2 /* --------------------------------------------------------------------------
3 * Primitives for manipulating global data structures
5 * The Hugs 98 system is Copyright (c) Mark P Jones, Alastair Reid, the
6 * Yale Haskell Group, and the Oregon Graduate Institute of Science and
7 * Technology, 1994-1999, All rights reserved. It is distributed as
8 * free software under the license in the file "License", which is
9 * included in the distribution.
11 * $RCSfile: storage.c,v $
13 * $Date: 2000/01/10 16:23:33 $
14 * ------------------------------------------------------------------------*/
24 /*#define DEBUG_SHOWUSE*/
26 /* --------------------------------------------------------------------------
27 * local function prototypes:
28 * ------------------------------------------------------------------------*/
30 static Int local hash Args((String));
31 static Int local saveText Args((Text));
32 static Module local findQualifier Args((Text));
33 static Void local hashTycon Args((Tycon));
34 static List local insertTycon Args((Tycon,List));
35 static Void local hashName Args((Name));
36 static List local insertName Args((Name,List));
37 static Void local patternError Args((String));
38 static Bool local stringMatch Args((String,String));
39 static Bool local typeInvolves Args((Type,Type));
40 static Cell local markCell Args((Cell));
41 static Void local markSnd Args((Cell));
42 static Cell local lowLevelLastIn Args((Cell));
43 static Cell local lowLevelLastOut Args((Cell));
44 Module local moduleOfScript Args((Script));
45 Script local scriptThisFile Args((Text));
47 /* --------------------------------------------------------------------------
50 * provides storage for the characters making up identifier and symbol
51 * names, string literals, character constants etc...
53 * All character strings are stored in a large character array, with textHw
54 * pointing to the next free position. Lookup in the array is improved using
55 * a hash table. Internally, text strings are represented by integer offsets
56 * from the beginning of the array to the string in question.
58 * Where memory permits, the use of multiple hashtables gives a significant
59 * increase in performance, particularly when large source files are used.
61 * Each string in the array is terminated by a zero byte. No string is
62 * stored more than once, so that it is safe to test equality of strings by
63 * comparing the corresponding offsets.
65 * Special text values (beyond the range of the text array table) are used
66 * to generate unique `new variable names' as required.
68 * The same text storage is also used to hold text values stored in a saved
69 * expression. This grows downwards from the top of the text table (and is
70 * not included in the hash table).
71 * ------------------------------------------------------------------------*/
73 #define TEXTHSZ 512 /* Size of Text hash table */
74 #define NOTEXT ((Text)(~0)) /* Empty bucket in Text hash table */
75 static Text textHw; /* Next unused position */
76 static Text savedText = NUM_TEXT; /* Start of saved portion of text */
77 static Text nextNewText; /* Next new text value */
78 static Text nextNewDText; /* Next new dict text value */
79 static char DEFTABLE(text,NUM_TEXT);/* Storage of character strings */
80 static Text textHash[TEXTHSZ][NUM_TEXTH]; /* Hash table storage */
82 String textToStr(t) /* find string corresp to given Text*/
84 static char newVar[16];
86 if (0<=t && t<NUM_TEXT) /* standard char string */
89 sprintf(newVar,"d%d",-t); /* dictionary variable */
91 sprintf(newVar,"v%d",t-NUM_TEXT); /* normal variable */
95 String identToStr(v) /*find string corresp to given ident or qualified name*/
98 internal("identToStr");
104 case CONOPCELL : return text+textOf(v);
106 case QUALIDENT : { Text pos = textHw;
108 while (pos+1 < savedText && text[t]!=0) {
109 text[pos++] = text[t++];
111 if (pos+1 < savedText) {
115 while (pos+1 < savedText && text[t]!=0) {
116 text[pos++] = text[t++];
122 internal("identToStr2");
123 return 0; /* NOTREACHED */
126 Text inventText() { /* return new unused variable name */
127 return nextNewText++;
130 Text inventDictText() { /* return new unused dictvar name */
131 return nextNewDText--;
134 Bool inventedText(t) /* Signal TRUE if text has been */
135 Text t; { /* generated internally */
136 return (t<0 || t>=NUM_TEXT);
139 #define MAX_FIXLIT 100
140 Text fixLitText(t) /* fix literal text that might include \ */
142 String s = textToStr(t);
145 for(i = 0;i < MAX_FIXLIT-2 && *s;s++) {
151 if (i < MAX_FIXLIT-2) {
154 ERRMSG(0) "storage space exhausted for internal literal string"
157 return (findText(p));
161 static Int local hash(s) /* Simple hash function on strings */
165 for (v=((int)(*s))*8; *s; s++)
166 v += ((int)(*s))*(j++);
172 Text findText(s) /* Locate string in Text array */
176 Text textPos = textHash[h][hashno];
178 #define TryMatch { Text originalTextPos = textPos; \
180 for (t=s; *t==text[textPos]; textPos++,t++) \
182 return originalTextPos; \
184 #define Skip while (text[textPos++]) ;
186 while (textPos!=NOTEXT) {
188 if (++hashno<NUM_TEXTH) /* look in next hashtable entry */
189 textPos = textHash[h][hashno];
192 while (textPos < textHw) {
203 textPos = textHw; /* if not found, save in array */
204 if (textHw + (Int)strlen(s) + 1 > savedText) {
205 ERRMSG(0) "Character string storage space exhausted"
208 while ((text[textHw++] = *s++) != 0) {
210 if (hashno<NUM_TEXTH) { /* updating hash table as necessary */
211 textHash[h][hashno] = textPos;
212 if (hashno<NUM_TEXTH-1)
213 textHash[h][hashno+1] = NOTEXT;
219 static Int local saveText(t) /* Save text value in buffer */
220 Text t; { /* at top of text table */
221 String s = textToStr(t);
224 if (textHw + l + 1 > savedText) {
225 ERRMSG(0) "Character string storage space exhausted"
229 strcpy(text+savedText,s);
234 static int fromHexDigit ( char c )
237 case '0': case '1': case '2': case '3': case '4':
238 case '5': case '6': case '7': case '8': case '9':
240 case 'a': case 'A': return 10;
241 case 'b': case 'B': return 11;
242 case 'c': case 'C': return 12;
243 case 'd': case 'D': return 13;
244 case 'e': case 'E': return 14;
245 case 'f': case 'F': return 15;
251 /* returns findText (unZencode s) */
252 Text unZcodeThenFindText ( String s )
259 nn = 100 + 10 * strlen(s);
261 if (!p) internal ("unZcodeThenFindText: malloc failed");
266 if (n > nn-90) internal ("unZcodeThenFindText: result is too big");
267 if (*s != 'z' && *s != 'Z') {
272 if (!(*s)) goto parse_error;
274 case 'Z': p[n++] = 'Z'; break;
275 case 'C': p[n++] = ':'; break;
276 case 'L': p[n++] = '('; break;
277 case 'R': p[n++] = ')'; break;
278 case 'M': p[n++] = '['; break;
279 case 'N': p[n++] = ']'; break;
280 case 'z': p[n++] = 'z'; break;
281 case 'a': p[n++] = '&'; break;
282 case 'b': p[n++] = '|'; break;
283 case 'd': p[n++] = '$'; break;
284 case 'e': p[n++] = '='; break;
285 case 'g': p[n++] = '>'; break;
286 case 'h': p[n++] = '#'; break;
287 case 'i': p[n++] = '.'; break;
288 case 'l': p[n++] = '<'; break;
289 case 'm': p[n++] = '-'; break;
290 case 'n': p[n++] = '!'; break;
291 case 'p': p[n++] = '+'; break;
292 case 'q': p[n++] = '\\'; break;
293 case 'r': p[n++] = '\''; break;
294 case 's': p[n++] = '/'; break;
295 case 't': p[n++] = '*'; break;
296 case 'u': p[n++] = '^'; break;
297 case 'v': p[n++] = '%'; break;
299 if (!s[0] || !s[1]) goto parse_error;
300 if (fromHexDigit(s[0]) < 0 || fromHexDigit(s[1]) < 0) goto parse_error;
301 p[n++] = 16 * fromHexDigit(s[0]) + fromHexDigit(s[1]);
304 case '0': case '1': case '2': case '3': case '4':
305 case '5': case '6': case '7': case '8': case '9':
308 while (*s && isdigit((int)(*s))) {
309 i = 10 * i + (*s - '0');
312 if (*s != 'T') goto parse_error;
315 while (i > 0) { p[n++] = ','; i--; };
329 fprintf ( stderr, "\nstring = `%s'\n", s );
330 internal ( "unZcodeThenFindText: parse error on above string");
331 return NIL; /*notreached*/
335 Text enZcodeThenFindText ( String s )
340 char toHex[16] = "0123456789ABCDEF";
343 nn = 100 + 10 * strlen(s);
345 if (!p) internal ("enZcodeThenFindText: malloc failed");
349 if (n > nn-90) internal ("enZcodeThenFindText: result is too big");
352 && (isalnum((int)(*s)) || *s == '_')) {
357 case '(': p[n++] = 'Z'; p[n++] = 'L'; break;
358 case ')': p[n++] = 'Z'; p[n++] = 'R'; break;
359 case '[': p[n++] = 'Z'; p[n++] = 'M'; break;
360 case ']': p[n++] = 'Z'; p[n++] = 'N'; break;
361 case ':': p[n++] = 'Z'; p[n++] = 'C'; break;
362 case 'Z': p[n++] = 'Z'; p[n++] = 'Z'; break;
363 case 'z': p[n++] = 'z'; p[n++] = 'z'; break;
364 case '&': p[n++] = 'z'; p[n++] = 'a'; break;
365 case '|': p[n++] = 'z'; p[n++] = 'b'; break;
366 case '$': p[n++] = 'z'; p[n++] = 'd'; break;
367 case '=': p[n++] = 'z'; p[n++] = 'e'; break;
368 case '>': p[n++] = 'z'; p[n++] = 'g'; break;
369 case '#': p[n++] = 'z'; p[n++] = 'h'; break;
370 case '.': p[n++] = 'z'; p[n++] = 'i'; break;
371 case '<': p[n++] = 'z'; p[n++] = 'l'; break;
372 case '-': p[n++] = 'z'; p[n++] = 'm'; break;
373 case '!': p[n++] = 'z'; p[n++] = 'n'; break;
374 case '+': p[n++] = 'z'; p[n++] = 'p'; break;
375 case '\'': p[n++] = 'z'; p[n++] = 'q'; break;
376 case '\\': p[n++] = 'z'; p[n++] = 'r'; break;
377 case '/': p[n++] = 'z'; p[n++] = 's'; break;
378 case '*': p[n++] = 'z'; p[n++] = 't'; break;
379 case '^': p[n++] = 'z'; p[n++] = 'u'; break;
380 case '%': p[n++] = 'z'; p[n++] = 'v'; break;
381 default: s--; p[n++] = 'z'; p[n++] = 'x';
382 p[n++] = toHex[(int)(*s)/16];
383 p[n++] = toHex[(int)(*s)%16];
394 Text textOf ( Cell c )
397 (whatIs(c)==VARIDCELL
398 || whatIs(c)==CONIDCELL
399 || whatIs(c)==VAROPCELL
400 || whatIs(c)==CONOPCELL
401 || whatIs(c)==STRCELL
402 || whatIs(c)==DICTVAR
405 fprintf(stderr, "\ntextOf: bad tag %d\n",whatIs(c) );
406 internal("textOf: bad tag");
411 /* --------------------------------------------------------------------------
414 * Currently, the only attributes that we store for each Ext value is the
415 * corresponding Text label. At some later stage, we may decide to cache
416 * types, predicates, etc. here as a space saving gesture. Given that Text
417 * comparison is cheap, and that this is an experimental implementation, we
418 * will use a straightforward linear search to locate Ext values from their
419 * corresponding Text labels; a hashing scheme can be introduced later if
420 * this turns out to be a problem.
