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: 1999/12/03 17:01:20 $
14 * ------------------------------------------------------------------------*/
32 #include "Assembler.h" /* DEBUG_LoadSymbols */
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 * ------------------------------------------------------------------------*/
100 Bool combined = TRUE;
107 /* --------------------------------------------------------------------------
109 * ------------------------------------------------------------------------*/
111 static Bool printing = FALSE; /* TRUE => currently printing value*/
112 static Bool showStats = FALSE; /* TRUE => print stats after eval */
113 static Bool listScripts = TRUE; /* TRUE => list scripts after loading*/
114 static Bool addType = FALSE; /* TRUE => print type with value */
115 static Bool useDots = RISCOS; /* TRUE => use dots in progress */
116 static Bool quiet = FALSE; /* TRUE => don't show progress */
117 static Bool lastWasObject = FALSE;
118 Bool preludeLoaded = FALSE;
119 Bool debugSC = FALSE;
123 String modName; /* Module name */
124 Bool details; /* FALSE => remaining fields are invalid */
125 String path; /* Path to module */
126 String srcExt; /* ".hs" or ".lhs" if fromSource */
127 Time lastChange; /* Time of last change to script */
128 Bool fromSource; /* FALSE => load object code */
129 Bool postponed; /* Indicates postponed load */
136 static Void local makeStackEntry Args((ScriptInfo*,String));
137 static Void local addStackEntry Args((String));
139 static ScriptInfo scriptInfo[NUM_SCRIPTS];
141 static Int numScripts; /* Number of scripts loaded */
142 static Int nextNumScripts;
143 static Int namesUpto; /* Number of script names set */
144 static Bool needsImports; /* set to TRUE if imports required */
145 String scriptFile; /* Name of current script (if any) */
149 static Text evalModule = 0; /* Name of module we eval exprs in */
150 static String currProject = 0; /* Name of current project file */
151 static Bool projectLoaded = FALSE; /* TRUE => project file loaded */
153 static Bool autoMain = FALSE;
154 static String lastEdit = 0; /* Name of script to edit (if any) */
155 static Int lastEdLine = 0; /* Editor line number (if possible)*/
156 static String prompt = 0; /* Prompt string */
157 static Int hpSize = DEFAULTHEAP; /* Desired heap size */
158 String hugsEdit = 0; /* String for editor command */
159 String hugsPath = 0; /* String for file search path */
162 static Bool disableOutput = FALSE; /* redirect output to buffer? */
165 String bool2str ( Bool b )
167 if (b) return "Yes"; else return "No ";
170 void ppSmStack ( String who )
174 fflush(stdout);fflush(stderr);
176 printf ( "ppSmStack %s: numScripts = %d namesUpto = %d needsImports = %s\n",
177 who, numScripts, namesUpto, bool2str(needsImports) );
178 assert (namesUpto >= numScripts);
179 printf ( " Det FrS Pst ObL Module Ext Size ModTime Path\n" );
180 for (i = namesUpto-1; i >= 0; i--) {
181 printf ( "%c%2d: %3s %3s %3s %3s %16s %-4s %5ld %8lx %s\n",
182 (i==numScripts ? '*' : ' '),
183 i, bool2str(scriptInfo[i].details),
184 bool2str(scriptInfo[i].fromSource),
185 bool2str(scriptInfo[i].postponed),
186 bool2str(scriptInfo[i].objLoaded),
187 scriptInfo[i].modName,
188 scriptInfo[i].fromSource ? scriptInfo[i].srcExt : "",
190 scriptInfo[i].lastChange,
194 fflush(stdout);fflush(stderr);
200 /* --------------------------------------------------------------------------
202 * ------------------------------------------------------------------------*/
204 #ifndef NO_MAIN /* we omit main when building the "Hugs server" */
206 Main main Args((Int, String [])); /* now every func has a prototype */
211 #ifdef HAVE_CONSOLE_H /* Macintosh port */
213 _fcreator = 'R*ch'; /* // 'KAHL'; //'*TEX'; //'ttxt'; */
215 console_options.top = 50;
216 console_options.left = 20;
218 console_options.nrows = 32;
219 console_options.ncols = 80;
221 console_options.pause_atexit = 1;
222 console_options.title = "\pHugs";
224 console_options.procID = 5;
225 argc = ccommand(&argv);
228 CStackBase = &argc; /* Save stack base for use in gc */
230 /* If first arg is +Q or -Q, be entirely silent, and automatically run
231 main after loading scripts. Useful for running the nofib suite. */
232 if (argc > 1 && (strcmp(argv[1],"+Q") == 0 || strcmp(argv[1],"-Q")==0)) {
234 if (strcmp(argv[1],"-Q") == 0) {
239 Printf("__ __ __ __ ____ ___ _________________________________________\n");
240 Printf("|| || || || || || ||__ STGHugs: Based on the Haskell 98 standard\n");
241 Printf("||___|| ||__|| ||__|| __|| Copyright (c) 1994-1999\n");
242 Printf("||---|| ___|| World Wide Web: http://haskell.org/hugs\n");
243 Printf("|| || Report bugs to: hugs-bugs@haskell.org\n");
244 Printf("|| || Version: %s _________________________________________\n\n",HUGS_VERSION);
246 /* Get the absolute path to the directory containing the hugs
247 executable, so that we know where the Prelude and nHandle.so/.dll are.
248 We do this by reading env var STGHUGSDIR. This needs to succeed, so
249 setInstallDir won't return unless it succeeds.
