[gforth] / gforth / prim

gforth: gforth/prim

1 :	anton	1.1	\ Gforth primitives
2 :
3 :	anton	1.62	\ Copyright (C) 1995,1996,1997,1998,2000 Free Software Foundation, Inc.
4 :	anton	1.1
5 :			\ This file is part of Gforth.
6 :
7 :			\ Gforth is free software; you can redistribute it and/or
8 :			\ modify it under the terms of the GNU General Public License
9 :			\ as published by the Free Software Foundation; either version 2
10 :			\ of the License, or (at your option) any later version.
11 :
12 :			\ This program is distributed in the hope that it will be useful,
13 :			\ but WITHOUT ANY WARRANTY; without even the implied warranty of
14 :			\ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 :			\ GNU General Public License for more details.
16 :
17 :			\ You should have received a copy of the GNU General Public License
18 :			\ along with this program; if not, write to the Free Software
19 :	anton	1.63	\ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
20 :	anton	1.1
21 :
22 :			\ WARNING: This file is processed by m4. Make sure your identifiers
23 :			\ don't collide with m4's (e.g. by undefining them).
24 :			\
25 :			\
26 :			\
27 :			\ This file contains primitive specifications in the following format:
28 :			\
29 :	anton	1.47	\ forth name ( stack effect ) category [pronunciation]
30 :	anton	1.1	\ [""glossary entry""]
31 :			\ C code
32 :			\ [:
33 :			\ Forth code]
34 :			\
35 :	anton	1.47	\ Note: Fields in brackets are optional. Word specifications have to
36 :			\ be separated by at least one empty line
37 :	anton	1.1	\
38 :			\ Both pronounciation and stack items (in the stack effect) must
39 :	anton	1.48	\ conform to the C identifier syntax or the C compiler will complain.
40 :			\ If you don't have a pronounciation field, the Forth name is used,
41 :			\ and has to conform to the C identifier syntax.
42 :	anton	1.1	\
43 :			\ These specifications are automatically translated into C-code for the
44 :			\ interpreter and into some other files. I hope that your C compiler has
45 :			\ decent optimization, otherwise the automatically generated code will
46 :			\ be somewhat slow. The Forth version of the code is included for manual
47 :			\ compilers, so they will need to compile only the important words.
48 :			\
49 :			\ Note that stack pointer adjustment is performed according to stack
50 :			\ effect by automatically generated code and NEXT is automatically
51 :			\ appended to the C code. Also, you can use the names in the stack
52 :			\ effect in the C code. Stack access is automatic. One exception: if
53 :			\ your code does not fall through, the results are not stored into the
54 :			\ stack. Use different names on both sides of the '--', if you change a
55 :			\ value (some stores to the stack are optimized away).
56 :			\
57 :			\
58 :			\
59 :			\ The stack variables have the following types:
60 :			\
61 :			\ name matches type
62 :			\ f.* Bool
63 :			\ c.* Char
64 :			\ [nw].* Cell
65 :			\ u.* UCell
66 :			\ d.* DCell
67 :			\ ud.* UDCell
68 :			\ r.* Float
69 :			\ a_.* Cell *
70 :			\ c_.* Char *
71 :			\ f_.* Float *
72 :			\ df_.* DFloat *
73 :			\ sf_.* SFloat *
74 :			\ xt.* XT
75 :			\ wid.* WID
76 :			\ f83name.* F83Name *
77 :	anton	1.67
78 :			\E get-current prefixes set-current
79 :			\E
80 :			\E s" Bool" single data-stack type-prefix f
81 :			\E s" Char" single data-stack type-prefix c
82 :			\E s" Cell" single data-stack type-prefix n
83 :			\E s" Cell" single data-stack type-prefix w
84 :			\E s" UCell" single data-stack type-prefix u
85 :			\E s" DCell" double data-stack type-prefix d
86 :			\E s" UDCell" double data-stack type-prefix ud
87 :			\E s" Float" single fp-stack type-prefix r
88 :			\E s" Cell *" single data-stack type-prefix a_
89 :			\E s" Char *" single data-stack type-prefix c_
90 :			\E s" Float *" single data-stack type-prefix f_
91 :			\E s" DFloat *" single data-stack type-prefix df_
92 :			\E s" SFloat *" single data-stack type-prefix sf_
93 :			\E s" Xt" single data-stack type-prefix xt
94 :			\E s" WID" single data-stack type-prefix wid
95 :			\E s" struct F83Name *" single data-stack type-prefix f83name
96 :			\E
97 :			\E return-stack stack-prefix R:
98 :			\E inst-stream stack-prefix #
99 :			\E
100 :			\E set-current
101 :
102 :	anton	1.1	\
103 :			\
104 :			\
105 :			\ In addition the following names can be used:
106 :			\ ip the instruction pointer
107 :			\ sp the data stack pointer
108 :			\ rp the parameter stack pointer
109 :			\ lp the locals stack pointer
110 :			\ NEXT executes NEXT
111 :			\ cfa
112 :			\ NEXT1 executes NEXT1
113 :			\ FLAG(x) makes a Forth flag from a C flag
114 :			\
115 :			\
116 :			\
117 :			\ Percentages in comments are from Koopmans book: average/maximum use
118 :			\ (taken from four, not very representative benchmarks)
119 :			\
120 :			\
121 :			\
122 :			\ To do:
123 :			\
124 :			\ throw execute, cfa and NEXT1 out?
125 :			\ macroize ip, ip++, ip++ (pipelining)?
126 :
127 :			\ these m4 macros would collide with identifiers
128 :			undefine(`index')
129 :			undefine(`shift')
130 :
131 :	anton	1.47	noop ( -- ) gforth
132 :	anton	1.1	;
133 :			:
134 :			;
135 :
136 :	anton	1.47	lit ( -- w ) gforth
137 :	anton	1.1	w = (Cell)NEXT_INST;
138 :			INC_IP(1);
139 :			:
140 :			r> dup @ swap cell+ >r ;
141 :
142 :	anton	1.47	execute ( xt -- ) core
143 :	crook	1.29	""Perform the semantics represented by the execution token, @i{xt}.""
144 :	anton	1.1	ip=IP;
145 :	anton	1.64	IF_spTOS(spTOS = sp[0]);
146 :	anton	1.1	EXEC(xt);
147 :
148 :	anton	1.47	perform ( a_addr -- ) gforth
149 :	anton	1.55	""@code{@@ execute}.""
150 :	anton	1.1	/* and pfe */
151 :			ip=IP;
152 :	anton	1.64	IF_spTOS(spTOS = sp[0]);
153 :	anton	1.1	EXEC((Xt )a_addr);
154 :			:
155 :			@ execute ;
156 :
157 :	jwilke	1.31	\fhas? skipbranchprims 0= [IF]
158 :	pazsan	1.15	\+glocals
159 :	anton	1.1
160 :	anton	1.47	branch-lp+!# ( -- ) gforth branch_lp_plus_store_number
161 :	anton	1.1	/* this will probably not be used */
162 :			lp += (Cell)(IP[1]);
163 :			goto branch;
164 :
165 :	pazsan	1.15	\+
166 :	anton	1.1
167 :	anton	1.47	branch ( -- ) gforth
168 :	anton	1.1	branch:
169 :	anton	1.23	SET_IP((Xt *)(((Cell)IP)+(Cell)NEXT_INST));
170 :	anton	1.1	:
171 :			r> dup @ + >r ;
172 :
173 :			\ condbranch(forthname,restline,code,forthcode)
174 :			\ this is non-syntactical: code must open a brace that is closed by the macro
175 :			define(condbranch,
176 :			$1 $2
177 :	anton	1.23	$3 SET_IP((Xt *)(((Cell)IP)+(Cell)NEXT_INST));
178 :	anton	1.66	TAIL;
179 :	anton	1.1	}
180 :			else
181 :			INC_IP(1);
182 :			$4
183 :
184 :	pazsan	1.15	\+glocals
185 :	anton	1.1
186 :			$1-lp+!# $2_lp_plus_store_number
187 :	anton	1.65	$3 lp += (Cell)(IP[1]);
188 :			SET_IP((Xt *)(((Cell)IP)+(Cell)NEXT_INST));
189 :	anton	1.66	TAIL;
190 :	anton	1.1	}
191 :			else
192 :			INC_IP(2);
193 :
194 :	pazsan	1.15	\+
195 :	anton	1.1	)
196 :
197 :	anton	1.47	condbranch(?branch,( f -- ) f83 question_branch,
198 :	anton	1.1	if (f==0) {
199 :	jwilke	1.5	,:
200 :			0= dup \ !f !f
201 :			r> dup @ \ !f !f IP branchoffset
202 :			rot and + \ !f IP\|IP+branchoffset
203 :			swap 0= cell and + \ IP''
204 :			>r ;)
205 :	anton	1.1
206 :			\ we don't need an lp_plus_store version of the ?dup-stuff, because it
207 :			\ is only used in if's (yet)
208 :
209 :	pazsan	1.15	\+xconds
210 :	anton	1.1
211 :	anton	1.47	?dup-?branch ( f -- f ) new question_dupe_question_branch
212 :	anton	1.1	""The run-time procedure compiled by @code{?DUP-IF}.""
213 :			if (f==0) {
214 :			sp++;
215 :	anton	1.64	IF_spTOS(spTOS = sp[0]);
216 :	anton	1.23	SET_IP((Xt *)(((Cell)IP)+(Cell)NEXT_INST));
217 :	anton	1.1	NEXT;
218 :			}
219 :			else
220 :			INC_IP(1);
221 :
222 :	anton	1.47	?dup-0=-?branch ( f -- ) new question_dupe_zero_equals_question_branch
223 :	anton	1.1	""The run-time procedure compiled by @code{?DUP-0=-IF}.""
224 :			/* the approach taken here of declaring the word as having the stack
225 :			effect ( f -- ) and correcting for it in the branch-taken case costs a
226 :			few cycles in that case, but is easy to convert to a CONDBRANCH
227 :			invocation */
228 :			if (f!=0) {
229 :			sp--;
230 :	anton	1.23	SET_IP((Xt *)(((Cell)IP)+(Cell)NEXT_INST));
231 :	anton	1.1	NEXT;
232 :			}
233 :			else
234 :			INC_IP(1);
235 :
236 :	pazsan	1.15	\+
237 :	jwilke	1.31	\f[THEN]
238 :			\fhas? skiploopprims 0= [IF]
239 :	anton	1.1
240 :	anton	1.65	condbranch((next),( R:n1 -- R:n2 ) cmFORTH paren_next,
241 :			n2=n1-1;
242 :			if (n1) {
243 :	anton	1.1	,:
244 :			r> r> dup 1- >r
245 :			IF dup @ + >r ELSE cell+ >r THEN ;)
246 :
247 :	anton	1.65	condbranch((loop),( R:nlimit R:n1 -- R:nlimit R:n2 ) gforth paren_loop,
248 :			n2=n1+1;
249 :			if (n2 != nlimit) {
250 :	anton	1.1	,:
251 :			r> r> 1+ r> 2dup =
252 :			IF >r 1- >r cell+ >r
253 :			ELSE >r >r dup @ + >r THEN ;)
254 :
255 :	anton	1.65	condbranch((+loop),( n R:nlimit R:n1 -- R:nlimit R:n2 ) gforth paren_plus_loop,
256 :	anton	1.1	/* !! check this thoroughly */
257 :			/* sign bit manipulation and test: (x^y)<0 is equivalent to (x<0) != (y<0) */
258 :			/* dependent upon two's complement arithmetic */
259 :	anton	1.65	Cell olddiff = n1-nlimit;
260 :			n2=n1+n;
261 :	anton	1.1	if ((olddiff^(olddiff+n))>=0 /* the limit is not crossed */
262 :			\|\| (olddiff^n)>=0 /* it is a wrap-around effect */) {
263 :			,:
264 :			r> swap
265 :			r> r> 2dup - >r
266 :			2 pick r@ + r@ xor 0< 0=
267 :			3 pick r> xor 0< 0= or
268 :			IF >r + >r dup @ + >r
269 :			ELSE >r >r drop cell+ >r THEN ;)
270 :
271 :	pazsan	1.15	\+xconds
272 :	anton	1.1
273 :	anton	1.65	condbranch((-loop),( u R:nlimit R:n1 -- R:nlimit R:n2 ) gforth paren_minus_loop,
274 :			UCell olddiff = n1-nlimit;
275 :			n2=n1-u;
276 :	anton	1.1	if (olddiff>u) {
277 :			,)
278 :
279 :	anton	1.65	condbranch((s+loop),( n R:nlimit R:n1 -- R:nlimit R:n2 ) gforth paren_symmetric_plus_loop,
280 :	anton	1.1	""The run-time procedure compiled by S+LOOP. It loops until the index
281 :			crosses the boundary between limit and limit-sign(n). I.e. a symmetric
282 :			version of (+LOOP).""
