mirror of
https://git.savannah.gnu.org/git/guile.git
synced 2025-04-30 11:50:28 +02:00
70d6375376
net_db.c, read.c, socket.c: Update error messages to use ~A for %s, ~S for %S to work with new `simple-format' format and be standardized better. * print.h, print.c (scm_simple_format): Added `simple-format' primitive. It's the old scm_display_error, with ARGS now a rest parameter, and the destination first instead of last (and a couple new capabilities inspired by `format' -- #t as destination means current-output-port, #f means return the formatted text as a string. * gh.h, gh_data.c, ports.h, ports.c: Added some missing const specifications. * backtrace.c (scm_display_error_message): Rewrote to use scm_simple_format() procedure. * __scm.h: Added commented-out #define of GUILE_DEBUG_FREELIST
756 lines
17 KiB
C
756 lines
17 KiB
C
/* Copyright (C) 1995,1996,1997 Free Software Foundation, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307 USA
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*
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* As a special exception, the Free Software Foundation gives permission
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* for additional uses of the text contained in its release of GUILE.
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*
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* The exception is that, if you link the GUILE library with other files
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* to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public License.
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* Your use of that executable is in no way restricted on account of
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* linking the GUILE library code into it.
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*
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* This exception does not however invalidate any other reasons why
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* the executable file might be covered by the GNU General Public License.
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*
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* This exception applies only to the code released by the
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* Free Software Foundation under the name GUILE. If you copy
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* code from other Free Software Foundation releases into a copy of
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* GUILE, as the General Public License permits, the exception does
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* not apply to the code that you add in this way. To avoid misleading
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* anyone as to the status of such modified files, you must delete
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* this exception notice from them.
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*
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* If you write modifications of your own for GUILE, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice. */
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/* Software engineering face-lift by Greg J. Badros, 11-Dec-1999,
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gjb@cs.washington.edu, http://www.cs.washington.edu/homes/gjb */
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#include <stdio.h>
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#include "_scm.h"
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#include "eq.h"
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#include "scm_validate.h"
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#include "list.h"
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#ifdef __STDC__
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#include <stdarg.h>
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#define var_start(x, y) va_start(x, y)
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#else
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#include <varargs.h>
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#define var_start(x, y) va_start(x)
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#endif
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/* creating lists */
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/* SCM_P won't help us deal with varargs here. */
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SCM
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scm_listify (SCM elt, ...)
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{
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va_list foo;
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SCM answer;
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SCM *pos;
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var_start (foo, elt);
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answer = SCM_EOL;
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pos = &answer;
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while (elt != SCM_UNDEFINED)
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{
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*pos = scm_cons (elt, SCM_EOL);
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pos = SCM_CDRLOC (*pos);
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elt = va_arg (foo, SCM);
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}
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return answer;
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}
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SCM_DEFINE (scm_list, "list", 0, 0, 1,
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(SCM objs),
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"")
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#define FUNC_NAME s_scm_list
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{
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return objs;
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_list_star, "list*", 1, 0, 1,
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(SCM arg, SCM rest),
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"")
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#define FUNC_NAME s_scm_list_star
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{
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if (SCM_NNULLP (rest))
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{
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SCM prev = arg = scm_cons (arg, rest);
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while (SCM_NNULLP (SCM_CDR (rest)))
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{
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prev = rest;
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rest = SCM_CDR (rest);
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}
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SCM_SETCDR (prev, SCM_CAR (rest));
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}
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return arg;
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}
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#undef FUNC_NAME
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/* general questions about lists --- null?, list?, length, etc. */
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SCM_DEFINE (scm_null_p, "null?", 1, 0, 0,
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(SCM x),
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"")
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#define FUNC_NAME s_scm_null_p
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{
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return SCM_BOOL(SCM_NULLP(x));
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_list_p, "list?", 1, 0, 0,
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(SCM x),
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"")
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#define FUNC_NAME s_scm_list_p
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{
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return SCM_BOOL(scm_ilength(x)>=0);
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}
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#undef FUNC_NAME
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/* Return the length of SX, or -1 if it's not a proper list.
