_unwind (Lisp_Object old_value
)
2585 return require_nesting_list
= old_value
;
2588 DEFUN ("require", Frequire
, Srequire
, 1, 3, 0,
2589 doc
: /* If feature FEATURE is not loaded, load it from FILENAME.
2590 If FEATURE is not a member of the list `features', then the feature
2591 is not loaded; so load the file FILENAME.
2592 If FILENAME is omitted, the printname of FEATURE is used as the file name,
2593 and `load' will try to load this name appended with the suffix `.elc' or
2594 `.el', in that order. The name without appended suffix will not be used.
2595 See `get-load-suffixes' for the complete list of suffixes.
2596 If the optional third argument NOERROR is non-nil,
2597 then return nil if the file is not found instead of signaling an error.
2598 Normally the return value is FEATURE.
2599 The normal messages at start and end of loading FILENAME are suppressed. */)
2600 (Lisp_Object feature
, Lisp_Object filename
, Lisp_Object noerror
)
2603 struct gcpro gcpro1
, gcpro2
;
2604 bool from_file
= load_in_progress
;
2606 CHECK_SYMBOL (feature
);
2608 /* Record the presence of `require' in this file
2609 even if the feature specified is already loaded.
2610 But not more than once in any file,
2611 and not when we aren't loading or reading from a file. */
2613 for (tem
= Vcurrent_load_list
; CONSP (tem
); tem
= XCDR (tem
))
2614 if (NILP (XCDR (tem
)) && STRINGP (XCAR (tem
)))
2619 tem
= Fcons (Qrequire
, feature
);
2620 if (NILP (Fmember (tem
, Vcurrent_load_list
)))
2621 LOADHIST_ATTACH (tem
);
2623 tem
= Fmemq (feature
, Vfeatures
);
2627 ptrdiff_t count
= SPECPDL_INDEX ();
2630 /* This is to make sure that loadup.el gives a clear picture
2631 of what files are preloaded and when. */
2632 if (! NILP (Vpurify_flag
))
2633 error ("(require %s) while preparing to dump",
2634 SDATA (SYMBOL_NAME (feature
)));
2636 /* A certain amount of recursive `require' is legitimate,
2637 but if we require the same feature recursively 3 times,
2639 tem
= require_nesting_list
;
2640 while (! NILP (tem
))
2642 if (! NILP (Fequal (feature
, XCAR (tem
))))
2647 error ("Recursive `require' for feature `%s'",
2648 SDATA (SYMBOL_NAME (feature
)));
2650 /* Update the list for any nested `require's that occur. */
2651 record_unwind_protect (require_unwind
, require_nesting_list
);
2652 require_nesting_list
= Fcons (feature
, require_nesting_list
);
2654 /* Value saved here is to be restored into Vautoload_queue */
2655 record_unwind_protect (un_autoload
, Vautoload_queue
);
2656 Vautoload_queue
= Qt
;
2658 /* Load the file. */
2659 GCPRO2 (feature
, filename
);
2660 tem
= Fload (NILP (filename
) ? Fsymbol_name (feature
) : filename
,
2661 noerror
, Qt
, Qnil
, (NILP (filename
) ? Qt
: Qnil
));
2664 /* If load failed entirely, return nil. */
2666 return unbind_to (count
, Qnil
);
2668 tem
= Fmemq (feature
, Vfeatures
);
2670 error ("Required feature `%s' was not provided",
2671 SDATA (SYMBOL_NAME (feature
)));
2673 /* Once loading finishes, don't undo it. */
2674 Vautoload_queue
= Qt
;
2675 feature
= unbind_to (count
, feature
);
2681 /* Primitives for work of the "widget" library.
2682 In an ideal world, this section would not have been necessary.
2683 However, lisp function calls being as slow as they are, it turns
2684 out that some functions in the widget library (wid-edit.el) are the
2685 bottleneck of Widget operation. Here is their translation to C,
2686 for the sole reason of efficiency. */
2688 DEFUN ("plist-member", Fplist_member
, Splist_member
, 2, 2, 0,
2689 doc
: /* Return non-nil if PLIST has the property PROP.
2690 PLIST is a property list, which is a list of the form
2691 \(PROP1 VALUE1 PROP2 VALUE2 ...\). PROP is a symbol.
2692 Unlike `plist-get', this allows you to distinguish between a missing
2693 property and a property with the value nil.
2694 The value is actually the tail of PLIST whose car is PROP. */)
2695 (Lisp_Object plist
, Lisp_Object prop
)
2697 while (CONSP (plist
) && !EQ (XCAR (plist
), prop
))
2700 plist
= XCDR (plist
);
2701 plist
= CDR (plist
);
2706 DEFUN ("widget-put", Fwidget_put
, Swidget_put
, 3, 3, 0,
2707 doc
: /* In WIDGET, set PROPERTY to VALUE.
2708 The value can later be retrieved with `widget-get'. */)
2709 (Lisp_Object widget
, Lisp_Object property
, Lisp_Object value
)
2711 CHECK_CONS (widget
);
2712 XSETCDR (widget
, Fplist_put (XCDR (widget
), property
, value
));
2716 DEFUN ("widget-get", Fwidget_get
, Swidget_get
, 2, 2, 0,
2717 doc
: /* In WIDGET, get the value of PROPERTY.
2718 The value could either be specified when the widget was created, or
2719 later with `widget-put'. */)
2720 (Lisp_Object widget
, Lisp_Object property
)
2728 CHECK_CONS (widget
);
2729 tmp
= Fplist_member (XCDR (widget
), property
);
2735 tmp
= XCAR (widget
);
2738 widget
= Fget (tmp
, Qwidget_type
);
2742 DEFUN ("widget-apply", Fwidget_apply
, Swidget_apply
, 2, MANY
, 0,
2743 doc
: /* Apply the value of WIDGET's PROPERTY to the widget itself.
2744 ARGS are passed as extra arguments to the function.
2745 usage: (widget-apply WIDGET PROPERTY &rest ARGS) */)
2746 (ptrdiff_t nargs
, Lisp_Object
*args
)
2748 /* This function can GC. */
2749 Lisp_Object newargs
[3];
2750 struct gcpro gcpro1
, gcpro2
;
2753 newargs
[0] = Fwidget_get (args
[0], args
[1]);
2754 newargs
[1] = args
[0];
2755 newargs
[2] = Flist (nargs
- 2, args
+ 2);
2756 GCPRO2 (newargs
[0], newargs
[2]);
2757 result
= Fapply (3, newargs
);
2762 #ifdef HAVE_LANGINFO_CODESET
2763 #include <langinfo.h>
2766 DEFUN ("locale-info", Flocale_info
, Slocale_info
, 1, 1, 0,
2767 doc
: /* Access locale data ITEM for the current C locale, if available.
2768 ITEM should be one of the following:
2770 `codeset', returning the character set as a string (locale item CODESET);
2772 `days', returning a 7-element vector of day names (locale items DAY_n);
2774 `months', returning a 12-element vector of month names (locale items MON_n);
2776 `paper', returning a list (WIDTH HEIGHT) for the default paper size,
2777 both measured in millimeters (locale items PAPER_WIDTH, PAPER_HEIGHT).
2779 If the system can't provide such information through a call to
2780 `nl_langinfo', or if ITEM isn't from the list above, return nil.
2782 See also Info node `(libc)Locales'.
2784 The data read from the system are decoded using `locale-coding-system'. */)
2788 #ifdef HAVE_LANGINFO_CODESET
2790 if (EQ (item
, Qcodeset
))
2792 str
= nl_langinfo (CODESET
);
2793 return build_string (str
);
2796 else if (EQ (item
, Qdays
)) /* e.g. for calendar-day-name-array */
2798 Lisp_Object v
= Fmake_vector (make_number (7), Qnil
);
2799 const int days
[7] = {DAY_1
, DAY_2
, DAY_3
, DAY_4
, DAY_5
, DAY_6
, DAY_7
};
2801 struct gcpro gcpro1
;
2803 synchronize_system_time_locale ();
2804 for (i
= 0; i
< 7; i
++)
2806 str
= nl_langinfo (days
[i
]);
2807 val
= build_unibyte_string (str
);
2808 /* Fixme: Is this coding system necessarily right, even if
2809 it is consistent with CODESET? If not, what to do? */
2810 ASET (v
, i
, code_convert_string_norecord (val
, Vlocale_coding_system
,
2818 else if (EQ (item
, Qmonths
)) /* e.g. for calendar-month-name-array */
2820 Lisp_Object v
= Fmake_vector (make_number (12), Qnil
);
2821 const int months
[12] = {MON_1
, MON_2
, MON_3
, MON_4
, MON_5
, MON_6
, MON_7
,
2822 MON_8
, MON_9
, MON_10
, MON_11
, MON_12
};
2824 struct gcpro gcpro1
;
2826 synchronize_system_time_locale ();
2827 for (i
= 0; i
< 12; i
++)
2829 str
= nl_langinfo (months
[i
]);
2830 val
= build_unibyte_string (str
);
2831 ASET (v
, i
, code_convert_string_norecord (val
, Vlocale_coding_system
,
2838 /* LC_PAPER stuff isn't defined as accessible in glibc as of 2.3.1,
2839 but is in the locale files. This could be used by ps-print. */
2841 else if (EQ (item
, Qpaper
))
2843 return list2 (make_number (nl_langinfo (PAPER_WIDTH
)),
2844 make_number (nl_langinfo (PAPER_HEIGHT
)));
2846 #endif /* PAPER_WIDTH */
2847 #endif /* HAVE_LANGINFO_CODESET*/
2851 /* base64 encode/decode functions (RFC 2045).
