Annotation of gforth/prim, revision 1.47

1.1       anton       1: \ Gforth primitives
                      2: 
1.16      anton       3: \ Copyright (C) 1995,1996,1997,1998 Free Software Foundation, Inc.
1.1       anton       4: 
                      5: \ This file is part of Gforth.
                      6: 
                      7: \ Gforth is free software; you can redistribute it and/or
                      8: \ modify it under the terms of the GNU General Public License
                      9: \ as published by the Free Software Foundation; either version 2
                     10: \ of the License, or (at your option) any later version.
                     11: 
                     12: \ This program is distributed in the hope that it will be useful,
                     13: \ but WITHOUT ANY WARRANTY; without even the implied warranty of
                     14: \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
                     15: \ GNU General Public License for more details.
                     16: 
                     17: \ You should have received a copy of the GNU General Public License
                     18: \ along with this program; if not, write to the Free Software
                     19: \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
                     20: 
                     21: 
                     22: \ WARNING: This file is processed by m4. Make sure your identifiers
                     23: \ don't collide with m4's (e.g. by undefining them).
                     24: \ 
                     25: \ 
                     26: \ 
                     27: \ This file contains primitive specifications in the following format:
                     28: \ 
1.47    ! anton      29: \ forth name   ( stack effect )        category        [pronunciation]
1.1       anton      30: \ [""glossary entry""]
                     31: \ C code
                     32: \ [:
                     33: \ Forth code]
                     34: \ 
1.47    ! anton      35: \ Note: Fields in brackets are optional.  Word specifications have to
        !            36: \ be separated by at least one empty line
1.1       anton      37: \
                     38: \ Both pronounciation and stack items (in the stack effect) must
                     39: \ conform to the C name syntax or the C compiler will complain.
                     40: \ 
                     41: \ 
                     42: \ These specifications are automatically translated into C-code for the
                     43: \ interpreter and into some other files. I hope that your C compiler has
                     44: \ decent optimization, otherwise the automatically generated code will
                     45: \ be somewhat slow. The Forth version of the code is included for manual
                     46: \ compilers, so they will need to compile only the important words.
                     47: \ 
                     48: \ Note that stack pointer adjustment is performed according to stack
                     49: \ effect by automatically generated code and NEXT is automatically
                     50: \ appended to the C code. Also, you can use the names in the stack
                     51: \ effect in the C code. Stack access is automatic. One exception: if
                     52: \ your code does not fall through, the results are not stored into the
                     53: \ stack. Use different names on both sides of the '--', if you change a
                     54: \ value (some stores to the stack are optimized away).
                     55: \ 
                     56: \ 
                     57: \ 
                     58: \ The stack variables have the following types:
                     59: \ 
                     60: \ name matches type
                     61: \ f.*          Bool
                     62: \ c.*          Char
                     63: \ [nw].*               Cell
                     64: \ u.*          UCell
                     65: \ d.*          DCell
                     66: \ ud.*         UDCell
                     67: \ r.*          Float
                     68: \ a_.*         Cell *
                     69: \ c_.*         Char *
                     70: \ f_.*         Float *
                     71: \ df_.*                DFloat *
                     72: \ sf_.*                SFloat *
                     73: \ xt.*         XT
                     74: \ wid.*                WID
                     75: \ f83name.*    F83Name *
                     76: \ 
                     77: \ 
                     78: \ 
                     79: \ In addition the following names can be used:
                     80: \ ip   the instruction pointer
                     81: \ sp   the data stack pointer
                     82: \ rp   the parameter stack pointer
                     83: \ lp   the locals stack pointer
                     84: \ NEXT executes NEXT
                     85: \ cfa  
                     86: \ NEXT1        executes NEXT1
                     87: \ FLAG(x)      makes a Forth flag from a C flag
                     88: \ 
                     89: \ 
                     90: \ 
                     91: \ Percentages in comments are from Koopmans book: average/maximum use
                     92: \ (taken from four, not very representative benchmarks)
                     93: \ 
                     94: \ 
                     95: \ 
                     96: \ To do:
                     97: \ 
                     98: \ throw execute, cfa and NEXT1 out?
                     99: \ macroize *ip, ip++, *ip++ (pipelining)?
                    100: 
                    101: \ these m4 macros would collide with identifiers
                    102: undefine(`index')
                    103: undefine(`shift')
                    104: 
1.47    ! anton     105: noop   ( -- )          gforth
1.1       anton     106: ;
                    107: :
                    108:  ;
                    109: 
1.47    ! anton     110: lit    ( -- w )                gforth
1.1       anton     111: w = (Cell)NEXT_INST;
                    112: INC_IP(1);
                    113: :
                    114:  r> dup @ swap cell+ >r ;
                    115: 
1.47    ! anton     116: execute        ( xt -- )               core
1.29      crook     117: ""Perform the semantics represented by the execution token, @i{xt}.""
1.1       anton     118: ip=IP;
                    119: IF_TOS(TOS = sp[0]);
                    120: EXEC(xt);
                    121: 
1.47    ! anton     122: perform        ( a_addr -- )   gforth
1.22      crook     123: ""Equivalent to @code{@ execute}.""
1.1       anton     124: /* and pfe */
                    125: ip=IP;
                    126: IF_TOS(TOS = sp[0]);
                    127: EXEC(*(Xt *)a_addr);
                    128: :
                    129:  @ execute ;
                    130: 
1.31      jwilke    131: \fhas? skipbranchprims 0= [IF]
1.15      pazsan    132: \+glocals
1.1       anton     133: 
1.47    ! anton     134: branch-lp+!#   ( -- )  gforth  branch_lp_plus_store_number
1.1       anton     135: /* this will probably not be used */
                    136: branch_adjust_lp:
                    137: lp += (Cell)(IP[1]);
                    138: goto branch;
                    139: 
1.15      pazsan    140: \+
1.1       anton     141: 
1.47    ! anton     142: branch ( -- )          gforth
1.1       anton     143: branch:
1.23      anton     144: SET_IP((Xt *)(((Cell)IP)+(Cell)NEXT_INST));
1.1       anton     145: :
                    146:  r> dup @ + >r ;
                    147: 
                    148: \ condbranch(forthname,restline,code,forthcode)
                    149: \ this is non-syntactical: code must open a brace that is closed by the macro
                    150: define(condbranch,
                    151: $1     $2
1.23      anton     152: $3     SET_IP((Xt *)(((Cell)IP)+(Cell)NEXT_INST));
1.1       anton     153:        NEXT;
                    154: }
                    155: else
                    156:     INC_IP(1);
                    157: $4
                    158: 
1.15      pazsan    159: \+glocals
1.1       anton     160: 
                    161: $1-lp+!#       $2_lp_plus_store_number
                    162: $3    goto branch_adjust_lp;
                    163: }
                    164: else
                    165:     INC_IP(2);
                    166: 
1.15      pazsan    167: \+
1.1       anton     168: )
                    169: 
1.47    ! anton     170: condbranch(?branch,( f -- )            f83     question_branch,
1.1       anton     171: if (f==0) {
                    172:     IF_TOS(TOS = sp[0]);
1.5       jwilke    173: ,:
                    174:  0= dup     \ !f !f
                    175:  r> dup @   \ !f !f IP branchoffset
                    176:  rot and +  \ !f IP|IP+branchoffset
                    177:  swap 0= cell and + \ IP''
                    178:  >r ;)
1.1       anton     179: 
                    180: \ we don't need an lp_plus_store version of the ?dup-stuff, because it
                    181: \ is only used in if's (yet)
                    182: 
1.15      pazsan    183: \+xconds
1.1       anton     184: 
1.47    ! anton     185: ?dup-?branch   ( f -- f )      new     question_dupe_question_branch
1.1       anton     186: ""The run-time procedure compiled by @code{?DUP-IF}.""
                    187: if (f==0) {
                    188:   sp++;
                    189:   IF_TOS(TOS = sp[0]);
1.23      anton     190:   SET_IP((Xt *)(((Cell)IP)+(Cell)NEXT_INST));
1.1       anton     191:   NEXT;
                    192: }
                    193: else
                    194:   INC_IP(1);
                    195: 
1.47    ! anton     196: ?dup-0=-?branch        ( f -- )        new     question_dupe_zero_equals_question_branch
1.1       anton     197: ""The run-time procedure compiled by @code{?DUP-0=-IF}.""
                    198: /* the approach taken here of declaring the word as having the stack
                    199: effect ( f -- ) and correcting for it in the branch-taken case costs a
                    200: few cycles in that case, but is easy to convert to a CONDBRANCH
                    201: invocation */
                    202: if (f!=0) {
                    203:   sp--;
1.23      anton     204:   SET_IP((Xt *)(((Cell)IP)+(Cell)NEXT_INST));
1.1       anton     205:   NEXT;
                    206: }
                    207: else
                    208:   INC_IP(1);
                    209: 
1.15      pazsan    210: \+
1.31      jwilke    211: \f[THEN]
                    212: \fhas? skiploopprims 0= [IF]
1.1       anton     213: 
1.47    ! anton     214: condbranch((next),( -- )               cmFORTH paren_next,
1.1       anton     215: if ((*rp)--) {
                    216: ,:
                    217:  r> r> dup 1- >r
                    218:  IF dup @ + >r ELSE cell+ >r THEN ;)
                    219: 
1.47    ! anton     220: condbranch((loop),( -- )               gforth  paren_loop,
1.1       anton     221: Cell index = *rp+1;
                    222: Cell limit = rp[1];
                    223: if (index != limit) {
                    224:     *rp = index;
                    225: ,:
                    226:  r> r> 1+ r> 2dup =
                    227:  IF >r 1- >r cell+ >r
                    228:  ELSE >r >r dup @ + >r THEN ;)
                    229: 
1.47    ! anton     230: condbranch((+loop),( n -- )            gforth  paren_plus_loop,
1.1       anton     231: /* !! check this thoroughly */
                    232: Cell index = *rp;
                    233: /* sign bit manipulation and test: (x^y)<0 is equivalent to (x<0) != (y<0) */
                    234: /* dependent upon two's complement arithmetic */
                    235: Cell olddiff = index-rp[1];
                    236: if ((olddiff^(olddiff+n))>=0   /* the limit is not crossed */
                    237:     || (olddiff^n)>=0          /* it is a wrap-around effect */) {
                    238: #ifdef i386
                    239:     *rp += n;
                    240: #else
                    241:     *rp = index + n;
                    242: #endif
                    243:     IF_TOS(TOS = sp[0]);
                    244: ,:
                    245:  r> swap
                    246:  r> r> 2dup - >r
                    247:  2 pick r@ + r@ xor 0< 0=
                    248:  3 pick r> xor 0< 0= or
                    249:  IF    >r + >r dup @ + >r
                    250:  ELSE  >r >r drop cell+ >r THEN ;)
                    251: 
1.15      pazsan    252: \+xconds
1.1       anton     253: 
1.47    ! anton     254: condbranch((-loop),( u -- )            gforth  paren_minus_loop,
1.1       anton     255: /* !! check this thoroughly */
                    256: Cell index = *rp;
                    257: UCell olddiff = index-rp[1];
                    258: if (olddiff>u) {
                    259: #ifdef i386
                    260:     *rp -= u;
                    261: #else
                    262:     *rp = index - u;
                    263: #endif
                    264:     IF_TOS(TOS = sp[0]);
                    265: ,)
                    266: 
1.47    ! anton     267: condbranch((s+loop),( n -- )           gforth  paren_symmetric_plus_loop,
1.1       anton     268: ""The run-time procedure compiled by S+LOOP. It loops until the index
                    269: crosses the boundary between limit and limit-sign(n). I.e. a symmetric
                    270: version of (+LOOP).""
                    271: /* !! check this thoroughly */
                    272: Cell index = *rp;
                    273: Cell diff = index-rp[1];
                    274: Cell newdiff = diff+n;
                    275: if (n<0) {
                    276:     diff = -diff;
                    277:     newdiff = -newdiff;
                    278: }
                    279: if (diff>=0 || newdiff<0) {
                    280: #ifdef i386
                    281:     *rp += n;
                    282: #else
                    283:     *rp = index + n;
                    284: #endif
                    285:     IF_TOS(TOS = sp[0]);
                    286: ,)
                    287: 
1.15      pazsan    288: \+
1.1       anton     289: 
1.47    ! anton     290: unloop ( -- )  core
1.1       anton     291: rp += 2;
                    292: :
                    293:  r> rdrop rdrop >r ;
                    294: 
1.47    ! anton     295: (for)  ( ncount -- )           cmFORTH         paren_for
1.1       anton     296: /* or (for) = >r -- collides with unloop! */
                    297: *--rp = 0;
                    298: *--rp = ncount;
                    299: :
                    300:  r> swap 0 >r >r >r ;
                    301: 
1.47    ! anton     302: (do)   ( nlimit nstart -- )            gforth          paren_do
1.1       anton     303: /* or do it in high-level? 0.09/0.23% */
                    304: *--rp = nlimit;
                    305: *--rp = nstart;
                    306: :
                    307:  r> swap rot >r >r >r ;
                    308: 
1.47    ! anton     309: (?do)  ( nlimit nstart -- )    gforth  paren_question_do
1.1       anton     310: *--rp = nlimit;
                    311: *--rp = nstart;
                    312: if (nstart == nlimit) {
                    313:     IF_TOS(TOS = sp[0]);
                    314:     goto branch;
                    315:     }
                    316: else {
                    317:     INC_IP(1);
                    318: }
                    319: :
                    320:   2dup =
                    321:   IF   r> swap rot >r >r
                    322:        dup @ + >r
                    323:   ELSE r> swap rot >r >r
                    324:        cell+ >r
                    325:   THEN ;                               \ --> CORE-EXT
                    326: 
1.15      pazsan    327: \+xconds
1.1       anton     328: 
1.47    ! anton     329: (+do)  ( nlimit nstart -- )    gforth  paren_plus_do
1.1       anton     330: *--rp = nlimit;
                    331: *--rp = nstart;
                    332: if (nstart >= nlimit) {
                    333:     IF_TOS(TOS = sp[0]);
                    334:     goto branch;
                    335:     }
                    336: else {
                    337:     INC_IP(1);
                    338: }
                    339: :
                    340:  swap 2dup
                    341:  r> swap >r swap >r
                    342:  >=
                    343:  IF
                    344:      dup @ +
                    345:  ELSE
                    346:      cell+
                    347:  THEN  >r ;
                    348: 
1.47    ! anton     349: (u+do) ( ulimit ustart -- )    gforth  paren_u_plus_do
1.1       anton     350: *--rp = ulimit;
                    351: *--rp = ustart;
                    352: if (ustart >= ulimit) {
                    353:     IF_TOS(TOS = sp[0]);
                    354:     goto branch;
                    355:     }
                    356: else {
                    357:     INC_IP(1);
                    358: }
                    359: :
                    360:  swap 2dup
                    361:  r> swap >r swap >r
                    362:  u>=
                    363:  IF
                    364:      dup @ +
                    365:  ELSE
                    366:      cell+
                    367:  THEN  >r ;
                    368: 
1.47    ! anton     369: (-do)  ( nlimit nstart -- )    gforth  paren_minus_do
1.1       anton     370: *--rp = nlimit;
                    371: *--rp = nstart;
                    372: if (nstart <= nlimit) {
                    373:     IF_TOS(TOS = sp[0]);
                    374:     goto branch;
                    375:     }
                    376: else {
                    377:     INC_IP(1);
                    378: }
                    379: :
                    380:  swap 2dup
                    381:  r> swap >r swap >r
                    382:  <=
                    383:  IF
                    384:      dup @ +
                    385:  ELSE
                    386:      cell+
                    387:  THEN  >r ;
                    388: 
1.47    ! anton     389: (u-do) ( ulimit ustart -- )    gforth  paren_u_minus_do
1.1       anton     390: *--rp = ulimit;
                    391: *--rp = ustart;
                    392: if (ustart <= ulimit) {
                    393:     IF_TOS(TOS = sp[0]);
                    394:     goto branch;
                    395:     }
                    396: else {
                    397:     INC_IP(1);
                    398: }
                    399: :
                    400:  swap 2dup
                    401:  r> swap >r swap >r
                    402:  u<=
                    403:  IF
                    404:      dup @ +
                    405:  ELSE
                    406:      cell+
                    407:  THEN  >r ;
                    408: 
1.15      pazsan    409: \+
1.1       anton     410: 
1.5       jwilke    411: \ don't make any assumptions where the return stack is!!