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This uses the "tortoise and hare" algorithm to detect "infinitely
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long" lists (i.e. lists with cycles in their cdrs), and returns -1
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if it does find one. */
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long
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scm_ilength(SCM sx)
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{
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long i = 0;
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SCM tortoise = sx;
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SCM hare = sx;
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do {
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if (SCM_NULLP(hare)) return i;
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if (SCM_NCONSP(hare)) return -1;
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hare = SCM_CDR(hare);
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i++;
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if (SCM_NULLP(hare)) return i;
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if (SCM_NCONSP(hare)) return -1;
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hare = SCM_CDR(hare);
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i++;
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/* For every two steps the hare takes, the tortoise takes one. */
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tortoise = SCM_CDR(tortoise);
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}
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while (hare != tortoise);
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/* If the tortoise ever catches the hare, then the list must contain
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a cycle. */
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return -1;
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}
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SCM_DEFINE (scm_length, "length", 1, 0, 0,
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(SCM lst),
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"")
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#define FUNC_NAME s_scm_length
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{
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int i;
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SCM_VALIDATE_LIST_COPYLEN (1,lst,i);
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return SCM_MAKINUM (i);
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}
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#undef FUNC_NAME
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/* appending lists */
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SCM_DEFINE (scm_append, "append", 0, 0, 1,
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(SCM args),
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"A destructive version of @code{append} (@pxref{Pairs and Lists,,,r4rs,
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The Revised^4 Report on Scheme}). The cdr field of each list's final
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pair is changed to point to the head of the next list, so no consing is
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performed. Return a pointer to the mutated list.")
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#define FUNC_NAME s_scm_append
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{
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SCM res = SCM_EOL;
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SCM *lloc = &res, arg;
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if (SCM_IMP(args)) {
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SCM_VALIDATE_NULL (SCM_ARGn, args);
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return res;
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}
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SCM_VALIDATE_CONS (SCM_ARGn, args);
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while (1) {
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arg = SCM_CAR(args);
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args = SCM_CDR(args);
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if (SCM_IMP(args)) {
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*lloc = arg;
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SCM_VALIDATE_NULL (SCM_ARGn, args);
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return res;
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}
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SCM_VALIDATE_CONS (SCM_ARGn, args);
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for (; SCM_CONSP(arg); arg = SCM_CDR(arg)) {
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*lloc = scm_cons(SCM_CAR(arg), SCM_EOL);
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lloc = SCM_CDRLOC(*lloc);
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}
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SCM_VALIDATE_NULL (SCM_ARGn, arg);
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}
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_append_x, "append!", 0, 0, 1,
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(SCM args),
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"")
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#define FUNC_NAME s_scm_append_x
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{
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SCM arg;
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tail:
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if (SCM_NULLP(args)) return SCM_EOL;
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arg = SCM_CAR(args);
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args = SCM_CDR(args);
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if (SCM_NULLP(args)) return arg;
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if (SCM_NULLP(arg)) goto tail;
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SCM_VALIDATE_CONS (SCM_ARG1,arg);
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SCM_SETCDR (scm_last_pair (arg), scm_append_x (args));
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return arg;
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_last_pair, "last-pair", 1, 0, 0,
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(SCM lst),
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"Return a pointer to the last pair in @var{lst}, signalling an error if
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@var{lst} is circular.")
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#define FUNC_NAME s_scm_last_pair
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{
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SCM tortoise = lst;
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SCM hare = lst;
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if (SCM_NULLP (lst))
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return SCM_EOL;
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SCM_VALIDATE_CONS (SCM_ARG1, lst);
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do {
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SCM ahead = SCM_CDR(hare);
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if (SCM_NCONSP(ahead)) return hare;
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hare = ahead;
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ahead = SCM_CDR(hare);
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if (SCM_NCONSP(ahead)) return hare;
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hare = ahead;
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tortoise = SCM_CDR(tortoise);
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}
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while (hare != tortoise);
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scm_misc_error (FUNC_NAME, "Circular structure in position 1: ~S", SCM_LIST1 (lst));
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}
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#undef FUNC_NAME
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/* reversing lists */
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SCM_DEFINE (scm_reverse, "reverse", 1, 0, 0,
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(SCM lst),
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"")
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#define FUNC_NAME s_scm_reverse
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{
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SCM result = SCM_EOL;
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SCM tortoise = lst;
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SCM hare = lst;
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do {
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if (SCM_NULLP(hare)) return result;
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SCM_ASSERT(SCM_CONSP(hare), lst, 1, FUNC_NAME);
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result = scm_cons (SCM_CAR (hare), result);
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hare = SCM_CDR (hare);
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if (SCM_NULLP(hare)) return result;
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SCM_ASSERT(SCM_CONSP(hare), lst, 1, FUNC_NAME);
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result = scm_cons (SCM_CAR (hare), result);
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hare = SCM_CDR (hare);
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tortoise = SCM_CDR (tortoise);
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}
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while (hare != tortoise);
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scm_misc_error (FUNC_NAME, "Circular structure in position 1: ~S", SCM_LIST1 (lst));
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_reverse_x, "reverse!", 1, 1, 0,
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(SCM lst, SCM new_tail),
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"A destructive version of @code{reverse} (@pxref{Pairs and Lists,,,r4rs,
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The Revised^4 Report on Scheme}). The cdr of each cell in @var{lst} is
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modified to point to the previous list element. Return a pointer to the
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head of the reversed list.
