I’ve tested this with Paul Dietz’ test suite, and our integrated tests also have no problem with it. My compilation was --with-union-type and --with-xemacs-compiler=g++, so it’s not super likely that there are build problems, but Windows can always surprise me. The bounds checking was something added for ANSI Common Lisp, and cl*.el in general doesn’t reflect it. Nor does my C implementaion of #'reduce, for the moment. APPROVE COMMIT NOTE: This patch has been committed. # HG changeset patch # User Aidan Kehoe <kehoea(a)parhasard.net&gt; # Date 1283790591 -3600 # Node ID 69f687b3ba9d833c9f7b2872e679b511df1c578b # Parent dceee3855f15dbb5f66e965b04eb0e503fad8da5 Move #'replace to C, add bounds-checking to it and to #'fill. 2010-09-06 Aidan Kehoe <kehoea(a)parhasard.net&gt; Move #'replace to C; add bounds checking to it and to #'fill. * fns.c (Fsubseq, Ffill, mapcarX): Don't #'nreverse in #'subseq, use fill_string_range and check bounds in #'fill, use replace_string_range() in #'map-into avoiding quadratic time when modfiying the string. * fns.c (check_sequence_range, fill_string_range) (replace_string_range, replace_string_range_1, Freplace): New functions; check that arguments fit sequence dimensions, fill a string range with a given character, replace a string range from an Ibyte pointer. diff -r dceee3855f15 -r 69f687b3ba9d lisp/ChangeLog --- a/lisp/ChangeLog Sun Sep 05 20:31:05 2010 +0100 +++ b/lisp/ChangeLog Mon Sep 06 17:29:51 2010 +0100 ＠＠ -1,3 +1,9 ＠＠ +2010-09-06 Aidan Kehoe <kehoea(a)parhasard.net&gt; + + * cl-seq.el (replace): + Move this function, with added bounds-checking per ANSI Common + Lisp, to fns.c. + 2010-09-05 Aidan Kehoe <kehoea(a)parhasard.net&gt; * x-compose.el (define-compose-map, compose-map) diff -r dceee3855f15 -r 69f687b3ba9d lisp/cl-seq.el --- a/lisp/cl-seq.el Sun Sep 05 20:31:05 2010 +0100 +++ b/lisp/cl-seq.el Mon Sep 06 17:29:51 2010 +0100 ＠＠ -142,48 +142,7 ＠＠ (defvar cl-if) (defvar cl-if-not) (defvar cl-key) -(defun replace (cl-seq1 cl-seq2 &rest cl-keys) - "Replace the elements of SEQ1 with the elements of SEQ2. -SEQ1 is destructively modified, then returned. -Keywords supported: :start1 :end1 :start2 :end2 -:start1 and :end1 specify a subsequence of SEQ1, and :start2 and :end2 a -subsequence of SEQ2; see `search' for more information." - (cl-parsing-keywords ((:start1 0) :end1 (:start2 0) :end2) () - (if (and (eq cl-seq1 cl-seq2) (<= cl-start2 cl-start1)) - (or (= cl-start1 cl-start2) - (let* ((cl-len (length cl-seq1)) - (cl-n (min (- (or cl-end1 cl-len) cl-start1) - (- (or cl-end2 cl-len) cl-start2)))) - (while (>= (setq cl-n (1- cl-n)) 0) - (cl-set-elt cl-seq1 (+ cl-start1 cl-n) - (elt cl-seq2 (+ cl-start2 cl-n)))))) - (if (listp cl-seq1) - (let ((cl-p1 (nthcdr cl-start1 cl-seq1)) - (cl-n1 (if cl-end1 (- cl-end1 cl-start1) 4000000))) - (if (listp cl-seq2) - (let ((cl-p2 (nthcdr cl-start2 cl-seq2)) - (cl-n (min cl-n1 - (if cl-end2 (- cl-end2 cl-start2) 4000000)))) - (while (and cl-p1 cl-p2 (>= (setq cl-n (1- cl-n)) 0)) - (setcar cl-p1 (car cl-p2)) - (setq cl-p1 (cdr cl-p1) cl-p2 (cdr cl-p2)))) - (setq cl-end2 (min (or cl-end2 (length cl-seq2)) - (+ cl-start2 cl-n1))) - (while (and cl-p1 (< cl-start2 cl-end2)) - (setcar cl-p1 (aref cl-seq2 cl-start2)) - (setq cl-p1 (cdr cl-p1) cl-start2 (1+ cl-start2))))) - (setq cl-end1 (min (or cl-end1 (length cl-seq1)) - (+ cl-start1 (- (or cl-end2 (length cl-seq2)) - cl-start2)))) - (if (listp cl-seq2) - (let ((cl-p2 (nthcdr cl-start2 cl-seq2))) - (while (< cl-start1 