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- /* Random utility Lisp functions.
- Copyright (C) 1985, 1986, 1987, 1992, 1993 Free Software Foundation, Inc.
-
- This file is part of GNU Emacs.
-
- GNU Emacs is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- GNU Emacs is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNU Emacs; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
-
- #include "config.h"
-
- #ifdef LOAD_AVE_TYPE
- #ifdef BSD
- /* It appears param.h defines BSD and BSD4_3 in 4.3
- and is not considerate enough to avoid bombing out
- if they are already defined. */
- #undef BSD
- #ifdef BSD4_3
- #undef BSD4_3
- #define XBSD4_3 /* XBSD4_3 says BSD4_3 is supposed to be defined. */
- #endif
- #include <sys/param.h>
- /* Now if BSD or BSD4_3 was defined and is no longer,
- define it again. */
- #ifndef BSD
- #define BSD
- #endif
- #ifdef XBSD4_3
- #ifndef BSD4_3
- #define BSD4_3
- #endif
- #endif /* XBSD4_3 */
- #endif /* BSD */
- #ifndef VMS
- #ifndef NLIST_STRUCT
- #include <a.out.h>
- #else /* NLIST_STRUCT */
- #include <nlist.h>
- #endif /* NLIST_STRUCT */
- #endif /* not VMS */
- #endif /* LOAD_AVE_TYPE */
-
- #ifdef HAVE_HPUX_PSTAT
- #include <sys/pstat.h>
- #endif /* HAVE_HPUX_PSTAT */
-
- /* Note on some machines this defines `vector' as a typedef,
- so make sure we don't use that name in this file. */
- #undef vector
- #define vector *****
-
- #include "lisp.h"
- #include "commands.h"
-
- #include "buffer.h"
- #include "extents.h"
- #ifdef MULTI_SCREEN
- #include "screen.h"
- #endif
-
- #include "events.h"
-
- /* Convert 32 bit items <-> (<high16> . <low16>) */
-
- Lisp_Object
- word_to_lisp (unsigned int item)
- {
- return Fcons (make_number (item >> 16), make_number (item & 0xffff));
- }
-
- unsigned int
- lisp_to_word (Lisp_Object obj)
- {
- Lisp_Object high;
- Lisp_Object low;
- if ((obj == Qnil) || (!CONSP (obj))) return 0;
-
- high = XCONS (obj)->car;
- if (!FIXNUMP (high)) return 0;
-
- low = XCONS (obj)->cdr;
- if (!FIXNUMP (low)) return 0;
-
- return (XUINT (high) << 16) | (XUINT (low));
- }
-
- #ifdef NEED_STRDUP
- char *
- strdup (s)
- char *s;
- {
- char *result = (char *) xmalloc (strlen (s) + 1);
- if (result == (char *) 0)
- return (char *) 0;
- strcpy (result, s);
- return result;
- }
- #endif
-
-
- /* Lucid sound change */
- Lisp_Object Vbell_volume;
-
- Lisp_Object Qstring_lessp;
- Lisp_Object Qyes_or_no_p;
-
- DEFUN ("identity", Fidentity, Sidentity, 1, 1, 0,
- "Return the argument unchanged.")
- (arg)
- Lisp_Object arg;
- {
- return arg;
- }
-
- extern int random ();
- extern void srandom ();
-
- DEFUN ("random", Frandom, Srandom, 0, 1, 0,
- "Return a pseudo-random number.\n\
- On most systems all integers representable in Lisp are equally likely.\n\
- This is 24 bits' worth.\n\
- With argument N, return random number in interval [0,N).\n\
- With argument t, set the random number seed from the current time and pid.")
- (arg)
- Lisp_Object arg;
- {
- int val;
-
- if (EQ (arg, Qt))
- srandom (getpid () + time (0));
- val = random ();
- if (FIXNUMP (arg) && XINT (arg) != 0)
- {
- /* Try to take our random number from the higher bits of VAL,
- not the lower, since (says Gentzel) the low bits of `random'
- are less random than the higher ones. */
- val &= 0xfffffff; /* Ensure positive. */
- val >>= 5;
- if (XINT (arg) < 10000)
- val >>= 6;
- val %= XINT (arg);
- }
- return make_number (val);
- }
-
- /* Random data-structure functions */
-
- DEFUN ("length", Flength, Slength, 1, 1, 0,
- "Return the length of vector, list or string SEQUENCE.\n\
- A byte-code function object is also allowed.")
- (obj)
- register Lisp_Object obj;
- {
- register Lisp_Object tail, val;
- register int i;
-
- retry:
- if (VECTORP (obj) || STRINGP (obj)
- || COMPILEDP (obj))
- return Farray_length (obj);
- else if (CONSP (obj))
- {
- for (i = 0, tail = obj; !NILP(tail); i++)
- {
- QUIT;
- tail = Fcdr (tail);
- }
-
- XFASTINT (val) = i;
- return val;
- }
- else if (NILP(obj))
- {
- XFASTINT (val) = 0;
- return val;
- }
- else
- {
- obj = wrong_type_argument (Qsequencep, obj);
- goto retry;
- }
- }
-
- DEFUN ("string-equal", Fstring_equal, Sstring_equal, 2, 2, 0,
- "T if two strings have identical contents.\n\
- Case is significant.\n\
- Symbols are also allowed; their print names are used instead.")
- (s1, s2)
- register Lisp_Object s1, s2;
- {
- if (SYMBOLP (s1))
- XSET (s1, Lisp_String, XSYMBOL (s1)->name);
- if (SYMBOLP (s2))
- XSET (s2, Lisp_String, XSYMBOL (s2)->name);
- CHECK_STRING (s1, 0);
- CHECK_STRING (s2, 1);
-
- if (XSTRING (s1)->size != XSTRING (s2)->size ||
- memcmp (XSTRING (s1)->data, XSTRING (s2)->data, XSTRING (s1)->size))
- return Qnil;
- return Qt;
- }
-
- DEFUN ("string-lessp", Fstring_lessp, Sstring_lessp, 2, 2, 0,
- "T if first arg string is less than second in lexicographic order.\n\
- Case is significant.\n\
- Symbols are also allowed; their print names are used instead.")
- (s1, s2)
- register Lisp_Object s1, s2;
- {
- register int i;
- register unsigned char *p1, *p2;
- register int end;
-
- if (SYMBOLP (s1))
- XSET (s1, Lisp_String, XSYMBOL (s1)->name);
- if (SYMBOLP (s2))
- XSET (s2, Lisp_String, XSYMBOL (s2)->name);
- CHECK_STRING (s1, 0);
- CHECK_STRING (s2, 1);
-
- p1 = XSTRING (s1)->data;
- p2 = XSTRING (s2)->data;
- end = XSTRING (s1)->size;
- if (end > XSTRING (s2)->size)
- end = XSTRING (s2)->size;
-
- for (i = 0; i < end; i++)
- {
- if (p1[i] != p2[i])
- return p1[i] < p2[i] ? Qt : Qnil;
- }
- return i < XSTRING (s2)->size ? Qt : Qnil;
- }
-
- static Lisp_Object concat ();
-
- /* ARGSUSED */
- Lisp_Object
- concat2 (s1, s2)
- Lisp_Object s1, s2;
- {
- #ifdef NO_ARG_ARRAY
- Lisp_Object args[2];
- args[0] = s1;
- args[1] = s2;
- return concat (2, args, Lisp_String, 0);
- #else
- return concat (2, &s1, Lisp_String, 0);
- #endif /* NO_ARG_ARRAY */
- }
-
- DEFUN ("append", Fappend, Sappend, 0, MANY, 0,
- "Concatenate all the arguments and make the result a list.\n\
- The result is a list whose elements are the elements of all the arguments.\n\
- Each argument may be a list, vector or string.\n\
- The last argument is not copied if it is a list.")
