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: 1999/11/23 15:12:09 $
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,Bool));
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;
120 String modName; /* Module name */
121 Bool details; /* FALSE => remaining fields are invalid */
122 String path; /* Path to module */
123 String srcExt; /* ".hs" or ".lhs" if fromSource */
124 Time lastChange; /* Time of last change to script */
125 Bool fromSource; /* FALSE => load object code */
126 Bool postponed; /* Indicates postponed load */
133 static Void local makeStackEntry Args((ScriptInfo*,String));
134 static Void local addStackEntry Args((String));
136 static ScriptInfo scriptInfo[NUM_SCRIPTS];
138 static Int numScripts; /* Number of scripts loaded */
139 static Int nextNumScripts;
140 static Int namesUpto; /* Number of script names set */
141 static Bool needsImports; /* set to TRUE if imports required */
142 String scriptFile; /* Name of current script (if any) */
146 static Text evalModule = 0; /* Name of module we eval exprs in */
147 static String currProject = 0; /* Name of current project file */
148 static Bool projectLoaded = FALSE; /* TRUE => project file loaded */
150 static Bool autoMain = FALSE;
151 static String lastEdit = 0; /* Name of script to edit (if any) */
152 static Int lastEdLine = 0; /* Editor line number (if possible)*/
153 static String prompt = 0; /* Prompt string */
154 static Int hpSize = DEFAULTHEAP; /* Desired heap size */
155 String hugsEdit = 0; /* String for editor command */
156 String hugsPath = 0; /* String for file search path */
159 static Bool disableOutput = FALSE; /* redirect output to buffer? */
162 String bool2str ( Bool b )
164 if (b) return "Yes"; else return "No ";
167 void ppSmStack ( String who )
171 fflush(stdout);fflush(stderr);
173 printf ( "ppSmStack %s: numScripts = %d namesUpto = %d needsImports = %s\n",
174 who, numScripts, namesUpto, bool2str(needsImports) );
175 assert (namesUpto >= numScripts);
176 printf ( " Det FrS Pst ObL Module Ext Size ModTime Path\n" );
177 for (i = namesUpto-1; i >= 0; i--) {
178 printf ( "%c%2d: %3s %3s %3s %3s %16s %-4s %5ld %8lx %s\n",
179 (i==numScripts ? '*' : ' '),
180 i, bool2str(scriptInfo[i].details),
181 bool2str(scriptInfo[i].fromSource),
182 bool2str(scriptInfo[i].postponed),
183 bool2str(scriptInfo[i].objLoaded),
184 scriptInfo[i].modName,
185 scriptInfo[i].fromSource ? scriptInfo[i].srcExt : "",
187 scriptInfo[i].lastChange,
191 fflush(stdout);fflush(stderr);
197 /* --------------------------------------------------------------------------
199 * ------------------------------------------------------------------------*/
201 #ifndef NO_MAIN /* we omit main when building the "Hugs server" */
203 Main main Args((Int, String [])); /* now every func has a prototype */
208 #ifdef HAVE_CONSOLE_H /* Macintosh port */
210 _fcreator = 'R*ch'; /* // 'KAHL'; //'*TEX'; //'ttxt'; */
212 console_options.top = 50;
213 console_options.left = 20;
215 console_options.nrows = 32;
216 console_options.ncols = 80;
218 console_options.pause_atexit = 1;
219 console_options.title = "\pHugs";
221 console_options.procID = 5;
222 argc = ccommand(&argv);
225 CStackBase = &argc; /* Save stack base for use in gc */
227 /* Try and figure out an absolute path to the executable, so
228 we can make a reasonable guess about where the default
229 libraries (Prelude etc) are.
