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: 1999/11/12 14:32:44 $
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))) {
580 "Haskell 98 compatibility cannot be changed"
581 " while the interpreter is running\n");
594 static Void local setHeapSize(s)
597 hpSize = argToInt(s);
598 if (hpSize < MINIMUMHEAP)
599 hpSize = MINIMUMHEAP;
600 else if (MAXIMUMHEAP && hpSize > MAXIMUMHEAP)
601 hpSize = MAXIMUMHEAP;
602 if (heapBuilt() && hpSize != heapSize) {
603 /* ToDo: should this use a message box in winhugs? */
605 FPrintf(stderr,"Change to heap size will not take effect until you rerun Hugs\n");
607 FPrintf(stderr,"Cannot change heap size\n");
615 static Int local argToInt(s) /* read integer from argument str */
620 if (*s=='\0' || !isascii((int)(*s)) || !isdigit((int)(*s))) {
621 ERRMSG(0) "Missing integer in option setting \"%s\"", t
626 Int d = (*s++) - '0';
627 if (n > ((MAXPOSINT - d)/10)) {
628 ERRMSG(0) "Option setting \"%s\" is too large", t
632 } while (isascii((int)(*s)) && isdigit((int)(*s)));
634 if (*s=='K' || *s=='k') {
635 if (n > (MAXPOSINT/1000)) {
636 ERRMSG(0) "Option setting \"%s\" is too large", t
643 #if MAXPOSINT > 1000000 /* waste of time on 16 bit systems */
644 if (*s=='M' || *s=='m') {
645 if (n > (MAXPOSINT/1000000)) {
646 ERRMSG(0) "Option setting \"%s\" is too large", t
654 #if MAXPOSINT > 1000000000
655 if (*s=='G' || *s=='g') {
656 if (n > (MAXPOSINT/1000000000)) {
657 ERRMSG(0) "Option setting \"%s\" is too large", t
666 ERRMSG(0) "Unwanted characters after option setting \"%s\"", t
673 /* --------------------------------------------------------------------------
674 * Print Menu of list of commands:
675 * ------------------------------------------------------------------------*/
677 static struct cmd cmds[] = {
678 {":?", HELP}, {":cd", CHGDIR}, {":also", ALSO},
679 {":type", TYPEOF}, {":!", SYSTEM}, {":load", LOAD},
680 {":reload", RELOAD}, {":gc", COLLECT}, {":edit", EDIT},
681 {":quit", QUIT}, {":set", SET}, {":find", FIND},
682 {":names", NAMES}, {":info", INFO}, {":project", PROJECT},
683 {":dump", DUMP}, {":ztats", STATS},
684 {":module",SETMODULE},
686 #if EXPLAIN_INSTANCE_RESOLUTION
689 {":version", PNTVER},
694 static Void local menu() {
695 Printf("LIST OF COMMANDS: Any command may be abbreviated to :c where\n");
696 Printf("c is the first character in the full name.\n\n");
697 Printf(":load <filenames> load modules from specified files\n");
698 Printf(":load clear all files except prelude\n");
699 Printf(":also <filenames> read additional modules\n");
700 Printf(":reload repeat last load command\n");
701 Printf(":project <filename> use project file\n");
702 Printf(":edit <filename> edit file\n");
703 Printf(":edit edit last module\n");
704 Printf(":module <module> set module for evaluating expressions\n");
705 Printf("<expr> evaluate expression\n");
706 Printf(":type <expr> print type of expression\n");
707 Printf(":? display this list of commands\n");
708 Printf(":set <options> set command line options\n");
709 Printf(":set help on command line options\n");
710 Printf(":names [pat] list names currently in scope\n");
711 Printf(":info <names> describe named objects\n");
712 Printf(":browse <modules> browse names defined in <modules>\n");
713 #if EXPLAIN_INSTANCE_RESOLUTION
714 Printf(":xplain <context> explain instance resolution for <context>\n");
716 Printf(":find <name> edit module containing definition of name\n");
717 Printf(":!command shell escape\n");
718 Printf(":cd dir change directory\n");
719 Printf(":gc force garbage collection\n");
720 Printf(":version print Hugs version\n");
721 Printf(":dump <name> print STG code for named fn\n");
722 #ifdef CRUDE_PROFILING
723 Printf(":ztats <name> print reduction stats\n");
725 Printf(":quit exit Hugs interpreter\n");
728 static Void local guidance() {
729 Printf("Command not recognised. ");
733 static Void local forHelp() {
734 Printf("Type :? for help\n");
737 /* --------------------------------------------------------------------------
738 * Setting of command line options:
739 * ------------------------------------------------------------------------*/
741 struct options toggle[] = { /* List of command line toggles */
742 {'s', 1, "Print no. reductions/cells after eval", &showStats},
743 {'t', 1, "Print type after evaluation", &addType},
744 {'g', 1, "Print no. cells recovered after gc", &gcMessages},
745 {'l', 1, "Literate modules as default", &literateScripts},
746 {'e', 1, "Warn about errors in literate modules", &literateErrors},
747 {'.', 1, "Print dots to show progress", &useDots},
748 {'q', 1, "Print nothing to show progress", &quiet},
749 {'w', 1, "Always show which modules are loaded", &listScripts},
750 {'k', 1, "Show kind errors in full", &kindExpert},
751 {'o', 0, "Allow overlapping instances", &allowOverlap},
752 {'O', 1, "Optimise (improve?) generated code", &optimise},
756 {'D', 1, "Debug: show generated code", &debugCode},
758 #if EXPLAIN_INSTANCE_RESOLUTION
759 {'x', 1, "Explain instance resolution", &showInstRes},
762 {'m', 0, "Use multi instance resolution", &multiInstRes},