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Caveat: because the list is modified in place, the tail of the original
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list now becomes its head, and the head of the original list now becomes
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the tail. Therefore, the @var{lst} symbol to which the head of the
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original list was bound now points to the tail. To ensure that the head
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of the modified list is not lost, it is wise to save the return value of
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@code{reverse!}")
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#define FUNC_NAME s_scm_reverse_x
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{
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SCM_ASSERT (scm_ilength (lst) >= 0, lst, SCM_ARG1, FUNC_NAME);
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if (SCM_UNBNDP (new_tail))
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new_tail = SCM_EOL;
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else
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SCM_ASSERT (scm_ilength (new_tail) >= 0, new_tail, SCM_ARG2, FUNC_NAME);
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while (SCM_NNULLP (lst))
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{
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SCM old_tail = SCM_CDR (lst);
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SCM_SETCDR (lst, new_tail);
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new_tail = lst;
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lst = old_tail;
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}
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return new_tail;
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}
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#undef FUNC_NAME
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/* indexing lists by element number */
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SCM_DEFINE (scm_list_ref, "list-ref", 2, 0, 0,
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(SCM lst, SCM k),
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"")
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#define FUNC_NAME s_scm_list_ref
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{
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register long i;
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SCM_VALIDATE_INUM_MIN_COPY (2,k,0,i);
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while (i-- > 0) {
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SCM_ASRTGO(SCM_CONSP(lst), erout);
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lst = SCM_CDR(lst);
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}
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erout:
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SCM_ASSERT(SCM_CONSP(lst),
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SCM_NULLP(lst)?k:lst, SCM_NULLP(lst)?SCM_OUTOFRANGE:SCM_ARG1, FUNC_NAME);
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return SCM_CAR(lst);
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_list_set_x, "list-set!", 3, 0, 0,
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(SCM lst, SCM k, SCM val),
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"Set the @var{k}th element of @var{lst} to @var{val}.")
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#define FUNC_NAME s_scm_list_set_x
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{
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register long i;
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SCM_VALIDATE_INUM_MIN_COPY (2,k,0,i);
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while (i-- > 0) {
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SCM_ASRTGO(SCM_CONSP(lst), erout);
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lst = SCM_CDR(lst);
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}
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erout:
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SCM_ASSERT(SCM_CONSP(lst),
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SCM_NULLP(lst)?k:lst, SCM_NULLP(lst)?SCM_OUTOFRANGE:SCM_ARG1, FUNC_NAME);
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SCM_SETCAR (lst, val);
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return val;
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}
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#undef FUNC_NAME
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SCM_REGISTER_PROC(s_list_cdr_ref, "list-cdr-ref", 2, 0, 0, scm_list_tail);
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SCM_DEFINE (scm_list_tail, "list-tail", 2, 0, 0,
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(SCM lst, SCM k),
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"Return the \"tail\" of @var{lst} beginning with its @var{k}th element.
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The first element of the list is considered to be element 0.
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@code{list-cdr-ref} and @code{list-tail} are identical. It may help to
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think of @code{list-cdr-ref} as accessing the @var{k}th cdr of the list,
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or returning the results of cdring @var{k} times down @var{lst}.")
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#define FUNC_NAME s_scm_list_tail
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{
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register long i;
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SCM_VALIDATE_INUM_MIN_COPY (2,k,0,i);
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while (i-- > 0) {
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SCM_VALIDATE_CONS (1,lst);
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lst = SCM_CDR(lst);
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}
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return lst;
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_list_cdr_set_x, "list-cdr-set!", 3, 0, 0,
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(SCM lst, SCM k, SCM val),
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"Set the @var{k}th cdr of @var{lst} to @var{val}.")