251 setInstallDir ( argv[0] );
254 Printf(" Ported to Macintosh by Hans Aberg, compiled " __DATE__ ".\n\n");
257 interpreter(argc,argv);
258 Printf("[Leaving Hugs]\n");
269 /* --------------------------------------------------------------------------
270 * Initialization, interpret command line args and read prelude:
271 * ------------------------------------------------------------------------*/
273 static Void local initialize(argc,argv)/* Interpreter initialization */
278 char argv_0_orig[1000];
280 setLastEdit((String)0,0);
287 hugsEdit = strCopy(fromEnv("EDITOR","c:\\windows\\notepad.exe"));
291 hugsEdit = strCopy(fromEnv("EDITOR",NULL));
293 hugsPath = strCopy(HUGSPATH);
294 readOptions("-p\"%s> \" -r$$");
296 projectPath = strCopy(readRegChildStrings(HKEY_LOCAL_MACHINE,ProjectRoot,
297 "HUGSPATH", PATHSEP, ""));
298 readOptions(readRegString(HKEY_LOCAL_MACHINE,HugsRoot,"Options",""));
299 readOptions(readRegString(HKEY_CURRENT_USER, HugsRoot,"Options",""));
300 #endif /* USE_REGISTRY */
301 readOptions(fromEnv("STGHUGSFLAGS",""));
303 strncpy(argv_0_orig,argv[0],1000); /* startupHaskell mangles argv[0] */
304 startupHaskell (argc,argv);
305 argc = prog_argc; argv = prog_argv;
307 namesUpto = numScripts = 0;
309 for (i=1; i<argc; ++i) { /* process command line arguments */
310 if (strcmp(argv[i], "--")==0) break;
311 if (strcmp(argv[i],"+")==0 && i+1<argc) {
313 ERRMSG(0) "Multiple project filenames on command line"
318 } else if (argv[i] && argv[i][0]/* workaround for /bin/sh silliness*/
319 && !processOption(argv[i])) {
320 addStackEntry(argv[i]);
324 addStackEntry("Prelude");
328 char exe_name[N_INSTALLDIR + 6];
329 strcpy(exe_name, installDir);
330 strcat(exe_name, "hugs");
331 DEBUG_LoadSymbols(exe_name);
337 if (!scriptName[0]) {
338 Printf("Prelude not found on current path: \"%s\"\n",
339 hugsPath ? hugsPath : "");
340 fatal("Unable to load prelude");
345 Printf("Haskell 98 mode: Restart with command line option -98 to enable extensions\n");
347 Printf("Hugs mode: Restart with command line option +98 for Haskell 98 mode\n");
351 Printf("Combined mode: Restart with command line -c for standalone mode\n\n" );
353 Printf("Standalone mode: Restart with command line +c for combined mode\n\n" );
357 evalModule = findText(""); /* evaluate wrt last module by default */
361 "\nUsing project file, ignoring additional filenames\n");
363 loadProject(strCopy(proj));
368 /* --------------------------------------------------------------------------
369 * Command line options:
370 * ------------------------------------------------------------------------*/
372 struct options { /* command line option toggles */
373 char c; /* table defined in main app. */
378 extern struct options toggle[];
380 static Void local toggleSet(c,state) /* Set command line toggle */
384 for (i=0; toggle[i].c; ++i)
385 if (toggle[i].c == c) {
386 *toggle[i].flag = state;
389 ERRMSG(0) "Unknown toggle `%c'", c
393 static Void local togglesIn(state) /* Print current list of toggles in*/
394 Bool state; { /* given state */
397 for (i=0; toggle[i].c; ++i)
398 if (*toggle[i].flag == state && (!haskell98 || toggle[i].h98)) {
400 Putchar((char)(state ? '+' : '-'));
401 Putchar(toggle[i].c);
408 static Void local optionInfo() { /* Print information about command */
409 static String fmts = "%-5s%s\n"; /* line settings */
410 static String fmtc = "%-5c%s\n";
413 Printf("TOGGLES: groups begin with +/- to turn options on/off resp.\n");
414 for (i=0; toggle[i].c; ++i) {
415 if (!haskell98 || toggle[i].h98) {
416 Printf(fmtc,toggle[i].c,toggle[i].description);
420 Printf("\nOTHER OPTIONS: (leading + or - makes no difference)\n");
421 Printf(fmts,"hnum","Set heap size (cannot be changed within Hugs)");
422 Printf(fmts,"pstr","Set prompt string to str");
423 Printf(fmts,"rstr","Set repeat last expression string to str");
424 Printf(fmts,"Pstr","Set search path for modules to str");
425 Printf(fmts,"Estr","Use editor setting given by str");
426 Printf(fmts,"cnum","Set constraint cutoff limit");
427 #if USE_PREPROCESSOR && (defined(HAVE_POPEN) || defined(HAVE__POPEN))
428 Printf(fmts,"Fstr","Set preprocessor filter to str");
431 Printf("\nCurrent settings: ");
434 Printf("-h%d",heapSize);
438 printString(repeatStr);
439 Printf(" -c%d",cutoff);
440 Printf("\nSearch path : -P");
441 printString(hugsPath);
444 if (projectPath!=NULL) {
445 Printf("\nProject Path : %s",projectPath);
448 Printf("\nEditor setting : -E");
449 printString(hugsEdit);
450 #if USE_PREPROCESSOR && (defined(HAVE_POPEN) || defined(HAVE__POPEN))
451 Printf("\nPreprocessor : -F");
452 printString(preprocessor);
454 Printf("\nCompatibility : %s", haskell98 ? "Haskell 98 (+98)"
455 : "Hugs Extensions (-98)");
459 #if USE_REGISTRY || HUGS_FOR_WINDOWS
467 #define PUTInt(optc,i) \
468 sprintf(next,"-%c%d",optc,i); \
471 #define PUTStr(c,s) \
472 next=PUTStr_aux(next,c,s)
474 static String local PUTStr_aux Args((String,Char, String));
476 static String local PUTStr_aux(next,c,s)
482 sprintf(next,"-%c\"",c);
485 PUTS(unlexChar(*t,'"'));
493 static String local optionsToStr() { /* convert options to string */
494 static char buffer[2000];
495 String next = buffer;
498 for (i=0; toggle[i].c; ++i) {
499 PUTC(*toggle[i].flag ? '+' : '-');
503 PUTS(haskell98 ? "+98 " : "-98 ");
504 PUTInt('h',hpSize); PUTC(' ');
506 PUTStr('r',repeatStr);
507 PUTStr('P',hugsPath);
508 PUTStr('E',hugsEdit);
509 PUTInt('c',cutoff); PUTC(' ');
510 #if USE_PREPROCESSOR && (defined(HAVE_POPEN) || defined(HAVE__POPEN))
511 PUTStr('F',preprocessor);
516 #endif /* USE_REGISTRY */
523 static Void local readOptions(options) /* read options from string */
527 stringInput(options);
528 while ((s=readFilename())!=0) {
529 if (*s && !processOption(s)) {
530 ERRMSG(0) "Option string must begin with `+' or `-'"
537 static Bool local processOption(s) /* process string s for options, */
538 String s; { /* return FALSE if none found. */
550 case 'Q' : break; /* already handled */
552 case 'p' : if (s[1]) {
553 if (prompt) free(prompt);
554 prompt = strCopy(s+1);
558 case 'r' : if (s[1]) {
559 if (repeatStr) free(repeatStr);
560 repeatStr = strCopy(s+1);
565 String p = substPath(s+1,hugsPath ? hugsPath : "");
566 if (hugsPath) free(hugsPath);
571 case 'E' : if (hugsEdit) free(hugsEdit);
572 hugsEdit = strCopy(s+1);
575 #if USE_PREPROCESSOR && (defined(HAVE_POPEN) || defined(HAVE__POPEN))
576 case 'F' : if (preprocessor) free(preprocessor);
577 preprocessor = strCopy(s+1);
581 case 'h' : setHeapSize(s+1);
584 case 'c' : if (heapBuilt()) {
586 "You can't enable/disable combined"
587 " operation inside Hugs\n" );
593 case 'D' : /* hack */
595 extern void setRtsFlags( int x );
596 setRtsFlags(argToInt(s+1));
600 default : if (strcmp("98",s)==0) {
601 if (heapBuilt() && ((state && !haskell98) ||
602 (!state && haskell98))) {