283 :			/* !! check this thoroughly */
284 :	anton	1.65	Cell diff = n1-nlimit;
285 :	anton	1.1	Cell newdiff = diff+n;
286 :			if (n<0) {
287 :			diff = -diff;
288 :			newdiff = -newdiff;
289 :			}
290 :	anton	1.65	n2=n1+n;
291 :	anton	1.1	if (diff>=0 \|\| newdiff<0) {
292 :			,)
293 :
294 :	pazsan	1.15	\+
295 :	anton	1.1
296 :	anton	1.65	unloop ( R:w1 R:w2 -- ) core
297 :			/* !! alias for 2rdrop */
298 :	anton	1.1	:
299 :			r> rdrop rdrop >r ;
300 :
301 :	anton	1.65	(for) ( ncount -- R:nlimit R:ncount ) cmFORTH paren_for
302 :	anton	1.1	/* or (for) = >r -- collides with unloop! */
303 :	anton	1.65	nlimit=0;
304 :	anton	1.1	:
305 :			r> swap 0 >r >r >r ;
306 :
307 :	anton	1.65	(do) ( nlimit nstart -- R:nlimit R:nstart ) gforth paren_do
308 :	anton	1.1	:
309 :			r> swap rot >r >r >r ;
310 :
311 :	anton	1.65	(?do) ( nlimit nstart -- R:nlimit R:nstart ) gforth paren_question_do
312 :	anton	1.1	if (nstart == nlimit) {
313 :	anton	1.64	IF_spTOS(spTOS = sp[0]);
314 :	anton	1.1	goto branch;
315 :			}
316 :			else {
317 :			INC_IP(1);
318 :			}
319 :			:
320 :			2dup =
321 :			IF r> swap rot >r >r
322 :			dup @ + >r
323 :			ELSE r> swap rot >r >r
324 :			cell+ >r
325 :			THEN ; \ --> CORE-EXT
326 :
327 :	pazsan	1.15	\+xconds
328 :	anton	1.1
329 :	anton	1.65	(+do) ( nlimit nstart -- R:nlimit R:nstart ) gforth paren_plus_do
330 :	anton	1.1	if (nstart >= nlimit) {
331 :	anton	1.64	IF_spTOS(spTOS = sp[0]);
332 :	anton	1.1	goto branch;
333 :			}
334 :			else {
335 :			INC_IP(1);
336 :			}
337 :			:
338 :			swap 2dup
339 :			r> swap >r swap >r
340 :			>=
341 :			IF
342 :			dup @ +
343 :			ELSE
344 :			cell+
345 :			THEN >r ;
346 :
347 :	anton	1.65	(u+do) ( ulimit ustart -- R:ulimit R:ustart ) gforth paren_u_plus_do
348 :	anton	1.1	if (ustart >= ulimit) {
349 :	anton	1.64	IF_spTOS(spTOS = sp[0]);
350 :	anton	1.1	goto branch;
351 :			}
352 :			else {
353 :			INC_IP(1);
354 :			}
355 :			:
356 :			swap 2dup
357 :			r> swap >r swap >r
358 :			u>=
359 :			IF
360 :			dup @ +
361 :			ELSE
362 :			cell+
363 :			THEN >r ;
364 :
365 :	anton	1.65	(-do) ( nlimit nstart -- R:nlimit R:nstart ) gforth paren_minus_do
366 :	anton	1.1	if (nstart <= nlimit) {
367 :	anton	1.64	IF_spTOS(spTOS = sp[0]);
368 :	anton	1.1	goto branch;
369 :			}
370 :			else {
371 :			INC_IP(1);
372 :			}
373 :			:
374 :			swap 2dup
375 :			r> swap >r swap >r
376 :			<=
377 :			IF
378 :			dup @ +
379 :			ELSE
380 :			cell+
381 :			THEN >r ;
382 :
383 :	anton	1.65	(u-do) ( ulimit ustart -- R:ulimit R:ustart ) gforth paren_u_minus_do
384 :	anton	1.1	if (ustart <= ulimit) {
385 :	anton	1.64	IF_spTOS(spTOS = sp[0]);
386 :	anton	1.1	goto branch;
387 :			}
388 :			else {
389 :			INC_IP(1);
390 :			}
391 :			:
392 :			swap 2dup
393 :			r> swap >r swap >r
394 :			u<=
395 :			IF
396 :			dup @ +
397 :			ELSE
398 :			cell+
399 :			THEN >r ;
400 :
401 :	pazsan	1.15	\+
402 :	anton	1.1
403 :	jwilke	1.5	\ don't make any assumptions where the return stack is!!
404 :			\ implement this in machine code if it should run quickly!
405 :
406 :	anton	1.65	i ( R:n -- R:n n ) core
407 :	anton	1.1	:
408 :	jwilke	1.5	\ rp@ cell+ @ ;
409 :			r> r> tuck >r >r ;
410 :	anton	1.1
411 :	anton	1.65	i' ( R:w R:w2 -- R:w R:w2 w ) gforth i_tick
412 :	anton	1.1	:
413 :	jwilke	1.5	\ rp@ cell+ cell+ @ ;
414 :			r> r> r> dup itmp ! >r >r >r itmp @ ;
415 :			variable itmp
416 :	anton	1.1
417 :	anton	1.65	j ( R:n R:d1 -- n R:n R:d1 ) core
418 :	anton	1.1	:
419 :	jwilke	1.5	\ rp@ cell+ cell+ cell+ @ ;
420 :			r> r> r> r> dup itmp ! >r >r >r >r itmp @ ;
421 :			[IFUNDEF] itmp variable itmp [THEN]
422 :	anton	1.1
423 :	anton	1.65	k ( R:n R:d1 R:d2 -- n R:n R:d1 R:d2 ) gforth
424 :	anton	1.1	:
425 :	jwilke	1.5	\ rp@ [ 5 cells ] Literal + @ ;
426 :			r> r> r> r> r> r> dup itmp ! >r >r >r >r >r >r itmp @ ;
427 :			[IFUNDEF] itmp variable itmp [THEN]
428 :	jwilke	1.31
429 :			\f[THEN]
430 :	anton	1.1
431 :			\ digit is high-level: 0/0%
432 :
433 :	anton	1.47	move ( c_from c_to ucount -- ) core
434 :	anton	1.52	""Copy the contents of @i{ucount} aus at @i{c-from} to
435 :	anton	1.33	@i{c-to}. @code{move} works correctly even if the two areas overlap.""
436 :	anton	1.52	/* !! note that the standard specifies addr, not c-addr */
437 :	anton	1.1	memmove(c_to,c_from,ucount);
438 :			/* make an Ifdef for bsd and others? */
439 :			:
440 :			>r 2dup u< IF r> cmove> ELSE r> cmove THEN ;
441 :
442 :	anton	1.47	cmove ( c_from c_to u -- ) string c_move
443 :	anton	1.33	""Copy the contents of @i{ucount} characters from data space at
444 :			@i{c-from} to @i{c-to}. The copy proceeds @code{char}-by-@code{char}
445 :			from low address to high address; i.e., for overlapping areas it is
446 :			safe if @i{c-to}=<@i{c-from}.""
447 :	anton	1.1	while (u-- > 0)
448 :			c_to++ = c_from++;
449 :			:
450 :			bounds ?DO dup c@ I c! 1+ LOOP drop ;
451 :
452 :	anton	1.47	cmove> ( c_from c_to u -- ) string c_move_up
453 :	anton	1.33	""Copy the contents of @i{ucount} characters from data space at
454 :			@i{c-from} to @i{c-to}. The copy proceeds @code{char}-by-@code{char}
455 :			from high address to low address; i.e., for overlapping areas it is
456 :			safe if @i{c-to}>=@i{c-from}.""
457 :	anton	1.1	while (u-- > 0)
458 :			c_to[u] = c_from[u];
459 :			:
460 :			dup 0= IF drop 2drop exit THEN
461 :			rot over + -rot bounds swap 1-
462 :			DO 1- dup c@ I c! -1 +LOOP drop ;
463 :
464 :	anton	1.47	fill ( c_addr u c -- ) core
465 :	anton	1.52	""Store @i{c} in @i{u} chars starting at @i{c-addr}.""
466 :	anton	1.1	memset(c_addr,c,u);
467 :			:
468 :			-rot bounds
469 :			?DO dup I c! LOOP drop ;
470 :
471 :	anton	1.47	compare ( c_addr1 u1 c_addr2 u2 -- n ) string
472 :	crook	1.29	""Compare two strings lexicographically. If they are equal, @i{n} is 0; if
473 :			the first string is smaller, @i{n} is -1; if the first string is larger, @i{n}
474 :	anton	1.1	is 1. Currently this is based on the machine's character
475 :	crook	1.26	comparison. In the future, this may change to consider the current
476 :	anton	1.1	locale and its collation order.""
477 :	pazsan	1.46	/* close ' to keep fontify happy */
478 :	anton	1.1	n = memcmp(c_addr1, c_addr2, u1<u2 ? u1 : u2);
479 :			if (n==0)
480 :			n = u1-u2;
481 :			if (n<0)
482 :			n = -1;
483 :			else if (n>0)
484 :			n = 1;
485 :			:
486 :	pazsan	1.43	rot 2dup swap - >r min swap -text dup
487 :			IF rdrop ELSE drop r> sgn THEN ;
488 :			: sgn ( n -- -1/0/1 )
489 :			dup 0= IF EXIT THEN 0< 2* 1+ ;
490 :	anton	1.1
491 :	anton	1.47	-text ( c_addr1 u c_addr2 -- n ) new dash_text
492 :	anton	1.1	n = memcmp(c_addr1, c_addr2, u);
493 :			if (n<0)
494 :			n = -1;
495 :			else if (n>0)
496 :			n = 1;
497 :			:
498 :			swap bounds
499 :			?DO dup c@ I c@ = WHILE 1+ LOOP drop 0
500 :	pazsan	1.49	ELSE c@ I c@ - unloop THEN sgn ;
501 :	pazsan	1.43	: sgn ( n -- -1/0/1 )
502 :			dup 0= IF EXIT THEN 0< 2* 1+ ;
503 :	anton	1.1
504 :	anton	1.47	toupper ( c1 -- c2 ) gforth
505 :	crook	1.29	""If @i{c1} is a lower-case character (in the current locale), @i{c2}
506 :	anton	1.25	is the equivalent upper-case character. All other characters are unchanged.""
507 :	anton	1.1	c2 = toupper(c1);
508 :			:
509 :			dup [char] a - [ char z char a - 1 + ] Literal u< bl and - ;
510 :
511 :	anton	1.47	capscomp ( c_addr1 u c_addr2 -- n ) new
512 :	anton	1.1	n = memcasecmp(c_addr1, c_addr2, u); /* !! use something that works in all locales */
513 :			if (n<0)
514 :			n = -1;
515 :			else if (n>0)
516 :			n = 1;
517 :			:
518 :			swap bounds
519 :			?DO dup c@ I c@ <>
520 :			IF dup c@ toupper I c@ toupper =
521 :			ELSE true THEN WHILE 1+ LOOP drop 0
522 :	pazsan	1.49	ELSE c@ toupper I c@ toupper - unloop THEN sgn ;
523 :	anton	1.1
524 :	anton	1.47	-trailing ( c_addr u1 -- c_addr u2 ) string dash_trailing
525 :	crook	1.29	""Adjust the string specified by @i{c-addr, u1} to remove all trailing
526 :			spaces. @i{u2} is the length of the modified string.""
527 :	anton	1.1	u2 = u1;
528 :	anton	1.4	while (u2>0 && c_addr[u2-1] == ' ')
529 :	anton	1.1	u2--;
530 :			:
531 :			BEGIN 1- 2dup + c@ bl = WHILE
532 :			dup 0= UNTIL ELSE 1+ THEN ;
533 :
534 :	anton	1.47	/string ( c_addr1 u1 n -- c_addr2 u2 ) string slash_string
535 :	crook	1.29	""Adjust the string specified by @i{c-addr1, u1} to remove @i{n}
536 :	crook	1.27	characters from the start of the string.""
537 :	anton	1.1	c_addr2 = c_addr1+n;
538 :			u2 = u1-n;
539 :			:
540 :			tuck - >r + r> dup 0< IF - 0 THEN ;
541 :
542 :	anton	1.47	+ ( n1 n2 -- n ) core plus
543 :	anton	1.1	n = n1+n2;
544 :
545 :			\ PFE-0.9.14 has it differently, but the next release will have it as follows
546 :	anton	1.47	under+ ( n1 n2 n3 -- n n2 ) gforth under_plus
547 :	crook	1.29	""add @i{n3} to @i{n1} (giving @i{n})""
548 :	anton	1.1	n = n1+n3;
549 :			:
550 :			rot + swap ;
551 :
552 :	anton	1.47	- ( n1 n2 -- n ) core minus
553 :	anton	1.1	n = n1-n2;
554 :			:
555 :			negate + ;
556 :
557 :	anton	1.47	negate ( n1 -- n2 ) core
558 :	anton	1.1	/* use minus as alias */
559 :			n2 = -n1;
560 :			:
561 :			invert 1+ ;
562 :
563 :	anton	1.47	1+ ( n1 -- n2 ) core one_plus
564 :	anton	1.1	n2 = n1+1;
565 :			:
566 :			1 + ;
567 :
568 :	anton	1.47	1- ( n1 -- n2 ) core one_minus
569 :	anton	1.1	n2 = n1-1;
570 :			:
571 :			1 - ;
572 :
573 :	anton	1.47	max ( n1 n2 -- n ) core
574 :	anton	1.1	if (n1<n2)
575 :			n = n2;
576 :			else
577 :			n = n1;
578 :			:
579 :			2dup < IF swap THEN drop ;
580 :
581 :	anton	1.47	min ( n1 n2 -- n ) core
582 :	anton	1.1	if (n1<n2)
583 :			n = n1;
584 :			else
585 :			n = n2;
586 :			:
587 :			2dup > IF swap THEN drop ;
588 :
589 :	anton	1.52	abs ( n -- u ) core
590 :			if (n<0)
591 :			u = -n;
592 :	anton	1.1	else
593 :	anton	1.52	u = n;
594 :	anton	1.1	:
595 :			dup 0< IF negate THEN ;
596 :
597 :	anton	1.47	* ( n1 n2 -- n ) core star
598 :	anton	1.1	n = n1*n2;
599 :			:
600 :			um* drop ;
601 :
602 :	anton	1.47	/ ( n1 n2 -- n ) core slash
603 :	anton	1.1	n = n1/n2;
604 :			:
605 :			/mod nip ;
606 :
607 :	anton	1.47	mod ( n1 n2 -- n ) core
608 :	anton	1.1	n = n1%n2;
609 :			:
610 :			/mod drop ;
611 :
612 :	anton	1.47	/mod ( n1 n2 -- n3 n4 ) core slash_mod
613 :	anton	1.1	n4 = n1/n2;
614 :			n3 = n1%n2; /* !! is this correct? look into C standard! */
615 :			:
616 :			>r s>d r> fm/mod ;
617 :
618 :	anton	1.47	2* ( n1 -- n2 ) core two_star
619 :	anton	1.52	""Shift left by 1; also works on unsigned numbers""
620 :	anton	1.1	n2 = 2*n1;
621 :			:
622 :			dup + ;
623 :
624 :	anton	1.47	2/ ( n1 -- n2 ) core two_slash
625 :	anton	1.52	""Arithmetic shift right by 1. For signed numbers this is a floored
626 :			division by 2 (note that @code{/} not necessarily floors).""
627 :	anton	1.1	n2 = n1>>1;
628 :			:
629 :			dup MINI and IF 1 ELSE 0 THEN
630 :			[ bits/byte cell * 1- ] literal
631 :	jwilke	1.5	0 DO 2* swap dup 2* >r MINI and
632 :	anton	1.1	IF 1 ELSE 0 THEN or r> swap
633 :			LOOP nip ;
634 :
635 :	anton	1.47	fm/mod ( d1 n1 -- n2 n3 ) core f_m_slash_mod
636 :	crook	1.29	""Floored division: @i{d1} = @i{n3}*@i{n1}+@i{n2}, @i{n1}>@i{n2}>=0 or 0>=@i{n2}>@i{n1}.""