- (nargs, args)
- int nargs;
- Lisp_Object *args;
- {
- return concat (nargs, args, Lisp_Cons, 1);
- }
-
- DEFUN ("concat", Fconcat, Sconcat, 0, MANY, 0,
- "Concatenate all the arguments and make the result a string.\n\
- The result is a string whose elements are the elements of all the arguments.\n\
- Each argument may be a string, a list of numbers, or a vector of numbers.")
- (nargs, args)
- int nargs;
- Lisp_Object *args;
- {
- return concat (nargs, args, Lisp_String, 0);
- }
-
- DEFUN ("vconcat", Fvconcat, Svconcat, 0, MANY, 0,
- "Concatenate all the arguments and make the result a vector.\n\
- The result is a vector whose elements are the elements of all the arguments.\n\
- Each argument may be a list, vector or string.")
- (nargs, args)
- int nargs;
- Lisp_Object *args;
- {
- return concat (nargs, args, Lisp_Vector, 0);
- }
-
- DEFUN ("copy-sequence", Fcopy_sequence, Scopy_sequence, 1, 1, 0,
- "Return a copy of a list, vector or string.\n\
- The elements of a list or vector are not copied; they are shared\n\
- with the original.")
- (arg)
- Lisp_Object arg;
- {
- if (NILP (arg)) return arg;
- if (!CONSP (arg) && !VECTORP (arg) && !STRINGP (arg))
- arg = wrong_type_argument (Qsequencep, arg);
- /* We handle conses seperately because concat() is big and hairy and
- doesn't handle (copy-sequence '(a b . c)) and it's easier to redo this
- than to fix concat() without worrying about breaking other things.
- */
- if (CONSP (arg))
- {
- Lisp_Object rest = arg;
- Lisp_Object head, tail;
- tail = Qnil;
- while (CONSP (rest))
- {
- Lisp_Object new = Fcons (XCONS (rest)->car, XCONS (rest)->cdr);
- if (NILP (tail))
- head = tail = new;
- else
- XCONS (tail)->cdr = new, tail = new;
- rest = XCONS (rest)->cdr;
- QUIT;
- }
- if (!NILP (tail))
- XCONS (tail)->cdr = rest;
- return head;
- }
- else
- return concat (1, &arg, XTYPE (arg), 0);
- }
-
- static Lisp_Object
- concat (nargs, args, target_type, last_special)
- int nargs;
- Lisp_Object *args;
- enum Lisp_Type target_type;
- int last_special;
- {
- Lisp_Object val;
- Lisp_Object len;
- register Lisp_Object tail;
- register Lisp_Object this;
- int toindex;
- register int leni;
- register int argnum;
- Lisp_Object last_tail;
- Lisp_Object prev;
- int mr_structs_size = nargs * sizeof (struct merge_replicas_struct);
- struct merge_replicas_struct *args_mr_structs =
- (struct merge_replicas_struct *) alloca (mr_structs_size);
-
- memset ((char *) args_mr_structs, 0, mr_structs_size);
-
- /* In append, the last arg isn't treated like the others */
- if (last_special && nargs > 0)
- {
- nargs--;
- last_tail = args[nargs];
- }
- else
- last_tail = Qnil;
-
- /* Check and coerce the arguments. */
- for (argnum = 0; argnum < nargs; argnum++)
- {
- this = args[argnum];
- if (!(CONSP (this) || NILP (this)
- || VECTORP (this) || STRINGP (this)
- || COMPILEDP (this)))
- {
- if (FIXNUMP (this))
- args[argnum] = Fint_to_string (this);
- else
- args[argnum] = wrong_type_argument (Qsequencep, this);
- }
-
- if (STRINGP (this))
- args_mr_structs[argnum].dup_list = XSTRING (this)->dup_list;
- else
- args_mr_structs[argnum].dup_list = Qnil;
- }
-
- for (argnum = 0, leni = 0; argnum < nargs; argnum++)
- {
- this = args[argnum];
- len = Flength (this);
- args_mr_structs[argnum].entry_offset = leni;
- args_mr_structs[argnum].entry_length = XFASTINT (len);
- leni += XFASTINT (len);
- }
- XFASTINT (len) = leni;
-
- if (target_type == Lisp_Cons)
- val = Fmake_list (len, Qnil);
- else if (target_type == Lisp_Vector)
- val = Fmake_vector (len, Qnil);
- else
- {
- val = Fmake_string (len, len);
- XSTRING(val)->dup_list = merge_replicas (nargs, args_mr_structs);
- }
-
- /* In append, if all but last arg are nil, return last arg */
- if (target_type == Lisp_Cons && EQ (val, Qnil))
- return last_tail;
-
- if (CONSP (val))
- tail = val, toindex = -1; /* -1 in toindex is flag we are
- making a list */
- else
- toindex = 0;
-
- prev = Qnil;
-
- for (argnum = 0; argnum < nargs; argnum++)
- {
- Lisp_Object thislen;
- int thisleni;
- register int thisindex = 0;
-
- this = args[argnum];
- if (!CONSP (this))
- {
- thislen = Flength (this);
- thisleni = XINT (thislen);
- }
-
- while (1)
- {
- register Lisp_Object elt;
-
- /* We've come to the end of this arg, so exit. */
- if (NILP (this))
- break;
-
- /* Fetch next element of `this' arg into `elt' */
- if (CONSP (this))
- elt = Fcar (this), this = Fcdr (this);
- else
- {
- if (thisindex >= thisleni)
- break;
-
- if (STRINGP (this))
- XFASTINT (elt) = XSTRING (this)->data[thisindex++];
- else
- elt = XVECTOR (this)->contents[thisindex++];
- }
-
- /* Store into result */
- if (toindex < 0)
- {
- /* toindex negative means we are making a list */
- XCONS (tail)->car = elt;
- prev = tail;
- tail = XCONS (tail)->cdr;
- }
- else if (VECTORP (val))
- XVECTOR (val)->contents[toindex++] = elt;
- else
- {
- while (!FIXNUMP (elt))
- elt = wrong_type_argument (Qintegerp, elt);
-
- {
- #ifdef MASSC_REGISTER_BUG
- /* Even removing all "register"s doesn't disable this bug!
- Nothing simpler than this seems to work. */
- unsigned char *p = & XSTRING (val)->data[toindex++];
- *p = XINT (elt);
- #else
- XSTRING (val)->data[toindex++] = XINT (elt);
- #endif
- }
- }
- }
- }
-
- if (!NILP (prev))
- XCONS (prev)->cdr = last_tail;
-
- return val;
- }
-
- DEFUN ("copy-alist", Fcopy_alist, Scopy_alist, 1, 1, 0,
- "Return a copy of ALIST.\n\
- This is an alist which represents the same mapping from objects to objects,\n\
- but does not share the alist structure with ALIST.\n\
- The objects mapped (cars and cdrs of elements of the alist)\n\
- are shared, however.")