765 {'D', 1, "Debug: show generated G code", &debugCode},
768 {'S', 1, "Debug: show generated SC code", &debugSC},
771 {'f', 1, "Terminate evaluation on first error", &failOnError},
772 {'u', 1, "Use \"show\" to display results", &useShow},
773 {'i', 1, "Chase imports while loading modules", &chaseImports},
778 static Void local set() { /* change command line options from*/
779 String s; /* Hugs command line */
781 if ((s=readFilename())!=0) {
783 if (!processOption(s)) {
784 ERRMSG(0) "Option string must begin with `+' or `-'"
787 } while ((s=readFilename())!=0);
789 writeRegString("Options", optionsToStr());
796 /* --------------------------------------------------------------------------
797 * Change directory command:
798 * ------------------------------------------------------------------------*/
800 static Void local changeDir() { /* change directory */
801 String s = readFilename();
803 ERRMSG(0) "Unable to change to directory \"%s\"", s
808 /* --------------------------------------------------------------------------
809 * Loading project and script files:
810 * ------------------------------------------------------------------------*/
812 static Void local loadProject(s) /* Load project file */
816 projInput(currProject);
817 scriptFile = currProject;
818 forgetScriptsFrom(1);
819 while ((s=readFilename())!=0)
822 ERRMSG(0) "Empty project file"
826 projectLoaded = TRUE;
829 static Void local clearProject() { /* clear name for current project */
833 projectLoaded = FALSE;
835 setLastEdit((String)0,0);
841 static Void local makeStackEntry ( ScriptInfo* ent, String iname )
844 Bool sAvail, iAvail, oAvail;
845 Time sTime, iTime, oTime;
846 Long sSize, iSize, oSize;
849 ok = findFilesForModule (
853 &sAvail, &sTime, &sSize,
854 &iAvail, &iTime, &iSize,
855 &oAvail, &oTime, &oSize
859 /* "Can't file source or object+interface for module \"%s\"", */
860 "Can't file source for module \"%s\"",
864 /* findFilesForModule should enforce this */
865 if (!(sAvail || (oAvail && iAvail)))
867 /* Load objects in preference to sources if both are available */
868 /* 11 Oct 99: disable object loading in the interim.
869 Will probably only reinstate when HEP becomes available.
871 ? (oAvail && iAvail && timeEarlier(sTime,oTime))
876 /* ToDo: namesUpto overflow */
877 ent->modName = strCopy(iname);
880 ent->fromSource = !fromObj;
882 ent->postponed = FALSE;
883 ent->lastChange = sTime; /* ToDo: is this right? */
884 ent->size = fromObj ? iSize : sSize;
885 ent->oSize = fromObj ? oSize : 0;
886 ent->objLoaded = FALSE;
891 static Void nukeEnding( String s )
894 if (l > 2 && strncmp(s+l-2,".o" ,3)==0) s[l-2] = 0; else
895 if (l > 3 && strncmp(s+l-3,".hi" ,3)==0) s[l-3] = 0; else
896 if (l > 3 && strncmp(s+l-3,".hs" ,3)==0) s[l-3] = 0; else
897 if (l > 4 && strncmp(s+l-4,".lhs",4)==0) s[l-4] = 0; else
898 if (l > 4 && strncmp(s+l-4,".dll",4)==0) s[l-4] = 0; else
899 if (l > 4 && strncmp(s+l-4,".DLL",4)==0) s[l-4] = 0;
902 static Void local addStackEntry(s) /* Add script to list of scripts */
903 String s; { /* to be read in ... */
908 if (namesUpto>=NUM_SCRIPTS) {
909 ERRMSG(0) "Too many module files (maximum of %d allowed)",
916 for (s2 = s; *s2; s2++)
917 if (*s2 == SLASH && *(s2+1)) s = s2+1;
920 for (i = 0; i < namesUpto; i++)
921 if (strcmp(scriptInfo[i].modName,s)==0)
925 makeStackEntry ( &scriptInfo[namesUpto], strCopy(s) );
931 /* Return TRUE if no imports were needed; FALSE otherwise. */
932 static Bool local addScript(stacknum) /* read single file */
934 static char name[FILENAME_MAX+1];
935 Int len = scriptInfo[stacknum].size;
937 #if HUGS_FOR_WINDOWS /* Set clock cursor while loading */
939 SetCursor(LoadCursor(NULL, IDC_WAIT));
942 // setLastEdit(name,0);
945 strcpy(name, scriptInfo[stacknum].path);
946 strcat(name, scriptInfo[stacknum].modName);
947 if (scriptInfo[stacknum].fromSource)
948 strcat(name, scriptInfo[stacknum].srcExt); else
953 if (scriptInfo[stacknum].fromSource) {
954 if (lastWasObject) finishInterfaces();
955 lastWasObject = FALSE;
956 Printf("Reading script \"%s\":\n",name);
957 needsImports = FALSE;
958 parseScript(name,len);
959 if (needsImports) return FALSE;
964 Printf("Reading iface \"%s\":\n", name);
966 needsImports = FALSE;
968 // set nameObj for the benefit of openGHCIface
969 strcpy(nameObj, scriptInfo[stacknum].path);
970 strcat(nameObj, scriptInfo[stacknum].modName);
971 strcat(nameObj, DLL_ENDING);
972 sizeObj = scriptInfo[stacknum].oSize;
974 loadInterface(name,len);
976 lastWasObject = TRUE;
977 if (needsImports) return FALSE;
981 preludeLoaded = TRUE;
986 Bool chase(imps) /* Process list of import requests */
990 Int origPos = numScripts; /* keep track of original position */
991 String origName = scriptInfo[origPos].modName;
992 for (; nonNull(imps); imps=tl(imps)) {
993 String iname = textToStr(textOf(hd(imps)));
995 for (; i<namesUpto; i++)
996 if (strcmp(scriptInfo[i].modName,iname)==0)
998 //fprintf(stderr, "import name = %s num = %d\n", iname, i );
1001 /* We should have filled in the details of each module
1002 the first time we hear about it.