637 :	anton	1.1	#ifdef BUGGY_LONG_LONG
638 :			DCell r = fmdiv(d1,n1);
639 :			n2=r.hi;
640 :			n3=r.lo;
641 :			#else
642 :			/* assumes that the processor uses either floored or symmetric division */
643 :			n3 = d1/n1;
644 :			n2 = d1%n1;
645 :			/* note that this 1%-3>0 is optimized by the compiler */
646 :			if (1%-3>0 && (d1<0) != (n1<0) && n2!=0) {
647 :			n3--;
648 :			n2+=n1;
649 :			}
650 :			#endif
651 :			:
652 :			dup >r dup 0< IF negate >r dnegate r> THEN
653 :			over 0< IF tuck + swap THEN
654 :			um/mod
655 :			r> 0< IF swap negate swap THEN ;
656 :
657 :	anton	1.47	sm/rem ( d1 n1 -- n2 n3 ) core s_m_slash_rem
658 :	crook	1.29	""Symmetric division: @i{d1} = @i{n3}*@i{n1}+@i{n2}, sign(@i{n2})=sign(@i{d1}) or 0.""
659 :	anton	1.1	#ifdef BUGGY_LONG_LONG
660 :			DCell r = smdiv(d1,n1);
661 :			n2=r.hi;
662 :			n3=r.lo;
663 :			#else
664 :			/* assumes that the processor uses either floored or symmetric division */
665 :			n3 = d1/n1;
666 :			n2 = d1%n1;
667 :			/* note that this 1%-3<0 is optimized by the compiler */
668 :			if (1%-3<0 && (d1<0) != (n1<0) && n2!=0) {
669 :			n3++;
670 :			n2-=n1;
671 :			}
672 :			#endif
673 :			:
674 :			over >r dup >r abs -rot
675 :			dabs rot um/mod
676 :			r> r@ xor 0< IF negate THEN
677 :			r> 0< IF swap negate swap THEN ;
678 :
679 :	anton	1.47	m* ( n1 n2 -- d ) core m_star
680 :	anton	1.1	#ifdef BUGGY_LONG_LONG
681 :			d = mmul(n1,n2);
682 :			#else
683 :			d = (DCell)n1 * (DCell)n2;
684 :			#endif
685 :			:
686 :			2dup 0< and >r
687 :			2dup swap 0< and >r
688 :			um* r> - r> - ;
689 :
690 :	anton	1.47	um* ( u1 u2 -- ud ) core u_m_star
691 :	anton	1.1	/* use u* as alias */
692 :			#ifdef BUGGY_LONG_LONG
693 :			ud = ummul(u1,u2);
694 :			#else
695 :			ud = (UDCell)u1 * (UDCell)u2;
696 :			#endif
697 :			:
698 :			>r >r 0 0 r> r> [ 8 cells ] literal 0
699 :			DO
700 :			over >r dup >r 0< and d2*+ drop
701 :			r> 2* r> swap
702 :			LOOP 2drop ;
703 :			: d2*+ ( ud n -- ud+n c )
704 :			over MINI
705 :			and >r >r 2dup d+ swap r> + swap r> ;
706 :
707 :	anton	1.47	um/mod ( ud u1 -- u2 u3 ) core u_m_slash_mod
708 :	anton	1.32	""ud=u3*u1+u2, u1>u2>=0""
709 :	anton	1.1	#ifdef BUGGY_LONG_LONG
710 :			UDCell r = umdiv(ud,u1);
711 :			u2=r.hi;
712 :			u3=r.lo;
713 :			#else
714 :			u3 = ud/u1;
715 :			u2 = ud%u1;
716 :			#endif
717 :			:
718 :			0 swap [ 8 cells 1 + ] literal 0
719 :	jwilke	1.5	?DO /modstep
720 :	anton	1.1	LOOP drop swap 1 rshift or swap ;
721 :			: /modstep ( ud c R: u -- ud-?u c R: u )
722 :	jwilke	1.5	>r over r@ u< 0= or IF r@ - 1 ELSE 0 THEN d2*+ r> ;
723 :	anton	1.1	: d2*+ ( ud n -- ud+n c )
724 :			over MINI
725 :			and >r >r 2dup d+ swap r> + swap r> ;
726 :
727 :	anton	1.47	m+ ( d1 n -- d2 ) double m_plus
728 :	anton	1.1	#ifdef BUGGY_LONG_LONG
729 :			d2.lo = d1.lo+n;
730 :			d2.hi = d1.hi - (n<0) + (d2.lo<d1.lo);
731 :			#else
732 :			d2 = d1+n;
733 :			#endif
734 :			:
735 :			s>d d+ ;
736 :
737 :	anton	1.47	d+ ( d1 d2 -- d ) double d_plus
738 :	anton	1.1	#ifdef BUGGY_LONG_LONG
739 :			d.lo = d1.lo+d2.lo;
740 :			d.hi = d1.hi + d2.hi + (d.lo<d1.lo);
741 :			#else
742 :			d = d1+d2;
743 :			#endif
744 :			:
745 :			rot + >r tuck + swap over u> r> swap - ;
746 :
747 :	anton	1.47	d- ( d1 d2 -- d ) double d_minus
748 :	anton	1.1	#ifdef BUGGY_LONG_LONG
749 :			d.lo = d1.lo - d2.lo;
750 :			d.hi = d1.hi-d2.hi-(d1.lo<d2.lo);
751 :			#else
752 :			d = d1-d2;
753 :			#endif
754 :			:
755 :			dnegate d+ ;
756 :
757 :	anton	1.47	dnegate ( d1 -- d2 ) double d_negate
758 :	anton	1.1	/* use dminus as alias */
759 :			#ifdef BUGGY_LONG_LONG
760 :			d2 = dnegate(d1);
761 :			#else
762 :			d2 = -d1;
763 :			#endif
764 :			:
765 :			invert swap negate tuck 0= - ;
766 :
767 :	anton	1.47	d2* ( d1 -- d2 ) double d_two_star
768 :	anton	1.52	""Shift left by 1; also works on unsigned numbers""
769 :	anton	1.1	#ifdef BUGGY_LONG_LONG
770 :			d2.lo = d1.lo<<1;
771 :			d2.hi = (d1.hi<<1) \| (d1.lo>>(CELL_BITS-1));
772 :			#else
773 :			d2 = 2*d1;
774 :			#endif
775 :			:
776 :			2dup d+ ;
777 :
778 :	anton	1.47	d2/ ( d1 -- d2 ) double d_two_slash
779 :	anton	1.52	""Arithmetic shift right by 1. For signed numbers this is a floored
780 :			division by 2.""
781 :	anton	1.1	#ifdef BUGGY_LONG_LONG
782 :			d2.hi = d1.hi>>1;
783 :			d2.lo= (d1.lo>>1) \| (d1.hi<<(CELL_BITS-1));
784 :			#else
785 :			d2 = d1>>1;
786 :			#endif
787 :			:
788 :			dup 1 and >r 2/ swap 2/ [ 1 8 cells 1- lshift 1- ] Literal and
789 :			r> IF [ 1 8 cells 1- lshift ] Literal + THEN swap ;
790 :
791 :	anton	1.47	and ( w1 w2 -- w ) core
792 :	anton	1.1	w = w1&w2;
793 :
794 :	anton	1.47	or ( w1 w2 -- w ) core
795 :	anton	1.1	w = w1\|w2;
796 :			:
797 :			invert swap invert and invert ;
798 :
799 :	anton	1.47	xor ( w1 w2 -- w ) core x_or
800 :	anton	1.1	w = w1^w2;
801 :
802 :	anton	1.47	invert ( w1 -- w2 ) core
803 :	anton	1.1	w2 = ~w1;
804 :			:
805 :			MAXU xor ;
806 :
807 :	anton	1.47	rshift ( u1 n -- u2 ) core r_shift
808 :	anton	1.53	""Logical shift right by @i{n} bits.""
809 :	anton	1.1	u2 = u1>>n;
810 :			:
811 :			0 ?DO 2/ MAXI and LOOP ;
812 :
813 :	anton	1.47	lshift ( u1 n -- u2 ) core l_shift
814 :	anton	1.1	u2 = u1<<n;
815 :			:
816 :			0 ?DO 2* LOOP ;
817 :
818 :			\ comparisons(prefix, args, prefix, arg1, arg2, wordsets...)
819 :			define(comparisons,
820 :	anton	1.47	$1= ( $2 -- f ) $6 $3equals
821 :	anton	1.1	f = FLAG($4==$5);
822 :			:
823 :			[ char $1x char 0 = [IF]
824 :			] IF false ELSE true THEN [
825 :			[ELSE]
826 :			] xor 0= [
827 :			[THEN] ] ;
828 :
829 :	anton	1.47	$1<> ( $2 -- f ) $7 $3not_equals
830 :	anton	1.1	f = FLAG($4!=$5);
831 :			:
832 :			[ char $1x char 0 = [IF]
833 :			] IF true ELSE false THEN [
834 :			[ELSE]
835 :			] xor 0<> [
836 :			[THEN] ] ;
837 :
838 :	anton	1.47	$1< ( $2 -- f ) $8 $3less_than
839 :	anton	1.1	f = FLAG($4<$5);
840 :			:
841 :			[ char $1x char 0 = [IF]
842 :			] MINI and 0<> [
843 :			[ELSE] char $1x char u = [IF]
844 :			] 2dup xor 0< IF nip ELSE - THEN 0< [
845 :			[ELSE]
846 :			] MINI xor >r MINI xor r> u< [
847 :			[THEN]
848 :			[THEN] ] ;
849 :
850 :	anton	1.47	$1> ( $2 -- f ) $9 $3greater_than
851 :	anton	1.1	f = FLAG($4>$5);
852 :			:
853 :			[ char $1x char 0 = [IF] ] negate [ [ELSE] ] swap [ [THEN] ]
854 :			$1< ;
855 :
856 :	anton	1.47	$1<= ( $2 -- f ) gforth $3less_or_equal
857 :	anton	1.1	f = FLAG($4<=$5);
858 :			:
859 :			$1> 0= ;
860 :
861 :	anton	1.47	$1>= ( $2 -- f ) gforth $3greater_or_equal
862 :	anton	1.1	f = FLAG($4>=$5);
863 :			:
864 :			[ char $1x char 0 = [IF] ] negate [ [ELSE] ] swap [ [THEN] ]
865 :			$1<= ;
866 :
867 :			)
868 :
869 :			comparisons(0, n, zero_, n, 0, core, core-ext, core, core-ext)
870 :			comparisons(, n1 n2, , n1, n2, core, core-ext, core, core)
871 :			comparisons(u, u1 u2, u_, u1, u2, gforth, gforth, core, core-ext)
872 :
873 :			\ dcomparisons(prefix, args, prefix, arg1, arg2, wordsets...)
874 :			define(dcomparisons,
875 :	anton	1.47	$1= ( $2 -- f ) $6 $3equals
876 :	anton	1.1	#ifdef BUGGY_LONG_LONG
877 :			f = FLAG($4.lo==$5.lo && $4.hi==$5.hi);
878 :			#else
879 :			f = FLAG($4==$5);
880 :			#endif
881 :
882 :	anton	1.47	$1<> ( $2 -- f ) $7 $3not_equals
883 :	anton	1.1	#ifdef BUGGY_LONG_LONG
884 :			f = FLAG($4.lo!=$5.lo \|\| $4.hi!=$5.hi);
885 :			#else
886 :			f = FLAG($4!=$5);
887 :			#endif
888 :
889 :	anton	1.47	$1< ( $2 -- f ) $8 $3less_than
890 :	anton	1.1	#ifdef BUGGY_LONG_LONG
891 :			f = FLAG($4.hi==$5.hi ? $4.lo<$5.lo : $4.hi<$5.hi);
892 :			#else
893 :			f = FLAG($4<$5);
894 :			#endif
895 :
896 :	anton	1.47	$1> ( $2 -- f ) $9 $3greater_than
897 :	anton	1.1	#ifdef BUGGY_LONG_LONG
898 :			f = FLAG($4.hi==$5.hi ? $4.lo>$5.lo : $4.hi>$5.hi);
899 :			#else
900 :			f = FLAG($4>$5);
901 :			#endif
902 :
903 :	anton	1.47	$1<= ( $2 -- f ) gforth $3less_or_equal
904 :	anton	1.1	#ifdef BUGGY_LONG_LONG
905 :			f = FLAG($4.hi==$5.hi ? $4.lo<=$5.lo : $4.hi<=$5.hi);
906 :			#else
907 :			f = FLAG($4<=$5);
908 :			#endif
909 :
910 :	anton	1.47	$1>= ( $2 -- f ) gforth $3greater_or_equal
911 :	anton	1.1	#ifdef BUGGY_LONG_LONG
912 :			f = FLAG($4.hi==$5.hi ? $4.lo>=$5.lo : $4.hi>=$5.hi);
913 :			#else
914 :			f = FLAG($4>=$5);
915 :			#endif
916 :
917 :			)
918 :
919 :	pazsan	1.15	\+dcomps
920 :	anton	1.1
921 :			dcomparisons(d, d1 d2, d_, d1, d2, double, gforth, double, gforth)
922 :			dcomparisons(d0, d, d_zero_, d, DZERO, double, gforth, double, gforth)
923 :			dcomparisons(du, ud1 ud2, d_u_, ud1, ud2, gforth, gforth, double-ext, gforth)
924 :
925 :	pazsan	1.15	\+
926 :	anton	1.1
927 :	anton	1.47	within ( u1 u2 u3 -- f ) core-ext
928 :	anton	1.32	""u2=<u1<u3 or: u3=<u2 and u1 is not in [u3,u2). This works for
929 :			unsigned and signed numbers (but not a mixture). Another way to think
930 :			about this word is to consider the numbers as a circle (wrapping
931 :			around from @code{max-u} to 0 for unsigned, and from @code{max-n} to
932 :			min-n for signed numbers); now consider the range from u2 towards
933 :			increasing numbers up to and excluding u3 (giving an empty range if
934 :	anton	1.52	u2=u3); if u1 is in this range, @code{within} returns true.""
