/****h* camelforth/forth.c * NAME * forth.c * DESCRIPTION * Interactive Forth interpreter written in C. * Allows C routines to be executed, and data to be examined, * from a command line interface. * NOTES * Ref. Norman E. Smith, "Write Your Own Programming Language * Using C++", although the implementation here is entirely * different. * AUTHOR * Brad Rodriguez * TODO * split ROM and RAM space * HISTORY * 12 dec 2017 bjr - released as v0.1 * 14 feb 2016 bjr - first implementation ****** * LICENSE TERMS * CamelForth in C * copyright (c) 2016,2017 Bradford J. Rodriguez. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see . * * Commercial inquiries should be directed to the author at * 115 First St., #105, Collingwood, Ontario L9Y 4W3 Canada * or via email to bj@camelforth.com */ #include #include #include "forth.h" /* * DATA STACKS * stacks grow downward to allow positive index from psp,rsp */ unsigned int pstack[PSTACKSIZE]; /* grows down from end */ unsigned int rstack[RSTACKSIZE]; /* grows down from end */ unsigned int *psp, *rsp; /* stack pointers */ void *ip; /* interpreter pointer */ bool run; /* "run" flag */ unsigned int lstack[LSTACKSIZE]; /* grows down from end */ unsigned int uservars[USERSIZE]; unsigned char tibarea[TIBSIZE]; unsigned char padarea[PADSIZE]; unsigned char holdarea[HOLDSIZE]; /* STUBS TBD */ unsigned char RAMDICT[8192]; unsigned char ROMDICT[1024]; #ifdef LINUX #include "linuxio.c" #endif #ifdef TIVA_C #include "tivaio.inc" #endif #define NULL 0 // wokwi and Uno R4 2 July 2023 /* * RUN-TIME FUNCTIONS FOR DEFINED WORDS */ void Fdocon (void * pfa) { *--psp = *(unsigned int *)pfa; } void Fdovar (void * pfa) { *--psp = *(unsigned int *)pfa; /* pf holds variable address */ } void Fdorom (void * pfa) { *--psp = (unsigned int)pfa; } void Fenter (void * pfa) { *--rsp = (unsigned int)ip; /* push old IP on return stack */ ip = pfa; /* IP points to thread */ } void Fdouser (void * pfa) { unsigned int i; i = *(unsigned int *)pfa; /* pf holds user var index */ *--psp = (unsigned int)(&uservars[i]); /* stack adrs of user var */ } /* CREATE to support FIG-Forth style DOES> * CREATE must reserve a two-cell code field, so that DOES> can later * be used. (See Fdobuilds, below. See also >BODY) * Defined (child) word is originally [Fdocreate] [don'tcare] [...data...] * which returns the address of 'data' (CFA + 2 cells). * DOES> will change child word to [Fdobuilds] [Tdoesword] [...data...] */ void Fdocreate (void * pfa) { *--psp = (unsigned int)pfa + CELL; } /* FIG-Forth style * Defined (child) word is [Fdobuilds] [Tdoesword] [...data...] * i.e., the second cell of the code field is the xt of the * Forth word to be executed, that implements the DOES> action */ void Fdobuilds (void * pfa) { void (*xt)(void *); /* pointer to code function */ void *w, *x; /* generic pointers */ w = *(void **)pfa; /* fetch word address from param field */ pfa += CELL; *--psp = (unsigned int)pfa; /* push address of following data */ x = *(void **)w; /* fetch function adrs from word def */ xt = (void (*)())x; /* too much casting! */ w += CELL; (*xt)(w); /* call function w/adrs of word def */ } /* * PRIMITIVE FUNCTIONS */ CODE(exit) { ip = (void *)(*rsp++); /* pop IP from return stack */ } CODE(execute) { void (*xt)(void *); /* pointer to code function */ void *w, *x; /* generic pointers */ w = *(void **)psp; /* fetch word address from stack */ psp++; x = *(void **)w; /* fetch function adrs from word def */ xt = (void (*)())x; /* too much casting! */ w += CELL; (*xt)(w); /* call function w/adrs of word def */ } CODE(lit) { *--psp = *(unsigned int*)ip; /* fetch inline value */ ip += CELL; } /* STACK OPERATIONS */ CODE(dup) { --psp; psp[0] = psp[1]; } CODE(qdup) { if (*psp != 0) { --psp; psp[0] = psp[1]; } } CODE(drop) { psp++; } CODE(swap) { unsigned int x; x = psp[1]; psp[1] = psp[0]; psp[0] = x; } CODE(over) { --psp; psp[0] = psp[2]; } CODE(rot) { unsigned int x; x = psp[2]; psp[2] = psp[1]; psp[1] = psp[0]; psp[0] = x; } CODE(nip) { // x1 x2 -- x2 psp[1] = psp[0]; psp++; } CODE(tuck) { // x1 x2 -- x2 x1 x2 unsigned int x; --psp; x = psp[2]; // x1 psp[2] = psp[0] = psp[1]; // x2 psp[1] = x; } CODE(tor) { *--rsp = *psp++; } CODE(rfrom) { *--psp = *rsp++; } CODE(rfetch) { *--psp = *rsp; } CODE(spfetch) { unsigned int temp; temp = (unsigned int)psp; /* circumvent weird optimization */ *--psp = temp; } CODE(spstore) { psp = (unsigned int *)(*psp); /* do not use *psp++ */ } CODE(rpfetch) { *--psp = (unsigned int)rsp; } CODE(rpstore) { rsp = (unsigned int *)(*psp++); } /* MEMORY OPERATIONS */ CODE(fetch) { unsigned int *ptr; ptr = (unsigned int*) psp[0]; psp[0] = *ptr; } CODE(store) { unsigned int *ptr; ptr = (unsigned