421 * ------------------------------------------------------------------------*/
424 Text DEFTABLE(tabExt,NUM_EXT); /* Storage for Ext names */
427 Ext mkExt(t) /* Allocate or find an Ext value */
433 if (extHw-EXTMIN >= NUM_EXT) {
434 ERRMSG(0) "Ext storage space exhausted"
442 /* --------------------------------------------------------------------------
445 * A Tycon represents a user defined type constructor. Tycons are indexed
446 * by Text values ... a very simple hash function is used to improve lookup
447 * times. Tycon entries with the same hash code are chained together, with
448 * the most recent entry at the front of the list.
449 * ------------------------------------------------------------------------*/
451 #define TYCONHSZ 256 /* Size of Tycon hash table*/
452 #define tHash(x) ((x)%TYCONHSZ) /* Tycon hash function */
453 static Tycon tyconHw; /* next unused Tycon */
454 static Tycon DEFTABLE(tyconHash,TYCONHSZ); /* Hash table storage */
455 struct strTycon DEFTABLE(tabTycon,NUM_TYCON); /* Tycon storage */
457 Tycon newTycon(t) /* add new tycon to tycon table */
460 if (tyconHw-TYCMIN >= NUM_TYCON) {
461 ERRMSG(0) "Type constructor storage space exhausted"
464 tycon(tyconHw).text = t; /* clear new tycon record */
465 tycon(tyconHw).kind = NIL;
466 tycon(tyconHw).defn = NIL;
467 tycon(tyconHw).what = NIL;
468 tycon(tyconHw).conToTag = NIL;
469 tycon(tyconHw).tagToCon = NIL;
470 tycon(tyconHw).tuple = -1;
471 tycon(tyconHw).mod = currentModule;
472 tycon(tyconHw).itbl = NULL;
473 module(currentModule).tycons = cons(tyconHw,module(currentModule).tycons);
474 tycon(tyconHw).nextTyconHash = tyconHash[h];
475 tyconHash[h] = tyconHw;
480 Tycon findTycon(t) /* locate Tycon in tycon table */
482 Tycon tc = tyconHash[tHash(t)];
484 while (nonNull(tc) && tycon(tc).text!=t)
485 tc = tycon(tc).nextTyconHash;
489 Tycon addTycon(tc) /* Insert Tycon in tycon table - if no clash is caused */
492 assert(whatIs(tc)==TYCON || whatIs(tc)==TUPLE);
493 oldtc = findTycon(tycon(tc).text);
496 module(currentModule).tycons=cons(tc,module(currentModule).tycons);
502 static Void local hashTycon(tc) /* Insert Tycon into hash table */
504 if (!(isTycon(tc) || isTuple(tc))) {
505 printf("\nbad stuff: " ); print(tc,10); printf("\n");
506 assert(isTycon(tc) || isTuple(tc));
509 Text t = tycon(tc).text;
511 tycon(tc).nextTyconHash = tyconHash[h];
516 Tycon findQualTycon(id) /*locate (possibly qualified) Tycon in tycon table */
518 if (!isPair(id)) internal("findQualTycon");
522 return findTycon(textOf(id));
524 Text t = qtextOf(id);
525 Module m = findQualifier(qmodOf(id));
527 if (isNull(m)) return NIL;
528 for(es=module(m).exports; nonNull(es); es=tl(es)) {
530 if (isPair(e) && isTycon(fst(e)) && tycon(fst(e)).text==t)
535 default : internal("findQualTycon2");
537 return NIL; /* NOTREACHED */
540 Tycon addPrimTycon(t,kind,ar,what,defn) /* add new primitive type constr */
546 Tycon tc = newTycon(t);
548 tycon(tc).kind = kind;
549 tycon(tc).what = what;
550 tycon(tc).defn = defn;
551 tycon(tc).arity = ar;
555 static List local insertTycon(tc,ts) /* insert tycon tc into sorted list*/
560 String s = textToStr(tycon(tc).text);
562 while (nonNull(curr) && strCompare(s,textToStr(tycon(hd(curr)).text))>=0) {
563 if (hd(curr)==tc) /* just in case we get duplicates! */
569 tl(prev) = cons(tc,curr);
573 return cons(tc,curr);
576 List addTyconsMatching(pat,ts) /* Add tycons matching pattern pat */
577 String pat; /* to list of Tycons ts */
578 List ts; { /* Null pattern matches every tycon*/
579 Tycon tc; /* (Tycons with NIL kind excluded) */
580 for (tc=TYCMIN; tc<tyconHw; ++tc)
581 if (!pat || stringMatch(pat,textToStr(tycon(tc).text)))
582 if (nonNull(tycon(tc).kind))
583 ts = insertTycon(tc,ts);
587 Text ghcTupleText_n ( Int n )
591 if (n < 0 || n >= 100) internal("ghcTupleText_n");
593 for (i = 1; i <= n; i++) buf[i] = ',';
596 return findText(buf);
599 Text ghcTupleText(tup)
602 assert(isTuple(tup));
604 return ghcTupleText_n ( tupleOf(tup) );
608 Tycon mkTuple ( Int n )
612 internal("mkTuple: request for tuple of unsupported size");
613 for (i = TYCMIN; i < tyconHw; i++)
614 if (tycon(i).tuple == n) return i;
615 internal("mkTuple: request for non-existent tuple");
619 /* --------------------------------------------------------------------------
622 * A Name represents a top level binding of a value to an identifier.
623 * Such values may be a constructor function, a member function in a
624 * class, a user-defined or primitive value/function.