1004 assert(scriptInfo[i].details);
1007 if (i>=origPos) { /* Neither loaded or queued */
1013 needsImports = TRUE;
1014 if (scriptInfo[origPos].fromSource)
1015 scriptInfo[origPos].postponed = TRUE;
1017 if (i==namesUpto) { /* Name not found (i==namesUpto) */
1018 /* Find out where it lives, whether source or object, etc */
1019 makeStackEntry ( &scriptInfo[i], iname );
1023 if (scriptInfo[i].postponed && scriptInfo[i].fromSource) {
1024 /* Check for recursive dependency */
1026 "Recursive import dependency between \"%s\" and \"%s\"",
1027 scriptInfo[origPos].modName, iname
1030 /* Move stack entry i to somewhere below origPos. If i denotes
1031 * an object, destination is immediately below origPos.
1032 * Otherwise, it's underneath the queue of objects below origPos.
1034 dstPosn = origPos-1;
1035 if (scriptInfo[i].fromSource)
1036 while (!scriptInfo[dstPosn].fromSource && dstPosn > 0)
1040 tmp = scriptInfo[i];
1041 for (; i > dstPosn; i--) scriptInfo[i] = scriptInfo[i-1];
1042 scriptInfo[dstPosn] = tmp;
1043 if (dstPosn < nextNumScripts) nextNumScripts = dstPosn;
1047 return needsImports;
1050 static Void local forgetScriptsFrom(scno)/* remove scripts from system */
1054 for (i=scno; i<namesUpto; ++i)
1056 free(scriptName[i]);
1058 dropScriptsFrom(scno-1);
1060 if (numScripts>namesUpto)
1064 /* --------------------------------------------------------------------------
1065 * Commands for loading and removing script files:
1066 * ------------------------------------------------------------------------*/
1068 static Void local load() { /* read filenames from command line */
1069 String s; /* and add to list of scripts waiting */
1071 while ((s=readFilename())!=0)
1076 static Void local project() { /* read list of script names from */
1077 String s; /* project file */
1079 if ((s=readFilename()) || currProject) {
1081 s = strCopy(currProject);
1082 else if (readFilename()) {
1083 ERRMSG(0) "Too many project files"
1090 ERRMSG(0) "No project filename specified"
1097 static Void local readScripts(n) /* Reread current list of scripts, */
1098 Int n; { /* loading everything after and */
1099 Time timeStamp; /* including the first script which*/
1100 Long fileSize; /* has been either changed or added*/
1101 static char name[FILENAME_MAX+1];
1103 lastWasObject = FALSE;
1104 ppSmStack("readscripts-begin");
1105 #if HUGS_FOR_WINDOWS
1106 SetCursor(LoadCursor(NULL, IDC_WAIT));
1110 for (; n<numScripts; n++) { /* Scan previously loaded scripts */
1111 ppSmStack("readscripts-loop1");
1112 getFileInfo(scriptName[n], &timeStamp, &fileSize);
1113 if (timeChanged(timeStamp,lastChange[n])) {
1114 dropScriptsFrom(n-1);
1119 for (; n<NUM_SCRIPTS; n++) /* No scripts have been postponed */
1120 postponed[n] = FALSE; /* at this stage */
1123 while (numScripts<namesUpto) { /* Process any remaining scripts */
1124 ppSmStack("readscripts-loop2");
1125 getFileInfo(scriptName[numScripts], &timeStamp, &fileSize);
1126 timeSet(lastChange[numScripts],timeStamp);
1127 if (numScripts>0) /* no new script for prelude */
1128 startNewScript(scriptName[numScripts]);
1129 if (addScript(scriptName[numScripts],fileSize))
1132 dropScriptsFrom(numScripts-1);
1138 for (; n<numScripts; n++) {
1139 ppSmStack("readscripts-loop2");
1140 strcpy(name, scriptInfo[n].path);
1141 strcat(name, scriptInfo[n].modName);
1142 if (scriptInfo[n].fromSource)
1143 strcat(name, scriptInfo[n].srcExt); else
1144 strcat(name, ".hi"); //ToDo: should be .o
1145 getFileInfo(name,&timeStamp, &fileSize);
1146 if (timeChanged(timeStamp,scriptInfo[n].lastChange)) {
1147 dropScriptsFrom(n-1);
1152 for (; n<NUM_SCRIPTS; n++)
1153 scriptInfo[n].postponed = FALSE;
1157 while (numScripts < namesUpto) {
1158 ppSmStack ( "readscripts-loop2" );
1160 if (scriptInfo[numScripts].fromSource) {
1163 startNewScript(scriptInfo[numScripts].modName);
1164 nextNumScripts = NUM_SCRIPTS; //bogus initialisation
1165 if (addScript(numScripts)) {
1167 assert(nextNumScripts==NUM_SCRIPTS);
1170 dropScriptsFrom(numScripts-1);
1174 if (scriptInfo[numScripts].objLoaded) {
1177 scriptInfo[numScripts].objLoaded = TRUE;
1180 startNewScript(scriptInfo[numScripts].modName);
1182 nextNumScripts = NUM_SCRIPTS;
1183 if (addScript(numScripts)) {
1185 assert(nextNumScripts==NUM_SCRIPTS);
1187 //while (!scriptInfo[numScripts].fromSource && numScripts > 0)
1189 //if (scriptInfo[numScripts].fromSource)
1191 numScripts = nextNumScripts;
1192 assert(nextNumScripts<NUM_SCRIPTS);
1196 if (numScripts==namesUpto) ppSmStack( "readscripts-final") ;
1201 { Int m = namesUpto-1;
1202 Text mtext = findText(scriptInfo[m].modName);
1203 /* Commented out till we understand what
1204 * this is trying to do.
