[gforth] / gforth / prim  

gforth: gforth/prim

Diff for /gforth/prim between version 1.21 and 1.22

version 1.21, Mon Dec 21 22:52:30 1998 UTC version 1.22, Wed Feb 3 00:10:21 1999 UTC
Line 115 
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  r> dup @ swap cell+ >r ;   r> dup @ swap cell+ >r ;
   
 execute         xt --           core  execute         xt --           core
   ""Perform the semantics represented by the execution token, xt.""
 ip=IP;  ip=IP;
 IF_TOS(TOS = sp[0]);  IF_TOS(TOS = sp[0]);
 EXEC(xt);  EXEC(xt);
   
 perform         a_addr --       gforth  perform         a_addr --       gforth
 ""equivalent to @code{@ execute}""  ""Equivalent to @code{@ execute}.""
 /* and pfe */  /* and pfe */
 ip=IP;  ip=IP;
 IF_TOS(TOS = sp[0]);  IF_TOS(TOS = sp[0]);
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 \ digit is high-level: 0/0%  \ digit is high-level: 0/0%
   
 move    c_from c_to ucount --           core  move    c_from c_to ucount --           core
   "" If ucount>0, copy the contents of ucount address units
   at c-from to c-to. @code{move} chooses its copy direction
   to avoid problems when c-from, c-to overlap.""
 memmove(c_to,c_from,ucount);  memmove(c_to,c_from,ucount);
 /* make an Ifdef for bsd and others? */  /* make an Ifdef for bsd and others? */
 :  :
  >r 2dup u< IF r> cmove> ELSE r> cmove THEN ;   >r 2dup u< IF r> cmove> ELSE r> cmove THEN ;
   
 cmove   c_from c_to u --        string  cmove   c_from c_to u --        string
   "" If u>0, copy the contents of ucount characters from
   data space at c-from to c-to. The copy proceeds @code{char}-by-@code{char}
   from low address to high address.""
 while (u-- > 0)  while (u-- > 0)
   *c_to++ = *c_from++;    *c_to++ = *c_from++;
 :  :
  bounds ?DO  dup c@ I c! 1+  LOOP  drop ;   bounds ?DO  dup c@ I c! 1+  LOOP  drop ;
   
 cmove>  c_from c_to u --        string  c_move_up  cmove>  c_from c_to u --        string  c_move_up
   "" If u>0, copy the contents of ucount characters from
   data space at c-from to c-to. The copy proceeds @code{char}-by-@code{char}
   from high address to low address.""
 while (u-- > 0)  while (u-- > 0)
   c_to[u] = c_from[u];    c_to[u] = c_from[u];
 :  :
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  DO  1- dup c@ I c!  -1 +LOOP  drop ;   DO  1- dup c@ I c!  -1 +LOOP  drop ;
   
 fill    c_addr u c --   core  fill    c_addr u c --   core
   "" If u>0, store character c in each of u consecutive
   @code{char} addresses in memory, starting at address c-addr.""
 memset(c_addr,c,u);  memset(c_addr,c,u);
 :  :
  -rot bounds   -rot bounds
  ?DO  dup I c!  LOOP  drop ;   ?DO  dup I c!  LOOP  drop ;
   
 compare         c_addr1 u1 c_addr2 u2 -- n      string  compare         c_addr1 u1 c_addr2 u2 -- n      string
 ""Compare the strings lexicographically. If they are equal, n is 0; if  ""Compare two strings lexicographically. If they are equal, n is 0; if
 the first string is smaller, n is -1; if the first string is larger, n  the first string is smaller, n is -1; if the first string is larger, n
 is 1. Currently this is based on the machine's character  is 1. Currently this is based on the machine's character
 comparison. In the future, this may change to considering the current  comparison. In the future, this may change to considering the current
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 \+  \+
   
 ;s      --              gforth  semis  ;s      --              gforth  semis
   ""The primitive compiled by @code{EXIT}.""
 ip = (Xt *)(*rp++);  ip = (Xt *)(*rp++);
 NEXT_P0;  NEXT_P0;
   
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  ;   ;
   
 count   c_addr1 -- c_addr2 u    core  count   c_addr1 -- c_addr2 u    core
   "" If c-add1 is the address of a counted string return the length of
   the string, u, and the address of its first character, c-addr2.""
 u = *c_addr1;  u = *c_addr1;
 c_addr2 = c_addr1+1;  c_addr2 = c_addr1+1;
 :  :
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 >does-code      xt -- a_addr            gforth  to_does_code  >does-code      xt -- a_addr            gforth  to_does_code
 ""If xt ist the execution token of a defining-word-defined word,  ""If xt ist the execution token of a defining-word-defined word,
 a_addr is the start of the Forth code after the DOES>;  a_addr is the start of the Forth code after the @code{DOES>};
 Otherwise a_addr is 0.""  Otherwise a_addr is 0.""
 a_addr = (Cell *)DOES_CODE(xt);  a_addr = (Cell *)DOES_CODE(xt);
 :  :
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 close-file      wfileid -- wior         file    close_file  close-file      wfileid -- wior         file    close_file
 wior = IOR(fclose((FILE *)wfileid)==EOF);  wior = IOR(fclose((FILE *)wfileid)==EOF);
   
 open-file       c_addr u ntype -- w2 wior       file    open_file  open-file       c_addr u ntype -- wfileid wior  file    open_file
 w2 = (Cell)fopen(tilde_cstr(c_addr, u, 1), fileattr[ntype]);  wfileid = (Cell)fopen(tilde_cstr(c_addr, u, 1), fileattr[ntype]);
 #if defined(GO32) && defined(MSDOS)  #if defined(GO32) && defined(MSDOS)
 if(w2 && !(ntype & 1))  if(wfileid && !(ntype & 1))
   setbuf((FILE*)w2, NULL);    setbuf((FILE*)wfileid, NULL);
 #endif  #endif
 wior =  IOR(w2 == 0);  wior =  IOR(wfileid == 0);
   
 create-file     c_addr u ntype -- w2 wior       file    create_file  create-file     c_addr u ntype -- wfileid wior  file    create_file
 Cell    fd;  Cell    fd;
 fd = open(tilde_cstr(c_addr, u, 1), O_CREAT|O_TRUNC|ufileattr[ntype], 0666);  fd = open(tilde_cstr(c_addr, u, 1), O_CREAT|O_TRUNC|ufileattr[ntype], 0666);
 if (fd != -1) {  if (fd != -1) {
   w2 = (Cell)fdopen(fd, fileattr[ntype]);    wfileid = (Cell)fdopen(fd, fileattr[ntype]);
 #if defined(GO32) && defined(MSDOS)  #if defined(GO32) && defined(MSDOS)
   if(w2 && !(ntype & 1))    if(wfileid && !(ntype & 1))
     setbuf((FILE*)w2, NULL);      setbuf((FILE*)wfileid, NULL);
 #endif  #endif
   wior = IOR(w2 == 0);    wior = IOR(wfileid == 0);
 } else {  } else {
   w2 = 0;    wfileid = 0;
   wior = IOR(1);    wior = IOR(1);
 }  }
   

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