604 "Haskell 98 compatibility cannot be changed"
605 " while the interpreter is running\n");
618 static Void local setHeapSize(s)
621 hpSize = argToInt(s);
622 if (hpSize < MINIMUMHEAP)
623 hpSize = MINIMUMHEAP;
624 else if (MAXIMUMHEAP && hpSize > MAXIMUMHEAP)
625 hpSize = MAXIMUMHEAP;
626 if (heapBuilt() && hpSize != heapSize) {
627 /* ToDo: should this use a message box in winhugs? */
629 FPrintf(stderr,"Change to heap size will not take effect until you rerun Hugs\n");
631 FPrintf(stderr,"You cannot change heap size from inside Hugs\n");
639 static Int local argToInt(s) /* read integer from argument str */
644 if (*s=='\0' || !isascii((int)(*s)) || !isdigit((int)(*s))) {
645 ERRMSG(0) "Missing integer in option setting \"%s\"", t
650 Int d = (*s++) - '0';
651 if (n > ((MAXPOSINT - d)/10)) {
652 ERRMSG(0) "Option setting \"%s\" is too large", t
656 } while (isascii((int)(*s)) && isdigit((int)(*s)));
658 if (*s=='K' || *s=='k') {
659 if (n > (MAXPOSINT/1000)) {
660 ERRMSG(0) "Option setting \"%s\" is too large", t
667 #if MAXPOSINT > 1000000 /* waste of time on 16 bit systems */
668 if (*s=='M' || *s=='m') {
669 if (n > (MAXPOSINT/1000000)) {
670 ERRMSG(0) "Option setting \"%s\" is too large", t
678 #if MAXPOSINT > 1000000000
679 if (*s=='G' || *s=='g') {
680 if (n > (MAXPOSINT/1000000000)) {
681 ERRMSG(0) "Option setting \"%s\" is too large", t
690 ERRMSG(0) "Unwanted characters after option setting \"%s\"", t
697 /* --------------------------------------------------------------------------
698 * Print Menu of list of commands:
699 * ------------------------------------------------------------------------*/
701 static struct cmd cmds[] = {
702 {":?", HELP}, {":cd", CHGDIR}, {":also", ALSO},
703 {":type", TYPEOF}, {":!", SYSTEM}, {":load", LOAD},
704 {":reload", RELOAD}, {":gc", COLLECT}, {":edit", EDIT},
705 {":quit", QUIT}, {":set", SET}, {":find", FIND},
706 {":names", NAMES}, {":info", INFO}, {":project", PROJECT},
707 {":dump", DUMP}, {":ztats", STATS},
708 {":module",SETMODULE},
710 #if EXPLAIN_INSTANCE_RESOLUTION
713 {":version", PNTVER},
718 static Void local menu() {
719 Printf("LIST OF COMMANDS: Any command may be abbreviated to :c where\n");
720 Printf("c is the first character in the full name.\n\n");
721 Printf(":load <filenames> load modules from specified files\n");
722 Printf(":load clear all files except prelude\n");
723 Printf(":also <filenames> read additional modules\n");
724 Printf(":reload repeat last load command\n");
725 Printf(":project <filename> use project file\n");
726 Printf(":edit <filename> edit file\n");
727 Printf(":edit edit last module\n");
728 Printf(":module <module> set module for evaluating expressions\n");
729 Printf("<expr> evaluate expression\n");
730 Printf(":type <expr> print type of expression\n");
731 Printf(":? display this list of commands\n");
732 Printf(":set <options> set command line options\n");
733 Printf(":set help on command line options\n");
734 Printf(":names [pat] list names currently in scope\n");
735 Printf(":info <names> describe named objects\n");
736 Printf(":browse <modules> browse names defined in <modules>\n");
737 #if EXPLAIN_INSTANCE_RESOLUTION
738 Printf(":xplain <context> explain instance resolution for <context>\n");
740 Printf(":find <name> edit module containing definition of name\n");
741 Printf(":!command shell escape\n");
742 Printf(":cd dir change directory\n");
743 Printf(":gc force garbage collection\n");
744 Printf(":version print Hugs version\n");
745 Printf(":dump <name> print STG code for named fn\n");
746 #ifdef CRUDE_PROFILING
747 Printf(":ztats <name> print reduction stats\n");
749 Printf(":quit exit Hugs interpreter\n");
752 static Void local guidance() {
753 Printf("Command not recognised. ");
757 static Void local forHelp() {
758 Printf("Type :? for help\n");
761 /* --------------------------------------------------------------------------
762 * Setting of command line options:
763 * ------------------------------------------------------------------------*/
765 struct options toggle[] = { /* List of command line toggles */
766 {'s', 1, "Print no. reductions/cells after eval", &showStats},
767 {'t', 1, "Print type after evaluation", &addType},
768 {'g', 1, "Print no. cells recovered after gc", &gcMessages},
769 {'l', 1, "Literate modules as default", &literateScripts},
770 {'e', 1, "Warn about errors in literate modules", &literateErrors},
771 {'.', 1, "Print dots to show progress", &useDots},
772 {'q', 1, "Print nothing to show progress", &quiet},
773 {'w', 1, "Always show which modules are loaded", &listScripts},
774 {'k', 1, "Show kind errors in full", &kindExpert},
775 {'o', 0, "Allow overlapping instances", &allowOverlap},
779 {'D', 1, "Debug: show generated code", &debugCode},
781 #if EXPLAIN_INSTANCE_RESOLUTION
782 {'x', 1, "Explain instance resolution", &showInstRes},
785 {'m', 0, "Use multi instance resolution", &multiInstRes},
788 {'D', 1, "Debug: show generated G code", &debugCode},
790 {'S', 1, "Debug: show generated SC code", &debugSC},
794 static Void local set() { /* change command line options from*/
795 String s; /* Hugs command line */
797 if ((s=readFilename())!=0) {
799 if (!processOption(s)) {
800 ERRMSG(0) "Option string must begin with `+' or `-'"
803 } while ((s=readFilename())!=0);
805 writeRegString("Options", optionsToStr());
812 /* --------------------------------------------------------------------------
813 * Change directory command:
814 * ------------------------------------------------------------------------*/
816 static Void local changeDir() { /* change directory */
817 String s = readFilename();
819 ERRMSG(0) "Unable to change to directory \"%s\"", s
824 /* --------------------------------------------------------------------------
825 * Loading project and script files:
826 * ------------------------------------------------------------------------*/
828 static Void local loadProject(s) /* Load project file */
832 projInput(currProject);
833 scriptFile = currProject;
834 forgetScriptsFrom(1);
835 while ((s=readFilename())!=0)
838 ERRMSG(0) "Empty project file"
842 projectLoaded = TRUE;
845 static Void local clearProject() { /* clear name for current project */
849 projectLoaded = FALSE;
851 setLastEdit((String)0,0);
857 static Void local makeStackEntry ( ScriptInfo* ent, String iname )
860 Bool sAvail, iAvail, oAvail;
861 Time sTime, iTime, oTime;
862 Long sSize, iSize, oSize;
865 ok = findFilesForModule (
869 &sAvail, &sTime, &sSize,
870 &iAvail, &iTime, &iSize,
871 &oAvail, &oTime, &oSize
875 "Can't find source or object+interface for module \"%s\"",
876 /* "Can't find source for module \"%s\"", */
880 /* findFilesForModule should enforce this */
881 if (!(sAvail || (oAvail && iAvail)))
883 /* Load objects in preference to sources if both are available */
884 /* 11 Oct 99: disable object loading in the interim.