2852 Based on code from GNU recode. */
2854 #define MIME_LINE_LENGTH 76
2856 #define IS_ASCII(Character) \
2858 #define IS_BASE64(Character) \
2859 (IS_ASCII (Character) && base64_char_to_value[Character] >= 0)
2860 #define IS_BASE64_IGNORABLE(Character) \
2861 ((Character) == ' ' || (Character) == '\t' || (Character) == '\n' \
2862 || (Character) == '\f' || (Character) == '\r')
2864 /* Used by base64_decode_1 to retrieve a non-base64-ignorable
2865 character or return retval if there are no characters left to
2867 #define READ_QUADRUPLET_BYTE(retval) \
2872 if (nchars_return) \
2873 *nchars_return = nchars; \
2878 while (IS_BASE64_IGNORABLE (c))
2880 /* Table of characters coding the 64 values. */
2881 static const char base64_value_to_char
[64] =
2883 'A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I', 'J', /* 0- 9 */
2884 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', /* 10-19 */
2885 'U', 'V', 'W', 'X', 'Y', 'Z', 'a', 'b', 'c', 'd', /* 20-29 */
2886 'e', 'f', 'g', 'h', 'i', 'j', 'k', 'l', 'm', 'n', /* 30-39 */
2887 'o', 'p', 'q', 'r', 's', 't', 'u', 'v', 'w', 'x', /* 40-49 */
2888 'y', 'z', '0', '1', '2', '3', '4', '5', '6', '7', /* 50-59 */
2889 '8', '9', '+', '/' /* 60-63 */
2892 /* Table of base64 values for first 128 characters. */
2893 static const short base64_char_to_value
[128] =
2895 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0- 9 */
2896 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 10- 19 */
2897 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 20- 29 */
2898 -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 30- 39 */
2899 -1, -1, -1, 62, -1, -1, -1, 63, 52, 53, /* 40- 49 */
2900 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, /* 50- 59 */
2901 -1, -1, -1, -1, -1, 0, 1, 2, 3, 4, /* 60- 69 */
2902 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, /* 70- 79 */
2903 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, /* 80- 89 */
2904 25, -1, -1, -1, -1, -1, -1, 26, 27, 28, /* 90- 99 */
2905 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, /* 100-109 */
2906 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, /* 110-119 */
2907 49, 50, 51, -1, -1, -1, -1, -1 /* 120-127 */
2910 /* The following diagram shows the logical steps by which three octets
2911 get transformed into four base64 characters.
2913 .--------. .--------. .--------.
2914 |aaaaaabb| |bbbbcccc| |ccdddddd|
2915 `--------' `--------' `--------'
2917 .--------+--------+--------+--------.
2918 |00aaaaaa|00bbbbbb|00cccccc|00dddddd|
2919 `--------+--------+--------+--------'
2921 .--------+--------+--------+--------.
2922 |AAAAAAAA|BBBBBBBB|CCCCCCCC|DDDDDDDD|
2923 `--------+--------+--------+--------'
2925 The octets are divided into 6 bit chunks, which are then encoded into
2926 base64 characters. */
2929 static ptrdiff_t base64_encode_1 (const char *, char *, ptrdiff_t, bool, bool);
2930 static ptrdiff_t base64_decode_1 (const char *, char *, ptrdiff_t, bool,
2933 DEFUN ("base64-encode-region", Fbase64_encode_region
, Sbase64_encode_region
,
2935 doc
: /* Base64-encode the region between BEG and END.
2936 Return the length of the encoded text.
2937 Optional third argument NO-LINE-BREAK means do not break long lines
2938 into shorter lines. */)
2939 (Lisp_Object beg
, Lisp_Object end
, Lisp_Object no_line_break
)
2942 ptrdiff_t allength
, length
;
2943 ptrdiff_t ibeg
, iend
, encoded_length
;
2944 ptrdiff_t old_pos
= PT
;
2947 validate_region (&beg
, &end
);
2949 ibeg
= CHAR_TO_BYTE (XFASTINT (beg
));
2950 iend
= CHAR_TO_BYTE (XFASTINT (end
));
2951 move_gap_both (XFASTINT (beg
), ibeg
);
2953 /* We need to allocate enough room for encoding the text.
2954 We need 33 1/3% more space, plus a newline every 76
2955 characters, and then we round up. */
2956 length
= iend
- ibeg
;
2957 allength
= length
+ length
/3 + 1;
2958 allength
+= allength
/ MIME_LINE_LENGTH
+ 1 + 6;
2960 encoded
= SAFE_ALLOCA (allength
);
2961 encoded_length
= base64_encode_1 ((char *) BYTE_POS_ADDR (ibeg
),
2962 encoded
, length
, NILP (no_line_break
),
2963 !NILP (BVAR (current_buffer
, enable_multibyte_characters
)));
2964 if (encoded_length
> allength
)
2967 if (encoded_length
< 0)
2969 /* The encoding wasn't possible. */
2971 error ("Multibyte character in data for base64 encoding");
2974 /* Now we have encoded the region, so we insert the new contents
2975 and delete the old. (Insert first in order to preserve markers.) */
2976 SET_PT_BOTH (XFASTINT (beg
), ibeg
);
2977 insert (encoded
, encoded_length
);
2979 del_range_byte (ibeg
+ encoded_length
, iend
+ encoded_length
, 1);
2981 /* If point was outside of the region, restore it exactly; else just
2982 move to the beginning of the region. */
2983 if (old_pos
>= XFASTINT (end
))
2984 old_pos
+= encoded_length
- (XFASTINT (end
) - XFASTINT (beg
));
2985 else if (old_pos
> XFASTINT (beg
))
2986 old_pos
= XFASTINT (beg
);
2989 /* We return the length of the encoded text. */
2990 return make_number (encoded_length
);
2993 DEFUN ("base64-encode-string", Fbase64_encode_string
, Sbase64_encode_string
,
2995 doc
: /* Base64-encode STRING and return the result.
2996 Optional second argument NO-LINE-BREAK means do not break long lines
2997 into shorter lines. */)
2998 (Lisp_Object string
, Lisp_Object no_line_break
)
3000 ptrdiff_t allength
, length
, encoded_length
;
3002 Lisp_Object encoded_string
;
3005 CHECK_STRING (string
);
3007 /* We need to allocate enough room for encoding the text.
3008 We need 33 1/3% more space, plus a newline every 76
3009 characters, and then we round up. */
3010 length
= SBYTES (string
);
3011 allength
= length
+ length
/3 + 1;
3012 allength
+= allength
/ MIME_LINE_LENGTH
+ 1 + 6;
3014 /* We need to allocate enough room for decoding the text. */
3015 encoded
= SAFE_ALLOCA (allength
);
3017 encoded_length
= base64_encode_1 (SSDATA (string
),
3018 encoded
, length
, NILP (no_line_break
),
3019 STRING_MULTIBYTE (string
));
3020 if (encoded_length
> allength
)
3023 if (encoded_length
< 0)
3025 /* The encoding wasn't possible. */
3027 error ("Multibyte character in data for base64 encoding");
3030 encoded_string
= make_unibyte_string (encoded
, encoded_length
);
3033 return encoded_string
;
3037 base64_encode_1 (const char *from
, char *to
, ptrdiff_t length
,
3038 bool line_break
, bool multibyte
)
3051 c
= STRING_CHAR_AND_LENGTH ((unsigned char *) from
+ i
, bytes
);
3052 if (CHAR_BYTE8_P (c
))
3053 c
= CHAR_TO_BYTE8 (c
);
3061 /* Wrap line every 76 characters. */
3065 if (counter
< MIME_LINE_LENGTH
/ 4)
3074 /* Process first byte of a triplet. */
3076 *e
++ = base64_value_to_char
[0x3f & c
>> 2];
3077 value
= (0x03 & c
) << 4;
3079 /* Process second byte of a triplet. */
3083 *e
++ = base64_value_to_char
[value
];
3091 c
= STRING_CHAR_AND_LENGTH ((unsigned char *) from
+ i
, bytes
);
3092 if (CHAR_BYTE8_P (c
))
3093 c
= CHAR_TO_BYTE8 (c
);
3101 *e
++ = base64_value_to_char
[value
| (0x0f & c
>> 4)];
3102 value
= (0x0f & c
) << 2;
3104 /* Process third byte of a triplet. */
3108 *e
++ = base64_value_to_char
[value
];
3115 c
= STRING_CHAR_AND_LENGTH ((unsigned char *) from
+ i
, bytes
);
3116 if (CHAR_BYTE8_P (c
))
3117 c
= CHAR_TO_BYTE8 (c
);
3125 *e
++ = base64_value_to_char
[value
| (0x03 & c
>> 6)];
3126 *e
++ = base64_value_to_char
[0x3f & c
];
3133 DEFUN ("base64-decode-region", Fbase64_decode_region
, Sbase64_decode_region
,
3135 doc
: /* Base64-decode the region between BEG and END.
