/* Scheme In One Defun, but in C this time. * COPYRIGHT (c) 1988-1997 BY * * PARADIGM ASSOCIATES INCORPORATED, CAMBRIDGE, MASSACHUSETTS. * * ALL RIGHTS RESERVED * Permission to use, copy, modify, distribute and sell this software and its documentation for any purpose and without fee is hereby granted, provided that the above copyright notice appear in all copies and that both that copyright notice and this permission notice appear in supporting documentation, and that the name of Paradigm Associates Inc not be used in advertising or publicity pertaining to distribution of the software without specific, written prior permission. PARADIGM DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL PARADIGM BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ /* gjc@world.std.com Release 1.0: 24-APR-88 Release 1.1: 25-APR-88, added: macros, predicates, load. With additions by Barak.Pearlmutter@DOGHEN.BOLTZ.CS.CMU.EDU: Full flonum recognizer, cleaned up uses of NULL/0. Now distributed with siod.scm. Release 1.2: 28-APR-88, name changes as requested by JAR@AI.AI.MIT.EDU, plus some bug fixes. Release 1.3: 1-MAY-88, changed env to use frames instead of alist. define now works properly. vms specific function edit. Release 1.4 20-NOV-89. Minor Cleanup and remodularization. Now in 3 files, siod.h, slib.c, siod.c. Makes it easier to write your own main loops. Some short-int changes for lightspeed C included. Release 1.5 29-NOV-89. Added startup flag -g, select stop and copy or mark-and-sweep garbage collection, which assumes that the stack/register marking code is correct for your architecture. Release 2.0 1-DEC-89. Added repl_hooks, Catch, Throw. This is significantly different enough (from 1.3) now that I'm calling it a major release. Release 2.1 4-DEC-89. Small reader features, dot, backquote, comma. Release 2.2 5-DEC-89. gc,read,print,eval, hooks for user defined datatypes. Release 2.3 6-DEC-89. save_forms, obarray intern mechanism. comment char. Release 2.3a......... minor speed-ups. i/o interrupt considerations. Release 2.4 27-APR-90 gen_readr, for read-from-string. Release 2.5 18-SEP-90 arrays added to SIOD.C by popular demand. inums. Release 2.6 11-MAR-92 function prototypes, some remodularization. Release 2.7 20-MAR-92 hash tables, fasload. Stack check. Release 2.8 3-APR-92 Bug fixes, \n syntax in string reading. Release 2.9 28-AUG-92 gc sweep bug fix. fseek, ftell, etc. Change to envlookup to allow (a . rest) suggested by bowles@is.s.u-tokyo.ac.jp. Release 2.9a 10-AUG-93. Minor changes for Windows NT. Release 3.0 1-MAY-94. Release it, include changes/cleanup recommended by andreasg@nynexst.com for the OS2 C++ compiler. Compilation and running tested using DEC C, VAX C. WINDOWS NT. GNU C on SPARC. Storage management improvements, more string functions. SQL support. Release 3.1? -JUN-95 verbose flag, other integration improvements for htqs.c hpux by denson@sdd.hp.com, solaris by pgw9@columbia.edu. Release 3.2X MAR-96. dynamic linking, subr closures, other improvements. Release 3.2 12-JUN-96. Bug fixes. Call it a release. Release 3.3x cleanup for gcc -Wall. Release 3.4 win95 cleanup. Release 3.5 5-MAY-97 fixes, plus win95 "compiler" to create exe files. */ #ifdef HAVE_CONFIG_H # include "config.h" #endif #include #include #include #include #include #include #include #include #include #ifdef HPUX # define _INCLUDE_POSIX_SOURCE # include #endif #include "siod.h" #include "siodp.h" static void init_slib_version(void) {setvar(cintern("*slib-version*"), cintern("$Id: slib.c,v 1.1.1.1 2000/12/09 01:57:11 thhsieh Exp $"), NIL);} char * __stdcall siod_version(void) {return("3.5 5-MAY-97");} long nheaps = 2; LISP *heaps; LISP heap,heap_end,heap_org; long heap_size = 5000; long old_heap_used; long gc_status_flag = 1; char *init_file = (char *) NULL; char *tkbuffer = NULL; long gc_kind_copying = 0; long gc_cells_allocated = 0; double gc_time_taken; LISP *stack_start_ptr = NULL; LISP freelist; jmp_buf errjmp; long errjmp_ok = 0; long nointerrupt = 1; long interrupt_differed = 0; LISP oblistvar = NIL; LISP sym_t = NIL; LISP eof_val = NIL; LISP sym_errobj = NIL; LISP sym_catchall = NIL; LISP sym_progn = NIL; LISP sym_lambda = NIL; LISP sym_quote = NIL; LISP sym_dot = NIL; LISP sym_after_gc = NIL; LISP sym_eval_history_ptr = NIL; LISP unbound_marker = NIL; LISP *obarray; long obarray_dim = 100; struct catch_frame *catch_framep = (struct catch_frame *) NULL; void (*repl_puts)(char *) = NULL; LISP (*repl_read)(void) = NULL; LISP (*repl_eval)(LISP) = NULL; void (*repl_print)(LISP) = NULL; LISP *inums; long inums_dim = 256; struct user_type_hooks *user_types = NULL; long user_tc_next = tc_user_min; struct gc_protected *protected_registers = NULL; jmp_buf save_regs_gc_mark; double gc_rt; long gc_cells_collected; char *user_ch_readm = ""; char *user_te_readm = ""; LISP (*user_readm)(int, struct gen_readio *) = NULL; LISP (*user_readt)(char *,long, int *) = NULL; void (*fatal_exit_hook)(void) = NULL; #ifdef THINK_C int ipoll_counter = 0; #endif char *stack_limit_ptr = NULL; long stack_size = #ifdef THINK_C 10000; #else 50000; #endif long siod_verbose_level = 4; #ifndef SIOD_LIB_DEFAULT #ifdef unix #define SIOD_LIB_DEFAULT "/usr/local/lib/siod" #endif #ifdef vms #define SIOD_LIB_DEFAULT "SIOD_LIB:" #endif #ifdef WIN32 #define SIOD_LIB_DEFAULT "c:\\siod\\" #include #endif #endif char *siod_lib = SIOD_LIB_DEFAULT; void __stdcall process_cla(int argc,char **argv,int warnflag) {int k; char *ptr; static int siod_lib_set = 0; #if !defined(vms) if (!siod_lib_set) { #ifdef WIN32 if (argc > 0) {siod_lib = (char *)strdup(argv[0]); siod_lib_set = 1; if ((ptr = strrchr(siod_lib,'\\'))) ptr[1] = 0;} #endif if (getenv("SIOD_LIB")) {siod_lib = getenv("SIOD_LIB"); siod_lib_set = 1;}} #endif for(k=1;k= 2) {printf("Welcome to SIOD, Scheme In One Defun, Version %s\n", siod_version()); printf("(C) Copyright 1988-1994 Paradigm Associates Inc.\n");}} void __stdcall print_hs_1(void) {if (siod_verbose_level >= 2) {printf("%ld heaps. size = %ld cells, %ld bytes. %ld inums. GC is %s\n", nheaps, heap_size,heap_size*sizeof(struct obj), inums_dim, (gc_kind_copying == 1) ? "stop and copy" : "mark and sweep");}} void __stdcall print_hs_2(void) {if (siod_verbose_level >= 2) {if (gc_kind_copying == 1) printf("heaps[0] at %p, heaps[1] at %p\n",heaps[0],heaps[1]); else printf("heaps[0] at %p\n",heaps[0]);}} long no_interrupt(long n) {long x; x = nointerrupt; nointerrupt = n; if ((nointerrupt == 0) && (interrupt_differed == 1)) {interrupt_differed = 0; err_ctrl_c();} return(x);} void handle_sigfpe(int sig SIG_restargs) { #ifdef WIN32 _fpreset(); #endif signal(SIGFPE,handle_sigfpe); err("floating point exception",NIL);} void handle_sigint(int sig SIG_restargs) {signal(SIGINT,handle_sigint); #if defined(WIN32) interrupt_differed = 1; #else if (nointerrupt == 1) interrupt_differed = 1; else err_ctrl_c(); #endif } #if defined(WIN32) void handle_interrupt_differed(void) {interrupt_differed = 