885 Will probably only reinstate when HEP becomes available.
889 ? (oAvail && iAvail && timeEarlier(sTime,oTime))
895 /* ToDo: namesUpto overflow */
896 ent->modName = strCopy(iname);
899 ent->fromSource = !fromObj;
901 ent->postponed = FALSE;
902 ent->lastChange = sTime; /* ToDo: is this right? */
903 ent->size = fromObj ? iSize : sSize;
904 ent->oSize = fromObj ? oSize : 0;
905 ent->objLoaded = FALSE;
910 static Void nukeEnding( String s )
913 if (l > 4 && strncmp(s+l-4,".u_o" ,4)==0) s[l-4] = 0; else
914 if (l > 5 && strncmp(s+l-5,".u_hi",5)==0) s[l-5] = 0; else
915 if (l > 3 && strncmp(s+l-3,".hs" ,3)==0) s[l-3] = 0; else
916 if (l > 4 && strncmp(s+l-4,".lhs" ,4)==0) s[l-4] = 0; else
917 if (l > 4 && strncmp(s+l-4,".dll" ,4)==0) s[l-4] = 0; else
918 if (l > 4 && strncmp(s+l-4,".DLL" ,4)==0) s[l-4] = 0;
921 static Void local addStackEntry(s) /* Add script to list of scripts */
922 String s; { /* to be read in ... */
927 if (namesUpto>=NUM_SCRIPTS) {
928 ERRMSG(0) "Too many module files (maximum of %d allowed)",
935 for (s2 = s; *s2; s2++)
936 if (*s2 == SLASH && *(s2+1)) s = s2+1;
939 for (i = 0; i < namesUpto; i++)
940 if (strcmp(scriptInfo[i].modName,s)==0)
944 makeStackEntry ( &scriptInfo[namesUpto], strCopy(s) );
950 /* Return TRUE if no imports were needed; FALSE otherwise. */
951 static Bool local addScript(stacknum) /* read single file */
953 static char name[FILENAME_MAX+1];
954 Int len = scriptInfo[stacknum].size;
956 #if HUGS_FOR_WINDOWS /* Set clock cursor while loading */
958 SetCursor(LoadCursor(NULL, IDC_WAIT));
961 // setLastEdit(name,0);
964 strcpy(name, scriptInfo[stacknum].path);
965 strcat(name, scriptInfo[stacknum].modName);
966 if (scriptInfo[stacknum].fromSource)
967 strcat(name, scriptInfo[stacknum].srcExt); else
968 strcat(name, ".u_hi");
972 if (scriptInfo[stacknum].fromSource) {
973 if (lastWasObject) finishInterfaces();
974 lastWasObject = FALSE;
975 Printf("Reading script \"%s\":\n",name);
976 needsImports = FALSE;
977 parseScript(name,len);
978 if (needsImports) return FALSE;
983 Printf("Reading iface \"%s\":\n", name);
985 needsImports = FALSE;
987 // set nameObj for the benefit of openGHCIface
988 strcpy(nameObj, scriptInfo[stacknum].path);
989 strcat(nameObj, scriptInfo[stacknum].modName);
990 strcat(nameObj, DLL_ENDING);
991 sizeObj = scriptInfo[stacknum].oSize;
993 loadInterface(name,len);
995 lastWasObject = TRUE;
996 if (needsImports) return FALSE;
1000 preludeLoaded = TRUE;
1005 Bool chase(imps) /* Process list of import requests */
1009 Int origPos = numScripts; /* keep track of original position */
1010 String origName = scriptInfo[origPos].modName;
1011 for (; nonNull(imps); imps=tl(imps)) {
1012 String iname = textToStr(textOf(hd(imps)));
1014 for (; i<namesUpto; i++)
1015 if (strcmp(scriptInfo[i].modName,iname)==0)
1017 //fprintf(stderr, "import name = %s num = %d\n", iname, i );
1020 /* We should have filled in the details of each module
1021 the first time we hear about it.
1023 assert(scriptInfo[i].details);
1026 if (i>=origPos) { /* Neither loaded or queued */
1032 needsImports = TRUE;
1033 if (scriptInfo[origPos].fromSource)
1034 scriptInfo[origPos].postponed = TRUE;
1036 if (i==namesUpto) { /* Name not found (i==namesUpto) */
1037 /* Find out where it lives, whether source or object, etc */
1038 makeStackEntry ( &scriptInfo[i], iname );
1042 if (scriptInfo[i].postponed && scriptInfo[i].fromSource) {
1043 /* Check for recursive dependency */
1045 "Recursive import dependency between \"%s\" and \"%s\"",
1046 scriptInfo[origPos].modName, iname
1049 /* Move stack entry i to somewhere below origPos. If i denotes
1050 * an object, destination is immediately below origPos.
1051 * Otherwise, it's underneath the queue of objects below origPos.
1053 dstPosn = origPos-1;
1054 if (scriptInfo[i].fromSource)
1055 while (!scriptInfo[dstPosn].fromSource && dstPosn > 0)
1059 tmp = scriptInfo[i];
1060 for (; i > dstPosn; i--) scriptInfo[i] = scriptInfo[i-1];
1061 scriptInfo[dstPosn] = tmp;
1062 if (dstPosn < nextNumScripts) nextNumScripts = dstPosn;
1066 return needsImports;
1069 static Void local forgetScriptsFrom(scno)/* remove scripts from system */
1073 for (i=scno; i<namesUpto; ++i)
1075 free(scriptName[i]);
1077 dropScriptsFrom(scno-1);
1079 if (numScripts>namesUpto)
1083 /* --------------------------------------------------------------------------
1084 * Commands for loading and removing script files:
1085 * ------------------------------------------------------------------------*/
1087 static Void local load() { /* read filenames from command line */
1088 String s; /* and add to list of scripts waiting */
1090 while ((s=readFilename())!=0)
1095 static Void local project() { /* read list of script names from */
1096 String s; /* project file */
1098 if ((s=readFilename()) || currProject) {
1100 s = strCopy(currProject);
1101 else if (readFilename()) {
1102 ERRMSG(0) "Too many project files"
1109 ERRMSG(0) "No project filename specified"
1116 static Void local readScripts(n) /* Reread current list of scripts, */
1117 Int n; { /* loading everything after and */
1118 Time timeStamp; /* including the first script which*/
1119 Long fileSize; /* has been either changed or added*/
1120 static char name[FILENAME_MAX+1];
1122 lastWasObject = FALSE;
1123 ppSmStack("readscripts-begin");
1124 #if HUGS_FOR_WINDOWS
1125 SetCursor(LoadCursor(NULL, IDC_WAIT));
1129 for (; n<numScripts; n++) { /* Scan previously loaded scripts */
1130 ppSmStack("readscripts-loop1");
1131 getFileInfo(scriptName[n], &timeStamp, &fileSize);
1132 if (timeChanged(timeStamp,lastChange[n])) {
1133 dropScriptsFrom(n-1);
1138 for (; n<NUM_SCRIPTS; n++) /* No scripts have been postponed */
1139 postponed[n] = FALSE; /* at this stage */
1142 while (numScripts<namesUpto) { /* Process any remaining scripts */
1143 ppSmStack("readscripts-loop2");
1144 getFileInfo(scriptName[numScripts], &timeStamp, &fileSize);
1145 timeSet(lastChange[numScripts],timeStamp);
1146 if (numScripts>0) /* no new script for prelude */
1147 startNewScript(scriptName[numScripts]);