231 setDefaultLibDir ( argv[0] );
233 /* If first arg is +Q or -Q, be entirely silent, and automatically run
234 main after loading scripts. Useful for running the nofib suite. */
235 if (argc > 1 && (strcmp(argv[1],"+Q") == 0 || strcmp(argv[1],"-Q")==0)) {
237 if (strcmp(argv[1],"-Q") == 0) {
242 Printf("__ __ __ __ ____ ___ _________________________________________\n");
243 Printf("|| || || || || || ||__ STGHugs: 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);
327 if (!scriptName[0]) {
328 Printf("Prelude not found on current path: \"%s\"\n",
329 hugsPath ? hugsPath : "");
330 fatal("Unable to load prelude");
335 Printf("Haskell 98 mode: Restart with command line option -98 to enable extensions\n\n");
337 Printf("Hugs mode: Restart with command line option +98 for Haskell 98 mode\n\n");
341 evalModule = findText(""); /* evaluate wrt last module by default */
345 "\nUsing project file, ignoring additional filenames\n");
347 loadProject(strCopy(proj));
352 /* --------------------------------------------------------------------------
353 * Command line options:
354 * ------------------------------------------------------------------------*/
356 struct options { /* command line option toggles */
357 char c; /* table defined in main app. */
362 extern struct options toggle[];
364 static Void local toggleSet(c,state) /* Set command line toggle */
368 for (i=0; toggle[i].c; ++i)
369 if (toggle[i].c == c) {
370 *toggle[i].flag = state;
373 ERRMSG(0) "Unknown toggle `%c'", c
377 static Void local togglesIn(state) /* Print current list of toggles in*/
378 Bool state; { /* given state */
381 for (i=0; toggle[i].c; ++i)
382 if (*toggle[i].flag == state && (!haskell98 || toggle[i].h98)) {
384 Putchar((char)(state ? '+' : '-'));
385 Putchar(toggle[i].c);
392 static Void local optionInfo() { /* Print information about command */
393 static String fmts = "%-5s%s\n"; /* line settings */
394 static String fmtc = "%-5c%s\n";
397 Printf("TOGGLES: groups begin with +/- to turn options on/off resp.\n");
398 for (i=0; toggle[i].c; ++i) {
399 if (!haskell98 || toggle[i].h98) {
400 Printf(fmtc,toggle[i].c,toggle[i].description);
404 Printf("\nOTHER OPTIONS: (leading + or - makes no difference)\n");
405 Printf(fmts,"hnum","Set heap size (cannot be changed within Hugs)");
406 Printf(fmts,"pstr","Set prompt string to str");
407 Printf(fmts,"rstr","Set repeat last expression string to str");
408 Printf(fmts,"Pstr","Set search path for modules to str");
409 Printf(fmts,"Estr","Use editor setting given by str");
410 Printf(fmts,"cnum","Set constraint cutoff limit");
411 #if USE_PREPROCESSOR && (defined(HAVE_POPEN) || defined(HAVE__POPEN))
412 Printf(fmts,"Fstr","Set preprocessor filter to str");
415 Printf("\nCurrent settings: ");
418 Printf("-h%d",heapSize);
422 printString(repeatStr);
423 Printf(" -c%d",cutoff);
424 Printf("\nSearch path : -P");
425 printString(hugsPath);
428 if (projectPath!=NULL) {
429 Printf("\nProject Path : %s",projectPath);
432 Printf("\nEditor setting : -E");
433 printString(hugsEdit);
434 #if USE_PREPROCESSOR && (defined(HAVE_POPEN) || defined(HAVE__POPEN))
435 Printf("\nPreprocessor : -F");
436 printString(preprocessor);
438 Printf("\nCompatibility : %s", haskell98 ? "Haskell 98 (+98)"
439 : "Hugs Extensions (-98)");
443 #if USE_REGISTRY || HUGS_FOR_WINDOWS
451 #define PUTInt(optc,i) \
452 sprintf(next,"-%c%d",optc,i); \
455 #define PUTStr(c,s) \
456 next=PUTStr_aux(next,c,s)
458 static String local PUTStr_aux Args((String,Char, String));
460 static String local PUTStr_aux(next,c,s)
466 sprintf(next,"-%c\"",c);
469 PUTS(unlexChar(*t,'"'));
477 static String local optionsToStr() { /* convert options to string */
478 static char buffer[2000];
479 String next = buffer;
482 for (i=0; toggle[i].c; ++i) {
483 PUTC(*toggle[i].flag ? '+' : '-');
487 PUTS(haskell98 ? "+98 " : "-98 ");
488 PUTInt('h',hpSize); PUTC(' ');
490 PUTStr('r',repeatStr);
491 PUTStr('P',hugsPath);
492 PUTStr('E',hugsEdit);
493 PUTInt('c',cutoff); PUTC(' ');
494 #if USE_PREPROCESSOR && (defined(HAVE_POPEN) || defined(HAVE__POPEN))
495 PUTStr('F',preprocessor);