                    412: \ implement this in machine code if it should run quickly!
                    413: 
1.47    ! anton     414: i      ( -- n )                core
1.1       anton     415: n = *rp;
                    416: :
1.5       jwilke    417: \ rp@ cell+ @ ;
                    418:   r> r> tuck >r >r ;
1.1       anton     419: 
1.47    ! anton     420: i'     ( -- w )                gforth          i_tick
1.1       anton     421: ""loop end value""
                    422: w = rp[1];
                    423: :
1.5       jwilke    424: \ rp@ cell+ cell+ @ ;
                    425:   r> r> r> dup itmp ! >r >r >r itmp @ ;
                    426: variable itmp
1.1       anton     427: 
1.47    ! anton     428: j      ( -- n )                core
1.1       anton     429: n = rp[2];
                    430: :
1.5       jwilke    431: \ rp@ cell+ cell+ cell+ @ ;
                    432:   r> r> r> r> dup itmp ! >r >r >r >r itmp @ ;
                    433: [IFUNDEF] itmp variable itmp [THEN]
1.1       anton     434: 
1.47    ! anton     435: k      ( -- n )                gforth
1.1       anton     436: n = rp[4];
                    437: :
1.5       jwilke    438: \ rp@ [ 5 cells ] Literal + @ ;
                    439:   r> r> r> r> r> r> dup itmp ! >r >r >r >r >r >r itmp @ ;
                    440: [IFUNDEF] itmp variable itmp [THEN]
1.31      jwilke    441: 
                    442: \f[THEN]
1.1       anton     443: 
                    444: \ digit is high-level: 0/0%
                    445: 
1.47    ! anton     446: move   ( c_from c_to ucount -- )               core
1.33      anton     447: ""Copy the contents of @i{ucount} address units at @i{c-from} to
                    448: @i{c-to}. @code{move} works correctly even if the two areas overlap.""
1.1       anton     449: memmove(c_to,c_from,ucount);
                    450: /* make an Ifdef for bsd and others? */
                    451: :
                    452:  >r 2dup u< IF r> cmove> ELSE r> cmove THEN ;
                    453: 
1.47    ! anton     454: cmove  ( c_from c_to u -- )    string  c_move
1.33      anton     455: ""Copy the contents of @i{ucount} characters from data space at
                    456: @i{c-from} to @i{c-to}. The copy proceeds @code{char}-by-@code{char}
                    457: from low address to high address; i.e., for overlapping areas it is
                    458: safe if @i{c-to}=<@i{c-from}.""
1.1       anton     459: while (u-- > 0)
                    460:   *c_to++ = *c_from++;
                    461: :
                    462:  bounds ?DO  dup c@ I c! 1+  LOOP  drop ;
                    463: 
1.47    ! anton     464: cmove> ( c_from c_to u -- )    string  c_move_up
1.33      anton     465: ""Copy the contents of @i{ucount} characters from data space at
                    466: @i{c-from} to @i{c-to}. The copy proceeds @code{char}-by-@code{char}
                    467: from high address to low address; i.e., for overlapping areas it is
                    468: safe if @i{c-to}>=@i{c-from}.""
1.1       anton     469: while (u-- > 0)
                    470:   c_to[u] = c_from[u];
                    471: :
                    472:  dup 0= IF  drop 2drop exit  THEN
                    473:  rot over + -rot bounds swap 1-
                    474:  DO  1- dup c@ I c!  -1 +LOOP  drop ;
                    475: 
1.47    ! anton     476: fill   ( c_addr u c -- )       core
1.29      crook     477: "" If @i{u}>0, store character @i{c} in each of @i{u} consecutive
                    478: @code{char} addresses in memory, starting at address @i{c-addr}.""
1.1       anton     479: memset(c_addr,c,u);
                    480: :
                    481:  -rot bounds
                    482:  ?DO  dup I c!  LOOP  drop ;
                    483: 
1.47    ! anton     484: compare        ( c_addr1 u1 c_addr2 u2 -- n )  string
1.29      crook     485: ""Compare two strings lexicographically. If they are equal, @i{n} is 0; if
                    486: the first string is smaller, @i{n} is -1; if the first string is larger, @i{n}
1.1       anton     487: is 1. Currently this is based on the machine's character
1.26      crook     488: comparison. In the future, this may change to consider the current
1.1       anton     489: locale and its collation order.""
1.46      pazsan    490: /* close ' to keep fontify happy */ 
1.1       anton     491: n = memcmp(c_addr1, c_addr2, u1<u2 ? u1 : u2);
                    492: if (n==0)
                    493:   n = u1-u2;
                    494: if (n<0)
                    495:   n = -1;
                    496: else if (n>0)
                    497:   n = 1;
                    498: :
1.43      pazsan    499:  rot 2dup swap - >r min swap -text dup
                    500:  IF  rdrop  ELSE  drop r> sgn  THEN ;
                    501: : sgn ( n -- -1/0/1 )
                    502:  dup 0= IF EXIT THEN  0< 2* 1+ ;
1.1       anton     503: 
1.47    ! anton     504: -text  ( c_addr1 u c_addr2 -- n )      new     dash_text
1.1       anton     505: n = memcmp(c_addr1, c_addr2, u);
                    506: if (n<0)
                    507:   n = -1;
                    508: else if (n>0)
                    509:   n = 1;
                    510: :
                    511:  swap bounds
                    512:  ?DO  dup c@ I c@ = WHILE  1+  LOOP  drop 0
                    513:  ELSE  c@ I c@ - unloop  THEN  -text-flag ;
1.43      pazsan    514: : sgn ( n -- -1/0/1 )
                    515:  dup 0= IF EXIT THEN  0< 2* 1+ ;
1.1       anton     516: 
1.47    ! anton     517: toupper        ( c1 -- c2 )    gforth
1.29      crook     518: ""If @i{c1} is a lower-case character (in the current locale), @i{c2}
1.25      anton     519: is the equivalent upper-case character. All other characters are unchanged.""
1.1       anton     520: c2 = toupper(c1);
                    521: :
                    522:  dup [char] a - [ char z char a - 1 + ] Literal u<  bl and - ;
                    523: 
1.47    ! anton     524: capscomp       ( c_addr1 u c_addr2 -- n )      new
1.1       anton     525: n = memcasecmp(c_addr1, c_addr2, u); /* !! use something that works in all locales */
                    526: if (n<0)
                    527:   n = -1;
                    528: else if (n>0)
                    529:   n = 1;
                    530: :
                    531:  swap bounds
                    532:  ?DO  dup c@ I c@ <>
                    533:      IF  dup c@ toupper I c@ toupper =
                    534:      ELSE  true  THEN  WHILE  1+  LOOP  drop 0
                    535:  ELSE  c@ toupper I c@ toupper - unloop  THEN  -text-flag ;
                    536: 
1.47    ! anton     537: -trailing      ( c_addr u1 -- c_addr u2 )              string  dash_trailing
1.29      crook     538: ""Adjust the string specified by @i{c-addr, u1} to remove all trailing
                    539: spaces. @i{u2} is the length of the modified string.""
1.1       anton     540: u2 = u1;
1.4       anton     541: while (u2>0 && c_addr[u2-1] == ' ')
1.1       anton     542:   u2--;
                    543: :
                    544:  BEGIN  1- 2dup + c@ bl =  WHILE
                    545:         dup  0= UNTIL  ELSE  1+  THEN ;
                    546: 
1.47    ! anton     547: /string        ( c_addr1 u1 n -- c_addr2 u2 )  string  slash_string
1.29      crook     548: ""Adjust the string specified by @i{c-addr1, u1} to remove @i{n}
1.27      crook     549: characters from the start of the string.""
1.1       anton     550: c_addr2 = c_addr1+n;
                    551: u2 = u1-n;
                    552: :
                    553:  tuck - >r + r> dup 0< IF  - 0  THEN ;
                    554: 
1.47    ! anton     555: +      ( n1 n2 -- n )          core    plus
1.1       anton     556: n = n1+n2;
                    557: 
                    558: \ PFE-0.9.14 has it differently, but the next release will have it as follows
1.47    ! anton     559: under+ ( n1 n2 n3 -- n n2 )    gforth  under_plus
1.29      crook     560: ""add @i{n3} to @i{n1} (giving @i{n})""
1.1       anton     561: n = n1+n3;
                    562: :
                    563:  rot + swap ;
                    564: 
1.47    ! anton     565: -      ( n1 n2 -- n )          core    minus
1.1       anton     566: n = n1-n2;
                    567: :
                    568:  negate + ;
                    569: 
1.47    ! anton     570: negate ( n1 -- n2 )            core
1.1       anton     571: /* use minus as alias */
                    572: n2 = -n1;
                    573: :
                    574:  invert 1+ ;
                    575: 
1.47    ! anton     576: 1+     ( n1 -- n2 )            core            one_plus
1.1       anton     577: n2 = n1+1;
                    578: :
                    579:  1 + ;
                    580: 
1.47    ! anton     581: 1-     ( n1 -- n2 )            core            one_minus
1.1       anton     582: n2 = n1-1;
                    583: :
                    584:  1 - ;
                    585: 
1.47    ! anton     586: max    ( n1 n2 -- n )  core
1.1       anton     587: if (n1<n2)
                    588:   n = n2;
                    589: else
                    590:   n = n1;
                    591: :
                    592:  2dup < IF swap THEN drop ;
                    593: 
1.47    ! anton     594: min    ( n1 n2 -- n )  core
1.1       anton     595: if (n1<n2)
                    596:   n = n1;
                    597: else
                    598:   n = n2;
                    599: :
                    600:  2dup > IF swap THEN drop ;
                    601: 
1.47    ! anton     602: abs    ( n1 -- n2 )    core
1.1       anton     603: if (n1<0)
                    604:   n2 = -n1;
                    605: else
                    606:   n2 = n1;
                    607: :
                    608:  dup 0< IF negate THEN ;
                    609: 
1.47    ! anton     610: *      ( n1 n2 -- n )          core    star
1.1       anton     611: n = n1*n2;
                    612: :
                    613:  um* drop ;
                    614: 
1.47    ! anton     615: /      ( n1 n2 -- n )          core    slash
1.1       anton     616: n = n1/n2;
                    617: :
                    618:  /mod nip ;
                    619: 
1.47    ! anton     620: mod    ( n1 n2 -- n )          core
1.1       anton     621: n = n1%n2;
                    622: :
                    623:  /mod drop ;
                    624: 
1.47    ! anton     625: /mod   ( n1 n2 -- n3 n4 )              core            slash_mod
1.1       anton     626: n4 = n1/n2;
                    627: n3 = n1%n2; /* !! is this correct? look into C standard! */
                    628: :
                    629:  >r s>d r> fm/mod ;
                    630: 
1.47    ! anton     631: 2*     ( n1 -- n2 )            core            two_star
1.1       anton     632: n2 = 2*n1;
                    633: :
                    634:  dup + ;
                    635: 
1.47    ! anton     636: 2/     ( n1 -- n2 )            core            two_slash
1.1       anton     637: /* !! is this still correct? */
                    638: n2 = n1>>1;
                    639: :
                    640:  dup MINI and IF 1 ELSE 0 THEN
                    641:  [ bits/byte cell * 1- ] literal 
1.5       jwilke    642:  0 DO 2* swap dup 2* >r MINI and 
1.1       anton     643:      IF 1 ELSE 0 THEN or r> swap
                    644:  LOOP nip ;
                    645: 
1.47    ! anton     646: fm/mod ( d1 n1 -- n2 n3 )              core            f_m_slash_mod
1.29      crook     647: ""Floored division: @i{d1} = @i{n3}*@i{n1}+@i{n2}, @i{n1}>@i{n2}>=0 or 0>=@i{n2}>@i{n1}.""