1148 if (addScript(scriptName[numScripts],fileSize))
1151 dropScriptsFrom(numScripts-1);
1157 for (; n<numScripts; n++) {
1158 ppSmStack("readscripts-loop2");
1159 strcpy(name, scriptInfo[n].path);
1160 strcat(name, scriptInfo[n].modName);
1161 if (scriptInfo[n].fromSource)
1162 strcat(name, scriptInfo[n].srcExt); else
1163 strcat(name, ".u_hi"); //ToDo: should be .o
1164 getFileInfo(name,&timeStamp, &fileSize);
1165 if (timeChanged(timeStamp,scriptInfo[n].lastChange)) {
1166 dropScriptsFrom(n-1);
1171 for (; n<NUM_SCRIPTS; n++)
1172 scriptInfo[n].postponed = FALSE;
1176 while (numScripts < namesUpto) {
1177 ppSmStack ( "readscripts-loop2" );
1179 if (scriptInfo[numScripts].fromSource) {
1182 startNewScript(scriptInfo[numScripts].modName);
1183 nextNumScripts = NUM_SCRIPTS; //bogus initialisation
1184 if (addScript(numScripts)) {
1186 assert(nextNumScripts==NUM_SCRIPTS);
1189 dropScriptsFrom(numScripts-1);
1193 if (scriptInfo[numScripts].objLoaded) {
1196 scriptInfo[numScripts].objLoaded = TRUE;
1199 startNewScript(scriptInfo[numScripts].modName);
1201 nextNumScripts = NUM_SCRIPTS;
1202 if (addScript(numScripts)) {
1204 assert(nextNumScripts==NUM_SCRIPTS);
1206 //while (!scriptInfo[numScripts].fromSource && numScripts > 0)
1208 //if (scriptInfo[numScripts].fromSource)
1210 numScripts = nextNumScripts;
1211 assert(nextNumScripts<NUM_SCRIPTS);
1215 if (numScripts==namesUpto) ppSmStack( "readscripts-final") ;
1220 { Int m = namesUpto-1;
1221 Text mtext = findText(scriptInfo[m].modName);
1222 /* Commented out till we understand what
1223 * this is trying to do.
1224 * Problem, you cant find a module till later.
1227 setCurrModule(findModule(mtext));
1237 setLastEdit((String)0, 0);
1238 ppSmStack("readscripts-end ");
1241 static Void local whatScripts() { /* list scripts in current session */
1243 Printf("\nHugs session for:");
1245 Printf(" (project: %s)",currProject);
1246 for (i=0; i<numScripts; ++i)
1247 Printf("\n%s%s",scriptInfo[i].path, scriptInfo[i].modName);
1251 /* --------------------------------------------------------------------------
1252 * Access to external editor:
1253 * ------------------------------------------------------------------------*/
1255 static Void local editor() { /* interpreter-editor interface */
1256 String newFile = readFilename();
1258 setLastEdit(newFile,0);
1259 if (readFilename()) {
1260 ERRMSG(0) "Multiple filenames not permitted"
1267 static Void local find() { /* edit file containing definition */
1269 This just plain wont work no more.
1271 String nm = readFilename(); /* of specified name */
1273 ERRMSG(0) "No name specified"
1276 else if (readFilename()) {
1277 ERRMSG(0) "Multiple names not permitted"
1283 setCurrModule(findEvalModule());
1285 if (nonNull(c=findTycon(t=findText(nm)))) {
1286 if (startEdit(tycon(c).line,scriptName[scriptThisTycon(c)])) {
1289 } else if (nonNull(c=findName(t))) {
1290 if (startEdit(name(c).line,scriptName[scriptThisName(c)])) {
1294 ERRMSG(0) "No current definition for name \"%s\"", nm
1301 static Void local runEditor() { /* run editor on script lastEdit */
1302 if (startEdit(lastEdLine,lastEdit)) /* at line lastEdLine */
1306 static Void local setLastEdit(fname,line)/* keep name of last file to edit */
1311 lastEdit = strCopy(fname);
1313 #if HUGS_FOR_WINDOWS
1314 DrawStatusLine(hWndMain); /* Redo status line */
1318 /* --------------------------------------------------------------------------
1319 * Read and evaluate an expression:
1320 * ------------------------------------------------------------------------*/
1322 static Void local setModule(){/*set module in which to evaluate expressions*/
1323 String s = readFilename();
1324 if (!s) s = ""; /* :m clears the current module selection */
1325 evalModule = findText(s);
1326 setLastEdit(fileOfModule(findEvalModule()),0);
1329 static Module local findEvalModule() { /*Module in which to eval expressions*/
1330 Module m = findModule(evalModule);
1336 static Void local evaluator() { /* evaluate expr and print value */
1340 setCurrModule(findEvalModule());
1342 startNewScript(0); /* Enables recovery of storage */
1343 /* allocated during evaluation */
1346 defaultDefns = evalDefaults;
1347 type = typeCheckExp(TRUE);
1348 if (isPolyType(type)) {
1349 ks = polySigOf(type);
1350 bd = monotypeOf(type);
1355 if (whatIs(bd)==QUAL) {
1356 ERRMSG(0) "Unresolved overloading" ETHEN
1357 ERRTEXT "\n*** Type : " ETHEN ERRTYPE(type);
1358 ERRTEXT "\n*** Expression : " ETHEN ERREXPR(inputExpr);
1368 if (isProgType(ks,bd)) {
1369 inputExpr = ap(nameRunIO,inputExpr);
1373 Cell d = provePred(ks,NIL,ap(classShow,bd));
1375 ERRMSG(0) "Cannot find \"show\" function for:" ETHEN
1376 ERRTEXT "\n*** expression : " ETHEN ERREXPR(inputExpr);
1377 ERRTEXT "\n*** of type : " ETHEN ERRTYPE(type);
1381 inputExpr = ap2(findName(findText("show")),d,inputExpr);
1382 inputExpr = ap(findName(findText("putStr")), inputExpr);
1383 inputExpr = ap(nameRunIO, inputExpr);
1385 evalExp(); printf("\n");
1388 printType(stdout,type);
1395 printf ( "result type is " );
1396 printType ( stdout, type );
1405 static Void local stopAnyPrinting() { /* terminate printing of expression,*/
1406 if (printing) { /* after successful termination or */
1407 printing = FALSE; /* runtime error (e.g. interrupt) */
1410 #define plural(v) v, (v==1?"":"s")
1411 Printf("%lu cell%s",plural(numCells));
1413 Printf(", %u garbage collection%s",plural(numGcs));
1422 /* --------------------------------------------------------------------------
1423 * Print type of input expression:
1424 * ------------------------------------------------------------------------*/
1426 static Void local showtype() { /* print type of expression (if any)*/
1429 setCurrModule(findEvalModule());
1430 startNewScript(0); /* Enables recovery of storage */
1431 /* allocated during evaluation */
1434 defaultDefns = evalDefaults;
1435 type = typeCheckExp(FALSE);
1436 printExp(stdout,inputExpr);
1438 printType(stdout,type);
1443 static Void local browseit(mod,t,all)
1450 Printf("module %s where\n",textToStr(module(mod).text));