0; err_ctrl_c();} #endif void err_ctrl_c(void) {err("control-c interrupt",NIL);} LISP get_eof_val(void) {return(eof_val);} long repl_driver(long want_sigint,long want_init,struct repl_hooks *h) {int k; long rv; struct repl_hooks hd; LISP stack_start; static void (*osigint)(int); static void (*osigfpe)(int); stack_start_ptr = &stack_start; stack_limit_ptr = STACK_LIMIT(stack_start_ptr,stack_size); k = setjmp(errjmp); if (k == 2) {if (want_sigint) signal(SIGINT,osigint); signal(SIGFPE,osigfpe); stack_start_ptr = NULL; stack_limit_ptr = NULL; return(2);} if (want_sigint) osigint = signal(SIGINT,handle_sigint); #ifdef WIN32_X /* doesn't work, because library functions like atof depend on default setting, or some other reason I didn't have time to investigate. */ _controlfp(_EM_INVALID, _MCW_EM); #endif osigfpe = signal(SIGFPE,handle_sigfpe); catch_framep = (struct catch_frame *) NULL; errjmp_ok = 1; interrupt_differed = 0; nointerrupt = 0; if (want_init && init_file && (k == 0)) vload(init_file,0,1); if (!h) {hd.repl_puts = repl_puts; hd.repl_read = repl_read; hd.repl_eval = repl_eval; hd.repl_print = repl_print; rv = repl(&hd);} else rv = repl(h); if (want_sigint) signal(SIGINT,osigint); signal(SIGFPE,osigfpe); stack_start_ptr = NULL; stack_limit_ptr = NULL; return(rv);} static void ignore_puts(char *st) {} static void noprompt_puts(char *st) {if (strcmp(st,"> ") != 0) put_st(st);} static char *repl_c_string_arg = NULL; static char *repl_c_string_out = NULL; static long repl_c_string_flag = 0; static long repl_c_string_print_len = 0; static LISP repl_c_string_read(void) {LISP s; if (repl_c_string_arg == NULL) return(get_eof_val()); s = strcons(strlen(repl_c_string_arg),repl_c_string_arg); repl_c_string_arg = NULL; if (repl_c_string_out) repl_c_string_out[0] = 0; return(read_from_string(s));} static void ignore_print(LISP x) {repl_c_string_flag = 1;} static void not_ignore_print(LISP x) {repl_c_string_flag = 1; lprint(x,NIL);} struct rcsp_puts {char *ptr; char *end;}; static int rcsp_puts(char *from,void *cb) {long fromlen,intolen,cplen; struct rcsp_puts *p = (struct rcsp_puts *) cb; fromlen = strlen(from); intolen = p->end - p->ptr; cplen = (fromlen > intolen) ? intolen : fromlen; memcpy(p->ptr,from,cplen); p->ptr = &p->ptr[cplen]; *p->ptr = 0; if (cplen != fromlen) err("repl_c_string_print overflow",NIL); return(1);} static void repl_c_string_print(LISP x) {struct gen_printio s; struct rcsp_puts p; s.putc_fcn = NULL; s.puts_fcn = rcsp_puts; p.ptr = repl_c_string_out; p.end = &repl_c_string_out[repl_c_string_print_len - 1]; s.cb_argument = &p; lprin1g(x,&s); repl_c_string_flag = 1;} long __stdcall repl_c_string(char *str, long want_sigint,long want_init,long want_print) {struct repl_hooks h; long retval; h.repl_read = repl_c_string_read; h.repl_eval = NULL; if (want_print > 1) {h.repl_puts = ignore_puts; h.repl_print = repl_c_string_print; repl_c_string_print_len = want_print; repl_c_string_out = str;} else if (want_print) {h.repl_puts = noprompt_puts; h.repl_print = not_ignore_print; repl_c_string_print_len = 0; repl_c_string_out = NULL;} else {h.repl_puts = ignore_puts; h.repl_print = ignore_print; repl_c_string_print_len = 0; repl_c_string_out = NULL;} repl_c_string_arg = str; repl_c_string_flag = 0; retval = repl_driver(want_sigint,want_init,&h); if (retval != 0) return(retval); else if (repl_c_string_flag == 1) return(0); else return(2);} #ifdef unix #include #include #ifdef sun #include #endif #ifndef CLK_TCK #define CLK_TCK 60 #endif double myruntime(void) {double total; struct tms b; times(&b); total = b.tms_utime; total += b.tms_stime; return(total / (double)CLK_TCK);} #else #if defined(THINK_C) | defined(WIN32) | defined(VMS) #ifndef CLOCKS_PER_SEC #define CLOCKS_PER_SEC CLK_TCK #endif double myruntime(void) {return(((double) clock()) / ((double) CLOCKS_PER_SEC));} #else double myruntime(void) {time_t x; time(&x); return((double) x);} #endif #endif #if defined(__osf__) #include #ifndef TIMEOFDAY #define TIMEOFDAY 1 #endif double myrealtime(void) {struct timespec x; if (!getclock(TIMEOFDAY,&x)) return(x.tv_sec + (((double) x.tv_nsec) * 1.0e-9)); else return(0.0);} #endif #if defined(VMS) #include #include double myrealtime(void) {unsigned long x[2]; static double c = 0.0; if (sys$gettim(&x) == SS$_NORMAL) {if (c == 0.0) c = pow((double) 2,(double) 31) * 100.0e-9; return(x[0] * 100.0e-9 + x[1] * c);} else return(0.0);} #endif #if defined(SUN5) || defined(linux) #if defined(linux) #include #endif double myrealtime(void) {struct timeval x; if (gettimeofday(&x,NULL)) return(0.0); return(((double) x.tv_sec) + ((double) x.tv_usec) * 1.0E-6);} #endif #if defined(WIN32) #include double myrealtime(void) {struct _timeb x; _ftime(&x); return(x.time + ((double) x.millitm) * 0.001);} #endif #if !defined(__osf__) & !defined(VMS) & !defined(SUN5) & !defined(WIN32) &!defined(linux) double myrealtime(void) {time_t x; time(&x); return((double) x);} #endif void set_repl_hooks(void (*puts_f)(char *), LISP (*read_f)(void), LISP (*eval_f)(LISP), void (*print_f)(LISP)) {repl_puts = puts_f; repl_read = read_f; repl_eval = eval_f; repl_print = print_f;} void gput_st(struct gen_printio *f,char *st) {PUTS_FCN(st,f);} void fput_st(FILE *f,char *st) {long flag; flag = no_interrupt(1); fprintf(f,"%s",st); no_interrupt(flag);} int fputs_fcn(char *st,void *cb) {fput_st((FILE *)cb,st); return(1);} void put_st(char *st) {fput_st(stdout,st);} void grepl_puts(char *st,void (*repl_puts)(char *)) {if (repl_puts == NULL) {put_st(st); fflush(stdout);} else (*repl_puts)(st);} long repl(struct repl_hooks *h) {LISP x,cw = 0; double rt,ct; while(1) {if ((gc_kind_copying == 1) && ((gc_status_flag) || heap >= heap_end)) {rt = myruntime(); gc_stop_and_copy(); if (siod_verbose_level >= 2) {sprintf(tkbuffer, "GC took %g seconds, %ld compressed to %ld, %ld free\n", myruntime()-rt,old_heap_used,(long)(heap-heap_org),(long)(heap_end-heap)); grepl_puts(tkbuffer,h->repl_puts);}} if (siod_verbose_level >= 2) grepl_puts("> ",h->repl_puts); if (h->repl_read == NULL) x = lread(NIL); else x = (*h->repl_read)(); if EQ(x,eof_val) break; rt = myruntime(); ct = myrealtime(); if (gc_kind_copying == 1) cw = heap; else {gc_cells_allocated = 0; gc_time_taken = 0.0;} if (h->repl_eval == NULL) x = leval(x,NIL); else x = (*h->repl_eval)(x); if (gc_kind_copying == 1) sprintf(tkbuffer, "Evaluation took %g seconds %ld cons work, %g real.\n", myruntime()-rt, (long)(heap-cw), myrealtime()-ct); else sprintf(tkbuffer, "Evaluation took %g seconds (%g in gc) %ld cons work, %g real.