[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 :			\ f83name.* F83Name *
76 :	anton	1.67
77 :	anton	1.79	\E stack data-stack sp Cell
78 :			\E stack fp-stack fp Float
79 :			\E stack return-stack rp Cell
80 :			\E
81 :	anton	1.67	\E get-current prefixes set-current
82 :			\E
83 :			\E s" Bool" single data-stack type-prefix f
84 :			\E s" Char" single data-stack type-prefix c
85 :			\E s" Cell" single data-stack type-prefix n
86 :			\E s" Cell" single data-stack type-prefix w
87 :			\E s" UCell" single data-stack type-prefix u
88 :			\E s" DCell" double data-stack type-prefix d
89 :			\E s" UDCell" double data-stack type-prefix ud
90 :			\E s" Float" single fp-stack type-prefix r
91 :			\E s" Cell *" single data-stack type-prefix a_
92 :			\E s" Char *" single data-stack type-prefix c_
93 :			\E s" Float *" single data-stack type-prefix f_
94 :			\E s" DFloat *" single data-stack type-prefix df_
95 :			\E s" SFloat *" single data-stack type-prefix sf_
96 :			\E s" Xt" single data-stack type-prefix xt
97 :			\E s" struct F83Name *" single data-stack type-prefix f83name
98 :	anton	1.71	\E s" struct Longname *" single data-stack type-prefix longname
99 :	anton	1.67	\E
100 :			\E return-stack stack-prefix R:
101 :			\E inst-stream stack-prefix #
102 :			\E
103 :			\E set-current
104 :
105 :	anton	1.1	\
106 :			\
107 :			\
108 :			\ In addition the following names can be used:
109 :			\ ip the instruction pointer
110 :			\ sp the data stack pointer
111 :			\ rp the parameter stack pointer
112 :			\ lp the locals stack pointer
113 :			\ NEXT executes NEXT
114 :			\ cfa
115 :			\ NEXT1 executes NEXT1
116 :			\ FLAG(x) makes a Forth flag from a C flag
117 :			\
118 :			\
119 :			\
120 :			\ Percentages in comments are from Koopmans book: average/maximum use
121 :			\ (taken from four, not very representative benchmarks)
122 :			\
123 :			\
124 :			\
125 :			\ To do:
126 :			\
127 :			\ throw execute, cfa and NEXT1 out?
128 :			\ macroize ip, ip++, ip++ (pipelining)?
129 :
130 :			\ these m4 macros would collide with identifiers
131 :			undefine(`index')
132 :			undefine(`shift')
133 :	pazsan	1.78	undefine(`symbols')
134 :	anton	1.1
135 :	pazsan	1.83	\g control
136 :
137 :	anton	1.47	noop ( -- ) gforth
138 :	anton	1.1	:
139 :			;
140 :
141 :	anton	1.68	lit ( #w -- w ) gforth
142 :	anton	1.1	:
143 :			r> dup @ swap cell+ >r ;
144 :
145 :	anton	1.47	execute ( xt -- ) core
146 :	crook	1.29	""Perform the semantics represented by the execution token, @i{xt}.""
147 :	anton	1.1	ip=IP;
148 :	anton	1.64	IF_spTOS(spTOS = sp[0]);
149 :	anton	1.76	SUPER_END;
150 :	anton	1.1	EXEC(xt);
151 :
152 :	anton	1.47	perform ( a_addr -- ) gforth
153 :	anton	1.55	""@code{@@ execute}.""
154 :	anton	1.1	/* and pfe */
155 :			ip=IP;
156 :	anton	1.64	IF_spTOS(spTOS = sp[0]);
157 :	anton	1.76	SUPER_END;
158 :	anton	1.1	EXEC((Xt )a_addr);
159 :			:
160 :			@ execute ;
161 :
162 :	jwilke	1.31	\fhas? skipbranchprims 0= [IF]
163 :	pazsan	1.15	\+glocals
164 :	anton	1.1
165 :	anton	1.68	branch-lp+!# ( #ndisp #nlocals -- ) gforth branch_lp_plus_store_number
166 :	anton	1.1	/* this will probably not be used */
167 :	anton	1.68	lp += nlocals;
168 :			SET_IP((Xt *)(((Cell)(IP-2))+ndisp));
169 :	anton	1.1
170 :	pazsan	1.15	\+
171 :	anton	1.1
172 :	anton	1.68	branch ( #ndisp -- ) gforth
173 :			SET_IP((Xt *)(((Cell)(IP-1))+ndisp));
174 :	anton	1.1	:
175 :			r> dup @ + >r ;
176 :
177 :	anton	1.68	\ condbranch(forthname,stackeffect,restline,code,forthcode)
178 :	anton	1.1	\ this is non-syntactical: code must open a brace that is closed by the macro
179 :			define(condbranch,
180 :	anton	1.68	$1 ( `#'ndisp $2 ) $3
181 :			$4 SET_IP((Xt *)(((Cell)(IP-1))+ndisp));
182 :	anton	1.66	TAIL;
183 :	anton	1.1	}
184 :	anton	1.68	$5
185 :	anton	1.1
186 :	pazsan	1.15	\+glocals
187 :	anton	1.1
188 :	anton	1.68	$1-lp+!`#' ( `#'ndisp `#'nlocals $2 ) $3_lp_plus_store_number
189 :			$4 lp += nlocals;
190 :			SET_IP((Xt *)(((Cell)(IP-2))+ndisp));
191 :	anton	1.66	TAIL;
192 :	anton	1.1	}
193 :
194 :	pazsan	1.15	\+
195 :	anton	1.1	)
196 :
197 :	anton	1.68	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	1.68	?dup-?branch ( #ndisp 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	1.68	SET_IP((Xt *)(((Cell)(IP-1))+ndisp));
217 :			TAIL;
218 :	anton	1.1	}
219 :
220 :	anton	1.68	?dup-0=-?branch ( #ndisp f -- ) new question_dupe_zero_equals_question_branch
221 :	anton	1.1	""The run-time procedure compiled by @code{?DUP-0=-IF}.""
222 :			/* the approach taken here of declaring the word as having the stack
223 :			effect ( f -- ) and correcting for it in the branch-taken case costs a
224 :			few cycles in that case, but is easy to convert to a CONDBRANCH
225 :			invocation */
226 :			if (f!=0) {
227 :			sp--;
228 :	anton	1.68	SET_IP((Xt *)(((Cell)(IP-1))+ndisp));
229 :	anton	1.1	NEXT;
230 :			}
231 :
232 :	pazsan	1.15	\+
233 :	jwilke	1.31	\f[THEN]
234 :			\fhas? skiploopprims 0= [IF]
235 :	anton	1.1
236 :	anton	1.68	condbranch((next),R:n1 -- R:n2,cmFORTH paren_next,
237 :	anton	1.65	n2=n1-1;
238 :			if (n1) {
239 :	anton	1.1	,:
240 :			r> r> dup 1- >r
241 :			IF dup @ + >r ELSE cell+ >r THEN ;)
242 :
243 :	anton	1.68	condbranch((loop),R:nlimit R:n1 -- R:nlimit R:n2,gforth paren_loop,
244 :	anton	1.65	n2=n1+1;
245 :			if (n2 != nlimit) {
246 :	anton	1.1	,:
247 :			r> r> 1+ r> 2dup =
248 :			IF >r 1- >r cell+ >r
249 :			ELSE >r >r dup @ + >r THEN ;)
250 :
251 :	anton	1.68	condbranch((+loop),n R:nlimit R:n1 -- R:nlimit R:n2,gforth paren_plus_loop,
252 :	anton	1.1	/* !! check this thoroughly */
253 :			/* sign bit manipulation and test: (x^y)<0 is equivalent to (x<0) != (y<0) */
254 :			/* dependent upon two's complement arithmetic */
255 :	anton	1.65	Cell olddiff = n1-nlimit;
256 :			n2=n1+n;
257 :	anton	1.1	if ((olddiff^(olddiff+n))>=0 /* the limit is not crossed */
258 :			\|\| (olddiff^n)>=0 /* it is a wrap-around effect */) {
259 :			,:
260 :			r> swap
261 :			r> r> 2dup - >r
262 :			2 pick r@ + r@ xor 0< 0=
263 :			3 pick r> xor 0< 0= or
264 :			IF >r + >r dup @ + >r
265 :			ELSE >r >r drop cell+ >r THEN ;)
266 :
267 :	pazsan	1.15	\+xconds
268 :	anton	1.1
269 :	anton	1.68	condbranch((-loop),u R:nlimit R:n1 -- R:nlimit R:n2,gforth paren_minus_loop,
270 :	anton	1.65	UCell olddiff = n1-nlimit;
271 :			n2=n1-u;
272 :	anton	1.1	if (olddiff>u) {
273 :			,)
274 :
275 :	anton	1.68	condbranch((s+loop),n R:nlimit R:n1 -- R:nlimit R:n2,gforth paren_symmetric_plus_loop,
276 :	anton	1.1	""The run-time procedure compiled by S+LOOP. It loops until the index
277 :			crosses the boundary between limit and limit-sign(n). I.e. a symmetric
278 :			version of (+LOOP).""
279 :			/* !! check this thoroughly */
280 :	anton	1.65	Cell diff = n1-nlimit;
281 :	anton	1.1	Cell newdiff = diff+n;
282 :			if (n<0) {
283 :			diff = -diff;
284 :			newdiff = -newdiff;
285 :			}
286 :	anton	1.65	n2=n1+n;
287 :	anton	1.1	if (diff>=0 \|\| newdiff<0) {
288 :			,)
289 :
290 :	pazsan	1.15	\+
291 :	anton	1.1
292 :	anton	1.65	unloop ( R:w1 R:w2 -- ) core
293 :			/* !! alias for 2rdrop */
294 :	anton	1.1	:
295 :			r> rdrop rdrop >r ;
296 :
297 :	anton	1.65	(for) ( ncount -- R:nlimit R:ncount ) cmFORTH paren_for
298 :	anton	1.1	/* or (for) = >r -- collides with unloop! */
299 :	anton	1.65	nlimit=0;
300 :	anton	1.1	:
301 :			r> swap 0 >r >r >r ;
302 :
303 :	anton	1.65	(do) ( nlimit nstart -- R:nlimit R:nstart ) gforth paren_do
304 :	anton	1.1	:
305 :			r> swap rot >r >r >r ;
306 :
307 :	anton	1.68	(?do) ( #ndisp nlimit nstart -- R:nlimit R:nstart ) gforth paren_question_do
308 :	anton	1.1	if (nstart == nlimit) {
309 :	anton	1.68	SET_IP((Xt *)(((Cell)(IP-1))+ndisp));
310 :			TAIL;
311 :	anton	1.1	}
312 :			:
313 :			2dup =
314 :			IF r> swap rot >r >r
315 :			dup @ + >r
316 :			ELSE r> swap rot >r >r
317 :			cell+ >r
318 :			THEN ; \ --> CORE-EXT
319 :
320 :	pazsan	1.15	\+xconds
321 :	anton	1.1
322 :	anton	1.68	(+do) ( #ndisp nlimit nstart -- R:nlimit R:nstart ) gforth paren_plus_do
323 :	anton	1.1	if (nstart >= nlimit) {
324 :	anton	1.68	SET_IP((Xt *)(((Cell)(IP-1))+ndisp));
325 :			TAIL;
326 :	anton	1.1	}
327 :			:
328 :			swap 2dup
329 :			r> swap >r swap >r
330 :			>=
331 :			IF
332 :			dup @ +
333 :			ELSE
334 :			cell+
335 :			THEN >r ;
336 :
337 :	anton	1.68	(u+do) ( #ndisp ulimit ustart -- R:ulimit R:ustart ) gforth paren_u_plus_do
338 :	anton	1.1	if (ustart >= ulimit) {
339 :	anton	1.68	SET_IP((Xt *)(((Cell)(IP-1))+ndisp));
340 :			TAIL;
341 :	anton	1.1	}
342 :			:
343 :			swap 2dup
344 :			r> swap >r swap >r
345 :			u>=
346 :			IF
347 :			dup @ +
348 :			ELSE
349 :			cell+
350 :			THEN >r ;
351 :
352 :	anton	1.68	(-do) ( #ndisp nlimit nstart -- R:nlimit R:nstart ) gforth paren_minus_do
353 :	anton	1.1	if (nstart <= nlimit) {
354 :	anton	1.68	SET_IP((Xt *)(((Cell)(IP-1))+ndisp));
355 :			TAIL;
356 :	anton	1.1	}
357 :			:
358 :			swap 2dup
359 :			r> swap >r swap >r
360 :			<=
361 :			IF
362 :			dup @ +
363 :			ELSE
364 :			cell+
365 :			THEN >r ;
366 :
367 :	anton	1.68	(u-do) ( #ndisp ulimit ustart -- R:ulimit R:ustart ) gforth paren_u_minus_do
368 :	anton	1.1	if (ustart <= ulimit) {
369 :	anton	1.68	SET_IP((Xt *)(((Cell)(IP-1))+ndisp));
370 :			TAIL;
371 :	anton	1.1	}
372 :			:
373 :			swap 2dup
374 :			r> swap >r swap >r
375 :			u<=
376 :			IF
377 :			dup @ +
378 :			ELSE
379 :			cell+
380 :			THEN >r ;
381 :
382 :	pazsan	1.15	\+
383 :	anton	1.1
384 :	jwilke	1.5	\ don't make any assumptions where the return stack is!!
385 :			\ implement this in machine code if it should run quickly!
386 :
387 :	anton	1.65	i ( R:n -- R:n n ) core
388 :	anton	1.1	:
389 :	jwilke	1.5	\ rp@ cell+ @ ;
390 :			r> r> tuck >r >r ;
391 :	anton	1.1
392 :	anton	1.65	i' ( R:w R:w2 -- R:w R:w2 w ) gforth i_tick
393 :	anton	1.1	:
394 :	jwilke	1.5	\ rp@ cell+ cell+ @ ;
395 :			r> r> r> dup itmp ! >r >r >r itmp @ ;
396 :			variable itmp
397 :	anton	1.1
398 :	anton	1.65	j ( R:n R:d1 -- n R:n R:d1 ) core
399 :	anton	1.1	:
400 :	jwilke	1.5	\ rp@ cell+ cell+ cell+ @ ;
401 :			r> r> r> r> dup itmp ! >r >r >r >r itmp @ ;
402 :			[IFUNDEF] itmp variable itmp [THEN]
403 :	anton	1.1
404 :	anton	1.65	k ( R:n R:d1 R:d2 -- n R:n R:d1 R:d2 ) gforth
405 :	anton	1.1	:
406 :	jwilke	1.5	\ rp@ [ 5 cells ] Literal + @ ;
407 :			r> r> r> r> r> r> dup itmp ! >r >r >r >r >r >r itmp @ ;
408 :			[IFUNDEF] itmp variable itmp [THEN]
409 :	jwilke	1.31
410 :			\f[THEN]
411 :	anton	1.1
412 :			\ digit is high-level: 0/0%
413 :
414 :	pazsan	1.83	\g strings
415 :
416 :	anton	1.47	move ( c_from c_to ucount -- ) core
417 :	anton	1.52	""Copy the contents of @i{ucount} aus at @i{c-from} to
418 :	anton	1.33	@i{c-to}. @code{move} works correctly even if the two areas overlap.""