- (alist)
- Lisp_Object alist;
- {
- register Lisp_Object tem;
-
- CHECK_LIST (alist, 0);
- if (NILP (alist))
- return alist;
- alist = concat (1, &alist, Lisp_Cons, 0);
- for (tem = alist; CONSP (tem); tem = XCONS (tem)->cdr)
- {
- register Lisp_Object car;
- car = XCONS (tem)->car;
-
- if (CONSP (car))
- XCONS (tem)->car = Fcons (XCONS (car)->car, XCONS (car)->cdr);
- }
- return alist;
- }
-
-
- DEFUN ("copy-tree", Fcopy_tree, Scopy_tree, 1, 1, 0,
- "Return a copy of a list or vector, and substructures.\n\
- The argument is copied, and any lists or vectors contained within it\n\
- are copied recursively. Circularities and shared substructures are\n\
- not preserved. Strings are not copied.")
- (arg)
- Lisp_Object arg;
- {
- arg = Fcopy_sequence (arg);
- if (CONSP (arg))
- {
- Lisp_Object rest = arg;
- while (CONSP (rest))
- {
- Lisp_Object elt = XCONS (rest)->car;
- QUIT;
- if (CONSP (elt) || VECTORP (elt))
- XCONS (rest)->car = Fcopy_tree (elt);
- if (VECTORP (XCONS (rest)->cdr)) /* hack for (a b . [c d]) */
- XCONS (rest)->cdr = Fcopy_tree (XCONS (rest)->cdr);
- rest = XCONS (rest)->cdr;
- }
- }
- else if (VECTORP (arg))
- {
- int i = XVECTOR (arg)->size;
- int j;
- for (j = 0; j < i; j++)
- {
- Lisp_Object elt = XVECTOR (arg)->contents [j];
- QUIT;
- if (CONSP (elt) || VECTORP (elt))
- XVECTOR (arg)->contents [j] = Fcopy_tree (elt);
- }
- }
- return arg;
- }
-
-
- DEFUN ("substring", Fsubstring, Ssubstring, 2, 3, 0,
- "Return a substring of STRING, starting at index FROM and ending before TO.\n\
- TO may be nil or omitted; then the substring runs to the end of STRING.\n\
- If FROM or TO is negative, it counts from the end.")
- (string, from, to)
- Lisp_Object string;
- register Lisp_Object from, to;
- {
- CHECK_STRING (string, 0);
- CHECK_FIXNUM (from, 1);
- if (NILP (to))
- to = Flength (string);
- else
- CHECK_FIXNUM (to, 2);
-
- if (XINT (from) < 0)
- XSETINT (from, XINT (from) + XSTRING (string)->size);
- if (XINT (to) < 0)
- XSETINT (to, XINT (to) + XSTRING (string)->size);
- if (!(0 <= XINT (from) && XINT (from) <= XINT (to)
- && XINT (to) <= XSTRING (string)->size))
- args_out_of_range_3 (string, from, to);
-
- return make_string ((char *) XSTRING (string)->data + XINT (from),
- XINT (to) - XINT (from));
- }
-
- DEFUN ("nthcdr", Fnthcdr, Snthcdr, 2, 2, 0,
- "Take cdr N times on LIST, returns the result.")
- (n, list)
- Lisp_Object n;
- register Lisp_Object list;
- {
- register int i, num;
- CHECK_FIXNUM (n, 0);
- num = XINT (n);
- for (i = 0; i < num && ! NILP (list); i++)
- {
- QUIT;
- list = Fcdr (list);
- }
- return list;
- }
-
- DEFUN ("nth", Fnth, Snth, 2, 2, 0,
- "Return the Nth element of LIST.\n\
- N counts from zero. If LIST is not that long, nil is returned.")
- (n, list)
- Lisp_Object n, list;
- {
- return Fcar (Fnthcdr (n, list));
- }
-
- DEFUN ("elt", Felt, Selt, 2, 2, 0,
- "Return element of SEQUENCE at index N.")
- (seq, n)
- register Lisp_Object seq, n;
- {
- CHECK_FIXNUM (n, 0);
- while (1)
- {
- if (CONSP (seq) || NILP (seq))
- return Fcar (Fnthcdr (n, seq));
- else if (STRINGP (seq) ||
- VECTORP (seq))
- return Faref (seq, n);
- else
- seq = wrong_type_argument (Qsequencep, seq);
- }
- }
-
- DEFUN ("member", Fmember, Smember, 2, 2, 0,
- "Return non-nil if ELT is an element of LIST. Comparison done with EQUAL.\n\
- The value is actually the tail of LIST whose car is ELT.")
- (elt, list)
- register Lisp_Object elt;
- Lisp_Object list;
- {
- register Lisp_Object tail;
- for (tail = list; !NILP (tail); tail = Fcdr (tail))
- {
- register Lisp_Object tem;
- tem = Fcar (tail);
- if (! NILP (Fequal (elt, tem)))
- return tail;
- QUIT;
- }
- return Qnil;
- }
-
- DEFUN ("memq", Fmemq, Smemq, 2, 2, 0,
- "Return non-nil if ELT is an element of LIST. Comparison done with EQ.\n\
- The value is actually the tail of LIST whose car is ELT.")
- (elt, list)
- register Lisp_Object elt;
- Lisp_Object list;
- {
- register Lisp_Object tail;
- for (tail = list; !NILP (tail); tail = Fcdr (tail))
- {
- register Lisp_Object tem;
- tem = Fcar (tail);
- if (EQ (elt, tem)) return tail;
- QUIT;
- }
- return Qnil;
- }
-
- Lisp_Object
- memq_no_quit (elt, list)
- register Lisp_Object elt;
- Lisp_Object list;
- {
- register Lisp_Object tail;
- for (tail = list; CONSP (tail); tail = XCONS (tail)->cdr)
- {
- register Lisp_Object tem;
- tem = XCONS (tail)->car;
- if (EQ (elt, tem)) return tail;
- }
- return Qnil;
- }
-
- DEFUN ("assq", Fassq, Sassq, 2, 2, 0,
- "Return non-nil if ELT is `eq' to the car of an element of LIST.\n\
- The value is actually the element of LIST whose car is ELT.")
- (key, list)
- register Lisp_Object key;
- Lisp_Object list;
- {
- register Lisp_Object tail;
- for (tail = list; !NILP (tail); tail = Fcdr (tail))
- {
- register Lisp_Object elt, tem;
- elt = Fcar (tail);
- if (!CONSP (elt)) continue;
- tem = Fcar (elt);
- if (EQ (key, tem)) return elt;
- QUIT;
- }
- return Qnil;
- }
-
- /* Like Fassq but never report an error and do not allow quits.
- Use only on lists known never to be circular. */
-
- Lisp_Object
- assq_no_quit (key, list)
- register Lisp_Object key;
- Lisp_Object list;
- {
- register Lisp_Object tail;
- for (tail = list; CONSP (tail); tail = Fcdr (tail))
- {
- register Lisp_Object elt, tem;
- elt = Fcar (tail);
- if (!CONSP (elt)) continue;
- tem = Fcar (elt);
- if (EQ (key, tem)) return elt;
- }
- return Qnil;
- }
-
- DEFUN ("assoc", Fassoc, Sassoc, 2, 2, 0,
- "Return non-nil if ELT is `equal' to the car of an element of LIST.\n\
- The value is actually the element of LIST whose car is ELT.")
- (key, list)
- register Lisp_Object key;
- Lisp_Object list;
- {
- register Lisp_Object tail;
- for (tail = list; !NILP (tail); tail = Fcdr (tail))
- {
- register Lisp_Object elt, tem;
- elt = Fcar (tail);
- if (!CONSP (elt)) continue;
- tem = Fequal (Fcar (elt), key);
- if (!NILP (tem)) return elt;
- QUIT;
- }
- return Qnil;
- }
-
- Lisp_Object
- assoc_no_quit (key, list)
- register Lisp_Object key;
- Lisp_Object list;
- {
- Lisp_Object result;
- Lisp_Object oinhibit = Vinhibit_quit;
- Vinhibit_quit = Qt;
- result = Fassoc (key, list);
- Vinhibit_quit = oinhibit;
- return result;
- }
-
- DEFUN ("rassq", Frassq, Srassq, 2, 2, 0,
- "Return non-nil if ELT is `eq' to the cdr of an element of LIST.\n\
- The value is actually the element of LIST whose cdr is ELT.")