3136 Return the length of the decoded text.
3137 If the region can't be decoded, signal an error and don't modify the buffer. */)
3138 (Lisp_Object beg
, Lisp_Object end
)
3140 ptrdiff_t ibeg
, iend
, length
, allength
;
3142 ptrdiff_t old_pos
= PT
;
3143 ptrdiff_t decoded_length
;
3144 ptrdiff_t inserted_chars
;
3145 bool multibyte
= !NILP (BVAR (current_buffer
, enable_multibyte_characters
));
3148 validate_region (&beg
, &end
);
3150 ibeg
= CHAR_TO_BYTE (XFASTINT (beg
));
3151 iend
= CHAR_TO_BYTE (XFASTINT (end
));
3153 length
= iend
- ibeg
;
3155 /* We need to allocate enough room for decoding the text. If we are
3156 working on a multibyte buffer, each decoded code may occupy at
3158 allength
= multibyte
? length
* 2 : length
;
3159 decoded
= SAFE_ALLOCA (allength
);
3161 move_gap_both (XFASTINT (beg
), ibeg
);
3162 decoded_length
= base64_decode_1 ((char *) BYTE_POS_ADDR (ibeg
),
3164 multibyte
, &inserted_chars
);
3165 if (decoded_length
> allength
)
3168 if (decoded_length
< 0)
3170 /* The decoding wasn't possible. */
3172 error ("Invalid base64 data");
3175 /* Now we have decoded the region, so we insert the new contents
3176 and delete the old. (Insert first in order to preserve markers.) */
3177 TEMP_SET_PT_BOTH (XFASTINT (beg
), ibeg
);
3178 insert_1_both (decoded
, inserted_chars
, decoded_length
, 0, 1, 0);
3181 /* Delete the original text. */
3182 del_range_both (PT
, PT_BYTE
, XFASTINT (end
) + inserted_chars
,
3183 iend
+ decoded_length
, 1);
3185 /* If point was outside of the region, restore it exactly; else just
3186 move to the beginning of the region. */
3187 if (old_pos
>= XFASTINT (end
))
3188 old_pos
+= inserted_chars
- (XFASTINT (end
) - XFASTINT (beg
));
3189 else if (old_pos
> XFASTINT (beg
))
3190 old_pos
= XFASTINT (beg
);
3191 SET_PT (old_pos
> ZV
? ZV
: old_pos
);
3193 return make_number (inserted_chars
);
3196 DEFUN ("base64-decode-string", Fbase64_decode_string
, Sbase64_decode_string
,
3198 doc
: /* Base64-decode STRING and return the result. */)
3199 (Lisp_Object string
)
3202 ptrdiff_t length
, decoded_length
;
3203 Lisp_Object decoded_string
;
3206 CHECK_STRING (string
);
3208 length
= SBYTES (string
);
3209 /* We need to allocate enough room for decoding the text. */
3210 decoded
= SAFE_ALLOCA (length
);
3212 /* The decoded result should be unibyte. */
3213 decoded_length
= base64_decode_1 (SSDATA (string
), decoded
, length
,
3215 if (decoded_length
> length
)
3217 else if (decoded_length
>= 0)
3218 decoded_string
= make_unibyte_string (decoded
, decoded_length
);
3220 decoded_string
= Qnil
;
3223 if (!STRINGP (decoded_string
))
3224 error ("Invalid base64 data");
3226 return decoded_string
;
3229 /* Base64-decode the data at FROM of LENGTH bytes into TO. If
3230 MULTIBYTE, the decoded result should be in multibyte
3231 form. If NCHARS_RETURN is not NULL, store the number of produced
3232 characters in *NCHARS_RETURN. */
3235 base64_decode_1 (const char *from
, char *to
, ptrdiff_t length
,
3236 bool multibyte
, ptrdiff_t *nchars_return
)
3238 ptrdiff_t i
= 0; /* Used inside READ_QUADRUPLET_BYTE */
3241 unsigned long value
;
3242 ptrdiff_t nchars
= 0;
3246 /* Process first byte of a quadruplet. */
3248 READ_QUADRUPLET_BYTE (e
-to
);
3252 value
= base64_char_to_value
[c
] << 18;
3254 /* Process second byte of a quadruplet. */
3256 READ_QUADRUPLET_BYTE (-1);
3260 value
|= base64_char_to_value
[c
] << 12;
3262 c
= (unsigned char) (value
>> 16);
3263 if (multibyte
&& c
>= 128)
3264 e
+= BYTE8_STRING (c
, e
);
3269 /* Process third byte of a quadruplet. */
3271 READ_QUADRUPLET_BYTE (-1);
3275 READ_QUADRUPLET_BYTE (-1);
3284 value
|= base64_char_to_value
[c
] << 6;
3286 c
= (unsigned char) (0xff & value
>> 8);
3287 if (multibyte
&& c
>= 128)
3288 e
+= BYTE8_STRING (c
, e
);
3293 /* Process fourth byte of a quadruplet. */
3295 READ_QUADRUPLET_BYTE (-1);
3302 value
|= base64_char_to_value
[c
];
3304 c
= (unsigned char) (0xff & value
);
3305 if (multibyte
&& c
>= 128)
3306 e
+= BYTE8_STRING (c
, e
);
3315 /***********************************************************************
3317 ***** Hash Tables *****
3319 ***********************************************************************/
3321 /* Implemented by gerd@gnu.org. This hash table implementation was
3322 inspired by CMUCL hash tables. */
3326 1. For small tables, association lists are probably faster than
3327 hash tables because they have lower overhead.
3329 For uses of hash tables where the O(1) behavior of table
3330 operations is not a requirement, it might therefore be a good idea
3331 not to hash. Instead, we could just do a linear search in the
3332 key_and_value vector of the hash table. This could be done
3333 if a `:linear-search t' argument is given to make-hash-table. */
3336 /* The list of all weak hash tables. Don't staticpro this one. */
3338 static struct Lisp_Hash_Table
*weak_hash_tables
;
3340 /* Various symbols. */
3342 static Lisp_Object Qhash_table_p
, Qkey
, Qvalue
, Qeql
;
3343 Lisp_Object Qeq
, Qequal
;
3344 Lisp_Object QCtest
, QCsize
, QCrehash_size
, QCrehash_threshold
, QCweakness
;
3345 static Lisp_Object Qhash_table_test
, Qkey_or_value
, Qkey_and_value
;
3348 /***********************************************************************
3350 ***********************************************************************/
3352 /* If OBJ is a Lisp hash table, return a pointer to its struct
3353 Lisp_Hash_Table. Otherwise, signal an error. */
3355 static struct Lisp_Hash_Table
*
3356 check_hash_table (Lisp_Object obj
)
3358 CHECK_HASH_TABLE (obj
);
3359 return XHASH_TABLE (obj
);
3363 /* Value is the next integer I >= N, N >= 0 which is "almost" a prime
3364 number. A number is "almost" a prime number if it is not divisible
3365 by any integer in the range 2 .. (NEXT_ALMOST_PRIME_LIMIT - 1). */
3368 next_almost_prime (EMACS_INT n
)
3370 verify (NEXT_ALMOST_PRIME_LIMIT
== 11);
3371 for (n
|= 1; ; n
+= 2)
3372 if (n
% 3 != 0 && n
% 5 != 0 && n
% 7 != 0)
3377 /* Find KEY in ARGS which has size NARGS. Don't consider indices for
3378 which USED[I] is non-zero. If found at index I in ARGS, set
3379 USED[I] and USED[I + 1] to 1, and return I + 1. Otherwise return
3380 0. This function is used to extract a keyword/argument pair from
3381 a DEFUN parameter list. */
3384 get_key_arg (Lisp_Object key
, ptrdiff_t nargs
, Lisp_Object
*args
, char *used
)
3388 for (i
= 1; i
< nargs
; i
++)
3389 if (!used
[i
- 1] && EQ (args
[i
- 1], key
))
3400 /* Return a Lisp vector which has the same contents as VEC but has
3401 at least INCR_MIN more entries, where INCR_MIN is positive.
3402 If NITEMS_MAX is not -1, do not grow the vector to be any larger
3403 than NITEMS_MAX. Entries in the resulting
3404 vector that are not copied from VEC are set to nil. */
3407 larger_vector (Lisp_Object vec
, ptrdiff_t incr_min
, ptrdiff_t nitems_max
)
3409 struct Lisp_Vector
*v
;
3410 ptrdiff_t i
, incr
, incr_max
, old_size
, new_size
;
3411 ptrdiff_t C_language_max
= min (PTRDIFF_MAX
, SIZE_MAX
) / sizeof *v
->contents
;
3412 ptrdiff_t n_max
= (0 <= nitems_max
&& nitems_max
< C_language_max
3413 ? nitems_max
: C_language_max
);
3414 eassert (VECTORP (vec
));
3415 eassert (0 < incr_min
&& -1 <= nitems_max
);
3416 old_size
= ASIZE (vec
);
3417 incr_max
= n_max
- old_size
;
3418 incr
= max (incr_min
, min (old_size
>> 1, incr_max
));
3419 if (incr_max
< incr
)
3420 memory_full (SIZE_MAX
);
3421 new_size
= old_size
+ incr
;
3422 v
= allocate_vector (new_size
);
3423 memcpy (v
->contents
, XVECTOR (vec
)->contents
, old_size
* sizeof *v
->contents
);
3424 for (i
= old_size
; i
< new_size
; ++i
)
3425 v
->contents
[i
] = Qnil
;
3426 XSETVECTOR (vec
, v
);
3431 /***********************************************************************
3433 ***********************************************************************/
3435 static struct hash_table_test hashtest_eq
;
3436 struct hash_table_test hashtest_eql
, hashtest_equal
;
3438 /* Compare KEY1 which has hash code HASH1 and KEY2 with hash code
3439 HASH2 in hash table H using `eql'. Value is true if KEY1 and
3440 KEY2 are the same. */
3443 cmpfn_eql (struct hash_table_test
*ht
,
3447 return (FLOATP (key1
)
3449 && XFLOAT_DATA (key1
) == XFLOAT_DATA (key2
));
3453 /* Compare KEY1 which has hash code HASH1 and KEY2 with hash code
3454 HASH2 in hash table H using `equal'. Value is true if KEY1 and
3455 KEY2 are the same. */
3458 cmpfn_equal (struct hash_table_test
*ht
,
3462 return !NILP (Fequal (key1
, key2
));
3466 /* Compare KEY1 which has hash code HASH1, and KEY2 with hash code
3467 HASH2 in hash table H using H->user_cmp_function. Value is true
3468 if KEY1 and KEY2 are the same. */
3471 cmpfn_user_defined (struct hash_table_test
*ht
,
3475 Lisp_Object args
[3];
3477 args
[0] = ht
->user_cmp_function
;
3480 return !NILP (Ffuncall (3, args
));
3484 /* Value is a hash code for KEY for use in hash table H which uses
3485 `eq' to compare keys. The hash code returned is guaranteed to fit
3486 in a Lisp integer. */
3489 hashfn_eq (struct hash_table_test
*ht
, Lisp_Object key
)
3491 EMACS_UINT hash
= XHASH (key
) ^ XTYPE (key
);
3495 /* Value is a hash code for KEY for use in hash table H which uses
3496 `eql' to compare keys. The hash code returned is guaranteed to fit
3497 in a Lisp integer. */
3500 hashfn_eql (struct hash_table_test
*ht
, Lisp_Object key
)
3504 hash
= sxhash (key
, 0);
3506 hash
= XHASH (key
) ^ XTYPE (key
);
3510 /* Value is a hash code for KEY for use in hash table H which uses
3511 `equal' to compare keys. The hash code returned is guaranteed to fit
3512 in a Lisp integer. */
3515 hashfn_equal (struct hash_table_test
*ht
, Lisp_Object key
)
3517 EMACS_UINT hash
= sxhash (key
, 0);
3521 /* Value is a hash code for KEY for use in hash table H which uses as
3522 user-defined function to compare keys. The hash code returned is
3523 guaranteed to fit in a Lisp integer. */
3526 hashfn_user_defined (struct hash_table_test
*ht
, Lisp_Object key
)
3528 Lisp_Object args
[2], hash
;
3530 args
[0] = ht
->user_hash_function
;
3532 hash
= Ffuncall (2, args
);
3533 if (!INTEGERP (hash
))
3534 signal_error ("Invalid hash code returned from user-supplied hash function", hash
);
3535 return XUINT (hash
);
3538 /* An upper bound on the size of a hash table index. It must fit in
3539 ptrdiff_t and be a valid Emacs fixnum. */
3540 #define INDEX_SIZE_BOUND \
3541 ((ptrdiff_t) min (MOST_POSITIVE_FIXNUM, PTRDIFF_MAX / word_size))
3543 /* Create and initialize a new hash table.
