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| 1 : | anton | 1.1 | \ 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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