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#define FUNC_NAME s_scm_list_cdr_set_x
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{
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register long i;
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SCM_VALIDATE_INUM_MIN_COPY (2,k,0,i);
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while (i-- > 0) {
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SCM_ASRTGO(SCM_CONSP(lst), erout);
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lst = SCM_CDR(lst);
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}
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erout:
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SCM_ASSERT(SCM_CONSP(lst),
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SCM_NULLP(lst)?k:lst, SCM_NULLP(lst)?SCM_OUTOFRANGE:SCM_ARG1, FUNC_NAME);
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SCM_SETCDR (lst, val);
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return val;
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}
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#undef FUNC_NAME
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/* copying lists, perhaps partially */
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SCM_DEFINE (scm_list_head, "list-head", 2, 0, 0,
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(SCM lst, SCM k),
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"Copy the first @var{k} elements from @var{lst} into a new list, and
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return it.")
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#define FUNC_NAME s_scm_list_head
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{
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SCM answer;
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SCM * pos;
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register long i;
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SCM_VALIDATE_INUM_MIN_COPY (2,k,0,i);
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answer = SCM_EOL;
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pos = &answer;
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while (i-- > 0)
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{
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SCM_VALIDATE_CONS (1,lst);
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*pos = scm_cons (SCM_CAR (lst), SCM_EOL);
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pos = SCM_CDRLOC (*pos);
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lst = SCM_CDR(lst);
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}
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return answer;
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}
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#undef FUNC_NAME
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SCM_DEFINE (scm_list_copy, "list-copy", 1, 0, 0,
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(SCM lst),
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"Return a (newly-created) copy of @var{lst}.")
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#define FUNC_NAME s_scm_list_copy
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{
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SCM newlst;
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SCM * fill_here;
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SCM from_here;
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newlst = SCM_EOL;
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fill_here = &newlst;
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from_here = lst;
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while (SCM_CONSP (from_here))
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{
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SCM c;
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c = scm_cons (SCM_CAR (from_here), SCM_CDR (from_here));