3545 TEST specifies the test the hash table will use to compare keys.
3546 It must be either one of the predefined tests `eq', `eql' or
3547 `equal' or a symbol denoting a user-defined test named TEST with
3548 test and hash functions USER_TEST and USER_HASH.
3550 Give the table initial capacity SIZE, SIZE >= 0, an integer.
3552 If REHASH_SIZE is an integer, it must be > 0, and this hash table's
3553 new size when it becomes full is computed by adding REHASH_SIZE to
3554 its old size. If REHASH_SIZE is a float, it must be > 1.0, and the
3555 table's new size is computed by multiplying its old size with
3558 REHASH_THRESHOLD must be a float <= 1.0, and > 0. The table will
3559 be resized when the ratio of (number of entries in the table) /
3560 (table size) is >= REHASH_THRESHOLD.
3562 WEAK specifies the weakness of the table. If non-nil, it must be
3563 one of the symbols `key', `value', `key-or-value', or `key-and-value'. */
3566 make_hash_table (struct hash_table_test test
,
3567 Lisp_Object size
, Lisp_Object rehash_size
,
3568 Lisp_Object rehash_threshold
, Lisp_Object weak
)
3570 struct Lisp_Hash_Table
*h
;
3572 EMACS_INT index_size
, sz
;
3576 /* Preconditions. */
3577 eassert (SYMBOLP (test
.name
));
3578 eassert (INTEGERP (size
) && XINT (size
) >= 0);
3579 eassert ((INTEGERP (rehash_size
) && XINT (rehash_size
) > 0)
3580 || (FLOATP (rehash_size
) && 1 < XFLOAT_DATA (rehash_size
)));
3581 eassert (FLOATP (rehash_threshold
)
3582 && 0 < XFLOAT_DATA (rehash_threshold
)
3583 && XFLOAT_DATA (rehash_threshold
) <= 1.0);
3585 if (XFASTINT (size
) == 0)
3586 size
= make_number (1);
3588 sz
= XFASTINT (size
);
3589 index_float
= sz
/ XFLOAT_DATA (rehash_threshold
);
3590 index_size
= (index_float
< INDEX_SIZE_BOUND
+ 1
3591 ? next_almost_prime (index_float
)
3592 : INDEX_SIZE_BOUND
+ 1);
3593 if (INDEX_SIZE_BOUND
< max (index_size
, 2 * sz
))
3594 error ("Hash table too large");
3596 /* Allocate a table and initialize it. */
3597 h
= allocate_hash_table ();
3599 /* Initialize hash table slots. */
3602 h
->rehash_threshold
= rehash_threshold
;
3603 h
->rehash_size
= rehash_size
;
3605 h
->key_and_value
= Fmake_vector (make_number (2 * sz
), Qnil
);
3606 h
->hash
= Fmake_vector (size
, Qnil
);
3607 h
->next
= Fmake_vector (size
, Qnil
);
3608 h
->index
= Fmake_vector (make_number (index_size
), Qnil
);
3610 /* Set up the free list. */
3611 for (i
= 0; i
< sz
- 1; ++i
)
3612 set_hash_next_slot (h
, i
, make_number (i
+ 1));
3613 h
->next_free
= make_number (0);
3615 XSET_HASH_TABLE (table
, h
);
3616 eassert (HASH_TABLE_P (table
));
3617 eassert (XHASH_TABLE (table
) == h
);
3619 /* Maybe add this hash table to the list of all weak hash tables. */
3621 h
->next_weak
= NULL
;
3624 h
->next_weak
= weak_hash_tables
;
3625 weak_hash_tables
= h
;
3632 /* Return a copy of hash table H1. Keys and values are not copied,
3633 only the table itself is. */
3636 copy_hash_table (struct Lisp_Hash_Table
*h1
)
3639 struct Lisp_Hash_Table
*h2
;
3641 h2
= allocate_hash_table ();
3643 h2
->key_and_value
= Fcopy_sequence (h1
->key_and_value
);
3644 h2
->hash
= Fcopy_sequence (h1
->hash
);
3645 h2
->next
= Fcopy_sequence (h1
->next
);
3646 h2
->index
= Fcopy_sequence (h1
->index
);
3647 XSET_HASH_TABLE (table
, h2
);
3649 /* Maybe add this hash table to the list of all weak hash tables. */
3650 if (!NILP (h2
->weak
))
3652 h2
->next_weak
= weak_hash_tables
;
3653 weak_hash_tables
= h2
;
3660 /* Resize hash table H if it's too full. If H cannot be resized
3661 because it's already too large, throw an error. */
3664 maybe_resize_hash_table (struct Lisp_Hash_Table
*h
)
3666 if (NILP (h
->next_free
))
3668 ptrdiff_t old_size
= HASH_TABLE_SIZE (h
);
3669 EMACS_INT new_size
, index_size
, nsize
;
3673 if (INTEGERP (h
->rehash_size
))
3674 new_size
= old_size
+ XFASTINT (h
->rehash_size
);
3677 double float_new_size
= old_size
* XFLOAT_DATA (h
->rehash_size
);
3678 if (float_new_size
< INDEX_SIZE_BOUND
+ 1)
3680 new_size
= float_new_size
;
3681 if (new_size
<= old_size
)
3682 new_size
= old_size
+ 1;
3685 new_size
= INDEX_SIZE_BOUND
+ 1;
3687 index_float
= new_size
/ XFLOAT_DATA (h
->rehash_threshold
);
3688 index_size
= (index_float
< INDEX_SIZE_BOUND
+ 1
3689 ? next_almost_prime (index_float
)
3690 : INDEX_SIZE_BOUND
+ 1);
3691 nsize
= max (index_size
, 2 * new_size
);
3692 if (INDEX_SIZE_BOUND
< nsize
)
3693 error ("Hash table too large to resize");
3695 #ifdef ENABLE_CHECKING
3696 if (HASH_TABLE_P (Vpurify_flag
)
3697 && XHASH_TABLE (Vpurify_flag
) == h
)
3699 Lisp_Object args
[2];
3700 args
[0] = build_string ("Growing hash table to: %d");
3701 args
[1] = make_number (new_size
);
3706 set_hash_key_and_value (h
, larger_vector (h
->key_and_value
,
3707 2 * (new_size
- old_size
), -1));
3708 set_hash_next (h
, larger_vector (h
->next
, new_size
- old_size
, -1));
3709 set_hash_hash (h
, larger_vector (h
->hash
, new_size
- old_size
, -1));
3710 set_hash_index (h
, Fmake_vector (make_number (index_size
), Qnil
));
3712 /* Update the free list. Do it so that new entries are added at
3713 the end of the free list. This makes some operations like
3715 for (i
= old_size
; i
< new_size
- 1; ++i
)
3716 set_hash_next_slot (h
, i
, make_number (i
+ 1));
3718 if (!NILP (h
->next_free
))
3720 Lisp_Object last
, next
;
3722 last
= h
->next_free
;
3723 while (next
= HASH_NEXT (h
, XFASTINT (last
)),
3727 set_hash_next_slot (h
, XFASTINT (last
), make_number (old_size
));
3730 XSETFASTINT (h
->next_free
, old_size
);
3733 for (i
= 0; i
< old_size
; ++i
)
3734 if (!NILP (HASH_HASH (h
, i
)))
3736 EMACS_UINT hash_code
= XUINT (HASH_HASH (h
, i
));
3737 ptrdiff_t start_of_bucket
= hash_code
% ASIZE (h
->index
);
3738 set_hash_next_slot (h
, i
, HASH_INDEX (h
, start_of_bucket
));
3739 set_hash_index_slot (h
, start_of_bucket
, make_number (i
));
3745 /* Lookup KEY in hash table H. If HASH is non-null, return in *HASH
3746 the hash code of KEY. Value is the index of the entry in H
3747 matching KEY, or -1 if not found. */
3750 hash_lookup (struct Lisp_Hash_Table
*h
, Lisp_Object key
, EMACS_UINT
*hash
)
3752 EMACS_UINT hash_code
;
3753 ptrdiff_t start_of_bucket
;
3756 hash_code
= h
->test
.hashfn (&h
->test
, key
);
3757 eassert ((hash_code
& ~INTMASK
) == 0);
3761 start_of_bucket
= hash_code
% ASIZE (h
->index
);
3762 idx
= HASH_INDEX (h
, start_of_bucket
);
3764 /* We need not gcpro idx since it's either an integer or nil. */
3767 ptrdiff_t i
= XFASTINT (idx
);
3768 if (EQ (key
, HASH_KEY (h
, i
))
3770 && hash_code
== XUINT (HASH_HASH (h
, i
))
3771 && h
->test
.cmpfn (&h
->test
, key
, HASH_KEY (h
, i
))))
3773 idx
= HASH_NEXT (h
, i
);
3776 return NILP (idx
) ? -1 : XFASTINT (idx
);
3780 /* Put an entry into hash table H that associates KEY with VALUE.