419 :	anton	1.52	/* !! note that the standard specifies addr, not c-addr */
420 :	anton	1.1	memmove(c_to,c_from,ucount);
421 :			/* make an Ifdef for bsd and others? */
422 :			:
423 :			>r 2dup u< IF r> cmove> ELSE r> cmove THEN ;
424 :
425 :	anton	1.47	cmove ( c_from c_to u -- ) string c_move
426 :	anton	1.33	""Copy the contents of @i{ucount} characters from data space at
427 :			@i{c-from} to @i{c-to}. The copy proceeds @code{char}-by-@code{char}
428 :			from low address to high address; i.e., for overlapping areas it is
429 :			safe if @i{c-to}=<@i{c-from}.""
430 :	anton	1.1	while (u-- > 0)
431 :			c_to++ = c_from++;
432 :			:
433 :			bounds ?DO dup c@ I c! 1+ LOOP drop ;
434 :
435 :	anton	1.47	cmove> ( c_from c_to u -- ) string c_move_up
436 :	anton	1.33	""Copy the contents of @i{ucount} characters from data space at
437 :			@i{c-from} to @i{c-to}. The copy proceeds @code{char}-by-@code{char}
438 :			from high address to low address; i.e., for overlapping areas it is
439 :			safe if @i{c-to}>=@i{c-from}.""
440 :	anton	1.1	while (u-- > 0)
441 :			c_to[u] = c_from[u];
442 :			:
443 :			dup 0= IF drop 2drop exit THEN
444 :			rot over + -rot bounds swap 1-
445 :			DO 1- dup c@ I c! -1 +LOOP drop ;
446 :
447 :	anton	1.47	fill ( c_addr u c -- ) core
448 :	anton	1.52	""Store @i{c} in @i{u} chars starting at @i{c-addr}.""
449 :	anton	1.1	memset(c_addr,c,u);
450 :			:
451 :			-rot bounds
452 :			?DO dup I c! LOOP drop ;
453 :
454 :	anton	1.47	compare ( c_addr1 u1 c_addr2 u2 -- n ) string
455 :	crook	1.29	""Compare two strings lexicographically. If they are equal, @i{n} is 0; if
456 :			the first string is smaller, @i{n} is -1; if the first string is larger, @i{n}
457 :	anton	1.1	is 1. Currently this is based on the machine's character
458 :	crook	1.26	comparison. In the future, this may change to consider the current
459 :	anton	1.1	locale and its collation order.""
460 :	pazsan	1.46	/* close ' to keep fontify happy */
461 :	anton	1.1	n = memcmp(c_addr1, c_addr2, u1<u2 ? u1 : u2);
462 :			if (n==0)
463 :			n = u1-u2;
464 :			if (n<0)
465 :			n = -1;
466 :			else if (n>0)
467 :			n = 1;
468 :			:
469 :	pazsan	1.43	rot 2dup swap - >r min swap -text dup
470 :			IF rdrop ELSE drop r> sgn THEN ;
471 :			: sgn ( n -- -1/0/1 )
472 :			dup 0= IF EXIT THEN 0< 2* 1+ ;
473 :	anton	1.1
474 :	anton	1.47	-text ( c_addr1 u c_addr2 -- n ) new dash_text
475 :	anton	1.1	n = memcmp(c_addr1, c_addr2, u);
476 :			if (n<0)
477 :			n = -1;
478 :			else if (n>0)
479 :			n = 1;
480 :			:
481 :			swap bounds
482 :			?DO dup c@ I c@ = WHILE 1+ LOOP drop 0
483 :	pazsan	1.49	ELSE c@ I c@ - unloop THEN sgn ;
484 :	pazsan	1.43	: sgn ( n -- -1/0/1 )
485 :			dup 0= IF EXIT THEN 0< 2* 1+ ;
486 :	anton	1.1
487 :	anton	1.47	toupper ( c1 -- c2 ) gforth
488 :	crook	1.29	""If @i{c1} is a lower-case character (in the current locale), @i{c2}
489 :	anton	1.25	is the equivalent upper-case character. All other characters are unchanged.""
490 :	anton	1.1	c2 = toupper(c1);
491 :			:
492 :			dup [char] a - [ char z char a - 1 + ] Literal u< bl and - ;
493 :
494 :	anton	1.47	capscomp ( c_addr1 u c_addr2 -- n ) new
495 :	anton	1.1	n = memcasecmp(c_addr1, c_addr2, u); /* !! use something that works in all locales */
496 :			if (n<0)
497 :			n = -1;
498 :			else if (n>0)
499 :			n = 1;
500 :			:
501 :			swap bounds
502 :			?DO dup c@ I c@ <>
503 :			IF dup c@ toupper I c@ toupper =
504 :			ELSE true THEN WHILE 1+ LOOP drop 0
505 :	pazsan	1.49	ELSE c@ toupper I c@ toupper - unloop THEN sgn ;
506 :	anton	1.1
507 :	anton	1.47	-trailing ( c_addr u1 -- c_addr u2 ) string dash_trailing
508 :	crook	1.29	""Adjust the string specified by @i{c-addr, u1} to remove all trailing
509 :			spaces. @i{u2} is the length of the modified string.""
510 :	anton	1.1	u2 = u1;
511 :	anton	1.4	while (u2>0 && c_addr[u2-1] == ' ')
512 :	anton	1.1	u2--;
513 :			:
514 :			BEGIN 1- 2dup + c@ bl = WHILE
515 :			dup 0= UNTIL ELSE 1+ THEN ;
516 :
517 :	anton	1.47	/string ( c_addr1 u1 n -- c_addr2 u2 ) string slash_string
518 :	crook	1.29	""Adjust the string specified by @i{c-addr1, u1} to remove @i{n}
519 :	crook	1.27	characters from the start of the string.""
520 :	anton	1.1	c_addr2 = c_addr1+n;
521 :			u2 = u1-n;
522 :			:
523 :			tuck - >r + r> dup 0< IF - 0 THEN ;
524 :
525 :	pazsan	1.83	\g arith
526 :
527 :	anton	1.47	+ ( n1 n2 -- n ) core plus
528 :	anton	1.1	n = n1+n2;
529 :
530 :			\ PFE-0.9.14 has it differently, but the next release will have it as follows
531 :	anton	1.47	under+ ( n1 n2 n3 -- n n2 ) gforth under_plus
532 :	crook	1.29	""add @i{n3} to @i{n1} (giving @i{n})""
533 :	anton	1.1	n = n1+n3;
534 :			:
535 :			rot + swap ;
536 :
537 :	anton	1.47	- ( n1 n2 -- n ) core minus
538 :	anton	1.1	n = n1-n2;
539 :			:
540 :			negate + ;
541 :
542 :	anton	1.47	negate ( n1 -- n2 ) core
543 :	anton	1.1	/* use minus as alias */
544 :			n2 = -n1;
545 :			:
546 :			invert 1+ ;
547 :
548 :	anton	1.47	1+ ( n1 -- n2 ) core one_plus
549 :	anton	1.1	n2 = n1+1;
550 :			:
551 :			1 + ;
552 :
553 :	anton	1.47	1- ( n1 -- n2 ) core one_minus
554 :	anton	1.1	n2 = n1-1;
555 :			:
556 :			1 - ;
557 :
558 :	anton	1.47	max ( n1 n2 -- n ) core
559 :	anton	1.1	if (n1<n2)
560 :			n = n2;
561 :			else
562 :			n = n1;
563 :			:
564 :			2dup < IF swap THEN drop ;
565 :
566 :	anton	1.47	min ( n1 n2 -- n ) core
567 :	anton	1.1	if (n1<n2)
568 :			n = n1;
569 :			else
570 :			n = n2;
571 :			:
572 :			2dup > IF swap THEN drop ;
573 :
574 :	anton	1.52	abs ( n -- u ) core
575 :			if (n<0)
576 :			u = -n;
577 :	anton	1.1	else
578 :	anton	1.52	u = n;
579 :	anton	1.1	:
580 :			dup 0< IF negate THEN ;
581 :
582 :	anton	1.47	* ( n1 n2 -- n ) core star
583 :	anton	1.1	n = n1*n2;
584 :			:
585 :			um* drop ;
586 :
587 :	anton	1.47	/ ( n1 n2 -- n ) core slash
588 :	anton	1.1	n = n1/n2;
589 :			:
590 :			/mod nip ;
591 :
592 :	anton	1.47	mod ( n1 n2 -- n ) core
593 :	anton	1.1	n = n1%n2;
594 :			:
595 :			/mod drop ;
596 :
597 :	anton	1.47	/mod ( n1 n2 -- n3 n4 ) core slash_mod
598 :	anton	1.1	n4 = n1/n2;
599 :			n3 = n1%n2; /* !! is this correct? look into C standard! */
600 :			:
601 :			>r s>d r> fm/mod ;
602 :
603 :	anton	1.47	2* ( n1 -- n2 ) core two_star
604 :	anton	1.52	""Shift left by 1; also works on unsigned numbers""
605 :	anton	1.1	n2 = 2*n1;
606 :			:
607 :			dup + ;
608 :
609 :	anton	1.47	2/ ( n1 -- n2 ) core two_slash
610 :	anton	1.52	""Arithmetic shift right by 1. For signed numbers this is a floored
611 :			division by 2 (note that @code{/} not necessarily floors).""
612 :	anton	1.1	n2 = n1>>1;
613 :			:
614 :			dup MINI and IF 1 ELSE 0 THEN
615 :			[ bits/byte cell * 1- ] literal
616 :	jwilke	1.5	0 DO 2* swap dup 2* >r MINI and
617 :	anton	1.1	IF 1 ELSE 0 THEN or r> swap
618 :			LOOP nip ;
619 :
620 :	anton	1.47	fm/mod ( d1 n1 -- n2 n3 ) core f_m_slash_mod
621 :	crook	1.29	""Floored division: @i{d1} = @i{n3}*@i{n1}+@i{n2}, @i{n1}>@i{n2}>=0 or 0>=@i{n2}>@i{n1}.""
622 :	anton	1.1	#ifdef BUGGY_LONG_LONG
623 :			DCell r = fmdiv(d1,n1);
624 :			n2=r.hi;
625 :			n3=r.lo;
626 :			#else
627 :			/* assumes that the processor uses either floored or symmetric division */
628 :			n3 = d1/n1;
629 :			n2 = d1%n1;
630 :			/* note that this 1%-3>0 is optimized by the compiler */
631 :			if (1%-3>0 && (d1<0) != (n1<0) && n2!=0) {
632 :			n3--;
633 :			n2+=n1;
634 :			}
635 :			#endif
636 :			:
637 :			dup >r dup 0< IF negate >r dnegate r> THEN
638 :			over 0< IF tuck + swap THEN
639 :			um/mod
640 :			r> 0< IF swap negate swap THEN ;
641 :
642 :	anton	1.47	sm/rem ( d1 n1 -- n2 n3 ) core s_m_slash_rem
643 :	crook	1.29	""Symmetric division: @i{d1} = @i{n3}*@i{n1}+@i{n2}, sign(@i{n2})=sign(@i{d1}) or 0.""
644 :	anton	1.1	#ifdef BUGGY_LONG_LONG
645 :			DCell r = smdiv(d1,n1);
646 :			n2=r.hi;
647 :			n3=r.lo;
648 :			#else
649 :			/* assumes that the processor uses either floored or symmetric division */
650 :			n3 = d1/n1;
651 :			n2 = d1%n1;
652 :			/* note that this 1%-3<0 is optimized by the compiler */
653 :			if (1%-3<0 && (d1<0) != (n1<0) && n2!=0) {
654 :			n3++;
655 :			n2-=n1;
656 :			}
657 :			#endif
658 :			:
659 :			over >r dup >r abs -rot
660 :			dabs rot um/mod
661 :			r> r@ xor 0< IF negate THEN
662 :			r> 0< IF swap negate swap THEN ;
663 :
664 :	anton	1.47	m* ( n1 n2 -- d ) core m_star
665 :	anton	1.1	#ifdef BUGGY_LONG_LONG
666 :			d = mmul(n1,n2);
667 :			#else
668 :			d = (DCell)n1 * (DCell)n2;
669 :			#endif
670 :			:
671 :			2dup 0< and >r
672 :			2dup swap 0< and >r
673 :			um* r> - r> - ;
674 :
675 :	anton	1.47	um* ( u1 u2 -- ud ) core u_m_star
676 :	anton	1.1	/* use u* as alias */
677 :			#ifdef BUGGY_LONG_LONG
678 :			ud = ummul(u1,u2);
679 :			#else
680 :			ud = (UDCell)u1 * (UDCell)u2;
681 :			#endif
682 :			:
683 :			>r >r 0 0 r> r> [ 8 cells ] literal 0
684 :			DO
685 :			over >r dup >r 0< and d2*+ drop
686 :			r> 2* r> swap
687 :			LOOP 2drop ;
688 :			: d2*+ ( ud n -- ud+n c )
689 :			over MINI
690 :			and >r >r 2dup d+ swap r> + swap r> ;
691 :
692 :	anton	1.47	um/mod ( ud u1 -- u2 u3 ) core u_m_slash_mod
693 :	anton	1.32	""ud=u3*u1+u2, u1>u2>=0""
694 :	anton	1.1	#ifdef BUGGY_LONG_LONG
695 :			UDCell r = umdiv(ud,u1);
696 :			u2=r.hi;
697 :			u3=r.lo;
698 :			#else
699 :			u3 = ud/u1;
700 :			u2 = ud%u1;
701 :			#endif
702 :			:
703 :			0 swap [ 8 cells 1 + ] literal 0
704 :	jwilke	1.5	?DO /modstep
705 :	anton	1.1	LOOP drop swap 1 rshift or swap ;
706 :			: /modstep ( ud c R: u -- ud-?u c R: u )
707 :	jwilke	1.5	>r over r@ u< 0= or IF r@ - 1 ELSE 0 THEN d2*+ r> ;
708 :	anton	1.1	: d2*+ ( ud n -- ud+n c )
709 :			over MINI
710 :			and >r >r 2dup d+ swap r> + swap r> ;
711 :
712 :	anton	1.47	m+ ( d1 n -- d2 ) double m_plus
713 :	anton	1.1	#ifdef BUGGY_LONG_LONG
714 :			d2.lo = d1.lo+n;
715 :			d2.hi = d1.hi - (n<0) + (d2.lo<d1.lo);
716 :			#else
717 :			d2 = d1+n;
718 :			#endif
719 :			:
720 :			s>d d+ ;
721 :
722 :	anton	1.47	d+ ( d1 d2 -- d ) double d_plus
723 :	anton	1.1	#ifdef BUGGY_LONG_LONG
724 :			d.lo = d1.lo+d2.lo;
725 :			d.hi = d1.hi + d2.hi + (d.lo<d1.lo);
726 :			#else
727 :			d = d1+d2;
728 :			#endif
729 :			:
730 :			rot + >r tuck + swap over u> r> swap - ;
731 :
732 :	anton	1.47	d- ( d1 d2 -- d ) double d_minus
733 :	anton	1.1	#ifdef BUGGY_LONG_LONG
734 :			d.lo = d1.lo - d2.lo;
735 :			d.hi = d1.hi-d2.hi-(d1.lo<d2.lo);
736 :			#else
737 :			d = d1-d2;
738 :			#endif
739 :			:
740 :			dnegate d+ ;
741 :
742 :	anton	1.47	dnegate ( d1 -- d2 ) double d_negate
743 :	anton	1.1	/* use dminus as alias */
744 :			#ifdef BUGGY_LONG_LONG
745 :			d2 = dnegate(d1);
746 :			#else
747 :			d2 = -d1;
748 :			#endif
749 :			:
750 :			invert swap negate tuck 0= - ;
751 :
752 :	anton	1.47	d2* ( d1 -- d2 ) double d_two_star
753 :	anton	1.52	""Shift left by 1; also works on unsigned numbers""
754 :	anton	1.1	#ifdef BUGGY_LONG_LONG
755 :			d2.lo = d1.lo<<1;
756 :			d2.hi = (d1.hi<<1) \| (d1.lo>>(CELL_BITS-1));
757 :			#else
758 :			d2 = 2*d1;
759 :			#endif
760 :			:
761 :			2dup d+ ;
762 :
763 :	anton	1.47	d2/ ( d1 -- d2 ) double d_two_slash
764 :	anton	1.52	""Arithmetic shift right by 1. For signed numbers this is a floored
765 :			division by 2.""