1.1       anton     648: #ifdef BUGGY_LONG_LONG
                    649: DCell r = fmdiv(d1,n1);
                    650: n2=r.hi;
                    651: n3=r.lo;
                    652: #else
                    653: /* assumes that the processor uses either floored or symmetric division */
                    654: n3 = d1/n1;
                    655: n2 = d1%n1;
                    656: /* note that this 1%-3>0 is optimized by the compiler */
                    657: if (1%-3>0 && (d1<0) != (n1<0) && n2!=0) {
                    658:   n3--;
                    659:   n2+=n1;
                    660: }
                    661: #endif
                    662: :
                    663:  dup >r dup 0< IF  negate >r dnegate r>  THEN
                    664:  over       0< IF  tuck + swap  THEN
                    665:  um/mod
                    666:  r> 0< IF  swap negate swap  THEN ;
                    667: 
1.47    ! anton     668: sm/rem ( d1 n1 -- n2 n3 )              core            s_m_slash_rem
1.29      crook     669: ""Symmetric division: @i{d1} = @i{n3}*@i{n1}+@i{n2}, sign(@i{n2})=sign(@i{d1}) or 0.""
1.1       anton     670: #ifdef BUGGY_LONG_LONG
                    671: DCell r = smdiv(d1,n1);
                    672: n2=r.hi;
                    673: n3=r.lo;
                    674: #else
                    675: /* assumes that the processor uses either floored or symmetric division */
                    676: n3 = d1/n1;
                    677: n2 = d1%n1;
                    678: /* note that this 1%-3<0 is optimized by the compiler */
                    679: if (1%-3<0 && (d1<0) != (n1<0) && n2!=0) {
                    680:   n3++;
                    681:   n2-=n1;
                    682: }
                    683: #endif
                    684: :
                    685:  over >r dup >r abs -rot
                    686:  dabs rot um/mod
                    687:  r> r@ xor 0< IF       negate       THEN
                    688:  r>        0< IF  swap negate swap  THEN ;
                    689: 
1.47    ! anton     690: m*     ( n1 n2 -- d )          core    m_star
1.1       anton     691: #ifdef BUGGY_LONG_LONG
                    692: d = mmul(n1,n2);
                    693: #else
                    694: d = (DCell)n1 * (DCell)n2;
                    695: #endif
                    696: :
                    697:  2dup      0< and >r
                    698:  2dup swap 0< and >r
                    699:  um* r> - r> - ;
                    700: 
1.47    ! anton     701: um*    ( u1 u2 -- ud )         core    u_m_star
1.1       anton     702: /* use u* as alias */
                    703: #ifdef BUGGY_LONG_LONG
                    704: ud = ummul(u1,u2);
                    705: #else
                    706: ud = (UDCell)u1 * (UDCell)u2;
                    707: #endif
                    708: :
                    709:    >r >r 0 0 r> r> [ 8 cells ] literal 0
                    710:    DO
                    711:        over >r dup >r 0< and d2*+ drop
                    712:        r> 2* r> swap
                    713:    LOOP 2drop ;
                    714: : d2*+ ( ud n -- ud+n c )
                    715:    over MINI
                    716:    and >r >r 2dup d+ swap r> + swap r> ;
                    717: 
1.47    ! anton     718: um/mod ( ud u1 -- u2 u3 )              core    u_m_slash_mod
1.32      anton     719: ""ud=u3*u1+u2, u1>u2>=0""
1.1       anton     720: #ifdef BUGGY_LONG_LONG
                    721: UDCell r = umdiv(ud,u1);
                    722: u2=r.hi;
                    723: u3=r.lo;
                    724: #else
                    725: u3 = ud/u1;
                    726: u2 = ud%u1;
                    727: #endif
                    728: :
                    729:    0 swap [ 8 cells 1 + ] literal 0
1.5       jwilke    730:    ?DO /modstep
1.1       anton     731:    LOOP drop swap 1 rshift or swap ;
                    732: : /modstep ( ud c R: u -- ud-?u c R: u )
1.5       jwilke    733:    >r over r@ u< 0= or IF r@ - 1 ELSE 0 THEN  d2*+ r> ;
1.1       anton     734: : d2*+ ( ud n -- ud+n c )
                    735:    over MINI
                    736:    and >r >r 2dup d+ swap r> + swap r> ;
                    737: 
1.47    ! anton     738: m+     ( d1 n -- d2 )          double          m_plus
1.1       anton     739: #ifdef BUGGY_LONG_LONG
                    740: d2.lo = d1.lo+n;
                    741: d2.hi = d1.hi - (n<0) + (d2.lo<d1.lo);
                    742: #else
                    743: d2 = d1+n;
                    744: #endif
                    745: :
                    746:  s>d d+ ;
                    747: 
1.47    ! anton     748: d+     ( d1 d2 -- d )          double  d_plus
1.1       anton     749: #ifdef BUGGY_LONG_LONG
                    750: d.lo = d1.lo+d2.lo;
                    751: d.hi = d1.hi + d2.hi + (d.lo<d1.lo);
                    752: #else
                    753: d = d1+d2;
                    754: #endif
                    755: :
                    756:  rot + >r tuck + swap over u> r> swap - ;
                    757: 
1.47    ! anton     758: d-     ( d1 d2 -- d )          double          d_minus
1.1       anton     759: #ifdef BUGGY_LONG_LONG
                    760: d.lo = d1.lo - d2.lo;
                    761: d.hi = d1.hi-d2.hi-(d1.lo<d2.lo);
                    762: #else
                    763: d = d1-d2;
                    764: #endif
                    765: :
                    766:  dnegate d+ ;
                    767: 
1.47    ! anton     768: dnegate        ( d1 -- d2 )            double  d_negate
1.1       anton     769: /* use dminus as alias */
                    770: #ifdef BUGGY_LONG_LONG
                    771: d2 = dnegate(d1);
                    772: #else
                    773: d2 = -d1;
                    774: #endif
                    775: :
                    776:  invert swap negate tuck 0= - ;
                    777: 
1.47    ! anton     778: d2*    ( d1 -- d2 )            double          d_two_star
1.1       anton     779: #ifdef BUGGY_LONG_LONG
                    780: d2.lo = d1.lo<<1;
                    781: d2.hi = (d1.hi<<1) | (d1.lo>>(CELL_BITS-1));
                    782: #else
                    783: d2 = 2*d1;
                    784: #endif
                    785: :
                    786:  2dup d+ ;
                    787: 
1.47    ! anton     788: d2/    ( d1 -- d2 )            double          d_two_slash
1.1       anton     789: #ifdef BUGGY_LONG_LONG
                    790: d2.hi = d1.hi>>1;
                    791: d2.lo= (d1.lo>>1) | (d1.hi<<(CELL_BITS-1));
                    792: #else
                    793: d2 = d1>>1;
                    794: #endif
                    795: :
                    796:  dup 1 and >r 2/ swap 2/ [ 1 8 cells 1- lshift 1- ] Literal and
                    797:  r> IF  [ 1 8 cells 1- lshift ] Literal + THEN  swap ;
                    798: 
1.47    ! anton     799: and    ( w1 w2 -- w )          core
1.1       anton     800: w = w1&w2;
                    801: 
1.47    ! anton     802: or     ( w1 w2 -- w )          core
1.1       anton     803: w = w1|w2;
                    804: :
                    805:  invert swap invert and invert ;
                    806: 
1.47    ! anton     807: xor    ( w1 w2 -- w )          core    x_or
1.1       anton     808: w = w1^w2;
                    809: 
1.47    ! anton     810: invert ( w1 -- w2 )            core
1.1       anton     811: w2 = ~w1;
                    812: :
                    813:  MAXU xor ;
                    814: 
1.47    ! anton     815: rshift ( u1 n -- u2 )          core    r_shift
1.1       anton     816:   u2 = u1>>n;
                    817: :
                    818:     0 ?DO 2/ MAXI and LOOP ;
                    819: 
1.47    ! anton     820: lshift ( u1 n -- u2 )          core    l_shift
1.1       anton     821:   u2 = u1<<n;
                    822: :
                    823:     0 ?DO 2* LOOP ;
                    824: 
                    825: \ comparisons(prefix, args, prefix, arg1, arg2, wordsets...)
                    826: define(comparisons,
1.47    ! anton     827: $1=    ( $2 -- f )             $6      $3equals
1.1       anton     828: f = FLAG($4==$5);
                    829: :
                    830:     [ char $1x char 0 = [IF]
                    831:        ] IF false ELSE true THEN [
                    832:     [ELSE]
                    833:        ] xor 0= [
                    834:     [THEN] ] ;
                    835: 
1.47    ! anton     836: $1<>   ( $2 -- f )             $7      $3not_equals
1.1       anton     837: f = FLAG($4!=$5);
                    838: :
                    839:     [ char $1x char 0 = [IF]
                    840:        ] IF true ELSE false THEN [
                    841:     [ELSE]
                    842:        ] xor 0<> [
                    843:     [THEN] ] ;
                    844: 
1.47    ! anton     845: $1<    ( $2 -- f )             $8      $3less_than
1.1       anton     846: f = FLAG($4<$5);
                    847: :
                    848:     [ char $1x char 0 = [IF]
                    849:        ] MINI and 0<> [
                    850:     [ELSE] char $1x char u = [IF]
                    851:        ]   2dup xor 0<  IF nip ELSE - THEN 0<  [
                    852:        [ELSE]
                    853:            ] MINI xor >r MINI xor r> u< [
                    854:        [THEN]
                    855:     [THEN] ] ;
                    856: 
1.47    ! anton     857: $1>    ( $2 -- f )             $9      $3greater_than
1.1       anton     858: f = FLAG($4>$5);
                    859: :
                    860:     [ char $1x char 0 = [IF] ] negate [ [ELSE] ] swap [ [THEN] ]
                    861:     $1< ;
                    862: 
1.47    ! anton     863: $1<=   ( $2 -- f )             gforth  $3less_or_equal
1.1       anton     864: f = FLAG($4<=$5);
                    865: :
                    866:     $1> 0= ;
                    867: 
1.47    ! anton     868: $1>=   ( $2 -- f )             gforth  $3greater_or_equal
1.1       anton     869: f = FLAG($4>=$5);
                    870: :
                    871:     [ char $1x char 0 = [IF] ] negate [ [ELSE] ] swap [ [THEN] ]
                    872:     $1<= ;
                    873: 
                    874: )
                    875: 
                    876: comparisons(0, n, zero_, n, 0, core, core-ext, core, core-ext)
                    877: comparisons(, n1 n2, , n1, n2, core, core-ext, core, core)
                    878: comparisons(u, u1 u2, u_, u1, u2, gforth, gforth, core, core-ext)
                    879: 
                    880: \ dcomparisons(prefix, args, prefix, arg1, arg2, wordsets...)
                    881: define(dcomparisons,
1.47    ! anton     882: $1=    ( $2 -- f )             $6      $3equals
1.1       anton     883: #ifdef BUGGY_LONG_LONG
                    884: f = FLAG($4.lo==$5.lo && $4.hi==$5.hi);
                    885: #else
                    886: f = FLAG($4==$5);
                    887: #endif
                    888: 
1.47    ! anton     889: $1<>   ( $2 -- f )             $7      $3not_equals
1.1       anton     890: #ifdef BUGGY_LONG_LONG
                    891: f = FLAG($4.lo!=$5.lo || $4.hi!=$5.hi);
                    892: #else
                    893: f = FLAG($4!=$5);
                    894: #endif
                    895: 
1.47    ! anton     896: $1<    ( $2 -- f )             $8      $3less_than
1.1       anton     897: #ifdef BUGGY_LONG_LONG
                    898: f = FLAG($4.hi==$5.hi ? $4.lo<$5.lo : $4.hi<$5.hi);
                    899: #else
                    900: f = FLAG($4<$5);
                    901: #endif
                    902: 
1.47    ! anton     903: $1>    ( $2 -- f )             $9      $3greater_than
1.1       anton     904: #ifdef BUGGY_LONG_LONG
                    905: f = FLAG($4.hi==$5.hi ? $4.lo>$5.lo : $4.hi>$5.hi);
                    906: #else
                    907: f = FLAG($4>$5);
                    908: #endif
                    909: 
1.47    ! anton     910: $1<=   ( $2 -- f )             gforth  $3less_or_equal
1.1       anton     911: #ifdef BUGGY_LONG_LONG
                    912: f = FLAG($4.hi==$5.hi ? $4.lo<=$5.lo : $4.hi<=$5.hi);
                    913: #else
                    914: f = FLAG($4<=$5);
                    915: #endif
                    916: 
1.47    ! anton     917: $1>=   ( $2 -- f )             gforth  $3greater_or_equal
1.1       anton     918: #ifdef BUGGY_LONG_LONG
                    919: f = FLAG($4.hi==$5.hi ? $4.lo>=$5.lo : $4.hi>=$5.hi);
                    920: #else
                    921: f = FLAG($4>=$5);
                    922: #endif
                    923: 
                    924: )
                    925: 
1.15      pazsan    926: \+dcomps
1.1       anton     927: 
                    928: dcomparisons(d, d1 d2, d_, d1, d2, double, gforth, double, gforth)
                    929: dcomparisons(d0, d, d_zero_, d, DZERO, double, gforth, double, gforth)
                    930: dcomparisons(du, ud1 ud2, d_u_, ud1, ud2, gforth, gforth, double-ext, gforth)
                    931: 
1.15      pazsan    932: \+
1.1       anton     933: 
1.47    ! anton     934: within ( u1 u2 u3 -- f )               core-ext
1.32      anton     935: ""u2=<u1<u3 or: u3=<u2 and u1 is not in [u3,u2).  This works for
                    936: unsigned and signed numbers (but not a mixture).  Another way to think
                    937: about this word is to consider the numbers as a circle (wrapping
                    938: around from @code{max-u} to 0 for unsigned, and from @code{max-n} to
                    939: min-n for signed numbers); now consider the range from u2 towards
                    940: increasing numbers up to and excluding u3 (giving an empty range if
                    941: u2=u3; if u1 is in this range, @code{within} returns true.""
