Annotation of gforth/quotes.fs, revision 1.1

1.1     ! anton       1: \ quote: S\" and .\" words
        !             2: 
        !             3: \ Copyright (C) 2002 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: : char/ ; immediate
        !            22: 
        !            23: : parse-num-x  ( c-addr1 base -- c-addr2 c )
        !            24:     base !
        !            25:     0. rot source chars + over - char/ >number
        !            26:     drop rot rot drop ;
        !            27: 
        !            28: : parse-num ( c-addr1 base -- c-addr2 c )
        !            29:     base @ >r
        !            30:     ['] parse-num-x catch
        !            31:     r> base ! throw ;
        !            32: 
        !            33: create \-escape-table
        !            34:     7 c,        8 c,  char c c,  char d c,      27 c,      12 c,  char g c,
        !            35: char h c,  char i c,  char j c,  char k c,  char l c,  char m c,      10 c,
        !            36: char o c,  char p c,  char q c,      13 c,  char s c,       8 c,  char u c,
        !            37:     11 c,
        !            38: 
        !            39: : \-escape ( c-addr1 -- c-addr2 c )
        !            40:     \ c-addr1 points at a char right after a '\', c-addr2 points right
        !            41:     \ after the whole sequence, c is the translated char
        !            42:     dup c@ dup [char] x = if
        !            43:        drop char+ 16 parse-num exit
        !            44:     endif
        !            45:     dup [char] 0 [char] 8 within if
        !            46:        drop 8 parse-num exit
        !            47:     endif
        !            48:     dup [char] a [char] w within if
        !            49:        [char] a - chars \-escape-table + c@
        !            50:     endif
        !            51:     1 chars under+ ;
        !            52: 
        !            53: : \"-parse ( "string"<"> -- c-addr u )
        !            54: \G parses string, translating @code{\}-escapes to characters (as in
        !            55: \G C).  The resulting string resides at @code{here char+}.  The
        !            56: \G supported @code{\-escapes} are: @code{\a} BEL (alert), @code{\b}
        !            57: \G BS, @code{\e} ESC (not in C99), @code{\f} FF, @code{\n} LF (or
        !            58: \G newline?), @code{\r} CR, @code{\t} HT, @code{\v} VT, @code{\"} ",
        !            59: \G @code{\}[0-7]+ octal numerical character value, @code{\x}[0-9a-f]+
        !            60: \G hex numerical character value; a @code{\} before any other
        !            61: \G character represents that character (only ', \, ? in C99).
        !            62:     here >r 0 c,
        !            63:     >in @ chars source chars over + >r + begin ( parse-area R: here parse-end )
        !            64:        dup r@ < while
        !            65:            dup c@ [char] " <> while
        !            66:                dup c@ dup [char] \ = if ( parse-area c R: here parse-end )
        !            67:                    drop char+ dup r@ = abort" unfinished \-escape"
        !            68:                    \-escape c,
        !            69:                else
        !            70:                    c, char+
        !            71:                endif
        !            72:        repeat then
        !            73:     char+ source >r - r> min char/ >in !
        !            74:     r> drop
        !            75:     here r> - dup negate allot
        !            76:     here swap char/ 1 /string ;
        !            77: 
        !            78: :noname \"-parse save-mem ;
        !            79: :noname postpone (s") \"-parse dup c, 1+ chars allot drop ;
        !            80: interpret/compile: s\" ( compilation 'ccc"' -- ; run-time -- c-addr u )        \ gforth        s-backslash-quote
        !            81: \G Like @code{S"}, but translates C-like \-escape-sequences into
        !            82: \G single characters.  See @code{\"-parse} for details.
        !            83: 
        !            84: :noname \"-parse type ;
        !            85: :noname postpone (.") \"-parse dup c, 1+ chars allot drop ;
        !            86: interpret/compile: .\" ( compilation 'ccc"' -- ; run-time -- ) \ gforth        dot-backslash-quote
        !            87: 
        !            88: 0 [if] \ test
        !            89:     s" 123" drop 10 parse-num-x 123 <> throw drop .s
        !            90:     s" 123a" drop 10 parse-num   123 <> throw drop .s
        !            91:     s" x1fg" drop \-escape 31 <> throw drop .s
        !            92:     s" 00129" drop \-escape 10 <> throw drop .s
        !            93:     s" a" drop \-escape 7 <> throw drop .s
        !            94:     \"-parse " s" " compare 0<> throw .s
        !            95:     \"-parse \a\b\c\e\f\n\r\t\v\100\x40xabcde" dump
        !            96:     s\" \a\bcd\e\fghijklm\nopq\rs\tu\v" \-escape-table over compare 0<> throw
        !            97:     s\" \0101\x041\"\\" name AA"\ compare 0<> throw
        !            98:     s\" s\\\" \\" ' evaluate catch 0= throw
        !            99: [endif]

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