766 :	anton	1.1	#ifdef BUGGY_LONG_LONG
767 :			d2.hi = d1.hi>>1;
768 :			d2.lo= (d1.lo>>1) \| (d1.hi<<(CELL_BITS-1));
769 :			#else
770 :			d2 = d1>>1;
771 :			#endif
772 :			:
773 :			dup 1 and >r 2/ swap 2/ [ 1 8 cells 1- lshift 1- ] Literal and
774 :			r> IF [ 1 8 cells 1- lshift ] Literal + THEN swap ;
775 :
776 :	anton	1.47	and ( w1 w2 -- w ) core
777 :	anton	1.1	w = w1&w2;
778 :
779 :	anton	1.47	or ( w1 w2 -- w ) core
780 :	anton	1.1	w = w1\|w2;
781 :			:
782 :			invert swap invert and invert ;
783 :
784 :	anton	1.47	xor ( w1 w2 -- w ) core x_or
785 :	anton	1.1	w = w1^w2;
786 :
787 :	anton	1.47	invert ( w1 -- w2 ) core
788 :	anton	1.1	w2 = ~w1;
789 :			:
790 :			MAXU xor ;
791 :
792 :	anton	1.47	rshift ( u1 n -- u2 ) core r_shift
793 :	anton	1.53	""Logical shift right by @i{n} bits.""
794 :	anton	1.1	u2 = u1>>n;
795 :			:
796 :			0 ?DO 2/ MAXI and LOOP ;
797 :
798 :	anton	1.47	lshift ( u1 n -- u2 ) core l_shift
799 :	anton	1.1	u2 = u1<<n;
800 :			:
801 :			0 ?DO 2* LOOP ;
802 :
803 :			\ comparisons(prefix, args, prefix, arg1, arg2, wordsets...)
804 :			define(comparisons,
805 :	anton	1.47	$1= ( $2 -- f ) $6 $3equals
806 :	anton	1.1	f = FLAG($4==$5);
807 :			:
808 :			[ char $1x char 0 = [IF]
809 :			] IF false ELSE true THEN [
810 :			[ELSE]
811 :			] xor 0= [
812 :			[THEN] ] ;
813 :
814 :	anton	1.47	$1<> ( $2 -- f ) $7 $3not_equals
815 :	anton	1.1	f = FLAG($4!=$5);
816 :			:
817 :			[ char $1x char 0 = [IF]
818 :			] IF true ELSE false THEN [
819 :			[ELSE]
820 :			] xor 0<> [
821 :			[THEN] ] ;
822 :
823 :	anton	1.47	$1< ( $2 -- f ) $8 $3less_than
824 :	anton	1.1	f = FLAG($4<$5);
825 :			:
826 :			[ char $1x char 0 = [IF]
827 :			] MINI and 0<> [
828 :			[ELSE] char $1x char u = [IF]
829 :			] 2dup xor 0< IF nip ELSE - THEN 0< [
830 :			[ELSE]
831 :			] MINI xor >r MINI xor r> u< [
832 :			[THEN]
833 :			[THEN] ] ;
834 :
835 :	anton	1.47	$1> ( $2 -- f ) $9 $3greater_than
836 :	anton	1.1	f = FLAG($4>$5);
837 :			:
838 :			[ char $1x char 0 = [IF] ] negate [ [ELSE] ] swap [ [THEN] ]
839 :			$1< ;
840 :
841 :	anton	1.47	$1<= ( $2 -- f ) gforth $3less_or_equal
842 :	anton	1.1	f = FLAG($4<=$5);
843 :			:
844 :			$1> 0= ;
845 :
846 :	anton	1.47	$1>= ( $2 -- f ) gforth $3greater_or_equal
847 :	anton	1.1	f = FLAG($4>=$5);
848 :			:
849 :			[ char $1x char 0 = [IF] ] negate [ [ELSE] ] swap [ [THEN] ]
850 :			$1<= ;
851 :
852 :			)
853 :
854 :			comparisons(0, n, zero_, n, 0, core, core-ext, core, core-ext)
855 :			comparisons(, n1 n2, , n1, n2, core, core-ext, core, core)
856 :			comparisons(u, u1 u2, u_, u1, u2, gforth, gforth, core, core-ext)
857 :
858 :			\ dcomparisons(prefix, args, prefix, arg1, arg2, wordsets...)
859 :			define(dcomparisons,
860 :	anton	1.47	$1= ( $2 -- f ) $6 $3equals
861 :	anton	1.1	#ifdef BUGGY_LONG_LONG
862 :			f = FLAG($4.lo==$5.lo && $4.hi==$5.hi);
863 :			#else
864 :			f = FLAG($4==$5);
865 :			#endif
866 :
867 :	anton	1.47	$1<> ( $2 -- f ) $7 $3not_equals
868 :	anton	1.1	#ifdef BUGGY_LONG_LONG
869 :			f = FLAG($4.lo!=$5.lo \|\| $4.hi!=$5.hi);
870 :			#else
871 :			f = FLAG($4!=$5);
872 :			#endif
873 :
874 :	anton	1.47	$1< ( $2 -- f ) $8 $3less_than
875 :	anton	1.1	#ifdef BUGGY_LONG_LONG
876 :			f = FLAG($4.hi==$5.hi ? $4.lo<$5.lo : $4.hi<$5.hi);
877 :			#else
878 :			f = FLAG($4<$5);
879 :			#endif
880 :
881 :	anton	1.47	$1> ( $2 -- f ) $9 $3greater_than
882 :	anton	1.1	#ifdef BUGGY_LONG_LONG
883 :			f = FLAG($4.hi==$5.hi ? $4.lo>$5.lo : $4.hi>$5.hi);
884 :			#else
885 :			f = FLAG($4>$5);
886 :			#endif
887 :
888 :	anton	1.47	$1<= ( $2 -- f ) gforth $3less_or_equal
889 :	anton	1.1	#ifdef BUGGY_LONG_LONG
890 :			f = FLAG($4.hi==$5.hi ? $4.lo<=$5.lo : $4.hi<=$5.hi);
891 :			#else
892 :			f = FLAG($4<=$5);
893 :			#endif
894 :
895 :	anton	1.47	$1>= ( $2 -- f ) gforth $3greater_or_equal
896 :	anton	1.1	#ifdef BUGGY_LONG_LONG
897 :			f = FLAG($4.hi==$5.hi ? $4.lo>=$5.lo : $4.hi>=$5.hi);
898 :			#else
899 :			f = FLAG($4>=$5);
900 :			#endif
901 :
902 :			)
903 :
904 :	pazsan	1.15	\+dcomps
905 :	anton	1.1
906 :			dcomparisons(d, d1 d2, d_, d1, d2, double, gforth, double, gforth)
907 :			dcomparisons(d0, d, d_zero_, d, DZERO, double, gforth, double, gforth)
908 :			dcomparisons(du, ud1 ud2, d_u_, ud1, ud2, gforth, gforth, double-ext, gforth)
909 :
910 :	pazsan	1.15	\+
911 :	anton	1.1
912 :	anton	1.47	within ( u1 u2 u3 -- f ) core-ext
913 :	anton	1.32	""u2=<u1<u3 or: u3=<u2 and u1 is not in [u3,u2). This works for
914 :			unsigned and signed numbers (but not a mixture). Another way to think
915 :			about this word is to consider the numbers as a circle (wrapping
916 :			around from @code{max-u} to 0 for unsigned, and from @code{max-n} to
917 :			min-n for signed numbers); now consider the range from u2 towards
918 :			increasing numbers up to and excluding u3 (giving an empty range if
919 :	anton	1.52	u2=u3); if u1 is in this range, @code{within} returns true.""
920 :	anton	1.1	f = FLAG(u1-u2 < u3-u2);
921 :			:
922 :			over - >r - r> u< ;
923 :
924 :	pazsan	1.83	\g internal
925 :
926 :	anton	1.47	sp@ ( -- a_addr ) gforth sp_fetch
927 :	anton	1.1	a_addr = sp+1;
928 :
929 :	anton	1.47	sp! ( a_addr -- ) gforth sp_store
930 :	anton	1.1	sp = a_addr;
931 :	anton	1.64	/* works with and without spTOS caching */
932 :	anton	1.1
933 :	anton	1.47	rp@ ( -- a_addr ) gforth rp_fetch
934 :	anton	1.1	a_addr = rp;
935 :
936 :	anton	1.47	rp! ( a_addr -- ) gforth rp_store
937 :	anton	1.1	rp = a_addr;
938 :
939 :	pazsan	1.15	\+floating
940 :	anton	1.1
941 :	anton	1.47	fp@ ( -- f_addr ) gforth fp_fetch
942 :	anton	1.1	f_addr = fp;
943 :
944 :	anton	1.47	fp! ( f_addr -- ) gforth fp_store
945 :	anton	1.1	fp = f_addr;
946 :
947 :	pazsan	1.15	\+
948 :	anton	1.1
949 :	anton	1.65	;s ( R:w -- ) gforth semis
950 :	crook	1.22	""The primitive compiled by @code{EXIT}.""
951 :	anton	1.65	SET_IP((Xt *)w);
952 :	anton	1.1
953 :	pazsan	1.83	\g stack
954 :
955 :	anton	1.65	>r ( w -- R:w ) core to_r
956 :	anton	1.1	:
957 :			(>r) ;
958 :			: (>r) rp@ cell+ @ rp@ ! rp@ cell+ ! ;
959 :
960 :	anton	1.65	r> ( R:w -- w ) core r_from
961 :	anton	1.1	:
962 :			rp@ cell+ @ rp@ @ rp@ cell+ ! (rdrop) rp@ ! ;
963 :			Create (rdrop) ' ;s A,
964 :
965 :	anton	1.65	rdrop ( R:w -- ) gforth
966 :	anton	1.1	:
967 :			r> r> drop >r ;
968 :
969 :	anton	1.65	2>r ( w1 w2 -- R:w1 R:w2 ) core-ext two_to_r
970 :	anton	1.1	:
971 :			swap r> swap >r swap >r >r ;
972 :
973 :	anton	1.65	2r> ( R:w1 R:w2 -- w1 w2 ) core-ext two_r_from
974 :	anton	1.1	:
975 :			r> r> swap r> swap >r swap ;
976 :
977 :	anton	1.65	2r@ ( R:w1 R:w2 -- R:w1 R:w2 w1 w2 ) core-ext two_r_fetch
978 :	anton	1.1	:
979 :			i' j ;
980 :
981 :	anton	1.65	2rdrop ( R:w1 R:w2 -- ) gforth two_r_drop
982 :	anton	1.1	:
983 :			r> r> drop r> drop >r ;
984 :
985 :	anton	1.47	over ( w1 w2 -- w1 w2 w1 ) core
986 :	anton	1.1	:
987 :			sp@ cell+ @ ;
988 :
989 :	anton	1.47	drop ( w -- ) core
990 :	anton	1.1	:
991 :			IF THEN ;
992 :
993 :	anton	1.47	swap ( w1 w2 -- w2 w1 ) core
994 :	anton	1.1	:
995 :			>r (swap) ! r> (swap) @ ;
996 :			Variable (swap)
997 :
998 :	anton	1.47	dup ( w -- w w ) core dupe
999 :	anton	1.1	:
1000 :			sp@ @ ;
1001 :
1002 :	anton	1.47	rot ( w1 w2 w3 -- w2 w3 w1 ) core rote
1003 :	anton	1.1	:
1004 :			[ defined? (swap) [IF] ]
1005 :			(swap) ! (rot) ! >r (rot) @ (swap) @ r> ;
1006 :			Variable (rot)
1007 :			[ELSE] ]
1008 :			>r swap r> swap ;
1009 :			[THEN]
1010 :
1011 :	anton	1.47	-rot ( w1 w2 w3 -- w3 w1 w2 ) gforth not_rote
1012 :	anton	1.1	:
1013 :			rot rot ;
1014 :
1015 :	anton	1.47	nip ( w1 w2 -- w2 ) core-ext
1016 :	anton	1.1	:
1017 :	jwilke	1.6	swap drop ;
1018 :	anton	1.1
1019 :	anton	1.47	tuck ( w1 w2 -- w2 w1 w2 ) core-ext
1020 :	anton	1.1	:
1021 :			swap over ;
1022 :
1023 :	anton	1.47	?dup ( w -- w ) core question_dupe
1024 :	anton	1.52	""Actually the stack effect is: @code{( w -- 0 \| w w )}. It performs a
1025 :			@code{dup} if w is nonzero.""