626 * Names are indexed by Text values ... a very simple hash functions speeds
627 * access to the table of Names and Name entries with the same hash value
628 * are chained together, with the most recent entry at the front of the
630 * ------------------------------------------------------------------------*/
632 #define NAMEHSZ 256 /* Size of Name hash table */
633 #define nHash(x) ((x)%NAMEHSZ) /* hash fn :: Text->Int */
634 Name nameHw; /* next unused name */
635 static Name DEFTABLE(nameHash,NAMEHSZ); /* Hash table storage */
636 struct strName DEFTABLE(tabName,NUM_NAME); /* Name table storage */
638 Name newName(t,parent) /* Add new name to name table */
642 if (nameHw-NAMEMIN >= NUM_NAME) {
643 ERRMSG(0) "Name storage space exhausted"
646 name(nameHw).text = t; /* clear new name record */
647 name(nameHw).line = 0;
648 name(nameHw).syntax = NO_SYNTAX;
649 name(nameHw).parent = parent;
650 name(nameHw).arity = 0;
651 name(nameHw).number = EXECNAME;
652 name(nameHw).defn = NIL;
653 name(nameHw).stgVar = NIL;
654 name(nameHw).callconv = NIL;
655 name(nameHw).type = NIL;
656 name(nameHw).primop = 0;
657 name(nameHw).mod = currentModule;
658 name(nameHw).itbl = NULL;
659 module(currentModule).names=cons(nameHw,module(currentModule).names);
660 name(nameHw).nextNameHash = nameHash[h];
661 nameHash[h] = nameHw;
665 Name findName(t) /* Locate name in name table */
667 Name n = nameHash[nHash(t)];
669 while (nonNull(n) && name(n).text!=t)
670 n = name(n).nextNameHash;
674 Name addName(nm) /* Insert Name in name table - if */
675 Name nm; { /* no clash is caused */
677 assert(whatIs(nm)==NAME);
678 oldnm = findName(name(nm).text);
681 module(currentModule).names=cons(nm,module(currentModule).names);
687 static Void local hashName(nm) /* Insert Name into hash table */
694 name(nm).nextNameHash = nameHash[h];
698 Name findQualName(id) /* Locate (possibly qualified) name*/
699 Cell id; { /* in name table */
701 internal("findQualName");
707 return findName(textOf(id));
709 Text t = qtextOf(id);
710 Module m = findQualifier(qmodOf(id));
712 if (isNull(m)) return NIL;
713 for(es=module(m).exports; nonNull(es); es=tl(es)) {
715 if (isName(e) && name(e).text==t)
717 else if (isPair(e) && DOTDOT==snd(e)) {
718 List subentities = NIL;
721 && (tycon(c).what==DATATYPE || tycon(c).what==NEWTYPE))
722 subentities = tycon(c).defn;
724 subentities = cclass(c).members;
725 for(; nonNull(subentities); subentities=tl(subentities)) {
726 if (!isName(hd(subentities)))
727 internal("findQualName3");
728 if (name(hd(subentities)).text == t)
729 return hd(subentities);
735 default : internal("findQualName2");
737 return 0; /* NOTREACHED */
741 Name nameFromStgVar ( StgVar v )
744 for (n = NAMEMIN; n < nameHw; n++)
745 if (name(n).stgVar == v) return n;
749 void* getHugs_AsmObject_for ( char* s )
752 Text t = findText(s);
754 for (n = NAMEMIN; n < nameHw; n++)
755 if (name(n).text == t) break;
756 if (n == nameHw) internal("getHugs_AsmObject_for(1)");
758 if (!isStgVar(v) || !isPtr(stgVarInfo(v)))
759 internal("getHugs_AsmObject_for(2)");
760 return ptrOf(stgVarInfo(v));
763 /* --------------------------------------------------------------------------
764 * Primitive functions:
765 * ------------------------------------------------------------------------*/
767 Module findFakeModule ( Text t )
769 Module m = findModule(t);
771 if (!module(m).fake) internal("findFakeModule");
774 module(m).fake = TRUE;
780 Name addWiredInBoxingTycon
781 ( String modNm, String typeNm, String constrNm,
782 Int arity, Int no, Int rep )
786 Text modT = findText(modNm);
787 Text typeT = findText(typeNm);
788 Text conT = findText(constrNm);
789 Module m = findFakeModule(modT);
792 n = newName(conT,NIL);
793 name(n).arity = arity;
794 name(n).number = cfunNo(no);
796 name(n).primop = (void*)rep;
799 tycon(t).what = DATATYPE;
804 Tycon addTupleTycon ( Int n )
812 for (i = TYCMIN; i < tyconHw; i++)
813 if (tycon(i).tuple == n) return i;
816 m = findFakeModule(findText(n==0 ? "PrelBase" : "PrelTup")); else
817 m = findModule(findText("Prelude"));
821 for (i = 0; i < n; i++) k = ap(STAR,k);
822 t = newTycon(ghcTupleText_n(n));
825 tycon(t).what = DATATYPE;
828 /* maybe we want to do this for all n ? */
829 nm = newName(ghcTupleText_n(n), t);
830 name(nm).type = t; /* ummm ... for n > 0 */
837 Tycon addWiredInEnumTycon ( String modNm, String typeNm,
838 List /*of Text*/ constrs )
842 Text modT = findText(modNm);
843 Text typeT = findText(typeNm);
844 Module m = findFakeModule(modT);
848 tycon(t).kind = STAR;
849 tycon(t).what = DATATYPE;
851 constrs = reverse(constrs);
853 for (; nonNull(constrs); constrs=tl(constrs),i--) {
854 Text conT = hd(constrs);
855 Name con = newName(conT,t);
856 name(con).number = cfunNo(i);
858 tycon(t).defn = cons(con, tycon(t).defn);
864 Name addPrimCfunREP(t,arity,no,rep) /* add primitive constructor func */
865 Text t; /* sets rep, not type */
868 Int rep; { /* Really AsmRep */
869 Name n = newName(t,NIL);
870 name(n).arity = arity;
871 name(n).number = cfunNo(no);
873 name(n).primop = (void*)rep;
878 Name addPrimCfun(t,arity,no,type) /* add primitive constructor func */
883 Name n = newName(t,NIL);
884 name(n).arity = arity;
885 name(n).number = cfunNo(no);
891 Int sfunPos(s,c) /* Find position of field with */
892 Name s; /* selector s in constructor c. */
896 for (; nonNull(cns); cns=tl(cns))
898 return intOf(snd(hd(cns)));
900 return 0;/* NOTREACHED */
903 static List local insertName(nm,ns) /* insert name nm into sorted list */
908 String s = textToStr(name(nm).text);
910 while (nonNull(curr) && strCompare(s,textToStr(name(hd(curr)).text))>=0) {
911 if (hd(curr)==nm) /* just in case we get duplicates! */
917 tl(prev) = cons(nm,curr);
921 return cons(nm,curr);
924 List addNamesMatching(pat,ns) /* Add names matching pattern pat */
925 String pat; /* to list of names ns */
926 List ns; { /* Null pattern matches every name */
927 Name nm; /* (Names with NIL type, or hidden */
929 for (nm=NAMEMIN; nm<nameHw; ++nm) /* or invented names are excluded) */
930 if (!inventedText(name(nm).text) && nonNull(name(nm).type)) {
931 String str = textToStr(name(nm).text);
932 if (str[0]!='_' && (!pat || stringMatch(pat,str)))
933 ns = insertName(nm,ns);
937 List mns = module(currentModule).names;
938 for(; nonNull(mns); mns=tl(mns)) {
940 if (!inventedText(name(nm).text)) {
941 String str = textToStr(name(nm).text);
942 if (str[0]!='_' && (!pat || stringMatch(pat,str)))
943 ns = insertName(nm,ns);
950 /* --------------------------------------------------------------------------
951 * A simple string matching routine
952 * `*' matches any sequence of zero or more characters
953 * `?' matches any single character exactly
954 * `@str' matches the string str exactly (ignoring any special chars)
955 * `\c' matches the character c only (ignoring special chars)
956 * c matches the character c only
957 * ------------------------------------------------------------------------*/
959 static Void local patternError(s) /* report error in pattern */
961 ERRMSG(0) "%s in pattern", s
965 static Bool local stringMatch(pat,str) /* match string against pattern */
971 case '\0' : return (*str=='\0');
974 if (stringMatch(pat+1,str))
979 case '?' : if (*str++=='\0')
984 case '[' : { Bool found = FALSE;
985 while (*++pat!='\0' && *pat!=']')
986 if (!found && ( pat[0] == *str ||
995 patternError("missing `]'");
1003 case '\\' : if (*++pat == '\0')
1004 patternError("extra trailing `\\'");
1006 default : if (*pat++ != *str++)
1012 /* --------------------------------------------------------------------------
1013 * Storage of type classes, instances etc...:
1014 * ------------------------------------------------------------------------*/
1016 static Class classHw; /* next unused class */
1017 static List classes; /* list of classes in current scope */
1018 static Inst instHw; /* next unused instance record */
1020 struct strClass DEFTABLE(tabClass,NUM_CLASSES); /* table of class records */
1021 struct strInst far *tabInst; /* (pointer to) table of instances */
1023 Class newClass(t) /* add new class to class table */
1025 if (classHw-CLASSMIN >= NUM_CLASSES) {
1026 ERRMSG(0) "Class storage space exhausted"
1029 cclass(classHw).text = t;
1030 cclass(classHw).arity = 0;
1031 cclass(classHw).kinds = NIL;
1032 cclass(classHw).head = NIL;
1033 cclass(classHw).fds = NIL;
1034 cclass(classHw).xfds = NIL;
1035 cclass(classHw).dcon = NIL;
1036 cclass(classHw).supers = NIL;
1037 cclass(classHw).dsels = NIL;
1038 cclass(classHw).members = NIL;
1039 cclass(classHw).defaults = NIL;
1040 cclass(classHw).instances = NIL;
1041 classes=cons(classHw,classes);
1042 cclass(classHw).mod = currentModule;
1043 module(currentModule).classes=cons(classHw,module(currentModule).classes);
1047 Class classMax() { /* Return max Class in use ... */
1048 return classHw; /* This is a bit ugly, but it's not*/
1049 } /* worth a lot of effort right now */
1051 Class findClass(t) /* look for named class in table */
1055 for (cs=classes; nonNull(cs); cs=tl(cs)) {
1057 if (cclass(cl).text==t)
1063 Class addClass(c) /* Insert Class in class list */
1064 Class c; { /* - if no clash caused */
1066 assert(whatIs(c)==CLASS);
1067 oldc = findClass(cclass(c).text);
1069 classes=cons(c,classes);