- (key, list)
- register Lisp_Object key;
- Lisp_Object list;
- {
- register Lisp_Object tail;
- for (tail = list; !NILP (tail); tail = Fcdr (tail))
- {
- register Lisp_Object elt, tem;
- elt = Fcar (tail);
- if (!CONSP (elt)) continue;
- tem = Fcdr (elt);
- if (EQ (key, tem)) return elt;
- QUIT;
- }
- return Qnil;
- }
-
- Lisp_Object
- rassq_no_quit (key, list)
- register Lisp_Object key;
- Lisp_Object list;
- {
- register Lisp_Object tail;
- for (tail = list; CONSP (tail); tail = XCONS (tail)->cdr)
- {
- register Lisp_Object elt, tem;
- elt = XCONS (tail)->car;
- if (!CONSP (elt)) continue;
- tem = XCONS (elt)->cdr;
- if (EQ (key, tem)) return elt;
- }
- return Qnil;
- }
-
-
- DEFUN ("delq", Fdelq, Sdelq, 2, 2, 0,
- "Delete by side effect any occurrences of ELT as a member of LIST.\n\
- The modified LIST is returned. Comparison is done with `eq'.\n\
- If the first member of LIST is ELT, there is no way to remove it by side effect;\n\
- therefore, write `(setq foo (delq element foo))'\n\
- to be sure of changing the value of `foo'.")
- (elt, list)
- register Lisp_Object elt;
- Lisp_Object list;
- {
- register Lisp_Object tail, prev;
- register Lisp_Object tem;
-
- tail = list;
- prev = Qnil;
- while (!NILP (tail))
- {
- tem = Fcar (tail);
- if (EQ (elt, tem))
- {
- if (NILP (prev))
- list = Fcdr (tail);
- else
- Fsetcdr (prev, Fcdr (tail));
- }
- else
- prev = tail;
- tail = Fcdr (tail);
- QUIT;
- }
- return list;
- }
-
-
- Lisp_Object
- delq_no_quit (elt, list) /* no quit, no errors; be careful */
- register Lisp_Object elt, list;
- {
- register Lisp_Object tail, prev;
- register Lisp_Object tem;
-
- tail = list;
- prev = Qnil;
- while (CONSP (tail))
- {
- tem = XCONS (tail)->car;
- if (EQ (elt, tem))
- {
- if (NILP (prev))
- list = XCONS (tail)->cdr;
- else
- XCONS (prev)->cdr = XCONS (tail)->cdr;
- }
- else
- prev = tail;
- tail = XCONS (tail)->cdr;
- }
- return list;
- }
-
- DEFUN ("delete", Fdelete, Sdelete, 2, 2, 0,
- "Delete by side effect any occurrences of ELT as a member of LIST.\n\
- The modified LIST is returned. Comparison is done with `equal'.\n\
- If the first member of LIST is ELT, there is no way to remove it by side effect;\n\
- therefore, write `(setq foo (delete element foo))'\n\
- to be sure of changing the value of `foo'.")
- (elt, list)
- register Lisp_Object elt;
- Lisp_Object list;
- {
- register Lisp_Object tail, prev;
- register Lisp_Object tem;
-
- tail = list;
- prev = Qnil;
- while (!NILP (tail))
- {
- tem = Fcar (tail);
- tem = Fequal (elt, tem);
- if (!NILP (tem))
- {
- if (NILP (prev))
- list = Fcdr (tail);
- else
- Fsetcdr (prev, Fcdr (tail));
- }
- else
- prev = tail;
- tail = Fcdr (tail);
- QUIT;
- }
- return list;
- }
-
-
- DEFUN ("nreverse", Fnreverse, Snreverse, 1, 1, 0,
- "Reverse LIST by modifying cdr pointers.\n\
- Returns the beginning of the reversed list.")
- (list)
- Lisp_Object list;
- {
- register Lisp_Object prev, tail, next;
-
- if (NILP (list)) return list;
- prev = Qnil;
- tail = list;
- while (!NILP (tail))
- {
- QUIT;
- next = Fcdr (tail);
- Fsetcdr (tail, prev);
- prev = tail;
- tail = next;
- }
- return prev;
- }
-
- DEFUN ("reverse", Freverse, Sreverse, 1, 1, 0,
- "Reverse LIST, copying. Returns the beginning of the reversed list.\n\
- See also the function `nreverse', which is used more often.")
- (list)
- Lisp_Object list;
- {
- Lisp_Object length;
- register Lisp_Object *vec;
- register Lisp_Object tail;
- register int i;
-
- length = Flength (list);
- vec = (Lisp_Object *) alloca (XINT (length) * sizeof (Lisp_Object));
- for (i = XINT (length) - 1, tail = list; i >= 0; i--, tail = Fcdr (tail))
- vec[i] = Fcar (tail);
-
- return Flist (XINT (length), vec);
- }
-
- static Lisp_Object list_merge ();
-
- Lisp_Object list_sort (list, lisp_arg, pred_fn)
- Lisp_Object list, lisp_arg;
- int (*pred_fn)();
- {
- Lisp_Object front, back;
- Lisp_Object len, tem;
- struct gcpro gcpro1, gcpro2;
- int length;
-
- front = list;
- len = Flength (list);
- length = XINT (len);
- if (length < 2)
- return list;
-
- XSETINT (len, (length / 2) - 1);
- tem = Fnthcdr (len, list);
- back = Fcdr (tem);
- Fsetcdr (tem, Qnil);
-
- GCPRO2 (front, back);
- front = list_sort (front, lisp_arg, pred_fn);
- back = list_sort (back, lisp_arg, pred_fn);
- UNGCPRO;
- return list_merge (front, back, lisp_arg, pred_fn);
- }
-
- extern Lisp_Object Qgc_currently_forbidden;
-
- /* #### this is stupid and should be expunged */
- Lisp_Object
- safe_funcall_hook (Lisp_Object hook, int nargs, Lisp_Object arg1,
- Lisp_Object arg2, Lisp_Object arg3)
- {
- Lisp_Object result = Qnil;
- int count = specpdl_depth;
- specbind (Qgc_currently_forbidden, 1);
-
- if (!NILP (hook))
- {
- switch (nargs)
- {
- case 0: result = call0 (hook); break;
- case 1: result = call1 (hook, arg1); break;
- case 2: result = call2 (hook, arg1, arg2); break;
- case 3: result = call3 (hook, arg1, arg2, arg3); break;
- }
- }
- return unbind_to (count, result);
- }
-
- void
- run_hooks_with_args (hook_var, args, nargs)
- Lisp_Object hook_var, *args;
- int nargs;
- {
- Lisp_Object rest;
- struct gcpro gcpro1;
- if (NILP (Fboundp (hook_var)))
- return;
- rest = Fsymbol_value (hook_var);
- if (NILP (rest))
- return;
- GCPRO1 (rest);
- if (SYMBOLP (rest) || EQ (Qlambda, Fcar (rest)))
- rest = list1 (rest);
- while (!NILP (rest))
- {
- switch (nargs)
- {
- case 0: call0 (Fcar (rest)); break;
- case 1: call1 (Fcar (rest), args[1]); break;
- case 2: call2 (Fcar (rest), args[1], args[2]); break;
- case 3: call3 (Fcar (rest), args[1], args[2], args[3]); break;
- case 4: call4 (Fcar (rest), args[1], args[2], args[3], args[4]); break;
- /* if we ever want more, we'll add the clauses... */
- default: error ("run_hooks_with_args called with too many args");
- }
- rest = Fcdr (rest);
- }
- UNGCPRO;
- }
-
-
- /* feel free to write the others as needed... */
- void
- run_hooks_1_arg (hook_var, arg)
- Lisp_Object hook_var, arg;
- {
- run_hooks_with_args (hook_var, &arg, 1);
- }
-
-
- static Lisp_Object
- merge_pred_function (obj1, obj2, pred)
- Lisp_Object obj1, obj2, pred;
- {
- Lisp_Object tmp = Qnil;
-
- /* prevents the GC from happening in call2 */
- int count = specpdl_depth;
- specbind (Qgc_currently_forbidden, 1);
- tmp = call2 (pred, obj1, obj2);
- unbind_to (count, Qnil);
-
- if (NILP (tmp))
- return -1;
- else
- return 1;
- }
-
- DEFUN ("sort", Fsort, Ssort, 2, 2, 0,
- "Sort LIST, stably, comparing elements using PREDICATE.\n\
- Returns the sorted list. LIST is modified by side effects.\n\
- PREDICATE is called with two elements of LIST, and should return T\n\
- if the first element is \"less\" than the second.")