1205 * Problem, you cant find a module till later.
1208 setCurrModule(findModule(mtext));
1218 setLastEdit((String)0, 0);
1219 ppSmStack("readscripts-end ");
1222 static Void local whatScripts() { /* list scripts in current session */
1224 Printf("\nHugs session for:");
1226 Printf(" (project: %s)",currProject);
1227 for (i=0; i<numScripts; ++i)
1228 Printf("\n%s%s",scriptInfo[i].path, scriptInfo[i].modName);
1232 /* --------------------------------------------------------------------------
1233 * Access to external editor:
1234 * ------------------------------------------------------------------------*/
1236 static Void local editor() { /* interpreter-editor interface */
1237 String newFile = readFilename();
1239 setLastEdit(newFile,0);
1240 if (readFilename()) {
1241 ERRMSG(0) "Multiple filenames not permitted"
1248 static Void local find() { /* edit file containing definition */
1250 This just plain wont work no more.
1252 String nm = readFilename(); /* of specified name */
1254 ERRMSG(0) "No name specified"
1257 else if (readFilename()) {
1258 ERRMSG(0) "Multiple names not permitted"
1264 setCurrModule(findEvalModule());
1266 if (nonNull(c=findTycon(t=findText(nm)))) {
1267 if (startEdit(tycon(c).line,scriptName[scriptThisTycon(c)])) {
1270 } else if (nonNull(c=findName(t))) {
1271 if (startEdit(name(c).line,scriptName[scriptThisName(c)])) {
1275 ERRMSG(0) "No current definition for name \"%s\"", nm
1282 static Void local runEditor() { /* run editor on script lastEdit */
1283 if (startEdit(lastEdLine,lastEdit)) /* at line lastEdLine */
1287 static Void local setLastEdit(fname,line)/* keep name of last file to edit */
1292 lastEdit = strCopy(fname);
1294 #if HUGS_FOR_WINDOWS
1295 DrawStatusLine(hWndMain); /* Redo status line */
1299 /* --------------------------------------------------------------------------
1300 * Read and evaluate an expression:
1301 * ------------------------------------------------------------------------*/
1303 static Void local setModule(){/*set module in which to evaluate expressions*/
1304 String s = readFilename();
1305 if (!s) s = ""; /* :m clears the current module selection */
1306 evalModule = findText(s);
1307 setLastEdit(fileOfModule(findEvalModule()),0);
1310 static Module local findEvalModule() { /*Module in which to eval expressions*/
1311 Module m = findModule(evalModule);
1317 static Void local evaluator() { /* evaluate expr and print value */
1321 setCurrModule(findEvalModule());
1323 startNewScript(0); /* Enables recovery of storage */
1324 /* allocated during evaluation */
1327 defaultDefns = evalDefaults;
1328 type = typeCheckExp(TRUE);
1329 if (isPolyType(type)) {
1330 ks = polySigOf(type);
1331 bd = monotypeOf(type);
1336 if (whatIs(bd)==QUAL) {
1337 ERRMSG(0) "Unresolved overloading" ETHEN
1338 ERRTEXT "\n*** Type : " ETHEN ERRTYPE(type);
1339 ERRTEXT "\n*** Expression : " ETHEN ERREXPR(inputExpr);
1349 if (typeMatches(type,ap(typeIO,typeUnit))) {
1350 inputExpr = ap(nameRunIO,inputExpr);
1354 Cell d = provePred(ks,NIL,ap(classShow,bd));
1356 ERRMSG(0) "Cannot find \"show\" function for:" ETHEN
1357 ERRTEXT "\n*** expression : " ETHEN ERREXPR(inputExpr);
1358 ERRTEXT "\n*** of type : " ETHEN ERRTYPE(type);
1362 inputExpr = ap2(findName(findText("show")),d,inputExpr);
1363 inputExpr = ap(findName(findText("putStr")), inputExpr);
1364 inputExpr = ap(nameRunIO, inputExpr);
1366 evalExp(); printf("\n");
1369 printType(stdout,type);
1376 printf ( "result type is " );
1377 printType ( stdout, type );
1386 static Void local stopAnyPrinting() { /* terminate printing of expression,*/
1387 if (printing) { /* after successful termination or */
1388 printing = FALSE; /* runtime error (e.g. interrupt) */
1391 #define plural(v) v, (v==1?"":"s")
1392 Printf("%lu cell%s",plural(numCells));
1394 Printf(", %u garbage collection%s",plural(numGcs));
1403 /* --------------------------------------------------------------------------
1404 * Print type of input expression:
1405 * ------------------------------------------------------------------------*/
1407 static Void local showtype() { /* print type of expression (if any)*/
1410 setCurrModule(findEvalModule());
1411 startNewScript(0); /* Enables recovery of storage */
1412 /* allocated during evaluation */