1070 module(currentModule).classes=cons(c,module(currentModule).classes);
1077 Class findQualClass(c) /* Look for (possibly qualified) */
1078 Cell c; { /* class in class list */
1079 if (!isQualIdent(c)) {
1080 return findClass(textOf(c));
1082 Text t = qtextOf(c);
1083 Module m = findQualifier(qmodOf(c));
1087 for (es=module(m).exports; nonNull(es); es=tl(es)) {
1089 if (isPair(e) && isClass(fst(e)) && cclass(fst(e)).text==t)
1096 Inst newInst() { /* Add new instance to table */
1097 if (instHw-INSTMIN >= NUM_INSTS) {
1098 ERRMSG(0) "Instance storage space exhausted"
1101 inst(instHw).kinds = NIL;
1102 inst(instHw).head = NIL;
1103 inst(instHw).specifics = NIL;
1104 inst(instHw).implements = NIL;
1105 inst(instHw).builder = NIL;
1106 inst(instHw).mod = currentModule;
1112 extern Void printInst Args((Inst));
1116 Class cl = inst(in).c;
1117 Printf("%s-", textToStr(cclass(cl).text));
1118 printType(stdout,inst(in).t);
1120 #endif /* DEBUG_DICTS */
1122 Inst findFirstInst(tc) /* look for 1st instance involving */
1123 Tycon tc; { /* the type constructor tc */
1124 return findNextInst(tc,INSTMIN-1);
1127 Inst findNextInst(tc,in) /* look for next instance involving*/
1128 Tycon tc; /* the type constructor tc */
1129 Inst in; { /* starting after instance in */
1130 while (++in < instHw) {
1131 Cell pi = inst(in).head;
1132 for (; isAp(pi); pi=fun(pi))
1133 if (typeInvolves(arg(pi),tc))
1139 static Bool local typeInvolves(ty,tc) /* Test to see if type ty involves */
1140 Type ty; /* type constructor/tuple tc. */
1143 || (isAp(ty) && (typeInvolves(fun(ty),tc)
1144 || typeInvolves(arg(ty),tc)));
1148 /* Needed by finishGHCInstance to find classes, before the
1149 export list has been built -- so we can't use
1152 Class findQualClassWithoutConsultingExportList ( QualId q )
1162 t_class = textOf(q);
1165 t_class = qtextOf(q);
1168 for (cl = CLASSMIN; cl < classHw; cl++) {
1169 if (cclass(cl).text == t_class) {
1170 /* Class name is ok, but is this the right module? */
1171 if (isNull(t_mod) /* no module name specified */
1173 && t_mod == module(cclass(cl).mod).text)
1182 /* Same deal, except for Tycons. */
1183 Tycon findQualTyconWithoutConsultingExportList ( QualId q )
1193 t_tycon = textOf(q);
1196 t_tycon = qtextOf(q);
1199 for (tc = TYCMIN; tc < tyconHw; tc++) {
1200 if (tycon(tc).text == t_tycon) {
1201 /* Tycon name is ok, but is this the right module? */
1202 if (isNull(t_mod) /* no module name specified */
1204 && t_mod == module(tycon(tc).mod).text)
1212 Tycon findTyconInAnyModule ( Text t )
1215 for (tc = TYCMIN; tc < tyconHw; tc++)
1216 if (tycon(tc).text == t) return tc;
1220 Class findClassInAnyModule ( Text t )
1223 for (cc = CLASSMIN; cc < classHw; cc++)
1224 if (cclass(cc).text == t) return cc;
1228 Name findNameInAnyModule ( Text t )
1231 for (nm = NAMEMIN; nm < nameHw; nm++)
1232 if (name(nm).text == t) return nm;
1236 /* Same deal, except for Names. */
1237 Name findQualNameWithoutConsultingExportList ( QualId q )
1243 assert(isQVar(q) || isQCon(q));
1245 if (isCon(q) || isVar(q)) {
1250 t_name = qtextOf(q);
1253 for (nm = NAMEMIN; nm < nameHw; nm++) {
1254 if (name(nm).text == t_name) {
1255 /* Name is ok, but is this the right module? */
1256 if (isNull(t_mod) /* no module name specified */
1258 && t_mod == module(name(nm).mod).text)
1267 /* returns List of QualId */
1268 List getAllKnownTyconsAndClasses ( void )
1273 for (tc = TYCMIN; tc < tyconHw; tc++) {
1274 /* almost certainly undue paranoia about duplicate avoidance, but .. */
1275 QualId q = mkQCon( module(tycon(tc).mod).text, tycon(tc).text );
1276 if (!qualidIsMember(q,xs))
1277 xs = cons ( q, xs );
1279 for (nw = CLASSMIN; nw < classHw; nw++) {
1280 QualId q = mkQCon( module(cclass(nw).mod).text, cclass(nw).text );
1281 if (!qualidIsMember(q,xs))
1282 xs = cons ( q, xs );
1287 /* --------------------------------------------------------------------------
1290 * Various parts of the system use a stack of cells. Most of the stack
1291 * operations are defined as macros, expanded inline.
1292 * ------------------------------------------------------------------------*/
1294 Cell DEFTABLE(cellStack,NUM_STACK); /* Storage for cells on stack */
1295 StackPtr sp; /* stack pointer */
1297 #if GIMME_STACK_DUMPS
1299 #define UPPER_DISP 5 /* # display entries on top of stack */
1300 #define LOWER_DISP 5 /* # display entries on bottom of stack*/
1302 Void hugsStackOverflow() { /* Report stack overflow */
1304 extern Cell evalRoots[];
1306 ERRMSG(0) "Control stack overflow" ETHEN
1309 if (rootsp>=UPPER_DISP+LOWER_DISP) {
1310 for (i=0; i<UPPER_DISP; i++) {
1311 ERRTEXT "\nwhile evaluating: " ETHEN
1312 ERREXPR(evalRoots[rootsp-i]);
1314 ERRTEXT "\n..." ETHEN
1315 for (i=LOWER_DISP-1; i>=0; i--) {
1316 ERRTEXT "\nwhile evaluating: " ETHEN
1317 ERREXPR(evalRoots[i]);
1321 for (i=rootsp; i>=0; i--) {
1322 ERRTEXT "\nwhile evaluating: " ETHEN
1323 ERREXPR(evalRoots[i]);
1331 #else /* !GIMME_STACK_DUMPS */
1333 Void hugsStackOverflow() { /* Report stack overflow */
1334 ERRMSG(0) "Control stack overflow"
1338 #endif /* !GIMME_STACK_DUMPS */
1340 /* --------------------------------------------------------------------------
1343 * A Module represents a user defined module.
1345 * Note: there are now two lookup mechanisms in the system:
1347 * 1) The exports from a module are stored in a big list.
1348 * We resolve qualified names, and import lists by linearly scanning
1349 * through this list.
1351 * 2) Unqualified imports and local definitions for the current module
1352 * are stored in hash tables (tyconHash and nameHash) or linear lists
1355 * ------------------------------------------------------------------------*/
1357 static Module moduleHw; /* next unused Module */
1358 struct Module DEFTABLE(tabModule,NUM_MODULE); /* Module storage */
1359 Module currentModule; /* Module currently being processed*/
1361 Bool isValidModule(m) /* is m a legitimate module id? */
1363 return (MODMIN <= m && m < moduleHw);
1366 Module newModule(t) /* add new module to module table */
1368 if (moduleHw-MODMIN >= NUM_MODULE) {
1369 ERRMSG(0) "Module storage space exhausted"
1372 module(moduleHw).text = t; /* clear new module record */
1373 module(moduleHw).qualImports = NIL;
1374 module(moduleHw).fake = FALSE;
1375 module(moduleHw).exports = NIL;
1376 module(moduleHw).tycons = NIL;
1377 module(moduleHw).names = NIL;
1378 module(moduleHw).classes = NIL;
1379 module(moduleHw).object = NULL;
1380 module(moduleHw).objectExtras = NULL;
1381 module(moduleHw).objectExtraNames = NIL;
1385 void ppModules ( void )
1388 fflush(stderr); fflush(stdout);
1389 printf ( "begin MODULES\n" );
1390 for (i = moduleHw-1; i >= MODMIN; i--)
1391 printf ( " %2d: %16s\n",
1392 i-MODMIN, textToStr(module(i).text)
1394 printf ( "end MODULES\n" );
1395 fflush(stderr); fflush(stdout);
1399 Module findModule(t) /* locate Module in module table */
1402 for(m=MODMIN; m<moduleHw; ++m) {
1403 if (module(m).text==t)
1409 Module findModid(c) /* Find module by name or filename */
1411 switch (whatIs(c)) {
1412 case STRCELL : { Script s = scriptThisFile(snd(c));
1413 return (s==-1) ? NIL : moduleOfScript(s);
1415 case CONIDCELL : return findModule(textOf(c));
1416 default : internal("findModid");
1418 return NIL;/*NOTUSED*/
1421 static local Module findQualifier(t) /* locate Module in import list */
1424 for (ms=module(currentModule).qualImports; nonNull(ms); ms=tl(ms)) {
1425 if (textOf(fst(hd(ms)))==t)
1429 if (module(currentModule).text==t)
1430 return currentModule;
1435 Void setCurrModule(m) /* set lookup tables for current module */
1438 assert(isModule(m));
1439 if (m!=currentModule) {
1440 currentModule = m; /* This is the only assignment to currentModule */
1441 for (i=0; i<TYCONHSZ; ++i)
1443 mapProc(hashTycon,module(m).tycons);
1444 for (i=0; i<NAMEHSZ; ++i)
1446 mapProc(hashName,module(m).names);
1447 classes = module(m).classes;
1451 Name jrsFindQualName ( Text mn, Text sn )
1456 for (m=MODMIN; m<moduleHw; m++)
1457 if (module(m).text == mn) break;
1458 if (m == moduleHw) return NIL;
1460 for (ns = module(m).names; nonNull(ns); ns=tl(ns))
1461 if (name(hd(ns)).text == sn) return hd(ns);
1467 char* nameFromOPtr ( void* p )
1471 for (m=MODMIN; m<moduleHw; m++) {
1472 char* nm = ocLookupAddr ( module(m).object, p );
1479 void* lookupOTabName ( Module m, char* sym )
1481 return ocLookupSym ( module(m).object, sym );
1485 void* lookupOExtraTabName ( char* sym )
1489 for (m = MODMIN; m < moduleHw; m++) {
1490 for (oc = module(m).objectExtras; oc; oc=oc->next) {
1491 void* ad = ocLookupSym ( oc, sym );
1499 OSectionKind lookupSection ( void* ad )
1503 for (m=MODMIN; m<moduleHw; m++) {
1505 = ocLookupSection ( module(m).object, ad );
1506 if (sect != HUGS_SECTIONKIND_NOINFOAVAIL)
1509 return HUGS_SECTIONKIND_OTHER;
1513 /* --------------------------------------------------------------------------
1514 * Script file storage:
1516 * script files are read into the system one after another. The state of
1517 * the stored data structures (except the garbage-collected heap) is recorded
1518 * before reading a new script. In the event of being unable to read the
1519 * script, or if otherwise requested, the system can be restored to its
1520 * original state immediately before the file was read.