- (list, pred)
- Lisp_Object list, pred;
- {
- return list_sort (list, pred, merge_pred_function);
- }
-
- Lisp_Object
- merge (org_l1, org_l2, pred)
- Lisp_Object org_l1, org_l2, pred;
- {
- return list_merge (org_l1, org_l2, pred, merge_pred_function);
- }
-
-
- static Lisp_Object
- list_merge (org_l1, org_l2, lisp_arg, pred_fn)
- Lisp_Object org_l1, org_l2, lisp_arg;
- int (*pred_fn)();
- {
- Lisp_Object value;
- register Lisp_Object tail;
- Lisp_Object tem;
- register Lisp_Object l1, l2;
- struct gcpro gcpro1, gcpro2, gcpro3, gcpro4;
-
- l1 = org_l1;
- l2 = org_l2;
- tail = Qnil;
- value = Qnil;
-
- /* It is sufficient to protect org_l1 and org_l2.
- When l1 and l2 are updated, we copy the new values
- back into the org_ vars. */
-
- GCPRO4 (org_l1, org_l2, lisp_arg, value);
-
- while (1)
- {
- if (NILP (l1))
- {
- UNGCPRO;
- if (NILP (tail))
- return l2;
- Fsetcdr (tail, l2);
- return value;
- }
- if (NILP (l2))
- {
- UNGCPRO;
- if (NILP (tail))
- return l1;
- Fsetcdr (tail, l1);
- return value;
- }
-
- if ((*pred_fn)(Fcar (l2), Fcar (l1), lisp_arg) < 0)
- {
- tem = l1;
- l1 = Fcdr (l1);
- org_l1 = l1;
- }
- else
- {
- tem = l2;
- l2 = Fcdr (l2);
- org_l2 = l2;
- }
- if (NILP (tail))
- value = tem;
- else
- Fsetcdr (tail, tem);
- tail = tem;
- }
- }
-
-
- DEFUN ("get", Fget, Sget, 2, 2, 0,
- "Return the value of SYMBOL's PROPNAME property.\n\
- This is the last VALUE stored with `(put SYMBOL PROPNAME VALUE)'.")
- (sym, prop)
- Lisp_Object sym;
- register Lisp_Object prop;
- {
- register Lisp_Object tail;
-
- for (tail = Fsymbol_plist (sym); !NILP (tail); tail = Fcdr (Fcdr (tail)))
- if (EQ (prop, Fcar (tail)))
- return Fcar (Fcdr (tail));
-
- return Qnil;
- }
-
- DEFUN ("put", Fput, Sput, 3, 3, 0,
- "Store SYMBOL's PROPNAME property with value VALUE.\n\
- It can be retrieved with `(get SYMBOL PROPNAME)'.")
- (sym, prop, val)
- Lisp_Object sym;
- register Lisp_Object prop;
- Lisp_Object val;
- {
- register Lisp_Object tail;
- Lisp_Object head = Fsymbol_plist (sym);
-
- for (tail = head; !NILP (tail); tail = Fcdr (Fcdr (tail)))
- if (EQ (prop, Fcar (tail)))
- return Fsetcar (Fcdr (tail), val);
-
- Fsetplist (sym, Fcons (prop, Fcons (val, head)));
- return val;
- }
-
- DEFUN ("remprop", Fremprop, Sremprop, 2, 2, 0,
- "Remove from SYMBOL's plist the property PROP and its value.")
- (symbol, property)
- Lisp_Object symbol, property;
- {
- register Lisp_Object tail;
- register Lisp_Object obj;
- register Lisp_Object prev;
- register unsigned char changed = 0;
-
- CHECK_SYMBOL (symbol, 0);
- tail = XSYMBOL (symbol)->plist;
-
- obj = Fcar (tail);
- while (!NILP (obj) && EQ (property, obj))
- {
- changed = 1;
- tail = Fcdr (Fcdr (tail));
- obj = Fcar (tail);
- }
- XSYMBOL (symbol)->plist = tail;
-
- prev = tail;
- tail = Fcdr (Fcdr (tail));
- while (!NILP (tail))
- {
- obj = Fcar (tail);
- if (EQ (property, obj))
- {
- changed = 1;
- Fsetcdr (Fcdr (prev), (Fcdr (Fcdr (tail))));
- }
- prev = tail;
- tail = Fcdr (Fcdr (tail));
- }
-
- return changed ? Qt : Qnil;
- }
-
-
- /* Same as the Common Lisp function GETF. Never errors,
- returns nil when there is no match. */
- Lisp_Object
- getf (plist, indicator)
- Lisp_Object plist, indicator;
- {
- Lisp_Object tail = plist;
-
- while (CONSP (tail))
- {
- struct Lisp_Cons *untagged_tail = XCONS (tail);
-
- tail = untagged_tail->cdr;
- if (EQ (untagged_tail->car, indicator))
- {
- if (CONSP (tail))
- return XCONS (tail)->car;
- else
- return Qnil;
- }
- if (CONSP (tail))
- tail = XCONS (tail)->cdr;
- else
- return Qnil;
- }
- return Qnil;
- }
-
- extern Lisp_Object event_equal (Lisp_Object, Lisp_Object);
-
- DEFUN ("equal", Fequal, Sequal, 2, 2, 0,
- "T if two Lisp objects have similar structure and contents.\n\
- They must have the same data type.\n\
- Conses are compared by comparing the cars and the cdrs.\n\
- Vectors and strings are compared element by element.\n\
- Numbers are compared by value. Symbols must match exactly.")