935 :	anton	1.1	f = FLAG(u1-u2 < u3-u2);
936 :			:
937 :			over - >r - r> u< ;
938 :
939 :	anton	1.47	sp@ ( -- a_addr ) gforth sp_fetch
940 :	anton	1.1	a_addr = sp+1;
941 :
942 :	anton	1.47	sp! ( a_addr -- ) gforth sp_store
943 :	anton	1.1	sp = a_addr;
944 :	anton	1.64	/* works with and without spTOS caching */
945 :	anton	1.1
946 :	anton	1.47	rp@ ( -- a_addr ) gforth rp_fetch
947 :	anton	1.1	a_addr = rp;
948 :
949 :	anton	1.47	rp! ( a_addr -- ) gforth rp_store
950 :	anton	1.1	rp = a_addr;
951 :
952 :	pazsan	1.15	\+floating
953 :	anton	1.1
954 :	anton	1.47	fp@ ( -- f_addr ) gforth fp_fetch
955 :	anton	1.1	f_addr = fp;
956 :
957 :	anton	1.47	fp! ( f_addr -- ) gforth fp_store
958 :	anton	1.1	fp = f_addr;
959 :
960 :	pazsan	1.15	\+
961 :	anton	1.1
962 :	anton	1.65	;s ( R:w -- ) gforth semis
963 :	crook	1.22	""The primitive compiled by @code{EXIT}.""
964 :	anton	1.65	SET_IP((Xt *)w);
965 :	anton	1.1
966 :	anton	1.65	>r ( w -- R:w ) core to_r
967 :	anton	1.1	:
968 :			(>r) ;
969 :			: (>r) rp@ cell+ @ rp@ ! rp@ cell+ ! ;
970 :
971 :	anton	1.65	r> ( R:w -- w ) core r_from
972 :	anton	1.1	:
973 :			rp@ cell+ @ rp@ @ rp@ cell+ ! (rdrop) rp@ ! ;
974 :			Create (rdrop) ' ;s A,
975 :
976 :	anton	1.65	rdrop ( R:w -- ) gforth
977 :	anton	1.1	:
978 :			r> r> drop >r ;
979 :
980 :	anton	1.65	2>r ( w1 w2 -- R:w1 R:w2 ) core-ext two_to_r
981 :	anton	1.1	:
982 :			swap r> swap >r swap >r >r ;
983 :
984 :	anton	1.65	2r> ( R:w1 R:w2 -- w1 w2 ) core-ext two_r_from
985 :	anton	1.1	:
986 :			r> r> swap r> swap >r swap ;
987 :
988 :	anton	1.65	2r@ ( R:w1 R:w2 -- R:w1 R:w2 w1 w2 ) core-ext two_r_fetch
989 :	anton	1.1	:
990 :			i' j ;
991 :
992 :	anton	1.65	2rdrop ( R:w1 R:w2 -- ) gforth two_r_drop
993 :	anton	1.1	:
994 :			r> r> drop r> drop >r ;
995 :
996 :	anton	1.47	over ( w1 w2 -- w1 w2 w1 ) core
997 :	anton	1.1	:
998 :			sp@ cell+ @ ;
999 :
1000 :	anton	1.47	drop ( w -- ) core
1001 :	anton	1.1	:
1002 :			IF THEN ;
1003 :
1004 :	anton	1.47	swap ( w1 w2 -- w2 w1 ) core
1005 :	anton	1.1	:
1006 :			>r (swap) ! r> (swap) @ ;
1007 :			Variable (swap)
1008 :
1009 :	anton	1.47	dup ( w -- w w ) core dupe
1010 :	anton	1.1	:
1011 :			sp@ @ ;
1012 :
1013 :	anton	1.47	rot ( w1 w2 w3 -- w2 w3 w1 ) core rote
1014 :	anton	1.1	:
1015 :			[ defined? (swap) [IF] ]
1016 :			(swap) ! (rot) ! >r (rot) @ (swap) @ r> ;
1017 :			Variable (rot)
1018 :			[ELSE] ]
1019 :			>r swap r> swap ;
1020 :			[THEN]
1021 :
1022 :	anton	1.47	-rot ( w1 w2 w3 -- w3 w1 w2 ) gforth not_rote
1023 :	anton	1.1	:
1024 :			rot rot ;
1025 :
1026 :	anton	1.47	nip ( w1 w2 -- w2 ) core-ext
1027 :	anton	1.1	:
1028 :	jwilke	1.6	swap drop ;
1029 :	anton	1.1
1030 :	anton	1.47	tuck ( w1 w2 -- w2 w1 w2 ) core-ext
1031 :	anton	1.1	:
1032 :			swap over ;
1033 :
1034 :	anton	1.47	?dup ( w -- w ) core question_dupe
1035 :	anton	1.52	""Actually the stack effect is: @code{( w -- 0 \| w w )}. It performs a
1036 :			@code{dup} if w is nonzero.""
1037 :	anton	1.1	if (w!=0) {
1038 :	anton	1.64	IF_spTOS(*sp-- = w;)
1039 :	anton	1.1	#ifndef USE_TOS
1040 :			*--sp = w;
1041 :			#endif
1042 :			}
1043 :			:
1044 :			dup IF dup THEN ;
1045 :
1046 :	anton	1.47	pick ( u -- w ) core-ext
1047 :	anton	1.52	""Actually the stack effect is @code{ x0 ... xu u -- x0 ... xu x0 }.""
1048 :	anton	1.1	w = sp[u+1];
1049 :			:
1050 :			1+ cells sp@ + @ ;
1051 :
1052 :	anton	1.47	2drop ( w1 w2 -- ) core two_drop
1053 :	anton	1.1	:
1054 :			drop drop ;
1055 :
1056 :	anton	1.47	2dup ( w1 w2 -- w1 w2 w1 w2 ) core two_dupe
1057 :	anton	1.1	:
1058 :			over over ;
1059 :
1060 :	anton	1.47	2over ( w1 w2 w3 w4 -- w1 w2 w3 w4 w1 w2 ) core two_over
1061 :	anton	1.1	:
1062 :			3 pick 3 pick ;
1063 :
1064 :	anton	1.47	2swap ( w1 w2 w3 w4 -- w3 w4 w1 w2 ) core two_swap
1065 :	anton	1.1	:
1066 :			rot >r rot r> ;
1067 :
1068 :	anton	1.47	2rot ( w1 w2 w3 w4 w5 w6 -- w3 w4 w5 w6 w1 w2 ) double-ext two_rote
1069 :	anton	1.1	:
1070 :			>r >r 2swap r> r> 2swap ;
1071 :
1072 :	anton	1.47	2nip ( w1 w2 w3 w4 -- w3 w4 ) gforth two_nip
1073 :	anton	1.1	:
1074 :			2swap 2drop ;
1075 :
1076 :	anton	1.47	2tuck ( w1 w2 w3 w4 -- w3 w4 w1 w2 w3 w4 ) gforth two_tuck
1077 :	anton	1.1	:
1078 :			2swap 2over ;
1079 :
1080 :			\ toggle is high-level: 0.11/0.42%
1081 :
1082 :	anton	1.47	@ ( a_addr -- w ) core fetch
1083 :	anton	1.52	""@i{w} is the cell stored at @i{a_addr}.""
1084 :	anton	1.1	w = *a_addr;
1085 :
1086 :	anton	1.47	! ( w a_addr -- ) core store
1087 :	anton	1.52	""Store @i{w} into the cell at @i{a-addr}.""
1088 :	anton	1.1	*a_addr = w;
1089 :
1090 :	anton	1.47	+! ( n a_addr -- ) core plus_store
1091 :	anton	1.52	""Add @i{n} to the cell at @i{a-addr}.""
1092 :	anton	1.1	*a_addr += n;
1093 :			:
1094 :			tuck @ + swap ! ;
1095 :
1096 :	anton	1.47	c@ ( c_addr -- c ) core c_fetch
1097 :	anton	1.52	""@i{c} is the char stored at @i{c_addr}.""
1098 :	anton	1.1	c = *c_addr;
1099 :			:
1100 :			[ bigendian [IF] ]
1101 :			[ cell>bit 4 = [IF] ]
1102 :			dup [ 0 cell - ] Literal and @ swap 1 and
1103 :			IF $FF and ELSE 8>> THEN ;
1104 :			[ [ELSE] ]
1105 :			dup [ cell 1- ] literal and
1106 :			tuck - @ swap [ cell 1- ] literal xor
1107 :			0 ?DO 8>> LOOP $FF and
1108 :			[ [THEN] ]
1109 :			[ [ELSE] ]
1110 :			[ cell>bit 4 = [IF] ]
1111 :			dup [ 0 cell - ] Literal and @ swap 1 and
1112 :			IF 8>> ELSE $FF and THEN
1113 :			[ [ELSE] ]
1114 :			dup [ cell 1- ] literal and
1115 :			tuck - @ swap
1116 :			0 ?DO 8>> LOOP 255 and
1117 :			[ [THEN] ]
1118 :			[ [THEN] ]
1119 :			;
1120 :			: 8>> 2/ 2/ 2/ 2/ 2/ 2/ 2/ 2/ ;
1121 :
1122 :	anton	1.47	c! ( c c_addr -- ) core c_store
1123 :	anton	1.52	""Store @i{c} into the char at @i{c-addr}.""
1124 :	anton	1.1	*c_addr = c;
1125 :			:
1126 :			[ bigendian [IF] ]
1127 :			[ cell>bit 4 = [IF] ]
1128 :			tuck 1 and IF $FF and ELSE 8<< THEN >r
1129 :			dup -2 and @ over 1 and cells masks + @ and
1130 :			r> or swap -2 and ! ;
1131 :			Create masks $00FF , $FF00 ,
1132 :			[ELSE] ]
1133 :			dup [ cell 1- ] literal and dup
1134 :			[ cell 1- ] literal xor >r
1135 :			- dup @ $FF r@ 0 ?DO 8<< LOOP invert and
1136 :			rot $FF and r> 0 ?DO 8<< LOOP or swap ! ;
1137 :			[THEN]
1138 :			[ELSE] ]
1139 :			[ cell>bit 4 = [IF] ]
1140 :			tuck 1 and IF 8<< ELSE $FF and THEN >r
1141 :			dup -2 and @ over 1 and cells masks + @ and
1142 :			r> or swap -2 and ! ;
1143 :			Create masks $FF00 , $00FF ,
1144 :			[ELSE] ]
1145 :			dup [ cell 1- ] literal and dup >r
1146 :			- dup @ $FF r@ 0 ?DO 8<< LOOP invert and
1147 :			rot $FF and r> 0 ?DO 8<< LOOP or swap ! ;
1148 :			[THEN]
1149 :			[THEN]
1150 :			: 8<< 2* 2* 2* 2* 2* 2* 2* 2* ;
1151 :
1152 :	anton	1.47	2! ( w1 w2 a_addr -- ) core two_store
1153 :	anton	1.52	""Store @i{w2} into the cell at @i{c-addr} and @i{w1} into the next cell.""
1154 :	anton	1.1	a_addr[0] = w2;
1155 :			a_addr[1] = w1;
1156 :			:
1157 :			tuck ! cell+ ! ;
1158 :
1159 :	anton	1.47	2@ ( a_addr -- w1 w2 ) core two_fetch
1160 :	anton	1.52	""@i{w2} is the content of the cell stored at @i{a-addr}, @i{w1} is
1161 :			the content of the next cell.""
1162 :	anton	1.1	w2 = a_addr[0];
1163 :			w1 = a_addr[1];
1164 :			:
1165 :			dup cell+ @ swap @ ;
1166 :
1167 :	anton	1.47	cell+ ( a_addr1 -- a_addr2 ) core cell_plus
1168 :	anton	1.52	""@code{1 cells +}""
1169 :	anton	1.1	a_addr2 = a_addr1+1;
1170 :			:
1171 :			cell + ;
1172 :
1173 :	anton	1.47	cells ( n1 -- n2 ) core
1174 :	anton	1.52	"" @i{n2} is the number of address units of @i{n1} cells.""
1175 :	anton	1.1	n2 = n1 * sizeof(Cell);
1176 :			:
1177 :			[ cell
1178 :			2/ dup [IF] ] 2* [ [THEN]
1179 :			2/ dup [IF] ] 2* [ [THEN]
1180 :			2/ dup [IF] ] 2* [ [THEN]
1181 :			2/ dup [IF] ] 2* [ [THEN]
1182 :			drop ] ;
1183 :
1184 :	anton	1.47	char+ ( c_addr1 -- c_addr2 ) core char_plus
1185 :	anton	1.52	""@code{1 chars +}.""
1186 :	anton	1.1	c_addr2 = c_addr1 + 1;
1187 :			:
1188 :			1+ ;
1189 :
1190 :	anton	1.47	(chars) ( n1 -- n2 ) gforth paren_chars
1191 :	anton	1.1	n2 = n1 * sizeof(Char);
1192 :			:
1193 :			;
1194 :
1195 :	anton	1.47	count ( c_addr1 -- c_addr2 u ) core
1196 :	anton	1.56	""@i{c-addr2} is the first character and @i{u} the length of the
1197 :			counted string at @i{c-addr1}.""