1521 * ------------------------------------------------------------------------*/
1523 typedef struct { /* record of storage state prior to */
1524 Text file; /* reading script/module */
1538 #ifdef DEBUG_SHOWUSE
1539 static Void local showUse(msg,val,mx)
1542 Printf("%6s : %5d of %5d (%2d%%)\n",msg,val,mx,(100*val)/mx);
1546 static Script scriptHw; /* next unused script number */
1547 static script scripts[NUM_SCRIPTS]; /* storage for script records */
1550 void ppScripts ( void )
1553 fflush(stderr); fflush(stdout);
1554 printf ( "begin SCRIPTS\n" );
1555 for (i = scriptHw-1; i >= 0; i--)
1556 printf ( " %2d: %16s tH=%d mH=%d yH=%d "
1557 "nH=%d cH=%d iH=%d nnS=%d,%d\n",
1558 i, textToStr(scripts[i].file),
1559 scripts[i].textHw, scripts[i].moduleHw,
1560 scripts[i].tyconHw, scripts[i].nameHw,
1561 scripts[i].classHw, scripts[i].instHw,
1562 scripts[i].nextNewText, scripts[i].nextNewDText
1564 printf ( "end SCRIPTS\n" );
1565 fflush(stderr); fflush(stdout);
1568 Script startNewScript(f) /* start new script, keeping record */
1569 String f; { /* of status for later restoration */
1570 if (scriptHw >= NUM_SCRIPTS) {
1571 ERRMSG(0) "Too many script files in use"
1574 #ifdef DEBUG_SHOWUSE
1575 showUse("Text", textHw, NUM_TEXT);
1576 showUse("Module", moduleHw-MODMIN, NUM_MODULE);
1577 showUse("Tycon", tyconHw-TYCMIN, NUM_TYCON);
1578 showUse("Name", nameHw-NAMEMIN, NUM_NAME);
1579 showUse("Class", classHw-CLASSMIN, NUM_CLASSES);
1580 showUse("Inst", instHw-INSTMIN, NUM_INSTS);
1582 showUse("Ext", extHw-EXTMIN, NUM_EXT);
1585 scripts[scriptHw].file = findText( f ? f : "<nofile>" );
1586 scripts[scriptHw].textHw = textHw;
1587 scripts[scriptHw].nextNewText = nextNewText;
1588 scripts[scriptHw].nextNewDText = nextNewDText;
1589 scripts[scriptHw].moduleHw = moduleHw;
1590 scripts[scriptHw].tyconHw = tyconHw;
1591 scripts[scriptHw].nameHw = nameHw;
1592 scripts[scriptHw].classHw = classHw;
1593 scripts[scriptHw].instHw = instHw;
1595 scripts[scriptHw].extHw = extHw;
1600 Bool isPreludeScript() { /* Test whether this is the Prelude*/
1601 return (scriptHw==0);
1604 Bool moduleThisScript(m) /* Test if given module is defined */
1605 Module m; { /* in current script file */
1606 return scriptHw<1 || m>=scripts[scriptHw-1].moduleHw;
1609 Module lastModule() { /* Return module in current script file */
1610 return (moduleHw>MODMIN ? moduleHw-1 : modulePrelude);
1613 #define scriptThis(nm,t,tag) Script nm(x) \
1617 && x>=scripts[s].tag) \
1621 scriptThis(scriptThisName,Name,nameHw)
1622 scriptThis(scriptThisTycon,Tycon,tyconHw)
1623 scriptThis(scriptThisInst,Inst,instHw)
1624 scriptThis(scriptThisClass,Class,classHw)
1627 Module moduleOfScript(s)
1629 return (s==0) ? modulePrelude : scripts[s-1].moduleHw;
1632 String fileOfModule(m)
1635 if (m == modulePrelude) {
1638 for(s=0; s<scriptHw; ++s) {
1639 if (scripts[s].moduleHw == m) {
1640 return textToStr(scripts[s].file);
1646 Script scriptThisFile(f)
1649 for (s=0; s < scriptHw; ++s) {
1650 if (scripts[s].file == f) {
1654 if (f == findText(STD_PRELUDE)) {
1660 Void dropScriptsFrom(sno) /* Restore storage to state prior */
1661 Script sno; { /* to reading script sno */
1662 if (sno<scriptHw) { /* is there anything to restore? */
1664 textHw = scripts[sno].textHw;
1665 nextNewText = scripts[sno].nextNewText;
1666 nextNewDText = scripts[sno].nextNewDText;
1667 moduleHw = scripts[sno].moduleHw;
1668 tyconHw = scripts[sno].tyconHw;
1669 nameHw = scripts[sno].nameHw;
1670 classHw = scripts[sno].classHw;
1671 instHw = scripts[sno].instHw;
1673 dictHw = scripts[sno].dictHw;
1676 extHw = scripts[sno].extHw;
1680 for (i=moduleHw; i >= scripts[sno].moduleHw; --i) {
1681 if (module(i).objectFile) {
1682 printf("[bogus] closing objectFile for module %d\n",i);
1683 /*dlclose(module(i).objectFile);*/
1686 moduleHw = scripts[sno].moduleHw;
1688 for (i=0; i<TEXTHSZ; ++i) {
1690 while (j<NUM_TEXTH && textHash[i][j]!=NOTEXT
1691 && textHash[i][j]<textHw)
1694 textHash[i][j] = NOTEXT;
1698 for (i=0; i<TYCONHSZ; ++i) {
1701 for (i=0; i<NAMEHSZ; ++i) {
1705 for (i=CLASSMIN; i<classHw; i++) {
1706 List ins = cclass(i).instances;
1709 while (nonNull(ins)) {
1710 List temp = tl(ins);
1711 if (hd(ins)<instHw) {
1717 cclass(i).instances = rev(is);
1724 /* --------------------------------------------------------------------------
1727 * Provides a garbage collectable heap for storage of expressions etc.
1729 * Now incorporates a flat resource: A two-space collected extension of
1730 * the heap that provides storage for contiguous arrays of Cell storage,
1731 * cooperating with the garbage collection mechanisms for the main heap.
1732 * ------------------------------------------------------------------------*/
1734 Int heapSize = DEFAULTHEAP; /* number of cells in heap */
1735 Heap heapFst; /* array of fst component of pairs */
1736 Heap heapSnd; /* array of snd component of pairs */
1743 Bool consGC = TRUE; /* Set to FALSE to turn off gc from*/
1744 /* C stack; use with extreme care! */
1746 Int numGcs; /* number of garbage collections */
1747 Int cellsRecovered; /* number of cells recovered */
1749 static Cell freeList; /* free list of unused cells */
1750 static Cell lsave, rsave; /* save components of pair */
1754 static Int markCount, stackRoots;
1756 #define initStackRoots() stackRoots = 0
1757 #define recordStackRoot() stackRoots++
1770 #define start() markCount = 0
1771 #define end(thing,rs) \
1773 Printf("GC: %-18s: %4d cells, %4d roots.\n", thing, markCount, rs); \
1776 #define recordMark() markCount++
1778 #else /* !GC_STATISTICS */
1783 #define initStackRoots()
1784 #define recordStackRoot()
1787 #define end(thing,root)
1788 #define recordMark()
1790 #endif /* !GC_STATISTICS */
1792 Cell pair(l,r) /* Allocate pair (l, r) from */
1793 Cell l, r; { /* heap, garbage collecting first */
1794 Cell c = freeList; /* if necessary ... */
1806 freeList = snd(freeList);
1813 Void overwrite(dst,src) /* overwrite dst cell with src cell*/
1814 Cell dst, src; { /* both *MUST* be pairs */
1815 if (isPair(dst) && isPair(src)) {
1816 fst(dst) = fst(src);
1817 snd(dst) = snd(src);
1820 internal("overwrite");
1824 static Int marksSize;
1826 Cell markExpr(c) /* External interface to markCell */
1828 return isGenPair(c) ? markCell(c) : c;
1831 static Cell local markCell(c) /* Traverse part of graph marking */
1832 Cell c; { /* cells reachable from given root */
1833 /* markCell(c) is only called if c */
1835 { register int place = placeInSet(c);
1836 register int mask = maskInSet(c);
1837 if (marks[place]&mask)
1840 marks[place] |= mask;
1845 /* STACK_CHECK: Avoid stack overflows during recursive marking. */
1846 if (isGenPair(fst(c))) {
1848 fst(c) = markCell(fst(c));
1851 else if (isNull(fst(c)) || fst(c)>=BCSTAG) {
1859 static Void local markSnd(c) /* Variant of markCell used to */
1860 Cell c; { /* update snd component of cell */
1861 Cell t; /* using tail recursion */
1863 ma: t = c; /* Keep pointer to original pair */
1868 { register int place = placeInSet(c);
1869 register int mask = maskInSet(c);
1870 if (marks[place]&mask)
1873 marks[place] |= mask;
1878 if (isGenPair(fst(c))) {
1879 fst(c) = markCell(fst(c));
1882 else if (isNull(fst(c)) || fst(c)>=BCSTAG)
1887 Void markWithoutMove(n) /* Garbage collect cell at n, as if*/
1888 Cell n; { /* it was a cell ref, but don't */
1889 /* move cell so we don't have */
1890 /* to modify the stored value of n */
1897 Void garbageCollect() { /* Run garbage collector ... */
1898 Bool breakStat = breakOn(FALSE); /* disable break checking */