- (o1, o2)
- register Lisp_Object o1, o2;
- {
- do_cdr:
- QUIT;
- if (XTYPE (o1) != XTYPE (o2)) return Qnil;
- if (XINT (o1) == XINT (o2)) return Qt;
- if (CONSP (o1))
- {
- Lisp_Object v1;
- v1 = Fequal (Fcar (o1), Fcar (o2));
- if (NILP (v1))
- return v1;
- o1 = Fcdr (o1), o2 = Fcdr (o2);
- goto do_cdr;
- }
- if (MARKERP (o1))
- {
- return (XMARKER (o1)->buffer == XMARKER (o2)->buffer
- && XMARKER (o1)->bufpos == XMARKER (o2)->bufpos)
- ? Qt : Qnil;
- }
- if (VECTORP (o1))
- {
- register int index;
- if (XVECTOR (o1)->size != XVECTOR (o2)->size)
- return Qnil;
- for (index = 0; index < XVECTOR (o1)->size; index++)
- {
- Lisp_Object v, v1, v2;
- v1 = XVECTOR (o1)->contents [index];
- v2 = XVECTOR (o2)->contents [index];
- v = Fequal (v1, v2);
- if (NILP (v)) return v;
- }
- return Qt;
- }
- if (STRINGP (o1))
- {
- if (XSTRING (o1)->size != XSTRING (o2)->size)
- return Qnil;
- if (memcmp (XSTRING (o1)->data, XSTRING (o2)->data, XSTRING (o1)->size))
- return Qnil;
- return Qt;
- }
- if (EVENTP (o1))
- return event_equal (o1, o2);
- #ifdef LISP_FLOAT_TYPE
- if (FLOATP (o1))
- return (XFLOAT (o1)->data == XFLOAT (o2)->data) ? Qt : Qnil;
- #endif
-
- return Qnil;
- }
-
- DEFUN ("fillarray", Ffillarray, Sfillarray, 2, 2, 0,
- "Store each element of ARRAY with ITEM. ARRAY is a vector or string.")
- (array, item)
- Lisp_Object array, item;
- {
- register int size, index, charval;
- retry:
- if (VECTORP (array))
- {
- register Lisp_Object *p = XVECTOR (array)->contents;
- size = XVECTOR (array)->size;
- for (index = 0; index < size; index++)
- p[index] = item;
- }
- else if (STRINGP (array))
- {
- register unsigned char *p = XSTRING (array)->data;
- CHECK_FIXNUM (item, 1);
- charval = XINT (item);
- size = XSTRING (array)->size;
- for (index = 0; index < size; index++)
- p[index] = charval;
- }
- else
- {
- array = wrong_type_argument (Qarrayp, array);
- goto retry;
- }
- return array;
- }
-
- /* ARGSUSED */
- Lisp_Object
- nconc2 (s1, s2)
- Lisp_Object s1, s2;
- {
- #ifdef NO_ARG_ARRAY
- Lisp_Object args[2];
- args[0] = s1;
- args[1] = s2;
- return Fnconc (2, args);
- #else
- return Fnconc (2, &s1);
- #endif /* NO_ARG_ARRAY */
- }
-
- DEFUN ("nconc", Fnconc, Snconc, 0, MANY, 0,
- "Concatenate any number of lists by altering them.\n\
- Only the last argument is not altered, and need not be a list.")
- (nargs, args)
- int nargs;
- Lisp_Object *args;
- {
- register int argnum;
- register Lisp_Object tail, tem, val;
-
- val = Qnil;
-
- for (argnum = 0; argnum < nargs; argnum++)
- {
- tem = args[argnum];
- if (NILP (tem)) continue;
-
- if (NILP (val))
- val = tem;
-
- if (argnum + 1 == nargs) break;
-
- if (!CONSP (tem))
- tem = wrong_type_argument (Qlistp, tem);
-
- while (CONSP (tem))
- {
- tail = tem;
- tem = Fcdr (tail);
- QUIT;
- }
-
- tem = args[argnum + 1];
- Fsetcdr (tail, tem);
- if (NILP (tem))
- args[argnum + 1] = tail;
- }
-
- return val;
- }
-
- /* This is the guts of all mapping functions.
- Apply fn to each element of seq, one by one,
- storing the results into elements of vals, a C vector of Lisp_Objects.
- leni is the length of vals, which should also be the length of seq. */
-
- static void
- mapcar1 (leni, vals, fn, seq)
- int leni;
- Lisp_Object *vals;
- Lisp_Object fn, seq;
- {
- register Lisp_Object tail;
- Lisp_Object dummy;
- register int i;
- struct gcpro gcpro1, gcpro2, gcpro3;
-
- /* Don't let vals contain any garbage when GC happens. */
- for (i = 0; i < leni; i++)
- vals[i] = Qnil;
-
- GCPRO3 (dummy, fn, seq);
- gcpro1.var = vals;
- gcpro1.nvars = leni;
- /* We need not explicitly protect `tail' because it is used only on lists, and
- 1) lists are not relocated and 2) the list is marked via `seq' so will not be freed */
-
- if (VECTORP (seq))
- {
- for (i = 0; i < leni; i++)
- {
- dummy = XVECTOR (seq)->contents[i];
- vals[i] = call1 (fn, dummy);
- }
- }
- else if (STRINGP (seq))
- {
- for (i = 0; i < leni; i++)
- {
- XFASTINT (dummy) = XSTRING (seq)->data[i];
- vals[i] = call1 (fn, dummy);
- }
- }
- else /* Must be a list, since Flength did not get an error */
- {
- tail = seq;
- for (i = 0; i < leni; i++)
- {
- vals[i] = call1 (fn, Fcar (tail));
- tail = Fcdr (tail);
- }
- }
-
- UNGCPRO;
- }
-
- DEFUN ("mapconcat", Fmapconcat, Smapconcat, 3, 3, 0,
- "Apply FN to each element of SEQ, and concat the results as strings.\n\
- In between each pair of results, stick in SEP.\n\
- Thus, \" \" as SEP results in spaces between the values return by FN.")
- (fn, seq, sep)
- Lisp_Object fn, seq, sep;
- {
- Lisp_Object len;
- register int leni;
- int nargs;
- register Lisp_Object *args;
- register int i;
- struct gcpro gcpro1;
-
- len = Flength (seq);
- leni = XINT (len);
- nargs = leni + leni - 1;
- if (nargs < 0) return build_string ("");
-
- args = (Lisp_Object *) alloca (nargs * sizeof (Lisp_Object));
-
- GCPRO1 (sep);
- mapcar1 (leni, args, fn, seq);
- UNGCPRO;
-
- for (i = leni - 1; i >= 0; i--)
- args[i + i] = args[i];
-
- for (i = 1; i < nargs; i += 2)
- args[i] = sep;
-
- return Fconcat (nargs, args);
- }
-
- DEFUN ("mapcar", Fmapcar, Smapcar, 2, 2, 0,
- "Apply FUNCTION to each element of SEQUENCE, and make a list of the results.\n\
- The result is a list just as long as SEQUENCE.\n\
- SEQUENCE may be a list, a vector or a string.")
- (fn, seq)
- Lisp_Object fn, seq;
- {
- register Lisp_Object len;
- register int leni;
- register Lisp_Object *args;
-
- len = Flength (seq);
- leni = XFASTINT (len);
- args = (Lisp_Object *) alloca (leni * sizeof (Lisp_Object));
-
- mapcar1 (leni, args, fn, seq);
-
- return Flist (leni, args);
- }
-
- /* Avoid static vars inside a function since in HPUX they dump as pure. */
- static int ldav_initialized;
- static int ldav_channel;
- #ifdef LOAD_AVE_TYPE
- #ifndef VMS
- static struct nlist ldav_nl[2];
- #endif /* VMS */
- #endif /* LOAD_AVE_TYPE */
-
- #define channel ldav_channel
- #define initialized ldav_initialized
- #define nl ldav_nl
-
- DEFUN ("load-average", Fload_average, Sload_average, 0, 0, 0,
- "Return list of 1 minute, 5 minute and 15 minute load averages.\n\
- Each of the three load averages is multiplied by 100,\n\
- then converted to integer.\n\
- \n\
- This won't work unless the emacs executable is setgid kmem\n(\
- assuming that /dev/kmem is in the group kmem.)")
