2 /* --------------------------------------------------------------------------
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: hugs.c,v $
13 * $Date: 1999/11/09 00:40:11 $
14 * ------------------------------------------------------------------------*/
34 Bool haskell98 = TRUE; /* TRUE => Haskell 98 compatibility*/
36 #if EXPLAIN_INSTANCE_RESOLUTION
37 Bool showInstRes = FALSE;
40 Bool multiInstRes = FALSE;
43 /* --------------------------------------------------------------------------
44 * Local function prototypes:
45 * ------------------------------------------------------------------------*/
47 static Void local initialize Args((Int,String []));
48 static Void local promptForInput Args((String));
49 static Void local interpreter Args((Int,String []));
50 static Void local menu Args((Void));
51 static Void local guidance Args((Void));
52 static Void local forHelp Args((Void));
53 static Void local set Args((Void));
54 static Void local changeDir Args((Void));
55 static Void local load Args((Void));
56 static Void local project Args((Void));
57 static Void local readScripts Args((Int));
58 static Void local whatScripts Args((Void));
59 static Void local editor Args((Void));
60 static Void local find Args((Void));
61 static Bool local startEdit Args((Int,String));
62 static Void local runEditor Args((Void));
63 static Void local setModule Args((Void));
64 static Module local findEvalModule Args((Void));
65 static Void local evaluator Args((Void));
66 static Void local stopAnyPrinting Args((Void));
67 static Void local showtype Args((Void));
68 static String local objToStr Args((Module, Cell));
69 static Void local info Args((Void));
70 static Void local printSyntax Args((Name));
71 static Void local showInst Args((Inst));
72 static Void local describe Args((Text));
73 static Void local listNames Args((Void));
75 static Void local toggleSet Args((Char,Bool));
76 static Void local togglesIn Args((Bool));
77 static Void local optionInfo Args((Void));
78 #if USE_REGISTRY || HUGS_FOR_WINDOWS
79 static String local optionsToStr Args((Void));
81 static Void local readOptions Args((String));
82 static Bool local processOption Args((String));
83 static Void local setHeapSize Args((String));
84 static Int local argToInt Args((String));
86 static Void local loadProject Args((String));
87 static Void local clearProject Args((Void));
88 static Bool local addScript Args((Int));
89 static Void local forgetScriptsFrom Args((Script));
90 static Void local setLastEdit Args((String,Int));
91 static Void local failed Args((Void));
92 static String local strCopy Args((String));
93 static Void local browseit Args((Module,String));
94 static Void local browse Args((Void));
96 /* --------------------------------------------------------------------------
97 * Machine dependent code for Hugs interpreter:
98 * ------------------------------------------------------------------------*/
105 /* --------------------------------------------------------------------------
107 * ------------------------------------------------------------------------*/
109 static Bool printing = FALSE; /* TRUE => currently printing value*/
110 static Bool showStats = FALSE; /* TRUE => print stats after eval */
111 static Bool listScripts = TRUE; /* TRUE => list scripts after loading*/
112 static Bool addType = FALSE; /* TRUE => print type with value */
113 static Bool useDots = RISCOS; /* TRUE => use dots in progress */
114 static Bool quiet = FALSE; /* TRUE => don't show progress */
115 static Bool lastWasObject = FALSE;
116 Bool preludeLoaded = FALSE;
117 Bool optimise = FALSE;
121 String modName; /* Module name */
122 Bool details; /* FALSE => remaining fields are invalid */
123 String path; /* Path to module */
124 String srcExt; /* ".hs" or ".lhs" if fromSource */
125 Time lastChange; /* Time of last change to script */
126 Bool fromSource; /* FALSE => load object code */
127 Bool postponed; /* Indicates postponed load */
134 static Void local makeStackEntry Args((ScriptInfo*,String));
135 static Void local addStackEntry Args((String));
137 static ScriptInfo scriptInfo[NUM_SCRIPTS];
139 static Int numScripts; /* Number of scripts loaded */
140 static Int nextNumScripts;
141 static Int namesUpto; /* Number of script names set */
142 static Bool needsImports; /* set to TRUE if imports required */
143 String scriptFile; /* Name of current script (if any) */
147 static Text evalModule = 0; /* Name of module we eval exprs in */
148 static String currProject = 0; /* Name of current project file */
149 static Bool projectLoaded = FALSE; /* TRUE => project file loaded */
151 static Bool autoMain = FALSE;
152 static String lastEdit = 0; /* Name of script to edit (if any) */
153 static Int lastEdLine = 0; /* Editor line number (if possible)*/
154 static String prompt = 0; /* Prompt string */
155 static Int hpSize = DEFAULTHEAP; /* Desired heap size */
156 String hugsEdit = 0; /* String for editor command */
157 String hugsPath = 0; /* String for file search path */
160 static Bool disableOutput = FALSE; /* redirect output to buffer? */
163 String bool2str ( Bool b )
165 if (b) return "Yes"; else return "No ";
168 void ppSmStack ( String who )
172 fflush(stdout);fflush(stderr);
174 printf ( "ppSmStack %s: numScripts = %d namesUpto = %d needsImports = %s\n",
175 who, numScripts, namesUpto, bool2str(needsImports) );
176 assert (namesUpto >= numScripts);
177 printf ( " Det FrS Pst ObL Module Ext Size ModTime Path\n" );
178 for (i = namesUpto-1; i >= 0; i--) {
179 printf ( "%c%2d: %3s %3s %3s %3s %16s %-4s %5ld %8lx %s\n",
180 (i==numScripts ? '*' : ' '),
181 i, bool2str(scriptInfo[i].details),
182 bool2str(scriptInfo[i].fromSource),
183 bool2str(scriptInfo[i].postponed),
184 bool2str(scriptInfo[i].objLoaded),
185 scriptInfo[i].modName,
186 scriptInfo[i].fromSource ? scriptInfo[i].srcExt : "",
188 scriptInfo[i].lastChange,
193 fflush(stdout);fflush(stderr);
199 /* --------------------------------------------------------------------------
201 * ------------------------------------------------------------------------*/
203 #ifndef NO_MAIN /* we omit main when building the "Hugs server" */
205 Main main Args((Int, String [])); /* now every func has a prototype */
210 #ifdef HAVE_CONSOLE_H /* Macintosh port */
212 _fcreator = 'R*ch'; /* // 'KAHL'; //'*TEX'; //'ttxt'; */
214 console_options.top = 50;
215 console_options.left = 20;
217 console_options.nrows = 32;
218 console_options.ncols = 80;
220 console_options.pause_atexit = 1;
221 console_options.title = "\pHugs";
223 console_options.procID = 5;
224 argc = ccommand(&argv);
227 CStackBase = &argc; /* Save stack base for use in gc */
229 /* Try and figure out an absolute path to the executable, so
230 we can make a reasonable guess about where the default
231 libraries (Prelude etc) are.
