1 \ @(#) numberio.fth 98/01/26 1.2
7 \ Copyright 1994 3DO, Phil Burk, Larry Polansky, David Rosenboom
9 \ The pForth software code is dedicated to the public domain,
10 \ and any third party may reproduce, distribute and modify
11 \ the pForth software code or any derivative works thereof
12 \ without any compensation or license. The pForth software
13 \ code is provided on an "as is" basis without any warranty
14 \ of any kind, including, without limitation, the implied
15 \ warranties of merchantability and fitness for a particular
16 \ purpose and their equivalents under the laws of any jurisdiction.
18 anew task-numberio.fth
21 \ ------------------------ INPUT -------------------------------
22 \ Convert a single character to a number in the given base.
23 : DIGIT ( char base -- n true | char false )
25 \ convert lower to upper
32 IF ascii A - ascii 9 + 1+
36 ( between 9 and A is bad )
37 drop 0 ( trigger error below )
50 : >NUMBER ( ud1 c-addr1 u1 -- ud2 c-addr2 u2 , convert till bad char , CORE )
53 r@ 0> \ any characters left?
56 digit ( ud1 c-addr , n true | char false )
65 WHILE ( -- ud1 c-addr n )
66 swap >r ( -- ud1lo ud1hi n )
67 swap base @ ( -- ud1lo n ud1hi base )
68 um* drop ( -- ud1lo n ud1hi*baselo )
69 rot base @ ( -- n ud1hi*baselo ud1lo base )
70 um* ( -- n ud1hi*baselo ud1lo*basello ud1lo*baselhi )
72 r> 1+ \ increment char*
73 r> 1- >r \ decrement count
79 : CONVERT ( ud1 c-addr1 -- ud2 c-addr2 , convert till bad char , CORE EXT )
83 0 constant NUM_TYPE_BAD
84 1 constant NUM_TYPE_SINGLE
85 2 constant NUM_TYPE_DOUBLE
87 \ Like >number, but temporarily switch BASE.
88 : (>number-with-base) ( ud c-addr u base -- ud' c-addr' u' )
89 base @ >r base ! >number r> base !
92 \ This is similar to the F83 NUMBER? except that it returns a number type
93 \ and then either a single or double precision number.
94 : ((NUMBER?)) ( c-addr u -- 0 | n 1 | d 2 , convert string to number )
95 dup 0= IF 2drop NUM_TYPE_BAD exit THEN \ any chars?
97 base @ -rot ( base c-addr u )
99 \ Recognize prefixes and change base if needed
100 over c@ >r ( base c-addr u ) ( r: char )
101 r@ [char] # = if rot drop 10 -rot 1 /string then
102 r@ [char] $ = if rot drop 16 -rot 1 /string then
103 r@ [char] % = if rot drop 2 -rot 1 /string then
107 over 2 chars + c@ [char] ' = if
109 char+ c@ NUM_TYPE_SINGLE exit
115 \ check for '-' at beginning, skip if present
116 over c@ ascii - = \ is it a '-'
118 IF 1 /string ( -- base c-addr+1 cnt-1 , skip past minus sign )
121 ( base c-addr cnt ) ( r: minus-flag )
123 (>number-with-base) dup 0= \ convert as much as we can
125 2drop \ drop addr cnt
126 drop \ drop hi part of num
127 r@ \ check flag to see if '-' sign used
131 ELSE ( -- d addr cnt )
132 1 = swap \ if final character is '.' then double
135 r@ \ check flag to see if '-' sign used
147 : (NUMBER?) ( $addr -- 0 | n 1 | d 2 , convert string to number )
151 ' (number?) is number?
153 \ 0sp c" xyz" (number?) .s
154 \ 0sp c" 234" (number?) .s
155 \ 0sp c" -234" (number?) .s
156 \ 0sp c" 234." (number?) .s
157 \ 0sp c" -234." (number?) .s
158 \ 0sp c" 1234567855554444." (number?) .s
161 \ ------------------------ OUTPUT ------------------------------
162 \ Number output based on F83
163 variable HLD \ points to last character added
165 : hold ( char -- , add character to text representation)
169 : <# ( -- , setup conversion )
172 : #> ( d -- addr len , finish conversion )
173 2drop hld @ pad over -
175 : sign ( n -- , add '-' if negative )
176 0< if ascii - hold then
178 : # ( d -- d , convert one digit )
179 base @ mu/mod rot 9 over <
184 : #s ( d -- d , convert remaining digits )
190 : (UD.) ( ud -- c-addr cnt )
193 : UD. ( ud -- , print unsigned double number )
197 >r (ud.) r> over - spaces type
199 : (D.) ( d -- c-addr cnt )
200 tuck dabs <# #s rot sign #>
205 : D.R ( d n -- , right justified )
206 >r (d.) r> over - spaces type
209 : (U.) ( u -- c-addr cnt )
212 : U. ( u -- , print unsigned number )
215 : U.R ( u n -- , print right justified )
216 >r (u.) r> over - spaces type
218 : (.) ( n -- c-addr cnt )
219 dup abs 0 <# #s rot sign #>
221 : . ( n -- , print signed number)
224 : .R ( n l -- , print right justified)
225 >r (.) r> over - spaces type