int*)(*psp++); *ptr = *psp++; } CODE(cfetch) { unsigned char *ptr; ptr = (unsigned char*) psp[0]; psp[0] = (unsigned int)(*ptr); } CODE(cstore) { unsigned char *ptr; ptr = (unsigned char*)(*psp++); *ptr = (unsigned char)(*psp++); } /* ARITHMETIC AND LOGIC OPERATIONS */ CODE(plus) { psp[1] += psp[0]; psp++; } CODE(plusstore) { unsigned int *ptr; ptr = (unsigned int*)(*psp++); *ptr += *psp++; } CODE(mplus) { uint64_t d; unsigned int n; n = *psp++; /* enforce Forth word order, high on top */ d = (((uint64_t)psp[0]) << CELLWIDTH) + psp[1]; d += n; psp[0] = (unsigned int)(d >> CELLWIDTH); psp[1] = d & CELLMASK; } CODE(minus) { psp[1] -= psp[0]; psp++; } CODE(mult) { signed int r; r = (signed int)psp[1] * (signed int)psp[0]; psp++; psp[0] = (unsigned int)r; } CODE(div) { signed int r; r = (signed int)psp[1] / (signed int)psp[0]; psp++; psp[0] = (unsigned int)r; } CODE(and) { psp[1] &= psp[0]; psp++; } CODE(or) { psp[1] |= psp[0]; psp++; } CODE(xor) { psp[1] ^= psp[0]; psp++; } CODE(invert) { *psp ^= CELLMASK; } CODE(negate) { *psp = -(*psp); } CODE(oneplus) { *psp += 1; } CODE(oneminus) { *psp -= 1; } CODE(swapbytes) { unsigned int u; u = *psp; *psp = ((u & 0xff) << 8) | ((u & 0xff00) >> 8); } CODE(twostar) { *psp = (*psp) << 1; } CODE(twoslash) { signed int n; n = (signed int)(*psp); *psp = (unsigned int)(n >> 1); } CODE(lshift) { unsigned int u; u = *psp++; *psp = (*psp) << u; } CODE(rshift) { unsigned int u; u = *psp++; *psp = (*psp) >> u; } /* COMPARISONS */ CODE(zeroequal) { psp[0] = (psp[0] == 0) ? -1 : 0; } CODE(zeroless) { psp[0] = ((signed int)(psp[0]) < 0) ? -1 : 0; } CODE(equal) { psp[1] = (psp[1] == psp[0]) ? -1 : 0; psp++; } CODE(notequal) { psp[1] = (psp[1] != psp[0]) ? -1 : 0; psp++; } CODE(less) { psp[1] = ((signed int)(psp[1]) < (signed int)(psp[0])) ? -1 : 0; psp++; } CODE(greater) { psp[1] = ((signed int)(psp[1]) > (signed int)(psp[0])) ? -1 : 0; psp++; } CODE(uless) { psp[1] = (psp[1] < psp[0]) ? -1 : 0; psp++; } CODE(ugreater) { psp[1] = (psp[1] > psp[0]) ? -1 : 0; psp++; } /* BRANCH AND LOOP */ CODE(branch) { /* Tbranch,-4 loops back to itself */ int offset; /* Tbranch,+4 is a no-op */ offset = *(unsigned int*)ip; /* fetch inline offset */ ip += offset; } CODE(qbranch) { /* Tbranch,-4 loops back to itself */ int offset; if (*psp++ == 0) { offset = *(unsigned int*)ip; /* fetch inline offset */ ip += offset; } else { ip += CELL; } } /* '83 and ANSI standard +LOOP behavior: (per dpans-6) * "Add n to the loop index. If the loop index did not cross the boundary * between the loop limit minus one and the loop limit, continue execution * at the beginning of the loop. Otherwise, discard the current loop * control parameters and continue execution immediately following the * loop." * rsp[0] = index, rsp[1] = limit */ /* circular comparison of two unsigned ints, returns true if x>=y */ #define CIRCULARGE(x,y) ((signed int)(x-y) >= 0) CODE(xplusloop) { /* n -- */ int offset; bool f; f = CIRCULARGE(rsp[0],rsp[1]); // circular compare index:limit rsp[0] += *psp++; // add n to index if (CIRCULARGE(rsp[0],rsp[1]) != f) { // have we crossed the boundary? rsp += 2; // yes: drop index, limit ip += CELL; // and exit loop } else { offset = *(unsigned int*)ip; // no: branch ip += offset; } } CODE(xloop) { int offset; rsp[0] += 1; // add 1 to index if (rsp[0] == rsp[1]) { // have we reached the limit? rsp += 2; // yes: drop index, limit ip += CELL; // and exit loop } else { offset = *(unsigned int*)ip; // no: branch ip += offset; } } CODE(xdo) { /* limit start -- */ *--rsp = psp[1]; // push limit *--rsp = *psp++; // push starting index psp++; } CODE(i) { *--psp = rsp[0]; // first loop index } CODE(j) { *--psp = rsp[2]; // second loop index } CODE(unloop) { rsp += 2; } /* MULTIPLY AND DIVIDE */ CODE(umstar) { /* u1 u2 -- ud */ uint64_t ud; ud = (uint64_t)psp[0] * (uint64_t)psp[1]; psp[1] = ud & (uint64_t)0xffffffff; psp[0] = ud >> 32; } CODE(umslashmod) { /* ud u1 -- rem quot */ uint64_t ud, u1; u1 = *psp++; ud = ((uint64_t)psp[0] << 32) | (uint64_t)psp[1]; psp[1] = (unsigned int)(ud % u1); psp[0] = (unsigned int)(ud / u1); } /* BLOCK AND STRING OPERATIONS */ CODE(fill) { /* c-addr u char -- */ unsigned char c, *dst; unsigned int u; c = (unsigned char)*psp++; u = *psp++; dst = (unsigned char *)*psp++; while (u-- > 0) *dst++ = c; } CODE(cmove) { /* src dst u -- */ unsigned char *dst, *src; unsigned int u; u = *psp++; dst = (unsigned char *)*psp++; src = (unsigned char *)*psp++; while (u-- > 0) *dst++ = *src++; } CODE(cmoveup) { /* src dst u -- */ unsigned char *dst, *src; unsigned int u; u = *psp++; dst = (unsigned char *)(u + *psp++); src = (unsigned char *)(u + *psp++); while (u-- > 0) *--dst = *--src; } CODE(skip) { /* c-addr