- ()
- {
- #ifndef LOAD_AVE_TYPE
- error ("load-average not implemented for this operating system");
-
- #else /* LOAD_AVE_TYPE defined */
-
- LOAD_AVE_TYPE load_ave[3];
- #ifdef HAVE_HPUX_PSTAT
- struct pst_dynamic pst_dyn;
- #endif /* HAVE HPUX_PSTAT */
- #ifdef VMS
- #ifndef eunice
- #include <iodef.h>
- #include <descrip.h>
- #else
- #include <vms/iodef.h>
- struct {int dsc$w_length; char *dsc$a_pointer;} descriptor;
- #endif /* eunice */
- #endif /* VMS */
-
- /* If this fails for any reason, we can return (0 0 0) */
- load_ave[0] = 0.0; load_ave[1] = 0.0; load_ave[2] = 0.0;
-
- #ifdef VMS
- /*
- * VMS specific code -- read from the Load Ave driver
- */
-
- /*
- * Ensure that there is a channel open to the load ave device
- */
- if (initialized == 0)
- {
- /* Attempt to open the channel */
- #ifdef eunice
- descriptor.size = 18;
- descriptor.ptr = "$$VMS_LOAD_AVERAGE";
- #else
- $DESCRIPTOR(descriptor, "LAV0:");
- #endif
- if (sys$assign (&descriptor, &channel, 0, 0) & 1)
- initialized = 1;
- }
- /*
- * Read the load average vector
- */
- if (initialized)
- {
- if (!(sys$qiow (0, channel, IO$_READVBLK, 0, 0, 0,
- load_ave, 12, 0, 0, 0, 0)
- & 1))
- {
- sys$dassgn (channel);
- initialized = 0;
- }
- }
- #else /* not VMS */
-
- #ifdef HAVE_HPUX_PSTAT
- pstat(PSTAT_DYNAMIC,(union pstun)&pst_dyn,sizeof(pst_dyn),0,0);
- load_ave[0] = pst_dyn.psd_avg_1_min;
- load_ave[1] = pst_dyn.psd_avg_5_min;
- load_ave[2] = pst_dyn.psd_avg_15_min;
- #else /* HAVE_HPUX_PSTAT */
- /*
- * 4.2BSD UNIX-specific code -- read _avenrun from /dev/kmem
- */
-
- /*
- * Make sure we have the address of _avenrun
- */
- if (nl[0].n_value == 0)
- {
- /*
- * Get the address of _avenrun
- */
- #ifndef NLIST_STRUCT
- strcpy (nl[0].n_name, LDAV_SYMBOL);
- nl[1].n_zeroes = 0;
- #else /* NLIST_STRUCT */
- #ifdef convex
- nl[0].n_un.n_name = LDAV_SYMBOL;
- nl[1].n_un.n_name = 0;
- #else /* not convex */
- #ifdef NEXT_KERNEL_FILE
- nl[0].n_un.n_name = LDAV_SYMBOL;
- nl[1].n_un.n_name = 0;
- #else
- nl[0].n_name = LDAV_SYMBOL;
- nl[1].n_name = 0;
- #endif /* not NEXT_KERNEL_FILE */
- #endif /* not convex */
- #endif /* NLIST_STRUCT */
-
- #ifdef NEXT_KERNEL_FILE
- nlist (NEXT_KERNEL_FILE, nl);
- #else
- nlist (KERNEL_FILE, nl);
- #endif /* NEXT_KERNEL_FILE */
-
- #ifdef FIXUP_KERNEL_SYMBOL_ADDR
- FIXUP_KERNEL_SYMBOL_ADDR (nl);
- #endif /* FIXUP_KERNEL_SYMBOL_ADDR */
- }
- /*
- * Make sure we have /dev/kmem open
- */
- if (initialized == 0)
- {
- /*
- * Open /dev/kmem
- */
- channel = open ("/dev/kmem", 0);
- if (channel >= 0) initialized = 1;
- }
- /*
- * If we can, get the load ave values
- */
- if ((nl[0].n_value != 0) && (initialized != 0))
- {
- /*
- * Seek to the correct address
- */
- lseek (channel, (long) nl[0].n_value, 0);
- if (read (channel, (char *) load_ave, sizeof load_ave)
- != sizeof(load_ave))
- {
- close (channel);
- initialized = 0;
- }
- }
- #endif /* not HAVE_HPUX_PSTAT */
- #endif /* not VMS */
-
- /*
- * Return the list of load average values
- */
- return Fcons (make_number (LOAD_AVE_CVT (load_ave[0])),
- Fcons (make_number (LOAD_AVE_CVT (load_ave[1])),
- Fcons (make_number (LOAD_AVE_CVT (load_ave[2])),
- Qnil)));
- #endif /* LOAD_AVE_TYPE */
- }
-
- #undef channel
- #undef initialized
- #undef nl
-
- Lisp_Object Vfeatures;
-
- DEFUN ("featurep", Ffeaturep, Sfeaturep, 1, 1, 0,
- "Returns t if FEATURE is present in this Emacs.\n\
- Use this to conditionalize execution of lisp code based on the presence or\n\
- absence of emacs or environment extensions.\n\
- Use `provide' to declare that a feature is available.\n\
- This function looks at the value of the variable `features'.")
- (feature)
- Lisp_Object feature;
- {
- register Lisp_Object tem;
- CHECK_SYMBOL (feature, 0);
- tem = Fmemq (feature, Vfeatures);
- return (NILP (tem)) ? Qnil : Qt;
- }
-
- DEFUN ("provide", Fprovide, Sprovide, 1, 1, 0,
- "Announce that FEATURE is a feature of the current Emacs.")
- (feature)
- Lisp_Object feature;
- {
- register Lisp_Object tem;
- CHECK_SYMBOL (feature, 0);
- if (!NILP (Vautoload_queue))
- Vautoload_queue = Fcons (Fcons (Vfeatures, Qnil), Vautoload_queue);
- tem = Fmemq (feature, Vfeatures);
- if (NILP (tem))
- Vfeatures = Fcons (feature, Vfeatures);
- return feature;
- }
-
- DEFUN ("require", Frequire, Srequire, 1, 2, 0,
- "If feature FEATURE is not loaded, load it from FILENAME.\n\
- If FEATURE is not a member of the list `features', then the feature\n\
- is not loaded; so load the file FILENAME.\n\
- If FILENAME is omitted, the printname of FEATURE is used as the file name.")
- (feature, file_name)
- Lisp_Object feature, file_name;
- {
- register Lisp_Object tem;
- CHECK_SYMBOL (feature, 0);
- tem = Fmemq (feature, Vfeatures);
- if (NILP (tem))
- {
- Fload (NILP (file_name) ? Fsymbol_name (feature) : file_name,
- Qnil, Qt, Qnil);
- tem = Fmemq (feature, Vfeatures);
- if (NILP (tem))
- error ("Required feature %s was not provided",
- XSYMBOL (feature)->name->data );
- }
- return feature;
- }
-
- /* Sound stuff, by jwz. */
-
- #ifdef USE_SOUND
- extern void play_sound_file (char *name, int volume);
- extern void play_sound_data (unsigned char *data, int length, int volume);
-
- extern int interrupt_input;
- extern void request_sigio (void);
- extern void unrequest_sigio (void);
- #endif /* USE_SOUND */
-
- DEFUN ("play-sound-file", Fplay_sound_file, Splay_sound_file,
- 1, 2, "fSound file name: ",
- "Play the named sound file on the console speaker at the specified volume\n(\
- 0-100, default specified by the `bell-volume' variable).\n\
- The sound file must be in the Sun/NeXT U-LAW format."