3781 HASH is a previously computed hash code of KEY.
3782 Value is the index of the entry in H matching KEY. */
3785 hash_put (struct Lisp_Hash_Table
*h
, Lisp_Object key
, Lisp_Object value
,
3788 ptrdiff_t start_of_bucket
, i
;
3790 eassert ((hash
& ~INTMASK
) == 0);
3792 /* Increment count after resizing because resizing may fail. */
3793 maybe_resize_hash_table (h
);
3796 /* Store key/value in the key_and_value vector. */
3797 i
= XFASTINT (h
->next_free
);
3798 h
->next_free
= HASH_NEXT (h
, i
);
3799 set_hash_key_slot (h
, i
, key
);
3800 set_hash_value_slot (h
, i
, value
);
3802 /* Remember its hash code. */
3803 set_hash_hash_slot (h
, i
, make_number (hash
));
3805 /* Add new entry to its collision chain. */
3806 start_of_bucket
= hash
% ASIZE (h
->index
);
3807 set_hash_next_slot (h
, i
, HASH_INDEX (h
, start_of_bucket
));
3808 set_hash_index_slot (h
, start_of_bucket
, make_number (i
));
3813 /* Remove the entry matching KEY from hash table H, if there is one. */
3816 hash_remove_from_table (struct Lisp_Hash_Table
*h
, Lisp_Object key
)
3818 EMACS_UINT hash_code
;
3819 ptrdiff_t start_of_bucket
;
3820 Lisp_Object idx
, prev
;
3822 hash_code
= h
->test
.hashfn (&h
->test
, key
);
3823 eassert ((hash_code
& ~INTMASK
) == 0);
3824 start_of_bucket
= hash_code
% ASIZE (h
->index
);
3825 idx
= HASH_INDEX (h
, start_of_bucket
);
3828 /* We need not gcpro idx, prev since they're either integers or nil. */
3831 ptrdiff_t i
= XFASTINT (idx
);
3833 if (EQ (key
, HASH_KEY (h
, i
))
3835 && hash_code
== XUINT (HASH_HASH (h
, i
))
3836 && h
->test
.cmpfn (&h
->test
, key
, HASH_KEY (h
, i
))))
3838 /* Take entry out of collision chain. */
3840 set_hash_index_slot (h
, start_of_bucket
, HASH_NEXT (h
, i
));
3842 set_hash_next_slot (h
, XFASTINT (prev
), HASH_NEXT (h
, i
));
3844 /* Clear slots in key_and_value and add the slots to
3846 set_hash_key_slot (h
, i
, Qnil
);
3847 set_hash_value_slot (h
, i
, Qnil
);
3848 set_hash_hash_slot (h
, i
, Qnil
);
3849 set_hash_next_slot (h
, i
, h
->next_free
);
3850 h
->next_free
= make_number (i
);
3852 eassert (h
->count
>= 0);
3858 idx
= HASH_NEXT (h
, i
);
3864 /* Clear hash table H. */
3867 hash_clear (struct Lisp_Hash_Table
*h
)
3871 ptrdiff_t i
, size
= HASH_TABLE_SIZE (h
);
3873 for (i
= 0; i
< size
; ++i
)
3875 set_hash_next_slot (h
, i
, i
< size
- 1 ? make_number (i
+ 1) : Qnil
);
3876 set_hash_key_slot (h
, i
, Qnil
);
3877 set_hash_value_slot (h
, i
, Qnil
);
3878 set_hash_hash_slot (h
, i
, Qnil
);
3881 for (i
= 0; i
< ASIZE (h
->index
); ++i
)
3882 ASET (h
->index
, i
, Qnil
);
3884 h
->next_free
= make_number (0);
3891 /************************************************************************
3893 ************************************************************************/
3895 /* Sweep weak hash table H. REMOVE_ENTRIES_P means remove
3896 entries from the table that don't survive the current GC.
3897 !REMOVE_ENTRIES_P means mark entries that are in use. Value is
3898 true if anything was marked. */
3901 sweep_weak_table (struct Lisp_Hash_Table
*h
, bool remove_entries_p
)
3903 ptrdiff_t bucket
, n
;
3906 n
= ASIZE (h
->index
) & ~ARRAY_MARK_FLAG
;
3909 for (bucket
= 0; bucket
< n
; ++bucket
)
3911 Lisp_Object idx
, next
, prev
;
3913 /* Follow collision chain, removing entries that
3914 don't survive this garbage collection. */
3916 for (idx
= HASH_INDEX (h
, bucket
); !NILP (idx
); idx
= next
)
3918 ptrdiff_t i
= XFASTINT (idx
);
3919 bool key_known_to_survive_p
= survives_gc_p (HASH_KEY (h
, i
));
3920 bool value_known_to_survive_p
= survives_gc_p (HASH_VALUE (h
, i
));
3923 if (EQ (h
->weak
, Qkey
))
3924 remove_p
= !key_known_to_survive_p
;
3925 else if (EQ (h
->weak
, Qvalue
))
3926 remove_p
= !value_known_to_survive_p
;
3927 else if (EQ (h
->weak
, Qkey_or_value
))
3928 remove_p
= !(key_known_to_survive_p
|| value_known_to_survive_p
);
3929 else if (EQ (h
->weak
, Qkey_and_value
))
3930 remove_p
= !(key_known_to_survive_p
&& value_known_to_survive_p
);
3934 next
= HASH_NEXT (h
, i
);
3936 if (remove_entries_p
)
3940 /* Take out of collision chain. */
3942 set_hash_index_slot (h
, bucket
, next
);
3944 set_hash_next_slot (h
, XFASTINT (prev
), next
);
3946 /* Add to free list. */
3947 set_hash_next_slot (h
, i
, h
->next_free
);
3950 /* Clear key, value, and hash. */
3951 set_hash_key_slot (h
, i
, Qnil
);
3952 set_hash_value_slot (h
, i
, Qnil
);
3953 set_hash_hash_slot (h
, i
, Qnil
);
3966 /* Make sure key and value survive. */
3967 if (!key_known_to_survive_p
)
3969 mark_object (HASH_KEY (h
, i
));
3973 if (!value_known_to_survive_p
)
3975 mark_object (HASH_VALUE (h
, i
));
3986 /* Remove elements from weak hash tables that don't survive the
3987 current garbage collection. Remove weak tables that don't survive
3988 from Vweak_hash_tables. Called from gc_sweep. */
3991 sweep_weak_hash_tables (void)
3993 struct Lisp_Hash_Table
*h
, *used
, *next
;
3996 /* Mark all keys and values that are in use. Keep on marking until
3997 there is no more change. This is necessary for cases like
3998 value-weak table A containing an entry X -> Y, where Y is used in a
3999 key-weak table B, Z -> Y. If B comes after A in the list of weak
4000 tables, X -> Y might be removed from A, although when looking at B
4001 one finds that it shouldn't. */
4005 for (h
= weak_hash_tables
; h
; h
= h
->next_weak
)
4007 if (h
->header
.size
& ARRAY_MARK_FLAG
)
4008 marked
|= sweep_weak_table (h
, 0);
4013 /* Remove tables and entries that aren't used. */
4014 for (h
= weak_hash_tables
, used
= NULL
; h
; h
= next
)
4016 next
= h
->next_weak
;
4018 if (h
->header
.size
& ARRAY_MARK_FLAG
)
4020 /* TABLE is marked as used. Sweep its contents. */
4022 sweep_weak_table (h
, 1);
4024 /* Add table to the list of used weak hash tables. */
4025 h
->next_weak
= used
;
4030 weak_hash_tables
= used
;
4035 /***********************************************************************
4036 Hash Code Computation
4037 ***********************************************************************/
4039 /* Maximum depth up to which to dive into Lisp structures. */
4041 #define SXHASH_MAX_DEPTH 3
4043 /* Maximum length up to which to take list and vector elements into
4046 #define SXHASH_MAX_LEN 7
4048 /* Return a hash for string PTR which has length LEN. The hash value
4049 can be any EMACS_UINT value. */
4052 hash_string (char const *ptr
, ptrdiff_t len
)
4054 char const *p
= ptr
;
4055 char const *end
= p
+ len
;
4057 EMACS_UINT hash
= 0;
4062 hash
= sxhash_combine (hash
, c
);
4068 /* Return a hash for string PTR which has length LEN. The hash
4069 code returned is guaranteed to fit in a Lisp integer. */
4072 sxhash_string (char const *ptr
, ptrdiff_t len
)
4074 EMACS_UINT hash
= hash_string (ptr
, len
);
4075 return SXHASH_REDUCE (hash
);
4078 /* Return a hash for the floating point value VAL. */
4081 sxhash_float (double val
)
4083 EMACS_UINT hash
= 0;
4085 WORDS_PER_DOUBLE
= (sizeof val
/ sizeof hash
4086 + (sizeof val
% sizeof hash
!= 0))
4090 EMACS_UINT word
[WORDS_PER_DOUBLE
];
4094 memset (&u
.val
+ 1, 0, sizeof u
- sizeof u
.val
);
4095 for (i
= 0; i
< WORDS_PER_DOUBLE
; i
++)
4096 hash
= sxhash_combine (hash
, u
.word
[i
]);
4097 return SXHASH_REDUCE (hash
);
4100 /* Return a hash for list LIST. DEPTH is the current depth in the
4101 list. We don't recurse deeper than SXHASH_MAX_DEPTH in it. */
4104 sxhash_list (Lisp_Object list
, int depth
)
4106 EMACS_UINT hash
= 0;
4109 if (depth
< SXHASH_MAX_DEPTH
)
4111 CONSP (list
) && i