233 setDefaultLibDir ( argv[0] );
235 /* If first arg is +Q or -Q, be entirely silent, and automatically run
236 main after loading scripts. Useful for running the nofib suite. */
237 if (argc > 1 && (strcmp(argv[1],"+Q") == 0 || strcmp(argv[1],"-Q")==0)) {
242 Printf("__ __ __ __ ____ ___ _________________________________________\n");
243 Printf("|| || || || || || ||__ Hugs 98: Based on the Haskell 98 standard\n");
244 Printf("||___|| ||__|| ||__|| __|| Copyright (c) 1994-1999\n");
245 Printf("||---|| ___|| World Wide Web: http://haskell.org/hugs\n");
246 Printf("|| || Report bugs to: hugs-bugs@haskell.org\n");
247 Printf("|| || Version: %s _________________________________________\n\n",HUGS_VERSION);
250 Printf(" Ported to Macintosh by Hans Aberg, compiled " __DATE__ ".\n\n");
253 interpreter(argc,argv);
254 Printf("[Leaving Hugs]\n");
265 /* --------------------------------------------------------------------------
266 * Initialization, interpret command line args and read prelude:
267 * ------------------------------------------------------------------------*/
269 static Void local initialize(argc,argv)/* Interpreter initialization */
274 char argv_0_orig[1000];
276 setLastEdit((String)0,0);
283 hugsEdit = strCopy(fromEnv("EDITOR","c:\\windows\\notepad.exe"));
287 hugsEdit = strCopy(fromEnv("EDITOR",NULL));
289 hugsPath = strCopy(HUGSPATH);
290 readOptions("-p\"%s> \" -r$$");
292 projectPath = strCopy(readRegChildStrings(HKEY_LOCAL_MACHINE,ProjectRoot,
293 "HUGSPATH", PATHSEP, ""));
294 readOptions(readRegString(HKEY_LOCAL_MACHINE,HugsRoot,"Options",""));
295 readOptions(readRegString(HKEY_CURRENT_USER, HugsRoot,"Options",""));
296 #endif /* USE_REGISTRY */
297 readOptions(fromEnv("STGHUGSFLAGS",""));
299 strncpy(argv_0_orig,argv[0],1000); /* startupHaskell mangles argv[0] */
300 startupHaskell (argc,argv);
301 argc = prog_argc; argv = prog_argv;
303 namesUpto = numScripts = 0;
304 addStackEntry("Prelude");
306 for (i=1; i<argc; ++i) { /* process command line arguments */
307 if (strcmp(argv[i], "--")==0) break;
308 if (strcmp(argv[i],"+")==0 && i+1<argc) {
310 ERRMSG(0) "Multiple project filenames on command line"
315 } else if (argv[i] && argv[i][0]/* workaround for /bin/sh silliness*/
316 && !processOption(argv[i])) {
317 addStackEntry(argv[i]);
322 DEBUG_LoadSymbols(argv_0_orig);
328 if (!scriptName[0]) {
329 Printf("Prelude not found on current path: \"%s\"\n",
330 hugsPath ? hugsPath : "");
331 fatal("Unable to load prelude");
336 Printf("Haskell 98 mode: Restart with command line option -98 to enable extensions\n\n");
338 Printf("Hugs mode: Restart with command line option +98 for Haskell 98 mode\n\n");
342 evalModule = findText(""); /* evaluate wrt last module by default */
346 "\nUsing project file, ignoring additional filenames\n");
348 loadProject(strCopy(proj));
353 /* --------------------------------------------------------------------------
354 * Command line options:
355 * ------------------------------------------------------------------------*/
357 struct options { /* command line option toggles */
358 char c; /* table defined in main app. */
363 extern struct options toggle[];
365 static Void local toggleSet(c,state) /* Set command line toggle */
369 for (i=0; toggle[i].c; ++i)
370 if (toggle[i].c == c) {
371 *toggle[i].flag = state;
374 ERRMSG(0) "Unknown toggle `%c'", c
378 static Void local togglesIn(state) /* Print current list of toggles in*/
379 Bool state; { /* given state */
382 for (i=0; toggle[i].c; ++i)
383 if (*toggle[i].flag == state && (!haskell98 || toggle[i].h98)) {
385 Putchar((char)(state ? '+' : '-'));
386 Putchar(toggle[i].c);
393 static Void local optionInfo() { /* Print information about command */
394 static String fmts = "%-5s%s\n"; /* line settings */
395 static String fmtc = "%-5c%s\n";
398 Printf("TOGGLES: groups begin with +/- to turn options on/off resp.\n");
399 for (i=0; toggle[i].c; ++i) {
400 if (!haskell98 || toggle[i].h98) {
401 Printf(fmtc,toggle[i].c,toggle[i].description);
405 Printf("\nOTHER OPTIONS: (leading + or - makes no difference)\n");
406 Printf(fmts,"hnum","Set heap size (cannot be changed within Hugs)");
407 Printf(fmts,"pstr","Set prompt string to str");
408 Printf(fmts,"rstr","Set repeat last expression string to str");
409 Printf(fmts,"Pstr","Set search path for modules to str");
410 Printf(fmts,"Estr","Use editor setting given by str");
411 Printf(fmts,"cnum","Set constraint cutoff limit");
412 #if USE_PREPROCESSOR && (defined(HAVE_POPEN) || defined(HAVE__POPEN))
413 Printf(fmts,"Fstr","Set preprocessor filter to str");
416 Printf("\nCurrent settings: ");
419 Printf("-h%d",heapSize);
423 printString(repeatStr);
424 Printf(" -c%d",cutoff);
425 Printf("\nSearch path : -P");
426 printString(hugsPath);
429 if (projectPath!=NULL) {
430 Printf("\nProject Path : %s",projectPath);
433 Printf("\nEditor setting : -E");
434 printString(hugsEdit);
435 #if USE_PREPROCESSOR && (defined(HAVE_POPEN) || defined(HAVE__POPEN))
436 Printf("\nPreprocessor : -F");
437 printString(preprocessor);
439 Printf("\nCompatibility : %s", haskell98 ? "Haskell 98 (+98)"
440 : "Hugs Extensions (-98)");
444 #if USE_REGISTRY || HUGS_FOR_WINDOWS
452 #define PUTInt(optc,i) \
453 sprintf(next,"-%c%d",optc,i); \
456 #define PUTStr(c,s) \
457 next=PUTStr_aux(next,c,s)
459 static String local PUTStr_aux Args((String,Char, String));
461 static String local PUTStr_aux(next,c,s)
467 sprintf(next,"-%c\"",c);
470 PUTS(unlexChar(*t,'"'));
478 static String local optionsToStr() { /* convert options to string */
479 static char buffer[2000];
480 String next = buffer;
483 for (i=0; toggle[i].c; ++i) {
484 PUTC(*toggle[i].flag ? '+' : '-');
488 PUTS(haskell98 ? "+98 " : "-98 ");
489 PUTInt('h',hpSize); PUTC(' ');
491 PUTStr('r',repeatStr);
492 PUTStr('P',hugsPath);
493 PUTStr('E',hugsEdit);
494 PUTInt('c',cutoff); PUTC(' ');
495 #if USE_PREPROCESSOR && (defined(HAVE_POPEN) || defined(HAVE__POPEN))
496 PUTStr('F',preprocessor);
501 #endif /* USE_REGISTRY */
508 static Void local readOptions(options) /* read options from string */
512 stringInput(options);
513 while ((s=readFilename())!=0) {
514 if (*s && !processOption(s)) {
515 ERRMSG(0) "Option string must begin with `+' or `-'"
522 static Bool local processOption(s) /* process string s for options, */
523 String s; { /* return FALSE if none found. */
535 case 'Q' : break; /* already handled */
537 case 'p' : if (s[1]) {
538 if (prompt) free(prompt);
539 prompt = strCopy(s+1);
543 case 'r' : if (s[1]) {
544 if (repeatStr) free(repeatStr);
545 repeatStr = strCopy(s+1);
550 String p = substPath(s+1,hugsPath ? hugsPath : "");
551 if (hugsPath) free(hugsPath);
556 case 'E' : if (hugsEdit) free(hugsEdit);
557 hugsEdit = strCopy(s+1);
560 #if USE_PREPROCESSOR && (defined(HAVE_POPEN) || defined(HAVE__POPEN))
561 case 'F' : if (preprocessor) free(preprocessor);
562 preprocessor = strCopy(s+1);
566 case 'h' : setHeapSize(s+1);
569 case 'D' : /* hack */
571 extern void setRtsFlags( int x );
572 setRtsFlags(argToInt(s+1));
576 default : if (strcmp("98",s)==0) {
577 if (heapBuilt() && ((state && !haskell98) ||
578 (!state && haskell98))) {