1451 for (cs = module(mod).names; nonNull(cs); cs=tl(cs)) {
1453 /* only look at things defined in this module,
1454 unless `all' flag is set */
1455 if (all || name(nm).mod == mod) {
1456 /* unwanted artifacts, like lambda lifted values,
1457 are in the list of names, but have no types */
1458 if (nonNull(name(nm).type)) {
1459 printExp(stdout,nm);
1461 printType(stdout,name(nm).type);
1463 Printf(" -- data constructor");
1464 } else if (isMfun(nm)) {
1465 Printf(" -- class member");
1466 } else if (isSfun(nm)) {
1467 Printf(" -- selector function");
1475 Printf("Unknown module %s\n",t);
1480 static Void local browse() { /* browse modules */
1481 Int count = 0; /* or give menu of commands */
1485 setCurrModule(findEvalModule());
1486 startNewScript(0); /* for recovery of storage */
1487 for (; (s=readFilename())!=0; count++)
1488 if (strcmp(s,"all") == 0) {
1492 browseit(findModule(findText(s)),s,all);
1494 browseit(findEvalModule(),NULL,all);
1498 #if EXPLAIN_INSTANCE_RESOLUTION
1499 static Void local xplain() { /* print type of expression (if any)*/
1501 Bool sir = showInstRes;
1503 setCurrModule(findEvalModule());
1504 startNewScript(0); /* Enables recovery of storage */
1505 /* allocated during evaluation */
1509 d = provePred(NIL,NIL,hd(inputContext));
1511 fprintf(stdout, "not Sat\n");
1513 fprintf(stdout, "Sat\n");
1519 /* --------------------------------------------------------------------------
1520 * Enhanced help system: print current list of scripts or give information
1522 * ------------------------------------------------------------------------*/
1524 static String local objToStr(m,c)
1527 #if 1 || DISPLAY_QUANTIFIERS
1528 static char newVar[60];
1529 switch (whatIs(c)) {
1530 case NAME : if (m == name(c).mod) {
1531 sprintf(newVar,"%s", textToStr(name(c).text));
1533 sprintf(newVar,"%s.%s",
1534 textToStr(module(name(c).mod).text),
1535 textToStr(name(c).text));
1539 case TYCON : if (m == tycon(c).mod) {
1540 sprintf(newVar,"%s", textToStr(tycon(c).text));
1542 sprintf(newVar,"%s.%s",
1543 textToStr(module(tycon(c).mod).text),
1544 textToStr(tycon(c).text));
1548 case CLASS : if (m == cclass(c).mod) {
1549 sprintf(newVar,"%s", textToStr(cclass(c).text));
1551 sprintf(newVar,"%s.%s",
1552 textToStr(module(cclass(c).mod).text),
1553 textToStr(cclass(c).text));
1557 default : internal("objToStr");
1561 static char newVar[33];
1562 switch (whatIs(c)) {
1563 case NAME : sprintf(newVar,"%s", textToStr(name(c).text));
1566 case TYCON : sprintf(newVar,"%s", textToStr(tycon(c).text));
1569 case CLASS : sprintf(newVar,"%s", textToStr(cclass(c).text));
1572 default : internal("objToStr");
1580 static Void local dumpStg( void ) { /* print STG stuff */
1585 Cell v; /* really StgVar */
1586 setCurrModule(findEvalModule());
1588 for (; (s=readFilename())!=0;) {
1591 /* find the name while ignoring module scopes */
1592 for (i=NAMEMIN; i<nameHw; i++)
1593 if (name(i).text == t) n = i;
1595 /* perhaps it's an "idNNNNNN" thing? */
1598 s[0]=='i' && s[1]=='d' && isdigit(s[2])) {
1601 while (isdigit(s[i])) {
1602 v = v * 10 + (s[i]-'0');
1606 n = nameFromStgVar(v);
1609 if (isNull(n) && whatIs(v)==STGVAR) {
1610 Printf ( "\n{- `%s' has no nametable entry -}\n", s );
1611 printStg(stderr, v );
1614 Printf ( "Unknown reference `%s'\n", s );
1617 Printf ( "Not a Name: `%s'\n", s );
1619 if (isNull(name(n).stgVar)) {
1620 Printf ( "Doesn't have a STG tree: %s\n", s );
1622 Printf ( "\n{- stgVar of `%s' is id%d -}\n", s, -name(n).stgVar);
1623 printStg(stderr, name(n).stgVar);
1628 static Void local info() { /* describe objects */
1629 Int count = 0; /* or give menu of commands */
1632 setCurrModule(findEvalModule());
1633 startNewScript(0); /* for recovery of storage */
1634 for (; (s=readFilename())!=0; count++) {
1635 describe(findText(s));
1643 static Void local describe(t) /* describe an object */
1645 Tycon tc = findTycon(t);
1646 Class cl = findClass(t);
1647 Name nm = findName(t);
1649 if (nonNull(tc)) { /* as a type constructor */
1653 for (i=0; i<tycon(tc).arity; ++i) {
1654 t = ap(t,mkOffset(i));
1656 Printf("-- type constructor");
1658 Printf(" with kind ");
1659 printKind(stdout,tycon(tc).kind);
1662 switch (tycon(tc).what) {
1663 case SYNONYM : Printf("type ");
1664 printType(stdout,t);
1666 printType(stdout,tycon(tc).defn);
1670 case DATATYPE : { List cs = tycon(tc).defn;
1671 if (tycon(tc).what==DATATYPE) {
1676 printType(stdout,t);
1678 mapProc(printSyntax,cs);
1680 Printf("\n-- constructors:");
1682 for (; hasCfun(cs); cs=tl(cs)) {
1684 printExp(stdout,hd(cs));
1686 printType(stdout,name(hd(cs)).type);
1689 Printf("\n-- selectors:");
1691 for (; nonNull(cs); cs=tl(cs)) {
1693 printExp(stdout,hd(cs));
1695 printType(stdout,name(hd(cs)).type);
1700 case RESTRICTSYN : Printf("type ");
1701 printType(stdout,t);
1702 Printf(" = <restricted>");
1706 if (nonNull(in=findFirstInst(tc))) {
1707 Printf("\n-- instances:\n");
1710 in = findNextInst(tc,in);
1711 } while (nonNull(in));
1716 if (nonNull(cl)) { /* as a class */
1717 List ins = cclass(cl).instances;
1718 Kinds ks = cclass(cl).kinds;
1719 if (nonNull(ks) && isNull(tl(ks)) && hd(ks)==STAR) {
1720 Printf("-- type class");
1722 Printf("-- constructor class");
1724 Printf(" with arity ");
1725 printKinds(stdout,ks);
1729 mapProc(printSyntax,cclass(cl).members);
1731 if (nonNull(cclass(cl).supers)) {
1732 printContext(stdout,cclass(cl).supers);
1735 printPred(stdout,cclass(cl).head);
1737 if (nonNull(cclass(cl).fds)) {
1738 List fds = cclass(cl).fds;
1740 for (; nonNull(fds); fds=tl(fds)) {
1742 printFD(stdout,hd(fds));
1747 if (nonNull(cclass(cl).members)) {
1748 List ms = cclass(cl).members;
1751 Type t = name(hd(ms)).type;
1752 if (isPolyType(t)) {
1756 printExp(stdout,hd(ms));
1758 if (isNull(tl(fst(snd(t))))) {
1761 t = ap(QUAL,pair(tl(fst(snd(t))),snd(snd(t))));
1763 printType(stdout,t);
1765 } while (nonNull(ms));
1769 Printf("\n-- instances:\n");
1773 } while (nonNull(ins));
1778 if (nonNull(nm)) { /* as a function/name */
1780 printExp(stdout,nm);
1782 if (nonNull(name(nm).type)) {
1783 printType(stdout,name(nm).type);