< SXHASH_MAX_LEN
;
4112 list
= XCDR (list
), ++i
)
4114 EMACS_UINT hash2
= sxhash (XCAR (list
), depth
+ 1);
4115 hash
= sxhash_combine (hash
, hash2
);
4120 EMACS_UINT hash2
= sxhash (list
, depth
+ 1);
4121 hash
= sxhash_combine (hash
, hash2
);
4124 return SXHASH_REDUCE (hash
);
4128 /* Return a hash for vector VECTOR. DEPTH is the current depth in
4129 the Lisp structure. */
4132 sxhash_vector (Lisp_Object vec
, int depth
)
4134 EMACS_UINT hash
= ASIZE (vec
);
4137 n
= min (SXHASH_MAX_LEN
, ASIZE (vec
));
4138 for (i
= 0; i
< n
; ++i
)
4140 EMACS_UINT hash2
= sxhash (AREF (vec
, i
), depth
+ 1);
4141 hash
= sxhash_combine (hash
, hash2
);
4144 return SXHASH_REDUCE (hash
);
4147 /* Return a hash for bool-vector VECTOR. */
4150 sxhash_bool_vector (Lisp_Object vec
)
4152 EMACS_UINT hash
= XBOOL_VECTOR (vec
)->size
;
4155 n
= min (SXHASH_MAX_LEN
, XBOOL_VECTOR (vec
)->header
.size
);
4156 for (i
= 0; i
< n
; ++i
)
4157 hash
= sxhash_combine (hash
, XBOOL_VECTOR (vec
)->data
[i
]);
4159 return SXHASH_REDUCE (hash
);
4163 /* Return a hash code for OBJ. DEPTH is the current depth in the Lisp
4164 structure. Value is an unsigned integer clipped to INTMASK. */
4167 sxhash (Lisp_Object obj
, int depth
)
4171 if (depth
> SXHASH_MAX_DEPTH
)
4174 switch (XTYPE (obj
))
4185 obj
= SYMBOL_NAME (obj
);
4189 hash
= sxhash_string (SSDATA (obj
), SBYTES (obj
));
4192 /* This can be everything from a vector to an overlay. */
4193 case Lisp_Vectorlike
:
4195 /* According to the CL HyperSpec, two arrays are equal only if
4196 they are `eq', except for strings and bit-vectors. In
4197 Emacs, this works differently. We have to compare element
4199 hash
= sxhash_vector (obj
, depth
);
4200 else if (BOOL_VECTOR_P (obj
))
4201 hash
= sxhash_bool_vector (obj
);
4203 /* Others are `equal' if they are `eq', so let's take their
4209 hash
= sxhash_list (obj
, depth
);
4213 hash
= sxhash_float (XFLOAT_DATA (obj
));
4225 /***********************************************************************
4227 ***********************************************************************/
4230 DEFUN ("sxhash", Fsxhash
, Ssxhash
, 1, 1, 0,
4231 doc
: /* Compute a hash code for OBJ and return it as integer. */)
4234 EMACS_UINT hash
= sxhash (obj
, 0);
4235 return make_number (hash
);
4239 DEFUN ("make-hash-table", Fmake_hash_table
, Smake_hash_table
, 0, MANY
, 0,
4240 doc
: /* Create and return a new hash table.
4242 Arguments are specified as keyword/argument pairs. The following
4243 arguments are defined:
4245 :test TEST -- TEST must be a symbol that specifies how to compare
4246 keys. Default is `eql'. Predefined are the tests `eq', `eql', and
4247 `equal'. User-supplied test and hash functions can be specified via
4248 `define-hash-table-test'.
4250 :size SIZE -- A hint as to how many elements will be put in the table.
4253 :rehash-size REHASH-SIZE - Indicates how to expand the table when it
4254 fills up. If REHASH-SIZE is an integer, increase the size by that
4255 amount. If it is a float, it must be > 1.0, and the new size is the
4256 old size multiplied by that factor. Default is 1.5.
4258 :rehash-threshold THRESHOLD -- THRESHOLD must a float > 0, and <= 1.0.
4259 Resize the hash table when the ratio (number of entries / table size)
4260 is greater than or equal to THRESHOLD. Default is 0.8.
4262 :weakness WEAK -- WEAK must be one of nil, t, `key', `value',
4263 `key-or-value', or `key-and-value'. If WEAK is not nil, the table
4264 returned is a weak table. Key/value pairs are removed from a weak
4265 hash table when there are no non-weak references pointing to their
4266 key, value, one of key or value, or both key and value, depending on
4267 WEAK. WEAK t is equivalent to `key-and-value'. Default value of WEAK
4270 usage: (make-hash-table &rest KEYWORD-ARGS) */)
4271 (ptrdiff_t nargs
, Lisp_Object
*args
)
4273 Lisp_Object test
, size
, rehash_size
, rehash_threshold
, weak
;
4274 struct hash_table_test testdesc
;
4278 /* The vector `used' is used to keep track of arguments that
4279 have been consumed. */
4280 used
= alloca (nargs
* sizeof *used
);
4281 memset (used
, 0, nargs
* sizeof *used
);
4283 /* See if there's a `:test TEST' among the arguments. */
4284 i
= get_key_arg (QCtest
, nargs
, args
, used
);
4285 test
= i
? args
[i
] : Qeql
;
4287 testdesc
= hashtest_eq
;
4288 else if (EQ (test
, Qeql
))
4289 testdesc
= hashtest_eql
;
4290 else if (EQ (test
, Qequal
))
4291 testdesc
= hashtest_equal
;
4294 /* See if it is a user-defined test. */
4297 prop
= Fget (test
, Qhash_table_test
);
4298 if (!CONSP (prop
) || !CONSP (XCDR (prop
)))
4299 signal_error ("Invalid hash table test", test
);
4300 testdesc
.name
= test
;
4301 testdesc
.user_cmp_function
= XCAR (prop
);
4302 testdesc
.user_hash_function
= XCAR (XCDR (prop
));
4303 testdesc
.hashfn
= hashfn_user_defined
;
4304 testdesc
.cmpfn
= cmpfn_user_defined
;
4307 /* See if there's a `:size SIZE' argument. */
4308 i
= get_key_arg (QCsize
, nargs
, args
, used
);
4309 size
= i
? args
[i
] : Qnil
;
4311 size
= make_number (DEFAULT_HASH_SIZE
);
4312 else if (!INTEGERP (size
) || XINT (size
) < 0)
4313 signal_error ("Invalid hash table size", size
);
4315 /* Look for `:rehash-size SIZE'. */
4316 i
= get_key_arg (QCrehash_size
, nargs
, args
, used
);
4317 rehash_size
= i
? args
[i
] : make_float (DEFAULT_REHASH_SIZE
);
4318 if (! ((INTEGERP (rehash_size
) && 0 < XINT (rehash_size
))
4319 || (FLOATP (rehash_size
) && 1 < XFLOAT_DATA (rehash_size
))))
4320 signal_error ("Invalid hash table rehash size", rehash_size
);
4322 /* Look for `:rehash-threshold THRESHOLD'. */
4323 i
= get_key_arg (QCrehash_threshold
, nargs
, args
, used
);
4324 rehash_threshold
= i
? args
[i
] : make_float (DEFAULT_REHASH_THRESHOLD
);
4325 if (! (FLOATP (rehash_threshold
)
4326 && 0 < XFLOAT_DATA (rehash_threshold
)
4327 && XFLOAT_DATA (rehash_threshold
) <= 1))
4328 signal_error ("Invalid hash table rehash threshold", rehash_threshold
);
4330 /* Look for `:weakness WEAK'. */
4331 i
= get_key_arg (QCweakness
, nargs
, args
, used
);
4332 weak
= i
? args
[i
] : Qnil
;
4334 weak
= Qkey_and_value
;
4337 && !EQ (weak
, Qvalue
)
4338 && !EQ (weak
, Qkey_or_value
)
4339 && !EQ (weak
, Qkey_and_value
))
4340 signal_error ("Invalid hash table weakness", weak
);
4342 /* Now, all args should have been used up, or there's a problem. */
4343 for (i
= 0; i
< nargs
; ++i
)
4345 signal_error ("Invalid argument list", args
[i
]);
4347 return make_hash_table (testdesc
, size
, rehash_size
, rehash_threshold
, weak
);
4351 DEFUN ("copy-hash-table", Fcopy_hash_table
, Scopy_hash_table
, 1, 1, 0,
4352 doc
: /* Return a copy of hash table TABLE. */)
4355 return copy_hash_table (check_hash_table (table
));
4359 DEFUN ("hash-table-count", Fhash_table_count
, Shash_table_count
, 1, 1, 0,
4360 doc
: /* Return the number of elements in TABLE. */)
4363 return make_number (check_hash_table (table
)->count
);
4367 DEFUN ("hash-table-rehash-size", Fhash_table_rehash_size
,
4368 Shash_table_rehash_size
, 1, 1, 0,
4369 doc
: /* Return the current rehash size of TABLE. */)
4372 return check_hash_table (table
)->rehash_size
;
4376 DEFUN ("hash-table-rehash-threshold", Fhash_table_rehash_threshold
,
4377 Shash_table_rehash_threshold
, 1, 1, 0,
4378 doc
: /* Return the current rehash threshold of TABLE. */)
4381 return check_hash_table (table
)->rehash_threshold
;
4385 DEFUN ("hash-table-size", Fhash_table_size
, Shash_table_size
, 1, 1, 0,
4386 doc
: /* Return the size of TABLE.