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*fill_here = c;
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fill_here = SCM_CDRLOC (c);
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from_here = SCM_CDR (from_here);
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}
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return newlst;
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}
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#undef FUNC_NAME
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/* membership tests (memq, memv, etc.) */
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SCM_DEFINE (scm_sloppy_memq, "sloppy-memq", 2, 0, 0,
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(SCM x, SCM lst),
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"@deffnx primitive sloppy-memv
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@deffnx primitive sloppy-member
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These procedures behave like @code{memq}, @code{memv} and @code{member}
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(@pxref{Pairs and Lists,,,r4rs, The Revised^4 Report on Scheme}), but do
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not perform any type or error checking. Their use is recommended only
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in writing Guile internals, not for high-level Scheme programs.")
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#define FUNC_NAME s_scm_sloppy_memq
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{
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for(; SCM_CONSP (lst); lst = SCM_CDR(lst))
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{
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if (SCM_CAR(lst)==x)
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return lst;
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}
|
||
return lst;
|
||
}
|
||
#undef FUNC_NAME
|
||
|
||
|
||
SCM_DEFINE (scm_sloppy_memv, "sloppy-memv", 2, 0, 0,
|
||
(SCM x, SCM lst),
|
||
"")
|
||
#define FUNC_NAME s_scm_sloppy_memv
|
||
{
|
||
for(; SCM_CONSP (lst); lst = SCM_CDR(lst))
|
||
{
|
||
if (SCM_BOOL_F != scm_eqv_p (SCM_CAR(lst), x))
|
||
return lst;
|
||
}
|
||
return lst;
|
||
}
|
||
#undef FUNC_NAME
|
||
|
||
|
||
SCM_DEFINE (scm_sloppy_member, "sloppy-member", 2, 0, 0,
|
||
(SCM x, SCM lst),
|
||
"")
|
||
#define FUNC_NAME s_scm_sloppy_member
|
||
{
|
||
for(; SCM_CONSP (lst); lst = SCM_CDR(lst))
|
||
{
|
||
if (SCM_BOOL_F != scm_equal_p (SCM_CAR(lst), x))
|
||
return lst;
|
||
}
|
||
return lst;
|
||
}
|
||
#undef FUNC_NAME
|
||
|
||
|
||
|
||
SCM_DEFINE (scm_memq, "memq", 2, 0, 0,
|
||
(SCM x, SCM lst),
|
||
"")
|
||
#define FUNC_NAME s_scm_memq
|
||
{
|
||
SCM answer;
|
||
SCM_VALIDATE_LIST (2,lst);
|
||
answer = scm_sloppy_memq (x, lst);
|
||
return (answer == SCM_EOL) ? SCM_BOOL_F : answer;
|
||
}
|
||
#undef FUNC_NAME
|
||
|
||
|
||
|
||
SCM_DEFINE (scm_memv, "memv", 2, 0, 0,
|
||
(SCM x, SCM lst),
|
||
"")
|
||
#define FUNC_NAME s_scm_memv
|
||
{
|
||
SCM answer;
|
||
SCM_VALIDATE_LIST (2,lst);
|
||
answer = scm_sloppy_memv (x, lst);
|
||
return (answer == SCM_EOL) ? SCM_BOOL_F : answer;
|
||
}
|
||
#undef FUNC_NAME
|
||
|
||
|
||
SCM_DEFINE (scm_member, "member", 2, 0, 0,
|
||
(SCM x, SCM lst),
|
||
"")
|
||
#define FUNC_NAME s_scm_member
|
||
{
|
||
SCM answer;
|
||
SCM_VALIDATE_LIST (2,lst);
|
||
answer = scm_sloppy_member (x, lst);
|
||
return (answer == SCM_EOL) ? SCM_BOOL_F : answer;
|
||
}
|
||
#undef FUNC_NAME
|
||
|
||
|
||
|
||
/* deleting elements from a list (delq, etc.) */
|
||
|
||
SCM_DEFINE (scm_delq_x, "delq!", 2, 0, 0,
|
||
(SCM item, SCM lst),
|
||
"@deffnx primitive delv! item lst
|
||
@deffnx primitive delete! item lst
|
||
These procedures are destructive versions of @code{delq}, @code{delv}
|
||
and @code{delete}: they modify the pointers in the existing @var{lst}
|
||
rather than creating a new list. Caveat evaluator: Like other
|
||