500 #endif /* USE_REGISTRY */
507 static Void local readOptions(options) /* read options from string */
511 stringInput(options);
512 while ((s=readFilename())!=0) {
513 if (*s && !processOption(s)) {
514 ERRMSG(0) "Option string must begin with `+' or `-'"
521 static Bool local processOption(s) /* process string s for options, */
522 String s; { /* return FALSE if none found. */
534 case 'Q' : break; /* already handled */
536 case 'p' : if (s[1]) {
537 if (prompt) free(prompt);
538 prompt = strCopy(s+1);
542 case 'r' : if (s[1]) {
543 if (repeatStr) free(repeatStr);
544 repeatStr = strCopy(s+1);
549 String p = substPath(s+1,hugsPath ? hugsPath : "");
550 if (hugsPath) free(hugsPath);
555 case 'E' : if (hugsEdit) free(hugsEdit);
556 hugsEdit = strCopy(s+1);
559 #if USE_PREPROCESSOR && (defined(HAVE_POPEN) || defined(HAVE__POPEN))
560 case 'F' : if (preprocessor) free(preprocessor);
561 preprocessor = strCopy(s+1);
565 case 'h' : setHeapSize(s+1);
568 case 'D' : /* hack */
570 extern void setRtsFlags( int x );
571 setRtsFlags(argToInt(s+1));
575 default : if (strcmp("98",s)==0) {
576 if (heapBuilt() && ((state && !haskell98) ||
577 (!state && haskell98))) {
579 "Haskell 98 compatibility cannot be changed"
580 " while the interpreter is running\n");
593 static Void local setHeapSize(s)
596 hpSize = argToInt(s);
597 if (hpSize < MINIMUMHEAP)
598 hpSize = MINIMUMHEAP;
599 else if (MAXIMUMHEAP && hpSize > MAXIMUMHEAP)
600 hpSize = MAXIMUMHEAP;
601 if (heapBuilt() && hpSize != heapSize) {
602 /* ToDo: should this use a message box in winhugs? */
604 FPrintf(stderr,"Change to heap size will not take effect until you rerun Hugs\n");
606 FPrintf(stderr,"Cannot change heap size\n");
614 static Int local argToInt(s) /* read integer from argument str */
619 if (*s=='\0' || !isascii((int)(*s)) || !isdigit((int)(*s))) {
620 ERRMSG(0) "Missing integer in option setting \"%s\"", t
625 Int d = (*s++) - '0';
626 if (n > ((MAXPOSINT - d)/10)) {
627 ERRMSG(0) "Option setting \"%s\" is too large", t
631 } while (isascii((int)(*s)) && isdigit((int)(*s)));
633 if (*s=='K' || *s=='k') {
634 if (n > (MAXPOSINT/1000)) {
635 ERRMSG(0) "Option setting \"%s\" is too large", t
642 #if MAXPOSINT > 1000000 /* waste of time on 16 bit systems */
643 if (*s=='M' || *s=='m') {
644 if (n > (MAXPOSINT/1000000)) {
645 ERRMSG(0) "Option setting \"%s\" is too large", t
653 #if MAXPOSINT > 1000000000
654 if (*s=='G' || *s=='g') {
655 if (n > (MAXPOSINT/1000000000)) {
656 ERRMSG(0) "Option setting \"%s\" is too large", t
665 ERRMSG(0) "Unwanted characters after option setting \"%s\"", t
672 /* --------------------------------------------------------------------------
673 * Print Menu of list of commands:
674 * ------------------------------------------------------------------------*/
676 static struct cmd cmds[] = {
677 {":?", HELP}, {":cd", CHGDIR}, {":also", ALSO},
678 {":type", TYPEOF}, {":!", SYSTEM}, {":load", LOAD},
679 {":reload", RELOAD}, {":gc", COLLECT}, {":edit", EDIT},
680 {":quit", QUIT}, {":set", SET}, {":find", FIND},
681 {":names", NAMES}, {":info", INFO}, {":project", PROJECT},
682 {":dump", DUMP}, {":ztats", STATS},
683 {":module",SETMODULE},
685 #if EXPLAIN_INSTANCE_RESOLUTION
688 {":version", PNTVER},
693 static Void local menu() {
694 Printf("LIST OF COMMANDS: Any command may be abbreviated to :c where\n");
695 Printf("c is the first character in the full name.\n\n");
696 Printf(":load <filenames> load modules from specified files\n");
697 Printf(":load clear all files except prelude\n");
698 Printf(":also <filenames> read additional modules\n");
699 Printf(":reload repeat last load command\n");
700 Printf(":project <filename> use project file\n");
701 Printf(":edit <filename> edit file\n");
702 Printf(":edit edit last module\n");
703 Printf(":module <module> set module for evaluating expressions\n");
704 Printf("<expr> evaluate expression\n");
705 Printf(":type <expr> print type of expression\n");
706 Printf(":? display this list of commands\n");
707 Printf(":set <options> set command line options\n");
708 Printf(":set help on command line options\n");