u c -- c-addr' u' */ unsigned char c, *src; unsigned int u; c = (unsigned char)*psp++; u = *psp++; src = (unsigned char *)*psp++; while ((u > 0) && (c == *src)) { src++; u--; } *--psp = (unsigned int)src; *--psp = u; } CODE(scan) { /* c-addr u c -- c-addr' u' */ unsigned char c, *src; unsigned int u; c = (unsigned char)*psp++; u = *psp++; src = (unsigned char *)*psp++; while ((u > 0) && (c != *src)) { src++; u--; } *--psp = (unsigned int)src; *--psp = u; } CODE(sequal) { /* c-addr1 c-addr2 u -- n */ unsigned char *dst, *src; unsigned int u; int result = 0; u = *psp++; dst = (unsigned char *)*psp++; src = (unsigned char *)*psp++; while ((u-- > 0) & (result == 0)) { if (*dst != *src) { if (*dst > *src) result = 1; else if (*dst < *src) result = -1; } dst++; src++; } *--psp = (unsigned int)result; } /* TERMINAL I/O */ CODE(key) { *--psp = (unsigned int)getch(); } extern void putch(char c); /* CODE(emit) { putch((char)*psp++); } */ CODE(emit) { printf("%c", *psp++); // putch((char)*psp++); } CODE(keyq) { *--psp = getquery(); } CODE(dot) { /* temporary definition for testing */ printf(" %d", *psp++); } CODE(dothh) { /* temporary definition for testing */ printf(" %2x", *psp++); } CODE(dothhhh) { /* temporary definition for testing */ printf(" %8x", *psp++); } CODE(dots) { /* print stack, for testing */ unsigned int *p; p = &pstack[PSTACKSIZE-2]; /* deepest element on stack */ printf("\n%8x:", (unsigned int)p); while (p >= psp) printf(" %8x", *p--); } CODE(dump) { /* adr n -- */ unsigned char *p; unsigned int n, i; n = *psp++; p = (unsigned char *)*psp++; for (i=0; iin base state RAMDICT, LIT(0), LIT(0), Hcold.nfa, // dp source latest LIT(0), LIT(0), ROMDICT, LIT(0) }; // hp lp idp newest THREAD(ninit) = { Fdocon, LIT(16*CELL) }; /* CONSTANTS and some system variables */ THREAD(pad) = { Fdocon, padarea }; THREAD(l0) = { Fdocon, &lstack[LSTACKSIZE-1] }; THREAD(s0) = { Fdocon, &pstack[PSTACKSIZE-1] }; THREAD(r0) = { Fdocon, &rstack[RSTACKSIZE-1] }; THREAD(tib) = { Fdocon, tibarea }; THREAD(tibsize) = { Fdocon, LIT(TIBSIZE) }; THREAD(bl) = { Fdocon, LIT(0x20) }; THREAD(zero) = { Fdocon, LIT(0) }; THREAD(one) = { Fdocon, LIT(1) }; THREAD(two) = { Fdocon, LIT(2) }; THREAD(three) = { Fdocon, LIT(3) }; THREAD(minusone) = { Fdocon, LIT(-1) }; /* TO BE SUPPLIED */ #define TBD(name) const void * T##name[] = { Fenter, Texit } /* CPU DEPENDENCIES */ THREAD(cell) = { Fdocon, LIT(CELL) }; THREAD(chars) = { Fenter, Texit }; /* no operation */ /* DICTIONARY MANAGEMENT */ THREAD(here) = { Fenter, Tdp, Tfetch, Texit }; THREAD(allot) = { Fenter, Tdp, Tplusstore, Texit }; THREAD(comma) = { Fenter, There, Tstore, Tcell, Tallot, Texit }; THREAD(ccomma) = { Fenter, There, Tcstore, Tone, Tchars, Tallot, Texit }; /* synonyms for unified code and data space */ #define Tidp Tdp #define Tihere There #define Tiallot Tallot #define Ticomma Tcomma #define Ticcomma Tccomma /* synonyms for unified header and data space */ #define Thhere There #define Thallot Tallot #define Thcomma Tcomma #define Thccomma Tccomma #define Thword Tword /* CPU DEPENDENCIES */ /* cell alignment */ THREAD(aligned) = { Fenter, Tcell, Tover, Tminus, Tcell, Toneminus, Tand, Tplus, Texit }; THREAD(align) = { Fenter, Tihere, Taligned, Tidp, Tstore, Texit }; THREAD(cellplus) = { Fenter, Tcell, Tplus, Texit }; THREAD(charplus) = { Fenter, Tone, Tplus, Texit }; /* >BODY is entered with CFA on stack. For most words, body is * CFA + 1 cell. For words built with CREATE or CREATE..DOES> , * body is CFA + 2 cells. */ THREAD(tobody) = { Fenter, Tdup, Tifetch, /* fetch code field */ Tdup, Tlit, Fdocreate, Tequal, /* if it's Fdocreate */ Tswap, Tlit, Fdobuilds, Tequal, Tor, /* or Fdobuilds */ Tqbranch, OFFSET(3), Tcell, Tplus, /* then add an extra cell */ Tcell, Tplus, Texit }; THREAD(commaxt) = { Fenter, Ticomma, Texit }; THREAD(storecf) = { Fenter, Tistore, Texit }; THREAD(commacf) = { Fenter, Tihere, Tstorecf, Tcell, Tiallot, Texit }; THREAD(commaexit) = { Fenter, Tlit, Texit, Tcommaxt, Texit }; /* the c model uses relative addressing from the location of the * offset cell */ THREAD(commabranch) = { Fenter, Ticomma, Texit }; THREAD(commadest) = { Fenter, Tihere, Tminus, Ticomma, Texit }; THREAD(storedest) = { Fenter, Ttuck, Tminus, Tswap, Tistore, Texit }; THREAD(commanone) = { Fenter, Tcell, Tiallot, Texit }; /* DOUBLE OPERATORS */ THREAD(twofetch) = { Fenter, Tdup, Tcellplus, Tfetch, Tswap, Tfetch, Texit }; THREAD(twostore) = { Fenter, Tswap, Tover, Tstore, Tcellplus, Tstore, Texit }; THREAD(twodrop) = { Fenter, Tdrop, Tdrop, Texit }; THREAD(twodup) = { Fenter, Tover, Tover, Texit }; THREAD(twoswap) = { Fenter, Trot, Ttor, Trot, Trfrom, Texit }; THREAD(twoover) = { Fenter, Ttor, Ttor, Ttwodup, Trfrom, Trfrom, Ttwoswap, Texit }; /* ARITHMETIC OPERATORS */ THREAD(stod) = { Fenter, Tdup, Tzeroless, Texit }; THREAD(qnegate) = { Fenter, Tzeroless, Tqbranch, OFFSET(2), Tnegate, Texit }; THREAD(abs) = { Fenter, Tdup, Tqnegate, Texit }; THREAD(dnegate) = { Fenter, Tswap, Tinvert, Tswap, Tinvert, Tone, Tmplus, Texit }; THREAD(qdnegate) = { Fenter, Tzeroless, Tqbranch, OFFSET(2), Tdnegate, Texit }; THREAD(dabs) = { Fenter, Tdup, Tqdnegate, Texit }; THREAD(mstar) = { Fenter, Ttwodup, Txor, Ttor, Tswap, Tabs, Tswap, Tabs, Tumstar, Trfrom, Tqdnegate, Texit }; THREAD(smslashrem) = { Fenter, Ttwodup, Txor, Ttor, Tover, Ttor, Tabs, Ttor, Tdabs, Trfrom, Tumslashmod, Tswap, Trfrom, Tqnegate, Tswap, Trfrom, Tqnegate, Texit }; THREAD(fmslashmod) = { Fenter, Tdup, Ttor, Ttwodup, Txor, Ttor, Ttor, Tdabs, Trfetch, Tabs, Tumslashmod, Tswap, Trfrom, Tqnegate, Tswap, Trfrom, Tzeroless, Tqbranch, OFFSET(10), Tnegate, Tover, Tqbranch, OFFSET(6), Trfetch, Trot, Tminus, Tswap, Toneminus, /* branch dest */ Trfrom, Tdrop, Texit }; THREAD(star) = { Fenter, Tmstar, Tdrop, Texit }; THREAD(slashmod) = { Fenter, Ttor, Tstod, Trfrom, Tfmslashmod, Texit }; THREAD(slash) = { Fenter, Tslashmod, Tnip, Texit }; THREAD(mod) = { Fenter, Tslashmod, Tdrop, Texit }; THREAD(starslashmod) = { Fenter, Ttor, Tmstar, Trfrom, Tfmslashmod, Texit }; THREAD(starslash) = { Fenter, Tstarslashmod, Tnip, Texit }; THREAD(max) = { Fenter, Ttwodup, Tless, Tqbranch, OFFSET(2), Tswap, Tdrop, Texit }; THREAD(min) = { Fenter, Ttwodup, Tgreater, Tqbranch, OFFSET(2), Tswap, Tdrop, Texit }; THREAD(umax) = { Fenter, Ttwodup, Tuless, Tqbranch, OFFSET(2), Tswap, Tdrop, Texit }; THREAD(umin) = { Fenter, Ttwodup, Tugreater, Tqbranch, OFFSET(2), Tswap, Tdrop, Texit }; /* CPU DEPENDENCIES CONT'D. */ THREAD(cells) = { Fenter, Tcell, Tstar, Texit }; THREAD(storecolon) = { Fenter, Ttwo, Tcells, Tnegate, Tiallot, Tlit, Fenter, Tcommacf, Texit }; /* INPUT/OUTPUT */ THREAD(count) = { Fenter, Tdup, Tcharplus, Tswap, Tcfetch, Texit }; THREAD(cr) = { Fenter, Tlit, LIT(0x0d), Temit, Tlit, LIT(0x0a), Temit, Texit }; THREAD(space) = { Fenter, Tlit, LIT(0x20), Temit, Texit }; THREAD(spaces) = { Fenter, Tdup, Tqbranch, OFFSET(5), Tspace, Toneminus, Tbranch, OFFSET(-6), Tdrop, Texit }; #ifdef LINUX #define NEWLINE 0x0a #define BACKSPACE 0x7f /* key returned for backspace */ #define BACKUP 8 /* what to emit for backspace */ #else #define NEWLINE 0x0a /* NEWLINE 0x0d */ #define BACKSPACE 8 /* key returned for backspace */ #define BACKUP 8 /* what to emit for backspace */ #endif THREAD(accept) = { Fenter, Tover, Tplus, Toneminus, Tover, /* 1 */ Tkey, Tdup, Tlit, LIT(NEWLINE), Tnotequal, Tqbranch, OFFSET(27 /*5*/), Tdup, Tlit, LIT(BACKSPACE), Tequal, Tqbranch, OFFSET(12 /*3*/), Tdrop, Tlit, LIT(BACKUP), Temit, Toneminus, Ttor, Tover, Trfrom, Tumax, Tbranch, OFFSET(8 /*4*/), /* 3 */ Tdup, Temit, Tover, Tcstore, Toneplus, Tover, Tumin, /* 4 */ Tbranch, OFFSET(-32 /*1*/), /* 5 */ Tdrop, Tnip, Tswap, Tminus, Texit }; THREAD(type) = { Fenter, Tqdup, Tqbranch, OFFSET(12 /*4*/), Tover, Tplus, Tswap, Txdo, /* 3 */ Ti, Tcfetch, Temit, Txloop, OFFSET(-4 /*3*/), Tbranch, OFFSET(2 /*5*/), /* 4 */ Tdrop, /* 5 */ Texit }; #define Ticount Tcount #define Titype Ttype /* NUMERIC OUTPUT */ THREAD(udslashmod) = { Fenter, Ttor, Tzero, Trfetch, Tumslashmod, Trot, Trot, Trfrom, Tumslashmod, Trot, Texit }; THREAD(udstar) = { Fenter, Tdup, Ttor, Tumstar, Tdrop, Tswap, Trfrom, Tumstar, Trot, Tplus, Texit }; THREAD(hold) = { Fenter, Tminusone, Thp, Tplusstore, Thp, Tfetch, Tcstore, Texit }; THREAD(lessnum) = { Fenter, Tlit, &holdarea[HOLDSIZE-1], Thp, Tstore, Texit }; THREAD(todigit) = { Fenter, Tdup, Tlit, LIT(9), Tgreater, Tlit, LIT(7), Tand, Tplus, Tlit, LIT(0x30), Tplus, Texit }; THREAD(num) = { Fenter, Tbase, Tfetch, Tudslashmod, Trot, Ttodigit, Thold, Texit }; THREAD(nums) = { Fenter, Tnum, Ttwodup, Tor, Tzeroequal, Tqbranch, OFFSET(-5), Texit }; THREAD(numgreater) = { Fenter, Ttwodrop, Thp, Tfetch, Tlit, &holdarea[HOLDSIZE-1], Tover, Tminus, Texit }; THREAD(sign) = { Fenter, Tzeroless, Tqbranch, OFFSET(4), Tlit, LIT(0x2d), Thold, Texit }; THREAD(udot) = { Fenter, Tlessnum, Tzero, Tnums, Tnumgreater, Ttype, Tspace, Texit }; THREAD(dot) = { Fenter, Tlessnum, Tdup, Tabs, Tzero, Tnums, Trot, Tsign, Tnumgreater, Ttype, Tspace, Texit }; THREAD(decimal) = { Fenter, Tlit, LIT(10), Tbase, Tstore, Texit }; THREAD(hex) = { Fenter, Tlit, LIT(16), Tbase, Tstore, Texit }; /* INTERPRETER */ THREAD(source) = { Fenter, Tticksource, Ttwofetch, Texit }; THREAD(slashstring) = { Fenter, Trot, Tover, Tplus, Trot, Trot, Tminus, Texit }; THREAD(tocounted) = { Fenter, Ttwodup, Tcstore, Tcharplus, Tswap, Tcmove, Texit }; THREAD(adrtoin) = { Fenter, Tsource, Trot, Trot, Tminus, Tmin, Tzero, Tmax, Ttoin, Tstore, Texit }; THREAD(parse) = { Fenter, Tsource, Ttoin, Tfetch, Tslashstring, Tover, Ttor, Trot, Tscan, Tover, Tswap, Tqbranch, OFFSET(2), Tcharplus, Tadrtoin, Trfrom, Ttuck, Tminus, Texit }; THREAD(word) = { Fenter, Tdup, Tsource, Ttoin, Tfetch, Tslashstring, Trot, Tskip, Tdrop, Tadrtoin, Tparse, There, Ttocounted, There, Tbl, Tover, Tcount, Tplus, Tcstore, Texit }; /* (S") S" ." for unified code/data space */ THREAD(xsquote) = { Fenter, Trfrom, Tcount, Ttwodup, Tplus, Taligned, Ttor, Texit }; THREAD(squote) = { Fenter, Tlit, Txsquote, Tcommaxt, Tlit, LIT(0x22), Tword, Tcfetch, Toneplus, Taligned, Tallot, Texit }; #define Txisquote Txsquote #define Tisquote Tsquote THREAD(dotquote) = { Fenter, Tsquote, Tlit, Ttype, Tcommaxt, Texit }; /* Dictionary header [sizes in bytes]: * link[4], cfa[4], flags[1], name[n] * Note that link is to the previous name field. */ // THREAD(lfatonfa) = { Fenter, Tlit, LIT(CELL*2 + 1), Tplus, Texit }; THREAD(nfatolfa) = { Fenter, Tlit, LIT(CELL*2 + 1), Tminus, Texit }; // THREAD(lfatocfa) = { Fenter, Tcell, Tplus, Thfetch, Texit }; THREAD(nfatocfa) = { Fenter, Tlit, LIT(CELL+1), Tminus, Thfetch, Texit }; THREAD(immedq) = { Fenter, Toneminus, Thcfetch, Tone, Tand, Texit }; THREAD(find) = { Fenter, Tlatest, Tfetch, /*1*/ Ttwodup, Tover, Tcfetch, Tcharplus, Tnequal, Tdup, Tqbranch, OFFSET(5 /*2*/), Tdrop, Tnfatolfa, Thfetch, Tdup, /*2*/ Tzeroequal, Tqbranch, OFFSET(-14 /*1*/), Tdup, Tqbranch, OFFSET(9 /*3*/), Tnip, Tdup, Tnfatocfa, Tswap, Timmedq, Tzeroequal, Tone, Tor, /*3*/ Texit }; THREAD(literal) = { Fenter, Tstate, Tfetch, Tqbranch, OFFSET(5), Tlit, Tlit, Tcommaxt, Ticomma, Texit }; THREAD(digitq) = { Fenter, Tdup, Tlit, LIT(0x39), Tgreater, Tlit, LIT(0x100), Tand, Tplus, Tdup, Tlit, LIT(0x140), Tgreater, Tlit, LIT(0x107), Tand, Tminus, Tlit, LIT(0x30), Tminus, Tdup, Tbase, Tfetch, Tuless, Texit }; THREAD(qsign) = { Fenter, Tover, Tcfetch, Tlit, LIT(0x2c), Tminus, Tdup, Tabs, Tone, Tequal, Tand, Tdup, Tqbranch, OFFSET(6), Toneplus, Ttor, Tone, Tslashstring, Trfrom, Texit }; THREAD(tonumber) = { Fenter, /*1*/ Tdup, Tqbranch, OFFSET(21 /*3*/), Tover, Tcfetch, Tdigitq, Tzeroequal, Tqbranch, OFFSET (3 /*2*/), Tdrop, Texit, /*2*/ Ttor, Ttwoswap, Tbase, Tfetch, Tudstar, Trfrom, Tmplus, Ttwoswap, Tone, Tslashstring, Tbranch, OFFSET (-22 /*1*/), /*3*/ Texit }; THREAD(qnumber) = { Fenter, Tdup, Tzero, Tdup, Trot, Tcount, Tqsign, Ttor, Ttonumber, Tqbranch, OFFSET(7 /*1*/), Trfrom, Ttwodrop, Ttwodrop, Tzero, Tbranch, OFFSET(8 /*3*/), /*1*/ Ttwodrop, Tnip, Trfrom, Tqbranch, OFFSET(2 /*2*/), Tnegate, /*2*/ Tminusone, /*3*/ Texit }; extern const void * Tabort[]; /* forward reference */ THREAD(interpret) = { Fenter, Tticksource, Ttwostore, Tzero, Ttoin, Tstore, /*1*/ Tbl, Tword, Tdup, Tcfetch, Tqbranch, OFFSET(33 /*9*/), Tfind, Tqdup, Tqbranch, OFFSET(14 /*4*/), Toneplus, Tstate, Tfetch, Tzeroequal, Tor, Tqbranch, OFFSET(4 /*2*/), Texecute, Tbranch, OFFSET(2 /*3*/), /*2*/ Tcommaxt, /*3*/ Tbranch, OFFSET(14 /*8*/), /*4*/ Tqnumber, Tqbranch, OFFSET(4 /*5*/), Tliteral, Tbranch, OFFSET(8 /*6*/), /*5*/ Tcount, Ttype, Tlit, LIT(0x3f), Temit, Tcr, Tabort, /*6*/ /*8*/ Tbranch, OFFSET(-37 /*1*/), /*9*/ Tdrop, Texit }; THREAD(evaluate) = { Fenter, Tticksource, Ttwofetch, Ttor, Ttor, Ttoin, Tfetch, Ttor, Tinterpret, Trfrom, Ttoin, Tstore, Trfrom, Trfrom, Tticksource, Ttwostore, Texit }; const char okprompt[] = "\003ok "; THREAD(quit) = { Fenter, Tl0, Tlp, Tstore, Tr0, Trpstore, Tzero, Tstate, Tstore, /*1*/ Ttib, Tdup, Ttibsize, Taccept, Tspace, Tinterpret, Tcr, Tstate, Tfetch, Tzeroequal, Tqbranch, OFFSET(5 /*2*/), Tlit, okprompt, Ticount, Titype, /*2*/ Tbranch, OFFSET(-17 /*1*/) }; // never exits THREAD(abort) = { Fenter, Ts0, Tspstore, Tquit }; THREAD(qabort) = { Fenter, Trot, Tqbranch, OFFSET(3), Titype, Tabort, Ttwodrop, Texit }; THREAD(abortquote) = { Fenter, Tisquote, Tlit, Tqabort, Tcommaxt, Texit }; const char huhprompt[] = "\001?"; THREAD(tick) = { Fenter, Tbl, Tword, Tfind, Tzeroequal, Tlit, huhprompt, Ticount, Tqabort, Texit }; /* COMPILER */ THREAD(char) = { Fenter, Tbl, Tword, Toneplus, Tcfetch, Texit }; THREAD(bracchar) = { Fenter, Tchar, Tlit, Tlit, Tcommaxt, Ticomma, Texit }; THREAD(paren) = { Fenter, Tlit, LIT(0x29), Tparse, Ttwodrop, Texit }; /* header is { link-to-nfa, cfa, flags, name } where default cfa, * in unified memory space, is immediately following header */ THREAD(header) = { Fenter, Tlatest, Tfetch, Thcomma, /* link */ Thhere, Tcell, Thallot, /* reserve cell for cfa */ Tzero, Thccomma, /* flags byte */ Thhere, Tlatest, Tstore, /* new latest = nfa */ Tbl, Thword, Thcfetch, Toneplus, Thallot, /* name field */ Talign, Tihere, Tswap, Thstore, Texit }; /* patch cfa cell */ /* defined word is { Fdobuilds, Tdoesword, ... } * Fdobuilds is installed by DOES> so we can use CREATE or code.... } * \--headless Forth word--/ */ THREAD(xdoes) = { Fenter, Trfrom, /* xt of headless doesword */ Tlatest, Tfetch, Tnfatocfa, /* cfa of word being built */ Tlit, Fdobuilds, Tover, Tstorecf, /* first cell: Fdobuilds */ Tcellplus, Tistore, /* second cell: xt of doesword */ Texit }; THREAD(does) = { Fenter, Tlit, Txdoes, Tcommaxt, Tlit, Fenter, Ticomma, Texit }; THREAD(recurse) = { Fenter, Tnewest, Tfetch, Tnfatocfa, Tcommaxt, Texit }; THREAD(leftbracket) = { Fenter, Tzero, Tstate, Tstore, Texit }; THREAD(rightbracket) = { Fenter, Tminusone, Tstate, Tstore, Texit }; THREAD(hide) = { Fenter, Tlatest, Tfetch, Tdup, Tnewest, Tstore, Tnfatolfa, Thfetch, Tlatest, Tstore, Texit }; THREAD(reveal) = { Fenter, Tnewest, Tfetch, Tlatest, Tstore, Texit }; THREAD(immediate) = { Fenter, Tone, Tlatest, Tfetch, Tone, Tchars, Tminus, Thcstore, Texit }; THREAD(colon) = { Fenter, Tbuilds, Thide, Trightbracket, Tstorecolon, Texit }; THREAD(semicolon) = { Fenter, Treveal, Tcommaexit, Tleftbracket, Texit }; THREAD(brackettick) = { Fenter, Ttick, Tlit, Tlit, Tcommaxt, Ticomma, Texit }; THREAD(postpone) = { Fenter, Tbl, Tword, Tfind, Tdup, Tzeroequal, Tlit, huhprompt, Ticount, Tqabort, Tzeroless, Tqbranch, OFFSET(10), Tlit, Tlit, Tcommaxt, Ticomma, Tlit, Tcommaxt, Tcommaxt, Tbranch, OFFSET(2), Tcommaxt, Texit }; THREAD(compile) = { Fenter, Trfrom, Tdup, Tcellplus, Ttor, Tifetch, Tcommaxt, Texit }; /* CONTROL STRUCTURES */ THREAD(if) = { Fenter, Tlit, Tqbranch, Tcommabranch, Tihere, Tcommanone, Texit }; THREAD(then) = { Fenter, Tihere, Tswap, Tstoredest, Texit }; THREAD(else) = { Fenter, Tlit, Tbranch, Tcommabranch, Tihere, Tcommanone, Tswap, Tthen, Texit }; THREAD(begin) = { Fenter, Tihere, Texit }; THREAD(until) = { Fenter, Tlit, Tqbranch, Tcommabranch, Tcommadest, Texit }; THREAD(again) = { Fenter, Tlit, Tbranch, Tcommabranch, Tcommadest, Texit }; THREAD(while) = { Fenter, Tif, Tswap, Texit }; THREAD(repeat) = { Fenter, Tagain, Tthen, Texit }; THREAD(tol) = { Fenter, Tcell, Tlp, Tplusstore, Tlp, Tfetch, Tstore, Texit }; THREAD(lfrom) = { Fenter, Tlp, Tfetch, Tfetch, Tcell, Tnegate, Tlp, Tplusstore, Texit }; THREAD(do) = { Fenter, Tlit, Txdo, Tcommaxt, Tihere, Tzero, Ttol, Texit }; THREAD(endloop) = { Fenter, Tcommabranch, Tcommadest, Tlfrom, Tqdup, Tqbranch, OFFSET(4), Tthen, Tbranch, OFFSET(-6), Texit }; THREAD(loop) = { Fenter, Tlit, Txloop, Tendloop, Texit }; THREAD(plusloop) = { Fenter, Tlit, Txplusloop, Tendloop, Texit }; THREAD(leave) = { Fenter, Tlit, Tunloop, Tcommaxt, Tlit, Tbranch, Tcommabranch, Tihere, Tcommanone, Ttol, Texit }; /* OTHER OPERATIONS */ THREAD(within) = { Fenter, Tover, Tminus, Ttor, Tminus, Trfrom, Tuless, Texit }; THREAD(move) = { Fenter, Ttor, Ttwodup, Tswap, Tdup, Trfetch, Tplus, Twithin, Tqbranch, OFFSET(5), Trfrom, Tcmoveup, Tbranch, OFFSET(3), Trfrom, Tcmove, Texit }; THREAD(depth) = { Fenter, Tspfetch, Ts0, Tswap, Tminus, Tcell, Tslash, Texit }; THREAD(environmentq) = { Fenter, Ttwodrop, Tzero, Texit }; /* THREAD() = { Fenter, Texit }; THREAD() = { Fenter, Texit }; THREAD() = { Fenter, Texit }; */ /* UTILITY WORDS */ THREAD(marker) = { Fenter, Tlatest, Tfetch, Tihere, There, Tbuilds, Ticomma, Ticomma, Ticomma, Txdoes, /* DOES> action as a headerless Forth word */ Fenter, Tdup, Tifetch, Tswap, Tcellplus, Tdup, Tifetch, Tswap, Tcellplus, Tifetch, Tlatest, Tstore, Tidp, Tstore, Tdp, Tstore, Texit }; #define Thcount Tcount #define Thtype Ttype THREAD(words) = { Fenter, Tlatest, Tfetch, /*1*/ Tdup, Thcount, Tlit, LIT(0x7f), Tand, Thtype, Tspace, Tnfatolfa, Thfetch, Tdup, Tzeroequal, Tqbranch, OFFSET(-12), Tdrop, Texit, }; /* MAIN ENTRY POINT */ const char coldprompt[] = "\042CamelForth in C v0.1 - 14 Feb 2016"; THREAD(cold) = { Fenter, Tuinit, Tu0, Tninit, Titod, /* important initialization! */ Tlit, coldprompt, Tcount, Ttype, Tcr, Tabort, }; /* Tabort never exits */ /* * INNER INTERPRETER */ #include /* TODO move this upwards */ void interpreter(void) { void (*xt)(void *); /* pointer to code function */ void *w, *x; /* generic pointers */ psp = &pstack[PSTACKSIZE-1]; rsp = &rstack[RSTACKSIZE-1]; ip = &Tcold; ip += CELL; run = 1; /* set to zero to terminate interpreter */ while (run) { w = *(void **)ip; /* fetch word address from thread */ ip += CELL; x = *(void **)w; /* fetch function adrs from word def */ xt = (void (*)())x; /* too much casting! */ w += CELL; (*xt)(w); /* call function w/adrs of word def */ } } /* * DICTIONARY HEADERS */ /* first header must be explicitly spelled