579 FPrintf(stderr,"Haskell 98 compatibility cannot be changed while the interpreter is running\n");
592 static Void local setHeapSize(s)
595 hpSize = argToInt(s);
596 if (hpSize < MINIMUMHEAP)
597 hpSize = MINIMUMHEAP;
598 else if (MAXIMUMHEAP && hpSize > MAXIMUMHEAP)
599 hpSize = MAXIMUMHEAP;
600 if (heapBuilt() && hpSize != heapSize) {
601 /* ToDo: should this use a message box in winhugs? */
603 FPrintf(stderr,"Change to heap size will not take effect until you rerun Hugs\n");
605 FPrintf(stderr,"Cannot change heap size\n");
613 static Int local argToInt(s) /* read integer from argument str */
618 if (*s=='\0' || !isascii((int)(*s)) || !isdigit((int)(*s))) {
619 ERRMSG(0) "Missing integer in option setting \"%s\"", t
624 Int d = (*s++) - '0';
625 if (n > ((MAXPOSINT - d)/10)) {
626 ERRMSG(0) "Option setting \"%s\" is too large", t
630 } while (isascii((int)(*s)) && isdigit((int)(*s)));
632 if (*s=='K' || *s=='k') {
633 if (n > (MAXPOSINT/1000)) {
634 ERRMSG(0) "Option setting \"%s\" is too large", t
641 #if MAXPOSINT > 1000000 /* waste of time on 16 bit systems */
642 if (*s=='M' || *s=='m') {
643 if (n > (MAXPOSINT/1000000)) {
644 ERRMSG(0) "Option setting \"%s\" is too large", t
652 #if MAXPOSINT > 1000000000
653 if (*s=='G' || *s=='g') {
654 if (n > (MAXPOSINT/1000000000)) {
655 ERRMSG(0) "Option setting \"%s\" is too large", t
664 ERRMSG(0) "Unwanted characters after option setting \"%s\"", t
671 /* --------------------------------------------------------------------------
672 * Print Menu of list of commands:
673 * ------------------------------------------------------------------------*/
675 static struct cmd cmds[] = {
676 {":?", HELP}, {":cd", CHGDIR}, {":also", ALSO},
677 {":type", TYPEOF}, {":!", SYSTEM}, {":load", LOAD},
678 {":reload", RELOAD}, {":gc", COLLECT}, {":edit", EDIT},
679 {":quit", QUIT}, {":set", SET}, {":find", FIND},
680 {":names", NAMES}, {":info", INFO}, {":project", PROJECT},
681 {":dump", DUMP}, {":ztats", STATS},
682 {":module",SETMODULE},
684 #if EXPLAIN_INSTANCE_RESOLUTION
687 {":version", PNTVER},
692 static Void local menu() {
693 Printf("LIST OF COMMANDS: Any command may be abbreviated to :c where\n");
694 Printf("c is the first character in the full name.\n\n");
695 Printf(":load <filenames> load modules from specified files\n");
696 Printf(":load clear all files except prelude\n");
697 Printf(":also <filenames> read additional modules\n");
698 Printf(":reload repeat last load command\n");
699 Printf(":project <filename> use project file\n");
700 Printf(":edit <filename> edit file\n");
701 Printf(":edit edit last module\n");
702 Printf(":module <module> set module for evaluating expressions\n");
703 Printf("<expr> evaluate expression\n");
704 Printf(":type <expr> print type of expression\n");
705 Printf(":? display this list of commands\n");
706 Printf(":set <options> set command line options\n");
707 Printf(":set help on command line options\n");
708 Printf(":names [pat] list names currently in scope\n");
709 Printf(":info <names> describe named objects\n");
710 Printf(":browse <modules> browse names defined in <modules>\n");
711 #if EXPLAIN_INSTANCE_RESOLUTION
712 Printf(":xplain <context> explain instance resolution for <context>\n");
714 Printf(":find <name> edit module containing definition of name\n");
715 Printf(":!command shell escape\n");
716 Printf(":cd dir change directory\n");
717 Printf(":gc force garbage collection\n");
718 Printf(":version print Hugs version\n");
719 Printf(":dump <name> print STG code for named fn\n");
720 #ifdef CRUDE_PROFILING
721 Printf(":ztats <name> print reduction stats\n");
723 Printf(":quit exit Hugs interpreter\n");
726 static Void local guidance() {
727 Printf("Command not recognised. ");
731 static Void local forHelp() {
732 Printf("Type :? for help\n");
735 /* --------------------------------------------------------------------------
736 * Setting of command line options:
737 * ------------------------------------------------------------------------*/
739 struct options toggle[] = { /* List of command line toggles */
740 {'s', 1, "Print no. reductions/cells after eval", &showStats},
741 {'t', 1, "Print type after evaluation", &addType},
742 {'g', 1, "Print no. cells recovered after gc", &gcMessages},
743 {'l', 1, "Literate modules as default", &literateScripts},
744 {'e', 1, "Warn about errors in literate modules", &literateErrors},
745 {'.', 1, "Print dots to show progress", &useDots},
746 {'q', 1, "Print nothing to show progress", &quiet},
747 {'w', 1, "Always show which modules are loaded", &listScripts},
748 {'k', 1, "Show kind errors in full", &kindExpert},
749 {'o', 0, "Allow overlapping instances", &allowOverlap},
750 {'O', 1, "Optimise (improve?) generated code", &optimise},
754 {'D', 1, "Debug: show generated code", &debugCode},
756 #if EXPLAIN_INSTANCE_RESOLUTION
757 {'x', 1, "Explain instance resolution", &showInstRes},
760 {'m', 0, "Use multi instance resolution", &multiInstRes},
763 {'D', 1, "Debug: show generated G code", &debugCode},
766 {'S', 1, "Debug: show generated SC code", &debugSC},
769 {'f', 1, "Terminate evaluation on first error", &failOnError},
770 {'u', 1, "Use \"show\" to display results", &useShow},
771 {'i', 1, "Chase imports while loading modules", &chaseImports},
776 static Void local set() { /* change command line options from*/
777 String s; /* Hugs command line */
779 if ((s=readFilename())!=0) {
781 if (!processOption(s)) {
782 ERRMSG(0) "Option string must begin with `+' or `-'"
785 } while ((s=readFilename())!=0);
787 writeRegString("Options", optionsToStr());
794 /* --------------------------------------------------------------------------
795 * Change directory command:
796 * ------------------------------------------------------------------------*/
798 static Void local changeDir() { /* change directory */
799 String s = readFilename();
801 ERRMSG(0) "Unable to change to directory \"%s\"", s
806 /* --------------------------------------------------------------------------
807 * Loading project and script files:
808 * ------------------------------------------------------------------------*/
810 static Void local loadProject(s) /* Load project file */
814 projInput(currProject);
815 scriptFile = currProject;
816 forgetScriptsFrom(1);
817 while ((s=readFilename())!=0)
820 ERRMSG(0) "Empty project file"
824 projectLoaded = TRUE;
827 static Void local clearProject() { /* clear name for current project */
831 projectLoaded = FALSE;
833 setLastEdit((String)0,0);
839 static Void local makeStackEntry ( ScriptInfo* ent, String iname )
842 Bool sAvail, iAvail, oAvail;
843 Time sTime, iTime, oTime;
844 Long sSize, iSize, oSize;
847 ok = findFilesForModule (
851 &sAvail, &sTime, &sSize,
852 &iAvail, &iTime, &iSize,
853 &oAvail, &oTime, &oSize
857 /* "Can't file source or object+interface for module \"%s\"", */
858 "Can't file source for module \"%s\"",
862 /* findFilesForModule should enforce this */
863 if (!(sAvail || (oAvail && iAvail)))
865 /* Load objects in preference to sources if both are available */
866 /* 11 Oct 99: disable object loading in the interim.