1785 Printf("<unknown type>");
1789 Printf(" -- data constructor");
1790 } else if (isMfun(nm)) {
1791 Printf(" -- class member");
1792 } else if (isSfun(nm)) {
1793 Printf(" -- selector function");
1799 if (isNull(tc) && isNull(cl) && isNull(nm)) {
1800 Printf("Unknown reference `%s'\n",textToStr(t));
1804 static Void local printSyntax(nm)
1806 Syntax sy = syntaxOf(nm);
1807 Text t = name(nm).text;
1808 String s = textToStr(t);
1809 if (sy != defaultSyntax(t)) {
1811 switch (assocOf(sy)) {
1812 case LEFT_ASS : Putchar('l'); break;
1813 case RIGHT_ASS : Putchar('r'); break;
1814 case NON_ASS : break;
1816 Printf(" %i ",precOf(sy));
1817 if (isascii((int)(*s)) && isalpha((int)(*s))) {
1826 static Void local showInst(in) /* Display instance decl header */
1828 Printf("instance ");
1829 if (nonNull(inst(in).specifics)) {
1830 printContext(stdout,inst(in).specifics);
1833 printPred(stdout,inst(in).head);
1837 /* --------------------------------------------------------------------------
1838 * List all names currently in scope:
1839 * ------------------------------------------------------------------------*/
1841 static Void local listNames() { /* list names matching optional pat*/
1842 String pat = readFilename();
1844 Int width = getTerminalWidth() - 1;
1847 Module mod = findEvalModule();
1849 if (pat) { /* First gather names to list */
1851 names = addNamesMatching(pat,names);
1852 } while ((pat=readFilename())!=0);
1854 names = addNamesMatching((String)0,names);
1856 if (isNull(names)) { /* Then print them out */
1857 ERRMSG(0) "No names selected"
1860 for (termPos=0; nonNull(names); names=tl(names)) {
1861 String s = objToStr(mod,hd(names));
1863 if (termPos+1+l>width) {
1866 } else if (termPos>0) {
1874 Printf("\n(%d names listed)\n", count);
1877 /* --------------------------------------------------------------------------
1878 * print a prompt and read a line of input:
1879 * ------------------------------------------------------------------------*/
1881 static Void local promptForInput(moduleName)
1882 String moduleName; {
1883 char promptBuffer[1000];
1885 /* This is portable but could overflow buffer */
1886 sprintf(promptBuffer,prompt,moduleName);
1888 /* Works on ANSI C - but pre-ANSI compilers return a pointer to
1889 * promptBuffer instead.
1891 if (sprintf(promptBuffer,prompt,moduleName) >= 1000) {
1892 /* Reset prompt to a safe default to avoid an infinite loop */
1894 prompt = strCopy("? ");
1895 internal("Combined prompt and evaluation module name too long");
1899 stringInput("main\0"); else
1900 consoleInput(promptBuffer);
1903 /* --------------------------------------------------------------------------
1904 * main read-eval-print loop, with error trapping:
1905 * ------------------------------------------------------------------------*/
1907 static jmp_buf catch_error; /* jump buffer for error trapping */
1909 static Void local interpreter(argc,argv)/* main interpreter loop */
1912 Int errorNumber = setjmp(catch_error);
1914 if (errorNumber && autoMain) {
1915 fprintf(stderr, "hugs +Q: compilation failed -- can't run `main'\n" );
1919 breakOn(TRUE); /* enable break trapping */
1920 if (numScripts==0) { /* only succeeds on first time, */
1921 if (errorNumber) /* before prelude has been loaded */
1922 fatal("Unable to load prelude");
1923 initialize(argc,argv);
1927 /* initialize calls startupHaskell, which trashes our signal handlers */
1932 everybody(RESET); /* reset to sensible initial state */
1933 dropScriptsFrom(numScripts-1); /* remove partially loaded scripts */
1934 /* not counting prelude as a script*/
1936 promptForInput(textToStr(module(findEvalModule()).text));
1938 cmd = readCommand(cmds, (Char)':', (Char)'!');
1943 case EDIT : editor();
1947 case LOAD : clearProject();
1948 forgetScriptsFrom(1);
1951 case ALSO : clearProject();
1952 forgetScriptsFrom(numScripts);
1955 case RELOAD : readScripts(1);
1957 case PROJECT: project();
1962 case EVAL : evaluator();
1964 case TYPEOF : showtype();
1966 case BROWSE : browse();
1968 #if EXPLAIN_INSTANCE_RESOLUTION
1969 case XPLAIN : xplain();
1972 case NAMES : listNames();
1976 case BADCMD : guidance();
1981 #ifdef CRUDE_PROFILING
1985 case SYSTEM : if (shellEsc(readLine()))
1986 Printf("Warning: Shell escape terminated abnormally\n");
1988 case CHGDIR : changeDir();
1992 case PNTVER: Printf("-- Hugs Version %s\n",
1995 case DUMP : dumpStg();
1998 case COLLECT: consGC = FALSE;
2001 Printf("Garbage collection recovered %d cells\n",
2008 Printf("Elapsed time (ms): %ld (user), %ld (system)\n",
2009 millisecs(userElapsed), millisecs(systElapsed));
2011 if (autoMain) break;
2016 /* --------------------------------------------------------------------------
2017 * Display progress towards goal:
2018 * ------------------------------------------------------------------------*/
2020 static Target currTarget;
2021 static Bool aiming = FALSE;
2024 static Int charCount;
2026 Void setGoal(what, t) /* Set goal for what to be t */
2031 #if EXPLAIN_INSTANCE_RESOLUTION
2035 currTarget = (t?t:1);
2038 currPos = strlen(what);
2039 maxPos = getTerminalWidth() - 1;
2043 for (charCount=0; *what; charCount++)
2048 Void soFar(t) /* Indicate progress towards goal */
2049 Target t; { /* has now reached t */
2052 #if EXPLAIN_INSTANCE_RESOLUTION
2057 Int newPos = (Int)((maxPos * ((long)t))/currTarget);
2062 if (newPos>currPos) {
2065 while (newPos>++currPos);
2072 Void done() { /* Goal has now been achieved */
2075 #if EXPLAIN_INSTANCE_RESOLUTION
2080 while (maxPos>currPos++)
2085 for (; charCount>0; charCount--) {
2094 static Void local failed() { /* Goal cannot be reached due to */
2095 if (aiming) { /* errors */
2102 /* --------------------------------------------------------------------------
2104 * ------------------------------------------------------------------------*/
2106 Void errHead(l) /* print start of error message */
2108 failed(); /* failed to reach target ... */
2110 FPrintf(errorStream,"ERROR");
2113 FPrintf(errorStream," \"%s\"", scriptFile);
2114 setLastEdit(scriptFile,l);