1198 :	anton	1.1	u = *c_addr1;
1199 :			c_addr2 = c_addr1+1;
1200 :			:
1201 :			dup 1+ swap c@ ;
1202 :
1203 :	anton	1.47	(f83find) ( c_addr u f83name1 -- f83name2 ) new paren_f83find
1204 :	pazsan	1.13	for (; f83name1 != NULL; f83name1 = (struct F83Name *)(f83name1->next))
1205 :	anton	1.1	if ((UCell)F83NAME_COUNT(f83name1)==u &&
1206 :			memcasecmp(c_addr, f83name1->name, u)== 0 /* or inline? */)
1207 :			break;
1208 :			f83name2=f83name1;
1209 :			:
1210 :			BEGIN dup WHILE (find-samelen) dup WHILE
1211 :			>r 2dup r@ cell+ char+ capscomp 0=
1212 :			IF 2drop r> EXIT THEN
1213 :			r> @
1214 :			REPEAT THEN nip nip ;
1215 :			: (find-samelen) ( u f83name1 -- u f83name2/0 )
1216 :			BEGIN 2dup cell+ c@ $1F and <> WHILE @ dup 0= UNTIL THEN ;
1217 :
1218 :	pazsan	1.15	\+hash
1219 :	anton	1.1
1220 :	anton	1.47	(hashfind) ( c_addr u a_addr -- f83name2 ) new paren_hashfind
1221 :	pazsan	1.13	struct F83Name *f83name1;
1222 :	anton	1.1	f83name2=NULL;
1223 :			while(a_addr != NULL)
1224 :			{
1225 :	pazsan	1.13	f83name1=(struct F83Name *)(a_addr[1]);
1226 :	anton	1.1	a_addr=(Cell *)(a_addr[0]);
1227 :			if ((UCell)F83NAME_COUNT(f83name1)==u &&
1228 :			memcasecmp(c_addr, f83name1->name, u)== 0 /* or inline? */)
1229 :			{
1230 :			f83name2=f83name1;
1231 :			break;
1232 :			}
1233 :			}
1234 :			:
1235 :			BEGIN dup WHILE
1236 :			2@ >r >r dup r@ cell+ c@ $1F and =
1237 :			IF 2dup r@ cell+ char+ capscomp 0=
1238 :			IF 2drop r> rdrop EXIT THEN THEN
1239 :			rdrop r>
1240 :			REPEAT nip nip ;
1241 :
1242 :	anton	1.47	(tablefind) ( c_addr u a_addr -- f83name2 ) new paren_tablefind
1243 :	anton	1.1	""A case-sensitive variant of @code{(hashfind)}""
1244 :	pazsan	1.13	struct F83Name *f83name1;
1245 :	anton	1.1	f83name2=NULL;
1246 :			while(a_addr != NULL)
1247 :			{
1248 :	pazsan	1.13	f83name1=(struct F83Name *)(a_addr[1]);
1249 :	anton	1.1	a_addr=(Cell *)(a_addr[0]);
1250 :			if ((UCell)F83NAME_COUNT(f83name1)==u &&
1251 :			memcmp(c_addr, f83name1->name, u)== 0 /* or inline? */)
1252 :			{
1253 :			f83name2=f83name1;
1254 :			break;
1255 :			}
1256 :			}
1257 :			:
1258 :			BEGIN dup WHILE
1259 :			2@ >r >r dup r@ cell+ c@ $1F and =
1260 :			IF 2dup r@ cell+ char+ -text 0=
1261 :			IF 2drop r> rdrop EXIT THEN THEN
1262 :			rdrop r>
1263 :			REPEAT nip nip ;
1264 :
1265 :	anton	1.47	(hashkey) ( c_addr u1 -- u2 ) gforth paren_hashkey
1266 :	anton	1.1	u2=0;
1267 :			while(u1--)
1268 :			u2+=(Cell)toupper(*c_addr++);
1269 :			:
1270 :			0 -rot bounds ?DO I c@ toupper + LOOP ;
1271 :
1272 :	anton	1.47	(hashkey1) ( c_addr u ubits -- ukey ) gforth paren_hashkey1
1273 :	anton	1.1	""ukey is the hash key for the string c_addr u fitting in ubits bits""
1274 :			/* this hash function rotates the key at every step by rot bits within
1275 :			ubits bits and xors it with the character. This function does ok in
1276 :			the chi-sqare-test. Rot should be <=7 (preferably <=5) for
1277 :			ASCII strings (larger if ubits is large), and should share no
1278 :			divisors with ubits.
1279 :			*/
1280 :			unsigned rot = ((char []){5,0,1,2,3,4,5,5,5,5,3,5,5,5,5,7,5,5,5,5,7,5,5,5,5,6,5,5,5,5,7,5,5})[ubits];
1281 :			Char *cp = c_addr;
1282 :			for (ukey=0; cp<c_addr+u; cp++)
1283 :			ukey = ((((ukey<<rot) \| (ukey>>(ubits-rot)))
1284 :			^ toupper(*cp))
1285 :			& ((1<<ubits)-1));
1286 :			:
1287 :			dup rot-values + c@ over 1 swap lshift 1- >r
1288 :			tuck - 2swap r> 0 2swap bounds
1289 :			?DO dup 4 pick lshift swap 3 pick rshift or
1290 :			I c@ toupper xor
1291 :			over and LOOP
1292 :			nip nip nip ;
1293 :			Create rot-values
1294 :			5 c, 0 c, 1 c, 2 c, 3 c, 4 c, 5 c, 5 c, 5 c, 5 c,
1295 :			3 c, 5 c, 5 c, 5 c, 5 c, 7 c, 5 c, 5 c, 5 c, 5 c,
1296 :			7 c, 5 c, 5 c, 5 c, 5 c, 6 c, 5 c, 5 c, 5 c, 5 c,
1297 :			7 c, 5 c, 5 c,
1298 :
1299 :	pazsan	1.15	\+
1300 :	anton	1.1
1301 :	anton	1.47	(parse-white) ( c_addr1 u1 -- c_addr2 u2 ) gforth paren_parse_white
1302 :	anton	1.1	/* use !isgraph instead of isspace? */
1303 :			Char *endp = c_addr1+u1;
1304 :			while (c_addr1<endp && isspace(*c_addr1))
1305 :			c_addr1++;
1306 :			if (c_addr1<endp) {
1307 :			for (c_addr2 = c_addr1; c_addr1<endp && !isspace(*c_addr1); c_addr1++)
1308 :			;
1309 :			u2 = c_addr1-c_addr2;
1310 :			}
1311 :			else {
1312 :			c_addr2 = c_addr1;
1313 :			u2 = 0;
1314 :			}
1315 :			:
1316 :			BEGIN dup WHILE over c@ bl <= WHILE 1 /string
1317 :			REPEAT THEN 2dup
1318 :			BEGIN dup WHILE over c@ bl > WHILE 1 /string
1319 :			REPEAT THEN nip - ;
1320 :
1321 :	anton	1.47	aligned ( c_addr -- a_addr ) core
1322 :	crook	1.29	"" @i{a-addr} is the first aligned address greater than or equal to @i{c-addr}.""
1323 :	anton	1.1	a_addr = (Cell *)((((Cell)c_addr)+(sizeof(Cell)-1))&(-sizeof(Cell)));
1324 :			:
1325 :			[ cell 1- ] Literal + [ -1 cells ] Literal and ;
1326 :
1327 :	anton	1.47	faligned ( c_addr -- f_addr ) float f_aligned
1328 :	crook	1.29	"" @i{f-addr} is the first float-aligned address greater than or equal to @i{c-addr}.""
1329 :	anton	1.1	f_addr = (Float *)((((Cell)c_addr)+(sizeof(Float)-1))&(-sizeof(Float)));
1330 :			:
1331 :			[ 1 floats 1- ] Literal + [ -1 floats ] Literal and ;
1332 :
1333 :	anton	1.47	>body ( xt -- a_addr ) core to_body
1334 :	crook	1.40	"" Get the address of the body of the word represented by @i{xt} (the address
1335 :			of the word's data field).""
1336 :	anton	1.1	a_addr = PFA(xt);
1337 :			:
1338 :			2 cells + ;
1339 :
1340 :	jwilke	1.35	\ threading stuff is currently only interesting if we have a compiler
1341 :			\fhas? standardthreading has? compiler and [IF]
1342 :	jwilke	1.28
1343 :	anton	1.47	>code-address ( xt -- c_addr ) gforth to_code_address
1344 :	crook	1.29	""@i{c-addr} is the code address of the word @i{xt}.""
1345 :	anton	1.1	/* !! This behaves installation-dependently for DOES-words */
1346 :			c_addr = (Address)CODE_ADDRESS(xt);
1347 :			:
1348 :			@ ;
1349 :
1350 :	anton	1.47	>does-code ( xt -- a_addr ) gforth to_does_code
1351 :	anton	1.58	""If @i{xt} is the execution token of a child of a @code{DOES>} word,
1352 :	crook	1.29	@i{a-addr} is the start of the Forth code after the @code{DOES>};
1353 :			Otherwise @i{a-addr} is 0.""
1354 :	anton	1.1	a_addr = (Cell *)DOES_CODE(xt);
1355 :			:
1356 :			cell+ @ ;
1357 :
1358 :	anton	1.47	code-address! ( c_addr xt -- ) gforth code_address_store
1359 :	crook	1.29	""Create a code field with code address @i{c-addr} at @i{xt}.""
1360 :	anton	1.1	MAKE_CF(xt, c_addr);
1361 :	anton	1.10	CACHE_FLUSH(xt,(size_t)PFA(0));
1362 :	anton	1.1	:
1363 :			! ;
1364 :
1365 :	anton	1.47	does-code! ( a_addr xt -- ) gforth does_code_store
1366 :	anton	1.58	""Create a code field at @i{xt} for a child of a @code{DOES>}-word;
1367 :			@i{a-addr} is the start of the Forth code after @code{DOES>}.""
1368 :	anton	1.1	MAKE_DOES_CF(xt, a_addr);
1369 :	anton	1.10	CACHE_FLUSH(xt,(size_t)PFA(0));
1370 :	anton	1.1	:
1371 :			dodoes: over ! cell+ ! ;
1372 :
1373 :	anton	1.47	does-handler! ( a_addr -- ) gforth does_handler_store
1374 :	anton	1.58	""Create a @code{DOES>}-handler at address @i{a-addr}. Normally,
1375 :			@i{a-addr} points just behind a @code{DOES>}.""
1376 :	anton	1.1	MAKE_DOES_HANDLER(a_addr);
1377 :	anton	1.10	CACHE_FLUSH((caddr_t)a_addr,DOES_HANDLER_SIZE);
1378 :	anton	1.1	:
1379 :			drop ;
1380 :
1381 :	anton	1.47	/does-handler ( -- n ) gforth slash_does_handler
1382 :	crook	1.26	""The size of a @code{DOES>}-handler (includes possible padding).""
1383 :	anton	1.1	/* !! a constant or environmental query might be better */
1384 :			n = DOES_HANDLER_SIZE;
1385 :			:
1386 :			2 cells ;
1387 :
1388 :	anton	1.47	threading-method ( -- n ) gforth threading_method
1389 :	anton	1.1	""0 if the engine is direct threaded. Note that this may change during
1390 :			the lifetime of an image.""
1391 :			#if defined(DOUBLY_INDIRECT)
1392 :			n=2;
1393 :			#else
1394 :			# if defined(DIRECT_THREADED)
1395 :			n=0;
1396 :			# else
1397 :			n=1;
1398 :			# endif
1399 :			#endif
1400 :			:
1401 :			1 ;
1402 :	jwilke	1.28
1403 :	jwilke	1.35	\f[THEN]
1404 :	anton	1.1
1405 :	anton	1.47	key-file ( wfileid -- n ) gforth paren_key_file
1406 :	pazsan	1.17	#ifdef HAS_FILE
1407 :	anton	1.1	fflush(stdout);
1408 :	pazsan	1.12	n = key((FILE*)wfileid);
1409 :	pazsan	1.17	#else
1410 :			n = key(stdin);
1411 :			#endif
1412 :	anton	1.1
1413 :	anton	1.47	key?-file ( wfileid -- n ) facility key_q_file
1414 :	pazsan	1.17	#ifdef HAS_FILE
1415 :	anton	1.1	fflush(stdout);
1416 :	pazsan	1.12	n = key_query((FILE*)wfileid);
1417 :	pazsan	1.17	#else
1418 :			n = key_query(stdin);
1419 :			#endif
1420 :
1421 :			\+os
1422 :	pazsan	1.12
1423 :	anton	1.47	stdin ( -- wfileid ) gforth
1424 :	pazsan	1.12	wfileid = (Cell)stdin;
1425 :	anton	1.1
1426 :	anton	1.47	stdout ( -- wfileid ) gforth
1427 :	anton	1.1	wfileid = (Cell)stdout;
1428 :
1429 :	anton	1.47	stderr ( -- wfileid ) gforth
1430 :	anton	1.1	wfileid = (Cell)stderr;
1431 :
1432 :	anton	1.47	form ( -- urows ucols ) gforth
1433 :	anton	1.1	""The number of lines and columns in the terminal. These numbers may change
1434 :			with the window size.""
1435 :			/* we could block SIGWINCH here to get a consistent size, but I don't
1436 :			think this is necessary or always beneficial */
1437 :			urows=rows;
1438 :			ucols=cols;
1439 :
1440 :	anton	1.47	flush-icache ( c_addr u -- ) gforth flush_icache
1441 :	anton	1.1	""Make sure that the instruction cache of the processor (if there is
1442 :	crook	1.29	one) does not contain stale data at @i{c-addr} and @i{u} bytes
1443 :	anton	1.1	afterwards. @code{END-CODE} performs a @code{flush-icache}
1444 :			automatically. Caveat: @code{flush-icache} might not work on your
1445 :			installation; this is usually the case if direct threading is not
1446 :			supported on your machine (take a look at your @file{machine.h}) and
1447 :			your machine has a separate instruction cache. In such cases,
1448 :			@code{flush-icache} does nothing instead of flushing the instruction
1449 :			cache.""
1450 :			FLUSH_ICACHE(c_addr,u);
1451 :
1452 :	anton	1.47	(bye) ( n -- ) gforth paren_bye
1453 :	anton	1.1	return (Label *)n;
1454 :
1455 :	anton	1.47	(system) ( c_addr u -- wretval wior ) gforth peren_system
1456 :	pazsan	1.20	#ifndef MSDOS
1457 :	anton	1.1	int old_tp=terminal_prepped;
1458 :			deprep_terminal();
1459 :	pazsan	1.20	#endif
1460 :	anton	1.1	wretval=system(cstr(c_addr,u,1)); /* ~ expansion on first part of string? */
1461 :			wior = IOR(wretval==-1 \|\| (wretval==127 && errno != 0));
1462 :	pazsan	1.20	#ifndef MSDOS
1463 :	anton	1.1	if (old_tp)
1464 :			prep_terminal();
1465 :	pazsan	1.20	#endif
1466 :	anton	1.1
1467 :	anton	1.47	getenv ( c_addr1 u1 -- c_addr2 u2 ) gforth
1468 :	crook	1.29	""The string @i{c-addr1 u1} specifies an environment variable. The string @i{c-addr2 u2}
1469 :	crook	1.24	is the host operating system's expansion of that environment variable. If the
1470 :	crook	1.29	environment variable does not exist, @i{c-addr2 u2} specifies a string 0 characters
1471 :	crook	1.24	in length.""
1472 :	pazsan	1.46	/* close ' to keep fontify happy */
1473 :	anton	1.1	c_addr2 = getenv(cstr(c_addr1,u1,1));
1474 :			u2 = (c_addr2 == NULL ? 0 : strlen(c_addr2));
1475 :
1476 :	anton	1.56	open-pipe ( c_addr u wfam -- wfileid wior ) gforth open_pipe
1477 :			wfileid=(Cell)popen(cstr(c_addr,u,1),fileattr[wfam]); /* ~ expansion of 1st arg? */
1478 :	anton	1.1	wior = IOR(wfileid==0); /* !! the man page says that errno is not set reliably */
1479 :
1480 :	anton	1.47	close-pipe ( wfileid -- wretval wior ) gforth close_pipe
1481 :	anton	1.1	wretval = pclose((FILE *)wfileid);
1482 :			wior = IOR(wretval==-1);
1483 :
1484 :	anton	1.47	time&date ( -- nsec nmin nhour nday nmonth nyear ) facility-ext time_and_date
1485 :	crook	1.44	""Report the current time of day. Seconds, minutes and hours are numbered from 0.
1486 :			Months are numbered from 1.""