4387 The size can be used as an argument to `make-hash-table' to create
4388 a hash table than can hold as many elements as TABLE holds
4389 without need for resizing. */)
4392 struct Lisp_Hash_Table
*h
= check_hash_table (table
);
4393 return make_number (HASH_TABLE_SIZE (h
));
4397 DEFUN ("hash-table-test", Fhash_table_test
, Shash_table_test
, 1, 1, 0,
4398 doc
: /* Return the test TABLE uses. */)
4401 return check_hash_table (table
)->test
.name
;
4405 DEFUN ("hash-table-weakness", Fhash_table_weakness
, Shash_table_weakness
,
4407 doc
: /* Return the weakness of TABLE. */)
4410 return check_hash_table (table
)->weak
;
4414 DEFUN ("hash-table-p", Fhash_table_p
, Shash_table_p
, 1, 1, 0,
4415 doc
: /* Return t if OBJ is a Lisp hash table object. */)
4418 return HASH_TABLE_P (obj
) ? Qt
: Qnil
;
4422 DEFUN ("clrhash", Fclrhash
, Sclrhash
, 1, 1, 0,
4423 doc
: /* Clear hash table TABLE and return it. */)
4426 hash_clear (check_hash_table (table
));
4427 /* Be compatible with XEmacs. */
4432 DEFUN ("gethash", Fgethash
, Sgethash
, 2, 3, 0,
4433 doc
: /* Look up KEY in TABLE and return its associated value.
4434 If KEY is not found, return DFLT which defaults to nil. */)
4435 (Lisp_Object key
, Lisp_Object table
, Lisp_Object dflt
)
4437 struct Lisp_Hash_Table
*h
= check_hash_table (table
);
4438 ptrdiff_t i
= hash_lookup (h
, key
, NULL
);
4439 return i
>= 0 ? HASH_VALUE (h
, i
) : dflt
;
4443 DEFUN ("puthash", Fputhash
, Sputhash
, 3, 3, 0,
4444 doc
: /* Associate KEY with VALUE in hash table TABLE.
4445 If KEY is already present in table, replace its current value with
4446 VALUE. In any case, return VALUE. */)
4447 (Lisp_Object key
, Lisp_Object value
, Lisp_Object table
)
4449 struct Lisp_Hash_Table
*h
= check_hash_table (table
);
4453 i
= hash_lookup (h
, key
, &hash
);
4455 set_hash_value_slot (h
, i
, value
);
4457 hash_put (h
, key
, value
, hash
);
4463 DEFUN ("remhash", Fremhash
, Sremhash
, 2, 2, 0,
4464 doc
: /* Remove KEY from TABLE. */)
4465 (Lisp_Object key
, Lisp_Object table
)
4467 struct Lisp_Hash_Table
*h
= check_hash_table (table
);
4468 hash_remove_from_table (h
, key
);
4473 DEFUN ("maphash", Fmaphash
, Smaphash
, 2, 2, 0,
4474 doc
: /* Call FUNCTION for all entries in hash table TABLE.
4475 FUNCTION is called with two arguments, KEY and VALUE. */)
4476 (Lisp_Object function
, Lisp_Object table
)
4478 struct Lisp_Hash_Table
*h
= check_hash_table (table
);
4479 Lisp_Object args
[3];
4482 for (i
= 0; i
< HASH_TABLE_SIZE (h
); ++i
)
4483 if (!NILP (HASH_HASH (h
, i
)))
4486 args
[1] = HASH_KEY (h
, i
);
4487 args
[2] = HASH_VALUE (h
, i
);
4495 DEFUN ("define-hash-table-test", Fdefine_hash_table_test
,
4496 Sdefine_hash_table_test
, 3, 3, 0,
4497 doc
: /* Define a new hash table test with name NAME, a symbol.
4499 In hash tables created with NAME specified as test, use TEST to
4500 compare keys, and HASH for computing hash codes of keys.
4502 TEST must be a function taking two arguments and returning non-nil if
4503 both arguments are the same. HASH must be a function taking one
4504 argument and return an integer that is the hash code of the argument.
4505 Hash code computation should use the whole value range of integers,
4506 including negative integers. */)
4507 (Lisp_Object name
, Lisp_Object test
, Lisp_Object hash
)
4509 return Fput (name
, Qhash_table_test
, list2 (test
, hash
));
4514 /************************************************************************
4515 MD5, SHA-1, and SHA-2
4516 ************************************************************************/
4523 /* ALGORITHM is a symbol: md5, sha1, sha224 and so on. */
4526 secure_hash (Lisp_Object algorithm
, Lisp_Object object
, Lisp_Object start
, Lisp_Object end
, Lisp_Object coding_system
, Lisp_Object noerror
, Lisp_Object binary
)
4530 EMACS_INT start_char
= 0, end_char
= 0;
4531 ptrdiff_t start_byte
, end_byte
;
4532 register EMACS_INT b
, e
;
4533 register struct buffer
*bp
;
4536 void *(*hash_func
) (const char *, size_t, void *);
4539 CHECK_SYMBOL (algorithm
);
4541 if (STRINGP (object
))
4543 if (NILP (coding_system
))
4545 /* Decide the coding-system to encode the data with. */
4547 if (STRING_MULTIBYTE (object
))
4548 /* use default, we can't guess correct value */
4549 coding_system
= preferred_coding_system ();
4551 coding_system
= Qraw_text
;
4554 if (NILP (Fcoding_system_p (coding_system
)))
4556 /* Invalid coding system. */
4558 if (!NILP (noerror
))
4559 coding_system
= Qraw_text
;
4561 xsignal1 (Qcoding_system_error
, coding_system
);
4564 if (STRING_MULTIBYTE (object
))
4565 object
= code_convert_string (object
, coding_system
, Qnil
, 1, 0, 1);
4567 size
= SCHARS (object
);
4571 CHECK_NUMBER (start
);
4573 start_char
= XINT (start
);
4585 end_char
= XINT (end
);
4591 if (!(0 <= start_char
&& start_char
<= end_char
&& end_char
<= size
))
4592 args_out_of_range_3 (object
, make_number (start_char
),
4593 make_number (end_char
));
4595 start_byte
= NILP (start
) ? 0 : string_char_to_byte (object
, start_char
);
4597 NILP (end
) ? SBYTES (object
) : string_char_to_byte (object
, end_char
);
4601 struct buffer
*prev
= current_buffer
;
4603 record_unwind_current_buffer ();
4605 CHECK_BUFFER (object
);
4607 bp
= XBUFFER (object
);
4608 set_buffer_internal (bp
);
4614 CHECK_NUMBER_COERCE_MARKER (start
);
4622 CHECK_NUMBER_COERCE_MARKER (end
);
4627 temp
= b
, b
= e
, e
= temp
;
4629 if (!(BEGV
<= b
&& e
<= ZV
))
4630 args_out_of_range (start
, end
);
4632 if (NILP (coding_system
))
4634 /* Decide the coding-system to encode the data with.
4635 See fileio.c:Fwrite-region */
4637 if (!NILP (Vcoding_system_for_write
))
4638 coding_system
= Vcoding_system_for_write
;
4641 bool force_raw_text
= 0;
4643 coding_system
= BVAR (XBUFFER (object
), buffer_file_coding_system
);
4644 if (NILP (coding_system
)
4645 || NILP (Flocal_variable_p (Qbuffer_file_coding_system
, Qnil
)))
4647 coding_system
= Qnil
;
4648 if (NILP (BVAR (current_buffer
, enable_multibyte_characters
)))
4652 if (NILP (coding_system
) && !NILP (Fbuffer_file_name (object
)))
4654 /* Check file-coding-system-alist. */
4655 Lisp_Object args
[4], val
;
4657 args
[0] = Qwrite_region
; args
[1] = start
; args
[2] = end
;
4658 args
[3] = Fbuffer_file_name (object
);
4659 val
= Ffind_operation_coding_system (4, args
);
4660 if (CONSP (val
) && !NILP (XCDR (val
)))
4661 coding_system
= XCDR (val
);
4664 if (NILP (coding_system
)
4665 && !NILP (BVAR (XBUFFER (object
), buffer_file_coding_system
)))
4667 /* If we still have not decided a coding system, use the
4668 default value of buffer-file-coding-system. */
4669 coding_system
= BVAR (XBUFFER (object
), buffer_file_coding_system
);
4673 && !NILP (Ffboundp (Vselect_safe_coding_system_function
)))
4674 /* Confirm that VAL can surely encode the current region. */
4675 coding_system
= call4 (Vselect_safe_coding_system_function
,
4676 make_number (b
), make_number (e
),
4677 coding_system
, Qnil
);
4680 coding_system
= Qraw_text
;
4683 if (NILP (Fcoding_system_p (coding_system
)))
4685 /* Invalid coding system. */
4687 if (!NILP (noerror
))
4688 coding_system
= Qraw_text
;
4690 xsignal1 (Qcoding_system_error
, coding_system
);
4694 object
= make_buffer_string (b
, e
, 0);
4695 set_buffer_internal (prev
);
4696 /* Discard the unwind protect for recovering the current
4700 if (STRING_MULTIBYTE (object
))
4701 object
= code_convert_string (object
, coding_system
, Qnil
, 1, 0, 0);
4703 end_byte
= SBYTES (object
);
4706 if (EQ (algorithm
, Qmd5
))
4708 digest_size
= MD5_DIGEST_SIZE
;
4709 hash_func
= md5_buffer
;
4711 else if (EQ (algorithm
, Qsha1
))
4713 digest_size
= SHA1_DIGEST_SIZE
;
4714 hash_func
= sha1_buffer
;
4716 else if (EQ (algorithm
, Qsha224
))
4718 digest_size
= SHA224_DIGEST_SIZE
;
4719 hash_func
= sha224_buffer
;
4721 else if (EQ (algorithm
, Qsha256
))
4723 digest_size
= SHA256_DIGEST_SIZE
;
4724 hash_func
= sha256_buffer
;
4726 else if (EQ (algorithm
, Qsha384
))
4728 digest_size
= SHA384_DIGEST_SIZE
;
4729 hash_func
= sha384_buffer
;
4731 else if (EQ (algorithm
, Qsha512
))
4733 digest_size
= SHA512_DIGEST_SIZE
;
4734 hash_func
= sha512_buffer
;
4737 error ("Invalid algorithm arg: %s", SDATA (Fsymbol_name (algorithm
)));
4739 /* allocate 2 x digest_size so that it can be re-used to hold the
4741 digest
= make_uninit_string (digest_size
* 2);
4743 hash_func (SSDATA (object
) + start_byte
,
4744 end_byte
- start_byte
,
4749 unsigned char *p
= SDATA (digest
);
4750 for (i
= digest_size
- 1; i
>= 0; i
--)
4752 static char const hexdigit
[16] = "0123456789abcdef";
4754 p
[2 * i
] = hexdigit
[p_i
>> 4];
4755 p
[2 * i
+ 1] = hexdigit
[p_i
& 0xf];
4760 return make_unibyte_string (SSDATA (digest
), digest_size
);
4763 DEFUN ("md5", Fmd5
, Smd5
, 1, 5, 0,
4764 doc
: /* Return MD5 message digest of OBJECT, a buffer or string.