709 Printf(":names [pat] list names currently in scope\n");
710 Printf(":info <names> describe named objects\n");
711 Printf(":browse <modules> browse names defined in <modules>\n");
712 #if EXPLAIN_INSTANCE_RESOLUTION
713 Printf(":xplain <context> explain instance resolution for <context>\n");
715 Printf(":find <name> edit module containing definition of name\n");
716 Printf(":!command shell escape\n");
717 Printf(":cd dir change directory\n");
718 Printf(":gc force garbage collection\n");
719 Printf(":version print Hugs version\n");
720 Printf(":dump <name> print STG code for named fn\n");
721 #ifdef CRUDE_PROFILING
722 Printf(":ztats <name> print reduction stats\n");
724 Printf(":quit exit Hugs interpreter\n");
727 static Void local guidance() {
728 Printf("Command not recognised. ");
732 static Void local forHelp() {
733 Printf("Type :? for help\n");
736 /* --------------------------------------------------------------------------
737 * Setting of command line options:
738 * ------------------------------------------------------------------------*/
740 struct options toggle[] = { /* List of command line toggles */
741 {'s', 1, "Print no. reductions/cells after eval", &showStats},
742 {'t', 1, "Print type after evaluation", &addType},
743 {'g', 1, "Print no. cells recovered after gc", &gcMessages},
744 {'l', 1, "Literate modules as default", &literateScripts},
745 {'e', 1, "Warn about errors in literate modules", &literateErrors},
746 {'.', 1, "Print dots to show progress", &useDots},
747 {'q', 1, "Print nothing to show progress", &quiet},
748 {'w', 1, "Always show which modules are loaded", &listScripts},
749 {'k', 1, "Show kind errors in full", &kindExpert},
750 {'o', 0, "Allow overlapping instances", &allowOverlap},
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 (isProgType(ks,bd)) {
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,all)
1429 Printf("module %s where\n",textToStr(module(mod).text));
1430 for (cs = module(mod).names; nonNull(cs); cs=tl(cs)) {
1432 /* only look at things defined in this module,
1433 unless `all' flag is set */
1434 if (all || name(nm).mod == mod) {
1435 /* unwanted artifacts, like lambda lifted values,
1436 are in the list of names, but have no types */
1437 if (nonNull(name(nm).type)) {
1438 printExp(stdout,nm);
1440 printType(stdout,name(nm).type);
1442 Printf(" -- data constructor");
1443 } else if (isMfun(nm)) {
1444 Printf(" -- class member");
1445 } else if (isSfun(nm)) {
1446 Printf(" -- selector function");
1454 Printf("Unknown module %s\n",t);
1459 static Void local browse() { /* browse modules */
1460 Int count = 0; /* or give menu of commands */
1464 setCurrModule(findEvalModule());
1465 startNewScript(0); /* for recovery of storage */
1466 for (; (s=readFilename())!=0; count++)
1467 if (strcmp(s,"all") == 0) {
1471 browseit(findModule(findText(s)),s,all);
1473 browseit(findEvalModule(),NULL,all);
1477 #if EXPLAIN_INSTANCE_RESOLUTION
1478 static Void local xplain() { /* print type of expression (if any)*/
1480 Bool sir = showInstRes;
1482 setCurrModule(findEvalModule());
1483 startNewScript(0); /* Enables recovery of storage */
1484 /* allocated during evaluation */
1488 d = provePred(NIL,NIL,hd(inputContext));
1490 fprintf(stdout, "not Sat\n");
1492 fprintf(stdout, "Sat\n");
1498 /* --------------------------------------------------------------------------
1499 * Enhanced help system: print current list of scripts or give information
1501 * ------------------------------------------------------------------------*/
1503 static String local objToStr(m,c)
1506 #if 1 || DISPLAY_QUANTIFIERS
1507 static char newVar[60];
1508 switch (whatIs(c)) {
1509 case NAME : if (m == name(c).mod) {
1510 sprintf(newVar,"%s", textToStr(name(c).text));
1512 sprintf(newVar,"%s.%s",
1513 textToStr(module(name(c).mod).text),
1514 textToStr(name(c).text));
1518 case TYCON : if (m == tycon(c).mod) {
1519 sprintf(newVar,"%s", textToStr(tycon(c).text));
1521 sprintf(newVar,"%s.%s",
1522 textToStr(module(tycon(c).mod).text),
1523 textToStr(tycon(c).text));
1527 case CLASS : if (m == cclass(c).mod) {