867 Will probably only reinstate when HEP becomes available.
869 ? (oAvail && iAvail && timeEarlier(sTime,oTime))
874 /* ToDo: namesUpto overflow */
875 ent->modName = strCopy(iname);
878 ent->fromSource = !fromObj;
880 ent->postponed = FALSE;
881 ent->lastChange = sTime; /* ToDo: is this right? */
882 ent->size = fromObj ? iSize : sSize;
883 ent->oSize = fromObj ? oSize : 0;
884 ent->objLoaded = FALSE;
889 static Void nukeEnding( String s )
892 if (l > 2 && strncmp(s+l-2,".o" ,3)==0) s[l-2] = 0; else
893 if (l > 3 && strncmp(s+l-3,".hi" ,3)==0) s[l-3] = 0; else
894 if (l > 3 && strncmp(s+l-3,".hs" ,3)==0) s[l-3] = 0; else
895 if (l > 4 && strncmp(s+l-4,".lhs",4)==0) s[l-4] = 0; else
896 if (l > 4 && strncmp(s+l-4,".dll",4)==0) s[l-4] = 0; else
897 if (l > 4 && strncmp(s+l-4,".DLL",4)==0) s[l-4] = 0;
900 static Void local addStackEntry(s) /* Add script to list of scripts */
901 String s; { /* to be read in ... */
906 if (namesUpto>=NUM_SCRIPTS) {
907 ERRMSG(0) "Too many module files (maximum of %d allowed)",
914 for (s2 = s; *s2; s2++)
915 if (*s2 == SLASH && *(s2+1)) s = s2+1;
918 for (i = 0; i < namesUpto; i++)
919 if (strcmp(scriptInfo[i].modName,s)==0)
923 makeStackEntry ( &scriptInfo[namesUpto], strCopy(s) );
929 /* Return TRUE if no imports were needed; FALSE otherwise. */
930 static Bool local addScript(stacknum) /* read single file */
932 static char name[FILENAME_MAX+1];
933 Int len = scriptInfo[stacknum].size;
935 #if HUGS_FOR_WINDOWS /* Set clock cursor while loading */
937 SetCursor(LoadCursor(NULL, IDC_WAIT));
940 // setLastEdit(name,0);
943 strcpy(name, scriptInfo[stacknum].path);
944 strcat(name, scriptInfo[stacknum].modName);
945 if (scriptInfo[stacknum].fromSource)
946 strcat(name, scriptInfo[stacknum].srcExt); else
951 if (scriptInfo[stacknum].fromSource) {
952 if (lastWasObject) finishInterfaces();
953 lastWasObject = FALSE;
954 Printf("Reading script \"%s\":\n",name);
955 needsImports = FALSE;
956 parseScript(name,len);
957 if (needsImports) return FALSE;
962 Printf("Reading iface \"%s\":\n", name);
964 needsImports = FALSE;
966 // set nameObj for the benefit of openGHCIface
967 strcpy(nameObj, scriptInfo[stacknum].path);
968 strcat(nameObj, scriptInfo[stacknum].modName);
969 strcat(nameObj, DLL_ENDING);
970 sizeObj = scriptInfo[stacknum].oSize;
972 loadInterface(name,len);
974 lastWasObject = TRUE;
975 if (needsImports) return FALSE;
979 preludeLoaded = TRUE;
984 Bool chase(imps) /* Process list of import requests */
988 Int origPos = numScripts; /* keep track of original position */
989 String origName = scriptInfo[origPos].modName;
990 for (; nonNull(imps); imps=tl(imps)) {
991 String iname = textToStr(textOf(hd(imps)));
993 for (; i<namesUpto; i++)
994 if (strcmp(scriptInfo[i].modName,iname)==0)
996 //fprintf(stderr, "import name = %s num = %d\n", iname, i );
999 /* We should have filled in the details of each module
1000 the first time we hear about it.
1002 assert(scriptInfo[i].details);
1005 if (i>=origPos) { /* Neither loaded or queued */
1011 needsImports = TRUE;
1012 if (scriptInfo[origPos].fromSource)
1013 scriptInfo[origPos].postponed = TRUE;
1015 if (i==namesUpto) { /* Name not found (i==namesUpto) */
1016 /* Find out where it lives, whether source or object, etc */
1017 makeStackEntry ( &scriptInfo[i], iname );
1021 if (scriptInfo[i].postponed && scriptInfo[i].fromSource) {
1022 /* Check for recursive dependency */
1024 "Recursive import dependency between \"%s\" and \"%s\"",
1025 scriptInfo[origPos].modName, iname
1028 /* Move stack entry i to somewhere below origPos. If i denotes
1029 * an object, destination is immediately below origPos.
1030 * Otherwise, it's underneath the queue of objects below origPos.