1.1       anton     942: f = FLAG(u1-u2 < u3-u2);
                    943: :
                    944:  over - >r - r> u< ;
                    945: 
1.47    ! anton     946: sp@    ( -- a_addr )           gforth          sp_fetch
1.1       anton     947: a_addr = sp+1;
                    948: 
1.47    ! anton     949: sp!    ( a_addr -- )           gforth          sp_store
1.1       anton     950: sp = a_addr;
                    951: /* works with and without TOS caching */
                    952: 
1.47    ! anton     953: rp@    ( -- a_addr )           gforth          rp_fetch
1.1       anton     954: a_addr = rp;
                    955: 
1.47    ! anton     956: rp!    ( a_addr -- )           gforth          rp_store
1.1       anton     957: rp = a_addr;
                    958: 
1.15      pazsan    959: \+floating
1.1       anton     960: 
1.47    ! anton     961: fp@    ( -- f_addr )   gforth  fp_fetch
1.1       anton     962: f_addr = fp;
                    963: 
1.47    ! anton     964: fp!    ( f_addr -- )   gforth  fp_store
1.1       anton     965: fp = f_addr;
                    966: 
1.15      pazsan    967: \+
1.1       anton     968: 
1.47    ! anton     969: ;s     ( -- )          gforth  semis
1.22      crook     970: ""The primitive compiled by @code{EXIT}.""
1.23      anton     971: SET_IP((Xt *)(*rp++));
1.1       anton     972: 
1.47    ! anton     973: >r     ( w -- )                core    to_r
1.1       anton     974: *--rp = w;
                    975: :
                    976:  (>r) ;
                    977: : (>r)  rp@ cell+ @ rp@ ! rp@ cell+ ! ;
                    978: 
1.47    ! anton     979: r>     ( -- w )                core    r_from
1.1       anton     980: w = *rp++;
                    981: :
                    982:  rp@ cell+ @ rp@ @ rp@ cell+ ! (rdrop) rp@ ! ;
                    983: Create (rdrop) ' ;s A,
                    984: 
1.47    ! anton     985: rdrop  ( -- )          gforth
1.1       anton     986: rp++;
                    987: :
                    988:  r> r> drop >r ;
                    989: 
1.47    ! anton     990: 2>r    ( w1 w2 -- )    core-ext        two_to_r
1.1       anton     991: *--rp = w1;
                    992: *--rp = w2;
                    993: :
                    994:  swap r> swap >r swap >r >r ;
                    995: 
1.47    ! anton     996: 2r>    ( -- w1 w2 )    core-ext        two_r_from
1.1       anton     997: w2 = *rp++;
                    998: w1 = *rp++;
                    999: :
                   1000:  r> r> swap r> swap >r swap ;
                   1001: 
1.47    ! anton    1002: 2r@    ( -- w1 w2 )    core-ext        two_r_fetch
1.1       anton    1003: w2 = rp[0];
                   1004: w1 = rp[1];
                   1005: :
                   1006:  i' j ;
                   1007: 
1.47    ! anton    1008: 2rdrop ( -- )          gforth  two_r_drop
1.1       anton    1009: rp+=2;
                   1010: :
                   1011:  r> r> drop r> drop >r ;
                   1012: 
1.47    ! anton    1013: over   ( w1 w2 -- w1 w2 w1 )           core
1.1       anton    1014: :
                   1015:  sp@ cell+ @ ;
                   1016: 
1.47    ! anton    1017: drop   ( w -- )                core
1.1       anton    1018: :
                   1019:  IF THEN ;
                   1020: 
1.47    ! anton    1021: swap   ( w1 w2 -- w2 w1 )              core
1.1       anton    1022: :
                   1023:  >r (swap) ! r> (swap) @ ;
                   1024: Variable (swap)
                   1025: 
1.47    ! anton    1026: dup    ( w -- w w )            core    dupe
1.1       anton    1027: :
                   1028:  sp@ @ ;
                   1029: 
1.47    ! anton    1030: rot    ( w1 w2 w3 -- w2 w3 w1 )        core    rote
1.1       anton    1031: :
                   1032: [ defined? (swap) [IF] ]
                   1033:     (swap) ! (rot) ! >r (rot) @ (swap) @ r> ;
                   1034: Variable (rot)
                   1035: [ELSE] ]
                   1036:     >r swap r> swap ;
                   1037: [THEN]
                   1038: 
1.47    ! anton    1039: -rot   ( w1 w2 w3 -- w3 w1 w2 )        gforth  not_rote
1.1       anton    1040: :
                   1041:  rot rot ;
                   1042: 
1.47    ! anton    1043: nip    ( w1 w2 -- w2 )         core-ext
1.1       anton    1044: :
1.6       jwilke   1045:  swap drop ;
1.1       anton    1046: 
1.47    ! anton    1047: tuck   ( w1 w2 -- w2 w1 w2 )   core-ext
1.1       anton    1048: :
                   1049:  swap over ;
                   1050: 
1.47    ! anton    1051: ?dup   ( w -- w )                      core    question_dupe
1.1       anton    1052: if (w!=0) {
                   1053:   IF_TOS(*sp-- = w;)
                   1054: #ifndef USE_TOS
                   1055:   *--sp = w;
                   1056: #endif
                   1057: }
                   1058: :
                   1059:  dup IF dup THEN ;
                   1060: 
1.47    ! anton    1061: pick   ( u -- w )                      core-ext
1.1       anton    1062: w = sp[u+1];
                   1063: :
                   1064:  1+ cells sp@ + @ ;
                   1065: 
1.47    ! anton    1066: 2drop  ( w1 w2 -- )            core    two_drop
1.1       anton    1067: :
                   1068:  drop drop ;
                   1069: 
1.47    ! anton    1070: 2dup   ( w1 w2 -- w1 w2 w1 w2 )        core    two_dupe
1.1       anton    1071: :
                   1072:  over over ;
                   1073: 
1.47    ! anton    1074: 2over  ( w1 w2 w3 w4 -- w1 w2 w3 w4 w1 w2 )    core    two_over
1.1       anton    1075: :
                   1076:  3 pick 3 pick ;
                   1077: 
1.47    ! anton    1078: 2swap  ( w1 w2 w3 w4 -- w3 w4 w1 w2 )  core    two_swap
1.1       anton    1079: :
                   1080:  rot >r rot r> ;
                   1081: 
1.47    ! anton    1082: 2rot   ( w1 w2 w3 w4 w5 w6 -- w3 w4 w5 w6 w1 w2 )      double-ext      two_rote
1.1       anton    1083: :
                   1084:  >r >r 2swap r> r> 2swap ;
                   1085: 
1.47    ! anton    1086: 2nip   ( w1 w2 w3 w4 -- w3 w4 )        gforth  two_nip
1.1       anton    1087: :
                   1088:  2swap 2drop ;
                   1089: 
1.47    ! anton    1090: 2tuck  ( w1 w2 w3 w4 -- w3 w4 w1 w2 w3 w4 )    gforth  two_tuck
1.1       anton    1091: :
                   1092:  2swap 2over ;
                   1093: 
                   1094: \ toggle is high-level: 0.11/0.42%
                   1095: 
1.47    ! anton    1096: @      ( a_addr -- w )         core    fetch
1.29      crook    1097: "" Read from the cell at address @i{a-addr}, and return its contents, @i{w}.""
1.1       anton    1098: w = *a_addr;
                   1099: 
1.47    ! anton    1100: !      ( w a_addr -- )         core    store
1.29      crook    1101: "" Write the value @i{w} to the cell at address @i{a-addr}.""
1.1       anton    1102: *a_addr = w;
                   1103: 
1.47    ! anton    1104: +!     ( n a_addr -- )         core    plus_store
1.29      crook    1105: "" Add @i{n} to the value stored in the cell at address @i{a-addr}.""
1.1       anton    1106: *a_addr += n;
                   1107: :
                   1108:  tuck @ + swap ! ;
                   1109: 
1.47    ! anton    1110: c@     ( c_addr -- c )         core    c_fetch
1.29      crook    1111: "" Read from the char at address @i{c-addr}, and return its contents, @i{c}.""
1.1       anton    1112: c = *c_addr;
                   1113: :
                   1114: [ bigendian [IF] ]
                   1115:     [ cell>bit 4 = [IF] ]
                   1116:        dup [ 0 cell - ] Literal and @ swap 1 and
                   1117:        IF  $FF and  ELSE  8>>  THEN  ;
                   1118:     [ [ELSE] ]
                   1119:        dup [ cell 1- ] literal and
                   1120:        tuck - @ swap [ cell 1- ] literal xor
                   1121:        0 ?DO 8>> LOOP $FF and
                   1122:     [ [THEN] ]
                   1123: [ [ELSE] ]
                   1124:     [ cell>bit 4 = [IF] ]
                   1125:        dup [ 0 cell - ] Literal and @ swap 1 and
                   1126:        IF  8>>  ELSE  $FF and  THEN
                   1127:     [ [ELSE] ]
                   1128:        dup [ cell  1- ] literal and 
                   1129:        tuck - @ swap
                   1130:        0 ?DO 8>> LOOP 255 and
                   1131:     [ [THEN] ]
                   1132: [ [THEN] ]
                   1133: ;
                   1134: : 8>> 2/ 2/ 2/ 2/  2/ 2/ 2/ 2/ ;
                   1135: 
1.47    ! anton    1136: c!     ( c c_addr -- )         core    c_store
1.29      crook    1137: "" Write the value @i{c} to the char at address @i{c-addr}.""
1.1       anton    1138: *c_addr = c;
                   1139: :
                   1140: [ bigendian [IF] ]
                   1141:     [ cell>bit 4 = [IF] ]
                   1142:        tuck 1 and IF  $FF and  ELSE  8<<  THEN >r
                   1143:        dup -2 and @ over 1 and cells masks + @ and
                   1144:        r> or swap -2 and ! ;
                   1145:        Create masks $00FF , $FF00 ,
                   1146:     [ELSE] ]
                   1147:        dup [ cell 1- ] literal and dup 
                   1148:        [ cell 1- ] literal xor >r
                   1149:        - dup @ $FF r@ 0 ?DO 8<< LOOP invert and
                   1150:        rot $FF and r> 0 ?DO 8<< LOOP or swap ! ;
                   1151:     [THEN]
                   1152: [ELSE] ]
                   1153:     [ cell>bit 4 = [IF] ]
                   1154:        tuck 1 and IF  8<<  ELSE  $FF and  THEN >r
                   1155:        dup -2 and @ over 1 and cells masks + @ and
                   1156:        r> or swap -2 and ! ;
                   1157:        Create masks $FF00 , $00FF ,
                   1158:     [ELSE] ]
                   1159:        dup [ cell 1- ] literal and dup >r
                   1160:        - dup @ $FF r@ 0 ?DO 8<< LOOP invert and
                   1161:        rot $FF and r> 0 ?DO 8<< LOOP or swap ! ;
                   1162:     [THEN]
                   1163: [THEN]
                   1164: : 8<< 2* 2* 2* 2*  2* 2* 2* 2* ;
                   1165: 
1.47    ! anton    1166: 2!     ( w1 w2 a_addr -- )             core    two_store
1.29      crook    1167: "" Write the value @i{w1, w2} to the double at address @i{a-addr}.""
1.1       anton    1168: a_addr[0] = w2;
                   1169: a_addr[1] = w1;
                   1170: :
                   1171:  tuck ! cell+ ! ;
                   1172: 
1.47    ! anton    1173: 2@     ( a_addr -- w1 w2 )             core    two_fetch
1.29      crook    1174: "" Read from the double at address @i{a-addr}, and return its contents, @i{w1, w2}.""
1.1       anton    1175: w2 = a_addr[0];
                   1176: w1 = a_addr[1];
                   1177: :
                   1178:  dup cell+ @ swap @ ;
                   1179: 
1.47    ! anton    1180: cell+  ( a_addr1 -- a_addr2 )  core    cell_plus
1.29      crook    1181: "" Increment @i{a-addr1} by the number of address units corresponding to the size of
                   1182: one cell, to give @i{a-addr2}.""
1.1       anton    1183: a_addr2 = a_addr1+1;
                   1184: :
                   1185:  cell + ;
                   1186: 
1.47    ! anton    1187: cells  ( n1 -- n2 )            core
1.29      crook    1188: "" @i{n2} is the number of address units corresponding to @i{n1} cells.""
1.1       anton    1189: n2 = n1 * sizeof(Cell);
                   1190: :
                   1191:  [ cell
                   1192:  2/ dup [IF] ] 2* [ [THEN]
                   1193:  2/ dup [IF] ] 2* [ [THEN]
                   1194:  2/ dup [IF] ] 2* [ [THEN]
                   1195:  2/ dup [IF] ] 2* [ [THEN]
                   1196:  drop ] ;
                   1197: 
1.47    ! anton    1198: char+  ( c_addr1 -- c_addr2 )  core    char_plus
1.29      crook    1199: "" Increment @i{c-addr1} by the number of address units corresponding to the size of
                   1200: one char, to give @i{c-addr2}.""
1.1       anton    1201: c_addr2 = c_addr1 + 1;
                   1202: :
                   1203:  1+ ;
                   1204: 
1.47    ! anton    1205: (chars)        ( n1 -- n2 )    gforth  paren_chars
1.1       anton    1206: n2 = n1 * sizeof(Char);
                   1207: :
                   1208:  ;
                   1209: 
1.47    ! anton    1210: count  ( c_addr1 -- c_addr2 u )        core
1.29      crook    1211: "" If @i{c-add1} is the address of a counted string return the length of
                   1212: the string, @i{u}, and the address of its first character, @i{c-addr2}.""