1528 sprintf(newVar,"%s", textToStr(cclass(c).text));
1530 sprintf(newVar,"%s.%s",
1531 textToStr(module(cclass(c).mod).text),
1532 textToStr(cclass(c).text));
1536 default : internal("objToStr");
1540 static char newVar[33];
1541 switch (whatIs(c)) {
1542 case NAME : sprintf(newVar,"%s", textToStr(name(c).text));
1545 case TYCON : sprintf(newVar,"%s", textToStr(tycon(c).text));
1548 case CLASS : sprintf(newVar,"%s", textToStr(cclass(c).text));
1551 default : internal("objToStr");
1559 static Void local dumpStg( void ) { /* print STG stuff */
1564 Cell v; /* really StgVar */
1565 setCurrModule(findEvalModule());
1567 for (; (s=readFilename())!=0;) {
1570 /* find the name while ignoring module scopes */
1571 for (i=NAMEMIN; i<nameHw; i++)
1572 if (name(i).text == t) n = i;
1574 /* perhaps it's an "idNNNNNN" thing? */
1577 s[0]=='i' && s[1]=='d' && isdigit(s[2])) {
1580 while (isdigit(s[i])) {
1581 v = v * 10 + (s[i]-'0');
1585 n = nameFromStgVar(v);
1588 if (isNull(n) && whatIs(v)==STGVAR) {
1589 Printf ( "\n{- `%s' has no nametable entry -}\n", s );
1590 printStg(stderr, v );
1593 Printf ( "Unknown reference `%s'\n", s );
1596 Printf ( "Not a Name: `%s'\n", s );
1598 if (isNull(name(n).stgVar)) {
1599 Printf ( "Doesn't have a STG tree: %s\n", s );
1601 Printf ( "\n{- stgVar of `%s' is id%d -}\n", s, -name(n).stgVar);
1602 printStg(stderr, name(n).stgVar);
1607 static Void local info() { /* describe objects */
1608 Int count = 0; /* or give menu of commands */
1611 setCurrModule(findEvalModule());
1612 startNewScript(0); /* for recovery of storage */
1613 for (; (s=readFilename())!=0; count++) {
1614 describe(findText(s));
1622 static Void local describe(t) /* describe an object */
1624 Tycon tc = findTycon(t);
1625 Class cl = findClass(t);
1626 Name nm = findName(t);
1628 if (nonNull(tc)) { /* as a type constructor */
1632 for (i=0; i<tycon(tc).arity; ++i) {
1633 t = ap(t,mkOffset(i));
1635 Printf("-- type constructor");
1637 Printf(" with kind ");
1638 printKind(stdout,tycon(tc).kind);
1641 switch (tycon(tc).what) {
1642 case SYNONYM : Printf("type ");
1643 printType(stdout,t);
1645 printType(stdout,tycon(tc).defn);
1649 case DATATYPE : { List cs = tycon(tc).defn;
1650 if (tycon(tc).what==DATATYPE) {
1655 printType(stdout,t);
1657 mapProc(printSyntax,cs);
1659 Printf("\n-- constructors:");
1661 for (; hasCfun(cs); cs=tl(cs)) {
1663 printExp(stdout,hd(cs));
1665 printType(stdout,name(hd(cs)).type);
1668 Printf("\n-- selectors:");
1670 for (; nonNull(cs); cs=tl(cs)) {
1672 printExp(stdout,hd(cs));
1674 printType(stdout,name(hd(cs)).type);
1679 case RESTRICTSYN : Printf("type ");
1680 printType(stdout,t);
1681 Printf(" = <restricted>");
1685 if (nonNull(in=findFirstInst(tc))) {
1686 Printf("\n-- instances:\n");
1689 in = findNextInst(tc,in);
1690 } while (nonNull(in));
1695 if (nonNull(cl)) { /* as a class */
1696 List ins = cclass(cl).instances;
1697 Kinds ks = cclass(cl).kinds;
1698 if (nonNull(ks) && isNull(tl(ks)) && hd(ks)==STAR) {
1699 Printf("-- type class");
1701 Printf("-- constructor class");
1703 Printf(" with arity ");
1704 printKinds(stdout,ks);
1708 mapProc(printSyntax,cclass(cl).members);
1710 if (nonNull(cclass(cl).supers)) {
1711 printContext(stdout,cclass(cl).supers);
1714 printPred(stdout,cclass(cl).head);
1716 if (nonNull(cclass(cl).fds)) {
1717 List fds = cclass(cl).fds;
1719 for (; nonNull(fds); fds=tl(fds)) {
1721 printFD(stdout,hd(fds));
1726 if (nonNull(cclass(cl).members)) {
1727 List ms = cclass(cl).members;
1730 Type t = name(hd(ms)).type;
1731 if (isPolyType(t)) {
1735 printExp(stdout,hd(ms));
1737 if (isNull(tl(fst(snd(t))))) {
1740 t = ap(QUAL,pair(tl(fst(snd(t))),snd(snd(t))));
1742 printType(stdout,t);
1744 } while (nonNull(ms));
1748 Printf("\n-- instances:\n");
1752 } while (nonNull(ins));
1757 if (nonNull(nm)) { /* as a function/name */
1759 printExp(stdout,nm);
1761 if (nonNull(name(nm).type)) {
1762 printType(stdout,name(nm).type);
1764 Printf("<unknown type>");
1768 Printf(" -- data constructor");
1769 } else if (isMfun(nm)) {
1770 Printf(" -- class member");
1771 } else if (isSfun(nm)) {
1772 Printf(" -- selector function");