1415 defaultDefns = evalDefaults;
1416 type = typeCheckExp(FALSE);
1417 printExp(stdout,inputExpr);
1419 printType(stdout,type);
1424 static Void local browseit(mod,t)
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 if (name(nm).mod == mod) {
1434 /* unwanted artifacts, like lambda lifted values,
1435 are in the list of names, but have no types */
1436 if (nonNull(name(nm).type)) {
1437 printExp(stdout,nm);
1439 printType(stdout,name(nm).type);
1441 Printf(" -- data constructor");
1442 } else if (isMfun(nm)) {
1443 Printf(" -- class member");
1444 } else if (isSfun(nm)) {
1445 Printf(" -- selector function");
1453 Printf("Unknown module %s\n",t);
1458 static Void local browse() { /* browse modules */
1459 Int count = 0; /* or give menu of commands */
1462 setCurrModule(findEvalModule());
1463 startNewScript(0); /* for recovery of storage */
1464 for (; (s=readFilename())!=0; count++) {
1465 browseit(findModule(findText(s)),s);
1472 #if EXPLAIN_INSTANCE_RESOLUTION
1473 static Void local xplain() { /* print type of expression (if any)*/
1476 Bool sir = showInstRes;
1478 setCurrModule(findEvalModule());
1479 startNewScript(0); /* Enables recovery of storage */
1480 /* allocated during evaluation */
1484 d = provePred(NIL,NIL,hd(inputContext));
1486 fprintf(stdout, "not Sat\n");
1488 fprintf(stdout, "Sat\n");
1494 /* --------------------------------------------------------------------------
1495 * Enhanced help system: print current list of scripts or give information
1497 * ------------------------------------------------------------------------*/
1499 static String local objToStr(m,c)
1502 #if 1 || DISPLAY_QUANTIFIERS
1503 static char newVar[60];
1504 switch (whatIs(c)) {
1505 case NAME : if (m == name(c).mod) {
1506 sprintf(newVar,"%s", textToStr(name(c).text));
1508 sprintf(newVar,"%s.%s",
1509 textToStr(module(name(c).mod).text),
1510 textToStr(name(c).text));
1514 case TYCON : if (m == tycon(c).mod) {
1515 sprintf(newVar,"%s", textToStr(tycon(c).text));
1517 sprintf(newVar,"%s.%s",
1518 textToStr(module(tycon(c).mod).text),
1519 textToStr(tycon(c).text));
1523 case CLASS : if (m == cclass(c).mod) {
1524 sprintf(newVar,"%s", textToStr(cclass(c).text));
1526 sprintf(newVar,"%s.%s",
1527 textToStr(module(cclass(c).mod).text),
1528 textToStr(cclass(c).text));
1532 default : internal("objToStr");
1536 static char newVar[33];
1537 switch (whatIs(c)) {
1538 case NAME : sprintf(newVar,"%s", textToStr(name(c).text));
1541 case TYCON : sprintf(newVar,"%s", textToStr(tycon(c).text));
1544 case CLASS : sprintf(newVar,"%s", textToStr(cclass(c).text));
1547 default : internal("objToStr");
1555 static Void local dumpStg( void ) { /* print STG stuff */
1560 Cell v; /* really StgVar */
1561 setCurrModule(findEvalModule());
1563 for (; (s=readFilename())!=0;) {
1566 /* find the name while ignoring module scopes */
1567 for (i=NAMEMIN; i<nameHw; i++)
1568 if (name(i).text == t) n = i;
1570 /* perhaps it's an "idNNNNNN" thing? */
1573 s[0]=='i' && s[1]=='d' && isdigit(s[2])) {
1576 while (isdigit(s[i])) {
1577 v = v * 10 + (s[i]-'0');
1581 n = nameFromStgVar(v);
1584 if (isNull(n) && whatIs(v)==STGVAR) {
1585 Printf ( "\n{- `%s' has no nametable entry -}\n", s );
1586 Printf ( "{- stgSize of body is %d -}\n\n", stgSize(stgVarBody(v)));
1587 printStg(stderr, v );
1590 Printf ( "Unknown reference `%s'\n", s );
1593 Printf ( "Not a Name: `%s'\n", s );
1595 if (isNull(name(n).stgVar)) {
1596 Printf ( "Doesn't have a STG tree: %s\n", s );
1598 Printf ( "\n{- stgVar of `%s' is id%d -}\n", s, -name(n).stgVar);
1599 Printf ( "{- stgSize of body is %d -}\n\n",
1600 stgSize(stgVarBody(name(n).stgVar)));
1601 printStg(stderr, name(n).stgVar);
1606 static Void local info() { /* describe objects */
1607 Int count = 0; /* or give menu of commands */
1610 setCurrModule(findEvalModule());
1611 startNewScript(0); /* for recovery of storage */
1612 for (; (s=readFilename())!=0; count++) {
1613 describe(findText(s));
1621 static Void local describe(t) /* describe an object */
1623 Tycon tc = findTycon(t);
1624 Class cl = findClass(t);
1625 Name nm = findName(t);
1627 if (nonNull(tc)) { /* as a type constructor */
1631 for (i=0; i<tycon(tc).arity; ++i) {
1632 t = ap(t,mkOffset(i));
1634 Printf("-- type constructor");