1487 :	anton	1.1	struct timeval time1;
1488 :			struct timezone zone1;
1489 :			struct tm *ltime;
1490 :			gettimeofday(&time1,&zone1);
1491 :	anton	1.51	/* !! Single Unix specification:
1492 :			If tzp is not a null pointer, the behaviour is unspecified. */
1493 :	anton	1.1	ltime=localtime((time_t *)&time1.tv_sec);
1494 :			nyear =ltime->tm_year+1900;
1495 :			nmonth=ltime->tm_mon+1;
1496 :			nday =ltime->tm_mday;
1497 :			nhour =ltime->tm_hour;
1498 :			nmin =ltime->tm_min;
1499 :			nsec =ltime->tm_sec;
1500 :
1501 :	anton	1.47	ms ( n -- ) facility-ext
1502 :	crook	1.44	""Wait at least @i{n} milli-second.""
1503 :	anton	1.1	struct timeval timeout;
1504 :			timeout.tv_sec=n/1000;
1505 :			timeout.tv_usec=1000*(n%1000);
1506 :			(void)select(0,0,0,0,&timeout);
1507 :
1508 :	anton	1.47	allocate ( u -- a_addr wior ) memory
1509 :	crook	1.29	""Allocate @i{u} address units of contiguous data space. The initial
1510 :	crook	1.27	contents of the data space is undefined. If the allocation is successful,
1511 :	crook	1.29	@i{a-addr} is the start address of the allocated region and @i{wior}
1512 :			is 0. If the allocation fails, @i{a-addr} is undefined and @i{wior}
1513 :	anton	1.52	is a non-zero I/O result code.""
1514 :	anton	1.1	a_addr = (Cell *)malloc(u?u:1);
1515 :			wior = IOR(a_addr==NULL);
1516 :
1517 :	anton	1.47	free ( a_addr -- wior ) memory
1518 :	crook	1.29	""Return the region of data space starting at @i{a-addr} to the system.
1519 :	anton	1.52	The region must originally have been obtained using @code{allocate} or
1520 :	crook	1.29	@code{resize}. If the operational is successful, @i{wior} is 0.
1521 :	anton	1.52	If the operation fails, @i{wior} is a non-zero I/O result code.""
1522 :	anton	1.1	free(a_addr);
1523 :			wior = 0;
1524 :
1525 :	anton	1.47	resize ( a_addr1 u -- a_addr2 wior ) memory
1526 :	crook	1.26	""Change the size of the allocated area at @i{a-addr1} to @i{u}
1527 :	anton	1.1	address units, possibly moving the contents to a different
1528 :	crook	1.27	area. @i{a-addr2} is the address of the resulting area.
1529 :	anton	1.52	If the operation is successful, @i{wior} is 0.
1530 :			If the operation fails, @i{wior} is a non-zero
1531 :	crook	1.29	I/O result code. If @i{a-addr1} is 0, Gforth's (but not the Standard)
1532 :	crook	1.27	@code{resize} @code{allocate}s @i{u} address units.""
1533 :	anton	1.1	/* the following check is not necessary on most OSs, but it is needed
1534 :			on SunOS 4.1.2. */
1535 :	pazsan	1.46	/* close ' to keep fontify happy */
1536 :	anton	1.1	if (a_addr1==NULL)
1537 :			a_addr2 = (Cell *)malloc(u);
1538 :			else
1539 :			a_addr2 = (Cell *)realloc(a_addr1, u);
1540 :			wior = IOR(a_addr2==NULL); /* !! Define a return code */
1541 :
1542 :	anton	1.47	strerror ( n -- c_addr u ) gforth
1543 :	anton	1.1	c_addr = strerror(n);
1544 :			u = strlen(c_addr);
1545 :
1546 :	anton	1.47	strsignal ( n -- c_addr u ) gforth
1547 :	anton	1.1	c_addr = strsignal(n);
1548 :			u = strlen(c_addr);
1549 :
1550 :	anton	1.47	call-c ( w -- ) gforth call_c
1551 :	anton	1.1	""Call the C function pointed to by @i{w}. The C function has to
1552 :			access the stack itself. The stack pointers are exported in the global
1553 :			variables @code{SP} and @code{FP}.""
1554 :			/* This is a first attempt at support for calls to C. This may change in
1555 :			the future */
1556 :	anton	1.64	IF_fpTOS(fp[0]=fpTOS);
1557 :	anton	1.1	FP=fp;
1558 :			SP=sp;
1559 :			((void (*)())w)();
1560 :			sp=SP;
1561 :			fp=FP;
1562 :	anton	1.64	IF_spTOS(spTOS=sp[0]);
1563 :			IF_fpTOS(fpTOS=fp[0]);
1564 :	anton	1.1
1565 :	pazsan	1.15	\+
1566 :			\+file
1567 :	anton	1.1
1568 :	anton	1.47	close-file ( wfileid -- wior ) file close_file
1569 :	anton	1.1	wior = IOR(fclose((FILE *)wfileid)==EOF);
1570 :
1571 :	anton	1.56	open-file ( c_addr u wfam -- wfileid wior ) file open_file
1572 :			wfileid = (Cell)fopen(tilde_cstr(c_addr, u, 1), fileattr[wfam]);
1573 :	crook	1.22	wior = IOR(wfileid == 0);
1574 :	anton	1.1
1575 :	anton	1.56	create-file ( c_addr u wfam -- wfileid wior ) file create_file
1576 :	anton	1.1	Cell fd;
1577 :	anton	1.56	fd = open(tilde_cstr(c_addr, u, 1), O_CREAT\|O_TRUNC\|ufileattr[wfam], 0666);
1578 :	anton	1.1	if (fd != -1) {
1579 :	anton	1.56	wfileid = (Cell)fdopen(fd, fileattr[wfam]);
1580 :	crook	1.22	wior = IOR(wfileid == 0);
1581 :	anton	1.1	} else {
1582 :	crook	1.22	wfileid = 0;
1583 :	anton	1.1	wior = IOR(1);
1584 :			}
1585 :
1586 :	anton	1.47	delete-file ( c_addr u -- wior ) file delete_file
1587 :	anton	1.1	wior = IOR(unlink(tilde_cstr(c_addr, u, 1))==-1);
1588 :
1589 :	anton	1.47	rename-file ( c_addr1 u1 c_addr2 u2 -- wior ) file-ext rename_file
1590 :	crook	1.29	""Rename file @i{c_addr1 u1} to new name @i{c_addr2 u2}""
1591 :	anton	1.1	char *s1=tilde_cstr(c_addr2, u2, 1);
1592 :			wior = IOR(rename(tilde_cstr(c_addr1, u1, 0), s1)==-1);
1593 :
1594 :	anton	1.47	file-position ( wfileid -- ud wior ) file file_position
1595 :	anton	1.1	/* !! use tell and lseek? */
1596 :			ud = LONG2UD(ftell((FILE *)wfileid));
1597 :			wior = IOR(UD2LONG(ud)==-1);
1598 :
1599 :	anton	1.47	reposition-file ( ud wfileid -- wior ) file reposition_file
1600 :	anton	1.1	wior = IOR(fseek((FILE *)wfileid, UD2LONG(ud), SEEK_SET)==-1);
1601 :
1602 :	anton	1.47	file-size ( wfileid -- ud wior ) file file_size
1603 :	anton	1.1	struct stat buf;
1604 :			wior = IOR(fstat(fileno((FILE *)wfileid), &buf)==-1);
1605 :			ud = LONG2UD(buf.st_size);
1606 :
1607 :	anton	1.47	resize-file ( ud wfileid -- wior ) file resize_file
1608 :	anton	1.1	wior = IOR(ftruncate(fileno((FILE *)wfileid), UD2LONG(ud))==-1);
1609 :
1610 :	anton	1.47	read-file ( c_addr u1 wfileid -- u2 wior ) file read_file
1611 :	anton	1.1	/* !! fread does not guarantee enough */
1612 :			u2 = fread(c_addr, sizeof(Char), u1, (FILE *)wfileid);
1613 :			wior = FILEIO(u2<u1 && ferror((FILE *)wfileid));
1614 :			/* !! is the value of ferror errno-compatible? */
1615 :			if (wior)
1616 :			clearerr((FILE *)wfileid);
1617 :
1618 :	pazsan	1.60	read-line ( c_addr u1 wfileid -- u2 flag wior ) file read_line
1619 :			""this is only for backward compatibility""
1620 :	anton	1.1	Cell c;
1621 :			flag=-1;
1622 :			for(u2=0; u2<u1; u2++)
1623 :			{
1624 :	anton	1.45	c = getc((FILE *)wfileid);
1625 :			if (c=='\n') break;
1626 :			if (c=='\r') {
1627 :			if ((c = getc((FILE *)wfileid))!='\n')
1628 :			ungetc(c,(FILE *)wfileid);
1629 :			break;
1630 :			}
1631 :			if (c==EOF) {
1632 :	anton	1.1	flag=FLAG(u2!=0);
1633 :			break;
1634 :			}
1635 :	anton	1.45	c_addr[u2] = (Char)c;
1636 :	anton	1.1	}
1637 :			wior=FILEIO(ferror((FILE *)wfileid));
1638 :
1639 :	pazsan	1.15	\+
1640 :	anton	1.1
1641 :	anton	1.47	write-file ( c_addr u1 wfileid -- wior ) file write_file
1642 :	anton	1.1	/* !! fwrite does not guarantee enough */
1643 :	pazsan	1.39	#ifdef HAS_FILE
1644 :	anton	1.1	{
1645 :			UCell u2 = fwrite(c_addr, sizeof(Char), u1, (FILE *)wfileid);
1646 :			wior = FILEIO(u2<u1 && ferror((FILE *)wfileid));
1647 :			if (wior)
1648 :			clearerr((FILE *)wfileid);
1649 :			}
1650 :	pazsan	1.39	#else
1651 :			TYPE(c_addr, u1);
1652 :			#endif
1653 :	pazsan	1.17
1654 :	anton	1.47	emit-file ( c wfileid -- wior ) gforth emit_file
1655 :	pazsan	1.17	#ifdef HAS_FILE
1656 :	anton	1.1	wior = FILEIO(putc(c, (FILE *)wfileid)==EOF);
1657 :			if (wior)
1658 :			clearerr((FILE *)wfileid);
1659 :	pazsan	1.17	#else
1660 :	pazsan	1.36	PUTC(c);
1661 :	pazsan	1.17	#endif
1662 :	anton	1.1
1663 :	pazsan	1.15	\+file
1664 :	anton	1.1
1665 :	anton	1.47	flush-file ( wfileid -- wior ) file-ext flush_file
1666 :	anton	1.1	wior = IOR(fflush((FILE *) wfileid)==EOF);
1667 :
1668 :	anton	1.56	file-status ( c_addr u -- wfam wior ) file-ext file_status
1669 :	anton	1.1	char *filename=tilde_cstr(c_addr, u, 1);
1670 :			if (access (filename, F_OK) != 0) {
1671 :	anton	1.56	wfam=0;
1672 :	anton	1.1	wior=IOR(1);
1673 :			}
1674 :			else if (access (filename, R_OK \| W_OK) == 0) {
1675 :	anton	1.56	wfam=2; /* r/w */
1676 :	anton	1.1	wior=0;
1677 :			}
1678 :			else if (access (filename, R_OK) == 0) {
1679 :	anton	1.56	wfam=0; /* r/o */
1680 :	anton	1.1	wior=0;
1681 :			}
1682 :			else if (access (filename, W_OK) == 0) {
1683 :	anton	1.56	wfam=4; /* w/o */
1684 :	anton	1.1	wior=0;
1685 :			}
1686 :			else {
1687 :	anton	1.56	wfam=1; /* well, we cannot access the file, but better deliver a legal
1688 :	anton	1.1	access mode (r/o bin), so we get a decent error later upon open. */
1689 :			wior=0;
1690 :			}
1691 :
1692 :	pazsan	1.15	\+
1693 :			\+floating
1694 :	anton	1.1
1695 :			comparisons(f, r1 r2, f_, r1, r2, gforth, gforth, float, gforth)
1696 :			comparisons(f0, r, f_zero_, r, 0., float, gforth, float, gforth)
1697 :
1698 :	anton	1.47	d>f ( d -- r ) float d_to_f
1699 :	anton	1.1	#ifdef BUGGY_LONG_LONG
1700 :			extern double ldexp(double x, int exp);
1701 :			r = ldexp((Float)d.hi,CELL_BITS) + (Float)d.lo;
1702 :			#else
1703 :			r = d;
1704 :			#endif
1705 :
1706 :	anton	1.47	f>d ( r -- d ) float f_to_d
1707 :	anton	1.1	#ifdef BUGGY_LONG_LONG
1708 :	anton	1.21	d.hi = ldexp(r,-(int)(CELL_BITS)) - (r<0);
1709 :	anton	1.1	d.lo = r-ldexp((Float)d.hi,CELL_BITS);
1710 :			#else
1711 :			d = r;
1712 :			#endif
1713 :
1714 :	anton	1.47	f! ( r f_addr -- ) float f_store
1715 :	anton	1.52	""Store @i{r} into the float at address @i{f-addr}.""
1716 :	anton	1.1	*f_addr = r;
1717 :
1718 :	anton	1.47	f@ ( f_addr -- r ) float f_fetch
1719 :	anton	1.52	""@i{r} is the float at address @i{f-addr}.""
1720 :	anton	1.1	r = *f_addr;
1721 :
1722 :	anton	1.47	df@ ( df_addr -- r ) float-ext d_f_fetch
1723 :	anton	1.52	""Fetch the double-precision IEEE floating-point value @i{r} from the address @i{df-addr}.""
1724 :	anton	1.1	#ifdef IEEE_FP
1725 :			r = *df_addr;
1726 :			#else
1727 :			!! df@
1728 :			#endif
1729 :
1730 :	anton	1.47	df! ( r df_addr -- ) float-ext d_f_store
1731 :	anton	1.52	""Store @i{r} as double-precision IEEE floating-point value to the
1732 :			address @i{df-addr}.""
1733 :	anton	1.1	#ifdef IEEE_FP
1734 :			*df_addr = r;
1735 :			#else
1736 :			!! df!
1737 :			#endif
1738 :
1739 :	anton	1.47	sf@ ( sf_addr -- r ) float-ext s_f_fetch
1740 :	anton	1.52	""Fetch the single-precision IEEE floating-point value @i{r} from the address @i{sf-addr}.""