1.1       anton    1213: u = *c_addr1;
                   1214: c_addr2 = c_addr1+1;
                   1215: :
                   1216:  dup 1+ swap c@ ;
                   1217: 
1.47    ! anton    1218: (f83find)      ( c_addr u f83name1 -- f83name2 )       new     paren_f83find
1.13      pazsan   1219: for (; f83name1 != NULL; f83name1 = (struct F83Name *)(f83name1->next))
1.1       anton    1220:   if ((UCell)F83NAME_COUNT(f83name1)==u &&
                   1221:       memcasecmp(c_addr, f83name1->name, u)== 0 /* or inline? */)
                   1222:     break;
                   1223: f83name2=f83name1;
                   1224: :
                   1225:     BEGIN  dup WHILE  (find-samelen)  dup  WHILE
                   1226:        >r 2dup r@ cell+ char+ capscomp  0=
                   1227:        IF  2drop r>  EXIT  THEN
                   1228:        r> @
                   1229:     REPEAT  THEN  nip nip ;
                   1230: : (find-samelen) ( u f83name1 -- u f83name2/0 )
                   1231:     BEGIN  2dup cell+ c@ $1F and <> WHILE  @  dup 0= UNTIL  THEN ;
                   1232: 
1.15      pazsan   1233: \+hash
1.1       anton    1234: 
1.47    ! anton    1235: (hashfind)     ( c_addr u a_addr -- f83name2 ) new     paren_hashfind
1.13      pazsan   1236: struct F83Name *f83name1;
1.1       anton    1237: f83name2=NULL;
                   1238: while(a_addr != NULL)
                   1239: {
1.13      pazsan   1240:    f83name1=(struct F83Name *)(a_addr[1]);
1.1       anton    1241:    a_addr=(Cell *)(a_addr[0]);
                   1242:    if ((UCell)F83NAME_COUNT(f83name1)==u &&
                   1243:        memcasecmp(c_addr, f83name1->name, u)== 0 /* or inline? */)
                   1244:      {
                   1245:        f83name2=f83name1;
                   1246:        break;
                   1247:      }
                   1248: }
                   1249: :
                   1250:  BEGIN  dup  WHILE
                   1251:         2@ >r >r dup r@ cell+ c@ $1F and =
                   1252:         IF  2dup r@ cell+ char+ capscomp 0=
                   1253:            IF  2drop r> rdrop  EXIT  THEN  THEN
                   1254:        rdrop r>
                   1255:  REPEAT nip nip ;
                   1256: 
1.47    ! anton    1257: (tablefind)    ( c_addr u a_addr -- f83name2 ) new     paren_tablefind
1.1       anton    1258: ""A case-sensitive variant of @code{(hashfind)}""
1.13      pazsan   1259: struct F83Name *f83name1;
1.1       anton    1260: f83name2=NULL;
                   1261: while(a_addr != NULL)
                   1262: {
1.13      pazsan   1263:    f83name1=(struct F83Name *)(a_addr[1]);
1.1       anton    1264:    a_addr=(Cell *)(a_addr[0]);
                   1265:    if ((UCell)F83NAME_COUNT(f83name1)==u &&
                   1266:        memcmp(c_addr, f83name1->name, u)== 0 /* or inline? */)
                   1267:      {
                   1268:        f83name2=f83name1;
                   1269:        break;
                   1270:      }
                   1271: }
                   1272: :
                   1273:  BEGIN  dup  WHILE
                   1274:         2@ >r >r dup r@ cell+ c@ $1F and =
                   1275:         IF  2dup r@ cell+ char+ -text 0=
                   1276:            IF  2drop r> rdrop  EXIT  THEN  THEN
                   1277:        rdrop r>
                   1278:  REPEAT nip nip ;
                   1279: 
1.47    ! anton    1280: (hashkey)      ( c_addr u1 -- u2 )             gforth  paren_hashkey
1.1       anton    1281: u2=0;
                   1282: while(u1--)
                   1283:    u2+=(Cell)toupper(*c_addr++);
                   1284: :
                   1285:  0 -rot bounds ?DO  I c@ toupper +  LOOP ;
                   1286: 
1.47    ! anton    1287: (hashkey1)     ( c_addr u ubits -- ukey )              gforth  paren_hashkey1
1.1       anton    1288: ""ukey is the hash key for the string c_addr u fitting in ubits bits""
                   1289: /* this hash function rotates the key at every step by rot bits within
                   1290:    ubits bits and xors it with the character. This function does ok in
                   1291:    the chi-sqare-test.  Rot should be <=7 (preferably <=5) for
                   1292:    ASCII strings (larger if ubits is large), and should share no
                   1293:    divisors with ubits.
                   1294: */
                   1295: unsigned rot = ((char []){5,0,1,2,3,4,5,5,5,5,3,5,5,5,5,7,5,5,5,5,7,5,5,5,5,6,5,5,5,5,7,5,5})[ubits];
                   1296: Char *cp = c_addr;
                   1297: for (ukey=0; cp<c_addr+u; cp++)
                   1298:     ukey = ((((ukey<<rot) | (ukey>>(ubits-rot))) 
                   1299:             ^ toupper(*cp))
                   1300:            & ((1<<ubits)-1));
                   1301: :
                   1302:  dup rot-values + c@ over 1 swap lshift 1- >r
                   1303:  tuck - 2swap r> 0 2swap bounds
                   1304:  ?DO  dup 4 pick lshift swap 3 pick rshift or
                   1305:       I c@ toupper xor
                   1306:       over and  LOOP
                   1307:  nip nip nip ;
                   1308: Create rot-values
                   1309:   5 c, 0 c, 1 c, 2 c, 3 c,  4 c, 5 c, 5 c, 5 c, 5 c,
                   1310:   3 c, 5 c, 5 c, 5 c, 5 c,  7 c, 5 c, 5 c, 5 c, 5 c,
                   1311:   7 c, 5 c, 5 c, 5 c, 5 c,  6 c, 5 c, 5 c, 5 c, 5 c,
                   1312:   7 c, 5 c, 5 c,
                   1313: 
1.15      pazsan   1314: \+
1.1       anton    1315: 
1.47    ! anton    1316: (parse-white)  ( c_addr1 u1 -- c_addr2 u2 )    gforth  paren_parse_white
1.1       anton    1317: /* use !isgraph instead of isspace? */
                   1318: Char *endp = c_addr1+u1;
                   1319: while (c_addr1<endp && isspace(*c_addr1))
                   1320:   c_addr1++;
                   1321: if (c_addr1<endp) {
                   1322:   for (c_addr2 = c_addr1; c_addr1<endp && !isspace(*c_addr1); c_addr1++)
                   1323:     ;
                   1324:   u2 = c_addr1-c_addr2;
                   1325: }
                   1326: else {
                   1327:   c_addr2 = c_addr1;
                   1328:   u2 = 0;
                   1329: }
                   1330: :
                   1331:  BEGIN  dup  WHILE  over c@ bl <=  WHILE  1 /string
                   1332:  REPEAT  THEN  2dup
                   1333:  BEGIN  dup  WHILE  over c@ bl >   WHILE  1 /string
                   1334:  REPEAT  THEN  nip - ;
                   1335: 
1.47    ! anton    1336: aligned        ( c_addr -- a_addr )    core
1.29      crook    1337: "" @i{a-addr} is the first aligned address greater than or equal to @i{c-addr}.""
1.1       anton    1338: a_addr = (Cell *)((((Cell)c_addr)+(sizeof(Cell)-1))&(-sizeof(Cell)));
                   1339: :
                   1340:  [ cell 1- ] Literal + [ -1 cells ] Literal and ;
                   1341: 
1.47    ! anton    1342: faligned       ( c_addr -- f_addr )    float   f_aligned
1.29      crook    1343: "" @i{f-addr} is the first float-aligned address greater than or equal to @i{c-addr}.""
1.1       anton    1344: f_addr = (Float *)((((Cell)c_addr)+(sizeof(Float)-1))&(-sizeof(Float)));
                   1345: :
                   1346:  [ 1 floats 1- ] Literal + [ -1 floats ] Literal and ;
                   1347: 
1.47    ! anton    1348: >body  ( xt -- a_addr )        core    to_body
1.40      crook    1349: "" Get the address of the body of the word represented by @i{xt} (the address
                   1350: of the word's data field).""
1.1       anton    1351: a_addr = PFA(xt);
                   1352: :
                   1353:     2 cells + ;
                   1354: 
1.35      jwilke   1355: \ threading stuff is currently only interesting if we have a compiler
                   1356: \fhas? standardthreading has? compiler and [IF]
1.28      jwilke   1357: 
1.47    ! anton    1358: >code-address  ( xt -- c_addr )                gforth  to_code_address
1.29      crook    1359: ""@i{c-addr} is the code address of the word @i{xt}.""
1.1       anton    1360: /* !! This behaves installation-dependently for DOES-words */
                   1361: c_addr = (Address)CODE_ADDRESS(xt);
                   1362: :
                   1363:     @ ;
                   1364: 
1.47    ! anton    1365: >does-code     ( xt -- a_addr )                gforth  to_does_code
1.29      crook    1366: ""If @i{xt} is the execution token of a defining-word-defined word,
                   1367: @i{a-addr} is the start of the Forth code after the @code{DOES>};
                   1368: Otherwise @i{a-addr} is 0.""
1.1       anton    1369: a_addr = (Cell *)DOES_CODE(xt);
                   1370: :
                   1371:     cell+ @ ;
                   1372: 
1.47    ! anton    1373: code-address!  ( c_addr xt -- )                gforth  code_address_store
1.29      crook    1374: ""Create a code field with code address @i{c-addr} at @i{xt}.""
1.1       anton    1375: MAKE_CF(xt, c_addr);
1.10      anton    1376: CACHE_FLUSH(xt,(size_t)PFA(0));
1.1       anton    1377: :
                   1378:     ! ;
                   1379: 
1.47    ! anton    1380: does-code!     ( a_addr xt -- )                gforth  does_code_store
1.29      crook    1381: ""Create a code field at @i{xt} for a defining-word-defined word; @i{a-addr}
1.26      crook    1382: is the start of the Forth code after @code{DOES>}.""
1.1       anton    1383: MAKE_DOES_CF(xt, a_addr);
1.10      anton    1384: CACHE_FLUSH(xt,(size_t)PFA(0));
1.1       anton    1385: :
                   1386:     dodoes: over ! cell+ ! ;
                   1387: 
1.47    ! anton    1388: does-handler!  ( a_addr -- )   gforth  does_handler_store
1.29      crook    1389: ""Create a @code{DOES>}-handler at address @i{a-addr}. Usually, @i{a-addr} points
1.26      crook    1390: just behind a @code{DOES>}.""
1.1       anton    1391: MAKE_DOES_HANDLER(a_addr);
1.10      anton    1392: CACHE_FLUSH((caddr_t)a_addr,DOES_HANDLER_SIZE);
1.1       anton    1393: :
                   1394:     drop ;
                   1395: 
1.47    ! anton    1396: /does-handler  ( -- n )        gforth  slash_does_handler
1.26      crook    1397: ""The size of a @code{DOES>}-handler (includes possible padding).""
1.1       anton    1398: /* !! a constant or environmental query might be better */
                   1399: n = DOES_HANDLER_SIZE;
                   1400: :
                   1401:     2 cells ;
                   1402: 
1.47    ! anton    1403: threading-method       ( -- n )        gforth  threading_method
1.1       anton    1404: ""0 if the engine is direct threaded. Note that this may change during
                   1405: the lifetime of an image.""
                   1406: #if defined(DOUBLY_INDIRECT)
                   1407: n=2;
                   1408: #else
                   1409: # if defined(DIRECT_THREADED)
                   1410: n=0;
                   1411: # else
                   1412: n=1;
                   1413: # endif
                   1414: #endif
                   1415: :
                   1416:  1 ;
1.28      jwilke   1417: 
1.35      jwilke   1418: \f[THEN]
1.1       anton    1419: 
1.47    ! anton    1420: key-file       ( wfileid -- n )                gforth  paren_key_file
1.17      pazsan   1421: #ifdef HAS_FILE
1.1       anton    1422: fflush(stdout);
1.12      pazsan   1423: n = key((FILE*)wfileid);
1.17      pazsan   1424: #else
                   1425: n = key(stdin);
                   1426: #endif
1.1       anton    1427: 
1.47    ! anton    1428: key?-file      ( wfileid -- n )                facility        key_q_file
1.17      pazsan   1429: #ifdef HAS_FILE
1.1       anton    1430: fflush(stdout);
1.12      pazsan   1431: n = key_query((FILE*)wfileid);
1.17      pazsan   1432: #else
                   1433: n = key_query(stdin);
                   1434: #endif
                   1435: 
                   1436: \+os
1.12      pazsan   1437: 
1.47    ! anton    1438: stdin  ( -- wfileid )  gforth
1.12      pazsan   1439: wfileid = (Cell)stdin;
1.1       anton    1440: 
1.47    ! anton    1441: stdout ( -- wfileid )  gforth
1.1       anton    1442: wfileid = (Cell)stdout;
                   1443: 
1.47    ! anton    1444: stderr ( -- wfileid )  gforth
1.1       anton    1445: wfileid = (Cell)stderr;
                   1446: 
1.47    ! anton    1447: form   ( -- urows ucols )      gforth
1.1       anton    1448: ""The number of lines and columns in the terminal. These numbers may change
                   1449: with the window size.""
                   1450: /* we could block SIGWINCH here to get a consistent size, but I don't
                   1451:  think this is necessary or always beneficial */
                   1452: urows=rows;
                   1453: ucols=cols;
                   1454: 
1.47    ! anton    1455: flush-icache   ( c_addr u -- ) gforth  flush_icache
1.1       anton    1456: ""Make sure that the instruction cache of the processor (if there is
1.29      crook    1457: one) does not contain stale data at @i{c-addr} and @i{u} bytes
1.1       anton    1458: afterwards. @code{END-CODE} performs a @code{flush-icache}
                   1459: automatically. Caveat: @code{flush-icache} might not work on your
                   1460: installation; this is usually the case if direct threading is not
                   1461: supported on your machine (take a look at your @file{machine.h}) and
                   1462: your machine has a separate instruction cache. In such cases,
                   1463: @code{flush-icache} does nothing instead of flushing the instruction
                   1464: cache.""