destructive list functions, these functions cannot modify the binding of
|
||
@var{lst}, and so cannot be used to delete the first element of
|
||
@var{lst} destructively.")
|
||
#define FUNC_NAME s_scm_delq_x
|
||
{
|
||
SCM walk;
|
||
SCM *prev;
|
||
|
||
for (prev = &lst, walk = lst;
|
||
SCM_CONSP (walk);
|
||
walk = SCM_CDR (walk))
|
||
{
|
||
if (SCM_CAR (walk) == item)
|
||
*prev = SCM_CDR (walk);
|
||
else
|
||
prev = SCM_CDRLOC (walk);
|
||
}
|
||
|
||
return lst;
|
||
}
|
||
#undef FUNC_NAME
|
||
|
||
|
||
SCM_DEFINE (scm_delv_x, "delv!", 2, 0, 0,
|
||
(SCM item, SCM lst),
|
||
"")
|
||
#define FUNC_NAME s_scm_delv_x
|
||
{
|
||
SCM walk;
|
||
SCM *prev;
|
||
|
||
for (prev = &lst, walk = lst;
|
||
SCM_CONSP (walk);
|
||
walk = SCM_CDR (walk))
|
||
{
|
||
if (SCM_BOOL_F != scm_eqv_p (SCM_CAR (walk), item))
|
||
*prev = SCM_CDR (walk);
|
||
else
|
||
prev = SCM_CDRLOC (walk);
|
||
}
|
||
|
||
return lst;
|
||
}
|
||
#undef FUNC_NAME
|
||
|
||
|
||
|
||
SCM_DEFINE (scm_delete_x, "delete!", 2, 0, 0,
|
||
(SCM item, SCM lst),
|
||
"")
|
||
#define FUNC_NAME s_scm_delete_x
|
||
{
|
||
SCM walk;
|
||
SCM *prev;
|
||
|
||
for (prev = &lst, walk = lst;
|
||
SCM_CONSP (walk);
|
||
walk = SCM_CDR (walk))
|
||
{
|
||
if (SCM_BOOL_F != scm_equal_p (SCM_CAR (walk), item))
|
||
*prev = SCM_CDR (walk);
|
||
else
|
||
prev = SCM_CDRLOC (walk);
|
||
}
|
||
|
||
return lst;
|
||
}
|
||
#undef FUNC_NAME
|
||
|
||
|
||
|
||
|
||
|
||
SCM_DEFINE (scm_delq, "delq", 2, 0, 0,
|
||
(SCM item, SCM lst),
|
||
"@deffnx primitive delv item lst
|
||
@deffnx primitive delete item lst
|
||
Return a newly-created copy of @var{lst} with @var{item} removed. These
|
||
procedures mirror @code{memq}, @code{memv} and @code{member}:
|
||
@code{delq} compares elements of @var{lst} against @var{item} with
|
||
@code{eq?}, @code{delv} uses @code{eqv?} and @code{delete} uses @code{equal?}")
|
||
#define FUNC_NAME s_scm_delq
|
||
{
|
||
SCM copy = scm_list_copy (lst);
|
||
return scm_delq_x (item, copy);
|
||
}
|
||
#undef FUNC_NAME
|
||
|
||
SCM_DEFINE (scm_delv, "delv", 2, 0, 0,
|
||
(SCM item, SCM lst),
|
||
"")
|
||
#define FUNC_NAME s_scm_delv
|
||
{
|
||
SCM copy = scm_list_copy (lst);
|
||
return scm_delv_x (item, copy);
|
||
}
|
||
#undef FUNC_NAME
|
||
|
||
SCM_DEFINE (scm_delete, "delete", 2, 0, 0,
|
||
(SCM item, SCM lst),
|
||
"")
|
||
#define FUNC_NAME s_scm_delete
|
||
{
|
||
SCM copy = scm_list_copy (lst);
|
||
return scm_delete_x (item, copy);
|
||
}
|
||
#undef FUNC_NAME
|
||
|
||
|
||
SCM_DEFINE (scm_delq1_x, "delq1!", 2, 0, 0,
|
||
(SCM item, SCM lst),
|
||
"")
|
||
#define FUNC_NAME s_scm_delq1_x
|
||
{
|
||
SCM walk;
|
||
SCM *prev;
|
||
|
||
for (prev = &lst, walk = lst;
|
||
SCM_CONSP (walk);
|
||
walk = SCM_CDR (walk))
|
||
{
|
||
if (SCM_CAR (walk) == item)
|
||
{
|
||
*prev = SCM_CDR (walk);
|
||
break;
|
||
}
|
||
else
|
||
prev = SCM_CDRLOC (walk);
|
||
}
|
||
|
||
return lst;
|
||
}
|
||
#undef FUNC_NAME
|
||
|
||
|
||
SCM_DEFINE (scm_delv1_x, "delv1!", 2, 0, 0,
|
||
(SCM item, SCM lst),
|
||
"")
|
||
#define FUNC_NAME s_scm_delv1_x
|
||
{
|
||
SCM walk;
|
||
SCM *prev;
|
||
|
||
for (prev = &lst, walk = lst;
|
||
SCM_CONSP (walk);
|
||
walk = SCM_CDR (walk))
|
||
{
|
||
if (SCM_BOOL_F != scm_eqv_p (SCM_CAR (walk), item))
|
||
{
|
||
*prev = SCM_CDR (walk);
|
||
break;
|
||
}
|
||
else
|
||
prev = SCM_CDRLOC (walk);
|
||
}
|
||
|
||
return lst;
|
||
}
|
||
#undef FUNC_NAME
|
||
|
||
|
||
SCM_DEFINE (scm_delete1_x, "delete1!", 2, 0, 0,
|
||
(SCM item, SCM lst),
|
||
"")
|
||
#define FUNC_NAME s_scm_delete1_x
|
||
{
|
||
SCM walk;
|
||
SCM *prev;
|
||
|
||
for (prev = &lst, walk = lst;
|
||
SCM_CONSP (walk);
|
||
walk = SCM_CDR (walk))
|
||
{
|
||
if (SCM_BOOL_F != scm_equal_p (SCM_CAR (walk), item))
|
||
{
|
||
*prev = SCM_CDR (walk);
|
||
break;
|
||
}
|
||
else
|
||
prev = SCM_CDRLOC (walk);
|
||
}
|
||
|
||
return lst;
|
||
}
|
||
#undef FUNC_NAME
|
||
|
||
|
||
|
||
void
|
||
scm_init_list ()
|
||
{
|
||
#include "list.x"
|
||
}
|