1741 :	anton	1.1	#ifdef IEEE_FP
1742 :			r = *sf_addr;
1743 :			#else
1744 :			!! sf@
1745 :			#endif
1746 :
1747 :	anton	1.47	sf! ( r sf_addr -- ) float-ext s_f_store
1748 :	anton	1.52	""Store @i{r} as single-precision IEEE floating-point value to the
1749 :			address @i{sf-addr}.""
1750 :	anton	1.1	#ifdef IEEE_FP
1751 :			*sf_addr = r;
1752 :			#else
1753 :			!! sf!
1754 :			#endif
1755 :
1756 :	anton	1.47	f+ ( r1 r2 -- r3 ) float f_plus
1757 :	anton	1.1	r3 = r1+r2;
1758 :
1759 :	anton	1.47	f- ( r1 r2 -- r3 ) float f_minus
1760 :	anton	1.1	r3 = r1-r2;
1761 :
1762 :	anton	1.47	f* ( r1 r2 -- r3 ) float f_star
1763 :	anton	1.1	r3 = r1*r2;
1764 :
1765 :	anton	1.47	f/ ( r1 r2 -- r3 ) float f_slash
1766 :	anton	1.1	r3 = r1/r2;
1767 :
1768 :	anton	1.47	f** ( r1 r2 -- r3 ) float-ext f_star_star
1769 :	crook	1.26	""@i{r3} is @i{r1} raised to the @i{r2}th power.""
1770 :	anton	1.1	r3 = pow(r1,r2);
1771 :
1772 :	anton	1.47	fnegate ( r1 -- r2 ) float f_negate
1773 :	anton	1.1	r2 = - r1;
1774 :
1775 :	anton	1.47	fdrop ( r -- ) float f_drop
1776 :	anton	1.1
1777 :	anton	1.47	fdup ( r -- r r ) float f_dupe
1778 :	anton	1.1
1779 :	anton	1.47	fswap ( r1 r2 -- r2 r1 ) float f_swap
1780 :	anton	1.1
1781 :	anton	1.47	fover ( r1 r2 -- r1 r2 r1 ) float f_over
1782 :	anton	1.1
1783 :	anton	1.47	frot ( r1 r2 r3 -- r2 r3 r1 ) float f_rote
1784 :	anton	1.1
1785 :	anton	1.47	fnip ( r1 r2 -- r2 ) gforth f_nip
1786 :	anton	1.1
1787 :	anton	1.47	ftuck ( r1 r2 -- r2 r1 r2 ) gforth f_tuck
1788 :	anton	1.1
1789 :	anton	1.47	float+ ( f_addr1 -- f_addr2 ) float float_plus
1790 :	anton	1.52	""@code{1 floats +}.""
1791 :	anton	1.1	f_addr2 = f_addr1+1;
1792 :
1793 :	anton	1.47	floats ( n1 -- n2 ) float
1794 :	anton	1.52	""@i{n2} is the number of address units of @i{n1} floats.""
1795 :	anton	1.1	n2 = n1*sizeof(Float);
1796 :
1797 :	anton	1.47	floor ( r1 -- r2 ) float
1798 :	crook	1.26	""Round towards the next smaller integral value, i.e., round toward negative infinity.""
1799 :	anton	1.1	/* !! unclear wording */
1800 :			r2 = floor(r1);
1801 :
1802 :	anton	1.47	fround ( r1 -- r2 ) float f_round
1803 :	crook	1.26	""Round to the nearest integral value.""
1804 :	anton	1.1	/* !! unclear wording */
1805 :			#ifdef HAVE_RINT
1806 :			r2 = rint(r1);
1807 :			#else
1808 :			r2 = floor(r1+0.5);
1809 :			/* !! This is not quite true to the rounding rules given in the standard */
1810 :			#endif
1811 :
1812 :	anton	1.47	fmax ( r1 r2 -- r3 ) float f_max
1813 :	anton	1.1	if (r1<r2)
1814 :			r3 = r2;
1815 :			else
1816 :			r3 = r1;
1817 :
1818 :	anton	1.47	fmin ( r1 r2 -- r3 ) float f_min
1819 :	anton	1.1	if (r1<r2)
1820 :			r3 = r1;
1821 :			else
1822 :			r3 = r2;
1823 :
1824 :	anton	1.47	represent ( r c_addr u -- n f1 f2 ) float
1825 :	anton	1.1	char *sig;
1826 :			int flag;
1827 :			int decpt;
1828 :			sig=ecvt(r, u, &decpt, &flag);
1829 :			n=(r==0 ? 1 : decpt);
1830 :			f1=FLAG(flag!=0);
1831 :	anton	1.21	f2=FLAG(isdigit((unsigned)(sig[0]))!=0);
1832 :	anton	1.1	memmove(c_addr,sig,u);
1833 :
1834 :	anton	1.47	>float ( c_addr u -- flag ) float to_float
1835 :	anton	1.56	""Actual stack effect: ( c_addr u -- r t \| f ). Attempt to convert the
1836 :			character string @i{c-addr u} to internal floating-point
1837 :			representation. If the string represents a valid floating-point number
1838 :			@i{r} is placed on the floating-point stack and @i{flag} is
1839 :			true. Otherwise, @i{flag} is false. A string of blanks is a special
1840 :			case and represents the floating-point number 0.""
1841 :	anton	1.1	/* real signature: c_addr u -- r t / f */
1842 :			Float r;
1843 :			char *number=cstr(c_addr, u, 1);
1844 :			char *endconv;
1845 :	pazsan	1.42	int sign = 0;
1846 :			if(number[0]=='-') {
1847 :			sign = 1;
1848 :			number++;
1849 :			u--;
1850 :			}
1851 :	anton	1.21	while(isspace((unsigned)(number[--u])) && u>0);
1852 :	anton	1.1	switch(number[u])
1853 :			{
1854 :			case 'd':
1855 :			case 'D':
1856 :			case 'e':
1857 :			case 'E': break;
1858 :			default : u++; break;
1859 :			}
1860 :			number[u]='\0';
1861 :			r=strtod(number,&endconv);
1862 :			if((flag=FLAG(!(Cell)*endconv)))
1863 :			{
1864 :	anton	1.64	IF_fpTOS(fp[0] = fpTOS);
1865 :	anton	1.1	fp += -1;
1866 :	anton	1.64	fpTOS = sign ? -r : r;
1867 :	anton	1.1	}
1868 :			else if(endconv=='d' \|\| endconv=='D')
1869 :			{
1870 :			*endconv='E';
1871 :			r=strtod(number,&endconv);
1872 :			if((flag=FLAG(!(Cell)*endconv)))
1873 :			{
1874 :	anton	1.64	IF_fpTOS(fp[0] = fpTOS);
1875 :	anton	1.1	fp += -1;
1876 :	anton	1.64	fpTOS = sign ? -r : r;
1877 :	anton	1.1	}
1878 :			}
1879 :
1880 :	anton	1.47	fabs ( r1 -- r2 ) float-ext f_abs
1881 :	anton	1.1	r2 = fabs(r1);
1882 :
1883 :	anton	1.47	facos ( r1 -- r2 ) float-ext f_a_cos
1884 :	anton	1.1	r2 = acos(r1);
1885 :
1886 :	anton	1.47	fasin ( r1 -- r2 ) float-ext f_a_sine
1887 :	anton	1.1	r2 = asin(r1);
1888 :
1889 :	anton	1.47	fatan ( r1 -- r2 ) float-ext f_a_tan
1890 :	anton	1.1	r2 = atan(r1);
1891 :
1892 :	anton	1.47	fatan2 ( r1 r2 -- r3 ) float-ext f_a_tan_two
1893 :	crook	1.26	""@i{r1/r2}=tan(@i{r3}). ANS Forth does not require, but probably
1894 :	anton	1.1	intends this to be the inverse of @code{fsincos}. In gforth it is.""
1895 :			r3 = atan2(r1,r2);
1896 :
1897 :	anton	1.47	fcos ( r1 -- r2 ) float-ext f_cos
1898 :	anton	1.1	r2 = cos(r1);
1899 :
1900 :	anton	1.47	fexp ( r1 -- r2 ) float-ext f_e_x_p
1901 :	anton	1.1	r2 = exp(r1);
1902 :
1903 :	anton	1.47	fexpm1 ( r1 -- r2 ) float-ext f_e_x_p_m_one
1904 :	anton	1.1	""@i{r2}=@i{e}**@i{r1}@minus{}1""
1905 :			#ifdef HAVE_EXPM1
1906 :	pazsan	1.3	extern double
1907 :			#ifdef NeXT
1908 :			const
1909 :			#endif
1910 :			expm1(double);
1911 :	anton	1.1	r2 = expm1(r1);
1912 :			#else
1913 :			r2 = exp(r1)-1.;
1914 :			#endif
1915 :
1916 :	anton	1.47	fln ( r1 -- r2 ) float-ext f_l_n
1917 :	anton	1.1	r2 = log(r1);
1918 :
1919 :	anton	1.47	flnp1 ( r1 -- r2 ) float-ext f_l_n_p_one
1920 :	anton	1.1	""@i{r2}=ln(@i{r1}+1)""
1921 :			#ifdef HAVE_LOG1P
1922 :	pazsan	1.3	extern double
1923 :			#ifdef NeXT
1924 :			const
1925 :			#endif
1926 :			log1p(double);
1927 :	anton	1.1	r2 = log1p(r1);
1928 :			#else
1929 :			r2 = log(r1+1.);
1930 :			#endif
1931 :
1932 :	anton	1.47	flog ( r1 -- r2 ) float-ext f_log
1933 :	crook	1.26	""The decimal logarithm.""
1934 :	anton	1.1	r2 = log10(r1);
1935 :
1936 :	anton	1.47	falog ( r1 -- r2 ) float-ext f_a_log
1937 :	anton	1.1	""@i{r2}=10**@i{r1}""
1938 :			extern double pow10(double);
1939 :			r2 = pow10(r1);
1940 :
1941 :	anton	1.47	fsin ( r1 -- r2 ) float-ext f_sine
1942 :	anton	1.1	r2 = sin(r1);
1943 :
1944 :	anton	1.47	fsincos ( r1 -- r2 r3 ) float-ext f_sine_cos
1945 :	anton	1.1	""@i{r2}=sin(@i{r1}), @i{r3}=cos(@i{r1})""
1946 :			r2 = sin(r1);
1947 :			r3 = cos(r1);
1948 :
1949 :	anton	1.47	fsqrt ( r1 -- r2 ) float-ext f_square_root
1950 :	anton	1.1	r2 = sqrt(r1);
1951 :
1952 :	anton	1.47	ftan ( r1 -- r2 ) float-ext f_tan
1953 :	anton	1.1	r2 = tan(r1);
1954 :			:
1955 :			fsincos f/ ;
1956 :
1957 :	anton	1.47	fsinh ( r1 -- r2 ) float-ext f_cinch
1958 :	anton	1.1	r2 = sinh(r1);
1959 :			:
1960 :			fexpm1 fdup fdup 1. d>f f+ f/ f+ f2/ ;
1961 :
1962 :	anton	1.47	fcosh ( r1 -- r2 ) float-ext f_cosh
1963 :	anton	1.1	r2 = cosh(r1);
1964 :			:
1965 :			fexp fdup 1/f f+ f2/ ;
1966 :
1967 :	anton	1.47	ftanh ( r1 -- r2 ) float-ext f_tan_h
1968 :	anton	1.1	r2 = tanh(r1);
1969 :			:
1970 :			f2* fexpm1 fdup 2. d>f f+ f/ ;
1971 :
1972 :	anton	1.47	fasinh ( r1 -- r2 ) float-ext f_a_cinch
1973 :	anton	1.1	r2 = asinh(r1);
1974 :			:
1975 :			fdup fdup f* 1. d>f f+ fsqrt f/ fatanh ;
1976 :
1977 :	anton	1.47	facosh ( r1 -- r2 ) float-ext f_a_cosh
1978 :	anton	1.1	r2 = acosh(r1);
1979 :			:
1980 :			fdup fdup f* 1. d>f f- fsqrt f+ fln ;
1981 :
1982 :	anton	1.47	fatanh ( r1 -- r2 ) float-ext f_a_tan_h
1983 :	anton	1.1	r2 = atanh(r1);
1984 :			:
1985 :			fdup f0< >r fabs 1. d>f fover f- f/ f2* flnp1 f2/
1986 :			r> IF fnegate THEN ;
1987 :
1988 :	anton	1.47	sfloats ( n1 -- n2 ) float-ext s_floats
1989 :	anton	1.52	""@i{n2} is the number of address units of @i{n1}
1990 :	crook	1.29	single-precision IEEE floating-point numbers.""
1991 :	anton	1.1	n2 = n1*sizeof(SFloat);
1992 :
1993 :	anton	1.47	dfloats ( n1 -- n2 ) float-ext d_floats
1994 :	anton	1.52	""@i{n2} is the number of address units of @i{n1}
1995 :	crook	1.29	double-precision IEEE floating-point numbers.""
1996 :	anton	1.1	n2 = n1*sizeof(DFloat);
1997 :
1998 :	anton	1.47	sfaligned ( c_addr -- sf_addr ) float-ext s_f_aligned
1999 :	anton	1.52	""@i{sf-addr} is the first single-float-aligned address greater
2000 :	crook	1.29	than or equal to @i{c-addr}.""
2001 :	anton	1.1	sf_addr = (SFloat *)((((Cell)c_addr)+(sizeof(SFloat)-1))&(-sizeof(SFloat)));
2002 :			:
2003 :			[ 1 sfloats 1- ] Literal + [ -1 sfloats ] Literal and ;
2004 :
2005 :	anton	1.47	dfaligned ( c_addr -- df_addr ) float-ext d_f_aligned
2006 :	anton	1.52	""@i{df-addr} is the first double-float-aligned address greater
2007 :	crook	1.29	than or equal to @i{c-addr}.""