1904 jmp_buf regs; /* save registers on stack */
1908 for (i=0; i<marksSize; ++i) /* initialise mark set to empty */
1911 everybody(MARK); /* Mark all components of system */
1913 gcScanning(); /* scan mark set */
1920 for (i=1; i<=heapSize; i++) {
1921 if ((marks[place] & mask) == 0) {
1928 if (++j == bitsPerWord) {
1935 gcRecovered(recovered);
1936 breakOn(breakStat); /* restore break trapping if nec. */
1940 /* can only return if freeList is nonempty on return. */
1941 if (recovered<minRecovery || isNull(freeList)) {
1942 ERRMSG(0) "Garbage collection fails to reclaim sufficient space"
1945 cellsRecovered = recovered;
1948 /* --------------------------------------------------------------------------
1949 * Code for saving last expression entered:
1951 * This is a little tricky because some text values (e.g. strings or variable
1952 * names) may not be defined or have the same value when the expression is
1953 * recalled. These text values are therefore saved in the top portion of
1955 * ------------------------------------------------------------------------*/
1957 static Cell lastExprSaved; /* last expression to be saved */
1959 Void setLastExpr(e) /* save expression for later recall*/
1961 lastExprSaved = NIL; /* in case attempt to save fails */
1962 savedText = NUM_TEXT;
1963 lastExprSaved = lowLevelLastIn(e);
1966 static Cell local lowLevelLastIn(c) /* Duplicate expression tree (i.e. */
1967 Cell c; { /* acyclic graph) for later recall */
1968 if (isPair(c)) { /* Duplicating any text strings */
1969 if (isBoxTag(fst(c))) /* in case these are lost at some */
1970 switch (fst(c)) { /* point before the expr is reused */
1976 case STRCELL : return pair(fst(c),saveText(textOf(c)));
1977 default : return pair(fst(c),snd(c));
1980 return pair(lowLevelLastIn(fst(c)),lowLevelLastIn(snd(c)));
1984 return pair(EXTCOPY,saveText(extText(c)));
1990 Cell getLastExpr() { /* recover previously saved expr */
1991 return lowLevelLastOut(lastExprSaved);
1994 static Cell local lowLevelLastOut(c) /* As with lowLevelLastIn() above */
1995 Cell c; { /* except that Cells refering to */
1996 if (isPair(c)) { /* Text values are restored to */
1997 if (isBoxTag(fst(c))) /* appropriate values */
2004 case STRCELL : return pair(fst(c),
2005 findText(text+intValOf(c)));
2007 case EXTCOPY : return mkExt(findText(text+intValOf(c)));
2009 default : return pair(fst(c),snd(c));
2012 return pair(lowLevelLastOut(fst(c)),lowLevelLastOut(snd(c)));
2018 /* --------------------------------------------------------------------------
2019 * Miscellaneous operations on heap cells:
2020 * ------------------------------------------------------------------------*/
2022 /* Profiling suggests that the number of calls to whatIs() is typically */
2023 /* rather high. The recoded version below attempts to improve the average */
2024 /* performance for whatIs() using a binary search for part of the analysis */
2026 Cell whatIs(c) /* identify type of cell */
2029 register Cell fstc = fst(c);
2030 return isTag(fstc) ? fstc : AP;
2032 if (c<OFFMIN) return c;
2034 if (isExt(c)) return EXT;
2036 if (c>=INTMIN) return INTCELL;
2038 if (c>=NAMEMIN){if (c>=CLASSMIN) {if (c>=CHARMIN) return CHARCELL;
2040 else if (c>=INSTMIN) return INSTANCE;
2042 else if (c>=MODMIN) {if (c>=TYCMIN) return isTuple(c) ? TUPLE : TYCON;
2043 else return MODULE;}
2044 else if (c>=OFFMIN) return OFFSET;
2046 else return (c>=EXTMIN) ?
2053 register Cell fstc = fst(c);
2054 return isTag(fstc) ? fstc : AP;
2056 if (c>=INTMIN) return INTCELL;
2057 if (c>=CHARMIN) return CHARCELL;
2058 if (c>=CLASSMIN) return CLASS;
2059 if (c>=INSTMIN) return INSTANCE;
2060 if (c>=NAMEMIN) return NAME;
2061 if (c>=TYCMIN) return TYCON;
2062 if (c>=MODMIN) return MODULE;
2063 if (c>=OFFMIN) return OFFSET;
2065 if (c>=EXTMIN) return EXT;
2067 if (c>=TUPMIN) return TUPLE;
2072 /* A very, very simple printer.
2073 * Output is uglier than from printExp - but the printer is more
2074 * robust and can be used on any data structure irrespective of
2077 Void print Args((Cell, Int));
2078 Void print(c, depth)
2083 #if 0 /* Not in this version of Hugs */
2084 } else if (isPair(c) && !isGenPair(c)) {
2085 extern Void printEvalCell Args((Cell, Int));
2086 printEvalCell(c,depth);
2089 Int tag = whatIs(c);
2093 print(fst(c), depth-1);
2095 print(snd(c), depth-1);
2099 Printf("free(%d)", c);
2102 Printf("int(%d)", intOf(c));
2105 Printf("bignum(%s)", bignumToString(c));
2108 Printf("char('%c')", charOf(c));
2111 Printf("ptr(%p)",ptrOf(c));
2114 Printf("class(%d)", c-CLASSMIN);
2115 if (CLASSMIN <= c && c < classHw) {
2116 Printf("=\"%s\"", textToStr(cclass(c).text));
2120 Printf("instance(%d)", c - INSTMIN);
2123 Printf("name(%d)", c-NAMEMIN);
2124 if (NAMEMIN <= c && c < nameHw) {
2125 Printf("=\"%s\"", textToStr(name(c).text));
2129 Printf("tycon(%d)", c-TYCMIN);
2130 if (TYCMIN <= c && c < tyconHw)
2131 Printf("=\"%s\"", textToStr(tycon(c).text));
2134 Printf("module(%d)", c - MODMIN);
2137 Printf("Offset %d", offsetOf(c));
2140 Printf("%s", textToStr(ghcTupleText(c)));
2144 print(snd(c),depth-1);
2148 print(snd(c),depth-1);
2152 if (isPair(snd(c)) && isInt(fst(snd(c)))) {
2153 Printf("%d ", intOf(fst(snd(c))));
2154 print(snd(snd(c)),depth-1);
2156 print(snd(c),depth-1);
2173 Printf("{dict %d}",textOf(c));
2179 Printf("{id %s}",textToStr(textOf(c)));
2183 Printf("{ip %s}",textToStr(textOf(c)));
2186 Printf("?%s",textToStr(textOf(c)));
2190 Printf("{qid %s.%s}",textToStr(qmodOf(c)),textToStr(qtextOf(c)));
2194 print(fst(snd(c)),depth-1);
2196 print(snd(snd(c)),depth-1);
2201 print(snd(c),depth-1);
2206 print(snd(c),depth-1);
2211 print(fst(snd(c)),depth-1);
2213 print(snd(snd(c)),depth-1);
2218 print(fst(snd(c)),depth-1);
2220 print(snd(snd(c)),depth-1);
2224 Printf("FromQual(");
2225 print(fst(snd(c)),depth-1);
2227 print(snd(snd(c)),depth-1);
2231 Printf("StgVar%d=",-c);
2232 print(snd(c), depth-1);
2236 print(fst(snd(c)),depth-1);
2238 print(snd(snd(c)),depth-1);
2243 print(fst(snd(c)),depth-1);
2245 print(snd(snd(c)),depth-1);
2250 print(fst(snd(c)),depth-1);
2252 print(snd(snd(c)),depth-1);
2256 Printf("PrimCase(");
2257 print(fst(snd(c)),depth-1);
2259 print(snd(snd(c)),depth-1);
2264 print(snd(c),depth-1);
2268 Printf("(UNBOXEDTUP,");
2269 print(snd(c),depth-1);
2274 print(zfst(c),depth-1);
2276 print(zsnd(c),depth-1);
2280 Printf("<ZTriple ");
2281 print(zfst3(c),depth-1);
2283 print(zsnd3(c),depth-1);
2285 print(zthd3(c),depth-1);
2290 print(snd(c),depth-1);
2294 if (isBoxTag(tag)) {
2295 Printf("Tag(%d)=%d", c, tag);
2296 } else if (isConTag(tag)) {
2297 Printf("%d@(%d,",c,tag);
2298 print(snd(c), depth-1);
2301 } else if (c == tag) {
2302 Printf("Tag(%d)", c);
2304 Printf("Tag(%d)=%d", c, tag);
2313 Bool isVar(c) /* is cell a VARIDCELL/VAROPCELL ? */
2314 Cell c; { /* also recognises DICTVAR cells */
2316 (fst(c)==VARIDCELL || fst(c)==VAROPCELL || fst(c)==DICTVAR);
2319 Bool isCon(c) /* is cell a CONIDCELL/CONOPCELL ? */
2321 return isPair(c) && (fst(c)==CONIDCELL || fst(c)==CONOPCELL);
2324 Bool isQVar(c) /* is cell a [un]qualified varop/id? */
2326 if (!isPair(c)) return FALSE;
2329 case VAROPCELL : return TRUE;
2331 case QUALIDENT : return isVar(snd(snd(c)));
2333 default : return FALSE;
2337 Bool isQCon(c) /*is cell a [un]qualified conop/id? */
2339 if (!isPair(c)) return FALSE;
2342 case CONOPCELL : return TRUE;
2344 case QUALIDENT : return isCon(snd(snd(c)));
2346 default : return FALSE;
2350 Bool isQualIdent(c) /* is cell a qualified identifier? */
