File:  [gforth] / gforth / kernel / quotes.fs
Revision 1.5: download - view: text, annotated - select for diffs
Sat Jun 16 22:53:38 2001 UTC (21 years ago) by pazsan
Branches: MAIN
CVS tags: HEAD
Made some Gforth-EC targets work again
Started grouping (no renumbering yet, groups are just dummies)

    1: \ quote: S" and ." words
    2: 
    3: \ Copyright (C) 1996,1998,1999 Free Software Foundation, Inc.
    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., 59 Temple Place, Suite 330, Boston, MA 02111, USA.
   20: 
   21: \ this file comes last, because these words override cross' words.
   22: 
   23: require ./vars.fs
   24: 
   25: \ create s"-buffer /line chars allot
   26: has? compiler 0= 
   27: [IF] : s" [ELSE] :noname [THEN]
   28: 	[char] " parse
   29: [ has? OS [IF] ]
   30:     save-mem
   31: [ [THEN] ]
   32: ;
   33: \    	/line min >r s"-buffer r@ cmove
   34: \    	s"-buffer r> ;
   35: has? compiler [IF]
   36: :noname [char] " parse postpone SLiteral ;
   37: interpret/compile: S" ( compilation 'ccc"' -- ; run-time -- c-addr u )	\ core,file	s-quote
   38:   \G Compilation: Parse a string @i{ccc} delimited by a @code{"}
   39:   \G (double quote). At run-time, return the length, @i{u}, and the
   40:   \G start address, @i{c-addr} of the string. Interpretation: parse
   41:   \G the string as before, and return @i{c-addr}, @i{u}. Gforth
   42:   \G @code{allocate}s the string. The resulting memory leak is usually
   43:   \G not a problem; the exception is if you create strings containing
   44:   \G @code{S"} and @code{evaluate} them; then the leak is not bounded
   45:   \G by the size of the interpreted files and you may want to
   46:   \G @code{free} the strings.  ANS Forth only guarantees one buffer of
   47:   \G 80 characters, so in standard programs you should assume that the
   48:   \G string lives only until the next @code{s"}.
   49: [THEN]
   50: 
   51: :noname    [char] " parse type ;
   52: :noname    postpone (.") ,"  align ;
   53: interpret/compile: ." ( compilation 'ccc"' -- ; run-time -- )  \ core	dot-quote
   54:   \G Compilation: Parse a string @i{ccc} delimited by a " (double
   55:   \G quote). At run-time, display the string. Interpretation semantics
   56:   \G for this word are undefined in ANS Forth. Gforth's interpretation
   57:   \G semantics are to display the string. This is the simplest way to
   58:   \G display a string from within a definition; see examples below.
   59: 

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