1026 :	anton	1.1	if (w!=0) {
1027 :	anton	1.64	IF_spTOS(*sp-- = w;)
1028 :	anton	1.1	#ifndef USE_TOS
1029 :			*--sp = w;
1030 :			#endif
1031 :			}
1032 :			:
1033 :			dup IF dup THEN ;
1034 :
1035 :	anton	1.47	pick ( u -- w ) core-ext
1036 :	anton	1.52	""Actually the stack effect is @code{ x0 ... xu u -- x0 ... xu x0 }.""
1037 :	anton	1.1	w = sp[u+1];
1038 :			:
1039 :			1+ cells sp@ + @ ;
1040 :
1041 :	anton	1.47	2drop ( w1 w2 -- ) core two_drop
1042 :	anton	1.1	:
1043 :			drop drop ;
1044 :
1045 :	anton	1.47	2dup ( w1 w2 -- w1 w2 w1 w2 ) core two_dupe
1046 :	anton	1.1	:
1047 :			over over ;
1048 :
1049 :	anton	1.47	2over ( w1 w2 w3 w4 -- w1 w2 w3 w4 w1 w2 ) core two_over
1050 :	anton	1.1	:
1051 :			3 pick 3 pick ;
1052 :
1053 :	anton	1.47	2swap ( w1 w2 w3 w4 -- w3 w4 w1 w2 ) core two_swap
1054 :	anton	1.1	:
1055 :			rot >r rot r> ;
1056 :
1057 :	anton	1.47	2rot ( w1 w2 w3 w4 w5 w6 -- w3 w4 w5 w6 w1 w2 ) double-ext two_rote
1058 :	anton	1.1	:
1059 :			>r >r 2swap r> r> 2swap ;
1060 :
1061 :	anton	1.47	2nip ( w1 w2 w3 w4 -- w3 w4 ) gforth two_nip
1062 :	anton	1.1	:
1063 :			2swap 2drop ;
1064 :
1065 :	anton	1.47	2tuck ( w1 w2 w3 w4 -- w3 w4 w1 w2 w3 w4 ) gforth two_tuck
1066 :	anton	1.1	:
1067 :			2swap 2over ;
1068 :
1069 :			\ toggle is high-level: 0.11/0.42%
1070 :
1071 :	anton	1.47	@ ( a_addr -- w ) core fetch
1072 :	anton	1.52	""@i{w} is the cell stored at @i{a_addr}.""
1073 :	anton	1.1	w = *a_addr;
1074 :
1075 :	anton	1.47	! ( w a_addr -- ) core store
1076 :	anton	1.52	""Store @i{w} into the cell at @i{a-addr}.""
1077 :	anton	1.1	*a_addr = w;
1078 :
1079 :	anton	1.47	+! ( n a_addr -- ) core plus_store
1080 :	anton	1.52	""Add @i{n} to the cell at @i{a-addr}.""
1081 :	anton	1.1	*a_addr += n;
1082 :			:
1083 :			tuck @ + swap ! ;
1084 :
1085 :	anton	1.47	c@ ( c_addr -- c ) core c_fetch
1086 :	anton	1.52	""@i{c} is the char stored at @i{c_addr}.""
1087 :	anton	1.1	c = *c_addr;
1088 :			:
1089 :			[ bigendian [IF] ]
1090 :			[ cell>bit 4 = [IF] ]
1091 :			dup [ 0 cell - ] Literal and @ swap 1 and
1092 :			IF $FF and ELSE 8>> THEN ;
1093 :			[ [ELSE] ]
1094 :			dup [ cell 1- ] literal and
1095 :			tuck - @ swap [ cell 1- ] literal xor
1096 :			0 ?DO 8>> LOOP $FF and
1097 :			[ [THEN] ]
1098 :			[ [ELSE] ]
1099 :			[ cell>bit 4 = [IF] ]
1100 :			dup [ 0 cell - ] Literal and @ swap 1 and
1101 :			IF 8>> ELSE $FF and THEN
1102 :			[ [ELSE] ]
1103 :			dup [ cell 1- ] literal and
1104 :			tuck - @ swap
1105 :			0 ?DO 8>> LOOP 255 and
1106 :			[ [THEN] ]
1107 :			[ [THEN] ]
1108 :			;
1109 :			: 8>> 2/ 2/ 2/ 2/ 2/ 2/ 2/ 2/ ;
1110 :
1111 :	anton	1.47	c! ( c c_addr -- ) core c_store
1112 :	anton	1.52	""Store @i{c} into the char at @i{c-addr}.""
1113 :	anton	1.1	*c_addr = c;
1114 :			:
1115 :			[ bigendian [IF] ]
1116 :			[ cell>bit 4 = [IF] ]
1117 :			tuck 1 and IF $FF and ELSE 8<< THEN >r
1118 :			dup -2 and @ over 1 and cells masks + @ and
1119 :			r> or swap -2 and ! ;
1120 :			Create masks $00FF , $FF00 ,
1121 :			[ELSE] ]
1122 :			dup [ cell 1- ] literal and dup
1123 :			[ cell 1- ] literal xor >r
1124 :			- dup @ $FF r@ 0 ?DO 8<< LOOP invert and
1125 :			rot $FF and r> 0 ?DO 8<< LOOP or swap ! ;
1126 :			[THEN]
1127 :			[ELSE] ]
1128 :			[ cell>bit 4 = [IF] ]
1129 :			tuck 1 and IF 8<< ELSE $FF and THEN >r
1130 :			dup -2 and @ over 1 and cells masks + @ and
1131 :			r> or swap -2 and ! ;
1132 :			Create masks $FF00 , $00FF ,
1133 :			[ELSE] ]
1134 :			dup [ cell 1- ] literal and dup >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 :			[THEN]
1139 :			: 8<< 2* 2* 2* 2* 2* 2* 2* 2* ;
1140 :
1141 :	anton	1.47	2! ( w1 w2 a_addr -- ) core two_store
1142 :	anton	1.52	""Store @i{w2} into the cell at @i{c-addr} and @i{w1} into the next cell.""
1143 :	anton	1.1	a_addr[0] = w2;
1144 :			a_addr[1] = w1;
1145 :			:
1146 :			tuck ! cell+ ! ;
1147 :
1148 :	anton	1.47	2@ ( a_addr -- w1 w2 ) core two_fetch
1149 :	anton	1.52	""@i{w2} is the content of the cell stored at @i{a-addr}, @i{w1} is
1150 :			the content of the next cell.""
1151 :	anton	1.1	w2 = a_addr[0];
1152 :			w1 = a_addr[1];
1153 :			:
1154 :			dup cell+ @ swap @ ;
1155 :
1156 :	anton	1.47	cell+ ( a_addr1 -- a_addr2 ) core cell_plus
1157 :	anton	1.52	""@code{1 cells +}""
1158 :	anton	1.1	a_addr2 = a_addr1+1;
1159 :			:
1160 :			cell + ;
1161 :
1162 :	anton	1.47	cells ( n1 -- n2 ) core
1163 :	anton	1.52	"" @i{n2} is the number of address units of @i{n1} cells.""
1164 :	anton	1.1	n2 = n1 * sizeof(Cell);
1165 :			:
1166 :			[ cell
1167 :			2/ dup [IF] ] 2* [ [THEN]
1168 :			2/ dup [IF] ] 2* [ [THEN]
1169 :			2/ dup [IF] ] 2* [ [THEN]
1170 :			2/ dup [IF] ] 2* [ [THEN]
1171 :			drop ] ;
1172 :
1173 :	anton	1.47	char+ ( c_addr1 -- c_addr2 ) core char_plus
1174 :	anton	1.52	""@code{1 chars +}.""
1175 :	anton	1.1	c_addr2 = c_addr1 + 1;
1176 :			:
1177 :			1+ ;
1178 :
1179 :	anton	1.47	(chars) ( n1 -- n2 ) gforth paren_chars
1180 :	anton	1.1	n2 = n1 * sizeof(Char);
1181 :			:
1182 :			;
1183 :
1184 :	anton	1.47	count ( c_addr1 -- c_addr2 u ) core
1185 :	anton	1.56	""@i{c-addr2} is the first character and @i{u} the length of the
1186 :			counted string at @i{c-addr1}.""
1187 :	anton	1.1	u = *c_addr1;
1188 :			c_addr2 = c_addr1+1;
1189 :			:
1190 :			dup 1+ swap c@ ;
1191 :
1192 :	anton	1.47	(f83find) ( c_addr u f83name1 -- f83name2 ) new paren_f83find
1193 :	pazsan	1.13	for (; f83name1 != NULL; f83name1 = (struct F83Name *)(f83name1->next))
1194 :	anton	1.1	if ((UCell)F83NAME_COUNT(f83name1)==u &&
1195 :			memcasecmp(c_addr, f83name1->name, u)== 0 /* or inline? */)
1196 :			break;
1197 :			f83name2=f83name1;
1198 :			:
1199 :			BEGIN dup WHILE (find-samelen) dup WHILE
1200 :			>r 2dup r@ cell+ char+ capscomp 0=
1201 :			IF 2drop r> EXIT THEN
1202 :			r> @
1203 :			REPEAT THEN nip nip ;
1204 :			: (find-samelen) ( u f83name1 -- u f83name2/0 )
1205 :	pazsan	1.72	BEGIN 2dup cell+ c@ $1F and <> WHILE @ dup 0= UNTIL THEN ;
1206 :	anton	1.1
1207 :	pazsan	1.15	\+hash
1208 :	anton	1.1
1209 :	anton	1.47	(hashfind) ( c_addr u a_addr -- f83name2 ) new paren_hashfind
1210 :	pazsan	1.13	struct F83Name *f83name1;
1211 :	anton	1.1	f83name2=NULL;
1212 :			while(a_addr != NULL)
1213 :			{
1214 :	pazsan	1.13	f83name1=(struct F83Name *)(a_addr[1]);
1215 :	anton	1.1	a_addr=(Cell *)(a_addr[0]);
1216 :			if ((UCell)F83NAME_COUNT(f83name1)==u &&
1217 :			memcasecmp(c_addr, f83name1->name, u)== 0 /* or inline? */)
1218 :			{
1219 :			f83name2=f83name1;
1220 :			break;
1221 :			}
1222 :			}
1223 :			:
1224 :			BEGIN dup WHILE
1225 :			2@ >r >r dup r@ cell+ c@ $1F and =
1226 :			IF 2dup r@ cell+ char+ capscomp 0=
1227 :			IF 2drop r> rdrop EXIT THEN THEN
1228 :			rdrop r>
1229 :			REPEAT nip nip ;
1230 :
1231 :	anton	1.47	(tablefind) ( c_addr u a_addr -- f83name2 ) new paren_tablefind
1232 :	anton	1.1	""A case-sensitive variant of @code{(hashfind)}""
1233 :	pazsan	1.13	struct F83Name *f83name1;
1234 :	anton	1.1	f83name2=NULL;
1235 :			while(a_addr != NULL)
1236 :			{
1237 :	pazsan	1.13	f83name1=(struct F83Name *)(a_addr[1]);
1238 :	anton	1.1	a_addr=(Cell *)(a_addr[0]);
1239 :			if ((UCell)F83NAME_COUNT(f83name1)==u &&
1240 :			memcmp(c_addr, f83name1->name, u)== 0 /* or inline? */)
1241 :			{
1242 :			f83name2=f83name1;
1243 :			break;
1244 :			}
1245 :			}
1246 :			:
1247 :			BEGIN dup WHILE
1248 :			2@ >r >r dup r@ cell+ c@ $1F and =
1249 :			IF 2dup r@ cell+ char+ -text 0=
1250 :			IF 2drop r> rdrop EXIT THEN THEN
1251 :			rdrop r>
1252 :			REPEAT nip nip ;
1253 :
1254 :	anton	1.47	(hashkey) ( c_addr u1 -- u2 ) gforth paren_hashkey
1255 :	anton	1.1	u2=0;
1256 :			while(u1--)
1257 :			u2+=(Cell)toupper(*c_addr++);
1258 :			:
1259 :			0 -rot bounds ?DO I c@ toupper + LOOP ;
1260 :
1261 :	anton	1.47	(hashkey1) ( c_addr u ubits -- ukey ) gforth paren_hashkey1
1262 :	anton	1.1	""ukey is the hash key for the string c_addr u fitting in ubits bits""
1263 :			/* this hash function rotates the key at every step by rot bits within
1264 :			ubits bits and xors it with the character. This function does ok in
1265 :			the chi-sqare-test. Rot should be <=7 (preferably <=5) for
1266 :			ASCII strings (larger if ubits is large), and should share no
1267 :			divisors with ubits.
1268 :			*/
1269 :			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];
1270 :			Char *cp = c_addr;
1271 :			for (ukey=0; cp<c_addr+u; cp++)
1272 :			ukey = ((((ukey<<rot) \| (ukey>>(ubits-rot)))
1273 :			^ toupper(*cp))
1274 :			& ((1<<ubits)-1));
1275 :			:
1276 :			dup rot-values + c@ over 1 swap lshift 1- >r
1277 :			tuck - 2swap r> 0 2swap bounds
1278 :			?DO dup 4 pick lshift swap 3 pick rshift or
1279 :			I c@ toupper xor
1280 :			over and LOOP
1281 :			nip nip nip ;
1282 :			Create rot-values
1283 :			5 c, 0 c, 1 c, 2 c, 3 c, 4 c, 5 c, 5 c, 5 c, 5 c,
1284 :			3 c, 5 c, 5 c, 5 c, 5 c, 7 c, 5 c, 5 c, 5 c, 5 c,
1285 :			7 c, 5 c, 5 c, 5 c, 5 c, 6 c, 5 c, 5 c, 5 c, 5 c,
1286 :			7 c, 5 c, 5 c,
1287 :
1288 :	pazsan	1.15	\+
1289 :	anton	1.1
1290 :	anton	1.47	(parse-white) ( c_addr1 u1 -- c_addr2 u2 ) gforth paren_parse_white
1291 :	anton	1.1	/* use !isgraph instead of isspace? */
1292 :			Char *endp = c_addr1+u1;
1293 :			while (c_addr1<endp && isspace(*c_addr1))
1294 :			c_addr1++;
1295 :			if (c_addr1<endp) {
1296 :			for (c_addr2 = c_addr1; c_addr1<endp && !isspace(*c_addr1); c_addr1++)
1297 :			;
1298 :			u2 = c_addr1-c_addr2;
1299 :			}
1300 :			else {
1301 :			c_addr2 = c_addr1;
1302 :			u2 = 0;
1303 :			}
1304 :			:
1305 :			BEGIN dup WHILE over c@ bl <= WHILE 1 /string
1306 :			REPEAT THEN 2dup
1307 :			BEGIN dup WHILE over c@ bl > WHILE 1 /string
1308 :			REPEAT THEN nip - ;
1309 :
1310 :	anton	1.47	aligned ( c_addr -- a_addr ) core
1311 :	crook	1.29	"" @i{a-addr} is the first aligned address greater than or equal to @i{c-addr}.""