2352 return isPair(c) && (fst(c)==QUALIDENT);
2355 Bool eqQualIdent ( QualId c1, QualId c2 )
2357 assert(isQualIdent(c1));
2358 if (!isQualIdent(c2)) {
2359 assert(isQualIdent(c2));
2361 return qmodOf(c1)==qmodOf(c2) &&
2362 qtextOf(c1)==qtextOf(c2);
2365 Bool isIdent(c) /* is cell an identifier? */
2367 if (!isPair(c)) return FALSE;
2372 case CONOPCELL : return TRUE;
2374 case QUALIDENT : return TRUE;
2376 default : return FALSE;
2380 Bool isInt(c) /* cell holds integer value? */
2382 return isSmall(c) || (isPair(c) && fst(c)==INTCELL);
2385 Int intOf(c) /* find integer value of cell? */
2389 return isPair(c) ? (Int)(snd(c)) : (Int)(c-INTZERO);
2392 Cell mkInt(n) /* make cell representing integer */
2394 return (MINSMALLINT <= n && n <= MAXSMALLINT)
2399 #if SIZEOF_INTP == SIZEOF_INT
2400 typedef union {Int i; Ptr p;} IntOrPtr;
2406 return pair(PTRCELL,x.i);
2413 assert(fst(c) == PTRCELL);
2422 return pair(CPTRCELL,x.i);
2429 assert(fst(c) == CPTRCELL);
2433 #elif SIZEOF_INTP == 2*SIZEOF_INT
2434 typedef union {struct {Int i1; Int i2;} i; Ptr p;} IntOrPtr;
2440 return pair(PTRCELL,pair(mkInt(x.i.i1),mkInt(x.i.i2)));
2447 assert(fst(c) == PTRCELL);
2448 x.i.i1 = intOf(fst(snd(c)));
2449 x.i.i2 = intOf(snd(snd(c)));
2453 #warning "type Addr not supported on this architecture - don't use it"
2457 ERRMSG(0) "mkPtr: type Addr not supported on this architecture"
2464 ERRMSG(0) "ptrOf: type Addr not supported on this architecture"
2469 String stringNegate( s )
2477 strcpy(&t[1],s); /* ToDo: use strncpy instead */
2482 /* --------------------------------------------------------------------------
2484 * ------------------------------------------------------------------------*/
2486 Int length(xs) /* calculate length of list xs */
2489 for (; nonNull(xs); ++n)
2494 List appendOnto(xs,ys) /* Destructively prepend xs onto */
2495 List xs, ys; { /* ys by modifying xs ... */
2500 while (nonNull(tl(zs)))
2507 List dupOnto(xs,ys) /* non-destructively prepend xs backwards onto ys */
2510 for (; nonNull(xs); xs=tl(xs))
2511 ys = cons(hd(xs),ys);
2515 List dupListOnto(xs,ys) /* Duplicate spine of list xs onto ys */
2518 return revOnto(dupOnto(xs,NIL),ys);
2521 List dupList(xs) /* Duplicate spine of list xs */
2524 for (; nonNull(xs); xs=tl(xs))
2525 ys = cons(hd(xs),ys);
2529 List revOnto(xs,ys) /* Destructively reverse elements of*/
2530 List xs, ys; { /* list xs onto list ys... */
2533 while (nonNull(xs)) {
2542 QualId qualidIsMember ( QualId q, List xs )
2544 for (; nonNull(xs); xs=tl(xs)) {
2545 if (eqQualIdent(q, hd(xs)))
2551 Cell varIsMember(t,xs) /* Test if variable is a member of */
2552 Text t; /* given list of variables */
2554 for (; nonNull(xs); xs=tl(xs))
2555 if (t==textOf(hd(xs)))
2560 Name nameIsMember(t,ns) /* Test if name with text t is a */
2561 Text t; /* member of list of names xs */
2563 for (; nonNull(ns); ns=tl(ns))
2564 if (t==name(hd(ns)).text)
2569 Cell intIsMember(n,xs) /* Test if integer n is member of */
2570 Int n; /* given list of integers */
2572 for (; nonNull(xs); xs=tl(xs))
2573 if (n==intOf(hd(xs)))
2578 Cell cellIsMember(x,xs) /* Test for membership of specific */
2579 Cell x; /* cell x in list xs */
2581 for (; nonNull(xs); xs=tl(xs))
2587 Cell cellAssoc(c,xs) /* Lookup cell in association list */
2590 for (; nonNull(xs); xs=tl(xs))
2596 Cell cellRevAssoc(c,xs) /* Lookup cell in range of */
2597 Cell c; /* association lists */
2599 for (; nonNull(xs); xs=tl(xs))
2605 List replicate(n,x) /* create list of n copies of x */
2614 List diffList(from,take) /* list difference: from\take */
2615 List from, take; { /* result contains all elements of */
2616 List result = NIL; /* `from' not appearing in `take' */
2618 while (nonNull(from)) {
2619 List next = tl(from);
2620 if (!cellIsMember(hd(from),take)) {
2629 List deleteCell(xs, y) /* copy xs deleting pointers to y */
2633 for(;nonNull(xs);xs=tl(xs)) {
2636 result=cons(x,result);
2642 List take(n,xs) /* destructively truncate list to */
2643 Int n; /* specified length */
2649 while (1<n-- && nonNull(xs))
2656 List splitAt(n,xs) /* drop n things from front of list*/
2665 Cell nth(n,xs) /* extract n'th element of list */
2668 for(; n>0 && nonNull(xs); --n, xs=tl(xs)) {
2675 List removeCell(x,xs) /* destructively remove cell from */
2680 return tl(xs); /* element at front of list */
2684 for (; nonNull(curr); prev=curr, curr=tl(prev))
2686 tl(prev) = tl(curr);
2687 return xs; /* element in middle of list */
2691 return xs; /* here if element not found */
2694 List nubList(xs) /* nuke dups in list */
2695 List xs; { /* non destructive */
2697 for (; nonNull(xs); xs=tl(xs))
2698 if (isNull(cellIsMember(hd(xs),outs)))
2699 outs = cons(hd(xs),outs);
2705 /* --------------------------------------------------------------------------
2706 * Strongly-typed lists (z-lists) and tuples (experimental)
2707 * ------------------------------------------------------------------------*/
2709 static void z_tag_check ( Cell x, int tag, char* caller )
2713 sprintf(buf,"z_tag_check(%s): null\n", caller);
2716 if (whatIs(x) != tag) {
2718 "z_tag_check(%s): tag was %d, expected %d\n",
2719 caller, whatIs(x), tag );
2725 Cell zcons ( Cell x, Cell xs )
2727 if (!(isNull(xs) || whatIs(xs)==ZCONS))
2728 internal("zcons: ill typed tail");
2729 return ap(ZCONS,ap(x,xs));
2732 Cell zhd ( Cell xs )
2734 if (isNull(xs)) internal("zhd: empty list");
2735 z_tag_check(xs,ZCONS,"zhd");
2736 return fst( snd(xs) );
2739 Cell ztl ( Cell xs )
2741 if (isNull(xs)) internal("ztl: empty list");
2742 z_tag_check(xs,ZCONS,"zhd");
2743 return snd( snd(xs) );
2746 Int zlength ( ZList xs )
2749 while (nonNull(xs)) {
2750 z_tag_check(xs,ZCONS,"zlength");
2752 xs = snd( snd(xs) );
2757 ZList zreverse ( ZList xs )
2760 while (nonNull(xs)) {
2761 z_tag_check(xs,ZCONS,"zreverse");
2762 rev = zcons(zhd(xs),rev);
2768 Cell zsingleton ( Cell x )
2770 return zcons (x,NIL);
2773 Cell zdoubleton ( Cell x, Cell y )
2775 return zcons(x,zcons(y,NIL));
2779 Cell zpair ( Cell x1, Cell x2 )
2780 { return ap(ZTUP2,ap(x1,x2)); }
2781 Cell zfst ( Cell zpair )
2782 { z_tag_check(zpair,ZTUP2,"zfst"); return fst( snd(zpair) ); }
2783 Cell zsnd ( Cell zpair )
2784 { z_tag_check(zpair,ZTUP2,"zsnd"); return snd( snd(zpair) ); }
2786 Cell ztriple ( Cell x1, Cell x2, Cell x3 )
2787 { return ap(ZTUP3,ap(x1,ap(x2,x3))); }
2788 Cell zfst3 ( Cell zpair )
2789 { z_tag_check(zpair,ZTUP3,"zfst3"); return fst( snd(zpair) ); }
2790 Cell zsnd3 ( Cell zpair )
2791 { z_tag_check(zpair,ZTUP3,"zsnd3"); return fst(snd( snd(zpair) )); }
2792 Cell zthd3 ( Cell zpair )
2793 { z_tag_check(zpair,ZTUP3,"zthd3"); return snd(snd( snd(zpair) )); }
2795 Cell z4ble ( Cell x1, Cell x2, Cell x3, Cell x4 )
2796 { return ap(ZTUP4,ap(x1,ap(x2,ap(x3,x4)))); }
2797 Cell zsel14 ( Cell zpair )
2798 { z_tag_check(zpair,ZTUP4,"zsel14"); return fst( snd(zpair) ); }
2799 Cell zsel24 ( Cell zpair )
2800 { z_tag_check(zpair,ZTUP4,"zsel24"); return fst(snd( snd(zpair) )); }
2801 Cell zsel34 ( Cell zpair )
2802 { z_tag_check(zpair,ZTUP4,"zsel34"); return fst(snd(snd( snd(zpair) ))); }
2803 Cell zsel44 ( Cell zpair )
2804 { z_tag_check(zpair,ZTUP4,"zsel44"); return snd(snd(snd( snd(zpair) ))); }
2806 Cell z5ble ( Cell x1, Cell x2, Cell x3, Cell x4, Cell x5 )
2807 { return ap(ZTUP5,ap(x1,ap(x2,ap(x3,ap(x4,x5))))); }
2808 Cell zsel15 ( Cell zpair )
2809 { z_tag_check(zpair,ZTUP5,"zsel15"); return fst( snd(zpair) ); }
2810 Cell zsel25 ( Cell zpair )
2811 { z_tag_check(zpair,ZTUP5,"zsel25"); return fst(snd( snd(zpair) )); }
2812 Cell zsel35 ( Cell zpair )