out for null link */ const struct Header Hexit = { NULL, Texit, 0, "\004EXIT" }; HEADER(execute, exit, 0, "\007EXECUTE"); HEADER(lit, execute, 0, "\003lit"); HEADER(dup, lit, 0, "\003DUP"); HEADER(qdup, dup, 0, "\004?DUP"); HEADER(drop, qdup, 0, "\004DROP"); HEADER(swap, drop, 0, "\004SWAP"); HEADER(over, swap, 0, "\004OVER"); HEADER(rot, over, 0, "\003ROT"); HEADER(nip, rot, 0, "\003NIP"); HEADER(tuck, nip, 0, "\004TUCK"); HEADER(tor, tuck, 0, "\002>R"); HEADER(rfrom, tor, 0, "\002R>"); HEADER(rfetch, rfrom, 0, "\002R@"); HEADER(spfetch, rfetch, 0, "\003SP@"); HEADER(spstore, spfetch, 0, "\003SP!"); HEADER(rpfetch, spstore, 0, "\003RP@"); HEADER(rpstore, rpfetch, 0, "\003RP!"); HEADER(fetch, rpstore, 0, "\001@"); HEADER(store, fetch, 0, "\001!"); HEADER(cfetch, store, 0, "\002C@"); HEADER(cstore, cfetch, 0, "\002C!"); /* synonyms for unified code/data/header space */ HEADER(ifetch, cstore, 0, "\002I@"); HEADER(istore, ifetch, 0, "\002I!"); HEADER(icfetch, istore, 0, "\003IC@"); HEADER(icstore, icfetch, 0, "\003IC!"); HEADER(hfetch, icstore, 0, "\002H@"); HEADER(hstore, hfetch, 0, "\002H!"); HEADER(hcfetch, hstore, 0, "\003HC@"); HEADER(hcstore, hcfetch, 0, "\003HC!"); HEADER(plus, hcstore, 0, "\001+"); HEADER(plusstore, plus, 0, "\002+!"); HEADER(mplus, plusstore, 0, "\002M+"); HEADER(minus, mplus, 0, "\001-"); HEADER(mult, minus, 0, "\001*"); HEADER(div, mult, 0, "\001/"); HEADER(and, div, 0, "\003AND"); HEADER(or, and, 0, "\002OR"); HEADER(xor, or, 0, "\003XOR"); HEADER(invert, xor, 0, "\006INVERT"); HEADER(negate, invert, 0, "\006NEGATE"); HEADER(oneplus, negate, 0, "\0021+"); HEADER(oneminus, oneplus, 0, "\0021-"); HEADER(swapbytes, oneminus, 0, "\002><"); HEADER(twostar, swapbytes, 0, "\0022*"); HEADER(twoslash, twostar, 0, "\0022/"); HEADER(lshift, twoslash, 0, "\006LSHIFT"); HEADER(rshift, lshift, 0, "\006RSHIFT"); HEADER(zeroequal, rshift, 0, "\0020="); HEADER(zeroless, zeroequal, 0, "\0020<"); HEADER(equal, zeroless, 0, "\001="); HEADER(notequal, equal, 0, "\002<>"); HEADER(less, notequal, 0, "\001<"); HEADER(greater, less, 0, "\001>"); HEADER(uless, greater, 0, "\002U<"); HEADER(ugreater, uless, 0, "\002U>"); HEADER(branch, ugreater, 0, "\006branch"); HEADER(qbranch, branch, 0, "\007?branch"); HEADER(xplusloop, qbranch, 0, "\007(+loop)"); HEADER(xloop, xplusloop, 0, "\006(loop)"); HEADER(xdo, xloop, 0, "\004(do)"); HEADER(i, xdo, 0, "\001I"); HEADER(j, i, 0, "\001J"); HEADER(unloop, j, 0, "\006UNLOOP"); HEADER(umstar, unloop, 0, "\003UM*"); HEADER(umslashmod, umstar, 0, "\006UM/MOD"); HEADER(fill, umslashmod, 0, "\004FILL"); HEADER(cmove, fill, 0, "\005CMOVE"); HEADER(cmoveup, cmove, 0, "\006CMOVE>"); HEADER(itod, cmoveup, 0, "\004I->D"); HEADER(skip, itod, 0, "\004SKIP"); HEADER(scan, skip, 0, "\004SCAN"); HEADER(sequal, scan, 0, "\002S="); HEADER(nequal, sequal, 0, "\002N="); HEADER(key, nequal, 0, "\003KEY"); HEADER(emit, key, 0, "\004EMIT"); HEADER(keyq, emit, 0, "\004KEY?"); HEADER(bye, keyq, 0, "\003BYE"); /* high level definitions */ HEADER(u0, bye, 0, "\002U0"); HEADER(toin, u0, 0, "\003>IN"); HEADER(base, toin, 0, "\004BASE"); HEADER(state, base, 0, "\005STATE"); HEADER(dp, state, 0, "\002DP"); HEADER(ticksource, dp, 0, "\007'SOURCE"); HEADER(latest, ticksource, 0, "\006LATEST"); HEADER(hp, latest, 0, "\002HP"); HEADER(lp, hp, 0, "\002LP"); // HEADER(idp, lp, 0, "\003IDP"); HEADER(newest, lp, 0, "\006NEWEST"); HEADER(uinit, newest, 0, "\005UINIT"); HEADER(ninit, uinit, 0, "\005#INIT"); HEADER(pad, ninit, 0, "\003PAD"); HEADER(l0, pad, 0, "\002L0"); HEADER(s0, l0, 0, "\002S0"); HEADER(r0, s0, 0, "\002R0"); HEADER(tib, r0, 0, "\003TIB"); HEADER(tibsize, tib, 0, "\007TIBSIZE"); HEADER(bl, tibsize, 0, "\002BL"); HEADER(zero, bl, 0, "\0010"); HEADER(one, zero, 0, "\0011"); HEADER(two, one, 0, "\0012"); HEADER(three, two, 0, "\0013"); HEADER(minusone, three, 0, "\002-1"); HEADER(cell, minusone, 0, "\004CELL"); HEADER(chars, cell, 0, "\005CHARS"); HEADER(here, chars, 0, "\004HERE"); HEADER(allot, here, 0, "\005ALLOT"); HEADER(comma, allot, 0, "\001,"); HEADER(ccomma, comma, 0, "\002C,"); HEADER(aligned, ccomma, 0, "\007ALIGNED"); HEADER(align, aligned, 0, "\005ALIGN"); HEADER(cellplus, align, 0, "\005CELL+"); HEADER(charplus, cellplus, 0, "\005CHAR+"); HEADER(tobody, charplus, 0, "\005>BODY"); HEADER(commaxt, tobody, 0, "\010COMPILE,"); HEADER(storecf, commaxt, 0, "\003!CF"); HEADER(commacf, storecf, 0, "\003,CF"); HEADER(storecolon, commacf, 0, "\006!COLON"); HEADER(commaexit, storecolon, 0, "\005,EXIT"); HEADER(commabranch, commaexit, 0, "\007,BRANCH"); HEADER(commadest, commabranch, 0, "\005,DEST"); HEADER(storedest, commadest, 0, "\005!DEST"); HEADER(commanone, storedest, 