1778 if (isNull(tc) && isNull(cl) && isNull(nm)) {
1779 Printf("Unknown reference `%s'\n",textToStr(t));
1783 static Void local printSyntax(nm)
1785 Syntax sy = syntaxOf(nm);
1786 Text t = name(nm).text;
1787 String s = textToStr(t);
1788 if (sy != defaultSyntax(t)) {
1790 switch (assocOf(sy)) {
1791 case LEFT_ASS : Putchar('l'); break;
1792 case RIGHT_ASS : Putchar('r'); break;
1793 case NON_ASS : break;
1795 Printf(" %i ",precOf(sy));
1796 if (isascii((int)(*s)) && isalpha((int)(*s))) {
1805 static Void local showInst(in) /* Display instance decl header */
1807 Printf("instance ");
1808 if (nonNull(inst(in).specifics)) {
1809 printContext(stdout,inst(in).specifics);
1812 printPred(stdout,inst(in).head);
1816 /* --------------------------------------------------------------------------
1817 * List all names currently in scope:
1818 * ------------------------------------------------------------------------*/
1820 static Void local listNames() { /* list names matching optional pat*/
1821 String pat = readFilename();
1823 Int width = getTerminalWidth() - 1;
1826 Module mod = findEvalModule();
1828 if (pat) { /* First gather names to list */
1830 names = addNamesMatching(pat,names);
1831 } while ((pat=readFilename())!=0);
1833 names = addNamesMatching((String)0,names);
1835 if (isNull(names)) { /* Then print them out */
1836 ERRMSG(0) "No names selected"
1839 for (termPos=0; nonNull(names); names=tl(names)) {
1840 String s = objToStr(mod,hd(names));
1842 if (termPos+1+l>width) {
1845 } else if (termPos>0) {
1853 Printf("\n(%d names listed)\n", count);
1856 /* --------------------------------------------------------------------------
1857 * print a prompt and read a line of input:
1858 * ------------------------------------------------------------------------*/
1860 static Void local promptForInput(moduleName)
1861 String moduleName; {
1862 char promptBuffer[1000];
1864 /* This is portable but could overflow buffer */
1865 sprintf(promptBuffer,prompt,moduleName);
1867 /* Works on ANSI C - but pre-ANSI compilers return a pointer to
1868 * promptBuffer instead.
1870 if (sprintf(promptBuffer,prompt,moduleName) >= 1000) {
1871 /* Reset prompt to a safe default to avoid an infinite loop */
1873 prompt = strCopy("? ");
1874 internal("Combined prompt and evaluation module name too long");
1878 stringInput("main\0"); else
1879 consoleInput(promptBuffer);
1882 /* --------------------------------------------------------------------------
1883 * main read-eval-print loop, with error trapping:
1884 * ------------------------------------------------------------------------*/
1886 static jmp_buf catch_error; /* jump buffer for error trapping */
1888 static Void local interpreter(argc,argv)/* main interpreter loop */
1891 Int errorNumber = setjmp(catch_error);
1893 if (errorNumber && autoMain) {
1894 fprintf(stderr, "hugs +Q: compilation failed -- can't run `main'\n" );
1898 breakOn(TRUE); /* enable break trapping */
1899 if (numScripts==0) { /* only succeeds on first time, */
1900 if (errorNumber) /* before prelude has been loaded */
1901 fatal("Unable to load prelude");
1902 initialize(argc,argv);
1906 /* initialize calls startupHaskell, which trashes our signal handlers */
1911 everybody(RESET); /* reset to sensible initial state */
1912 dropScriptsFrom(numScripts-1); /* remove partially loaded scripts */
1913 /* not counting prelude as a script*/
1915 promptForInput(textToStr(module(findEvalModule()).text));
1917 cmd = readCommand(cmds, (Char)':', (Char)'!');
1922 case EDIT : editor();
1926 case LOAD : clearProject();
1927 forgetScriptsFrom(1);
1930 case ALSO : clearProject();
1931 forgetScriptsFrom(numScripts);
1934 case RELOAD : readScripts(1);
1936 case PROJECT: project();
1941 case EVAL : evaluator();
1943 case TYPEOF : showtype();
1945 case BROWSE : browse();
1947 #if EXPLAIN_INSTANCE_RESOLUTION
1948 case XPLAIN : xplain();
1951 case NAMES : listNames();
1955 case BADCMD : guidance();
1960 #ifdef CRUDE_PROFILING
1964 case SYSTEM : if (shellEsc(readLine()))
1965 Printf("Warning: Shell escape terminated abnormally\n");
1967 case CHGDIR : changeDir();