1032 dstPosn = origPos-1;
1033 if (scriptInfo[i].fromSource)
1034 while (!scriptInfo[dstPosn].fromSource && dstPosn > 0)
1038 tmp = scriptInfo[i];
1039 for (; i > dstPosn; i--) scriptInfo[i] = scriptInfo[i-1];
1040 scriptInfo[dstPosn] = tmp;
1041 if (dstPosn < nextNumScripts) nextNumScripts = dstPosn;
1045 return needsImports;
1048 static Void local forgetScriptsFrom(scno)/* remove scripts from system */
1052 for (i=scno; i<namesUpto; ++i)
1054 free(scriptName[i]);
1056 dropScriptsFrom(scno-1);
1058 if (numScripts>namesUpto)
1062 /* --------------------------------------------------------------------------
1063 * Commands for loading and removing script files:
1064 * ------------------------------------------------------------------------*/
1066 static Void local load() { /* read filenames from command line */
1067 String s; /* and add to list of scripts waiting */
1069 while ((s=readFilename())!=0)
1074 static Void local project() { /* read list of script names from */
1075 String s; /* project file */
1077 if ((s=readFilename()) || currProject) {
1079 s = strCopy(currProject);
1080 else if (readFilename()) {
1081 ERRMSG(0) "Too many project files"
1088 ERRMSG(0) "No project filename specified"
1095 static Void local readScripts(n) /* Reread current list of scripts, */
1096 Int n; { /* loading everything after and */
1097 Time timeStamp; /* including the first script which*/
1098 Long fileSize; /* has been either changed or added*/
1099 static char name[FILENAME_MAX+1];
1101 lastWasObject = FALSE;
1102 ppSmStack("readscripts-begin");
1103 #if HUGS_FOR_WINDOWS
1104 SetCursor(LoadCursor(NULL, IDC_WAIT));
1108 for (; n<numScripts; n++) { /* Scan previously loaded scripts */
1109 ppSmStack("readscripts-loop1");
1110 getFileInfo(scriptName[n], &timeStamp, &fileSize);
1111 if (timeChanged(timeStamp,lastChange[n])) {
1112 dropScriptsFrom(n-1);
1117 for (; n<NUM_SCRIPTS; n++) /* No scripts have been postponed */
1118 postponed[n] = FALSE; /* at this stage */
1121 while (numScripts<namesUpto) { /* Process any remaining scripts */
1122 ppSmStack("readscripts-loop2");
1123 getFileInfo(scriptName[numScripts], &timeStamp, &fileSize);
1124 timeSet(lastChange[numScripts],timeStamp);
1125 if (numScripts>0) /* no new script for prelude */
1126 startNewScript(scriptName[numScripts]);
1127 if (addScript(scriptName[numScripts],fileSize))
1130 dropScriptsFrom(numScripts-1);
1136 for (; n<numScripts; n++) {
1137 ppSmStack("readscripts-loop2");
1138 strcpy(name, scriptInfo[n].path);
1139 strcat(name, scriptInfo[n].modName);
1140 if (scriptInfo[n].fromSource)
1141 strcat(name, scriptInfo[n].srcExt); else
1142 strcat(name, ".hi"); //ToDo: should be .o
1143 getFileInfo(name,&timeStamp, &fileSize);
1144 if (timeChanged(timeStamp,scriptInfo[n].lastChange)) {
1145 dropScriptsFrom(n-1);
1150 for (; n<NUM_SCRIPTS; n++)
1151 scriptInfo[n].postponed = FALSE;
1155 while (numScripts < namesUpto) {
1156 ppSmStack ( "readscripts-loop2" );
1158 if (scriptInfo[numScripts].fromSource) {
1161 startNewScript(scriptInfo[numScripts].modName);
1162 nextNumScripts = NUM_SCRIPTS; //bogus initialisation
1163 if (addScript(numScripts)) {
1165 assert(nextNumScripts==NUM_SCRIPTS);
1168 dropScriptsFrom(numScripts-1);
1172 if (scriptInfo[numScripts].objLoaded) {
1175 scriptInfo[numScripts].objLoaded = TRUE;
1178 startNewScript(scriptInfo[numScripts].modName);
1180 nextNumScripts = NUM_SCRIPTS;
1181 if (addScript(numScripts)) {
1183 assert(nextNumScripts==NUM_SCRIPTS);
1185 //while (!scriptInfo[numScripts].fromSource && numScripts > 0)
1187 //if (scriptInfo[numScripts].fromSource)
1189 numScripts = nextNumScripts;
1190 assert(nextNumScripts<NUM_SCRIPTS);
1194 if (numScripts==namesUpto) ppSmStack( "readscripts-final") ;
1199 { Int m = namesUpto-1;
1200 Text mtext = findText(scriptInfo[m].modName);
1201 /* Commented out till we understand what
1202 * this is trying to do.
1203 * Problem, you cant find a module till later.
1206 setCurrModule(findModule(mtext));
1216 setLastEdit((String)0, 0);
1217 ppSmStack("readscripts-end ");
1220 static Void local whatScripts() { /* list scripts in current session */
1222 Printf("\nHugs session for:");
1224 Printf(" (project: %s)",currProject);
1225 for (i=0; i<numScripts; ++i)
1226 Printf("\n%s%s",scriptInfo[i].path, scriptInfo[i].modName);
1230 /* --------------------------------------------------------------------------
1231 * Access to external editor:
1232 * ------------------------------------------------------------------------*/
1234 static Void local editor() { /* interpreter-editor interface */
1235 String newFile = readFilename();
1237 setLastEdit(newFile,0);
1238 if (readFilename()) {
1239 ERRMSG(0) "Multiple filenames not permitted"
1246 static Void local find() { /* edit file containing definition */
1248 This just plain wont work no more.
1250 String nm = readFilename(); /* of specified name */
1252 ERRMSG(0) "No name specified"
1255 else if (readFilename()) {
1256 ERRMSG(0) "Multiple names not permitted"
1262 setCurrModule(findEvalModule());
1264 if (nonNull(c=findTycon(t=findText(nm)))) {
1265 if (startEdit(tycon(c).line,scriptName[scriptThisTycon(c)])) {
1268 } else if (nonNull(c=findName(t))) {
1269 if (startEdit(name(c).line,scriptName[scriptThisName(c)])) {
1273 ERRMSG(0) "No current definition for name \"%s\"", nm
1280 static Void local runEditor() { /* run editor on script lastEdit */
1281 if (startEdit(lastEdLine,lastEdit)) /* at line lastEdLine */
1285 static Void local setLastEdit(fname,line)/* keep name of last file to edit */
1290 lastEdit = strCopy(fname);
1292 #if HUGS_FOR_WINDOWS
1293 DrawStatusLine(hWndMain); /* Redo status line */
1297 /* --------------------------------------------------------------------------
1298 * Read and evaluate an expression:
1299 * ------------------------------------------------------------------------*/
1301 static Void local setModule(){/*set module in which to evaluate expressions*/
1302 String s = readFilename();
1303 if (!s) s = ""; /* :m clears the current module selection */
1304 evalModule = findText(s);
1305 setLastEdit(fileOfModule(findEvalModule()),0);
1308 static Module local findEvalModule() { /*Module in which to eval expressions*/
1309 Module m = findModule(evalModule);
1315 static Void local evaluator() { /* evaluate expr and print value */
1319 setCurrModule(findEvalModule());
1321 startNewScript(0); /* Enables recovery of storage */
1322 /* allocated during evaluation */
1325 defaultDefns = evalDefaults;
1326 type = typeCheckExp(TRUE);
1327 if (isPolyType(type)) {
1328 ks = polySigOf(type);
1329 bd = monotypeOf(type);