cl-end1) - (aset cl-seq1 cl-start1 (car cl-p2)) - (setq cl-p2 (cdr cl-p2) cl-start1 (1+ cl-start1)))) - (while (< cl-start1 cl-end1) - (aset cl-seq1 cl-start1 (aref cl-seq2 cl-start2)) - (setq cl-start2 (1+ cl-start2) cl-start1 (1+ cl-start1)))))) - cl-seq1)) +;; XEmacs; #'replace is in fns.c. (defun remove* (cl-item cl-seq &rest cl-keys) "Remove all occurrences of ITEM in SEQ. diff -r dceee3855f15 -r 69f687b3ba9d src/ChangeLog --- a/src/ChangeLog Sun Sep 05 20:31:05 2010 +0100 +++ b/src/ChangeLog Mon Sep 06 17:29:51 2010 +0100 ＠＠ -1,3 +1,18 ＠＠ +2010-09-06 Aidan Kehoe <kehoea(a)parhasard.net&gt; + + Move #'replace to C; add bounds checking to it and to #'fill. + + * fns.c (Fsubseq, Ffill, mapcarX): + Don't #'nreverse in #'subseq, use fill_string_range and check + bounds in #'fill, use replace_string_range() in #'map-into + avoiding quadratic time when modfiying the string. + + * fns.c (check_sequence_range, fill_string_range) + (replace_string_range, replace_string_range_1, Freplace): + New functions; check that arguments fit sequence dimensions, fill + a string range with a given character, replace a string range from + an Ibyte pointer. + 2010-09-05 Aidan Kehoe <kehoea(a)parhasard.net&gt; * chartab.c (char_table_default_for_type, diff -r dceee3855f15 -r 69f687b3ba9d src/fns.c --- a/src/fns.c Sun Sep 05 20:31:05 2010 +0100 +++ b/src/fns.c Mon Sep 06 17:29:51 2010 +0100 ＠＠ -54,11 +54,12 ＠＠ /* NOTE: This symbol is also used in lread.c */ #define FEATUREP_SYNTAX -Lisp_Object Qstring_lessp, Qsort, Qmerge, Qfill; +Lisp_Object Qstring_lessp, Qsort, Qmerge, Qfill, Qreplace; Lisp_Object Qidentity; Lisp_Object Qvector, Qarray, Qbit_vector, QsortX, Q_from_end, Q_initial_value; Lisp_Object Qmapconcat, QmapcarX, Qmapvector, Qmapcan, Qmapc, Qmap, Qmap_into; Lisp_Object Qsome, Qevery, Qmaplist, Qmapl, Qmapcon, Qreduce; +Lisp_Object Q_start1, Q_start2, Q_end1, Q_end2; Lisp_Object Qbase64_conversion_error; ＠＠ -73,6 +74,20 ＠＠ invalid_state_2 ("object modified while traversing it", func, object); } +static void +check_sequence_range (Lisp_Object sequence, Lisp_Object start, + Lisp_Object end, Lisp_Object length) +{ + Elemcount starting = XINT (start), ending, len = XINT (length); + + ending = NILP (end) ? XINT (length) : XINT (end); + + if (!(0 <= starting && starting <= ending && ending <= len)) + { + args_out_of_range_3 (sequence, start, make_int (ending)); + } +} + static Lisp_Object mark_bit_vector (Lisp_Object UNUSED (obj)) { ＠＠ -885,7 +900,7 ＠＠ { CHECK_CHAR_COERCE_INT (elt); string_result_ptr += set_itext_ichar (string_result_ptr, - XCHAR (elt)); + XCHAR (elt)); } } if (args_mse) ＠＠ -1044,8 +1059,8 ＠＠ e = len + e; } - if (!(0 <= s && s <= e && e <= len)) - args_out_of_range_3 (sequence, make_int (s), make_int (e)); + check_sequence_range (sequence, make_int (s), make_int (e), + make_int (len)); if (VECTORP (sequence)) { ＠＠ -1060,18 +1075,24 ＠＠ } else if (LISTP (sequence)) { - Lisp_Object result = Qnil; + Lisp_Object result = Qnil, result_tail; EMACS_INT i; sequence = Fnthcdr (make_int (s), sequence); - for (i = s; i < e; i++) - { - result = Fcons (Fcar (sequence), result); + if (s < e) + { + result = result_tail = Fcons (Fcar (sequence), Qnil); sequence = Fcdr (sequence); - } - - return Fnreverse (result); + for (i = s + 1; i < e; i++) + { + XSETCDR (result_tail, Fcons (Fcar (sequence), Qnil)); + sequence = Fcdr (sequence); + result_tail = XCDR (result_tail); + } + } + + return result; } else if (BIT_VECTORP (sequence)) { ＠＠ -3872,6 +3893,29 ＠＠ }  +static Lisp_Object replace_string_range_1 (Lisp_Object dest, + Lisp_Object start, + Lisp_Object end, + const Ibyte *source, + const Ibyte *source_limit, + Lisp_Object item); + +/* Fill the substring of DEST beginning at START and ending before END with + the character ITEM. If DEST does not have sufficient space for END - + START characters at START, write as many as is possible without changing + the character length of DEST. Update the string modification flag and do + any sledgehammer checks we have turned on. + + START must be a Lisp integer. END can be nil, indicating the length of the + string, or a Lisp integer. The condition (<= 0 START END (length DEST)) + must hold, or fill_string_range() will signal an error. */ +static Lisp_Object +fill_string_range (Lisp_Object dest, Lisp_Object item, Lisp_Object start, + Lisp_Object end) +{ + return replace_string_range_1 (dest, start, end, NULL, NULL, item); +} + DEFUN ("fill", Ffill, 2, MANY, 0, /* Destructively modify SEQUENCE by replacing each element with ITEM. SEQUENCE is a list, vector, bit vector, or string. ＠＠ -3881,21 +3925,20 ＠＠ exclusive upper bound on the elements of SEQUENCE to be modified, and defaults to the length of SEQUENCE. -arguments: (SEQUENCE ITEM &key (START 0) END) +arguments: (SEQUENCE ITEM &key (START 0) (END (length SEQUENCE))) */ (int nargs, Lisp_Object *args)) { Lisp_Object sequence = args[0]; Lisp_Object item = args[1]; - Elemcount starting = 0, ending = EMACS_INT_MAX, ii; - - PARSE_KEYWORDS (Qfill, nargs, args, 2, 2, (start, end), - (start = Qzero, end = Qunbound), 0); + Elemcount starting = 0, ending = EMACS_INT_MAX, ii, len; + + PARSE_KEYWORDS (Qfill, nargs, args, 2, 2, (start, end), (start = Qzero), 0); CHECK_NATNUM (start); starting = XINT (start); - if (!UNBOUNDP (end)) + if (!NILP (end)) { CHECK_NATNUM (end); ending = XINT (end); ＠＠ -3904,49 +3947,21 ＠＠ retry: if (STRINGP (sequence)) { - Bytecount prefix_bytecount, item_bytecount, delta; - Ibyte item_buf[MAX_ICHAR_LEN]; - Ibyte *p, *pend; - CHECK_CHAR_COERCE_INT (item); - CHECK_LISP_WRITEABLE (sequence); - sledgehammer_check_ascii_begin (sequence); - item_bytecount = set_itext_ichar (item_buf, XCHAR (item)); - - p = XSTRING_DATA (sequence); - p = (Ibyte *) itext_n_addr (p, starting); - prefix_bytecount = p - XSTRING_DATA (sequence); - - ending = min (ending, string_char_length (sequence)); - pend = (Ibyte *) itext_n_addr (p, ending - starting); - delta = ((ending - starting) * item_bytecount) - (pend - p); - - /* Resize the string if the bytecount for the area being modified is - different. */ - if (delta) - { - resize_string (sequence, prefix_bytecount, delta); - /* No need to zero-terminate the string, resize_string has done - that for us. */ - p = XSTRING_DATA (sequence) + prefix_bytecount; - pend = p + ((ending - starting) * item_bytecount); - } - - for (; p < pend; p += item_bytecount) - memcpy (p, item_buf, item_bytecount); - - - init_string_ascii_begin (sequence); - bump_string_modiff (sequence); - sledgehammer_check_ascii_begin (sequence); + + fill_string_range (sequence, item, start, end); } else if (VECTORP (sequence)) { Lisp_Object *p = XVECTOR_DATA (sequence); + CHECK_LISP_WRITEABLE (sequence); - - ending = min (ending, XVECTOR_LENGTH (sequence)); + len = XVECTOR_LENGTH (sequence); + + check_sequence_range (sequence, start, end, make_int (len)); + ending = min (ending, len); + for (ii = starting; ii < ending; ++ii) { p[ii] = item; ＠＠ -3956,11 +3971,15 ＠＠ { Lisp_Bit_Vector *v = XBIT_VECTOR (sequence); int bit; + CHECK_BIT (item); bit = XINT (item); CHECK_LISP_WRITEABLE (sequence); - - ending = min (ending, bit_vector_length (v)); + len = bit_vector_length (v); + + check_sequence_range (sequence, start, end, make_int (len)); + ending = min (ending, len); + for (ii = starting; ii < ending; ++ii) { set_bit_vector_bit (v, ii, bit); ＠＠ -3985,6 +4004,11 ＠＠ } ++counting; } + + if (counting != ending) + { + check_sequence_range (sequence, start, end, Flength (sequence)); + } } else { ＠＠ -4129,6 +4153,24 ＠＠ }  +/* Replace the substring of DEST beginning at START and ending before END + with the text at SOURCE, which is END - START characters long and + SOURCE_LIMIT - SOURCE octets long. If DEST does not have sufficient + space for END - START characters at START, write as many as is possible + without changing the length of DEST. Update the string modification flag + and do any sledgehammer checks we have turned on in this build. + + START must be a Lisp integer. END can be nil, indicating the length of the + string, or a Lisp integer. The condition (<= 0 START END (length DEST)) + must hold, or replace_string_range() will signal an error. */ +static Lisp_Object +replace_string_range (Lisp_Object dest, Lisp_Object start, Lisp_Object end, + const Ibyte *source, const Ibyte *source_limit) +{ + return replace_string_range_1 (dest, start, end, source, source_limit, + Qnil); +} + /* This is the guts of several mapping functions. Call FUNCTION CALL_COUNT times, with NSEQUENCES arguments each time, ＠＠ -4168,6 +4210,7 ＠＠ { Lisp_Object called, *args; struct gcpro gcpro1, gcpro2; + Ibyte *lisp_vals_staging, *cursor; int i, j; assert ((EQ (caller, Qsome) || EQ (caller, Qevery)) ? vals == NULL : 1); ＠＠ -4224,9 +4267,15 ＠＠ if (!EQ (caller, Qsome) && !EQ (caller, Qevery)) { assert (LRECORDP (lisp_vals)); + lisp_vals_type = (enum lrecord_type) XRECORD_LHEADER (lisp_vals)->type; - assert (NILP (lisp_vals) || lisp_vals_type != lrecord_type_symbol); + + if (lrecord_type_string == lisp_vals_type) + { + lisp_vals_staging = cursor + = alloca_ibytes (call_count * MAX_ICHAR_LEN); + } } for (i = 0; i < call_count; ++i) ＠＠ -4305,8 +4354,7 ＠＠ switch (lisp_vals_type) { case lrecord_type_symbol: - /* This is #'mapc; the result of the funcall is - discarded. */ + /* Discard the result of funcall. */ break; case lrecord_type_cons: { ＠＠ -4331,10 +4379,8 ＠＠ } case lrecord_type_string: { - /* If this ever becomes a code hotspot, we can keep - around pointers into the data of the string, checking - each time that it hasn't been relocated. */ - Faset (lisp_vals, make_int (i), called); + CHECK_CHAR_COERCE_INT (called); + cursor += set_itext_ichar (cursor, XCHAR (called)); break; } case lrecord_type_bit_vector: ＠＠ -4354,7 +4400,15 ＠＠ } } } - } + + if (!EQ (caller, Qsome) && !EQ (caller, Qevery) && + lrecord_type_string == lisp_vals_type) + { + replace_string_range (lisp_vals, Qzero, make_int (call_count), + lisp_vals_staging, cursor); + } + } + UNGCPRO; } ＠＠ -5302,6 +5356,590 ＠＠ return old; } +/* This function is the implementation of fill_string_range() and + replace_string_range(); see the comments for those functions. */ +static Lisp_Object +replace_string_range_1 (Lisp_Object dest, Lisp_Object start, Lisp_Object end, + const Ibyte *source, const Ibyte *source_limit, + Lisp_Object item) +{ + Ibyte *destp = XSTRING_DATA (dest), *p = destp, + *pend = p + XSTRING_LENGTH (dest), *pcursor, item_buf[MAX_ICHAR_LEN]; + Bytecount prefix_bytecount, source_len = source_limit - source; + Charcount ii = 0, starting = XINT (start), ending, len; + Elemcount delta; + + while (ii < starting && p < pend) + { + INC_IBYTEPTR (p); + ii++; + } + + pcursor = p; + + if (NILP (end)) + { + while (pcursor < pend) + { + INC_IBYTEPTR (pcursor); + ii++; + } + + ending = len = ii; + } + else + { + ending = XINT (end); + while (ii < ending && pcursor < pend) + { + INC_IBYTEPTR (pcursor); + ii++; + } + } + + if (pcursor == pend) + { + /* We have the length, check it for our callers. */ + check_sequence_range (dest, start, end, make_int (ii)); + } + + if (!(p == pend || p == pcursor)) + { + prefix_bytecount = p - destp; + + if (!NILP (item)) + { + assert (source == NULL && source_limit == NULL); + source_len = set_itext_ichar (item_buf, XCHAR (item)); + delta = (source_len * (ending - starting)) - (pcursor - p); + } + else + { + assert (source != NULL && source_limit != NULL); + delta = source_len - (pcursor - p); + } + + if (delta) + { + resize_string (dest, prefix_bytecount, delta); + destp = XSTRING_DATA (dest); + pcursor = destp + prefix_bytecount + (pcursor - p); + p = destp + prefix_bytecount; + } + + if (CHARP (item)) + { + while (starting < ending) + { + memcpy (p, item_buf, source_len); + p += source_len; + starting++; + } + } + else + { + while (starting < ending && source < source_limit) + { + source_len = itext_copy_ichar (source, p); + p += source_len, source += source_len; + } + } + + init_string_ascii_begin (dest); + bump_string_modiff (dest); + sledgehammer_check_ascii_begin (dest); + } + + return dest; +} + +DEFUN ("replace", Freplace, 2, MANY, 0, /* +Replace the elements of SEQUENCE-ONE with the elements of SEQUENCE-TWO. + +SEQUENCE-ONE is destructively modified, and returned. Its length is not +changed. + +Keywords:start1 and :end1 specify a subsequence of SEQUENCE-ONE, and +:start2 and :end2 a subsequence of SEQUENCE-TWO. See `search' for more +information. + +arguments: (SEQUENCE-ONE SEQUENCE-TWO &key (START1 0) (END1 (length SEQUENCE-ONE)) (START2 0) (END2 (length SEQUENCE-TWO))) +*/ + (int nargs, Lisp_Object *args)) +{ + Lisp_Object sequence1 = args[0], sequence2 = args[1], + result = sequence1; + Elemcount starting1, ending1 = EMACS_INT_MAX, starting2; + Elemcount ending2 = EMACS_INT_MAX, counting, startcounting; + Boolint sequence1_listp, sequence2_listp, + overwriting = EQ (sequence1, sequence2); + + PARSE_KEYWORDS (Qreplace, nargs, args, 2, 4, (start1, end1, start2, end2), + (start1 = start2 = Qzero), 0); + + CHECK_SEQUENCE (sequence1); + CHECK_LISP_WRITEABLE (sequence1); + + CHECK_SEQUENCE (sequence2); + + CHECK_NATNUM (start1); + starting1 = XINT (start1); + CHECK_NATNUM (start2); + starting2 = XINT (start2); + + if (!NILP (end1)) + { + CHECK_NATNUM (end1); + ending1 = XINT (end1); + + if (!(starting1 <= ending1)) + { + args_out_of_range_3 (sequence1, start1, end1); + } + } + + if (!NILP (end2)) + { + CHECK_NATNUM (end2); + ending2 = XINT (end2); + + if (!(starting2 <= ending2)) + { + args_out_of_range_3 (sequence1, start2, end2); + } + } + + sequence1_listp = LISTP (sequence1); + sequence2_listp = LISTP (sequence2); + + overwriting = overwriting && starting2 <= starting1; + + if (sequence1_listp && !ZEROP (start1)) + { + Lisp_Object nthcdrd = Fnthcdr (start1, sequence1); + + if (NILP (nthcdrd)) + { + check_sequence_range (sequence1, start1, end1, Flength (sequence1)); + /* Give up early here. */ + return result; + } + + sequence1 = nthcdrd; + ending1 -= starting1; + starting1 = 