1312 :	anton	1.1	a_addr = (Cell *)((((Cell)c_addr)+(sizeof(Cell)-1))&(-sizeof(Cell)));
1313 :			:
1314 :			[ cell 1- ] Literal + [ -1 cells ] Literal and ;
1315 :
1316 :	anton	1.47	faligned ( c_addr -- f_addr ) float f_aligned
1317 :	crook	1.29	"" @i{f-addr} is the first float-aligned address greater than or equal to @i{c-addr}.""
1318 :	anton	1.1	f_addr = (Float *)((((Cell)c_addr)+(sizeof(Float)-1))&(-sizeof(Float)));
1319 :			:
1320 :			[ 1 floats 1- ] Literal + [ -1 floats ] Literal and ;
1321 :
1322 :	anton	1.47	>body ( xt -- a_addr ) core to_body
1323 :	crook	1.40	"" Get the address of the body of the word represented by @i{xt} (the address
1324 :			of the word's data field).""
1325 :	anton	1.1	a_addr = PFA(xt);
1326 :			:
1327 :			2 cells + ;
1328 :
1329 :	jwilke	1.35	\ threading stuff is currently only interesting if we have a compiler
1330 :			\fhas? standardthreading has? compiler and [IF]
1331 :	jwilke	1.28
1332 :	anton	1.47	>code-address ( xt -- c_addr ) gforth to_code_address
1333 :	crook	1.29	""@i{c-addr} is the code address of the word @i{xt}.""
1334 :	anton	1.1	/* !! This behaves installation-dependently for DOES-words */
1335 :			c_addr = (Address)CODE_ADDRESS(xt);
1336 :			:
1337 :			@ ;
1338 :
1339 :	anton	1.47	>does-code ( xt -- a_addr ) gforth to_does_code
1340 :	anton	1.58	""If @i{xt} is the execution token of a child of a @code{DOES>} word,
1341 :	crook	1.29	@i{a-addr} is the start of the Forth code after the @code{DOES>};
1342 :			Otherwise @i{a-addr} is 0.""
1343 :	anton	1.1	a_addr = (Cell *)DOES_CODE(xt);
1344 :			:
1345 :			cell+ @ ;
1346 :
1347 :	anton	1.47	code-address! ( c_addr xt -- ) gforth code_address_store
1348 :	crook	1.29	""Create a code field with code address @i{c-addr} at @i{xt}.""
1349 :	anton	1.1	MAKE_CF(xt, c_addr);
1350 :	anton	1.10	CACHE_FLUSH(xt,(size_t)PFA(0));
1351 :	anton	1.1	:
1352 :			! ;
1353 :
1354 :	anton	1.47	does-code! ( a_addr xt -- ) gforth does_code_store
1355 :	anton	1.58	""Create a code field at @i{xt} for a child of a @code{DOES>}-word;
1356 :			@i{a-addr} is the start of the Forth code after @code{DOES>}.""
1357 :	anton	1.1	MAKE_DOES_CF(xt, a_addr);
1358 :	anton	1.10	CACHE_FLUSH(xt,(size_t)PFA(0));
1359 :	anton	1.1	:
1360 :			dodoes: over ! cell+ ! ;
1361 :
1362 :	anton	1.47	does-handler! ( a_addr -- ) gforth does_handler_store
1363 :	anton	1.58	""Create a @code{DOES>}-handler at address @i{a-addr}. Normally,
1364 :			@i{a-addr} points just behind a @code{DOES>}.""
1365 :	anton	1.1	MAKE_DOES_HANDLER(a_addr);
1366 :	anton	1.10	CACHE_FLUSH((caddr_t)a_addr,DOES_HANDLER_SIZE);
1367 :	anton	1.1	:
1368 :			drop ;
1369 :
1370 :	anton	1.47	/does-handler ( -- n ) gforth slash_does_handler
1371 :	crook	1.26	""The size of a @code{DOES>}-handler (includes possible padding).""
1372 :	anton	1.1	/* !! a constant or environmental query might be better */
1373 :			n = DOES_HANDLER_SIZE;
1374 :			:
1375 :			2 cells ;
1376 :
1377 :	anton	1.47	threading-method ( -- n ) gforth threading_method
1378 :	anton	1.1	""0 if the engine is direct threaded. Note that this may change during
1379 :			the lifetime of an image.""
1380 :			#if defined(DOUBLY_INDIRECT)
1381 :			n=2;
1382 :			#else
1383 :			# if defined(DIRECT_THREADED)
1384 :			n=0;
1385 :			# else
1386 :			n=1;
1387 :			# endif
1388 :			#endif
1389 :			:
1390 :			1 ;
1391 :	jwilke	1.28
1392 :	jwilke	1.35	\f[THEN]
1393 :	anton	1.1
1394 :	pazsan	1.83	\g hostos
1395 :
1396 :	anton	1.47	key-file ( wfileid -- n ) gforth paren_key_file
1397 :	pazsan	1.17	#ifdef HAS_FILE
1398 :	anton	1.1	fflush(stdout);
1399 :	pazsan	1.12	n = key((FILE*)wfileid);
1400 :	pazsan	1.17	#else
1401 :			n = key(stdin);
1402 :			#endif
1403 :	anton	1.1
1404 :	anton	1.47	key?-file ( wfileid -- n ) facility key_q_file
1405 :	pazsan	1.17	#ifdef HAS_FILE
1406 :	anton	1.1	fflush(stdout);
1407 :	pazsan	1.12	n = key_query((FILE*)wfileid);
1408 :	pazsan	1.17	#else
1409 :			n = key_query(stdin);
1410 :			#endif
1411 :
1412 :			\+os
1413 :	pazsan	1.12
1414 :	anton	1.47	stdin ( -- wfileid ) gforth
1415 :	pazsan	1.12	wfileid = (Cell)stdin;
1416 :	anton	1.1
1417 :	anton	1.47	stdout ( -- wfileid ) gforth
1418 :	anton	1.1	wfileid = (Cell)stdout;
1419 :
1420 :	anton	1.47	stderr ( -- wfileid ) gforth
1421 :	anton	1.1	wfileid = (Cell)stderr;
1422 :
1423 :	anton	1.47	form ( -- urows ucols ) gforth
1424 :	anton	1.1	""The number of lines and columns in the terminal. These numbers may change
1425 :			with the window size.""
1426 :			/* we could block SIGWINCH here to get a consistent size, but I don't
1427 :			think this is necessary or always beneficial */
1428 :			urows=rows;
1429 :			ucols=cols;
1430 :
1431 :	anton	1.47	flush-icache ( c_addr u -- ) gforth flush_icache
1432 :	anton	1.1	""Make sure that the instruction cache of the processor (if there is
1433 :	crook	1.29	one) does not contain stale data at @i{c-addr} and @i{u} bytes
1434 :	anton	1.1	afterwards. @code{END-CODE} performs a @code{flush-icache}
1435 :			automatically. Caveat: @code{flush-icache} might not work on your
1436 :			installation; this is usually the case if direct threading is not
1437 :			supported on your machine (take a look at your @file{machine.h}) and
1438 :			your machine has a separate instruction cache. In such cases,
1439 :			@code{flush-icache} does nothing instead of flushing the instruction
1440 :			cache.""
1441 :			FLUSH_ICACHE(c_addr,u);
1442 :
1443 :	anton	1.47	(bye) ( n -- ) gforth paren_bye
1444 :	anton	1.77	SUPER_END;
1445 :	anton	1.1	return (Label *)n;
1446 :
1447 :	anton	1.47	(system) ( c_addr u -- wretval wior ) gforth peren_system
1448 :	pazsan	1.20	#ifndef MSDOS
1449 :	anton	1.1	int old_tp=terminal_prepped;
1450 :			deprep_terminal();
1451 :	pazsan	1.20	#endif
1452 :	anton	1.1	wretval=system(cstr(c_addr,u,1)); /* ~ expansion on first part of string? */
1453 :			wior = IOR(wretval==-1 \|\| (wretval==127 && errno != 0));
1454 :	pazsan	1.20	#ifndef MSDOS
1455 :	anton	1.1	if (old_tp)
1456 :			prep_terminal();
1457 :	pazsan	1.20	#endif
1458 :	anton	1.1
1459 :	anton	1.47	getenv ( c_addr1 u1 -- c_addr2 u2 ) gforth
1460 :	crook	1.29	""The string @i{c-addr1 u1} specifies an environment variable. The string @i{c-addr2 u2}
1461 :	crook	1.24	is the host operating system's expansion of that environment variable. If the
1462 :	crook	1.29	environment variable does not exist, @i{c-addr2 u2} specifies a string 0 characters
1463 :	crook	1.24	in length.""
1464 :	pazsan	1.46	/* close ' to keep fontify happy */
1465 :	anton	1.1	c_addr2 = getenv(cstr(c_addr1,u1,1));
1466 :			u2 = (c_addr2 == NULL ? 0 : strlen(c_addr2));
1467 :
1468 :	anton	1.56	open-pipe ( c_addr u wfam -- wfileid wior ) gforth open_pipe
1469 :	pazsan	1.84	wfileid=(Cell)popen(cstr(c_addr,u,1),pfileattr[wfam]); /* ~ expansion of 1st arg? */
1470 :	anton	1.1	wior = IOR(wfileid==0); /* !! the man page says that errno is not set reliably */
1471 :
1472 :	anton	1.47	close-pipe ( wfileid -- wretval wior ) gforth close_pipe
1473 :	anton	1.1	wretval = pclose((FILE *)wfileid);
1474 :			wior = IOR(wretval==-1);
1475 :
1476 :	anton	1.47	time&date ( -- nsec nmin nhour nday nmonth nyear ) facility-ext time_and_date
1477 :	crook	1.44	""Report the current time of day. Seconds, minutes and hours are numbered from 0.
1478 :			Months are numbered from 1.""
1479 :	anton	1.1	struct timeval time1;
1480 :			struct timezone zone1;
1481 :			struct tm *ltime;
1482 :			gettimeofday(&time1,&zone1);
1483 :	anton	1.51	/* !! Single Unix specification:
1484 :			If tzp is not a null pointer, the behaviour is unspecified. */
1485 :	anton	1.1	ltime=localtime((time_t *)&time1.tv_sec);
1486 :			nyear =ltime->tm_year+1900;
1487 :			nmonth=ltime->tm_mon+1;
1488 :			nday =ltime->tm_mday;
1489 :			nhour =ltime->tm_hour;
1490 :			nmin =ltime->tm_min;
1491 :			nsec =ltime->tm_sec;
1492 :
1493 :	anton	1.47	ms ( n -- ) facility-ext
1494 :	crook	1.44	""Wait at least @i{n} milli-second.""
1495 :	anton	1.1	struct timeval timeout;
1496 :			timeout.tv_sec=n/1000;
1497 :			timeout.tv_usec=1000*(n%1000);
1498 :			(void)select(0,0,0,0,&timeout);
1499 :
1500 :	anton	1.47	allocate ( u -- a_addr wior ) memory
1501 :	crook	1.29	""Allocate @i{u} address units of contiguous data space. The initial
1502 :	crook	1.27	contents of the data space is undefined. If the allocation is successful,
1503 :	crook	1.29	@i{a-addr} is the start address of the allocated region and @i{wior}
1504 :			is 0. If the allocation fails, @i{a-addr} is undefined and @i{wior}
1505 :	anton	1.52	is a non-zero I/O result code.""
1506 :	anton	1.1	a_addr = (Cell *)malloc(u?u:1);
1507 :			wior = IOR(a_addr==NULL);
1508 :
1509 :	anton	1.47	free ( a_addr -- wior ) memory
1510 :	crook	1.29	""Return the region of data space starting at @i{a-addr} to the system.
1511 :	anton	1.52	The region must originally have been obtained using @code{allocate} or
1512 :	crook	1.29	@code{resize}. If the operational is successful, @i{wior} is 0.
1513 :	anton	1.52	If the operation fails, @i{wior} is a non-zero I/O result code.""
1514 :	anton	1.1	free(a_addr);
1515 :			wior = 0;
1516 :
1517 :	anton	1.47	resize ( a_addr1 u -- a_addr2 wior ) memory
1518 :	crook	1.26	""Change the size of the allocated area at @i{a-addr1} to @i{u}
1519 :	anton	1.1	address units, possibly moving the contents to a different
1520 :	crook	1.27	area. @i{a-addr2} is the address of the resulting area.
1521 :	anton	1.52	If the operation is successful, @i{wior} is 0.
1522 :			If the operation fails, @i{wior} is a non-zero
1523 :	crook	1.29	I/O result code. If @i{a-addr1} is 0, Gforth's (but not the Standard)
1524 :	crook	1.27	@code{resize} @code{allocate}s @i{u} address units.""
1525 :	anton	1.1	/* the following check is not necessary on most OSs, but it is needed
1526 :			on SunOS 4.1.2. */
1527 :	pazsan	1.46	/* close ' to keep fontify happy */
1528 :	anton	1.1	if (a_addr1==NULL)
1529 :			a_addr2 = (Cell *)malloc(u);
1530 :			else
1531 :			a_addr2 = (Cell *)realloc(a_addr1, u);
1532 :			wior = IOR(a_addr2==NULL); /* !! Define a return code */
1533 :
1534 :	anton	1.47	strerror ( n -- c_addr u ) gforth
1535 :	anton	1.1	c_addr = strerror(n);
1536 :			u = strlen(c_addr);
1537 :
1538 :	anton	1.47	strsignal ( n -- c_addr u ) gforth
1539 :	anton	1.1	c_addr = strsignal(n);
1540 :			u = strlen(c_addr);
1541 :
1542 :	anton	1.47	call-c ( w -- ) gforth call_c
1543 :	anton	1.1	""Call the C function pointed to by @i{w}. The C function has to
1544 :			access the stack itself. The stack pointers are exported in the global
1545 :			variables @code{SP} and @code{FP}.""