1971 case PNTVER: Printf("-- Hugs Version %s\n",
1974 case DUMP : dumpStg();
1977 case COLLECT: consGC = FALSE;
1980 Printf("Garbage collection recovered %d cells\n",
1987 Printf("Elapsed time (ms): %ld (user), %ld (system)\n",
1988 millisecs(userElapsed), millisecs(systElapsed));
1990 if (autoMain) break;
1995 /* --------------------------------------------------------------------------
1996 * Display progress towards goal:
1997 * ------------------------------------------------------------------------*/
1999 static Target currTarget;
2000 static Bool aiming = FALSE;
2003 static Int charCount;
2005 Void setGoal(what, t) /* Set goal for what to be t */
2010 #if EXPLAIN_INSTANCE_RESOLUTION
2014 currTarget = (t?t:1);
2017 currPos = strlen(what);
2018 maxPos = getTerminalWidth() - 1;
2022 for (charCount=0; *what; charCount++)
2027 Void soFar(t) /* Indicate progress towards goal */
2028 Target t; { /* has now reached t */
2031 #if EXPLAIN_INSTANCE_RESOLUTION
2036 Int newPos = (Int)((maxPos * ((long)t))/currTarget);
2041 if (newPos>currPos) {
2044 while (newPos>++currPos);
2051 Void done() { /* Goal has now been achieved */
2054 #if EXPLAIN_INSTANCE_RESOLUTION
2059 while (maxPos>currPos++)
2064 for (; charCount>0; charCount--) {
2073 static Void local failed() { /* Goal cannot be reached due to */
2074 if (aiming) { /* errors */
2081 /* --------------------------------------------------------------------------
2083 * ------------------------------------------------------------------------*/
2085 Void errHead(l) /* print start of error message */
2087 failed(); /* failed to reach target ... */
2089 FPrintf(errorStream,"ERROR");
2092 FPrintf(errorStream," \"%s\"", scriptFile);
2093 setLastEdit(scriptFile,l);
2094 if (l) FPrintf(errorStream," (line %d)",l);
2097 FPrintf(errorStream,": ");
2098 FFlush(errorStream);
2101 Void errFail() { /* terminate error message and */
2102 Putc('\n',errorStream); /* produce exception to return to */
2103 FFlush(errorStream); /* main command loop */
2104 longjmp(catch_error,1);
2107 Void errAbort() { /* altern. form of error handling */
2108 failed(); /* used when suitable error message*/
2109 stopAnyPrinting(); /* has already been printed */
2113 Void internal(msg) /* handle internal error */
2115 #if HUGS_FOR_WINDOWS
2117 wsprintf(buf,"INTERNAL ERROR: %s",msg);
2118 MessageBox(hWndMain, buf, appName, MB_ICONHAND | MB_OK);
2122 Printf("INTERNAL ERROR: %s\n",msg);
2124 longjmp(catch_error,1);
2127 Void fatal(msg) /* handle fatal error */
2129 #if HUGS_FOR_WINDOWS
2131 wsprintf(buf,"FATAL ERROR: %s",msg);
2132 MessageBox(hWndMain, buf, appName, MB_ICONHAND | MB_OK);
2135 Printf("\nFATAL ERROR: %s\n",msg);
2140 sigHandler(breakHandler) { /* respond to break interrupt */
2141 #if HUGS_FOR_WINDOWS
2142 MessageBox(GetFocus(), "Interrupted!", appName, MB_ICONSTOP | MB_OK);
2145 Printf("{Interrupted!}\n");
2147 breakOn(TRUE); /* reinstall signal handler - redundant on BSD systems */
2148 /* but essential on POSIX (and other?) systems */
2154 longjmp(catch_error,1);
2155 sigResume;/*NOTREACHED*/
2158 /* --------------------------------------------------------------------------
2159 * Read value from environment variable or registry:
2160 * ------------------------------------------------------------------------*/
2162 String fromEnv(var,def) /* return value of: */
2163 String var; /* environment variable named by var */
2164 String def; { /* or: default value given by def */
2165 String s = getenv(var);
2166 return (s ? s : def);
2169 /* --------------------------------------------------------------------------
2170 * String manipulation routines:
2171 * ------------------------------------------------------------------------*/
2173 static String local strCopy(s) /* make malloced copy of a string */
2177 if ((t=(char *)malloc(strlen(s)+1))==0) {
2178 ERRMSG(0) "String storage space exhausted"
2181 for (r=t; (*r++ = *s++)!=0; ) {
2188 /* --------------------------------------------------------------------------
2190 * We can redirect compiler output (prompts, error messages, etc) by
2191 * tweaking these functions.