1334 if (whatIs(bd)==QUAL) {
1335 ERRMSG(0) "Unresolved overloading" ETHEN
1336 ERRTEXT "\n*** Type : " ETHEN ERRTYPE(type);
1337 ERRTEXT "\n*** Expression : " ETHEN ERREXPR(inputExpr);
1347 if (typeMatches(type,ap(typeIO,typeUnit))) {
1348 inputExpr = ap(nameRunIO,inputExpr);
1352 Cell d = provePred(ks,NIL,ap(classShow,bd));
1354 ERRMSG(0) "Cannot find \"show\" function for:" ETHEN
1355 ERRTEXT "\n*** expression : " ETHEN ERREXPR(inputExpr);
1356 ERRTEXT "\n*** of type : " ETHEN ERRTYPE(type);
1360 inputExpr = ap2(findName(findText("show")),d,inputExpr);
1361 inputExpr = ap(findName(findText("putStr")), inputExpr);
1362 inputExpr = ap(nameRunIO, inputExpr);
1364 evalExp(); printf("\n");
1367 printType(stdout,type);
1374 printf ( "result type is " );
1375 printType ( stdout, type );
1384 static Void local stopAnyPrinting() { /* terminate printing of expression,*/
1385 if (printing) { /* after successful termination or */
1386 printing = FALSE; /* runtime error (e.g. interrupt) */
1389 #define plural(v) v, (v==1?"":"s")
1390 Printf("%lu cell%s",plural(numCells));
1392 Printf(", %u garbage collection%s",plural(numGcs));
1401 /* --------------------------------------------------------------------------
1402 * Print type of input expression:
1403 * ------------------------------------------------------------------------*/
1405 static Void local showtype() { /* print type of expression (if any)*/
1408 setCurrModule(findEvalModule());
1409 startNewScript(0); /* Enables recovery of storage */
1410 /* allocated during evaluation */
1413 defaultDefns = evalDefaults;
1414 type = typeCheckExp(FALSE);
1415 printExp(stdout,inputExpr);
1417 printType(stdout,type);
1422 static Void local browseit(mod,t)
1427 Printf("module %s where\n",textToStr(module(mod).text));
1428 for (cs = module(mod).names; nonNull(cs); cs=tl(cs)) {
1430 /* only look at things defined in this module */
1431 if (name(nm).mod == mod) {
1432 /* unwanted artifacts, like lambda lifted values,
1433 are in the list of names, but have no types */
1434 if (nonNull(name(nm).type)) {
1435 printExp(stdout,nm);
1437 printType(stdout,name(nm).type);
1439 Printf(" -- data constructor");
1440 } else if (isMfun(nm)) {
1441 Printf(" -- class member");
1442 } else if (isSfun(nm)) {
1443 Printf(" -- selector function");
1451 Printf("Unknown module %s\n",t);
1456 static Void local browse() { /* browse modules */
1457 Int count = 0; /* or give menu of commands */
1460 setCurrModule(findEvalModule());
1461 startNewScript(0); /* for recovery of storage */
1462 for (; (s=readFilename())!=0; count++) {
1463 browseit(findModule(findText(s)),s);
1470 #if EXPLAIN_INSTANCE_RESOLUTION
1471 static Void local xplain() { /* print type of expression (if any)*/
1474 Bool sir = showInstRes;
1476 setCurrModule(findEvalModule());
1477 startNewScript(0); /* Enables recovery of storage */
1478 /* allocated during evaluation */
1482 d = provePred(NIL,NIL,hd(inputContext));
1484 fprintf(stdout, "not Sat\n");
1486 fprintf(stdout, "Sat\n");
1492 /* --------------------------------------------------------------------------
1493 * Enhanced help system: print current list of scripts or give information
1495 * ------------------------------------------------------------------------*/
1497 static String local objToStr(m,c)
1500 #if 1 || DISPLAY_QUANTIFIERS
1501 static char newVar[60];
1502 switch (whatIs(c)) {
1503 case NAME : if (m == name(c).mod) {
1504 sprintf(newVar,"%s", textToStr(name(c).text));
1506 sprintf(newVar,"%s.%s",
1507 textToStr(module(name(c).mod).text),
1508 textToStr(name(c).text));
1512 case TYCON : if (m == tycon(c).mod) {
1513 sprintf(newVar,"%s", textToStr(tycon(c).text));
1515 sprintf(newVar,"%s.%s",
1516 textToStr(module(tycon(c).mod).text),
1517 textToStr(tycon(c).text));
1521 case CLASS : if (m == cclass(c).mod) {
1522 sprintf(newVar,"%s", textToStr(cclass(c).text));
1524 sprintf(newVar,"%s.%s",
1525 textToStr(module(cclass(c).mod).text),
1526 textToStr(cclass(c).text));
1530 default : internal("objToStr");
1534 static char newVar[33];
1535 switch (whatIs(c)) {
1536 case NAME : sprintf(newVar,"%s", textToStr(name(c).text));
1539 case TYCON : sprintf(newVar,"%s", textToStr(tycon(c).text));
1542 case CLASS : sprintf(newVar,"%s", textToStr(cclass(c).text));
1545 default : internal("objToStr");
1553 static Void local dumpStg( void ) { /* print STG stuff */
1558 Cell v; /* really StgVar */
1559 setCurrModule(findEvalModule());
1561 for (; (s=readFilename())!=0;) {
1564 /* find the name while ignoring module scopes */
1565 for (i=NAMEMIN; i<nameHw; i++)
1566 if (name(i).text == t) n = i;
1568 /* perhaps it's an "idNNNNNN" thing? */
1571 s[0]=='i' && s[1]=='d' && isdigit(s[2])) {
1574 while (isdigit(s[i])) {
1575 v = v * 10 + (s[i]-'0');
1579 n = nameFromStgVar(v);
1582 if (isNull(n) && whatIs(v)==STGVAR) {
1583 Printf ( "\n{- `%s' has no nametable entry -}\n", s );
1584 Printf ( "{- stgSize of body is %d -}\n\n", stgSize(stgVarBody(v)));
1585 printStg(stderr, v );
1588 Printf ( "Unknown reference `%s'\n", s );
1591 Printf ( "Not a Name: `%s'\n", s );
1593 if (isNull(name(n).stgVar)) {
1594 Printf ( "Doesn't have a STG tree: %s\n", s );
1596 Printf ( "\n{- stgVar of `%s' is id%d -}\n", s, -name(n).stgVar);
1597 Printf ( "{- stgSize of body is %d -}\n\n",
1598 stgSize(stgVarBody(name(n).stgVar)));
1599 printStg(stderr, name(n).stgVar);
1604 static Void local info() { /* describe objects */
1605 Int count = 0; /* or give menu of commands */
1608 setCurrModule(findEvalModule());
1609 startNewScript(0); /* for recovery of storage */
1610 for (; (s=readFilename())!=0; count++) {
1611 describe(findText(s));
1619 static Void local describe(t) /* describe an object */
1621 Tycon tc = findTycon(t);
1622 Class cl = findClass(t);
1623 Name nm = findName(t);
1625 if (nonNull(tc)) { /* as a type constructor */
1629 for (i=0; i<tycon(tc).arity; ++i) {
1630 t = ap(t,mkOffset(i));
1632 Printf("-- type constructor");
1634 Printf(" with kind ");
1635 printKind(stdout,tycon(tc).kind);
1638 switch (tycon(tc).what) {
1639 case SYNONYM : Printf("type ");
1640 printType(stdout,t);
1642 printType(stdout,tycon(tc).defn);
1646 case DATATYPE : { List cs = tycon(tc).defn;
1647 if (tycon(tc).what==DATATYPE) {
1652 printType(stdout,t);
1654 mapProc(printSyntax,cs);
1656 Printf("\n-- constructors:");
1658 for (; hasCfun(cs); cs=tl(cs)) {
1660 printExp(stdout,hd(cs));
1662 printType(stdout,name(hd(cs)).type);
1665 Printf("\n-- selectors:");
1667 for (; nonNull(cs); cs=tl(cs)) {
1669 printExp(stdout,hd(cs));
1671 printType(stdout,name(hd(cs)).type);
1676 case RESTRICTSYN : Printf("type ");
1677 printType(stdout,t);