\n", myruntime()-rt, gc_time_taken, gc_cells_allocated, myrealtime()-ct); if (siod_verbose_level >= 2) grepl_puts(tkbuffer,h->repl_puts); if (h->repl_print == NULL) {if (siod_verbose_level >= 2) lprint(x,NIL);} else (*h->repl_print)(x);} return(0);} void set_fatal_exit_hook(void (*fcn)(void)) {fatal_exit_hook = fcn;} static long inside_err = 0; LISP err(const char *message, LISP x) {struct catch_frame *l; long was_inside = inside_err; LISP retval,nx; const char *msg,*eobj; nointerrupt = 1; if ((!message) && CONSP(x) && TYPEP(CAR(x),tc_string)) {msg = get_c_string(CAR(x)); nx = CDR(x); retval = x;} else {msg = message; nx = x; retval = NIL;} if ((eobj = try_get_c_string(nx)) && !memchr(eobj,0,80 )) eobj = NULL; if ((siod_verbose_level >= 1) && msg) {if NULLP(nx) printf("ERROR: %s\n",msg); else if (eobj) printf("ERROR: %s (errobj %s)\n",msg,eobj); else printf("ERROR: %s (see errobj)\n",msg);} if (errjmp_ok == 1) {inside_err = 1; setvar(sym_errobj,nx,NIL); for(l=catch_framep; l; l = (*l).next) if (EQ((*l).tag,sym_errobj) || EQ((*l).tag,sym_catchall)) {if (!msg) msg = "quit"; (*l).retval = (NNULLP(retval) ? retval : (was_inside) ? NIL : cons(strcons(strlen(msg),msg),nx)); nointerrupt = 0; inside_err = 0; longjmp((*l).cframe,2);} inside_err = 0; longjmp(errjmp,(msg) ? 1 : 2);} if (siod_verbose_level >= 1) printf("FATAL ERROR DURING STARTUP OR CRITICAL CODE SECTION\n"); if (fatal_exit_hook) (*fatal_exit_hook)(); else exit(10); return(NIL);} LISP errswitch(void) {return(err("BUG. Reached impossible case",NIL));} void err_stack(char *ptr) /* The user could be given an option to continue here */ {err("the currently assigned stack limit has been exceded",NIL);} LISP stack_limit(LISP amount,LISP silent) {if NNULLP(amount) {stack_size = get_c_long(amount); stack_limit_ptr = STACK_LIMIT(stack_start_ptr,stack_size);} if NULLP(silent) {sprintf(tkbuffer,"Stack_size = %ld bytes, [%p,%p]\n", stack_size,stack_start_ptr,stack_limit_ptr); put_st(tkbuffer); return(NIL);} else return(flocons(stack_size));} char *try_get_c_string(LISP x) {if TYPEP(x,tc_symbol) return(PNAME(x)); else if TYPEP(x,tc_string) return(x->storage_as.string.data); else return(NULL);} char *get_c_string(LISP x) {if TYPEP(x,tc_symbol) return(PNAME(x)); else if TYPEP(x,tc_string) return(x->storage_as.string.data); else err("not a symbol or string",x); return(NULL);} char *get_c_string_dim(LISP x,long *len) {switch(TYPE(x)) {case tc_symbol: *len = strlen(PNAME(x)); return(PNAME(x)); case tc_string: case tc_byte_array: *len = x->storage_as.string.dim; return(x->storage_as.string.data); case tc_long_array: *len = x->storage_as.long_array.dim * sizeof(long); return((char *)x->storage_as.long_array.data); default: err("not a symbol or string",x); return(NULL);}} LISP lerr(LISP message, LISP x) {if (CONSP(message) && TYPEP(CAR(message),tc_string)) err(NULL,message); else err(get_c_string(message),x); return(NIL);} void gc_fatal_error(void) {err("ran out of storage",NIL);} LISP newcell(long type) {LISP z; NEWCELL(z,type); return(z);} LISP cons(LISP x,LISP y) {LISP z; NEWCELL(z,tc_cons); CAR(z) = x; CDR(z) = y; return(z);} LISP consp(LISP x) {if CONSP(x) return(sym_t); else return(NIL);} LISP car(LISP x) {switch TYPE(x) {case tc_nil: return(NIL); case tc_cons: return(CAR(x)); default: return(err("wta to car",x));}} LISP cdr(LISP x) {switch TYPE(x) {case tc_nil: return(NIL); case tc_cons: return(CDR(x)); default: return(err("wta to cdr",x));}} LISP setcar(LISP cell, LISP value) {if NCONSP(cell) err("wta to setcar",cell); return(CAR(cell) = value);} LISP setcdr(LISP cell, LISP value) {if NCONSP(cell) err("wta to setcdr",cell); return(CDR(cell) = value);} LISP flocons(double x) {LISP z; long n; if ((inums_dim > 0) && ((x - (n = (long)x)) == 0) && (x >= 0) && (n < inums_dim)) return(inums[n]); NEWCELL(z,tc_flonum); FLONM(z) = x; return(z);} LISP numberp(LISP x) {if FLONUMP(x) return(sym_t); else return(NIL);} LISP plus(LISP x,LISP y) {if NULLP(y) return(NULLP(x) ? flocons(0) : x); if NFLONUMP(x) err("wta(1st) to plus",x); if NFLONUMP(y) err("wta(2nd) to plus",y); return(flocons(FLONM(x) + FLONM(y)));} LISP ltimes(LISP x,LISP y) {if NULLP(y) return(NULLP(x) ? flocons(1) : x); if NFLONUMP(x) err("wta(1st) to times",x); if NFLONUMP(y) err("wta(2nd) to times",y); return(flocons(FLONM(x)*FLONM(y)));} LISP difference(LISP x,LISP y) {if NFLONUMP(x) err("wta(1st) to difference",x); if NULLP(y) return(flocons(-FLONM(x))); else {if NFLONUMP(y) err("wta(2nd) to difference",y); return(flocons(FLONM(x) - FLONM(y)));}} LISP Quotient(LISP x,LISP y) {if NFLONUMP(x) err("wta(1st) to quotient",x); if NULLP(y) return(flocons(1/FLONM(x))); else {if NFLONUMP(y) err("wta(2nd) to quotient",y); return(flocons(FLONM(x)/FLONM(y)));}} LISP lllabs(LISP x) {double v; if NFLONUMP(x) err("wta to abs",x); v = FLONM(x); if (v < 0) return(flocons(-v)); else return(x);} LISP lsqrt(LISP x) {if NFLONUMP(x) err("wta to sqrt",x); return(flocons(sqrt(FLONM(x))));} LISP greaterp(LISP x,LISP y) {if NFLONUMP(x) err("wta(1st) to greaterp",x); if NFLONUMP(y) err("wta(2nd) to greaterp",y); if (FLONM(x)>FLONM(y)) return(sym_t); return(NIL);} LISP lessp(LISP x,LISP y) {if NFLONUMP(x) err("wta(1st) to lessp",x); if NFLONUMP(y) err("wta(2nd) to lessp",y); if (FLONM(x)=FLONM(y)) return(sym_t); return(NIL);} LISP lessEp(LISP x,LISP y) {if NFLONUMP(x) err("wta(1st) to lessp",x); if NFLONUMP(y) err("wta(2nd) to lessp",y); if (FLONM(x)<=FLONM(y)) return(sym_t); return(NIL);} LISP lmax(LISP x,LISP y) {if NULLP(y) return(x); if NFLONUMP(x) err("wta(1st) to max",x); if NFLONUMP(y) err("wta(2nd) to max",y); return((FLONM(x) > FLONM(y)) ? x : y);} LISP lmin(LISP x,LISP y) {if NULLP(y) return(x); if NFLONUMP(x) err("wta(1st) to min",x); if NFLONUMP(y) err("wta(2nd) to min",y); return((FLONM(x) < FLONM(y)) ? x : y);} LISP eq(LISP x,LISP y) {if EQ(x,y) return(sym_t); else return(NIL);} LISP eql(LISP x,LISP y) {if EQ(x,y) return(sym_t); else if NFLONUMP(x) return(NIL); else if NFLONUMP(y) return(NIL); else if (FLONM(x) == FLONM(y)) return(sym_t); return(NIL);} LISP symcons(char *pname,LISP vcell) {LISP z; NEWCELL(z,tc_symbol); PNAME(z) = pname; VCELL(z) = vcell; return(z);} LISP symbolp(LISP x) {if SYMBOLP(x) return(sym_t); else return(NIL);} LISP err_ubv(LISP v) {return(err("unbound variable",v));} LISP symbol_boundp(LISP x,LISP env) {LISP tmp; if NSYMBOLP(x) err("not a symbol",x); tmp = envlookup(x,env); if NNULLP(tmp) return(sym_t); if EQ(VCELL(x),unbound_marker) return(NIL); else return(sym_t);} LISP symbol_value(LISP x,LISP env) {LISP tmp; if NSYMBOLP(x) err("not a symbol",x); tmp = envlookup(x,env); if NNULLP(tmp) return(CAR(tmp)); tmp = VCELL(x); if EQ(tmp,unbound_marker) err_ubv(x); return(tmp);} char *must_malloc(unsigned long size) {char *tmp; tmp = (char *) malloc((size) ? size : 1); if (tmp == (char *)NULL) err("failed to allocate storage from system",NIL); return(tmp);} LISP gen_intern(char *name,long copyp) {LISP l,sym,sl; char *cname; unsigned long hash=0,n,c,flag; flag = no_interrupt(1); if (obarray_dim > 1) {hash = 0; n = obarray_dim; cname = name; while((c = *cname++)) hash = ((hash * 17) ^ c) % n; sl = obarray[hash];} else sl = oblistvar; for(l=sl;NNULLP(l);l=CDR(l)) if (strcmp(name,PNAME(CAR(l))) == 0) {no_interrupt(flag); return(CAR(l));} if (copyp == 1) {cname = (char *) must_malloc(strlen(name)+1); strcpy(cname,name);} else cname = name; sym = symcons(cname,unbound_marker); if (obarray_dim > 1) obarray[hash] = cons(sym,sl); oblistvar = cons(sym,oblistvar); no_interrupt(flag); return(sym);} LISP cintern(char *name) {return(gen_intern(name,0));} LISP rintern(char *name) {return(gen_intern(name,1));} LISP intern(LISP name) {return(rintern(get_c_string(name)));} LISP subrcons(long type, char *name, SUBR_FUNC f) {LISP z; NEWCELL(z,type); (*z).storage_as.subr.name = name; (*z).storage_as.subr0.f = f; return(z);} LISP closure(LISP env,LISP code) {LISP z; NEWCELL(z,tc_closure); (*z).storage_as.closure.env = env; (*z).storage_as.closure.code = code; return(z);} void gc_protect(LISP *location) {gc_protect_n(location,1);} void gc_protect_n(LISP *location,long n) {struct gc_protected *reg; reg = (struct gc_protected *) must_malloc(sizeof(struct gc_protected)); (*reg).location = location; (*reg).length = n; (*reg).next = protected_registers; protected_registers = reg;} void gc_protect_sym(LISP *location,char *st) {*location = cintern(st); gc_protect(location);} void scan_registers(void) {struct gc_protected *reg; LISP *location; long j,n; for(reg = protected_registers; reg; reg = (*reg).next) {location = (*reg).location; n = (*reg).length; for(j=0;j 1) {obarray = (LISP *) must_malloc(sizeof(LISP) * obarray_dim); for(j=0;j 0) {inums = (LISP *) must_malloc(sizeof(LISP) * inums_dim); for(j=0;j= 0) && (type < tc_table_dim)) return(&user_types[type]); else err("type number out of range",NIL); return(NULL);} long allocate_user_tc(void) {long x = user_tc_next; if (x > tc_user_max) err("ran out of user type codes",NIL); ++user_tc_next; return(x);} void set_gc_hooks(long type, LISP (*rel)(LISP), LISP (*mark)(LISP), void (*scan)(LISP), void (*free)(LISP), long *kind) {struct user_type_hooks *p; p = get_user_type_hooks(type); p->gc_relocate = rel; p->gc_scan = scan; p->gc_mark = mark; p->gc_free = free; *kind = gc_kind_copying;} LISP gc_relocate(LISP x) {LISP nw; struct user_type_hooks *p; if EQ(x,NIL) return(NIL); if ((*x).gc_mark == 1) return(CAR(x)); switch TYPE(x) {case tc_flonum: case tc_cons: case tc_symbol: case tc_closure: case tc_subr_0: case tc_subr_1: case tc_subr_2: case tc_subr_2n: case tc_subr_3: case tc_subr_4: case tc_subr_5: case tc_lsubr: case tc_fsubr: case tc_msubr: if ((nw = heap) >= heap_end) gc_fatal_error(); heap = nw+1; memcpy(nw,x,sizeof(struct obj)); break; default: p = get_user_type_hooks(TYPE(x)); if (p->gc_relocate) nw = (*p->gc_relocate)(x); else {if ((nw = heap) >= heap_end) gc_fatal_error(); heap = nw+1; memcpy(nw,x,sizeof(struct obj));}} (*x).gc_mark = 1; CAR(x) = nw; return(nw);} LISP get_newspace(void) {LISP newspace; if (heap_org == heaps[0]) newspace = heaps[1]; else newspace = heaps[0]; heap = newspace; heap_org = heap; heap_end = heap + heap_size; return(newspace);} void scan_newspace(LISP newspace) {LISP ptr; struct user_type_hooks *p; for(ptr=newspace; ptr < heap; ++ptr) {switch TYPE(ptr) {case tc_cons: case tc_closure: CAR(ptr) = gc_relocate(CAR(ptr)); CDR(ptr) = gc_relocate(CDR(ptr)); break; case tc_symbol: VCELL(ptr) = gc_relocate(VCELL(ptr)); break; case tc_flonum: case tc_subr_0: case tc_subr_1: case tc_subr_2: case tc_subr_2n: case tc_subr_3: case tc_subr_4: case tc_subr_5: case tc_lsubr: case tc_fsubr: case tc_msubr: break; default: p = get_user_type_hooks(TYPE(ptr)); if (p->gc_scan) (*p->gc_scan)(ptr);}}} void free_oldspace(LISP space,LISP end) {LISP ptr; struct user_type_hooks *p; for(ptr=space; ptr < end; ++ptr) if (ptr->gc_mark == 0) switch TYPE(ptr) {case tc_cons: case tc_closure: case tc_symbol: case tc_flonum: case tc_subr_0: case tc_subr_1: case tc_subr_2: case tc_subr_2n: case tc_subr_3: case tc_subr_4: case tc_subr_5: case tc_lsubr: case tc_fsubr: case tc_msubr: break; default: p = get_user_type_hooks(TYPE(ptr)); if (p->gc_free) (*p->gc_free)(ptr);}} void gc_stop_and_copy(void) {LISP newspace,oldspace,end; long flag; flag = no_interrupt(1); errjmp_ok = 0; oldspace = heap_org; end = heap; old_heap_used = end - oldspace; newspace = get_newspace(); scan_registers(); scan_newspace(newspace); free_oldspace(oldspace,end); errjmp_ok = 1; no_interrupt(flag);} LISP allocate_aheap(void) {long j,flag; LISP ptr,end,next; gc_kind_check(); for(j=0;j= 4)) printf("[allocating heap %ld]\n",j); heaps[j] = (LISP) must_malloc(sizeof(struct obj)*heap_size); ptr = heaps[j]; end = heaps[j] + heap_size; while(1) {(*ptr).type = tc_free_cell; next = ptr + 1; if (next < end) {CDR(ptr) = next; ptr = next;} else {CDR(ptr) = freelist; break;}} freelist = heaps[j]; flag = no_interrupt(flag); return(sym_t);} return(NIL);} void gc_for_newcell(void) {long flag,n; LISP l; if (heap < heap_end) {freelist = heap; CDR(freelist) = NIL; ++heap; return;} if (errjmp_ok == 0) gc_fatal_error(); flag = no_interrupt(1); errjmp_ok = 0; gc_mark_and_sweep(); errjmp_ok = 1; no_interrupt(flag); for(n=0,l=freelist;(n < 100) && NNULLP(l); ++n) l = CDR(l); if (n == 0) {if NULLP(allocate_aheap()) gc_fatal_error();} else if ((n == 100) && NNULLP(sym_after_gc)) leval(leval(sym_after_gc,NIL),NIL); else allocate_aheap();} void gc_mark_and_sweep(void) {LISP stack_end; gc_ms_stats_start(); while(heap < heap_end) {heap->type = tc_free_cell; heap->gc_mark = 0; ++heap;} setjmp(save_regs_gc_mark); mark_locations((LISP *) save_regs_gc_mark, (LISP *) (((char *) save_regs_gc_mark) + sizeof(save_regs_gc_mark))); mark_protected_registers(); mark_locations((LISP *) stack_start_ptr, (LISP *) &stack_end); #ifdef THINK_C mark_locations((LISP *) ((char *) stack_start_ptr + 2), (LISP *) ((char *) &stack_end + 2)); #endif gc_sweep(); gc_ms_stats_end();} void gc_ms_stats_start(void) {gc_rt = myruntime(); gc_cells_collected = 0; if (gc_status_flag && (siod_verbose_level >= 4)) printf("[starting GC]\n");} void gc_ms_stats_end(void) {gc_rt = myruntime() - gc_rt; gc_time_taken = gc_time_taken + gc_rt; if (gc_status_flag && (siod_verbose_level >= 4)) printf("[GC took %g cpu seconds, %ld cells collected]\n", gc_rt, gc_cells_collected);} void gc_mark(LISP ptr) {struct user_type_hooks *p; gc_mark_loop: if NULLP(ptr) return; if ((*ptr).gc_mark) return; (*ptr).gc_mark = 1; switch ((*ptr).type) {case tc_flonum: break; case tc_cons: gc_mark(CAR(ptr)); ptr = CDR(ptr); goto gc_mark_loop; case tc_symbol: ptr = VCELL(ptr); goto gc_mark_loop; case tc_closure: gc_mark((*ptr).storage_as.closure.code); ptr = (*ptr).storage_as.closure.env; goto gc_mark_loop; case tc_subr_0: case tc_subr_1: case tc_subr_2: case tc_subr_2n: case tc_subr_3: case tc_subr_4: case tc_subr_5: case tc_lsubr: case tc_fsubr: case tc_msubr: break; default: p = get_user_type_hooks(TYPE(ptr)); if (p->gc_mark) ptr = (*p->gc_mark)(ptr);}} void mark_protected_registers(void) {struct gc_protected *reg; LISP *location; long j,n; for(reg = protected_registers; reg; reg = (*reg).next) {location = (*reg).location; n = (*reg).length; for(j=0;j end) {tmp = start; start = end; end = tmp;} n = end - start; mark_locations_array(start,n);} long looks_pointerp(LISP p) {long j; LISP h; for(j=0;j= h) && (p < (h + heap_size)) && (((((char *)p) - ((char *)h)) % sizeof(struct obj)) == 0) && NTYPEP(p,tc_free_cell)) return(1); return(0);} void mark_locations_array(LISP *x,long n) {int j; LISP p; for(j=0;jgc_free) (*p->gc_free)(ptr);} ++n; (*ptr).type = tc_free_cell; CDR(ptr) = nfreelist; nfreelist = ptr;} else (*ptr).gc_mark = 0;} gc_cells_collected = n; freelist = nfreelist;} void gc_kind_check(void) {if (gc_kind_copying == 1) err("cannot perform operation with stop-and-copy GC mode. Use -g0\n", NIL);} LISP user_gc(LISP args) {long old_status_flag,flag; gc_kind_check(); flag = no_interrupt(1); errjmp_ok = 0; old_status_flag = gc_status_flag; if NNULLP(args) { if NULLP(car(args)) gc_status_flag = 0; else gc_status_flag = 1; } gc_mark_and_sweep(); gc_status_flag = old_status_flag; errjmp_ok = 1; no_interrupt(flag); return(NIL);} long nactive_heaps(void) {long m; for(m=0;(m < nheaps) && heaps[m];++m); return(m);} long freelist_length(void) {long n; LISP l; for(n=0,l=freelist;NNULLP(l); ++n) l = CDR(l); n += (heap_end - heap); return(n);} LISP gc_status(LISP args) {long n,m; if NNULLP(args) { if NULLP(car(args)) gc_status_flag = 0; else gc_status_flag = 1; } if (gc_kind_copying == 1) {if (gc_status_flag) put_st("garbage collection is on\n"); else put_st("garbage collection is off\n"); sprintf(tkbuffer,"%ld allocated %ld free\n", (long)(heap - heap_org), (long)(heap_end - heap)); put_st(tkbuffer);} else {if (gc_status_flag) put_st("garbage collection verbose\n"); else put_st("garbage collection silent\n"); {m = nactive_heaps(); n = freelist_length(); sprintf(tkbuffer,"%ld/%ld heaps, %ld allocated %ld free\n", m,nheaps,m*heap_size - n,n); put_st(tkbuffer);}} return(NIL);} LISP gc_info(LISP arg) {switch(get_c_long(arg)) {case 0: return((gc_kind_copying == 1) ? sym_t : NIL); case 1: return(flocons(nactive_heaps())); case 2: return(flocons(nheaps)); case 3: return(flocons(heap_size)); case 4: return(flocons((gc_kind_copying == 1) ? (long) (heap_end - heap) : freelist_length())); default: return(NIL);}} LISP leval_args(LISP l,LISP env) {LISP result,v1,v2,tmp; if NULLP(l) return(NIL); if NCONSP(l) err("bad syntax argument list",l); result = cons(leval(CAR(l),env),NIL); for(v1=result,v2=CDR(l); CONSP(v2); v1 = tmp, v2 = CDR(v2)) {tmp = cons(leval(CAR(v2),env),NIL); CDR(v1) = tmp;} if NNULLP(v2) err("bad syntax argument list",l); return(result);} LISP extend_env(LISP actuals,LISP formals,LISP env) {if SYMBOLP(formals) return(cons(cons(cons(formals,NIL),cons(actuals,NIL)),env)); return(cons(cons(formals,actuals),env));} #define ENVLOOKUP_TRICK 1 LISP envlookup(LISP var,LISP env) {LISP frame,al,fl,tmp; for(frame=env;CONSP(frame);frame=CDR(frame)) {tmp = CAR(frame); if NCONSP(tmp) err("damaged frame",tmp); for(fl=CAR(tmp),al=CDR(tmp);CONSP(fl);fl=CDR(fl),al=CDR(al)) {if NCONSP(al) err("too few arguments",tmp); if EQ(CAR(fl),var) return(al);} /* suggested by a user. It works for reference (although conses) but doesn't allow for set! to work properly... */ #if (ENVLOOKUP_TRICK) if (SYMBOLP(fl) && EQ(fl, var)) return(cons(al, NIL)); #endif } if NNULLP(frame) err("damaged env",env); return(NIL);} void set_eval_hooks(long type,LISP (*fcn)(LISP, LISP *,LISP *)) {struct user_type_hooks *p; p = get_user_type_hooks(type); p->leval = fcn;} LISP err_closure_code(LISP tmp) {return(err("closure code type not valid",tmp));} LISP leval(LISP x,LISP env) {LISP tmp,arg1; struct user_type_hooks *p; STACK_CHECK(&x); loop: INTERRUPT_CHECK(); tmp = VCELL(sym_eval_history_ptr); if TYPEP(tmp,tc_cons) {CAR(tmp) = x; VCELL(sym_eval_history_ptr) = CDR(tmp);} switch TYPE(x) {case tc_symbol: tmp = envlookup(x,env); if NNULLP(tmp) return(CAR(tmp)); tmp = VCELL(x); /* if EQ(tmp,unbound_marker) err_ubv(x); */ return(tmp); case tc_cons: tmp = CAR(x); switch TYPE(tmp) {case tc_symbol: tmp = envlookup(tmp,env); if NNULLP(tmp) {tmp = CAR(tmp); break;} tmp = VCELL(CAR(x)); if EQ(tmp,unbound_marker) err_ubv(CAR(x)); break; case tc_cons: tmp = leval(tmp,env); break;} switch TYPE(tmp) {case tc_subr_0: return(SUBR0(tmp)()); case tc_subr_1: return(SUBR1(tmp)(leval(car(CDR(x)),env))); case tc_subr_2: x = CDR(x); arg1 = leval(car(x),env); x = NULLP(x) ? NIL : CDR(x); return(SUBR2(tmp)(arg1, leval(car(x),env))); case tc_subr_2n: x = CDR(x); arg1 = leval(car(x),env); x = NULLP(x) ? NIL : CDR(x); arg1 = SUBR2(tmp)(arg1, leval(car(x),env)); for(x=cdr(x);CONSP(x);x=CDR(x)) arg1 = SUBR2(tmp)(arg1,leval(CAR(x),env)); return(arg1); case tc_subr_3: x = CDR(x); arg1 = leval(car(x),env); x = NULLP(x) ? NIL : CDR(x); return(SUBR3(tmp)(arg1, leval(car(x),env), leval(car(cdr(x)),env))); case tc_subr_4: x = CDR(x); arg1 = leval(car(x),env); x = NULLP(x) ? NIL : CDR(x); return(SUBR4(tmp)(arg1, leval(car(x),env), leval(car(cdr(x)),env), leval(car(cdr(cdr(x))),env))); case tc_subr_5: x = CDR(x); arg1 = leval(car(x),env); x = NULLP(x) ? NIL : CDR(x); return(SUBR5(tmp)(arg1, leval(car(x),env), leval(car(cdr(x)),env), leval(car(cdr(cdr(x))),env), leval(car(cdr(cdr(cdr(x)))),env))); case tc_lsubr: return(SUBR1(tmp)(leval_args(CDR(x),env))); case tc_fsubr: return(SUBR2(tmp)(CDR(x),env)); case tc_msubr: if NULLP(SUBRM(tmp)(&x,&env)) return(x); goto loop; case tc_closure: switch TYPE((*tmp).storage_as.closure.code) {case tc_cons: env = extend_env(leval_args(CDR(x),env), CAR((*tmp).storage_as.closure.code), (*tmp).storage_as.closure.env); x = CDR((*tmp).storage_as.closure.code); goto loop; case tc_subr_1: return(SUBR1(tmp->storage_as.closure.code) (tmp->storage_as.closure.env)); case tc_subr_2: x = CDR(x); arg1 = leval(car(x),env); return(SUBR2(tmp->storage_as.closure.code) (tmp->storage_as.closure.env,arg1)); case tc_subr_3: x = CDR(x); arg1 = leval(car(x),env); x = NULLP(x) ? NIL : CDR(x); return(SUBR3(tmp->storage_as.closure.code) (tmp->storage_as.closure.env, arg1, leval(car(x),env))); case tc_subr_4: x = CDR(x); arg1 = leval(car(x),env); x = NULLP(x) ? NIL : CDR(x); return(SUBR4(tmp->storage_as.closure.code) (tmp->storage_as.closure.env, arg1, leval(car(x),env), leval(car(cdr(x)),env))); case tc_subr_5: x = CDR(x); arg1 = leval(car(x),env); x = NULLP(x) ? NIL : CDR(x); return(SUBR5(tmp->storage_as.closure.code) (tmp->storage_as.closure.env, arg1, leval(car(x),env), leval(car(cdr(x)),env), leval(car(cdr(cdr(x))),env))); case tc_lsubr: return(SUBR1(tmp->storage_as.closure.code) (cons(tmp->storage_as.closure.env, leval_args(CDR(x),env)))); default: err_closure_code(tmp);} break; case tc_symbol: x = cons(tmp,cons(cons(sym_quote,cons(x,NIL)),NIL)); x = leval(x,NIL); goto loop; default: p = get_user_type_hooks(TYPE(tmp)); if (p->leval) {if NULLP((*p->leval)(tmp,&x,&env)) return(x); else goto loop;} err("bad function",tmp);} default: return(x);}} LISP lapply(LISP fcn,LISP args) {struct user_type_hooks *p; LISP acc; STACK_CHECK(&fcn); INTERRUPT_CHECK(); switch TYPE(fcn) {case tc_subr_0: return(SUBR0(fcn)()); case tc_subr_1: return(SUBR1(fcn)(car(args))); case tc_subr_2: return(SUBR2(fcn)(car(args),car(cdr(args)))); case tc_subr_2n: acc = SUBR2(fcn)(car(args),car(cdr(args))); for(args=cdr(cdr(args));CONSP(args);args=CDR(args)) acc = SUBR2(fcn)(acc,CAR(args)); return(acc); case tc_subr_3: return(SUBR3(fcn)(car(args),car(cdr(args)),car(cdr(cdr(args))))); case tc_subr_4: return(SUBR4(fcn)(car(args),car(cdr(args)),car(cdr(cdr(args))), car(cdr(cdr(cdr(args)))))); case tc_subr_5: return(SUBR5(fcn)(car(args),car(cdr(args)),car(cdr(cdr(args))), car(cdr(cdr(cdr(args)))), car(cdr(cdr(cdr(cdr(args))))))); case tc_lsubr: return(SUBR1(fcn)(args)); case tc_fsubr: case tc_msubr: case tc_symbol: return(err("cannot be applied",fcn)); case tc_closure: switch TYPE(fcn->storage_as.closure.code) {case tc_cons: return(leval(cdr(fcn->storage_as.closure.code), extend_env(args, car(fcn->storage_as.closure.code), fcn->storage_as.closure.env))); case tc_subr_1: return(SUBR1(fcn->storage_as.closure.code) (fcn->storage_as.closure.env)); case tc_subr_2: return(SUBR2(fcn->storage_as.closure.code) (fcn->storage_as.closure.env, car(args))); case tc_subr_3: return(SUBR3(fcn->storage_as.closure.code) (fcn->storage_as.closure.env, car(args),car(cdr(args)))); case tc_subr_4: return(SUBR4(fcn->storage_as.closure.code) (fcn->storage_as.closure.env, car(args),car(cdr(args)),car(cdr(cdr(args))))); case tc_subr_5: return(SUBR5(fcn->storage_as.closure.code) (fcn->storage_as.closure.env, car(args),car(cdr(args)),car(cdr(cdr(args))), car(cdr(cdr(cdr(args)))))); case tc_lsubr: return(SUBR1(fcn->storage_as.closure.code) (cons(fcn->storage_as.closure.env,args))); default: return(err_closure_code(fcn));} default: p = get_user_type_hooks(TYPE(fcn)); if (p->leval) return(err("have eval, dont know apply",fcn)); else return(err("cannot be applied",fcn));}} LISP setvar(LISP var,LISP val,LISP env) {LISP tmp; if NSYMBOLP(var) err("wta(non-symbol) to setvar",var); tmp = envlookup(var,env); if NULLP(tmp) return(VCELL(var) = val); return(CAR(tmp)=val);} LISP leval_setq(LISP args,LISP env) {return(setvar(car(args),leval(car(cdr(args)),env),env));} LISP syntax_define(LISP args) {if SYMBOLP(car(args)) return(args); return(syntax_define( cons(car(car(args)), cons(cons(sym_lambda, cons(cdr(car(args)), cdr(args))), NIL))));} LISP leval_define(LISP args,LISP env) {LISP tmp,var,val; tmp = syntax_define(args); var = car(tmp); if NSYMBOLP(var) err("wta(non-symbol) to define",var); val = leval(car(cdr(tmp)),env); tmp = envlookup(var,env); if NNULLP(tmp) return(CAR(tmp) = val); if NULLP(env) return(VCELL(var) = val); tmp = car(env); setcar(tmp,cons(var,car(tmp))); setcdr(tmp,cons(val,cdr(tmp))); return(val);} LISP leval_if(LISP *pform,LISP *penv) {LISP args,env; args = cdr(*pform); env = *penv; if NNULLP(leval(car(args),env)) *pform = car(cdr(args)); else *pform = car(cdr(cdr(args))); return(sym_t);} LISP leval_lambda(LISP args,LISP env) {LISP body; if NULLP(cdr(cdr(args))) body = car(cdr(args)); else body = cons(sym_progn,cdr(args)); return(closure(env,cons(arglchk(car(args)),body)));} LISP leval_progn(LISP *pform,LISP *penv) {LISP env,l,next; env = *penv; l = cdr(*pform); next = cdr(l); while(NNULLP(next)) {leval(car(l),env);l=next;next=cdr(next);} *pform = car(l); return(sym_t);} LISP leval_or(LISP *pform,LISP *penv) {LISP env,l,next,val; env = *penv; l = cdr(*pform); next = cdr(l); while(NNULLP(next)) {val = leval(car(l),env); if NNULLP(val) {*pform = val; return(NIL);} l=next;next=cdr(next);} *pform = car(l); return(sym_t);} LISP leval_and(LISP *pform,LISP *penv) {LISP env,l,next; env = *penv; l = cdr(*pform); if NULLP(l) {*pform = sym_t; return(NIL);} next = cdr(l); while(NNULLP(next)) {if NULLP(leval(car(l),env)) {*pform = NIL; return(NIL);} l=next;next=cdr(next);} *pform = car(l); return(sym_t);} LISP leval_catch_1(LISP forms,LISP env) {LISP l,val = NIL; for(l=forms; NNULLP(l); l = cdr(l)) val = leval(car(l),env); catch_framep = catch_framep->next; return(val);} LISP leval_catch(LISP args,LISP env) {struct catch_frame frame; int k; frame.tag = leval(car(args),env); frame.next = catch_framep; k = setjmp(frame.cframe); catch_framep = &frame; if (k == 2) {catch_framep = frame.next; return(frame.retval);} return(leval_catch_1(cdr(args),env));} LISP lthrow(LISP tag,LISP value) {struct catch_frame *l; for(l=catch_framep; l; l = (*l).next) if (EQ((*l).tag,tag) || EQ((*l).tag,sym_catchall)) {(*l).retval = value; longjmp((*l).cframe,2);} err("no *catch found with this tag",tag); return(NIL);} LISP leval_let(LISP *pform,LISP *penv) {LISP env,l; l = cdr(*pform); env = *penv; *penv = extend_env(leval_args(car(cdr(l)),env),car(l),env); *pform = car(cdr(cdr(l))); return(sym_t);} LISP letstar_macro(LISP form) {LISP bindings = cadr(form); if (NNULLP(bindings) && NNULLP(cdr(bindings))) setcdr(form,cons(cons(car(bindings),NIL), cons(cons(cintern("let*"), cons(cdr(bindings), cddr(form))), NIL))); setcar(form,cintern("let")); return(form);} LISP letrec_macro(LISP form) {LISP letb,setb,l; for(letb=NIL,setb=cddr(form),l=cadr(form);NNULLP(l);l=cdr(l)) {letb = cons(cons(caar(l),NIL),letb); setb = cons(listn(3,cintern("set!"),caar(l),cadar(l)),setb);} setcdr(form,cons(letb,setb)); setcar(form,cintern("let")); return(form);} LISP reverse(LISP l) {LISP n,p; n = NIL; for(p=l;NNULLP(p);p=cdr(p)) n = cons(car(p),n); return(n);} LISP let_macro(LISP form) {LISP p,fl,al,tmp; fl = NIL; al = NIL; for(p=car(cdr(form));NNULLP(p);p=cdr(p)) {tmp = car(p); if SYMBOLP(tmp) {fl = cons(tmp,fl); al = cons(NIL,al);} else {fl = cons(car(tmp),fl); al = cons(car(cdr(tmp)),al);}} p = cdr(cdr(form)); if NULLP(cdr(p)) p = car(p); else p = cons(sym_progn,p); setcdr(form,cons(reverse(fl),cons(reverse(al),cons(p,NIL)))); setcar(form,cintern("let-internal")); return(form);} LISP leval_quote(LISP args,LISP env) {return(car(args));} LISP leval_tenv(LISP args,LISP env) {return(env);} LISP leval_while(LISP args,LISP env) {LISP l; while NNULLP(leval(car(args),env)) for(l=cdr(args);NNULLP(l);l=cdr(l)) leval(car(l),env); return(NIL);} LISP symbolconc(LISP args) {long size; LISP l,s; size = 0; tkbuffer[0] = 0; for(l=args;NNULLP(l);l=cdr(l)) {s = car(l); if NSYMBOLP(s) err("wta(non-symbol) to symbolconc",s); size = size + strlen(PNAME(s)); if (size > TKBUFFERN) err("symbolconc buffer overflow",NIL); strcat(tkbuffer,PNAME(s));} return(rintern(tkbuffer));} void set_print_hooks(long type,void (*fcn)(LISP,struct gen_printio *)) {struct user_type_hooks *p; p = get_user_type_hooks(type); p->prin1 = fcn;} char *subr_kind_str(long n) {switch(n) {case tc_subr_0: return("subr_0"); case tc_subr_1: return("subr_1"); case tc_subr_2: return("subr_2"); case tc_subr_2n: return("subr_2n"); case tc_subr_3: return("subr_3"); case tc_subr_4: return("subr_4"); case tc_subr_5: return("subr_5"); case tc_lsubr: return("lsubr"); case tc_fsubr: return("fsubr"); case tc_msubr: return("msubr"); default: return("???");}} LISP lprin1g(LISP exp,struct gen_printio *f) {LISP tmp; long n; struct user_type_hooks *p; STACK_CHECK(&exp); INTERRUPT_CHECK(); switch TYPE(exp) {case tc_nil: gput_st(f,"()"); break; case tc_cons: gput_st(f,"("); lprin1g(car(exp),f); for(tmp=cdr(exp);CONSP(tmp);tmp=cdr(tmp)) {gput_st(f," ");lprin1g(car(tmp),f);} if NNULLP(tmp) {gput_st(f," . ");lprin1g(tmp,f);} gput_st(f,")"); break; case tc_flonum: n = (long) FLONM(exp); if (((double) n) == FLONM(exp)) sprintf(tkbuffer,"%ld",n); else sprintf(tkbuffer,"%g",FLONM(exp)); gput_st(f,tkbuffer); break; case tc_symbol: gput_st(f,PNAME(exp)); break; case tc_subr_0: case tc_subr_1: case tc_subr_2: case tc_subr_2n: case tc_subr_3: case tc_subr_4: case tc_subr_5: case tc_lsubr: case tc_fsubr: case tc_msubr: sprintf(tkbuffer,"#<%s ",subr_kind_str(TYPE(exp))); gput_st(f,tkbuffer); gput_st(f,(*exp).storage_as.subr.name); gput_st(f,">"); break; case tc_closure: gput_st(f,"#"); break; default: p = get_user_type_hooks(TYPE(exp)); if (p->prin1) (*p->prin1)(exp,f); else {sprintf(tkbuffer,"#",TYPE(exp),exp); gput_st(f,tkbuffer);}} return(NIL);} LISP lprint(LISP exp,LISP lf) {FILE *f = get_c_file(lf,stdout); lprin1f(exp,f); fput_st(f,"\n"); return(NIL);} LISP lprin1(LISP exp,LISP lf) {FILE *f = get_c_file(lf,stdout); lprin1f(exp,f); return(NIL);} LISP lprin1f(LISP exp,FILE *f) {struct gen_printio s; s.putc_fcn = NULL; s.puts_fcn = fputs_fcn; s.cb_argument = f; lprin1g(exp,&s); return(NIL);} LISP lread(LISP f) {return(lreadf(get_c_file(f,stdin)));} int f_getc(FILE *f) {long iflag,dflag; int c; iflag = no_interrupt(1); dflag = interrupt_differed; c = getc(f); #ifdef VMS if ((dflag == 0) & interrupt_differed & (f == stdin)) while((c != 0) & (c != EOF)) c = getc(f); #endif no_interrupt(iflag); return(c);} void f_ungetc(int c, FILE *f) {ungetc(c,f);} int flush_ws(struct gen_readio *f,char *eoferr) {int c,commentp; commentp = 0; while(1) {c = GETC_FCN(f); if (c == EOF) {if (eoferr) err(eoferr,NIL); else return(c);} if (commentp) {if (c == '\n') commentp = 0;} else if (c == ';') commentp = 1; else if (!isspace(c)) return(c);}} LISP lreadf(FILE *f) {struct gen_readio s; s.getc_fcn = (int (*)(void *)) f_getc; s.ungetc_fcn = (void (*)(int,void *)) f_ungetc; s.cb_argument = (char *) f; return(readtl(&s));} LISP readtl(struct gen_readio *f) {int c; c = flush_ws(f,(char *)NULL); if (c == EOF) return(eof_val); UNGETC_FCN(c,f); return(lreadr(f));} void set_read_hooks(char *all_set,char *end_set, LISP (*fcn1)(int, struct gen_readio *), LISP (*fcn2)(char *,long, int *)) {user_ch_readm = all_set; user_te_readm = end_set; user_readm = fcn1; user_readt = fcn2;} LISP lreadr(struct gen_readio *f) {int c,j; char *p,*buffer=tkbuffer; STACK_CHECK(&f); p = buffer; c = flush_ws(f,"end of file inside read"); switch (c) {case '(': return(lreadparen(f)); case ')': err("unexpected close paren",NIL); case '\'': return(cons(sym_quote,cons(lreadr(f),NIL))); case '`': return(cons(cintern("+internal-backquote"),lreadr(f))); case ',': c = GETC_FCN(f); switch(c) {case '@': p = "+internal-comma-atsign"; break; case '.': p = "+internal-comma-dot"; break; default: p = "+internal-comma"; UNGETC_FCN(c,f);} return(cons(cintern(p),lreadr(f))); case '"': return(lreadstring(f)); case '#': return(lreadsharp(f)); default: if ((user_readm != NULL) && strchr(user_ch_readm,c)) return((*user_readm)(c,f));} *p++ = c; for(j = 1; jstorage_as.c_file.f = (FILE *)NULL; sym->storage_as.c_file.name = (char *)NULL; if (!(sym->storage_as.c_file.f = (*fcn)(name,how))) {SAFE_STRCPY(errmsg,"could not open "); SAFE_STRCAT(errmsg,name); err(errmsg,llast_c_errmsg(-1));} sym->storage_as.c_file.name = (char *) must_malloc(strlen(name)+1); strcpy(sym->storage_as.c_file.name,name); no_interrupt(flag); return(sym);} LISP fopen_c(char *name,char *how) {return(fopen_cg(fopen,name,how));} LISP fopen_l(LISP name,LISP how) {return(fopen_c(get_c_string(name),NULLP(how) ? "r" : get_c_string(how)));} LISP delq(LISP elem,LISP l) {if NULLP(l) return(l); STACK_CHECK(&elem); if EQ(elem,car(l)) return(delq(elem,cdr(l))); setcdr(l,delq(elem,cdr(l))); return(l);} LISP fclose_l(LISP p) {long flag; flag = no_interrupt(1); if NTYPEP(p,tc_c_file) err("not a file",p); file_gc_free(p); no_interrupt(flag); return(NIL);} LISP vload(char *ofname,long cflag,long rflag) {LISP form,result,tail,lf,reader = NIL; FILE *f; int c; long j,len; char buffer[512],*key = "parser:",*start,*end,*ftype=".scm",*fname; if ((start = strchr(ofname,VLOAD_OFFSET_HACK_CHAR))) {len = atol(ofname); fname = &start[1];} else {len = 0; fname = ofname;} if (rflag) {int iflag; iflag = no_interrupt(1); if ((f = fopen(fname,"r"))) fclose(f); else if ((fname[0] != '/') && ((strlen(siod_lib) + strlen(fname) + 1) < sizeof(buffer))) {strcpy(buffer,siod_lib); #ifdef unix strcat(buffer,"/"); #endif strcat(buffer,fname); if ((f = fopen(buffer,"r"))) {fname = buffer; fclose(f);}} no_interrupt(iflag);} if (siod_verbose_level >= 3) {put_st("loading "); put_st(fname); put_st("\n");} lf = fopen_c(fname,(len) ? "rb" : "r"); f = lf->storage_as.c_file.f; result = NIL; tail = NIL; for(j=0;j= 5) {put_st("parser:"); lprin1(reader,NIL); put_st("\n");}} while(1) {form = NULLP(reader) ? lread(lf) : funcall1(reader,lf); if EQ(form,eof_val) break; if (siod_verbose_level >= 5) lprint(form,NIL); if (cflag) {form = cons(form,NIL); if NULLP(result) result = tail = form; else tail = setcdr(tail,form);} else leval(form,NIL);} fclose_l(lf); if (siod_verbose_level >= 3) put_st("done.\n"); return(result);} LISP load(LISP fname,LISP cflag,LISP rflag) {return(vload(get_c_string(fname),NULLP(cflag) ? 0 : 1,NULLP(rflag) ? 0 : 1));} LISP require(LISP fname) {LISP sym; sym = intern(string_append(cons(cintern("*"), cons(fname, cons(cintern("-loaded*"),NIL))))); if (NULLP(symbol_boundp(sym,NIL)) || NULLP(symbol_value(sym,NIL))) {load(fname,NIL,sym_t); setvar(sym,sym_t,NIL);} return(sym);} LISP save_forms(LISP fname,LISP forms,LISP how) {char *cname,*chow = NULL; LISP l,lf; FILE *f; cname = get_c_string(fname); if EQ(how,NIL) chow = "w"; else if EQ(how,cintern("a")) chow = "a"; else err("bad argument to save-forms",how); if (siod_verbose_level >= 3) {put_st((*chow == 'a') ? "appending" : "saving"); put_st(" forms to "); put_st(cname); put_st("\n");} lf = fopen_c(cname,chow); f = lf->storage_as.c_file.f; for(l=forms;NNULLP(l);l=cdr(l)) {lprin1f(car(l),f); putc('\n',f);} fclose_l(lf); if (siod_verbose_level >= 3) put_st("done.