1546 :			/* This is a first attempt at support for calls to C. This may change in
1547 :			the future */
1548 :	anton	1.64	IF_fpTOS(fp[0]=fpTOS);
1549 :	anton	1.1	FP=fp;
1550 :			SP=sp;
1551 :			((void (*)())w)();
1552 :			sp=SP;
1553 :			fp=FP;
1554 :	anton	1.64	IF_spTOS(spTOS=sp[0]);
1555 :			IF_fpTOS(fpTOS=fp[0]);
1556 :	anton	1.1
1557 :	pazsan	1.15	\+
1558 :			\+file
1559 :	anton	1.1
1560 :	anton	1.47	close-file ( wfileid -- wior ) file close_file
1561 :	anton	1.1	wior = IOR(fclose((FILE *)wfileid)==EOF);
1562 :
1563 :	anton	1.56	open-file ( c_addr u wfam -- wfileid wior ) file open_file
1564 :			wfileid = (Cell)fopen(tilde_cstr(c_addr, u, 1), fileattr[wfam]);
1565 :	crook	1.22	wior = IOR(wfileid == 0);
1566 :	anton	1.1
1567 :	anton	1.56	create-file ( c_addr u wfam -- wfileid wior ) file create_file
1568 :	anton	1.1	Cell fd;
1569 :	anton	1.56	fd = open(tilde_cstr(c_addr, u, 1), O_CREAT\|O_TRUNC\|ufileattr[wfam], 0666);
1570 :	anton	1.1	if (fd != -1) {
1571 :	anton	1.56	wfileid = (Cell)fdopen(fd, fileattr[wfam]);
1572 :	crook	1.22	wior = IOR(wfileid == 0);
1573 :	anton	1.1	} else {
1574 :	crook	1.22	wfileid = 0;
1575 :	anton	1.1	wior = IOR(1);
1576 :			}
1577 :
1578 :	anton	1.47	delete-file ( c_addr u -- wior ) file delete_file
1579 :	anton	1.1	wior = IOR(unlink(tilde_cstr(c_addr, u, 1))==-1);
1580 :
1581 :	anton	1.47	rename-file ( c_addr1 u1 c_addr2 u2 -- wior ) file-ext rename_file
1582 :	crook	1.29	""Rename file @i{c_addr1 u1} to new name @i{c_addr2 u2}""
1583 :	anton	1.1	char *s1=tilde_cstr(c_addr2, u2, 1);
1584 :			wior = IOR(rename(tilde_cstr(c_addr1, u1, 0), s1)==-1);
1585 :
1586 :	anton	1.47	file-position ( wfileid -- ud wior ) file file_position
1587 :	anton	1.1	/* !! use tell and lseek? */
1588 :			ud = LONG2UD(ftell((FILE *)wfileid));
1589 :			wior = IOR(UD2LONG(ud)==-1);
1590 :
1591 :	anton	1.47	reposition-file ( ud wfileid -- wior ) file reposition_file
1592 :	anton	1.1	wior = IOR(fseek((FILE *)wfileid, UD2LONG(ud), SEEK_SET)==-1);
1593 :
1594 :	anton	1.47	file-size ( wfileid -- ud wior ) file file_size
1595 :	anton	1.1	struct stat buf;
1596 :			wior = IOR(fstat(fileno((FILE *)wfileid), &buf)==-1);
1597 :			ud = LONG2UD(buf.st_size);
1598 :
1599 :	anton	1.47	resize-file ( ud wfileid -- wior ) file resize_file
1600 :	anton	1.1	wior = IOR(ftruncate(fileno((FILE *)wfileid), UD2LONG(ud))==-1);
1601 :
1602 :	anton	1.47	read-file ( c_addr u1 wfileid -- u2 wior ) file read_file
1603 :	anton	1.1	/* !! fread does not guarantee enough */
1604 :			u2 = fread(c_addr, sizeof(Char), u1, (FILE *)wfileid);
1605 :			wior = FILEIO(u2<u1 && ferror((FILE *)wfileid));
1606 :			/* !! is the value of ferror errno-compatible? */
1607 :			if (wior)
1608 :			clearerr((FILE *)wfileid);
1609 :
1610 :	pazsan	1.60	read-line ( c_addr u1 wfileid -- u2 flag wior ) file read_line
1611 :			""this is only for backward compatibility""
1612 :	anton	1.1	Cell c;
1613 :			flag=-1;
1614 :			for(u2=0; u2<u1; u2++)
1615 :			{
1616 :	anton	1.45	c = getc((FILE *)wfileid);
1617 :			if (c=='\n') break;
1618 :			if (c=='\r') {
1619 :			if ((c = getc((FILE *)wfileid))!='\n')
1620 :			ungetc(c,(FILE *)wfileid);
1621 :			break;
1622 :			}
1623 :			if (c==EOF) {
1624 :	anton	1.1	flag=FLAG(u2!=0);
1625 :			break;
1626 :			}
1627 :	anton	1.45	c_addr[u2] = (Char)c;
1628 :	anton	1.1	}
1629 :			wior=FILEIO(ferror((FILE *)wfileid));
1630 :
1631 :	pazsan	1.15	\+
1632 :	anton	1.1
1633 :	anton	1.47	write-file ( c_addr u1 wfileid -- wior ) file write_file
1634 :	anton	1.1	/* !! fwrite does not guarantee enough */
1635 :	pazsan	1.39	#ifdef HAS_FILE
1636 :	anton	1.1	{
1637 :			UCell u2 = fwrite(c_addr, sizeof(Char), u1, (FILE *)wfileid);
1638 :			wior = FILEIO(u2<u1 && ferror((FILE *)wfileid));
1639 :			if (wior)
1640 :			clearerr((FILE *)wfileid);
1641 :			}
1642 :	pazsan	1.39	#else
1643 :			TYPE(c_addr, u1);
1644 :			#endif
1645 :	pazsan	1.17
1646 :	anton	1.47	emit-file ( c wfileid -- wior ) gforth emit_file
1647 :	pazsan	1.17	#ifdef HAS_FILE
1648 :	anton	1.1	wior = FILEIO(putc(c, (FILE *)wfileid)==EOF);
1649 :			if (wior)
1650 :			clearerr((FILE *)wfileid);
1651 :	pazsan	1.17	#else
1652 :	pazsan	1.36	PUTC(c);
1653 :	pazsan	1.17	#endif
1654 :	anton	1.1
1655 :	pazsan	1.15	\+file
1656 :	anton	1.1
1657 :	anton	1.47	flush-file ( wfileid -- wior ) file-ext flush_file
1658 :	anton	1.1	wior = IOR(fflush((FILE *) wfileid)==EOF);
1659 :
1660 :	anton	1.56	file-status ( c_addr u -- wfam wior ) file-ext file_status
1661 :	anton	1.1	char *filename=tilde_cstr(c_addr, u, 1);
1662 :			if (access (filename, F_OK) != 0) {
1663 :	anton	1.56	wfam=0;
1664 :	anton	1.1	wior=IOR(1);
1665 :			}
1666 :			else if (access (filename, R_OK \| W_OK) == 0) {
1667 :	anton	1.56	wfam=2; /* r/w */
1668 :	anton	1.1	wior=0;
1669 :			}
1670 :			else if (access (filename, R_OK) == 0) {
1671 :	anton	1.56	wfam=0; /* r/o */
1672 :	anton	1.1	wior=0;
1673 :			}
1674 :			else if (access (filename, W_OK) == 0) {
1675 :	anton	1.56	wfam=4; /* w/o */
1676 :	anton	1.1	wior=0;
1677 :			}
1678 :			else {
1679 :	anton	1.56	wfam=1; /* well, we cannot access the file, but better deliver a legal
1680 :	anton	1.1	access mode (r/o bin), so we get a decent error later upon open. */
1681 :			wior=0;
1682 :			}
1683 :
1684 :	pazsan	1.15	\+
1685 :			\+floating
1686 :	anton	1.1
1687 :	pazsan	1.83	\g floating
1688 :
1689 :	anton	1.1	comparisons(f, r1 r2, f_, r1, r2, gforth, gforth, float, gforth)
1690 :			comparisons(f0, r, f_zero_, r, 0., float, gforth, float, gforth)
1691 :
1692 :	anton	1.47	d>f ( d -- r ) float d_to_f
1693 :	anton	1.1	#ifdef BUGGY_LONG_LONG
1694 :			extern double ldexp(double x, int exp);
1695 :			r = ldexp((Float)d.hi,CELL_BITS) + (Float)d.lo;
1696 :			#else
1697 :			r = d;
1698 :			#endif
1699 :
1700 :	anton	1.47	f>d ( r -- d ) float f_to_d
1701 :	anton	1.1	#ifdef BUGGY_LONG_LONG
1702 :	anton	1.21	d.hi = ldexp(r,-(int)(CELL_BITS)) - (r<0);
1703 :	anton	1.1	d.lo = r-ldexp((Float)d.hi,CELL_BITS);
1704 :			#else
1705 :			d = r;
1706 :			#endif
1707 :
1708 :	anton	1.47	f! ( r f_addr -- ) float f_store
1709 :	anton	1.52	""Store @i{r} into the float at address @i{f-addr}.""
1710 :	anton	1.1	*f_addr = r;
1711 :
1712 :	anton	1.47	f@ ( f_addr -- r ) float f_fetch
1713 :	anton	1.52	""@i{r} is the float at address @i{f-addr}.""
1714 :	anton	1.1	r = *f_addr;
1715 :
1716 :	anton	1.47	df@ ( df_addr -- r ) float-ext d_f_fetch
1717 :	anton	1.52	""Fetch the double-precision IEEE floating-point value @i{r} from the address @i{df-addr}.""
1718 :	anton	1.1	#ifdef IEEE_FP
1719 :			r = *df_addr;
1720 :			#else
1721 :			!! df@
1722 :			#endif
1723 :
1724 :	anton	1.47	df! ( r df_addr -- ) float-ext d_f_store
1725 :	anton	1.52	""Store @i{r} as double-precision IEEE floating-point value to the
1726 :			address @i{df-addr}.""
1727 :	anton	1.1	#ifdef IEEE_FP
1728 :			*df_addr = r;
1729 :			#else
1730 :			!! df!
1731 :			#endif
1732 :
1733 :	anton	1.47	sf@ ( sf_addr -- r ) float-ext s_f_fetch
1734 :	anton	1.52	""Fetch the single-precision IEEE floating-point value @i{r} from the address @i{sf-addr}.""
1735 :	anton	1.1	#ifdef IEEE_FP
1736 :			r = *sf_addr;
1737 :			#else
1738 :			!! sf@
1739 :			#endif
1740 :
1741 :	anton	1.47	sf! ( r sf_addr -- ) float-ext s_f_store
1742 :	anton	1.52	""Store @i{r} as single-precision IEEE floating-point value to the
1743 :			address @i{sf-addr}.""
1744 :	anton	1.1	#ifdef IEEE_FP
1745 :			*sf_addr = r;
1746 :			#else
1747 :			!! sf!
1748 :			#endif
1749 :
1750 :	anton	1.47	f+ ( r1 r2 -- r3 ) float f_plus
1751 :	anton	1.1	r3 = r1+r2;
1752 :
1753 :	anton	1.47	f- ( r1 r2 -- r3 ) float f_minus
1754 :	anton	1.1	r3 = r1-r2;
1755 :
1756 :	anton	1.47	f* ( r1 r2 -- r3 ) float f_star
1757 :	anton	1.1	r3 = r1*r2;
1758 :
1759 :	anton	1.47	f/ ( r1 r2 -- r3 ) float f_slash
1760 :	anton	1.1	r3 = r1/r2;
1761 :
1762 :	anton	1.47	f** ( r1 r2 -- r3 ) float-ext f_star_star
1763 :	crook	1.26	""@i{r3} is @i{r1} raised to the @i{r2}th power.""
1764 :	anton	1.1	r3 = pow(r1,r2);
1765 :
1766 :	anton	1.47	fnegate ( r1 -- r2 ) float f_negate
1767 :	anton	1.1	r2 = - r1;
1768 :
1769 :	anton	1.47	fdrop ( r -- ) float f_drop
1770 :	anton	1.1
1771 :	anton	1.47	fdup ( r -- r r ) float f_dupe
1772 :	anton	1.1
1773 :	anton	1.47	fswap ( r1 r2 -- r2 r1 ) float f_swap
1774 :	anton	1.1
1775 :	anton	1.47	fover ( r1 r2 -- r1 r2 r1 ) float f_over
1776 :	anton	1.1
1777 :	anton	1.47	frot ( r1 r2 r3 -- r2 r3 r1 ) float f_rote
1778 :	anton	1.1
1779 :	anton	1.47	fnip ( r1 r2 -- r2 ) gforth f_nip
1780 :	anton	1.1
1781 :	anton	1.47	ftuck ( r1 r2 -- r2 r1 r2 ) gforth f_tuck
1782 :	anton	1.1
1783 :	anton	1.47	float+ ( f_addr1 -- f_addr2 ) float float_plus
1784 :	anton	1.52	""@code{1 floats +}.""
1785 :	anton	1.1	f_addr2 = f_addr1+1;
1786 :
1787 :	anton	1.47	floats ( n1 -- n2 ) float
1788 :	anton	1.52	""@i{n2} is the number of address units of @i{n1} floats.""
1789 :	anton	1.1	n2 = n1*sizeof(Float);
1790 :
1791 :	anton	1.47	floor ( r1 -- r2 ) float
1792 :	crook	1.26	""Round towards the next smaller integral value, i.e., round toward negative infinity.""
1793 :	anton	1.1	/* !! unclear wording */
1794 :			r2 = floor(r1);
1795 :
1796 :	anton	1.47	fround ( r1 -- r2 ) float f_round
1797 :	crook	1.26	""Round to the nearest integral value.""
1798 :	anton	1.1	/* !! unclear wording */
1799 :			#ifdef HAVE_RINT
1800 :			r2 = rint(r1);
1801 :			#else
1802 :			r2 = floor(r1+0.5);
1803 :			/* !! This is not quite true to the rounding rules given in the standard */
1804 :			#endif
1805 :
1806 :	anton	1.47	fmax ( r1 r2 -- r3 ) float f_max
1807 :	anton	1.1	if (r1<r2)
1808 :			r3 = r2;
1809 :			else
1810 :			r3 = r1;
1811 :
1812 :	anton	1.47	fmin ( r1 r2 -- r3 ) float f_min
1813 :	anton	1.1	if (r1<r2)
1814 :			r3 = r1;
1815 :			else
1816 :			r3 = r2;
1817 :
1818 :	anton	1.47	represent ( r c_addr u -- n f1 f2 ) float
1819 :	anton	1.1	char *sig;
1820 :			int flag;
1821 :			int decpt;
1822 :			sig=ecvt(r, u, &decpt, &flag);
1823 :			n=(r==0 ? 1 : decpt);
1824 :			f1=FLAG(flag!=0);
1825 :	anton	1.21	f2=FLAG(isdigit((unsigned)(sig[0]))!=0);
1826 :	anton	1.1	memmove(c_addr,sig,u);
1827 :
1828 :	anton	1.47	>float ( c_addr u -- flag ) float to_float
1829 :	anton	1.56	""Actual stack effect: ( c_addr u -- r t \| f ). Attempt to convert the
1830 :			character string @i{c-addr u} to internal floating-point
1831 :			representation. If the string represents a valid floating-point number
1832 :			@i{r} is placed on the floating-point stack and @i{flag} is
1833 :			true. Otherwise, @i{flag} is false. A string of blanks is a special
1834 :			case and represents the floating-point number 0.""