2192 * ------------------------------------------------------------------------*/
2194 #if REDIRECT_OUTPUT && !HUGS_FOR_WINDOWS
2196 #ifdef HAVE_STDARG_H
2199 #include <varargs.h>
2202 /* ----------------------------------------------------------------------- */
2204 #define BufferSize 10000 /* size of redirected output buffer */
2206 typedef struct _HugsStream {
2207 char buffer[BufferSize]; /* buffer for redirected output */
2208 Int next; /* next space in buffer */
2211 static Void local vBufferedPrintf Args((HugsStream*, const char*, va_list));
2212 static Void local bufferedPutchar Args((HugsStream*, Char));
2213 static String local bufferClear Args((HugsStream *stream));
2215 static Void local vBufferedPrintf(stream, fmt, ap)
2219 Int spaceLeft = BufferSize - stream->next;
2220 char* p = &stream->buffer[stream->next];
2221 Int charsAdded = vsnprintf(p, spaceLeft, fmt, ap);
2222 if (0 <= charsAdded && charsAdded < spaceLeft)
2223 stream->next += charsAdded;
2224 #if 1 /* we can either buffer the first n chars or buffer the last n chars */
2230 static Void local bufferedPutchar(stream, c)
2233 if (BufferSize - stream->next >= 2) {
2234 stream->buffer[stream->next++] = c;
2235 stream->buffer[stream->next] = '\0';
2239 static String local bufferClear(stream)
2240 HugsStream *stream; {
2241 if (stream->next == 0) {
2245 return stream->buffer;
2249 /* ----------------------------------------------------------------------- */
2251 static HugsStream outputStreamH;
2253 * We rely on standard C semantics to initialise outputStreamH.next to 0.
2256 Void hugsEnableOutput(f)
2261 String hugsClearOutputBuffer() {
2262 return bufferClear(&outputStreamH);
2265 #ifdef HAVE_STDARG_H
2266 Void hugsPrintf(const char *fmt, ...) {
2267 va_list ap; /* pointer into argument list */
2268 va_start(ap, fmt); /* make ap point to first arg after fmt */
2269 if (!disableOutput) {
2272 vBufferedPrintf(&outputStreamH, fmt, ap);
2274 va_end(ap); /* clean up */
2277 Void hugsPrintf(fmt, va_alist)
2280 va_list ap; /* pointer into argument list */
2281 va_start(ap); /* make ap point to first arg after fmt */
2282 if (!disableOutput) {
2285 vBufferedPrintf(&outputStreamH, fmt, ap);
2287 va_end(ap); /* clean up */
2293 if (!disableOutput) {
2296 bufferedPutchar(&outputStreamH, c);
2300 Void hugsFlushStdout() {
2301 if (!disableOutput) {
2308 if (!disableOutput) {
2313 #ifdef HAVE_STDARG_H
2314 Void hugsFPrintf(FILE *fp, const char* fmt, ...) {
2317 if (!disableOutput) {
2318 vfprintf(fp, fmt, ap);
2320 vBufferedPrintf(&outputStreamH, fmt, ap);
2325 Void hugsFPrintf(FILE *fp, const char* fmt, va_list)
2331 if (!disableOutput) {
2332 vfprintf(fp, fmt, ap);
2334 vBufferedPrintf(&outputStreamH, fmt, ap);
2340 Void hugsPutc(c, fp)
2343 if (!disableOutput) {
2346 bufferedPutchar(&outputStreamH, c);
2350 #endif /* REDIRECT_OUTPUT && !HUGS_FOR_WINDOWS */
2351 /* --------------------------------------------------------------------------
2352 * Send message to each component of system:
2353 * ------------------------------------------------------------------------*/
2355 Void everybody(what) /* send command `what' to each component of*/
2356 Int what; { /* system to respond as appropriate ... */
2357 machdep(what); /* The order of calling each component is */
2358 storage(what); /* important for the INSTALL command */
2361 translateControl(what);
2363 staticAnalysis(what);
2364 deriveControl(what);
2370 /* --------------------------------------------------------------------------
2371 * Hugs for Windows code (WinMain and related functions)
2372 * ------------------------------------------------------------------------*/
2374 #if HUGS_FOR_WINDOWS
2375 #include "winhugs.c"