2115 if (l) FPrintf(errorStream," (line %d)",l);
2118 FPrintf(errorStream,": ");
2119 FFlush(errorStream);
2122 Void errFail() { /* terminate error message and */
2123 Putc('\n',errorStream); /* produce exception to return to */
2124 FFlush(errorStream); /* main command loop */
2125 longjmp(catch_error,1);
2128 Void errAbort() { /* altern. form of error handling */
2129 failed(); /* used when suitable error message*/
2130 stopAnyPrinting(); /* has already been printed */
2134 Void internal(msg) /* handle internal error */
2136 #if HUGS_FOR_WINDOWS
2138 wsprintf(buf,"INTERNAL ERROR: %s",msg);
2139 MessageBox(hWndMain, buf, appName, MB_ICONHAND | MB_OK);
2143 Printf("INTERNAL ERROR: %s\n",msg);
2145 longjmp(catch_error,1);
2148 Void fatal(msg) /* handle fatal error */
2150 #if HUGS_FOR_WINDOWS
2152 wsprintf(buf,"FATAL ERROR: %s",msg);
2153 MessageBox(hWndMain, buf, appName, MB_ICONHAND | MB_OK);
2156 Printf("\nFATAL ERROR: %s\n",msg);
2161 sigHandler(breakHandler) { /* respond to break interrupt */
2162 #if HUGS_FOR_WINDOWS
2163 MessageBox(GetFocus(), "Interrupted!", appName, MB_ICONSTOP | MB_OK);
2166 Printf("{Interrupted!}\n");
2168 breakOn(TRUE); /* reinstall signal handler - redundant on BSD systems */
2169 /* but essential on POSIX (and other?) systems */
2175 longjmp(catch_error,1);
2176 sigResume;/*NOTREACHED*/
2179 /* --------------------------------------------------------------------------
2180 * Read value from environment variable or registry:
2181 * ------------------------------------------------------------------------*/
2183 String fromEnv(var,def) /* return value of: */
2184 String var; /* environment variable named by var */
2185 String def; { /* or: default value given by def */
2186 String s = getenv(var);
2187 return (s ? s : def);
2190 /* --------------------------------------------------------------------------
2191 * String manipulation routines:
2192 * ------------------------------------------------------------------------*/
2194 static String local strCopy(s) /* make malloced copy of a string */
2198 if ((t=(char *)malloc(strlen(s)+1))==0) {
2199 ERRMSG(0) "String storage space exhausted"
2202 for (r=t; (*r++ = *s++)!=0; ) {
2209 /* --------------------------------------------------------------------------
2211 * We can redirect compiler output (prompts, error messages, etc) by
2212 * tweaking these functions.
2213 * ------------------------------------------------------------------------*/
2215 #if REDIRECT_OUTPUT && !HUGS_FOR_WINDOWS
2217 #ifdef HAVE_STDARG_H
2220 #include <varargs.h>
2223 /* ----------------------------------------------------------------------- */
2225 #define BufferSize 10000 /* size of redirected output buffer */
2227 typedef struct _HugsStream {
2228 char buffer[BufferSize]; /* buffer for redirected output */
2229 Int next; /* next space in buffer */
2232 static Void local vBufferedPrintf Args((HugsStream*, const char*, va_list));
2233 static Void local bufferedPutchar Args((HugsStream*, Char));
2234 static String local bufferClear Args((HugsStream *stream));
2236 static Void local vBufferedPrintf(stream, fmt, ap)
2240 Int spaceLeft = BufferSize - stream->next;
2241 char* p = &stream->buffer[stream->next];
2242 Int charsAdded = vsnprintf(p, spaceLeft, fmt, ap);
2243 if (0 <= charsAdded && charsAdded < spaceLeft)
2244 stream->next += charsAdded;
2245 #if 1 /* we can either buffer the first n chars or buffer the last n chars */
2251 static Void local bufferedPutchar(stream, c)
2254 if (BufferSize - stream->next >= 2) {
2255 stream->buffer[stream->next++] = c;
2256 stream->buffer[stream->next] = '\0';
2260 static String local bufferClear(stream)
2261 HugsStream *stream; {
2262 if (stream->next == 0) {
2266 return stream->buffer;
2270 /* ----------------------------------------------------------------------- */
2272 static HugsStream outputStreamH;
2274 * We rely on standard C semantics to initialise outputStreamH.next to 0.
2277 Void hugsEnableOutput(f)
2282 String hugsClearOutputBuffer() {
2283 return bufferClear(&outputStreamH);
2286 #ifdef HAVE_STDARG_H
2287 Void hugsPrintf(const char *fmt, ...) {
2288 va_list ap; /* pointer into argument list */
2289 va_start(ap, fmt); /* make ap point to first arg after fmt */
2290 if (!disableOutput) {
2293 vBufferedPrintf(&outputStreamH, fmt, ap);
2295 va_end(ap); /* clean up */
2298 Void hugsPrintf(fmt, va_alist)
2301 va_list ap; /* pointer into argument list */
2302 va_start(ap); /* make ap point to first arg after fmt */
2303 if (!disableOutput) {
2306 vBufferedPrintf(&outputStreamH, fmt, ap);
2308 va_end(ap); /* clean up */
2314 if (!disableOutput) {
2317 bufferedPutchar(&outputStreamH, c);
2321 Void hugsFlushStdout() {
2322 if (!disableOutput) {
2329 if (!disableOutput) {
2334 #ifdef HAVE_STDARG_H
2335 Void hugsFPrintf(FILE *fp, const char* fmt, ...) {
2338 if (!disableOutput) {
2339 vfprintf(fp, fmt, ap);
2341 vBufferedPrintf(&outputStreamH, fmt, ap);
2346 Void hugsFPrintf(FILE *fp, const char* fmt, va_list)
2352 if (!disableOutput) {
2353 vfprintf(fp, fmt, ap);
2355 vBufferedPrintf(&outputStreamH, fmt, ap);
2361 Void hugsPutc(c, fp)
2364 if (!disableOutput) {
2367 bufferedPutchar(&outputStreamH, c);
2371 #endif /* REDIRECT_OUTPUT && !HUGS_FOR_WINDOWS */
2372 /* --------------------------------------------------------------------------
2373 * Send message to each component of system:
2374 * ------------------------------------------------------------------------*/
2376 Void everybody(what) /* send command `what' to each component of*/
2377 Int what; { /* system to respond as appropriate ... */
2378 machdep(what); /* The order of calling each component is */
2379 storage(what); /* important for the INSTALL command */
2382 translateControl(what);
2384 staticAnalysis(what);
2385 deriveControl(what);
2391 /* --------------------------------------------------------------------------
2392 * Hugs for Windows code (WinMain and related functions)
2393 * ------------------------------------------------------------------------*/
2395 #if HUGS_FOR_WINDOWS
2396 #include "winhugs.c"