1678 Printf(" = <restricted>");
1682 if (nonNull(in=findFirstInst(tc))) {
1683 Printf("\n-- instances:\n");
1686 in = findNextInst(tc,in);
1687 } while (nonNull(in));
1692 if (nonNull(cl)) { /* as a class */
1693 List ins = cclass(cl).instances;
1694 Kinds ks = cclass(cl).kinds;
1695 if (nonNull(ks) && isNull(tl(ks)) && hd(ks)==STAR) {
1696 Printf("-- type class");
1698 Printf("-- constructor class");
1700 Printf(" with arity ");
1701 printKinds(stdout,ks);
1705 mapProc(printSyntax,cclass(cl).members);
1707 if (nonNull(cclass(cl).supers)) {
1708 printContext(stdout,cclass(cl).supers);
1711 printPred(stdout,cclass(cl).head);
1713 if (nonNull(cclass(cl).fds)) {
1714 List fds = cclass(cl).fds;
1716 for (; nonNull(fds); fds=tl(fds)) {
1718 printFD(stdout,hd(fds));
1723 if (nonNull(cclass(cl).members)) {
1724 List ms = cclass(cl).members;
1727 Type t = name(hd(ms)).type;
1728 if (isPolyType(t)) {
1732 printExp(stdout,hd(ms));
1734 if (isNull(tl(fst(snd(t))))) {
1737 t = ap(QUAL,pair(tl(fst(snd(t))),snd(snd(t))));
1739 printType(stdout,t);
1741 } while (nonNull(ms));
1745 Printf("\n-- instances:\n");
1749 } while (nonNull(ins));
1754 if (nonNull(nm)) { /* as a function/name */
1756 printExp(stdout,nm);
1758 if (nonNull(name(nm).type)) {
1759 printType(stdout,name(nm).type);
1761 Printf("<unknown type>");
1765 Printf(" -- data constructor");
1766 } else if (isMfun(nm)) {
1767 Printf(" -- class member");
1768 } else if (isSfun(nm)) {
1769 Printf(" -- selector function");
1775 if (isNull(tc) && isNull(cl) && isNull(nm)) {
1776 Printf("Unknown reference `%s'\n",textToStr(t));
1780 static Void local printSyntax(nm)
1782 Syntax sy = syntaxOf(nm);
1783 Text t = name(nm).text;
1784 String s = textToStr(t);
1785 if (sy != defaultSyntax(t)) {
1787 switch (assocOf(sy)) {
1788 case LEFT_ASS : Putchar('l'); break;
1789 case RIGHT_ASS : Putchar('r'); break;
1790 case NON_ASS : break;
1792 Printf(" %i ",precOf(sy));
1793 if (isascii((int)(*s)) && isalpha((int)(*s))) {
1802 static Void local showInst(in) /* Display instance decl header */
1804 Printf("instance ");
1805 if (nonNull(inst(in).specifics)) {
1806 printContext(stdout,inst(in).specifics);
1809 printPred(stdout,inst(in).head);
1813 /* --------------------------------------------------------------------------
1814 * List all names currently in scope:
1815 * ------------------------------------------------------------------------*/
1817 static Void local listNames() { /* list names matching optional pat*/
1818 String pat = readFilename();
1820 Int width = getTerminalWidth() - 1;
1823 Module mod = findEvalModule();
1825 if (pat) { /* First gather names to list */
1827 names = addNamesMatching(pat,names);
1828 } while ((pat=readFilename())!=0);
1830 names = addNamesMatching((String)0,names);
1832 if (isNull(names)) { /* Then print them out */
1833 ERRMSG(0) "No names selected"
1836 for (termPos=0; nonNull(names); names=tl(names)) {
1837 String s = objToStr(mod,hd(names));
1839 if (termPos+1+l>width) {
1842 } else if (termPos>0) {
1850 Printf("\n(%d names listed)\n", count);
1853 /* --------------------------------------------------------------------------
1854 * print a prompt and read a line of input:
1855 * ------------------------------------------------------------------------*/
1857 static Void local promptForInput(moduleName)
1858 String moduleName; {
1859 char promptBuffer[1000];
1861 /* This is portable but could overflow buffer */
1862 sprintf(promptBuffer,prompt,moduleName);
1864 /* Works on ANSI C - but pre-ANSI compilers return a pointer to
1865 * promptBuffer instead.
1867 if (sprintf(promptBuffer,prompt,moduleName) >= 1000) {
1868 /* Reset prompt to a safe default to avoid an infinite loop */
1870 prompt = strCopy("? ");
1871 internal("Combined prompt and evaluation module name too long");
1875 stringInput("main\0"); else
1876 consoleInput(promptBuffer);
1879 /* --------------------------------------------------------------------------
1880 * main read-eval-print loop, with error trapping:
1881 * ------------------------------------------------------------------------*/
1883 static jmp_buf catch_error; /* jump buffer for error trapping */
1885 static Void local interpreter(argc,argv)/* main interpreter loop */
1888 Int errorNumber = setjmp(catch_error);
1890 if (errorNumber && autoMain) {
1891 fprintf(stderr, "hugs +Q: compilation failed -- can't run `main'\n" );
1895 breakOn(TRUE); /* enable break trapping */
1896 if (numScripts==0) { /* only succeeds on first time, */
1897 if (errorNumber) /* before prelude has been loaded */
1898 fatal("Unable to load prelude");
1899 initialize(argc,argv);
1905 everybody(RESET); /* reset to sensible initial state */
1906 dropScriptsFrom(numScripts-1); /* remove partially loaded scripts */
1907 /* not counting prelude as a script*/
1909 promptForInput(textToStr(module(findEvalModule()).text));
1911 cmd = readCommand(cmds, (Char)':', (Char)'!');
1916 case EDIT : editor();
1920 case LOAD : clearProject();
1921 forgetScriptsFrom(1);
1924 case ALSO : clearProject();
1925 forgetScriptsFrom(numScripts);
1928 case RELOAD : readScripts(1);
1930 case PROJECT: project();
1935 case EVAL : evaluator();
1937 case TYPEOF : showtype();
1939 case BROWSE : browse();
1941 #if EXPLAIN_INSTANCE_RESOLUTION
1942 case XPLAIN : xplain();
1945 case NAMES : listNames();
1949 case BADCMD : guidance();
1954 #ifdef CRUDE_PROFILING
1958 case SYSTEM : if (shellEsc(readLine()))
1959 Printf("Warning: Shell escape terminated abnormally\n");
1961 case CHGDIR : changeDir();
1965 case PNTVER: Printf("-- Hugs Version %s\n",
1968 case DUMP : dumpStg();
1971 case COLLECT: consGC = FALSE;
1974 Printf("Garbage collection recovered %d cells\n",
1981 Printf("Elapsed time (ms): %ld (user), %ld (system)\n",
1982 millisecs(userElapsed), millisecs(systElapsed));
1984 if (autoMain) break;
1989 /* --------------------------------------------------------------------------
1990 * Display progress towards goal:
1991 * ------------------------------------------------------------------------*/
1993 static Target currTarget;
1994 static Bool aiming = FALSE;
1997 static Int charCount;
1999 Void setGoal(what, t) /* Set goal for what to be t */
2003 currTarget = (t?t:1);
2006 currPos = strlen(what);
2007 maxPos = getTerminalWidth() - 1;
2011 for (charCount=0; *what; charCount++)
2016 Void soFar(t) /* Indicate progress towards goal */
2017 Target t; { /* has now reached t */
2020 Int newPos = (Int)((maxPos * ((long)t))/currTarget);
2025 if (newPos>currPos) {
2028 while (newPos>++currPos);
2035 Void done() { /* Goal has now been achieved */
2038 while (maxPos>currPos++)