1636 Printf(" with kind ");
1637 printKind(stdout,tycon(tc).kind);
1640 switch (tycon(tc).what) {
1641 case SYNONYM : Printf("type ");
1642 printType(stdout,t);
1644 printType(stdout,tycon(tc).defn);
1648 case DATATYPE : { List cs = tycon(tc).defn;
1649 if (tycon(tc).what==DATATYPE) {
1654 printType(stdout,t);
1656 mapProc(printSyntax,cs);
1658 Printf("\n-- constructors:");
1660 for (; hasCfun(cs); cs=tl(cs)) {
1662 printExp(stdout,hd(cs));
1664 printType(stdout,name(hd(cs)).type);
1667 Printf("\n-- selectors:");
1669 for (; nonNull(cs); cs=tl(cs)) {
1671 printExp(stdout,hd(cs));
1673 printType(stdout,name(hd(cs)).type);
1678 case RESTRICTSYN : Printf("type ");
1679 printType(stdout,t);
1680 Printf(" = <restricted>");
1684 if (nonNull(in=findFirstInst(tc))) {
1685 Printf("\n-- instances:\n");
1688 in = findNextInst(tc,in);
1689 } while (nonNull(in));
1694 if (nonNull(cl)) { /* as a class */
1695 List ins = cclass(cl).instances;
1696 Kinds ks = cclass(cl).kinds;
1697 if (nonNull(ks) && isNull(tl(ks)) && hd(ks)==STAR) {
1698 Printf("-- type class");
1700 Printf("-- constructor class");
1702 Printf(" with arity ");
1703 printKinds(stdout,ks);
1707 mapProc(printSyntax,cclass(cl).members);
1709 if (nonNull(cclass(cl).supers)) {
1710 printContext(stdout,cclass(cl).supers);
1713 printPred(stdout,cclass(cl).head);
1715 if (nonNull(cclass(cl).fds)) {
1716 List fds = cclass(cl).fds;
1718 for (; nonNull(fds); fds=tl(fds)) {
1720 printFD(stdout,hd(fds));
1725 if (nonNull(cclass(cl).members)) {
1726 List ms = cclass(cl).members;
1729 Type t = name(hd(ms)).type;
1730 if (isPolyType(t)) {
1734 printExp(stdout,hd(ms));
1736 if (isNull(tl(fst(snd(t))))) {
1739 t = ap(QUAL,pair(tl(fst(snd(t))),snd(snd(t))));
1741 printType(stdout,t);
1743 } while (nonNull(ms));
1747 Printf("\n-- instances:\n");
1751 } while (nonNull(ins));
1756 if (nonNull(nm)) { /* as a function/name */
1758 printExp(stdout,nm);
1760 if (nonNull(name(nm).type)) {
1761 printType(stdout,name(nm).type);
1763 Printf("<unknown type>");
1767 Printf(" -- data constructor");
1768 } else if (isMfun(nm)) {
1769 Printf(" -- class member");
1770 } else if (isSfun(nm)) {
1771 Printf(" -- selector function");
1777 if (isNull(tc) && isNull(cl) && isNull(nm)) {
1778 Printf("Unknown reference `%s'\n",textToStr(t));
1782 static Void local printSyntax(nm)
1784 Syntax sy = syntaxOf(nm);
1785 Text t = name(nm).text;
1786 String s = textToStr(t);
1787 if (sy != defaultSyntax(t)) {
1789 switch (assocOf(sy)) {
1790 case LEFT_ASS : Putchar('l'); break;
1791 case RIGHT_ASS : Putchar('r'); break;
1792 case NON_ASS : break;
1794 Printf(" %i ",precOf(sy));
1795 if (isascii((int)(*s)) && isalpha((int)(*s))) {
1804 static Void local showInst(in) /* Display instance decl header */
1806 Printf("instance ");
1807 if (nonNull(inst(in).specifics)) {
1808 printContext(stdout,inst(in).specifics);
1811 printPred(stdout,inst(in).head);
1815 /* --------------------------------------------------------------------------
1816 * List all names currently in scope:
1817 * ------------------------------------------------------------------------*/
1819 static Void local listNames() { /* list names matching optional pat*/
1820 String pat = readFilename();
1822 Int width = getTerminalWidth() - 1;
1825 Module mod = findEvalModule();
1827 if (pat) { /* First gather names to list */
1829 names = addNamesMatching(pat,names);
1830 } while ((pat=readFilename())!=0);
1832 names = addNamesMatching((String)0,names);
1834 if (isNull(names)) { /* Then print them out */
1835 ERRMSG(0) "No names selected"
1838 for (termPos=0; nonNull(names); names=tl(names)) {
1839 String s = objToStr(mod,hd(names));
1841 if (termPos+1+l>width) {
1844 } else if (termPos>0) {
1852 Printf("\n(%d names listed)\n", count);
1855 /* --------------------------------------------------------------------------
1856 * print a prompt and read a line of input:
1857 * ------------------------------------------------------------------------*/
1859 static Void local promptForInput(moduleName)
1860 String moduleName; {
1861 char promptBuffer[1000];
1863 /* This is portable but could overflow buffer */
1864 sprintf(promptBuffer,prompt,moduleName);
1866 /* Works on ANSI C - but pre-ANSI compilers return a pointer to
1867 * promptBuffer instead.