                   1465: FLUSH_ICACHE(c_addr,u);
                   1466: 
1.47    ! anton    1467: (bye)  ( n -- )        gforth  paren_bye
1.1       anton    1468: return (Label *)n;
                   1469: 
1.47    ! anton    1470: (system)       ( c_addr u -- wretval wior )    gforth  peren_system
1.20      pazsan   1471: #ifndef MSDOS
1.1       anton    1472: int old_tp=terminal_prepped;
                   1473: deprep_terminal();
1.20      pazsan   1474: #endif
1.1       anton    1475: wretval=system(cstr(c_addr,u,1)); /* ~ expansion on first part of string? */
                   1476: wior = IOR(wretval==-1 || (wretval==127 && errno != 0));
1.20      pazsan   1477: #ifndef MSDOS
1.1       anton    1478: if (old_tp)
                   1479:   prep_terminal();
1.20      pazsan   1480: #endif
1.1       anton    1481: 
1.47    ! anton    1482: getenv ( c_addr1 u1 -- c_addr2 u2 )    gforth
1.29      crook    1483: ""The string @i{c-addr1 u1} specifies an environment variable. The string @i{c-addr2 u2}
1.24      crook    1484: is the host operating system's expansion of that environment variable. If the
1.29      crook    1485: environment variable does not exist, @i{c-addr2 u2} specifies a string 0 characters
1.24      crook    1486: in length.""
1.46      pazsan   1487: /* close ' to keep fontify happy */
1.1       anton    1488: c_addr2 = getenv(cstr(c_addr1,u1,1));
                   1489: u2 = (c_addr2 == NULL ? 0 : strlen(c_addr2));
                   1490: 
1.47    ! anton    1491: open-pipe      ( c_addr u ntype -- wfileid wior )      gforth  open_pipe
1.1       anton    1492: wfileid=(Cell)popen(cstr(c_addr,u,1),fileattr[ntype]); /* ~ expansion of 1st arg? */
                   1493: wior = IOR(wfileid==0); /* !! the man page says that errno is not set reliably */
                   1494: 
1.47    ! anton    1495: close-pipe     ( wfileid -- wretval wior )             gforth  close_pipe
1.1       anton    1496: wretval = pclose((FILE *)wfileid);
                   1497: wior = IOR(wretval==-1);
                   1498: 
1.47    ! anton    1499: time&date      ( -- nsec nmin nhour nday nmonth nyear )        facility-ext    time_and_date
1.44      crook    1500: ""Report the current time of day. Seconds, minutes and hours are numbered from 0.
                   1501: Months are numbered from 1.""
1.1       anton    1502: struct timeval time1;
                   1503: struct timezone zone1;
                   1504: struct tm *ltime;
                   1505: gettimeofday(&time1,&zone1);
                   1506: ltime=localtime((time_t *)&time1.tv_sec);
                   1507: nyear =ltime->tm_year+1900;
                   1508: nmonth=ltime->tm_mon+1;
                   1509: nday  =ltime->tm_mday;
                   1510: nhour =ltime->tm_hour;
                   1511: nmin  =ltime->tm_min;
                   1512: nsec  =ltime->tm_sec;
                   1513: 
1.47    ! anton    1514: ms     ( n -- )        facility-ext
1.44      crook    1515: ""Wait at least @i{n} milli-second.""
1.1       anton    1516: struct timeval timeout;
                   1517: timeout.tv_sec=n/1000;
                   1518: timeout.tv_usec=1000*(n%1000);
                   1519: (void)select(0,0,0,0,&timeout);
                   1520: 
1.47    ! anton    1521: allocate       ( u -- a_addr wior )    memory
1.29      crook    1522: ""Allocate @i{u} address units of contiguous data space. The initial
1.27      crook    1523: contents of the data space is undefined. If the allocation is successful,
1.29      crook    1524: @i{a-addr} is the start address of the allocated region and @i{wior}
                   1525: is 0. If the allocation fails, @i{a-addr} is undefined and @i{wior}
1.27      crook    1526: is an implementation-defined I/O result code.""
1.1       anton    1527: a_addr = (Cell *)malloc(u?u:1);
                   1528: wior = IOR(a_addr==NULL);
                   1529: 
1.47    ! anton    1530: free   ( a_addr -- wior )              memory
1.29      crook    1531: ""Return the region of data space starting at @i{a-addr} to the system.
1.27      crook    1532: The regon must originally have been obtained using @code{allocate} or
1.29      crook    1533: @code{resize}. If the operational is successful, @i{wior} is 0.
                   1534: If the operation fails, @i{wior} is an implementation-defined
1.27      crook    1535: I/O result code.""
1.1       anton    1536: free(a_addr);
                   1537: wior = 0;
                   1538: 
1.47    ! anton    1539: resize ( a_addr1 u -- a_addr2 wior )   memory
1.26      crook    1540: ""Change the size of the allocated area at @i{a-addr1} to @i{u}
1.1       anton    1541: address units, possibly moving the contents to a different
1.27      crook    1542: area. @i{a-addr2} is the address of the resulting area.
1.29      crook    1543: If the operational is successful, @i{wior} is 0.
                   1544: If the operation fails, @i{wior} is an implementation-defined
                   1545: I/O result code. If @i{a-addr1} is 0, Gforth's (but not the Standard)
1.27      crook    1546: @code{resize} @code{allocate}s @i{u} address units.""
1.1       anton    1547: /* the following check is not necessary on most OSs, but it is needed
                   1548:    on SunOS 4.1.2. */
1.46      pazsan   1549: /* close ' to keep fontify happy */
1.1       anton    1550: if (a_addr1==NULL)
                   1551:   a_addr2 = (Cell *)malloc(u);
                   1552: else
                   1553:   a_addr2 = (Cell *)realloc(a_addr1, u);
                   1554: wior = IOR(a_addr2==NULL);     /* !! Define a return code */
                   1555: 
1.47    ! anton    1556: strerror       ( n -- c_addr u )       gforth
1.1       anton    1557: c_addr = strerror(n);
                   1558: u = strlen(c_addr);
                   1559: 
1.47    ! anton    1560: strsignal      ( n -- c_addr u )       gforth
1.1       anton    1561: c_addr = strsignal(n);
                   1562: u = strlen(c_addr);
                   1563: 
1.47    ! anton    1564: call-c ( w -- )        gforth  call_c
1.1       anton    1565: ""Call the C function pointed to by @i{w}. The C function has to
                   1566: access the stack itself. The stack pointers are exported in the global
                   1567: variables @code{SP} and @code{FP}.""
                   1568: /* This is a first attempt at support for calls to C. This may change in
                   1569:    the future */
                   1570: IF_FTOS(fp[0]=FTOS);
                   1571: FP=fp;
                   1572: SP=sp;
                   1573: ((void (*)())w)();
                   1574: sp=SP;
                   1575: fp=FP;
                   1576: IF_TOS(TOS=sp[0]);
                   1577: IF_FTOS(FTOS=fp[0]);
                   1578: 
1.15      pazsan   1579: \+
                   1580: \+file
1.1       anton    1581: 
1.47    ! anton    1582: close-file     ( wfileid -- wior )             file    close_file
1.1       anton    1583: wior = IOR(fclose((FILE *)wfileid)==EOF);
                   1584: 
1.47    ! anton    1585: open-file      ( c_addr u ntype -- wfileid wior )      file    open_file
1.22      crook    1586: wfileid = (Cell)fopen(tilde_cstr(c_addr, u, 1), fileattr[ntype]);
1.14      pazsan   1587: #if defined(GO32) && defined(MSDOS)
1.22      crook    1588: if(wfileid && !(ntype & 1))
                   1589:   setbuf((FILE*)wfileid, NULL);
1.14      pazsan   1590: #endif
1.22      crook    1591: wior =  IOR(wfileid == 0);
1.1       anton    1592: 
1.47    ! anton    1593: create-file    ( c_addr u ntype -- wfileid wior )      file    create_file
1.1       anton    1594: Cell   fd;
                   1595: fd = open(tilde_cstr(c_addr, u, 1), O_CREAT|O_TRUNC|ufileattr[ntype], 0666);
                   1596: if (fd != -1) {
1.22      crook    1597:   wfileid = (Cell)fdopen(fd, fileattr[ntype]);
1.14      pazsan   1598: #if defined(GO32) && defined(MSDOS)
1.22      crook    1599:   if(wfileid && !(ntype & 1))
                   1600:     setbuf((FILE*)wfileid, NULL);
1.14      pazsan   1601: #endif
1.22      crook    1602:   wior = IOR(wfileid == 0);
1.1       anton    1603: } else {
1.22      crook    1604:   wfileid = 0;
1.1       anton    1605:   wior = IOR(1);
                   1606: }
                   1607: 
1.47    ! anton    1608: delete-file    ( c_addr u -- wior )            file    delete_file
1.1       anton    1609: wior = IOR(unlink(tilde_cstr(c_addr, u, 1))==-1);
                   1610: 
1.47    ! anton    1611: rename-file    ( c_addr1 u1 c_addr2 u2 -- wior )       file-ext        rename_file
1.29      crook    1612: ""Rename file @i{c_addr1 u1} to new name @i{c_addr2 u2}""
1.1       anton    1613: char *s1=tilde_cstr(c_addr2, u2, 1);
                   1614: wior = IOR(rename(tilde_cstr(c_addr1, u1, 0), s1)==-1);
                   1615: 
1.47    ! anton    1616: file-position  ( wfileid -- ud wior )  file    file_position
1.1       anton    1617: /* !! use tell and lseek? */
                   1618: ud = LONG2UD(ftell((FILE *)wfileid));
                   1619: wior = IOR(UD2LONG(ud)==-1);
                   1620: 
1.47    ! anton    1621: reposition-file        ( ud wfileid -- wior )  file    reposition_file
1.1       anton    1622: wior = IOR(fseek((FILE *)wfileid, UD2LONG(ud), SEEK_SET)==-1);
                   1623: 
1.47    ! anton    1624: file-size      ( wfileid -- ud wior )  file    file_size
1.1       anton    1625: struct stat buf;
                   1626: wior = IOR(fstat(fileno((FILE *)wfileid), &buf)==-1);
                   1627: ud = LONG2UD(buf.st_size);
                   1628: 
1.47    ! anton    1629: resize-file    ( ud wfileid -- wior )  file    resize_file
1.1       anton    1630: wior = IOR(ftruncate(fileno((FILE *)wfileid), UD2LONG(ud))==-1);
                   1631: 
1.47    ! anton    1632: read-file      ( c_addr u1 wfileid -- u2 wior )        file    read_file
1.1       anton    1633: /* !! fread does not guarantee enough */
                   1634: u2 = fread(c_addr, sizeof(Char), u1, (FILE *)wfileid);
                   1635: wior = FILEIO(u2<u1 && ferror((FILE *)wfileid));
                   1636: /* !! is the value of ferror errno-compatible? */
                   1637: if (wior)
                   1638:   clearerr((FILE *)wfileid);
                   1639: 
1.47    ! anton    1640: read-line      ( c_addr u1 wfileid -- u2 flag wior )   file    read_line
1.45      anton    1641: #if 1
1.1       anton    1642: Cell c;
                   1643: flag=-1;
                   1644: for(u2=0; u2<u1; u2++)
                   1645: {
1.45      anton    1646:    c = getc((FILE *)wfileid);
                   1647:    if (c=='\n') break;
                   1648:    if (c=='\r') {
                   1649:      if ((c = getc((FILE *)wfileid))!='\n')
                   1650:        ungetc(c,(FILE *)wfileid);
                   1651:      break;
                   1652:    }
                   1653:    if (c==EOF) {
1.1       anton    1654:        flag=FLAG(u2!=0);
                   1655:        break;
                   1656:      }
1.45      anton    1657:    c_addr[u2] = (Char)c;
1.1       anton    1658: }
                   1659: wior=FILEIO(ferror((FILE *)wfileid));
1.45      anton    1660: #else
1.1       anton    1661: if ((flag=FLAG(!feof((FILE *)wfileid) &&
                   1662:               fgets(c_addr,u1+1,(FILE *)wfileid) != NULL))) {
1.30      anton    1663:   wior=FILEIO(ferror((FILE *)wfileid)!=0); /* !! ior? */
1.1       anton    1664:   if (wior)
                   1665:     clearerr((FILE *)wfileid);
                   1666:   u2 = strlen(c_addr);
                   1667:   u2-=((u2>0) && (c_addr[u2-1]==NEWLINE));
                   1668: }
                   1669: else {
                   1670:   wior=0;
                   1671:   u2=0;
                   1672: }
1.45      anton    1673: #endif
1.1       anton    1674: 
1.15      pazsan   1675: \+
1.1       anton    1676: 
1.47    ! anton    1677: write-file     ( c_addr u1 wfileid -- wior )   file    write_file
1.1       anton    1678: /* !! fwrite does not guarantee enough */
1.39      pazsan   1679: #ifdef HAS_FILE
1.1       anton    1680: {
                   1681:   UCell u2 = fwrite(c_addr, sizeof(Char), u1, (FILE *)wfileid);
                   1682:   wior = FILEIO(u2<u1 && ferror((FILE *)wfileid));
                   1683:   if (wior)
                   1684:     clearerr((FILE *)wfileid);
                   1685: }
1.39      pazsan   1686: #else
                   1687: TYPE(c_addr, u1);
                   1688: #endif
1.17      pazsan   1689: 
1.47    ! anton    1690: emit-file      ( c wfileid -- wior )   gforth  emit_file
1.17      pazsan   1691: #ifdef HAS_FILE
1.1       anton    1692: wior = FILEIO(putc(c, (FILE *)wfileid)==EOF);
                   1693: if (wior)
                   1694:   clearerr((FILE *)wfileid);
1.17      pazsan   1695: #else
1.36      pazsan   1696: PUTC(c);
1.17      pazsan   1697: #endif
1.1       anton    1698: 
1.15      pazsan   1699: \+file
1.1       anton    1700: 
1.47    ! anton    1701: flush-file     ( wfileid -- wior )             file-ext        flush_file
1.1       anton    1702: wior = IOR(fflush((FILE *) wfileid)==EOF);
                   1703: 
1.47    ! anton    1704: file-status    ( c_addr u -- ntype wior )      file-ext        file_status
1.1       anton    1705: char *filename=tilde_cstr(c_addr, u, 1);
                   1706: if (access (filename, F_OK) != 0) {
                   1707:   ntype=0;
                   1708:   wior=IOR(1);
                   1709: }
                   1710: else if (access (filename, R_OK | W_OK) == 0) {
                   1711:   ntype=2; /* r/w */
                   1712:   wior=0;
                   1713: }
                   1714: else if (access (filename, R_OK) == 0) {
                   1715:   ntype=0; /* r/o */
                   1716:   wior=0;
                   1717: }
                   1718: else if (access (filename, W_OK) == 0) {
                   1719:   ntype=4; /* w/o */
                   1720:   wior=0;
                   1721: }
                   1722: else {
                   1723:   ntype=1; /* well, we cannot access the file, but better deliver a legal
                   1724:            access mode (r/o bin), so we get a decent error later upon open. */
                   1725:   wior=0;
                   1726: }
                   1727: 
1.15      pazsan   1728: \+
                   1729: \+floating
1.1       anton    1730: 
                   1731: comparisons(f, r1 r2, f_, r1, r2, gforth, gforth, float, gforth)
                   1732: comparisons(f0, r, f_zero_, r, 0., float, gforth, float, gforth)
                   1733: 
1.47    ! anton    1734: d>f    ( d -- r )              float   d_to_f
1.1       anton    1735: #ifdef BUGGY_LONG_LONG
                   1736: extern double ldexp(double x, int exp);
                   1737: r = ldexp((Float)d.hi,CELL_BITS) + (Float)d.lo;
                   1738: #else
                   1739: r = d;
                   1740: #endif
                   1741: 
1.47    ! anton    1742: f>d    ( r -- d )              float   f_to_d
1.1       anton    1743: #ifdef BUGGY_LONG_LONG
1.21      anton    1744: d.hi = ldexp(r,-(int)(CELL_BITS)) - (r<0);
1.1       anton    1745: d.lo = r-ldexp((Float)d.hi,CELL_BITS);
                   1746: #else
                   1747: d = r;
                   1748: #endif
                   1749: 
1.47    ! anton    1750: f!     ( r f_addr -- ) float   f_store
1.29      crook    1751: "" Store the floating-point value @i{r} to address @i{f-addr}.""