2008 :	anton	1.1	df_addr = (DFloat *)((((Cell)c_addr)+(sizeof(DFloat)-1))&(-sizeof(DFloat)));
2009 :			:
2010 :			[ 1 dfloats 1- ] Literal + [ -1 dfloats ] Literal and ;
2011 :
2012 :			\ The following words access machine/OS/installation-dependent
2013 :			\ Gforth internals
2014 :			\ !! how about environmental queries DIRECT-THREADED,
2015 :			\ INDIRECT-THREADED, TOS-CACHED, FTOS-CACHED, CODEFIELD-DOES */
2016 :
2017 :			\ local variable implementation primitives
2018 :	pazsan	1.15	\+
2019 :			\+glocals
2020 :	anton	1.1
2021 :	anton	1.47	@local# ( -- w ) gforth fetch_local_number
2022 :	anton	1.1	w = (Cell )(lp+(Cell)NEXT_INST);
2023 :			INC_IP(1);
2024 :
2025 :	anton	1.47	@local0 ( -- w ) new fetch_local_zero
2026 :	anton	1.1	w = (Cell )(lp+0*sizeof(Cell));
2027 :
2028 :	anton	1.47	@local1 ( -- w ) new fetch_local_four
2029 :	anton	1.1	w = (Cell )(lp+1*sizeof(Cell));
2030 :
2031 :	anton	1.47	@local2 ( -- w ) new fetch_local_eight
2032 :	anton	1.1	w = (Cell )(lp+2*sizeof(Cell));
2033 :
2034 :	anton	1.47	@local3 ( -- w ) new fetch_local_twelve
2035 :	anton	1.1	w = (Cell )(lp+3*sizeof(Cell));
2036 :
2037 :	pazsan	1.15	\+floating
2038 :	anton	1.1
2039 :	anton	1.47	f@local# ( -- r ) gforth f_fetch_local_number
2040 :	anton	1.1	r = (Float )(lp+(Cell)NEXT_INST);
2041 :			INC_IP(1);
2042 :
2043 :	anton	1.47	f@local0 ( -- r ) new f_fetch_local_zero
2044 :	anton	1.1	r = (Float )(lp+0*sizeof(Float));
2045 :
2046 :	anton	1.47	f@local1 ( -- r ) new f_fetch_local_eight
2047 :	anton	1.1	r = (Float )(lp+1*sizeof(Float));
2048 :
2049 :	pazsan	1.15	\+
2050 :	anton	1.1
2051 :	anton	1.47	laddr# ( -- c_addr ) gforth laddr_number
2052 :	anton	1.1	/* this can also be used to implement lp@ */
2053 :			c_addr = (Char *)(lp+(Cell)NEXT_INST);
2054 :			INC_IP(1);
2055 :
2056 :	anton	1.47	lp+!# ( -- ) gforth lp_plus_store_number
2057 :	anton	1.1	""used with negative immediate values it allocates memory on the
2058 :			local stack, a positive immediate argument drops memory from the local
2059 :			stack""
2060 :			lp += (Cell)NEXT_INST;
2061 :			INC_IP(1);
2062 :
2063 :	anton	1.47	lp- ( -- ) new minus_four_lp_plus_store
2064 :	anton	1.1	lp += -sizeof(Cell);
2065 :
2066 :	anton	1.47	lp+ ( -- ) new eight_lp_plus_store
2067 :	anton	1.1	lp += sizeof(Float);
2068 :
2069 :	anton	1.47	lp+2 ( -- ) new sixteen_lp_plus_store
2070 :	anton	1.1	lp += 2*sizeof(Float);
2071 :
2072 :	anton	1.47	lp! ( c_addr -- ) gforth lp_store
2073 :	anton	1.1	lp = (Address)c_addr;
2074 :
2075 :	anton	1.47	>l ( w -- ) gforth to_l
2076 :	anton	1.1	lp -= sizeof(Cell);
2077 :			(Cell )lp = w;
2078 :
2079 :	pazsan	1.15	\+floating
2080 :	anton	1.1
2081 :	anton	1.47	f>l ( r -- ) gforth f_to_l
2082 :	anton	1.1	lp -= sizeof(Float);
2083 :			(Float )lp = r;
2084 :
2085 :	anton	1.47	fpick ( u -- r ) gforth
2086 :	anton	1.52	""Actually the stack effect is @code{ r0 ... ru u -- r0 ... ru r0 }.""
2087 :	anton	1.11	r = fp[u+1]; /* +1, because update of fp happens before this fragment */
2088 :			:
2089 :			floats fp@ + f@ ;
2090 :
2091 :	pazsan	1.15	\+
2092 :			\+
2093 :	anton	1.1
2094 :	pazsan	1.15	\+OS
2095 :	anton	1.1
2096 :			define(`uploop',
2097 :			`pushdef(`$1', `$2')_uploop(`$1', `$2', `$3', `$4', `$5')`'popdef(`$1')')
2098 :			define(`_uploop',
2099 :			`ifelse($1, `$3', `$5',
2100 :			`$4`'define(`$1', incr($1))_uploop(`$1', `$2', `$3', `$4', `$5')')')
2101 :			\ argflist(argnum): Forth argument list
2102 :			define(argflist,
2103 :			`ifelse($1, 0, `',
2104 :			`uploop(`_i', 1, $1, `format(`u%d ', _i)', `format(`u%d ', _i)')')')
2105 :			\ argdlist(argnum): declare C's arguments
2106 :			define(argdlist,
2107 :			`ifelse($1, 0, `',
2108 :			`uploop(`_i', 1, $1, `Cell, ', `Cell')')')
2109 :			\ argclist(argnum): pass C's arguments
2110 :			define(argclist,
2111 :			`ifelse($1, 0, `',
2112 :			`uploop(`_i', 1, $1, `format(`u%d, ', _i)', `format(`u%d', _i)')')')
2113 :			\ icall(argnum)
2114 :			define(icall,
2115 :	anton	1.47	`icall$1 ( argflist($1)u -- uret ) gforth
2116 :	pazsan	1.9	uret = (SYSCALL(Cell(*)(argdlist($1)))u)(argclist($1));
2117 :	anton	1.1
2118 :			')
2119 :			define(fcall,
2120 :	anton	1.47	`fcall$1 ( argflist($1)u -- rret ) gforth
2121 :	pazsan	1.9	rret = (SYSCALL(Float(*)(argdlist($1)))u)(argclist($1));
2122 :	anton	1.1
2123 :			')
2124 :
2125 :	pazsan	1.46	\ close ' to keep fontify happy
2126 :	anton	1.1
2127 :	anton	1.47	open-lib ( c_addr1 u1 -- u2 ) gforth open_lib
2128 :	anton	1.1	#if defined(HAVE_LIBDL) \|\| defined(HAVE_DLOPEN)
2129 :	anton	1.8	#ifndef RTLD_GLOBAL
2130 :			#define RTLD_GLOBAL 0
2131 :			#endif
2132 :	pazsan	1.7	u2=(UCell) dlopen(cstr(c_addr1, u1, 1), RTLD_GLOBAL \| RTLD_LAZY);
2133 :	anton	1.1	#else
2134 :	pazsan	1.18	# ifdef _WIN32
2135 :	anton	1.1	u2 = (Cell) GetModuleHandle(cstr(c_addr1, u1, 1));
2136 :			# else
2137 :			#warning Define open-lib!
2138 :			u2 = 0;
2139 :			# endif
2140 :			#endif
2141 :
2142 :	anton	1.47	lib-sym ( c_addr1 u1 u2 -- u3 ) gforth lib_sym
2143 :	anton	1.1	#if defined(HAVE_LIBDL) \|\| defined(HAVE_DLOPEN)
2144 :			u3 = (UCell) dlsym((void*)u2,cstr(c_addr1, u1, 1));
2145 :			#else
2146 :	pazsan	1.18	# ifdef _WIN32
2147 :	anton	1.1	u3 = (Cell) GetProcAddress((HMODULE)u2, cstr(c_addr1, u1, 1));
2148 :			# else
2149 :			#warning Define lib-sym!
2150 :			u3 = 0;
2151 :			# endif
2152 :			#endif
2153 :
2154 :			uploop(i, 0, 7, `icall(i)')
2155 :			icall(20)
2156 :			uploop(i, 0, 7, `fcall(i)')
2157 :			fcall(20)
2158 :
2159 :	pazsan	1.15	\+
2160 :	anton	1.1
2161 :	anton	1.47	up! ( a_addr -- ) gforth up_store
2162 :	anton	1.1	UP=up=(char *)a_addr;
2163 :			:
2164 :			up ! ;
2165 :			Variable UP
2166 :	jwilke	1.34
2167 :	anton	1.47	wcall ( u -- ) gforth
2168 :	anton	1.64	IF_fpTOS(fp[0]=fpTOS);
2169 :	jwilke	1.34	FP=fp;
2170 :			sp=(SYSCALL(Cell()(Cell , void *))u)(sp, &FP);
2171 :			fp=FP;
2172 :	anton	1.64	IF_spTOS(spTOS=sp[0];)
2173 :			IF_fpTOS(fpTOS=fp[0]);
2174 :	pazsan	1.46
2175 :			\+file
2176 :
2177 :	anton	1.47	open-dir ( c_addr u -- wdirid wior ) gforth open_dir
2178 :	pazsan	1.46	wdirid = (Cell)opendir(tilde_cstr(c_addr, u, 1));
2179 :			wior = IOR(wdirid == 0);
2180 :
2181 :	anton	1.47	read-dir ( c_addr u1 wdirid -- u2 flag wior ) gforth read_dir
2182 :	pazsan	1.46	struct dirent * dent;
2183 :			dent = readdir((DIR *)wdirid);
2184 :			wior = 0;
2185 :			flag = -1;
2186 :			if(dent == NULL) {
2187 :			u2 = 0;
2188 :			flag = 0;
2189 :			} else {
2190 :			u2 = strlen(dent->d_name);
2191 :			if(u2 > u1)
2192 :			u2 = u1;
2193 :			memmove(c_addr, dent->d_name, u2);
2194 :			}
2195 :
2196 :	anton	1.47	close-dir ( wdirid -- wior ) gforth close_dir
2197 :	pazsan	1.46	wior = IOR(closedir((DIR *)wdirid));
2198 :
2199 :	anton	1.47	filename-match ( c_addr1 u1 c_addr2 u2 -- flag ) gforth match_file
2200 :	pazsan	1.46	char * string = cstr(c_addr1, u1, 1);
2201 :			char * pattern = cstr(c_addr2, u2, 0);
2202 :			flag = FLAG(!fnmatch(pattern, string, 0));
2203 :
2204 :			\+
2205 :	jwilke	1.34
2206 :	anton	1.47	newline ( -- c_addr u ) gforth
2207 :	anton	1.45	""String containing the newline sequence of the host OS""
2208 :			char newline[] = {
2209 :			#ifdef unix
2210 :			'\n'
2211 :			#else
2212 :			'\r','\n'
2213 :			#endif
2214 :			};
2215 :			c_addr=newline;
2216 :			u=sizeof(newline);
2217 :	pazsan	1.49	:
2218 :			"newline count ;
2219 :	pazsan	1.54	Create "newline e? crlf [IF] 2 c, $0D c, [ELSE] 1 c, [THEN] $0A c,
2220 :
2221 :			\+os
2222 :	anton	1.51
2223 :			utime ( -- dtime ) gforth
2224 :			""Report the current time in microseconds since some epoch.""
2225 :			struct timeval time1;
2226 :			gettimeofday(&time1,NULL);
2227 :			dtime = timeval2us(&time1);
2228 :
2229 :			cputime ( -- duser dsystem ) gforth
2230 :			""duser and dsystem are the respective user- and system-level CPU
2231 :			times used since the start of the Forth system (excluding child
2232 :			processes), in microseconds (the granularity may be much larger,
2233 :			however). On platforms without the getrusage call, it reports elapsed
2234 :			time (since some epoch) for duser and 0 for dsystem.""
2235 :			#ifdef HAVE_GETRUSAGE
2236 :			struct rusage usage;
2237 :			getrusage(RUSAGE_SELF, &usage);
2238 :			duser = timeval2us(&usage.ru_utime);
2239 :			dsystem = timeval2us(&usage.ru_stime);
2240 :			#else
2241 :			struct timeval time1;
2242 :			gettimeofday(&time1,NULL);
2243 :			duser = timeval2us(&time1);
2244 :	anton	1.57	#ifndef BUGGY_LONG_LONG
2245 :	anton	1.51	dsystem = (DCell)0;
2246 :	anton	1.57	#else
2247 :			dsystem=(DCell){0,0};
2248 :			#endif
2249 :	anton	1.51	#endif
2250 :
2251 :	pazsan	1.54	\+
2252 :
2253 :			\+floating
2254 :
2255 :	anton	1.51	v* ( f_addr1 nstride1 f_addr2 nstride2 ucount -- r ) gforth v_star
2256 :			""dot-product: r=v1*v2. The first element of v1 is at f_addr1, the
2257 :			next at f_addr1+nstride1 and so on (similar for v2). Both vectors have
2258 :			ucount elements.""
2259 :			for (r=0.; ucount>0; ucount--) {
2260 :			r += f_addr1 *f_addr2;
2261 :			f_addr1 = (Float *)(((Address)f_addr1)+nstride1);
2262 :			f_addr2 = (Float *)(((Address)f_addr2)+nstride2);
2263 :			}
2264 :	pazsan	1.54	:
2265 :			>r swap 2swap swap 0e r> 0 ?DO
2266 :			dup f@ over + 2swap dup f@ f* f+ over + 2swap
2267 :			LOOP 2drop 2drop ;
2268 :	anton	1.51
2269 :			faxpy ( ra f_x nstridex f_y nstridey ucount -- ) gforth
2270 :			""vy=ra*vx+vy""
2271 :			for (; ucount>0; ucount--) {
2272 :			f_y += ra *f_x;
2273 :			f_x = (Float *)(((Address)f_x)+nstridex);
2274 :			f_y = (Float *)(((Address)f_y)+nstridey);
2275 :			}
2276 :	pazsan	1.54	:
2277 :			>r swap 2swap swap r> 0 ?DO
2278 :			fdup dup f@ f* over + 2swap dup f@ f+ dup f! over + 2swap
2279 :			LOOP 2drop 2drop fdrop ;
2280 :	pazsan	1.60
2281 :			\+
2282 :
2283 :			\+file
2284 :
2285 :			(read-line) ( c_addr u1 wfileid -- u2 flag u3 wior ) file paren_read_line
2286 :			Cell c;
2287 :			flag=-1;
2288 :			u3=0;
2289 :			for(u2=0; u2<u1; u2++)
2290 :			{
2291 :			c = getc((FILE *)wfileid);
2292 :			u3++;
2293 :			if (c=='\n') break;
2294 :			if (c=='\r') {
2295 :			if ((c = getc((FILE *)wfileid))!='\n')
2296 :			ungetc(c,(FILE *)wfileid);
2297 :			else
2298 :			u3++;
2299 :			break;
2300 :			}
2301 :			if (c==EOF) {
2302 :			flag=FLAG(u2!=0);
2303 :			break;
2304 :			}
2305 :			c_addr[u2] = (Char)c;
2306 :			}
2307 :			wior=FILEIO(ferror((FILE *)wfileid));
2308 :	pazsan	1.54
2309 :			\+

CVS Admin

gforth: gforth/prim

ViewCVS and CVS Help