\ quote: S\" and .\" words \ Copyright (C) 2002 Free Software Foundation, Inc. \ This file is part of Gforth. \ Gforth is free software; you can redistribute it and/or \ modify it under the terms of the GNU General Public License \ as published by the Free Software Foundation; either version 2 \ of the License, or (at your option) any later version. \ This program is distributed in the hope that it will be useful, \ but WITHOUT ANY WARRANTY; without even the implied warranty of \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the \ GNU General Public License for more details. \ You should have received a copy of the GNU General Public License \ along with this program; if not, write to the Free Software \ Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA. : char/ ; immediate : parse-num-x ( c-addr1 base -- c-addr2 c ) base ! 0. rot source chars + over - char/ >number drop rot rot drop ; : parse-num ( c-addr1 base -- c-addr2 c ) base @ >r ['] parse-num-x catch r> base ! throw ; create \-escape-table 7 c, 8 c, char c c, char d c, 27 c, 12 c, char g c, char h c, char i c, char j c, char k c, char l c, char m c, 10 c, char o c, char p c, char q c, 13 c, char s c, 9 c, char u c, 11 c, : \-escape ( c-addr1 -- c-addr2 c ) \ c-addr1 points at a char right after a '\', c-addr2 points right \ after the whole sequence, c is the translated char dup c@ dup [char] x = if drop char+ 16 parse-num exit endif dup [char] 0 [char] 8 within if drop 8 parse-num exit endif dup [char] n = if \ \-escapes were designed to translate to one character, so \ this is quite ugly: copy all but the last char right away drop newline 1- 2dup here swap chars dup allot move chars + c@ else dup [char] a [char] w within if [char] a - chars \-escape-table + c@ endif endif 1 chars under+ ; : \"-parse ( "string"<"> -- c-addr u ) \G parses string, translating @code{\}-escapes to characters (as in \G C). The resulting string resides at @code{here char+}. The \G supported @code{\-escapes} are: @code{\a} BEL (alert), @code{\b} \G BS, @code{\e} ESC (not in C99), @code{\f} FF, @code{\n} newline, \G @code{\r} CR, @code{\t} HT, @code{\v} VT, @code{\"} ", \G @code{\}[0-7]+ octal numerical character value, @code{\x}[0-9a-f]+ \G hex numerical character value; a @code{\} before any other \G character represents that character (only ', \, ? in C99). here >r 0 c, >in @ chars source chars over + >r + begin ( parse-area R: here parse-end ) dup r@ < while dup c@ [char] " <> while dup c@ dup [char] \ = if ( parse-area c R: here parse-end ) drop char+ dup r@ = abort" unfinished \-escape" \-escape c, else c, char+ endif repeat then char+ source >r - r> min char/ >in ! r> drop here r> - dup negate allot here swap char/ 1 /string ; :noname \"-parse save-mem ; :noname postpone (s") \"-parse dup c, 1+ chars allot drop ; interpret/compile: s\" ( compilation 'ccc"' -- ; run-time -- c-addr u ) \ gforth s-backslash-quote \G Like @code{S"}, but translates C-like \-escape-sequences into \G single characters. See @code{\"-parse} for details. :noname \"-parse type ; :noname postpone (.") \"-parse dup c, 1+ chars allot drop ; interpret/compile: .\" ( compilation 'ccc"' -- ; run-time -- ) \ gforth dot-backslash-quote 0 [if] \ test s" 123" drop 10 parse-num-x 123 <> throw drop .s s" 123a" drop 10 parse-num 123 <> throw drop .s s" x1fg" drop \-escape 31 <> throw drop .s s" 00129" drop \-escape 10 <> throw drop .s s" a" drop \-escape 7 <> throw drop .s \"-parse " s" " str= 0= throw .s \"-parse \a\b\c\e\f\n\r\t\v\100\x40xabcde" dump s\" \a\bcd\e\fghijklm\12opq\rs\tu\v" \-escape-table over str= 0= throw s\" \w\0101\x041\"\\" name wAA"\ str= 0= throw s\" s\\\" \\" ' evaluate catch 0= throw [endif]