1.1       anton    1752: *f_addr = r;
                   1753: 
1.47    ! anton    1754: f@     ( f_addr -- r ) float   f_fetch
1.29      crook    1755: "" Fetch floating-point value @i{r} from address @i{f-addr}.""
1.1       anton    1756: r = *f_addr;
                   1757: 
1.47    ! anton    1758: df@    ( df_addr -- r )        float-ext       d_f_fetch
1.29      crook    1759: "" Fetch the double-precision IEEE floating-point value @i{r} from the address @i{df-addr}.""
1.1       anton    1760: #ifdef IEEE_FP
                   1761: r = *df_addr;
                   1762: #else
                   1763: !! df@
                   1764: #endif
                   1765: 
1.47    ! anton    1766: df!    ( r df_addr -- )        float-ext       d_f_store
1.29      crook    1767: "" Store the double-precision IEEE floating-point value @i{r} to the address @i{df-addr}.""
1.1       anton    1768: #ifdef IEEE_FP
                   1769: *df_addr = r;
                   1770: #else
                   1771: !! df!
                   1772: #endif
                   1773: 
1.47    ! anton    1774: sf@    ( sf_addr -- r )        float-ext       s_f_fetch
1.29      crook    1775: "" Fetch the single-precision IEEE floating-point value @i{r} from the address @i{sf-addr}.""
1.1       anton    1776: #ifdef IEEE_FP
                   1777: r = *sf_addr;
                   1778: #else
                   1779: !! sf@
                   1780: #endif
                   1781: 
1.47    ! anton    1782: sf!    ( r sf_addr -- )        float-ext       s_f_store
1.29      crook    1783: "" Store the single-precision IEEE floating-point value @i{r} to the address @i{sf-addr}.""
1.1       anton    1784: #ifdef IEEE_FP
                   1785: *sf_addr = r;
                   1786: #else
                   1787: !! sf!
                   1788: #endif
                   1789: 
1.47    ! anton    1790: f+     ( r1 r2 -- r3 ) float   f_plus
1.1       anton    1791: r3 = r1+r2;
                   1792: 
1.47    ! anton    1793: f-     ( r1 r2 -- r3 ) float   f_minus
1.1       anton    1794: r3 = r1-r2;
                   1795: 
1.47    ! anton    1796: f*     ( r1 r2 -- r3 ) float   f_star
1.1       anton    1797: r3 = r1*r2;
                   1798: 
1.47    ! anton    1799: f/     ( r1 r2 -- r3 ) float   f_slash
1.1       anton    1800: r3 = r1/r2;
                   1801: 
1.47    ! anton    1802: f**    ( r1 r2 -- r3 ) float-ext       f_star_star
1.26      crook    1803: ""@i{r3} is @i{r1} raised to the @i{r2}th power.""
1.1       anton    1804: r3 = pow(r1,r2);
                   1805: 
1.47    ! anton    1806: fnegate        ( r1 -- r2 )    float   f_negate
1.1       anton    1807: r2 = - r1;
                   1808: 
1.47    ! anton    1809: fdrop  ( r -- )                float   f_drop
1.1       anton    1810: 
1.47    ! anton    1811: fdup   ( r -- r r )    float   f_dupe
1.1       anton    1812: 
1.47    ! anton    1813: fswap  ( r1 r2 -- r2 r1 )      float   f_swap
1.1       anton    1814: 
1.47    ! anton    1815: fover  ( r1 r2 -- r1 r2 r1 )   float   f_over
1.1       anton    1816: 
1.47    ! anton    1817: frot   ( r1 r2 r3 -- r2 r3 r1 )        float   f_rote
1.1       anton    1818: 
1.47    ! anton    1819: fnip   ( r1 r2 -- r2 ) gforth  f_nip
1.1       anton    1820: 
1.47    ! anton    1821: ftuck  ( r1 r2 -- r2 r1 r2 )   gforth  f_tuck
1.1       anton    1822: 
1.47    ! anton    1823: float+ ( f_addr1 -- f_addr2 )  float   float_plus
1.29      crook    1824: "" Increment @i{f-addr1} by the number of address units corresponding to the size of
                   1825: one floating-point number, to give @i{f-addr2}.""
1.1       anton    1826: f_addr2 = f_addr1+1;
                   1827: 
1.47    ! anton    1828: floats ( n1 -- n2 )    float
1.29      crook    1829: ""@i{n2} is the number of address units corresponding to @i{n1} floating-point numbers.""
1.1       anton    1830: n2 = n1*sizeof(Float);
                   1831: 
1.47    ! anton    1832: floor  ( r1 -- r2 )    float
1.26      crook    1833: ""Round towards the next smaller integral value, i.e., round toward negative infinity.""
1.1       anton    1834: /* !! unclear wording */
                   1835: r2 = floor(r1);
                   1836: 
1.47    ! anton    1837: fround ( r1 -- r2 )    float   f_round
1.26      crook    1838: ""Round to the nearest integral value.""
1.1       anton    1839: /* !! unclear wording */
                   1840: #ifdef HAVE_RINT
                   1841: r2 = rint(r1);
                   1842: #else
                   1843: r2 = floor(r1+0.5);
                   1844: /* !! This is not quite true to the rounding rules given in the standard */
                   1845: #endif
                   1846: 
1.47    ! anton    1847: fmax   ( r1 r2 -- r3 ) float   f_max
1.1       anton    1848: if (r1<r2)
                   1849:   r3 = r2;
                   1850: else
                   1851:   r3 = r1;
                   1852: 
1.47    ! anton    1853: fmin   ( r1 r2 -- r3 ) float   f_min
1.1       anton    1854: if (r1<r2)
                   1855:   r3 = r1;
                   1856: else
                   1857:   r3 = r2;
                   1858: 
1.47    ! anton    1859: represent      ( r c_addr u -- n f1 f2 )       float
1.1       anton    1860: char *sig;
                   1861: int flag;
                   1862: int decpt;
                   1863: sig=ecvt(r, u, &decpt, &flag);
                   1864: n=(r==0 ? 1 : decpt);
                   1865: f1=FLAG(flag!=0);
1.21      anton    1866: f2=FLAG(isdigit((unsigned)(sig[0]))!=0);
1.1       anton    1867: memmove(c_addr,sig,u);
                   1868: 
1.47    ! anton    1869: >float ( c_addr u -- flag )    float   to_float
1.29      crook    1870: ""Attempt to convert the character string @i{c-addr u} to
1.27      crook    1871: internal floating-point representation. If the string
1.29      crook    1872: represents a valid floating-point number @i{r} is placed
                   1873: on the floating-point stack and @i{flag} is true. Otherwise,
                   1874: @i{flag} is false. A string of blanks is a special case
1.40      crook    1875: and represents the floating-point number 0.""
1.1       anton    1876: /* real signature: c_addr u -- r t / f */
                   1877: Float r;
                   1878: char *number=cstr(c_addr, u, 1);
                   1879: char *endconv;
1.42      pazsan   1880: int sign = 0;
                   1881: if(number[0]=='-') {
                   1882:    sign = 1;
                   1883:    number++;
                   1884:    u--;
                   1885: }
1.21      anton    1886: while(isspace((unsigned)(number[--u])) && u>0);
1.1       anton    1887: switch(number[u])
                   1888: {
                   1889:    case 'd':
                   1890:    case 'D':
                   1891:    case 'e':
                   1892:    case 'E':  break;
                   1893:    default :  u++; break;
                   1894: }
                   1895: number[u]='\0';
                   1896: r=strtod(number,&endconv);
                   1897: if((flag=FLAG(!(Cell)*endconv)))
                   1898: {
                   1899:    IF_FTOS(fp[0] = FTOS);
                   1900:    fp += -1;
1.42      pazsan   1901:    FTOS = sign ? -r : r;
1.1       anton    1902: }
                   1903: else if(*endconv=='d' || *endconv=='D')
                   1904: {
                   1905:    *endconv='E';
                   1906:    r=strtod(number,&endconv);
                   1907:    if((flag=FLAG(!(Cell)*endconv)))
                   1908:      {
                   1909:        IF_FTOS(fp[0] = FTOS);
                   1910:        fp += -1;
1.42      pazsan   1911:        FTOS = sign ? -r : r;
1.1       anton    1912:      }
                   1913: }
                   1914: 
1.47    ! anton    1915: fabs   ( r1 -- r2 )    float-ext       f_abs
1.1       anton    1916: r2 = fabs(r1);
                   1917: 
1.47    ! anton    1918: facos  ( r1 -- r2 )    float-ext       f_a_cos
1.1       anton    1919: r2 = acos(r1);
                   1920: 
1.47    ! anton    1921: fasin  ( r1 -- r2 )    float-ext       f_a_sine
1.1       anton    1922: r2 = asin(r1);
                   1923: 
1.47    ! anton    1924: fatan  ( r1 -- r2 )    float-ext       f_a_tan
1.1       anton    1925: r2 = atan(r1);
                   1926: 
1.47    ! anton    1927: fatan2 ( r1 r2 -- r3 ) float-ext       f_a_tan_two
1.26      crook    1928: ""@i{r1/r2}=tan(@i{r3}). ANS Forth does not require, but probably
1.1       anton    1929: intends this to be the inverse of @code{fsincos}. In gforth it is.""
                   1930: r3 = atan2(r1,r2);
                   1931: 
1.47    ! anton    1932: fcos   ( r1 -- r2 )    float-ext       f_cos
1.1       anton    1933: r2 = cos(r1);
                   1934: 
1.47    ! anton    1935: fexp   ( r1 -- r2 )    float-ext       f_e_x_p
1.1       anton    1936: r2 = exp(r1);
                   1937: 
1.47    ! anton    1938: fexpm1 ( r1 -- r2 )    float-ext       f_e_x_p_m_one
1.1       anton    1939: ""@i{r2}=@i{e}**@i{r1}@minus{}1""
                   1940: #ifdef HAVE_EXPM1
1.3       pazsan   1941: extern double
                   1942: #ifdef NeXT
                   1943:               const
                   1944: #endif
                   1945:                     expm1(double);
1.1       anton    1946: r2 = expm1(r1);
                   1947: #else
                   1948: r2 = exp(r1)-1.;
                   1949: #endif
                   1950: 
1.47    ! anton    1951: fln    ( r1 -- r2 )    float-ext       f_l_n
1.1       anton    1952: r2 = log(r1);
                   1953: 
1.47    ! anton    1954: flnp1  ( r1 -- r2 )    float-ext       f_l_n_p_one
1.1       anton    1955: ""@i{r2}=ln(@i{r1}+1)""
                   1956: #ifdef HAVE_LOG1P
1.3       pazsan   1957: extern double
                   1958: #ifdef NeXT
                   1959:               const
                   1960: #endif
                   1961:                     log1p(double);
1.1       anton    1962: r2 = log1p(r1);
                   1963: #else
                   1964: r2 = log(r1+1.);
                   1965: #endif
                   1966: 
1.47    ! anton    1967: flog   ( r1 -- r2 )    float-ext       f_log
1.26      crook    1968: ""The decimal logarithm.""