- )
- (file, vol)
- Lisp_Object file, vol;
- {
- #ifdef USE_SOUND
-
- CHECK_STRING (file, 0);
- if (NILP (vol)) vol = Vbell_volume;
- CHECK_FIXNUM (vol, 0);
-
- file = Fexpand_file_name (file, Qnil);
- if (Qnil == Ffile_readable_p (file))
- if (Qnil == Ffile_exists_p (file))
- error ("file does not exist.");
- else
- error ("file is unreadable.");
-
- /* The sound code doesn't like getting SIGIO interrupts. Unix sucks! */
- if (interrupt_input) unrequest_sigio ();
- play_sound_file ((char *) XSTRING(file)->data, XINT(vol));
- if (interrupt_input) request_sigio ();
- QUIT;
-
- #endif /* USE_SOUND */
-
- return Qnil;
- }
-
- Lisp_Object Vsound_alist;
-
- #ifdef USE_SOUND
- int not_on_console; /*set at startup to determine whether we can play sounds*/
- #endif
-
- void (*beep_hook) ();
-
- DEFUN ("play-sound", Fplay_sound, Splay_sound, 1, 2, 0,
- "Play a sound of the provided type.\n\
- See the variable sound-alist.")
- (sound, volume)
- Lisp_Object sound;
- Lisp_Object volume;
- {
- int looking_for_default = 0;
-
- TRY_AGAIN:
- while (!NILP (sound) && SYMBOLP (sound) && !EQ (sound, Qt))
- {
- sound = Fcdr (Fassq (sound, Vsound_alist));
- /* allow (name foo) as well as (name . foo) */
- if (!CONSP (sound))
- ;
- else if (NILP (Fcdr (sound)))
- {
- sound = Fcar (sound);
- }
- else if (FIXNUMP (Fcar (Fcdr (sound))) &&
- NILP (Fcdr (Fcdr (sound))))
- {
- if (NILP (volume)) volume = Fcar (Fcdr (sound));
- sound = Fcar (sound);
- }
- else if (FIXNUMP (Fcar (sound)) &&
- NILP (Fcdr (Fcdr (sound))))
- {
- if (NILP (volume)) volume = Fcar (sound);
- sound = Fcar (Fcdr (sound));
- }
- }
-
- if (NILP (sound) && !looking_for_default)
- {
- looking_for_default = 1;
- sound = intern ("default");
- goto TRY_AGAIN;
- }
-
- if (!FIXNUMP (volume))
- volume = Vbell_volume;
-
- #ifdef USE_SOUND
- if (not_on_console) sound = Qt;
-
- if (!STRINGP (sound))
- {
- if (beep_hook) (*beep_hook) (XINT (volume));
- }
- else
- {
- /* The sound code doesn't like getting SIGIO interrupts. Unix sucks! */
- if (interrupt_input) unrequest_sigio ();
- play_sound_data (XSTRING (sound)->data, XSTRING (sound)->size,
- XINT (volume));
- if (interrupt_input) request_sigio ();
- QUIT;
- }
- #else /* ! USE_SOUND */
- if (beep_hook) (*beep_hook) (XINT (volume));
- #endif /* ! USE_SOUND */
-
- return Qnil;
- }
-
-
- void
- syms_of_fns ()
- {
- defsymbol (&Qstring_lessp, "string-lessp");
- defsymbol (&Qyes_or_no_p, "yes-or-no-p");
-
- DEFVAR_LISP ("features", &Vfeatures,
- "A list of symbols which are the features of the executing emacs.\n\
- Used by `featurep' and `require', and altered by `provide'.");
- Vfeatures = Qnil;
-
- defsubr (&Sidentity);
- defsubr (&Srandom);
- defsubr (&Slength);
- defsubr (&Sstring_equal);
- defsubr (&Sstring_lessp);
- defsubr (&Sappend);
- defsubr (&Sconcat);
- defsubr (&Svconcat);
- defsubr (&Scopy_sequence);
- defsubr (&Scopy_alist);
- defsubr (&Scopy_tree);
- defsubr (&Ssubstring);
- defsubr (&Snthcdr);
- defsubr (&Snth);
- defsubr (&Selt);
- defsubr (&Smember);
- defsubr (&Smemq);
- defsubr (&Sassq);
- defsubr (&Sassoc);
- defsubr (&Srassq);
- defsubr (&Sdelq);
- defsubr (&Sdelete);
- defsubr (&Snreverse);
- defsubr (&Sreverse);
- defsubr (&Ssort);
- defsubr (&Sget);
- defsubr (&Sput);
- defsubr (&Sremprop);
- defsubr (&Sequal);
- defsubr (&Sfillarray);
- defsubr (&Snconc);
- defsubr (&Smapcar);
- defsubr (&Smapconcat);
- defsubr (&Sload_average);
- defsubr (&Sfeaturep);
- defsubr (&Srequire);
- defsubr (&Sprovide);
-
- /* Lucid sound change */
- DEFVAR_LISP ("bell-volume", &Vbell_volume, "How loud to be, from 0 to 100.");
- Vbell_volume = make_number (50);
-
- DEFVAR_LISP ("sound-alist", &Vsound_alist,
- "An alist associating symbols with strings of audio-data.\n\
- When `beep' or `ding' is called with one of the symbols, the associated\n\
- sound data will be played instead of the standard beep. This only works\n\
- if you are logged in on the console of a Sun SparcStation or SGI machine.\n\
- \n\
- Elements of this list should be of one of the following forms:\n\
- \n\
- ( symbol . string-or-symbol )\n\
- ( symbol integer string-or-symbol )\n\
- \n\
- If the `string-or-symbol' is a string, then it should contain raw sound data,\n\
- the contents of a `.au' file. If it is a symbol, then that means that this\n\
- element is an alias for some other element, and the sound-player will look\n\
- for that next. If the integer is provided, it is the volume at which the\n\
- sound should be played, from 0 to 100. \n\
- \n\
- If an element of this alist begins with the symbol `default', then that sound\n\
- will be used when no other sound is appropriate.\n\
- \n\
- The symbol `t' in place of a sound-string means to use the default X beep.\n\
- In this way, you can define beep-types to have different volumes even when\n\
- not running on the console of a Sun4.\n\
- \n\
- You should probably add things to this list by calling the function\n\
- load-sound-file.\n\
- \n\
- The following beep-types are used by emacs itself:\n\
- \n\
- auto-save-error when an auto-save does not succeed\n\
- command-error when the emacs command loop catches an error\n\
- undefined-key when you type a key that is undefined\n\
- undefined-click when you use an undefined mouse-click combination\n\
- no-completion during completing-read\n\
- y-or-n-p when you type something other than 'y' or 'n'\n\
- yes-or-no-p when you type something other than 'yes' or 'no'\n\
- \n\
- Other lisp packages may use other beep types, but these are the ones that\n\
- the C kernel of emacs uses.");
- Vsound_alist = Qnil;
- defsubr (&Splay_sound_file);
- defsubr (&Splay_sound);
- #ifdef USE_SOUND
- not_on_console = 0; /* set by X startup code */
- #endif
- beep_hook = 0 ; /* set by X startup code */
- }
-