1869 if (sprintf(promptBuffer,prompt,moduleName) >= 1000) {
1870 /* Reset prompt to a safe default to avoid an infinite loop */
1872 prompt = strCopy("? ");
1873 internal("Combined prompt and evaluation module name too long");
1877 stringInput("main\0"); else
1878 consoleInput(promptBuffer);
1881 /* --------------------------------------------------------------------------
1882 * main read-eval-print loop, with error trapping:
1883 * ------------------------------------------------------------------------*/
1885 static jmp_buf catch_error; /* jump buffer for error trapping */
1887 static Void local interpreter(argc,argv)/* main interpreter loop */
1890 Int errorNumber = setjmp(catch_error);
1892 if (errorNumber && autoMain) {
1893 fprintf(stderr, "hugs +Q: compilation failed -- can't run `main'\n" );
1897 breakOn(TRUE); /* enable break trapping */
1898 if (numScripts==0) { /* only succeeds on first time, */
1899 if (errorNumber) /* before prelude has been loaded */
1900 fatal("Unable to load prelude");
1901 initialize(argc,argv);
1905 /* initialize calls startupHaskell, which trashes our signal handlers */
1910 everybody(RESET); /* reset to sensible initial state */
1911 dropScriptsFrom(numScripts-1); /* remove partially loaded scripts */
1912 /* not counting prelude as a script*/
1914 promptForInput(textToStr(module(findEvalModule()).text));
1916 cmd = readCommand(cmds, (Char)':', (Char)'!');
1921 case EDIT : editor();
1925 case LOAD : clearProject();
1926 forgetScriptsFrom(1);
1929 case ALSO : clearProject();
1930 forgetScriptsFrom(numScripts);
1933 case RELOAD : readScripts(1);
1935 case PROJECT: project();
1940 case EVAL : evaluator();
1942 case TYPEOF : showtype();
1944 case BROWSE : browse();
1946 #if EXPLAIN_INSTANCE_RESOLUTION
1947 case XPLAIN : xplain();
1950 case NAMES : listNames();
1954 case BADCMD : guidance();
1959 #ifdef CRUDE_PROFILING
1963 case SYSTEM : if (shellEsc(readLine()))
1964 Printf("Warning: Shell escape terminated abnormally\n");
1966 case CHGDIR : changeDir();
1970 case PNTVER: Printf("-- Hugs Version %s\n",
1973 case DUMP : dumpStg();
1976 case COLLECT: consGC = FALSE;
1979 Printf("Garbage collection recovered %d cells\n",
1986 Printf("Elapsed time (ms): %ld (user), %ld (system)\n",
1987 millisecs(userElapsed), millisecs(systElapsed));
1989 if (autoMain) break;
1994 /* --------------------------------------------------------------------------
1995 * Display progress towards goal:
1996 * ------------------------------------------------------------------------*/
1998 static Target currTarget;
1999 static Bool aiming = FALSE;
2002 static Int charCount;
2004 Void setGoal(what, t) /* Set goal for what to be t */
2008 currTarget = (t?t:1);
2011 currPos = strlen(what);
2012 maxPos = getTerminalWidth() - 1;
2016 for (charCount=0; *what; charCount++)
2021 Void soFar(t) /* Indicate progress towards goal */
2022 Target t; { /* has now reached t */
2025 Int newPos = (Int)((maxPos * ((long)t))/currTarget);
2030 if (newPos>currPos) {
2033 while (newPos>++currPos);
2040 Void done() { /* Goal has now been achieved */
2043 while (maxPos>currPos++)
2048 for (; charCount>0; charCount--) {
2057 static Void local failed() { /* Goal cannot be reached due to */
2058 if (aiming) { /* errors */
2065 /* --------------------------------------------------------------------------
2067 * ------------------------------------------------------------------------*/
2069 Void errHead(l) /* print start of error message */
2071 failed(); /* failed to reach target ... */
2073 FPrintf(errorStream,"ERROR");
2076 FPrintf(errorStream," \"%s\"", scriptFile);
2077 setLastEdit(scriptFile,l);
2078 if (l) FPrintf(errorStream," (line %d)",l);
2081 FPrintf(errorStream,": ");
2082 FFlush(errorStream);
2085 Void errFail() { /* terminate error message and */
2086 Putc('\n',errorStream); /* produce exception to return to */
2087 FFlush(errorStream); /* main command loop */
2088 longjmp(catch_error,1);
2091 Void errAbort() { /* altern. form of error handling */
2092 failed(); /* used when suitable error message*/
2093 stopAnyPrinting(); /* has already been printed */
2097 Void internal(msg) /* handle internal error */
2099 #if HUGS_FOR_WINDOWS
2101 wsprintf(buf,"INTERNAL ERROR: %s",msg);
2102 MessageBox(hWndMain, buf, appName, MB_ICONHAND | MB_OK);
2106 Printf("INTERNAL ERROR: %s\n",msg);
2108 longjmp(catch_error,1);
2111 Void fatal(msg) /* handle fatal error */
2113 #if HUGS_FOR_WINDOWS
2115 wsprintf(buf,"FATAL ERROR: %s",msg);
2116 MessageBox(hWndMain, buf, appName, MB_ICONHAND | MB_OK);
2119 Printf("\nFATAL ERROR: %s\n",msg);
2124 sigHandler(breakHandler) { /* respond to break interrupt */
2125 #if HUGS_FOR_WINDOWS
2126 MessageBox(GetFocus(), "Interrupted!", appName, MB_ICONSTOP | MB_OK);
2129 Printf("{Interrupted!}\n");
2131 breakOn(TRUE); /* reinstall signal handler - redundant on BSD systems */
2132 /* but essential on POSIX (and other?) systems */
2138 longjmp(catch_error,1);
2139 sigResume;/*NOTREACHED*/
2142 /* --------------------------------------------------------------------------
2143 * Read value from environment variable or registry:
2144 * ------------------------------------------------------------------------*/
2146 String fromEnv(var,def) /* return value of: */
2147 String var; /* environment variable named by var */
2148 String def; { /* or: default value given by def */
2149 String s = getenv(var);
2150 return (s ? s : def);
2153 /* --------------------------------------------------------------------------
2154 * String manipulation routines:
2155 * ------------------------------------------------------------------------*/
2157 static String local strCopy(s) /* make malloced copy of a string */
2161 if ((t=(char *)malloc(strlen(s)+1))==0) {
2162 ERRMSG(0) "String storage space exhausted"
2165 for (r=t; (*r++ = *s++)!=0; ) {
2172 /* --------------------------------------------------------------------------
2174 * We can redirect compiler output (prompts, error messages, etc) by
2175 * tweaking these functions.