1835 :	anton	1.1	/* real signature: c_addr u -- r t / f */
1836 :			Float r;
1837 :			char *number=cstr(c_addr, u, 1);
1838 :			char *endconv;
1839 :	pazsan	1.42	int sign = 0;
1840 :			if(number[0]=='-') {
1841 :			sign = 1;
1842 :			number++;
1843 :			u--;
1844 :			}
1845 :	anton	1.21	while(isspace((unsigned)(number[--u])) && u>0);
1846 :	anton	1.1	switch(number[u])
1847 :			{
1848 :			case 'd':
1849 :			case 'D':
1850 :			case 'e':
1851 :			case 'E': break;
1852 :			default : u++; break;
1853 :			}
1854 :			number[u]='\0';
1855 :			r=strtod(number,&endconv);
1856 :			if((flag=FLAG(!(Cell)*endconv)))
1857 :			{
1858 :	anton	1.64	IF_fpTOS(fp[0] = fpTOS);
1859 :	anton	1.1	fp += -1;
1860 :	anton	1.64	fpTOS = sign ? -r : r;
1861 :	anton	1.1	}
1862 :			else if(endconv=='d' \|\| endconv=='D')
1863 :			{
1864 :			*endconv='E';
1865 :			r=strtod(number,&endconv);
1866 :			if((flag=FLAG(!(Cell)*endconv)))
1867 :			{
1868 :	anton	1.64	IF_fpTOS(fp[0] = fpTOS);
1869 :	anton	1.1	fp += -1;
1870 :	anton	1.64	fpTOS = sign ? -r : r;
1871 :	anton	1.1	}
1872 :			}
1873 :
1874 :	anton	1.47	fabs ( r1 -- r2 ) float-ext f_abs
1875 :	anton	1.1	r2 = fabs(r1);
1876 :
1877 :	anton	1.47	facos ( r1 -- r2 ) float-ext f_a_cos
1878 :	anton	1.1	r2 = acos(r1);
1879 :
1880 :	anton	1.47	fasin ( r1 -- r2 ) float-ext f_a_sine
1881 :	anton	1.1	r2 = asin(r1);
1882 :
1883 :	anton	1.47	fatan ( r1 -- r2 ) float-ext f_a_tan
1884 :	anton	1.1	r2 = atan(r1);
1885 :
1886 :	anton	1.47	fatan2 ( r1 r2 -- r3 ) float-ext f_a_tan_two
1887 :	crook	1.26	""@i{r1/r2}=tan(@i{r3}). ANS Forth does not require, but probably
1888 :	anton	1.1	intends this to be the inverse of @code{fsincos}. In gforth it is.""
1889 :			r3 = atan2(r1,r2);
1890 :
1891 :	anton	1.47	fcos ( r1 -- r2 ) float-ext f_cos
1892 :	anton	1.1	r2 = cos(r1);
1893 :
1894 :	anton	1.47	fexp ( r1 -- r2 ) float-ext f_e_x_p
1895 :	anton	1.1	r2 = exp(r1);
1896 :
1897 :	anton	1.47	fexpm1 ( r1 -- r2 ) float-ext f_e_x_p_m_one
1898 :	anton	1.1	""@i{r2}=@i{e}**@i{r1}@minus{}1""
1899 :			#ifdef HAVE_EXPM1
1900 :	pazsan	1.3	extern double
1901 :			#ifdef NeXT
1902 :			const
1903 :			#endif
1904 :			expm1(double);
1905 :	anton	1.1	r2 = expm1(r1);
1906 :			#else
1907 :			r2 = exp(r1)-1.;
1908 :			#endif
1909 :
1910 :	anton	1.47	fln ( r1 -- r2 ) float-ext f_l_n
1911 :	anton	1.1	r2 = log(r1);
1912 :
1913 :	anton	1.47	flnp1 ( r1 -- r2 ) float-ext f_l_n_p_one
1914 :	anton	1.1	""@i{r2}=ln(@i{r1}+1)""
1915 :			#ifdef HAVE_LOG1P
1916 :	pazsan	1.3	extern double
1917 :			#ifdef NeXT
1918 :			const
1919 :			#endif
1920 :			log1p(double);
1921 :	anton	1.1	r2 = log1p(r1);
1922 :			#else
1923 :			r2 = log(r1+1.);
1924 :			#endif
1925 :
1926 :	anton	1.47	flog ( r1 -- r2 ) float-ext f_log
1927 :	crook	1.26	""The decimal logarithm.""
1928 :	anton	1.1	r2 = log10(r1);
1929 :
1930 :	anton	1.47	falog ( r1 -- r2 ) float-ext f_a_log
1931 :	anton	1.1	""@i{r2}=10**@i{r1}""
1932 :			extern double pow10(double);
1933 :			r2 = pow10(r1);
1934 :
1935 :	anton	1.47	fsin ( r1 -- r2 ) float-ext f_sine
1936 :	anton	1.1	r2 = sin(r1);
1937 :
1938 :	anton	1.47	fsincos ( r1 -- r2 r3 ) float-ext f_sine_cos
1939 :	anton	1.1	""@i{r2}=sin(@i{r1}), @i{r3}=cos(@i{r1})""
1940 :			r2 = sin(r1);
1941 :			r3 = cos(r1);
1942 :
1943 :	anton	1.47	fsqrt ( r1 -- r2 ) float-ext f_square_root
1944 :	anton	1.1	r2 = sqrt(r1);
1945 :
1946 :	anton	1.47	ftan ( r1 -- r2 ) float-ext f_tan
1947 :	anton	1.1	r2 = tan(r1);
1948 :			:
1949 :			fsincos f/ ;
1950 :
1951 :	anton	1.47	fsinh ( r1 -- r2 ) float-ext f_cinch
1952 :	anton	1.1	r2 = sinh(r1);
1953 :			:
1954 :			fexpm1 fdup fdup 1. d>f f+ f/ f+ f2/ ;
1955 :
1956 :	anton	1.47	fcosh ( r1 -- r2 ) float-ext f_cosh
1957 :	anton	1.1	r2 = cosh(r1);
1958 :			:
1959 :			fexp fdup 1/f f+ f2/ ;
1960 :
1961 :	anton	1.47	ftanh ( r1 -- r2 ) float-ext f_tan_h
1962 :	anton	1.1	r2 = tanh(r1);
1963 :			:
1964 :			f2* fexpm1 fdup 2. d>f f+ f/ ;
1965 :
1966 :	anton	1.47	fasinh ( r1 -- r2 ) float-ext f_a_cinch
1967 :	anton	1.1	r2 = asinh(r1);
1968 :			:
1969 :			fdup fdup f* 1. d>f f+ fsqrt f/ fatanh ;
1970 :
1971 :	anton	1.47	facosh ( r1 -- r2 ) float-ext f_a_cosh
1972 :	anton	1.1	r2 = acosh(r1);
1973 :			:
1974 :			fdup fdup f* 1. d>f f- fsqrt f+ fln ;
1975 :
1976 :	anton	1.47	fatanh ( r1 -- r2 ) float-ext f_a_tan_h
1977 :	anton	1.1	r2 = atanh(r1);
1978 :			:
1979 :			fdup f0< >r fabs 1. d>f fover f- f/ f2* flnp1 f2/
1980 :			r> IF fnegate THEN ;
1981 :
1982 :	anton	1.47	sfloats ( n1 -- n2 ) float-ext s_floats
1983 :	anton	1.52	""@i{n2} is the number of address units of @i{n1}
1984 :	crook	1.29	single-precision IEEE floating-point numbers.""
1985 :	anton	1.1	n2 = n1*sizeof(SFloat);
1986 :
1987 :	anton	1.47	dfloats ( n1 -- n2 ) float-ext d_floats
1988 :	anton	1.52	""@i{n2} is the number of address units of @i{n1}
1989 :	crook	1.29	double-precision IEEE floating-point numbers.""
1990 :	anton	1.1	n2 = n1*sizeof(DFloat);
1991 :
1992 :	anton	1.47	sfaligned ( c_addr -- sf_addr ) float-ext s_f_aligned
1993 :	anton	1.52	""@i{sf-addr} is the first single-float-aligned address greater
1994 :	crook	1.29	than or equal to @i{c-addr}.""
1995 :	anton	1.1	sf_addr = (SFloat *)((((Cell)c_addr)+(sizeof(SFloat)-1))&(-sizeof(SFloat)));
1996 :			:
1997 :			[ 1 sfloats 1- ] Literal + [ -1 sfloats ] Literal and ;
1998 :
1999 :	anton	1.47	dfaligned ( c_addr -- df_addr ) float-ext d_f_aligned
2000 :	anton	1.52	""@i{df-addr} is the first double-float-aligned address greater
2001 :	crook	1.29	than or equal to @i{c-addr}.""
2002 :	anton	1.1	df_addr = (DFloat *)((((Cell)c_addr)+(sizeof(DFloat)-1))&(-sizeof(DFloat)));
2003 :			:
2004 :			[ 1 dfloats 1- ] Literal + [ -1 dfloats ] Literal and ;
2005 :
2006 :			\ The following words access machine/OS/installation-dependent
2007 :			\ Gforth internals
2008 :			\ !! how about environmental queries DIRECT-THREADED,
2009 :			\ INDIRECT-THREADED, TOS-CACHED, FTOS-CACHED, CODEFIELD-DOES */
2010 :
2011 :			\ local variable implementation primitives
2012 :	pazsan	1.15	\+
2013 :			\+glocals
2014 :	anton	1.1
2015 :	anton	1.68	@local# ( #noffset -- w ) gforth fetch_local_number
2016 :			w = (Cell )(lp+noffset);
2017 :	anton	1.1
2018 :	anton	1.47	@local0 ( -- w ) new fetch_local_zero
2019 :	anton	1.1	w = (Cell )(lp+0*sizeof(Cell));
2020 :
2021 :	anton	1.47	@local1 ( -- w ) new fetch_local_four
2022 :	anton	1.1	w = (Cell )(lp+1*sizeof(Cell));
2023 :
2024 :	anton	1.47	@local2 ( -- w ) new fetch_local_eight
2025 :	anton	1.1	w = (Cell )(lp+2*sizeof(Cell));
2026 :
2027 :	anton	1.47	@local3 ( -- w ) new fetch_local_twelve
2028 :	anton	1.1	w = (Cell )(lp+3*sizeof(Cell));
2029 :
2030 :	pazsan	1.15	\+floating
2031 :	anton	1.1
2032 :	anton	1.68	f@local# ( #noffset -- r ) gforth f_fetch_local_number
2033 :			r = (Float )(lp+noffset);
2034 :	anton	1.1
2035 :	anton	1.47	f@local0 ( -- r ) new f_fetch_local_zero
2036 :	anton	1.1	r = (Float )(lp+0*sizeof(Float));
2037 :
2038 :	anton	1.47	f@local1 ( -- r ) new f_fetch_local_eight
2039 :	anton	1.1	r = (Float )(lp+1*sizeof(Float));
2040 :
2041 :	pazsan	1.15	\+
2042 :	anton	1.1
2043 :	anton	1.68	laddr# ( #noffset -- c_addr ) gforth laddr_number
2044 :	anton	1.1	/* this can also be used to implement lp@ */
2045 :	anton	1.68	c_addr = (Char *)(lp+noffset);
2046 :	anton	1.1
2047 :	anton	1.68	lp+!# ( #noffset -- ) gforth lp_plus_store_number
2048 :	anton	1.1	""used with negative immediate values it allocates memory on the
2049 :			local stack, a positive immediate argument drops memory from the local
2050 :			stack""
2051 :	anton	1.68	lp += noffset;
2052 :	anton	1.1
2053 :	anton	1.47	lp- ( -- ) new minus_four_lp_plus_store
2054 :	anton	1.1	lp += -sizeof(Cell);
2055 :
2056 :	anton	1.47	lp+ ( -- ) new eight_lp_plus_store
2057 :	anton	1.1	lp += sizeof(Float);
2058 :
2059 :	anton	1.47	lp+2 ( -- ) new sixteen_lp_plus_store
2060 :	anton	1.1	lp += 2*sizeof(Float);
2061 :
2062 :	anton	1.47	lp! ( c_addr -- ) gforth lp_store
2063 :	anton	1.1	lp = (Address)c_addr;
2064 :
2065 :	anton	1.47	>l ( w -- ) gforth to_l
2066 :	anton	1.1	lp -= sizeof(Cell);
2067 :			(Cell )lp = w;
2068 :
2069 :	pazsan	1.15	\+floating
2070 :	anton	1.1
2071 :	anton	1.47	f>l ( r -- ) gforth f_to_l
2072 :	anton	1.1	lp -= sizeof(Float);
2073 :			(Float )lp = r;
2074 :
2075 :	anton	1.47	fpick ( u -- r ) gforth
2076 :	anton	1.52	""Actually the stack effect is @code{ r0 ... ru u -- r0 ... ru r0 }.""
2077 :	anton	1.11	r = fp[u+1]; /* +1, because update of fp happens before this fragment */
2078 :			:
2079 :			floats fp@ + f@ ;
2080 :
2081 :	pazsan	1.15	\+
2082 :			\+
2083 :	anton	1.1
2084 :	pazsan	1.15	\+OS
2085 :	anton	1.1
2086 :			define(`uploop',
2087 :			`pushdef(`$1', `$2')_uploop(`$1', `$2', `$3', `$4', `$5')`'popdef(`$1')')
2088 :			define(`_uploop',
2089 :			`ifelse($1, `$3', `$5',
2090 :			`$4`'define(`$1', incr($1))_uploop(`$1', `$2', `$3', `$4', `$5')')')
2091 :			\ argflist(argnum): Forth argument list
2092 :			define(argflist,
2093 :			`ifelse($1, 0, `',
2094 :			`uploop(`_i', 1, $1, `format(`u%d ', _i)', `format(`u%d ', _i)')')')
2095 :			\ argdlist(argnum): declare C's arguments
2096 :			define(argdlist,
2097 :			`ifelse($1, 0, `',
2098 :			`uploop(`_i', 1, $1, `Cell, ', `Cell')')')
2099 :			\ argclist(argnum): pass C's arguments
2100 :			define(argclist,
2101 :			`ifelse($1, 0, `',
2102 :			`uploop(`_i', 1, $1, `format(`u%d, ', _i)', `format(`u%d', _i)')')')
2103 :			\ icall(argnum)
2104 :			define(icall,
2105 :	anton	1.47	`icall$1 ( argflist($1)u -- uret ) gforth
2106 :	pazsan	1.9	uret = (SYSCALL(Cell(*)(argdlist($1)))u)(argclist($1));
2107 :	anton	1.1
2108 :			')
2109 :			define(fcall,
2110 :	anton	1.47	`fcall$1 ( argflist($1)u -- rret ) gforth
2111 :	pazsan	1.9	rret = (SYSCALL(Float(*)(argdlist($1)))u)(argclist($1));
2112 :	anton	1.1
2113 :			')
2114 :
2115 :	pazsan	1.46	\ close ' to keep fontify happy
2116 :	anton	1.1
2117 :	anton	1.47	open-lib ( c_addr1 u1 -- u2 ) gforth open_lib
2118 :	anton	1.1	#if defined(HAVE_LIBDL) \|\| defined(HAVE_DLOPEN)
2119 :	anton	1.8	#ifndef RTLD_GLOBAL
2120 :			#define RTLD_GLOBAL 0
2121 :			#endif
2122 :	pazsan	1.7	u2=(UCell) dlopen(cstr(c_addr1, u1, 1), RTLD_GLOBAL \| RTLD_LAZY);
2123 :	anton	1.1	#else
2124 :	pazsan	1.18	# ifdef _WIN32
2125 :	anton	1.1	u2 = (Cell) GetModuleHandle(cstr(c_addr1, u1, 1));
2126 :			# else
2127 :			#warning Define open-lib!