2813 { z_tag_check(zpair,ZTUP5,"zsel35"); return fst(snd(snd( snd(zpair) ))); }
2814 Cell zsel45 ( Cell zpair )
2815 { z_tag_check(zpair,ZTUP5,"zsel45"); return fst(snd(snd(snd( snd(zpair) )))); }
2816 Cell zsel55 ( Cell zpair )
2817 { z_tag_check(zpair,ZTUP5,"zsel55"); return snd(snd(snd(snd( snd(zpair) )))); }
2820 Cell unap ( int tag, Cell c )
2823 if (whatIs(c) != tag) {
2824 sprintf(buf, "unap: specified %d, actual %d\n",
2831 /* --------------------------------------------------------------------------
2832 * Operations on applications:
2833 * ------------------------------------------------------------------------*/
2835 Int argCount; /* number of args in application */
2837 Cell getHead(e) /* get head cell of application */
2838 Cell e; { /* set number of args in argCount */
2839 for (argCount=0; isAp(e); e=fun(e))
2844 List getArgs(e) /* get list of arguments in function*/
2845 Cell e; { /* application: */
2846 List as; /* getArgs(f e1 .. en) = [e1,..,en] */
2848 for (as=NIL; isAp(e); e=fun(e))
2849 as = cons(arg(e),as);
2853 Cell nthArg(n,e) /* return nth arg in application */
2854 Int n; /* of function to m args (m>=n) */
2855 Cell e; { /* nthArg n (f x0 x1 ... xm) = xn */
2856 for (n=numArgs(e)-n-1; n>0; n--)
2861 Int numArgs(e) /* find number of arguments to expr */
2864 for (n=0; isAp(e); e=fun(e))
2869 Cell applyToArgs(f,args) /* destructively apply list of args */
2870 Cell f; /* to function f */
2872 while (nonNull(args)) {
2873 Cell temp = tl(args);
2874 tl(args) = hd(args);
2883 /* --------------------------------------------------------------------------
2885 * ------------------------------------------------------------------------*/
2887 /*---------------------------------------------------------------------------
2888 * GreenCard entry points
2890 * GreenCard generated code accesses Hugs data structures and functions
2891 * (only) via these functions (which are stored in the virtual function
2893 *-------------------------------------------------------------------------*/
2897 static Cell makeTuple Args((Int));
2898 static Cell makeInt Args((Int));
2899 static Cell makeChar Args((Char));
2900 static Char CharOf Args((Cell));
2901 static Cell makeFloat Args((FloatPro));
2902 static Void* derefMallocPtr Args((Cell));
2903 static Cell* Fst Args((Cell));
2904 static Cell* Snd Args((Cell));
2906 static Cell makeTuple(n) Int n; { return mkTuple(n); }
2907 static Cell makeInt(n) Int n; { return mkInt(n); }
2908 static Cell makeChar(n) Char n; { return mkChar(n); }
2909 static Char CharOf(n) Cell n; { return charOf(n); }
2910 static Cell makeFloat(n) FloatPro n; { return mkFloat(n); }
2911 static Void* derefMallocPtr(n) Cell n; { return derefMP(n); }
2912 static Cell* Fst(n) Cell n; { return (Cell*)&fst(n); }
2913 static Cell* Snd(n) Cell n; { return (Cell*)&snd(n); }
2915 HugsAPI1* hugsAPI1() {
2916 static HugsAPI1 api;
2917 static Bool initialised = FALSE;
2919 api.nameTrue = nameTrue;
2920 api.nameFalse = nameFalse;
2921 api.nameNil = nameNil;
2922 api.nameCons = nameCons;
2923 api.nameJust = nameJust;
2924 api.nameNothing = nameNothing;
2925 api.nameLeft = nameLeft;
2926 api.nameRight = nameRight;
2927 api.nameUnit = nameUnit;
2928 api.nameIORun = nameIORun;
2929 api.makeInt = makeInt;
2930 api.makeChar = makeChar;
2931 api.CharOf = CharOf;
2932 api.makeFloat = makeFloat;
2933 api.makeTuple = makeTuple;
2935 api.mkMallocPtr = mkMallocPtr;
2936 api.derefMallocPtr = derefMallocPtr;
2937 api.mkStablePtr = mkStablePtr;
2938 api.derefStablePtr = derefStablePtr;
2939 api.freeStablePtr = freeStablePtr;
2941 api.evalWithNoError = evalWithNoError;
2942 api.evalFails = evalFails;
2943 api.whnfArgs = &whnfArgs;
2944 api.whnfHead = &whnfHead;
2945 api.whnfInt = &whnfInt;
2946 api.whnfFloat = &whnfFloat;
2947 api.garbageCollect = garbageCollect;
2948 api.stackOverflow = hugsStackOverflow;
2949 api.internal = internal;
2950 api.registerPrims = registerPrims;
2951 api.addPrimCfun = addPrimCfun;
2952 api.inventText = inventText;
2955 api.cellStack = cellStack;
2961 #endif /* GREENCARD */
2964 /* --------------------------------------------------------------------------
2966 * ------------------------------------------------------------------------*/
2969 static void far* safeFarCalloc Args((Int,Int));
2970 static void far* safeFarCalloc(n,s) /* allocate table storage and check*/
2971 Int n, s; { /* for non-null return */
2972 void far* tab = farCalloc(n,s);
2974 ERRMSG(0) "Cannot allocate run-time tables"
2979 #define TABALLOC(v,t,n) v=(t far*)safeFarCalloc(n,sizeof(t));
2981 #define TABALLOC(v,t,n)
2989 case POSTPREL: break;
2991 case RESET : clearStack();
2993 /* the next 2 statements are particularly important
2994 * if you are using GLOBALfst or GLOBALsnd since the
2995 * corresponding registers may be reset to their
2996 * uninitialised initial values by a longjump.
2998 heapTopFst = heapFst + heapSize;
2999 heapTopSnd = heapSnd + heapSize;
3003 if (isNull(lastExprSaved))
3004 savedText = NUM_TEXT;
3009 for (i=NAMEMIN; i<nameHw; ++i) {
3010 mark(name(i).parent);
3012 mark(name(i).stgVar);
3015 end("Names", nameHw-NAMEMIN);
3018 for (i=MODMIN; i<moduleHw; ++i) {
3019 mark(module(i).tycons);
3020 mark(module(i).names);
3021 mark(module(i).classes);
3022 mark(module(i).exports);
3023 mark(module(i).qualImports);
3024 mark(module(i).objectExtraNames);
3026 end("Modules", moduleHw-MODMIN);
3029 for (i=TYCMIN; i<tyconHw; ++i) {
3030 mark(tycon(i).defn);
3031 mark(tycon(i).kind);
3032 mark(tycon(i).what);
3034 end("Type constructors", tyconHw-TYCMIN);
3037 for (i=CLASSMIN; i<classHw; ++i) {
3038 mark(cclass(i).head);
3039 mark(cclass(i).kinds);
3040 mark(cclass(i).fds);
3041 mark(cclass(i).xfds);
3042 mark(cclass(i).dsels);
3043 mark(cclass(i).supers);
3044 mark(cclass(i).members);
3045 mark(cclass(i).defaults);
3046 mark(cclass(i).instances);
3049 end("Classes", classHw-CLASSMIN);
3052 for (i=INSTMIN; i<instHw; ++i) {
3054 mark(inst(i).kinds);
3055 mark(inst(i).specifics);
3056 mark(inst(i).implements);
3058 end("Instances", instHw-INSTMIN);
3061 for (i=0; i<=sp; ++i)
3066 mark(lastExprSaved);
3069 end("Last expression", 3);
3074 end("C stack", stackRoots);
3079 case PREPREL : heapFst = heapAlloc(heapSize);
3080 heapSnd = heapAlloc(heapSize);
3082 if (heapFst==(Heap)0 || heapSnd==(Heap)0) {
3083 ERRMSG(0) "Cannot allocate heap storage (%d cells)",
3088 heapTopFst = heapFst + heapSize;
3089 heapTopSnd = heapSnd + heapSize;
3090 for (i=1; i<heapSize; ++i) {
3094 snd(-heapSize) = NIL;
3101 marksSize = bitArraySize(heapSize);
3102 if ((marks=(Int *)calloc(marksSize, sizeof(Int)))==0) {
3103 ERRMSG(0) "Unable to allocate gc markspace"
3107 TABALLOC(text, char, NUM_TEXT)
3108 TABALLOC(tyconHash, Tycon, TYCONHSZ)
3109 TABALLOC(tabTycon, struct strTycon, NUM_TYCON)
3110 TABALLOC(nameHash, Name, NAMEHSZ)
3111 TABALLOC(tabName, struct strName, NUM_NAME)
3112 TABALLOC(tabClass, struct strClass, NUM_CLASSES)
3113 TABALLOC(cellStack, Cell, NUM_STACK)
3114 TABALLOC(tabModule, struct Module, NUM_SCRIPTS)
3116 TABALLOC(tabExt, Text, NUM_EXT)
3121 nextNewText = NUM_TEXT;
3122 nextNewDText = (-1);
3123 lastExprSaved = NIL;
3124 savedText = NUM_TEXT;
3125 for (i=0; i<TEXTHSZ; ++i)
3126 textHash[i][0] = NOTEXT;
3132 for (i=0; i<TYCONHSZ; ++i)
3139 for (i=0; i<NAMEHSZ; ++i)
3150 tabInst = (struct strInst far *)
3151 farCalloc(NUM_INSTS,sizeof(struct strInst));
3154 ERRMSG(0) "Cannot allocate instance tables"
3164 /*-------------------------------------------------------------------------*/