2176 * ------------------------------------------------------------------------*/
2178 #if REDIRECT_OUTPUT && !HUGS_FOR_WINDOWS
2180 #ifdef HAVE_STDARG_H
2183 #include <varargs.h>
2186 /* ----------------------------------------------------------------------- */
2188 #define BufferSize 10000 /* size of redirected output buffer */
2190 typedef struct _HugsStream {
2191 char buffer[BufferSize]; /* buffer for redirected output */
2192 Int next; /* next space in buffer */
2195 static Void local vBufferedPrintf Args((HugsStream*, const char*, va_list));
2196 static Void local bufferedPutchar Args((HugsStream*, Char));
2197 static String local bufferClear Args((HugsStream *stream));
2199 static Void local vBufferedPrintf(stream, fmt, ap)
2203 Int spaceLeft = BufferSize - stream->next;
2204 char* p = &stream->buffer[stream->next];
2205 Int charsAdded = vsnprintf(p, spaceLeft, fmt, ap);
2206 if (0 <= charsAdded && charsAdded < spaceLeft)
2207 stream->next += charsAdded;
2208 #if 1 /* we can either buffer the first n chars or buffer the last n chars */
2214 static Void local bufferedPutchar(stream, c)
2217 if (BufferSize - stream->next >= 2) {
2218 stream->buffer[stream->next++] = c;
2219 stream->buffer[stream->next] = '\0';
2223 static String local bufferClear(stream)
2224 HugsStream *stream; {
2225 if (stream->next == 0) {
2229 return stream->buffer;
2233 /* ----------------------------------------------------------------------- */
2235 static HugsStream outputStreamH;
2237 * We rely on standard C semantics to initialise outputStreamH.next to 0.
2240 Void hugsEnableOutput(f)
2245 String hugsClearOutputBuffer() {
2246 return bufferClear(&outputStreamH);
2249 #ifdef HAVE_STDARG_H
2250 Void hugsPrintf(const char *fmt, ...) {
2251 va_list ap; /* pointer into argument list */
2252 va_start(ap, fmt); /* make ap point to first arg after fmt */
2253 if (!disableOutput) {
2256 vBufferedPrintf(&outputStreamH, fmt, ap);
2258 va_end(ap); /* clean up */
2261 Void hugsPrintf(fmt, va_alist)
2264 va_list ap; /* pointer into argument list */
2265 va_start(ap); /* make ap point to first arg after fmt */
2266 if (!disableOutput) {
2269 vBufferedPrintf(&outputStreamH, fmt, ap);
2271 va_end(ap); /* clean up */
2277 if (!disableOutput) {
2280 bufferedPutchar(&outputStreamH, c);
2284 Void hugsFlushStdout() {
2285 if (!disableOutput) {
2292 if (!disableOutput) {
2297 #ifdef HAVE_STDARG_H
2298 Void hugsFPrintf(FILE *fp, const char* fmt, ...) {
2301 if (!disableOutput) {
2302 vfprintf(fp, fmt, ap);
2304 vBufferedPrintf(&outputStreamH, fmt, ap);
2309 Void hugsFPrintf(FILE *fp, const char* fmt, va_list)
2315 if (!disableOutput) {
2316 vfprintf(fp, fmt, ap);
2318 vBufferedPrintf(&outputStreamH, fmt, ap);
2324 Void hugsPutc(c, fp)
2327 if (!disableOutput) {
2330 bufferedPutchar(&outputStreamH, c);
2334 #endif /* REDIRECT_OUTPUT && !HUGS_FOR_WINDOWS */
2335 /* --------------------------------------------------------------------------
2336 * Send message to each component of system:
2337 * ------------------------------------------------------------------------*/
2339 Void everybody(what) /* send command `what' to each component of*/
2340 Int what; { /* system to respond as appropriate ... */
2341 machdep(what); /* The order of calling each component is */
2342 storage(what); /* important for the INSTALL command */
2345 translateControl(what);
2347 staticAnalysis(what);
2348 deriveControl(what);
2355 /* --------------------------------------------------------------------------
2356 * Hugs for Windows code (WinMain and related functions)
2357 * ------------------------------------------------------------------------*/
2359 #if HUGS_FOR_WINDOWS
2360 #include "winhugs.c"