4766 A message digest is a cryptographic checksum of a document, and the
4767 algorithm to calculate it is defined in RFC 1321.
4769 The two optional arguments START and END are character positions
4770 specifying for which part of OBJECT the message digest should be
4771 computed. If nil or omitted, the digest is computed for the whole
4774 The MD5 message digest is computed from the result of encoding the
4775 text in a coding system, not directly from the internal Emacs form of
4776 the text. The optional fourth argument CODING-SYSTEM specifies which
4777 coding system to encode the text with. It should be the same coding
4778 system that you used or will use when actually writing the text into a
4781 If CODING-SYSTEM is nil or omitted, the default depends on OBJECT. If
4782 OBJECT is a buffer, the default for CODING-SYSTEM is whatever coding
4783 system would be chosen by default for writing this text into a file.
4785 If OBJECT is a string, the most preferred coding system (see the
4786 command `prefer-coding-system') is used.
4788 If NOERROR is non-nil, silently assume the `raw-text' coding if the
4789 guesswork fails. Normally, an error is signaled in such case. */)
4790 (Lisp_Object object
, Lisp_Object start
, Lisp_Object end
, Lisp_Object coding_system
, Lisp_Object noerror
)
4792 return secure_hash (Qmd5
, object
, start
, end
, coding_system
, noerror
, Qnil
);
4795 DEFUN ("secure-hash", Fsecure_hash
, Ssecure_hash
, 2, 5, 0,
4796 doc
: /* Return the secure hash of OBJECT, a buffer or string.
4797 ALGORITHM is a symbol specifying the hash to use:
4798 md5, sha1, sha224, sha256, sha384 or sha512.
4800 The two optional arguments START and END are positions specifying for
4801 which part of OBJECT to compute the hash. If nil or omitted, uses the
4804 If BINARY is non-nil, returns a string in binary form. */)
4805 (Lisp_Object algorithm
, Lisp_Object object
, Lisp_Object start
, Lisp_Object end
, Lisp_Object binary
)
4807 return secure_hash (algorithm
, object
, start
, end
, Qnil
, Qnil
, binary
);
4813 DEFSYM (Qmd5
, "md5");
4814 DEFSYM (Qsha1
, "sha1");
4815 DEFSYM (Qsha224
, "sha224");
4816 DEFSYM (Qsha256
, "sha256");
4817 DEFSYM (Qsha384
, "sha384");
4818 DEFSYM (Qsha512
, "sha512");
4820 /* Hash table stuff. */
4821 DEFSYM (Qhash_table_p
, "hash-table-p");
4823 DEFSYM (Qeql
, "eql");
4824 DEFSYM (Qequal
, "equal");
4825 DEFSYM (QCtest
, ":test");
4826 DEFSYM (QCsize
, ":size");
4827 DEFSYM (QCrehash_size
, ":rehash-size");
4828 DEFSYM (QCrehash_threshold
, ":rehash-threshold");
4829 DEFSYM (QCweakness
, ":weakness");
4830 DEFSYM (Qkey
, "key");
4831 DEFSYM (Qvalue
, "value");
4832 DEFSYM (Qhash_table_test
, "hash-table-test");
4833 DEFSYM (Qkey_or_value
, "key-or-value");
4834 DEFSYM (Qkey_and_value
, "key-and-value");
4837 defsubr (&Smake_hash_table
);
4838 defsubr (&Scopy_hash_table
);
4839 defsubr (&Shash_table_count
);
4840 defsubr (&Shash_table_rehash_size
);
4841 defsubr (&Shash_table_rehash_threshold
);
4842 defsubr (&Shash_table_size
);
4843 defsubr (&Shash_table_test
);
4844 defsubr (&Shash_table_weakness
);
4845 defsubr (&Shash_table_p
);
4846 defsubr (&Sclrhash
);
4847 defsubr (&Sgethash
);
4848 defsubr (&Sputhash
);
4849 defsubr (&Sremhash
);
4850 defsubr (&Smaphash
);
4851 defsubr (&Sdefine_hash_table_test
);
4853 DEFSYM (Qstring_lessp
, "string-lessp");
4854 DEFSYM (Qprovide
, "provide");
4855 DEFSYM (Qrequire
, "require");
4856 DEFSYM (Qyes_or_no_p_history
, "yes-or-no-p-history");
4857 DEFSYM (Qcursor_in_echo_area
, "cursor-in-echo-area");
4858 DEFSYM (Qwidget_type
, "widget-type");
4860 staticpro (&string_char_byte_cache_string
);
4861 string_char_byte_cache_string
= Qnil
;
4863 require_nesting_list
= Qnil
;
4864 staticpro (&require_nesting_list
);
4866 Fset (Qyes_or_no_p_history
, Qnil
);
4868 DEFVAR_LISP ("features", Vfeatures
,
4869 doc
: /* A list of symbols which are the features of the executing Emacs.
4870 Used by `featurep' and `require', and altered by `provide'. */);
4871 Vfeatures
= Fcons (intern_c_string ("emacs"), Qnil
);
4872 DEFSYM (Qsubfeatures
, "subfeatures");
4874 #ifdef HAVE_LANGINFO_CODESET
4875 DEFSYM (Qcodeset
, "codeset");
4876 DEFSYM (Qdays
, "days");
4877 DEFSYM (Qmonths
, "months");
4878 DEFSYM (Qpaper
, "paper");
4879 #endif /* HAVE_LANGINFO_CODESET */
4881 DEFVAR_BOOL ("use-dialog-box", use_dialog_box
,
4882 doc
: /* Non-nil means mouse commands use dialog boxes to ask questions.
4883 This applies to `y-or-n-p' and `yes-or-no-p' questions asked by commands
4884 invoked by mouse clicks and mouse menu items.
4886 On some platforms, file selection dialogs are also enabled if this is
4890 DEFVAR_BOOL ("use-file-dialog", use_file_dialog
,
4891 doc
: /* Non-nil means mouse commands use a file dialog to ask for files.
4892 This applies to commands from menus and tool bar buttons even when
4893 they are initiated from the keyboard. If `use-dialog-box' is nil,
4894 that disables the use of a file dialog, regardless of the value of
4896 use_file_dialog
= 1;
4898 defsubr (&Sidentity
);
4901 defsubr (&Ssafe_length
);
4902 defsubr (&Sstring_bytes
);
4903 defsubr (&Sstring_equal
);
4904 defsubr (&Scompare_strings
);
4905 defsubr (&Sstring_lessp
);
4908 defsubr (&Svconcat
);
4909 defsubr (&Scopy_sequence
);
4910 defsubr (&Sstring_make_multibyte
);
4911 defsubr (&Sstring_make_unibyte
);
4912 defsubr (&Sstring_as_multibyte
);
4913 defsubr (&Sstring_as_unibyte
);
4914 defsubr (&Sstring_to_multibyte
);
4915 defsubr (&Sstring_to_unibyte
);
4916 defsubr (&Scopy_alist
);
4917 defsubr (&Ssubstring
);
4918 defsubr (&Ssubstring_no_properties
);
4931 defsubr (&Snreverse
);
4932 defsubr (&Sreverse
);
4934 defsubr (&Splist_get
);
4936 defsubr (&Splist_put
);
4938 defsubr (&Slax_plist_get
);
4939 defsubr (&Slax_plist_put
);
4942 defsubr (&Sequal_including_properties
);
4943 defsubr (&Sfillarray
);
4944 defsubr (&Sclear_string
);
4948 defsubr (&Smapconcat
);
4949 defsubr (&Syes_or_no_p
);
4950 defsubr (&Sload_average
);
4951 defsubr (&Sfeaturep
);
4952 defsubr (&Srequire
);
4953 defsubr (&Sprovide
);
4954 defsubr (&Splist_member
);
4955 defsubr (&Swidget_put
);
4956 defsubr (&Swidget_get
);
4957 defsubr (&Swidget_apply
);
4958 defsubr (&Sbase64_encode_region
);
4959 defsubr (&Sbase64_decode_region
);
4960 defsubr (&Sbase64_encode_string
);
4961 defsubr (&Sbase64_decode_string
);
4963 defsubr (&Ssecure_hash
);
4964 defsubr (&Slocale_info
);
4967 struct hash_table_test
4968 eq
= { Qeq
, Qnil
, Qnil
, NULL
, hashfn_eq
},
4969 eql
= { Qeql
, Qnil
, Qnil
, cmpfn_eql
, hashfn_eql
},
4970 equal
= { Qequal
, Qnil
, Qnil
, cmpfn_equal
, hashfn_equal
};
4973 hashtest_equal
= equal
;