0; + } + + if (sequence2_listp && !ZEROP (start2)) + { + Lisp_Object nthcdrd = Fnthcdr (start2, sequence2); + + if (NILP (nthcdrd)) + { + check_sequence_range (sequence1, start1, end1, Flength (sequence1)); + /* Nothing available to replace sequence1's contents. */ + return result; + } + + sequence2 = nthcdrd; + ending2 -= starting2; + starting2 = 0; + } + + if (overwriting) + { + if (EQ (start1, start2)) + { + return result; + } + + /* Our ranges may overlap. Save the data that might be overwritten. */ + + if (CONSP (sequence2)) + { + Elemcount len = XINT (Flength (sequence2)); + Lisp_Object *subsequence + = alloca_array (Lisp_Object, min (ending2, len)); + Elemcount counting = 0, ii = 0; + + LIST_LOOP_2 (elt, sequence2) + { + if (counting == ending2) + { + break; + } + + subsequence[ii++] = elt; + counting++; + } + + check_sequence_range (sequence1, start1, end1, + /* The XINT (start2) is intentional here; we + called #'length after doing (nthcdr + start2 sequence2). */ + make_int (XINT (start2) + len)); + check_sequence_range (sequence2, start2, end2, + make_int (XINT (start2) + len)); + + while (starting1 < ending1 + && starting2 < ending2 && !NILP (sequence1)) + { + XSETCAR (sequence1, subsequence[starting2]); + sequence1 = XCDR (sequence1); + starting1++; + starting2++; + } + } + else if (STRINGP (sequence2)) + { + Ibyte *p = XSTRING_DATA (sequence2), + *pend = p + XSTRING_LENGTH (sequence2), *pcursor, + *staging; + Bytecount ii = 0; + + while (ii < starting2 && p < pend) + { + INC_IBYTEPTR (p); + ii++; + } + + pcursor = p; + + while (ii < ending2 && starting1 < ending1 && pcursor < pend) + { + INC_IBYTEPTR (pcursor); + starting1++; + ii++; + } + + if (pcursor == pend) + { + check_sequence_range (sequence1, start1, end1, make_int (ii)); + check_sequence_range (sequence2, start2, end2, make_int (ii)); + } + else + { + assert ((pcursor - p) > 0); + staging = alloca_ibytes (pcursor - p); + memcpy (staging, p, pcursor - p); + replace_string_range (result, start1, + make_int (starting1), + staging, staging + (pcursor - p)); + } + } + else + { + Elemcount seq_len = XINT (Flength (sequence2)), ii = 0, + subseq_len = min (min (ending1 - starting1, seq_len - starting1), + min (ending2 - starting2, seq_len - starting2)); + Lisp_Object *subsequence = alloca_array (Lisp_Object, subseq_len); + + check_sequence_range (sequence1, start1, end1, make_int (seq_len)); + check_sequence_range (sequence2, start2, end2, make_int (seq_len)); + + while (starting2 < ending2 && ii < seq_len) + { + subsequence[ii] = Faref (sequence2, make_int (starting2)); + ii++, starting2++; + } + + ii = 0; + + while (starting1 < ending1 && ii < seq_len) + { + Faset (sequence1, make_int (starting1), subsequence[ii]); + ii++, starting1++; + } + } + } + else if (sequence1_listp && sequence2_listp) + { + Lisp_Object sequence1_tortoise = sequence1, + sequence2_tortoise = sequence2; + Elemcount shortest_len = 0; + + counting = startcounting = min (ending1, ending2); + + while (counting-- > 0 && !NILP (sequence1) && !NILP (sequence2)) + { + XSETCAR (sequence1, + CONSP (sequence2) ? XCAR (sequence2) +: Fcar (sequence2)); + sequence1 = CONSP (sequence1) ? XCDR (sequence1) +: Fcdr (sequence1); + sequence2 = CONSP (sequence2) ? XCDR (sequence2) +: Fcdr (sequence2); + + shortest_len++; + + if (startcounting - counting > CIRCULAR_LIST_SUSPICION_LENGTH) + { + if (counting & 1) + { + sequence1_tortoise = XCDR (sequence1_tortoise); + sequence2_tortoise = XCDR (sequence2_tortoise); + } + + if (EQ (sequence1, sequence1_tortoise)) + { + signal_circular_list_error (sequence1); + } + + if (EQ (sequence2, sequence2_tortoise)) + { + signal_circular_list_error (sequence2); + } + } + } + + if (NILP (sequence1)) + { + check_sequence_range (sequence1, start1, end1, + make_int (XINT (start1) + shortest_len)); + } + else if (NILP (sequence2)) + { + check_sequence_range (sequence2, start2, end2, + make_int (XINT (start2) + shortest_len)); + } + } + else if (sequence1_listp) + { + if (STRINGP (sequence2)) + { + Ibyte *s2_data = XSTRING_DATA (sequence2), + *s2_end = s2_data + XSTRING_LENGTH (sequence2); + Elemcount char_count = 0; + Lisp_Object character; + + while (char_count < starting2 && s2_data < s2_end) + { + INC_IBYTEPTR (s2_data); + char_count++; + } + + while (starting1 < ending1 && starting2 < ending2 + && s2_data < s2_end && !NILP (sequence1)) + { + character = make_char (itext_ichar (s2_data)); + CONSP (sequence1) ? + XSETCAR (sequence1, character) +: Fsetcar (sequence1, character); + sequence1 = XCDR (sequence1); + starting1++; + starting2++; + char_count++; + INC_IBYTEPTR (s2_data); + } + + if (NILP (sequence1)) + { + check_sequence_range (sequence1, start1, end1, + make_int (XINT (start1) + starting1)); + } + + if (s2_data == s2_end) + { + check_sequence_range (sequence2, start2, end2, + make_int (char_count)); + } + } + else + { + Elemcount len2 = XINT (Flength (sequence2)); + check_sequence_range (sequence2, start2, end2, make_int (len2)); + + ending2 = min (ending2, len2); + while (starting2 < ending2 + && starting1 < ending1 && !NILP (sequence1)) + { + CHECK_CONS (sequence1); + XSETCAR (sequence1, Faref (sequence2, make_int (starting2))); + sequence1 = XCDR (sequence1); + starting1++; + starting2++; + } + + if (NILP (sequence1)) + { + check_sequence_range (sequence1, start1, end1, + make_int (XINT (start1) + starting1)); + } + } + } + else if (sequence2_listp) + { + if (STRINGP (sequence1)) + { + Elemcount ii = 0, count, len = string_char_length (sequence1); + Ibyte *staging, *cursor; + Lisp_Object obj; + + check_sequence_range (sequence1, start1, end1, make_int (len)); + ending1 = min (ending1, len); + count = ending1 - starting1; + staging = cursor = alloca_ibytes (count * MAX_ICHAR_LEN); + + while (ii < count && !NILP (sequence2)) + { + obj = CONSP (sequence2) ? XCAR (sequence2) +: Fcar (sequence2); + + CHECK_CHAR_COERCE_INT (obj); + cursor += set_itext_ichar (cursor, XCHAR (obj)); + ii++; + sequence2 = XCDR (sequence2); + } + + if (NILP (sequence2)) + { + check_sequence_range (sequence2, start2, end2, + make_int (XINT (start2) + ii)); + } + + replace_string_range (result, start1, make_int (XINT (start1) + ii), + staging, cursor); + } + else + { + Elemcount len = XINT (Flength (sequence1)); + + check_sequence_range (sequence1, start2, end1, make_int (len)); + ending1 = min (ending2, min (ending1, len)); + + while (starting1 < ending1 && !NILP (sequence2)) + { + Faset (sequence1, make_int (starting1), + CONSP (sequence2) ? XCAR (sequence2) +: Fcar (sequence2)); + sequence2 = XCDR (sequence2); + starting1++; + starting2++; + } + + if (NILP (sequence2)) + { + check_sequence_range (sequence2, start2, end2, + make_int (XINT (start2) + starting2)); + } + } + } + else + { + if (STRINGP (sequence1) && STRINGP (sequence2)) + { + Ibyte *p2 = XSTRING_DATA (sequence2), + *p2end = p2 + XSTRING_LENGTH (sequence2), *p2cursor; + Charcount ii = 0, len1 = string_char_length (sequence1); + + while (ii < starting2 && p2 < p2end) + { + INC_IBYTEPTR (p2); + ii++; + } + + p2cursor = p2; + ending1 = min (ending1, len1); + + while (ii < ending2 && starting1 < ending1 && p2cursor < p2end) + { + INC_IBYTEPTR (p2cursor); + ii++; + starting1++; + } + + if (p2cursor == p2end) + { + check_sequence_range (sequence2, start2, end2, make_int (ii)); + } + + /* This isn't great; any error message won't necessarily reflect + the END1 that was supplied to #'replace. */ + replace_string_range (result, start1, make_int (starting1), + p2, p2cursor); + } + else if (STRINGP (sequence1)) + { + Ibyte *staging, *cursor; + Elemcount count, len1 = string_char_length (sequence1); + Elemcount len2 = XINT (Flength (sequence2)), ii = 0;; + Lisp_Object obj; + + check_sequence_range (sequence1, start1, end1, make_int (len1)); + check_sequence_range (sequence2, start2, end2, make_int (len2)); + + ending1 = min (ending1, len1); + ending2 = min (ending2, len2); + count = min (ending1 - starting1, ending2 - starting2); + staging = cursor = alloca_ibytes (count * MAX_ICHAR_LEN); + + ii = 0; + while (ii < count) + { + obj = Faref (sequence2, make_int (starting2)); + + CHECK_CHAR_COERCE_INT (obj); + cursor += set_itext_ichar (cursor, XCHAR (obj)); + starting2++, ii++; + } + + replace_string_range (result, start1, + make_int (XINT (start1) + count), + staging, cursor); + } + else if (STRINGP (sequence2)) + { + Ibyte *p2 = XSTRING_DATA (sequence2), + *p2end = p2 + XSTRING_LENGTH (sequence2); + Elemcount len1 = XINT (Flength (sequence1)), ii = 0; + + check_sequence_range (sequence1, start1, end1, make_int (len1)); + ending1 = min (ending1, len1); + + while (ii < starting2 && p2 < p2end) + { + INC_IBYTEPTR (p2); + ii++; + } + + while (p2 < p2end && starting1 < ending1 && starting2 < ending2) + { + Faset (sequence1, make_int (starting1), + make_char (itext_ichar (p2))); + INC_IBYTEPTR (p2); + starting1++; + starting2++; + ii++; + } + + if (p2 == p2end) + { + check_sequence_range (sequence2, start2, end2, make_int (ii)); + } + } + else + { + Elemcount len1 = XINT (Flength (sequence1)), + len2 = XINT (Flength (sequence2)); + + check_sequence_range (sequence1, start1, end1, make_int (len1)); + check_sequence_range (sequence2, start2, end2, make_int (len2)); + + ending1 = min (ending1, len1); + ending2 = min (ending2, len2); + + while (starting1 < ending1 && starting2 < ending2) + { + Faset (sequence1, make_int (starting1), + Faref (sequence2, make_int (starting2))); + starting1++; + starting2++; + } + } + } + + return result; +}  Lisp_Object add_suffix_to_symbol (Lisp_Object symbol, const Ascbyte *ascii_string) ＠＠ -5947,6 +6585,7 ＠＠ DEFSYMBOL (Qbit_vector); defsymbol (&QsortX, "sort*"); DEFSYMBOL (Qreduce); + DEFSYMBOL (Qreplace); DEFSYMBOL (Qmapconcat); defsymbol (&QmapcarX, "mapcar*"); ＠＠ -5963,6 +6602,10 ＠＠ DEFKEYWORD (Q_from_end); DEFKEYWORD (Q_initial_value); + DEFKEYWORD (Q_start1); + DEFKEYWORD (Q_start2); + DEFKEYWORD (Q_end1); + DEFKEYWORD (Q_end2); DEFSYMBOL (Qyes_or_no_p); ＠＠ -6062,6 +6705,7 ＠＠ DEFSUBR (Freduce); DEFSUBR (Freplace_list); + DEFSUBR (Freplace); DEFSUBR (Fload_average); DEFSUBR (Ffeaturep); DEFSUBR (Frequire); -- “Apart from the nine-banded armadillo, man is the only natural host of Mycobacterium leprae, although it can be grown in the footpads of mice.” -- Kumar & Clark, Clinical Medicine, summarising improbable leprosy research _______________________________________________ XEmacs-Patches mailing list XEmacs-Patches(a)xemacs.org http://calypso.tux.org/mailman/listinfo/xemacs-patches