2043 for (; charCount>0; charCount--) {
2052 static Void local failed() { /* Goal cannot be reached due to */
2053 if (aiming) { /* errors */
2060 /* --------------------------------------------------------------------------
2062 * ------------------------------------------------------------------------*/
2064 Void errHead(l) /* print start of error message */
2066 failed(); /* failed to reach target ... */
2068 FPrintf(errorStream,"ERROR");
2071 FPrintf(errorStream," \"%s\"", scriptFile);
2072 setLastEdit(scriptFile,l);
2073 if (l) FPrintf(errorStream," (line %d)",l);
2076 FPrintf(errorStream,": ");
2077 FFlush(errorStream);
2080 Void errFail() { /* terminate error message and */
2081 Putc('\n',errorStream); /* produce exception to return to */
2082 FFlush(errorStream); /* main command loop */
2083 longjmp(catch_error,1);
2086 Void errAbort() { /* altern. form of error handling */
2087 failed(); /* used when suitable error message*/
2088 stopAnyPrinting(); /* has already been printed */
2092 Void internal(msg) /* handle internal error */
2094 #if HUGS_FOR_WINDOWS
2096 wsprintf(buf,"INTERNAL ERROR: %s",msg);
2097 MessageBox(hWndMain, buf, appName, MB_ICONHAND | MB_OK);
2101 Printf("INTERNAL ERROR: %s\n",msg);
2103 longjmp(catch_error,1);
2106 Void fatal(msg) /* handle fatal error */
2108 #if HUGS_FOR_WINDOWS
2110 wsprintf(buf,"FATAL ERROR: %s",msg);
2111 MessageBox(hWndMain, buf, appName, MB_ICONHAND | MB_OK);
2114 Printf("\nFATAL ERROR: %s\n",msg);
2119 sigHandler(breakHandler) { /* respond to break interrupt */
2120 #if HUGS_FOR_WINDOWS
2121 MessageBox(GetFocus(), "Interrupted!", appName, MB_ICONSTOP | MB_OK);
2124 Printf("{Interrupted!}\n");
2126 breakOn(TRUE); /* reinstall signal handler - redundant on BSD systems */
2127 /* but essential on POSIX (and other?) systems */
2133 longjmp(catch_error,1);
2134 sigResume;/*NOTREACHED*/
2137 /* --------------------------------------------------------------------------
2138 * Read value from environment variable or registry:
2139 * ------------------------------------------------------------------------*/
2141 String fromEnv(var,def) /* return value of: */
2142 String var; /* environment variable named by var */
2143 String def; { /* or: default value given by def */
2144 String s = getenv(var);
2145 return (s ? s : def);
2148 /* --------------------------------------------------------------------------
2149 * String manipulation routines:
2150 * ------------------------------------------------------------------------*/
2152 static String local strCopy(s) /* make malloced copy of a string */
2156 if ((t=(char *)malloc(strlen(s)+1))==0) {
2157 ERRMSG(0) "String storage space exhausted"
2160 for (r=t; (*r++ = *s++)!=0; ) {
2167 /* --------------------------------------------------------------------------
2169 * We can redirect compiler output (prompts, error messages, etc) by
2170 * tweaking these functions.
2171 * ------------------------------------------------------------------------*/
2173 #if REDIRECT_OUTPUT && !HUGS_FOR_WINDOWS
2175 #ifdef HAVE_STDARG_H
2178 #include <varargs.h>
2181 /* ----------------------------------------------------------------------- */
2183 #define BufferSize 10000 /* size of redirected output buffer */
2185 typedef struct _HugsStream {
2186 char buffer[BufferSize]; /* buffer for redirected output */
2187 Int next; /* next space in buffer */
2190 static Void local vBufferedPrintf Args((HugsStream*, const char*, va_list));
2191 static Void local bufferedPutchar Args((HugsStream*, Char));
2192 static String local bufferClear Args((HugsStream *stream));
2194 static Void local vBufferedPrintf(stream, fmt, ap)
2198 Int spaceLeft = BufferSize - stream->next;
2199 char* p = &stream->buffer[stream->next];
2200 Int charsAdded = vsnprintf(p, spaceLeft, fmt, ap);
2201 if (0 <= charsAdded && charsAdded < spaceLeft)
2202 stream->next += charsAdded;
2203 #if 1 /* we can either buffer the first n chars or buffer the last n chars */
2209 static Void local bufferedPutchar(stream, c)
2212 if (BufferSize - stream->next >= 2) {
2213 stream->buffer[stream->next++] = c;
2214 stream->buffer[stream->next] = '\0';
2218 static String local bufferClear(stream)
2219 HugsStream *stream; {
2220 if (stream->next == 0) {
2224 return stream->buffer;
2228 /* ----------------------------------------------------------------------- */
2230 static HugsStream outputStreamH;
2232 * We rely on standard C semantics to initialise outputStreamH.next to 0.
2235 Void hugsEnableOutput(f)
2240 String hugsClearOutputBuffer() {
2241 return bufferClear(&outputStreamH);
2244 #ifdef HAVE_STDARG_H
2245 Void hugsPrintf(const char *fmt, ...) {
2246 va_list ap; /* pointer into argument list */
2247 va_start(ap, fmt); /* make ap point to first arg after fmt */
2248 if (!disableOutput) {
2251 vBufferedPrintf(&outputStreamH, fmt, ap);
2253 va_end(ap); /* clean up */
2256 Void hugsPrintf(fmt, va_alist)
2259 va_list ap; /* pointer into argument list */
2260 va_start(ap); /* make ap point to first arg after fmt */
2261 if (!disableOutput) {
2264 vBufferedPrintf(&outputStreamH, fmt, ap);
2266 va_end(ap); /* clean up */
2272 if (!disableOutput) {
2275 bufferedPutchar(&outputStreamH, c);
2279 Void hugsFlushStdout() {
2280 if (!disableOutput) {
2287 if (!disableOutput) {
2292 #ifdef HAVE_STDARG_H
2293 Void hugsFPrintf(FILE *fp, const char* fmt, ...) {
2296 if (!disableOutput) {
2297 vfprintf(fp, fmt, ap);
2299 vBufferedPrintf(&outputStreamH, fmt, ap);
2304 Void hugsFPrintf(FILE *fp, const char* fmt, va_list)
2310 if (!disableOutput) {
2311 vfprintf(fp, fmt, ap);
2313 vBufferedPrintf(&outputStreamH, fmt, ap);
2319 Void hugsPutc(c, fp)
2322 if (!disableOutput) {
2325 bufferedPutchar(&outputStreamH, c);
2329 #endif /* REDIRECT_OUTPUT && !HUGS_FOR_WINDOWS */
2330 /* --------------------------------------------------------------------------
2331 * Send message to each component of system:
2332 * ------------------------------------------------------------------------*/
2334 Void everybody(what) /* send command `what' to each component of*/
2335 Int what; { /* system to respond as appropriate ... */
2336 machdep(what); /* The order of calling each component is */
2337 storage(what); /* important for the INSTALL command */
2340 translateControl(what);
2342 staticAnalysis(what);
2343 deriveControl(what);
2350 /* --------------------------------------------------------------------------
2351 * Hugs for Windows code (WinMain and related functions)
2352 * ------------------------------------------------------------------------*/
2354 #if HUGS_FOR_WINDOWS
2355 #include "winhugs.c"