\n"); return(sym_t);} LISP quit(void) {return(err(NULL,NIL));} LISP nullp(LISP x) {if EQ(x,NIL) return(sym_t); else return(NIL);} LISP arglchk(LISP x) { #if (!ENVLOOKUP_TRICK) LISP l; if SYMBOLP(x) return(x); for(l=x;CONSP(l);l=CDR(l)); if NNULLP(l) err("improper formal argument list",x); #endif return(x);} void file_gc_free(LISP ptr) {if (ptr->storage_as.c_file.f) {fclose(ptr->storage_as.c_file.f); ptr->storage_as.c_file.f = (FILE *) NULL;} if (ptr->storage_as.c_file.name) {free(ptr->storage_as.c_file.name); ptr->storage_as.c_file.name = NULL;}} void file_prin1(LISP ptr,struct gen_printio *f) {char *name; name = ptr->storage_as.c_file.name; gput_st(f,"#storage_as.c_file.f); gput_st(f,tkbuffer); if (name) {gput_st(f," "); gput_st(f,name);} gput_st(f,">");} FILE *get_c_file(LISP p,FILE *deflt) {if (NULLP(p) && deflt) return(deflt); if NTYPEP(p,tc_c_file) err("not a file",p); if (!p->storage_as.c_file.f) err("file is closed",p); return(p->storage_as.c_file.f);} LISP lgetc(LISP p) {int i; i = f_getc(get_c_file(p,stdin)); return((i == EOF) ? NIL : flocons((double)i));} LISP lungetc(LISP ii,LISP p) {int i; if NNULLP(ii) {i = get_c_long(ii); f_ungetc(i,get_c_file(p,stdin));} return(NIL);} LISP lputc(LISP c,LISP p) {long flag; int i; FILE *f; f = get_c_file(p,stdout); if FLONUMP(c) i = (int)FLONM(c); else i = *get_c_string(c); flag = no_interrupt(1); putc(i,f); no_interrupt(flag); return(NIL);} LISP lputs(LISP str,LISP p) {fput_st(get_c_file(p,stdout),get_c_string(str)); return(NIL);} LISP lftell(LISP file) {return(flocons((double)ftell(get_c_file(file,NULL))));} LISP lfseek(LISP file,LISP offset,LISP direction) {return((fseek(get_c_file(file,NULL),get_c_long(offset),get_c_long(direction))) ? NIL : sym_t);} LISP parse_number(LISP x) {char *c; c = get_c_string(x); return(flocons(atof(c)));} void __stdcall init_subrs(void) {init_subrs_1(); init_subrs_a();} LISP closure_code(LISP exp) {return(exp->storage_as.closure.code);} LISP closure_env(LISP exp) {return(exp->storage_as.closure.env);} LISP lwhile(LISP form,LISP env) {LISP l; while(NNULLP(leval(car(form),env))) for(l=cdr(form);NNULLP(l);l=cdr(l)) leval(car(l),env); return(NIL);} LISP nreverse(LISP x) {LISP newp,oldp,nextp; newp = NIL; for(oldp=x;CONSP(oldp);oldp=nextp) {nextp=CDR(oldp); CDR(oldp) = newp; newp = oldp;} return(newp);} LISP siod_verbose(LISP arg) {if NNULLP(arg) siod_verbose_level = get_c_long(car(arg)); return(flocons(siod_verbose_level));} int __stdcall siod_verbose_check(int level) {return((siod_verbose_level >= level) ? 1 : 0);} LISP lruntime(void) {return(cons(flocons(myruntime()), cons(flocons(gc_time_taken),NIL)));} LISP lrealtime(void) {return(flocons(myrealtime()));} LISP caar(LISP x) {return(car(car(x)));} LISP cadr(LISP x) {return(car(cdr(x)));} LISP cdar(LISP x) {return(cdr(car(x)));} LISP cddr(LISP x) {return(cdr(cdr(x)));} LISP lrand(LISP m) {long res; res = rand(); if NULLP(m) return(flocons(res)); else return(flocons(res % get_c_long(m)));} LISP lsrand(LISP s) {srand(get_c_long(s)); return(NIL);} LISP a_true_value(void) {return(sym_t);} LISP poparg(LISP *ptr,LISP defaultv) {LISP value; if NULLP(*ptr) return(defaultv); value = car(*ptr); *ptr = cdr(*ptr); return(value);} char *last_c_errmsg(int num) {int xerrno = (num < 0) ? errno : num; static char serrmsg[100]; char *errmsg; errmsg = strerror(xerrno); if (!errmsg) {sprintf(serrmsg,"errno %d",xerrno); errmsg = serrmsg;} return(errmsg);} LISP llast_c_errmsg(int num) {int xerrno = (num < 0) ? errno : num; char *errmsg = strerror(xerrno); if (!errmsg) return(flocons(xerrno)); return(cintern(errmsg));} LISP lllast_c_errmsg(void) {return(llast_c_errmsg(-1));} size_t safe_strlen(const char *s,size_t size) {char *end; if ((end = (char *)memchr(s,0,size))) return(end - s); else return(size);} char *safe_strcpy(char *s1,size_t size1,const char *s2) {size_t len2; if (size1 == 0) return(s1); len2 = strlen(s2); if (len2 < size1) {if (len2) memcpy(s1,s2,len2); s1[len2] = 0;} else {memcpy(s1,s2,size1); s1[size1-1] = 0;} return(s1);} char *safe_strcat(char *s1,size_t size1,const char *s2) {size_t len1; len1 = safe_strlen(s1,size1); safe_strcpy(&s1[len1],size1 - len1,s2); return(s1);} static LISP parser_read(LISP ignore) {return(leval(cintern("read"),NIL));} static LISP os_classification(void) { #ifdef unix return(cintern("unix")); #endif #ifdef WIN32 return(cintern("win32")); #endif #ifdef VMS return(cintern("vms")); #endif return(NIL);} void init_subrs_1(void) {init_subr_2("cons",cons); init_subr_1("car",car); init_subr_1("cdr",cdr); init_subr_2("set-car!",setcar); init_subr_2("set-cdr!",setcdr); init_subr_2n("+",plus); init_subr_2n("-",difference); init_subr_2n("*",ltimes); init_subr_2n("/",Quotient); init_subr_2n("min",lmin); init_subr_2n("max",lmax); init_subr_1("abs",lllabs); init_subr_1("sqrt",lsqrt); init_subr_2(">",greaterp); init_subr_2("<",lessp); init_subr_2(">=",greaterEp); init_subr_2("<=",lessEp); init_subr_2("eq?",eq); init_subr_2("eqv?",eql); init_subr_2("=",eql); init_subr_2("assq",assq); init_subr_2("delq",delq); init_subr_1("read",lread); init_subr_1("parser_read",parser_read); setvar(cintern("*parser_read.scm-loaded*"),sym_t,NIL); init_subr_0("eof-val",get_eof_val); init_subr_2("print",lprint); init_subr_2("prin1",lprin1); init_subr_2("eval",leval); init_subr_2("apply",lapply); init_fsubr("define",leval_define); init_fsubr("lambda",leval_lambda); init_msubr("if",leval_if); init_fsubr("while",leval_while); init_msubr("begin",leval_progn); init_fsubr("set!",leval_setq); init_msubr("or",leval_or); init_msubr("and",leval_and); init_fsubr("*catch",leval_catch); init_subr_2("*throw",lthrow); init_fsubr("quote",leval_quote); init_lsubr("apropos",apropos); init_lsubr("verbose",siod_verbose); init_subr_1("copy-list",copy_list); init_lsubr("gc-status",gc_status); init_lsubr("gc",user_gc); init_subr_3("load",load); init_subr_1("require",require); init_subr_1("pair?",consp); init_subr_1("symbol?",symbolp); init_subr_1("number?",numberp); init_msubr("let-internal",leval_let); init_subr_1("let-internal-macro",let_macro); init_subr_1("let*-macro",letstar_macro); init_subr_1("letrec-macro",letrec_macro); init_subr_2("symbol-bound?",symbol_boundp); init_subr_2("symbol-value",symbol_value); init_subr_3("set-symbol-value!",setvar); init_fsubr("the-environment",leval_tenv); init_subr_2("error",lerr); init_subr_0("quit",quit); init_subr_1("not",nullp); init_subr_1("null?",nullp); init_subr_2("env-lookup",envlookup); init_subr_1("reverse",reverse); init_lsubr("symbolconc",symbolconc); init_subr_3("save-forms",save_forms); init_subr_2("fopen",fopen_l); init_subr_1("fclose",fclose_l); init_subr_1("getc",lgetc); init_subr_2("ungetc",lungetc); init_subr_2("putc",lputc); init_subr_2("puts",lputs); init_subr_1("ftell",lftell); init_subr_3("fseek",lfseek); init_subr_1("parse-number",parse_number); init_subr_2("%%stack-limit",stack_limit); init_subr_1("intern",intern); init_subr_2("%%closure",closure); init_subr_1("%%closure-code",closure_code); init_subr_1("%%closure-env",closure_env); init_fsubr("while",lwhile); init_subr_1("nreverse",nreverse); init_subr_0("allocate-heap",allocate_aheap); init_subr_1("gc-info",gc_info); init_subr_0("runtime",lruntime); init_subr_0("realtime",lrealtime); init_subr_1("caar",caar); init_subr_1("cadr",cadr); init_subr_1("cdar",cdar); init_subr_1("cddr",cddr); init_subr_1("rand",lrand); init_subr_1("srand",lsrand); init_subr_0("last-c-error",lllast_c_errmsg); init_subr_0("os-classification",os_classification); init_slib_version();} /* err0,pr,prp are convenient to call from the C-language debugger */ void err0(void) {err("0",NIL);} void pr(LISP p) {if (looks_pointerp(p)) lprint(p,NIL); else put_st("invalid\n");} void prp(LISP *p) {if (!p) return; pr(*p);}