1.1       anton    1969: r2 = log10(r1);
                   1970: 
1.47    ! anton    1971: falog  ( r1 -- r2 )    float-ext       f_a_log
1.1       anton    1972: ""@i{r2}=10**@i{r1}""
                   1973: extern double pow10(double);
                   1974: r2 = pow10(r1);
                   1975: 
1.47    ! anton    1976: fsin   ( r1 -- r2 )    float-ext       f_sine
1.1       anton    1977: r2 = sin(r1);
                   1978: 
1.47    ! anton    1979: fsincos        ( r1 -- r2 r3 ) float-ext       f_sine_cos
1.1       anton    1980: ""@i{r2}=sin(@i{r1}), @i{r3}=cos(@i{r1})""
                   1981: r2 = sin(r1);
                   1982: r3 = cos(r1);
                   1983: 
1.47    ! anton    1984: fsqrt  ( r1 -- r2 )    float-ext       f_square_root
1.1       anton    1985: r2 = sqrt(r1);
                   1986: 
1.47    ! anton    1987: ftan   ( r1 -- r2 )    float-ext       f_tan
1.1       anton    1988: r2 = tan(r1);
                   1989: :
                   1990:  fsincos f/ ;
                   1991: 
1.47    ! anton    1992: fsinh  ( r1 -- r2 )    float-ext       f_cinch
1.1       anton    1993: r2 = sinh(r1);
                   1994: :
                   1995:  fexpm1 fdup fdup 1. d>f f+ f/ f+ f2/ ;
                   1996: 
1.47    ! anton    1997: fcosh  ( r1 -- r2 )    float-ext       f_cosh
1.1       anton    1998: r2 = cosh(r1);
                   1999: :
                   2000:  fexp fdup 1/f f+ f2/ ;
                   2001: 
1.47    ! anton    2002: ftanh  ( r1 -- r2 )    float-ext       f_tan_h
1.1       anton    2003: r2 = tanh(r1);
                   2004: :
                   2005:  f2* fexpm1 fdup 2. d>f f+ f/ ;
                   2006: 
1.47    ! anton    2007: fasinh ( r1 -- r2 )    float-ext       f_a_cinch
1.1       anton    2008: r2 = asinh(r1);
                   2009: :
                   2010:  fdup fdup f* 1. d>f f+ fsqrt f/ fatanh ;
                   2011: 
1.47    ! anton    2012: facosh ( r1 -- r2 )    float-ext       f_a_cosh
1.1       anton    2013: r2 = acosh(r1);
                   2014: :
                   2015:  fdup fdup f* 1. d>f f- fsqrt f+ fln ;
                   2016: 
1.47    ! anton    2017: fatanh ( r1 -- r2 )    float-ext       f_a_tan_h
1.1       anton    2018: r2 = atanh(r1);
                   2019: :
                   2020:  fdup f0< >r fabs 1. d>f fover f- f/  f2* flnp1 f2/
                   2021:  r> IF  fnegate  THEN ;
                   2022: 
1.47    ! anton    2023: sfloats        ( n1 -- n2 )    float-ext       s_floats
1.29      crook    2024: ""@i{n2} is the number of address units corresponding to @i{n1}
                   2025: single-precision IEEE floating-point numbers.""
1.1       anton    2026: n2 = n1*sizeof(SFloat);
                   2027: 
1.47    ! anton    2028: dfloats        ( n1 -- n2 )    float-ext       d_floats
1.29      crook    2029: ""@i{n2} is the number of address units corresponding to @i{n1}
                   2030: double-precision IEEE floating-point numbers.""
1.1       anton    2031: n2 = n1*sizeof(DFloat);
                   2032: 
1.47    ! anton    2033: sfaligned      ( c_addr -- sf_addr )   float-ext       s_f_aligned
1.29      crook    2034: "" @i{sf-addr} is the first single-float-aligned address greater
                   2035: than or equal to @i{c-addr}.""
1.1       anton    2036: sf_addr = (SFloat *)((((Cell)c_addr)+(sizeof(SFloat)-1))&(-sizeof(SFloat)));
                   2037: :
                   2038:  [ 1 sfloats 1- ] Literal + [ -1 sfloats ] Literal and ;
                   2039: 
1.47    ! anton    2040: dfaligned      ( c_addr -- df_addr )   float-ext       d_f_aligned
1.29      crook    2041: "" @i{df-addr} is the first double-float-aligned address greater
                   2042: than or equal to @i{c-addr}.""
1.1       anton    2043: df_addr = (DFloat *)((((Cell)c_addr)+(sizeof(DFloat)-1))&(-sizeof(DFloat)));
                   2044: :
                   2045:  [ 1 dfloats 1- ] Literal + [ -1 dfloats ] Literal and ;
                   2046: 
                   2047: \ The following words access machine/OS/installation-dependent
                   2048: \   Gforth internals
                   2049: \ !! how about environmental queries DIRECT-THREADED,
                   2050: \   INDIRECT-THREADED, TOS-CACHED, FTOS-CACHED, CODEFIELD-DOES */
                   2051: 
                   2052: \ local variable implementation primitives
1.15      pazsan   2053: \+
                   2054: \+glocals
1.1       anton    2055: 
1.47    ! anton    2056: @local#        ( -- w )        gforth  fetch_local_number
1.1       anton    2057: w = *(Cell *)(lp+(Cell)NEXT_INST);
                   2058: INC_IP(1);
                   2059: 
1.47    ! anton    2060: @local0        ( -- w )        new     fetch_local_zero
1.1       anton    2061: w = *(Cell *)(lp+0*sizeof(Cell));
                   2062: 
1.47    ! anton    2063: @local1        ( -- w )        new     fetch_local_four
1.1       anton    2064: w = *(Cell *)(lp+1*sizeof(Cell));
                   2065: 
1.47    ! anton    2066: @local2        ( -- w )        new     fetch_local_eight
1.1       anton    2067: w = *(Cell *)(lp+2*sizeof(Cell));
                   2068: 
1.47    ! anton    2069: @local3        ( -- w )        new     fetch_local_twelve
1.1       anton    2070: w = *(Cell *)(lp+3*sizeof(Cell));
                   2071: 
1.15      pazsan   2072: \+floating
1.1       anton    2073: 
1.47    ! anton    2074: f@local#       ( -- r )        gforth  f_fetch_local_number
1.1       anton    2075: r = *(Float *)(lp+(Cell)NEXT_INST);
                   2076: INC_IP(1);
                   2077: 
1.47    ! anton    2078: f@local0       ( -- r )        new     f_fetch_local_zero
1.1       anton    2079: r = *(Float *)(lp+0*sizeof(Float));
                   2080: 
1.47    ! anton    2081: f@local1       ( -- r )        new     f_fetch_local_eight
1.1       anton    2082: r = *(Float *)(lp+1*sizeof(Float));
                   2083: 
1.15      pazsan   2084: \+
1.1       anton    2085: 
1.47    ! anton    2086: laddr# ( -- c_addr )   gforth  laddr_number
1.1       anton    2087: /* this can also be used to implement lp@ */
                   2088: c_addr = (Char *)(lp+(Cell)NEXT_INST);
                   2089: INC_IP(1);
                   2090: 
1.47    ! anton    2091: lp+!#  ( -- )  gforth  lp_plus_store_number
1.1       anton    2092: ""used with negative immediate values it allocates memory on the
                   2093: local stack, a positive immediate argument drops memory from the local
                   2094: stack""
                   2095: lp += (Cell)NEXT_INST;
                   2096: INC_IP(1);
                   2097: 
1.47    ! anton    2098: lp-    ( -- )  new     minus_four_lp_plus_store
1.1       anton    2099: lp += -sizeof(Cell);
                   2100: 
1.47    ! anton    2101: lp+    ( -- )  new     eight_lp_plus_store
1.1       anton    2102: lp += sizeof(Float);
                   2103: 
1.47    ! anton    2104: lp+2   ( -- )  new     sixteen_lp_plus_store
1.1       anton    2105: lp += 2*sizeof(Float);
                   2106: 
1.47    ! anton    2107: lp!    ( c_addr -- )   gforth  lp_store
1.1       anton    2108: lp = (Address)c_addr;
                   2109: 
1.47    ! anton    2110: >l     ( w -- )        gforth  to_l
1.1       anton    2111: lp -= sizeof(Cell);
                   2112: *(Cell *)lp = w;
                   2113: 
1.15      pazsan   2114: \+floating
1.1       anton    2115: 
1.47    ! anton    2116: f>l    ( r -- )        gforth  f_to_l
1.1       anton    2117: lp -= sizeof(Float);
                   2118: *(Float *)lp = r;
                   2119: 
1.47    ! anton    2120: fpick  ( u -- r )              gforth
1.11      anton    2121: r = fp[u+1]; /* +1, because update of fp happens before this fragment */
                   2122: :
                   2123:  floats fp@ + f@ ;
                   2124: 
1.15      pazsan   2125: \+
                   2126: \+
1.1       anton    2127: 
1.15      pazsan   2128: \+OS
1.1       anton    2129: 
                   2130: define(`uploop',
                   2131:        `pushdef(`$1', `$2')_uploop(`$1', `$2', `$3', `$4', `$5')`'popdef(`$1')')
                   2132: define(`_uploop',
                   2133:        `ifelse($1, `$3', `$5',
                   2134:               `$4`'define(`$1', incr($1))_uploop(`$1', `$2', `$3', `$4', `$5')')')
                   2135: \ argflist(argnum): Forth argument list
                   2136: define(argflist,
                   2137:        `ifelse($1, 0, `',
                   2138:                `uploop(`_i', 1, $1, `format(`u%d ', _i)', `format(`u%d ', _i)')')')
                   2139: \ argdlist(argnum): declare C's arguments
                   2140: define(argdlist,
                   2141:        `ifelse($1, 0, `',
                   2142:                `uploop(`_i', 1, $1, `Cell, ', `Cell')')')
                   2143: \ argclist(argnum): pass C's arguments
                   2144: define(argclist,
                   2145:        `ifelse($1, 0, `',
                   2146:                `uploop(`_i', 1, $1, `format(`u%d, ', _i)', `format(`u%d', _i)')')')
                   2147: \ icall(argnum)
                   2148: define(icall,
1.47    ! anton    2149: `icall$1       ( argflist($1)u -- uret )       gforth
1.9       pazsan   2150: uret = (SYSCALL(Cell(*)(argdlist($1)))u)(argclist($1));
1.1       anton    2151: 
                   2152: ')
                   2153: define(fcall,
1.47    ! anton    2154: `fcall$1       ( argflist($1)u -- rret )       gforth
1.9       pazsan   2155: rret = (SYSCALL(Float(*)(argdlist($1)))u)(argclist($1));
1.1       anton    2156: 
                   2157: ')
                   2158: 
1.46      pazsan   2159: \ close ' to keep fontify happy
1.1       anton    2160: 
1.47    ! anton    2161: open-lib       ( c_addr1 u1 -- u2 )    gforth  open_lib
1.1       anton    2162: #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN)
1.8       anton    2163: #ifndef RTLD_GLOBAL
                   2164: #define RTLD_GLOBAL 0
                   2165: #endif
1.7       pazsan   2166: u2=(UCell) dlopen(cstr(c_addr1, u1, 1), RTLD_GLOBAL | RTLD_LAZY);
1.1       anton    2167: #else
1.18      pazsan   2168: #  ifdef _WIN32
1.1       anton    2169: u2 = (Cell) GetModuleHandle(cstr(c_addr1, u1, 1));
                   2170: #  else
                   2171: #warning Define open-lib!
                   2172: u2 = 0;
                   2173: #  endif
                   2174: #endif
                   2175: 
1.47    ! anton    2176: lib-sym        ( c_addr1 u1 u2 -- u3 ) gforth  lib_sym
1.1       anton    2177: #if defined(HAVE_LIBDL) || defined(HAVE_DLOPEN)
                   2178: u3 = (UCell) dlsym((void*)u2,cstr(c_addr1, u1, 1));
                   2179: #else
1.18      pazsan   2180: #  ifdef _WIN32
1.1       anton    2181: u3 = (Cell) GetProcAddress((HMODULE)u2, cstr(c_addr1, u1, 1));
                   2182: #  else
                   2183: #warning Define lib-sym!
                   2184: u3 = 0;
                   2185: #  endif
                   2186: #endif
                   2187: 
                   2188: uploop(i, 0, 7, `icall(i)')
                   2189: icall(20)
                   2190: uploop(i, 0, 7, `fcall(i)')
                   2191: fcall(20)
                   2192: 
1.15      pazsan   2193: \+
1.1       anton    2194: 
1.47    ! anton    2195: up!    ( a_addr -- )   gforth  up_store
1.1       anton    2196: UP=up=(char *)a_addr;
                   2197: :
                   2198:  up ! ;
                   2199: Variable UP
1.34      jwilke   2200: 
1.47    ! anton    2201: wcall  ( u -- )        gforth
1.34      jwilke   2202: IF_FTOS(fp[0]=FTOS);
                   2203: FP=fp;
                   2204: sp=(SYSCALL(Cell(*)(Cell *, void *))u)(sp, &FP);
                   2205: fp=FP;
                   2206: IF_TOS(TOS=sp[0];)
                   2207: IF_FTOS(FTOS=fp[0]);
1.46      pazsan   2208: 
                   2209: \+file
                   2210: 
1.47    ! anton    2211: open-dir       ( c_addr u -- wdirid wior )     gforth  open_dir
1.46      pazsan   2212: wdirid = (Cell)opendir(tilde_cstr(c_addr, u, 1));
                   2213: wior =  IOR(wdirid == 0);
                   2214: 
1.47    ! anton    2215: read-dir       ( c_addr u1 wdirid -- u2 flag wior )    gforth  read_dir
1.46      pazsan   2216: struct dirent * dent;
                   2217: dent = readdir((DIR *)wdirid);
                   2218: wior = 0;
                   2219: flag = -1;
                   2220: if(dent == NULL) {
                   2221:   u2 = 0;
                   2222:   flag = 0;
                   2223: } else {
                   2224:   u2 = strlen(dent->d_name);
                   2225:   if(u2 > u1)
                   2226:     u2 = u1;
                   2227:   memmove(c_addr, dent->d_name, u2);
                   2228: }
                   2229: 
1.47    ! anton    2230: close-dir      ( wdirid -- wior )      gforth  close_dir
1.46      pazsan   2231: wior = IOR(closedir((DIR *)wdirid));
                   2232: 
1.47    ! anton    2233: filename-match ( c_addr1 u1 c_addr2 u2 -- flag )       gforth  match_file
1.46      pazsan   2234: char * string = cstr(c_addr1, u1, 1);
                   2235: char * pattern = cstr(c_addr2, u2, 0);
                   2236: flag = FLAG(!fnmatch(pattern, string, 0));
                   2237: 
                   2238: \+
1.34      jwilke   2239: 
1.47    ! anton    2240: newline        ( -- c_addr u ) gforth
1.45      anton    2241: ""String containing the newline sequence of the host OS""
                   2242: char newline[] = {
                   2243: #ifdef unix
                   2244: '\n'
                   2245: #else
                   2246: '\r','\n'
                   2247: #endif
                   2248: };
                   2249: c_addr=newline;
                   2250: u=sizeof(newline);

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