2128 :			u2 = 0;
2129 :			# endif
2130 :			#endif
2131 :
2132 :	anton	1.47	lib-sym ( c_addr1 u1 u2 -- u3 ) gforth lib_sym
2133 :	anton	1.1	#if defined(HAVE_LIBDL) \|\| defined(HAVE_DLOPEN)
2134 :			u3 = (UCell) dlsym((void*)u2,cstr(c_addr1, u1, 1));
2135 :			#else
2136 :	pazsan	1.18	# ifdef _WIN32
2137 :	anton	1.1	u3 = (Cell) GetProcAddress((HMODULE)u2, cstr(c_addr1, u1, 1));
2138 :			# else
2139 :			#warning Define lib-sym!
2140 :			u3 = 0;
2141 :			# endif
2142 :			#endif
2143 :
2144 :			uploop(i, 0, 7, `icall(i)')
2145 :			icall(20)
2146 :			uploop(i, 0, 7, `fcall(i)')
2147 :			fcall(20)
2148 :
2149 :	pazsan	1.15	\+
2150 :	anton	1.1
2151 :	anton	1.47	up! ( a_addr -- ) gforth up_store
2152 :	anton	1.1	UP=up=(char *)a_addr;
2153 :			:
2154 :			up ! ;
2155 :			Variable UP
2156 :	jwilke	1.34
2157 :	anton	1.47	wcall ( u -- ) gforth
2158 :	anton	1.64	IF_fpTOS(fp[0]=fpTOS);
2159 :	jwilke	1.34	FP=fp;
2160 :	pazsan	1.81	sp=(Cell)(SYSCALL(Cell()(Cell , void ))u)(sp, &FP);
2161 :	jwilke	1.34	fp=FP;
2162 :	anton	1.64	IF_spTOS(spTOS=sp[0];)
2163 :			IF_fpTOS(fpTOS=fp[0]);
2164 :	pazsan	1.46
2165 :			\+file
2166 :
2167 :	anton	1.47	open-dir ( c_addr u -- wdirid wior ) gforth open_dir
2168 :	pazsan	1.46	wdirid = (Cell)opendir(tilde_cstr(c_addr, u, 1));
2169 :			wior = IOR(wdirid == 0);
2170 :
2171 :	anton	1.47	read-dir ( c_addr u1 wdirid -- u2 flag wior ) gforth read_dir
2172 :	pazsan	1.46	struct dirent * dent;
2173 :			dent = readdir((DIR *)wdirid);
2174 :			wior = 0;
2175 :			flag = -1;
2176 :			if(dent == NULL) {
2177 :			u2 = 0;
2178 :			flag = 0;
2179 :			} else {
2180 :			u2 = strlen(dent->d_name);
2181 :	pazsan	1.70	if(u2 > u1) {
2182 :	pazsan	1.46	u2 = u1;
2183 :	pazsan	1.70	wior = -512-ENAMETOOLONG;
2184 :			}
2185 :	pazsan	1.46	memmove(c_addr, dent->d_name, u2);
2186 :			}
2187 :
2188 :	anton	1.47	close-dir ( wdirid -- wior ) gforth close_dir
2189 :	pazsan	1.46	wior = IOR(closedir((DIR *)wdirid));
2190 :
2191 :	anton	1.47	filename-match ( c_addr1 u1 c_addr2 u2 -- flag ) gforth match_file
2192 :	pazsan	1.46	char * string = cstr(c_addr1, u1, 1);
2193 :			char * pattern = cstr(c_addr2, u2, 0);
2194 :			flag = FLAG(!fnmatch(pattern, string, 0));
2195 :
2196 :			\+
2197 :	jwilke	1.34
2198 :	anton	1.47	newline ( -- c_addr u ) gforth
2199 :	anton	1.45	""String containing the newline sequence of the host OS""
2200 :			char newline[] = {
2201 :	anton	1.69	#if defined(unix) \|\| defined(__MACH__)
2202 :			/* Darwin/MacOS X sets __MACH__, but not unix. */
2203 :	anton	1.45	'\n'
2204 :			#else
2205 :			'\r','\n'
2206 :			#endif
2207 :			};
2208 :			c_addr=newline;
2209 :			u=sizeof(newline);
2210 :	pazsan	1.49	:
2211 :			"newline count ;
2212 :	pazsan	1.54	Create "newline e? crlf [IF] 2 c, $0D c, [ELSE] 1 c, [THEN] $0A c,
2213 :
2214 :			\+os
2215 :	anton	1.51
2216 :			utime ( -- dtime ) gforth
2217 :			""Report the current time in microseconds since some epoch.""
2218 :			struct timeval time1;
2219 :			gettimeofday(&time1,NULL);
2220 :			dtime = timeval2us(&time1);
2221 :
2222 :			cputime ( -- duser dsystem ) gforth
2223 :			""duser and dsystem are the respective user- and system-level CPU
2224 :			times used since the start of the Forth system (excluding child
2225 :			processes), in microseconds (the granularity may be much larger,
2226 :			however). On platforms without the getrusage call, it reports elapsed
2227 :			time (since some epoch) for duser and 0 for dsystem.""
2228 :			#ifdef HAVE_GETRUSAGE
2229 :			struct rusage usage;
2230 :			getrusage(RUSAGE_SELF, &usage);
2231 :			duser = timeval2us(&usage.ru_utime);
2232 :			dsystem = timeval2us(&usage.ru_stime);
2233 :			#else
2234 :			struct timeval time1;
2235 :			gettimeofday(&time1,NULL);
2236 :			duser = timeval2us(&time1);
2237 :	anton	1.57	#ifndef BUGGY_LONG_LONG
2238 :	anton	1.51	dsystem = (DCell)0;
2239 :	anton	1.57	#else
2240 :			dsystem=(DCell){0,0};
2241 :			#endif
2242 :	anton	1.51	#endif
2243 :
2244 :	pazsan	1.54	\+
2245 :
2246 :			\+floating
2247 :
2248 :	anton	1.51	v* ( f_addr1 nstride1 f_addr2 nstride2 ucount -- r ) gforth v_star
2249 :			""dot-product: r=v1*v2. The first element of v1 is at f_addr1, the
2250 :			next at f_addr1+nstride1 and so on (similar for v2). Both vectors have
2251 :			ucount elements.""
2252 :			for (r=0.; ucount>0; ucount--) {
2253 :			r += f_addr1 *f_addr2;
2254 :			f_addr1 = (Float *)(((Address)f_addr1)+nstride1);
2255 :			f_addr2 = (Float *)(((Address)f_addr2)+nstride2);
2256 :			}
2257 :	pazsan	1.54	:
2258 :			>r swap 2swap swap 0e r> 0 ?DO
2259 :			dup f@ over + 2swap dup f@ f* f+ over + 2swap
2260 :			LOOP 2drop 2drop ;
2261 :	anton	1.51
2262 :			faxpy ( ra f_x nstridex f_y nstridey ucount -- ) gforth
2263 :			""vy=ra*vx+vy""
2264 :			for (; ucount>0; ucount--) {
2265 :			f_y += ra *f_x;
2266 :			f_x = (Float *)(((Address)f_x)+nstridex);
2267 :			f_y = (Float *)(((Address)f_y)+nstridey);
2268 :			}
2269 :	pazsan	1.54	:
2270 :			>r swap 2swap swap r> 0 ?DO
2271 :			fdup dup f@ f* over + 2swap dup f@ f+ dup f! over + 2swap
2272 :			LOOP 2drop 2drop fdrop ;
2273 :	pazsan	1.60
2274 :			\+
2275 :
2276 :			\+file
2277 :
2278 :			(read-line) ( c_addr u1 wfileid -- u2 flag u3 wior ) file paren_read_line
2279 :			Cell c;
2280 :			flag=-1;
2281 :			u3=0;
2282 :			for(u2=0; u2<u1; u2++)
2283 :			{
2284 :			c = getc((FILE *)wfileid);
2285 :			u3++;
2286 :			if (c=='\n') break;
2287 :			if (c=='\r') {
2288 :			if ((c = getc((FILE *)wfileid))!='\n')
2289 :			ungetc(c,(FILE *)wfileid);
2290 :			else
2291 :			u3++;
2292 :			break;
2293 :			}
2294 :			if (c==EOF) {
2295 :			flag=FLAG(u2!=0);
2296 :			break;
2297 :			}
2298 :			c_addr[u2] = (Char)c;
2299 :			}
2300 :			wior=FILEIO(ferror((FILE *)wfileid));
2301 :	anton	1.71
2302 :			\+
2303 :
2304 :			(listlfind) ( c_addr u longname1 -- longname2 ) new paren_listlfind
2305 :			for (; longname1 != NULL; longname1 = (struct Longname *)(longname1->next))
2306 :			if ((UCell)LONGNAME_COUNT(longname1)==u &&
2307 :			memcasecmp(c_addr, longname1->name, u)== 0 /* or inline? */)
2308 :			break;
2309 :			longname2=longname1;
2310 :			:
2311 :	pazsan	1.72	BEGIN dup WHILE (findl-samelen) dup WHILE
2312 :			>r 2dup r@ cell+ cell+ capscomp 0=
2313 :	anton	1.71	IF 2drop r> EXIT THEN
2314 :			r> @
2315 :			REPEAT THEN nip nip ;
2316 :	pazsan	1.72	: (findl-samelen) ( u longname1 -- u longname2/0 )
2317 :			BEGIN 2dup cell+ @ lcount-mask and <> WHILE @ dup 0= UNTIL THEN ;
2318 :	anton	1.71
2319 :			\+hash
2320 :
2321 :			(hashlfind) ( c_addr u a_addr -- longname2 ) new paren_hashlfind
2322 :			struct Longname *longname1;
2323 :			longname2=NULL;
2324 :			while(a_addr != NULL)
2325 :			{
2326 :			longname1=(struct Longname *)(a_addr[1]);
2327 :			a_addr=(Cell *)(a_addr[0]);
2328 :			if ((UCell)LONGNAME_COUNT(longname1)==u &&
2329 :			memcasecmp(c_addr, longname1->name, u)== 0 /* or inline? */)
2330 :			{
2331 :			longname2=longname1;
2332 :			break;
2333 :			}
2334 :			}
2335 :			:
2336 :			BEGIN dup WHILE
2337 :	pazsan	1.72	2@ >r >r dup r@ cell+ @ lcount-mask and =
2338 :			IF 2dup r@ cell+ cell+ capscomp 0=
2339 :	anton	1.71	IF 2drop r> rdrop EXIT THEN THEN
2340 :			rdrop r>
2341 :			REPEAT nip nip ;
2342 :
2343 :			(tablelfind) ( c_addr u a_addr -- longname2 ) new paren_tablelfind
2344 :			""A case-sensitive variant of @code{(hashfind)}""
2345 :			struct Longname *longname1;
2346 :			longname2=NULL;
2347 :			while(a_addr != NULL)
2348 :			{
2349 :			longname1=(struct Longname *)(a_addr[1]);
2350 :			a_addr=(Cell *)(a_addr[0]);
2351 :			if ((UCell)LONGNAME_COUNT(longname1)==u &&
2352 :			memcmp(c_addr, longname1->name, u)== 0 /* or inline? */)
2353 :			{
2354 :			longname2=longname1;
2355 :			break;
2356 :			}
2357 :			}
2358 :			:
2359 :			BEGIN dup WHILE
2360 :	pazsan	1.72	2@ >r >r dup r@ cell+ @ lcount-mask and =
2361 :			IF 2dup r@ cell+ cell+ -text 0=
2362 :	anton	1.71	IF 2drop r> rdrop EXIT THEN THEN
2363 :			rdrop r>
2364 :			REPEAT nip nip ;
2365 :	pazsan	1.54
2366 :			\+
2367 :	pazsan	1.72
2368 :	pazsan	1.80	\+peephole
2369 :	pazsan	1.83
2370 :			\g peephole
2371 :	pazsan	1.80
2372 :	anton	1.74	primtable ( -- wprimtable ) new
2373 :			""wprimtable is a table containing the xts of the primitives indexed
2374 :			by sequence-number in prim (for use in prepare-peephole-table).""
2375 :	anton	1.75	wprimtable = (Cell)primtable(symbols+DOESJUMP+1,MAX_SYMBOLS-DOESJUMP-1);
2376 :	anton	1.74
2377 :			prepare-peephole-table ( wprimtable -- wpeeptable ) new prepare_peephole_opt
2378 :			""wpeeptable is a data structure used by @code{peephole-opt}; it is
2379 :			constructed by combining a primitives table with a simple peephole
2380 :			optimization table.""
2381 :			wpeeptable = prepare_peephole_table((Xt *)wprimtable);
2382 :
2383 :			peephole-opt ( xt1 xt2 wpeeptable -- xt ) new peephole_opt
2384 :			""xt is the combination of xt1 and xt2 (according to wpeeptable); if
2385 :			they cannot be combined, xt is 0.""
2386 :			xt = peephole_opt(xt1, xt2, wpeeptable);
2387 :
2388 :	anton	1.75	call ( #a_callee -- R:a_retaddr )
2389 :			""Call callee (a variant of docol with inline argument).""
2390 :			a_retaddr = (Cell *)IP;
2391 :			SET_IP((Xt *)a_callee);
2392 :
2393 :			useraddr ( #u -- a_addr )
2394 :			a_addr = (Cell *)(up+u);
2395 :	anton	1.82
2396 :			include(peeprules.vmg)
2397 :	anton	1.75
2398 :	pazsan	1.80	\+

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gforth: gforth/prim

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