--- gforth/quotes.fs 2002/09/14 08:20:19 1.5 +++ gforth/quotes.fs 2007/12/31 17:34:58 1.13 @@ -1,6 +1,6 @@ \ quote: S\" and .\" words -\ Copyright (C) 2002 Free Software Foundation, Inc. +\ Copyright (C) 2002,2003,2005,2007 Free Software Foundation, Inc. \ This file is part of Gforth. @@ -20,59 +20,54 @@ : char/ ; immediate -: parse-num-x ( c-addr1 base -- c-addr2 c ) - base ! - 0. rot source chars + over - char/ >number +: parse-num-x ( c-addr1 umax -- c-addr2 c ) + >r 0. rot source chars + over - char/ r> umin >number drop rot rot drop ; -: parse-num ( c-addr1 base -- c-addr2 c ) - base @ >r - ['] parse-num-x catch - r> base ! throw ; +: parse-num ( c-addr1 umax base -- c-addr2 c ) + ['] parse-num-x swap base-execute ; 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, + 7 c, #bs c, 'c c, 'd c, #esc c, #ff c, 'g c, +'h c, 'i c, 'j c, 'k c, #lf c, #lf c, #lf c, +'o c, 'p c, '" c, #cr c, 's c, #tab c, 'u c, +11 c, 'w c, 'x c, 'y c, 0 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 + dup 'x = if + drop char+ 2 16 parse-num exit endif - dup [char] 0 [char] 8 within if - drop 8 parse-num exit + dup '0 '8 within if + drop 3 8 parse-num exit endif - dup [char] n = if + dup '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@ + dup 'm = if \ crlf; ugly, because it's two characters + #cr c, \ first half, the rest follows below + endif + dup 'a '{ within if + 'a - chars \-escape-table + c@ endif endif 1 chars under+ ; -: \"-parse ( "string"<"> -- c-addr u ) +: \"-parse ( "string"<"> -- c-addr u ) \ gforth-internal backslash-quote-parse \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, +\G C). The resulting string resides at @code{here}. See @code{S\"} +\G for the supported @code{\-escapes}. + here >r >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 ) + dup c@ '" <> while + dup c@ dup '\ = if ( parse-area c R: here parse-end ) drop char+ dup r@ = abort" unfinished \-escape" \-escape c, else @@ -82,17 +77,24 @@ char o c, char p c, char q c, 13 char+ source >r - r> min char/ >in ! r> drop here r> - dup negate allot - here swap char/ 1 /string ; + here swap char/ ; :noname \"-parse save-mem ; -:noname postpone (s") \"-parse dup c, 1+ chars allot drop ; +:noname \"-parse save-mem 2dup postpone sliteral drop free throw ; 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. +\G Like @code{S"}, but translates C-like \-escape-sequences, as +\G follows: @code{\a} BEL (alert), @code{\b} BS, @code{\e} ESC (not in +\G C99), @code{\f} FF, @code{\n} newline, @code{\r} CR, @code{\t} HT, +\G @code{\v} VT, @code{\"} ", @code{\\} \, @code{\}[0-7]@{1,3@} octal +\G numerical character value (non-standard), @code{\x}[0-9a-f]@{0,2@} +\G hex numerical character value (standard only with two digits); a +\G @code{\} before any other character is reserved. :noname \"-parse type ; -:noname postpone (.") \"-parse dup c, 1+ chars allot drop ; +:noname postpone s\" postpone type ; interpret/compile: .\" ( compilation 'ccc"' -- ; run-time -- ) \ gforth dot-backslash-quote +\G Like @code{."}, but translates C-like \-escape-sequences (see +\G @code{S\"}). 0 [if] \ test s" 123" drop 10 parse-num-x 123 <> throw drop .s @@ -102,7 +104,7 @@ interpret/compile: .\" ( compilation 'cc 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\" \a\bcd\e\fghijklm\12op\"\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]