0, "\005,NONE"); HEADER(twofetch, commanone, 0, "\0022@"); HEADER(twostore, twofetch, 0, "\0022!"); HEADER(twodrop, twostore, 0, "\0052DROP"); HEADER(twodup, twodrop, 0, "\0042DUP"); HEADER(twoswap, twodup, 0, "\0052SWAP"); HEADER(twoover, twoswap, 0, "\0052OVER"); HEADER(stod, twoover, 0, "\003S>D"); HEADER(qnegate, stod, 0, "\007?NEGATE"); HEADER(abs, qnegate, 0, "\003ABS"); HEADER(dnegate, abs, 0, "\007DNEGATE"); HEADER(qdnegate, dnegate, 0, "\010?DNEGATE"); HEADER(dabs, qdnegate, 0, "\004DABS"); HEADER(mstar, dabs, 0, "\002M*"); HEADER(smslashrem, mstar, 0, "\006SM/REM"); HEADER(fmslashmod, smslashrem, 0, "\006FM/MOD"); HEADER(star, fmslashmod, 0, "\001*"); HEADER(slashmod, star, 0, "\004/MOD"); HEADER(slash, slashmod, 0, "\001/"); HEADER(mod, slash, 0, "\003MOD"); HEADER(starslashmod, mod, 0, "\005*/MOD"); HEADER(starslash, starslashmod, 0, "\002*/"); HEADER(max, starslash, 0, "\003MAX"); HEADER(min, max, 0, "\003MIN"); HEADER(umax, min, 0, "\004UMAX"); HEADER(umin, umax, 0, "\004UMIN"); HEADER(cells, umin, 0, "\005CELLS"); HEADER(count, cells, 0, "\005COUNT"); HEADER(cr, count, 0, "\002CR"); HEADER(space, cr, 0, "\005SPACE"); HEADER(spaces, space, 0, "\006SPACES"); HEADER(accept, spaces, 0, "\006ACCEPT"); HEADER(type, accept, 0, "\004TYPE"); HEADER(udslashmod, type, 0, "\006UD/MOD"); HEADER(udstar, udslashmod, 0, "\003UD*"); HEADER(hold, udstar, 0, "\004HOLD"); HEADER(lessnum, hold, 0, "\002<#"); HEADER(todigit, lessnum, 0, "\006>DIGIT"); HEADER(num, todigit, 0, "\001#"); HEADER(nums, num, 0, "\002#S"); HEADER(numgreater, nums, 0, "\002#>"); HEADER(sign, numgreater, 0, "\004SIGN"); HEADER(udot, sign, 0, "\002U."); HEADER(dot, udot, 0, "\001."); HEADER(decimal, dot, 0, "\007DECIMAL"); HEADER(hex, decimal, 0, "\003HEX"); HEADER(source, hex, 0, "\006SOURCE"); HEADER(slashstring, source, 0, "\007/STRING"); HEADER(tocounted, slashstring, 0, "\010>COUNTED"); HEADER(adrtoin, tocounted, 0, "\006ADR>IN"); HEADER(parse, adrtoin, 0, "\005PARSE"); HEADER(word, parse, 0, "\004WORD"); HEADER(xsquote, word, 0, "\004(S\")"); HEADER(squote, xsquote, IMMEDIATE, "\002S\""); HEADER(dotquote, squote, IMMEDIATE, "\002.\""); HEADER(nfatolfa, dotquote, 0, "\007NFA>LFA"); HEADER(nfatocfa, nfatolfa, 0, "\007NFA>CFA"); HEADER(immedq, nfatocfa, 0, "\006IMMED?"); HEADER(find, immedq, 0, "\004FIND"); HEADER(literal, find, IMMEDIATE, "\007LITERAL"); HEADER(digitq, literal, 0, "\006DIGIT?"); HEADER(qsign, digitq, 0, "\005?SIGN"); HEADER(tonumber, qsign, 0, "\007>NUMBER"); HEADER(qnumber, tonumber, 0, "\007?NUMBER"); HEADER(interpret, qnumber, 0, "\011INTERPRET"); HEADER(evaluate, interpret, 0, "\010EVALUATE"); HEADER(quit, evaluate, 0, "\004QUIT"); HEADER(abort, quit, 0, "\005ABORT"); HEADER(qabort, abort, 0, "\006?ABORT"); HEADER(abortquote, qabort, IMMEDIATE, "\006ABORT\""); HEADER(tick, abortquote, 0, "\001'"); HEADER(char, tick, 0, "\004CHAR"); HEADER(bracchar, char, IMMEDIATE, "\006[CHAR]"); HEADER(paren, bracchar, IMMEDIATE, "\001("); HEADER(header, paren, 0, "\006HEADER"); HEADER(builds, header, 0, "\007)"); HEADER(does, xdoes, IMMEDIATE, "\005DOES>"); HEADER(recurse, does, IMMEDIATE, "\007RECURSE"); HEADER(leftbracket, recurse, IMMEDIATE, "\001["); HEADER(rightbracket, leftbracket, 0, "\001]"); HEADER(hide, rightbracket, 0, "\004HIDE"); HEADER(reveal, hide, 0, "\006REVEAL"); HEADER(immediate, reveal, 0, "\011IMMEDIATE"); HEADER(colon, immediate, 0, "\001:"); HEADER(semicolon, colon, IMMEDIATE, "\001;"); HEADER(brackettick, semicolon, IMMEDIATE, "\003[']"); HEADER(postpone, brackettick, IMMEDIATE, "\010POSTPONE"); HEADER(compile, postpone, 0, "\007COMPILE"); HEADER(if, compile, IMMEDIATE, "\002IF"); HEADER(then, if, IMMEDIATE, "\004THEN"); HEADER(else, then, IMMEDIATE, "\004ELSE"); HEADER(begin, else, IMMEDIATE, "\005BEGIN"); HEADER(until, begin, IMMEDIATE, "\005UNTIL"); HEADER(again, until, IMMEDIATE, "\005AGAIN"); HEADER(while, again, IMMEDIATE, "\005WHILE"); HEADER(repeat, while, IMMEDIATE, "\006REPEAT"); HEADER(tol, repeat, 0, "\002>L"); HEADER(lfrom, tol, 0, "\002L>"); HEADER(do, lfrom, IMMEDIATE, "\002DO"); HEADER(endloop, do, 0, "\007ENDLOOP"); HEADER(loop, endloop, IMMEDIATE, "\004LOOP"); HEADER(plusloop, loop, IMMEDIATE, "\005+LOOP"); HEADER(leave, plusloop, IMMEDIATE, "\005LEAVE"); HEADER(within, leave, 0, "\006WITHIN"); HEADER(move, within, 0, "\004MOVE"); HEADER(depth, move, 0, "\005DEPTH"); HEADER(environmentq, depth, 0, "\014ENVIRONMENT?"); HEADER(marker, environmentq, 0, "\006MARKER"); /* for testing */ HEADER(dothh, marker, 0, "\003.HH"); HEADER(dothhhh, dothh, 0, "\005.HHHH"); HEADER(dots, dothhhh, 0, "\002.S"); HEADER(dump, dots, 0, "\004DUMP"); HEADER(words, dump, 0, "\005WORDS"); HEADER(cold, words, 0, "\004COLD");