HCoop / bpt / guile.git / blame
| Commit | Line | Data |
|---|---|---|
| 7da43e41 | 1 | ;;;; "format.scm" Common LISP text output formatter for SLIB |
| afd08fdf | 2 | ;;; Copyright (C) 2010, 2011, 2012 Free Software Foundation, Inc. |
| e3e33943 AW |
3 | ;;; |
| 4 | ;;; This library is free software; you can redistribute it and/or | |
| 5 | ;;; modify it under the terms of the GNU Lesser General Public | |
| 6 | ;;; License as published by the Free Software Foundation; either | |
| 7 | ;;; version 3 of the License, or (at your option) any later version. | |
| 8 | ;;; | |
| 9 | ;;; This library is distributed in the hope that it will be useful, | |
| 10 | ;;; but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 11 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 12 | ;;; Lesser General Public License for more details. | |
| 13 | ;;; | |
| 14 | ;;; You should have received a copy of the GNU Lesser General Public | |
| 15 | ;;; License along with this library; if not, write to the Free Software | |
| 16 | ;;; Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 17 | ;;; | |
| 18 | ||
| 19 | ;;; This code was orignally in the public domain. | |
| 20 | ;;; | |
| 21 | ;;; Written 1992-1994 by Dirk Lutzebaeck (lutzeb@cs.tu-berlin.de). | |
| 22 | ;;; | |
| 23 | ;;; Authors of the version from SLIB (< 1.4) were Ken Dickey and Aubrey | |
| 24 | ;;; Jaffer. | |
| 25 | ;;; | |
| 26 | ;;; Assimilated into Guile May 1999. | |
| 27 | ;;; | |
| 28 | ;;; Please don't bother the original authors with bug reports, though; | |
| 29 | ;;; send them to bug-guile@gnu.org. | |
| 30 | ;;; | |
| 7da43e41 | 31 | |
| b337528f | 32 | (define-module (ice-9 format) |
| e3e33943 | 33 | #:autoload (ice-9 pretty-print) (pretty-print truncated-print) |
| afd08fdf | 34 | #:autoload (ice-9 i18n) (%global-locale number->locale-string) |
| 9ebf1af3 | 35 | #:replace (format)) |
| 7da43e41 | 36 | |
| b90b4b2b | 37 | (define format:version "3.0") |
| 7da43e41 | 38 | |
| 098e6fc6 | 39 | (define (format destination format-string . format-args) |
| 8390dac0 AW |
40 | (if (not (string? format-string)) |
| 41 | (error "format: expected a string for format string" format-string)) | |
| 42 | ||
| 79f124ac | 43 | (let* ((port |
| 8390dac0 | 44 | (cond |
| 1497e87a LC |
45 | ((not destination) |
| 46 | ;; Use a Unicode-capable output string port. | |
| 47 | (with-fluids ((%default-port-encoding "UTF-8")) | |
| 48 | (open-output-string))) | |
| 8390dac0 AW |
49 | ((boolean? destination) (current-output-port)) ; boolean but not false |
| 50 | ((output-port? destination) destination) | |
| 51 | ((number? destination) | |
| 52 | (issue-deprecation-warning | |
| 53 | "Passing a number to format as the port is deprecated." | |
| 54 | "Pass (current-error-port) instead.") | |
| 55 | (current-error-port)) | |
| 56 | (else | |
| 57 | (error "format: bad destination `~a'" destination)))) | |
| 8390dac0 | 58 | |
| b90b4b2b AW |
59 | (output-col (or (port-column port) 0)) |
| 60 | ||
| 61 | (flush-output? #f)) | |
| 62 | ||
| 8390dac0 AW |
63 | (define format:case-conversion #f) |
| 64 | (define format:pos 0) ; curr. format string parsing position | |
| 65 | (define format:arg-pos 0) ; curr. format argument position | |
| 7da43e41 | 66 | ; this is global for error presentation |
| 093d2ca9 | 67 | |
| 79f124ac | 68 | ;; format string and char output routines on port |
| 8390dac0 AW |
69 | |
| 70 | (define (format:out-str str) | |
| 71 | (if format:case-conversion | |
| 79f124ac AW |
72 | (display (format:case-conversion str) port) |
| 73 | (display str port)) | |
| 74 | (set! output-col | |
| 75 | (+ output-col (string-length str)))) | |
| 8390dac0 AW |
76 | |
| 77 | (define (format:out-char ch) | |
| 78 | (if format:case-conversion | |
| 79 | (display (format:case-conversion (string ch)) | |
| 79f124ac AW |
80 | port) |
| 81 | (write-char ch port)) | |
| 82 | (set! output-col | |
| 8390dac0 AW |
83 | (if (char=? ch #\newline) |
| 84 | 0 | |
| 79f124ac | 85 | (+ output-col 1)))) |
| 093d2ca9 | 86 | |
| 8390dac0 | 87 | ;;(define (format:out-substr str i n) ; this allocates a new string |
| 79f124ac AW |
88 | ;; (display (substring str i n) port) |
| 89 | ;; (set! output-col (+ output-col n))) | |
| 8390dac0 AW |
90 | |
| 91 | (define (format:out-substr str i n) | |
| 92 | (do ((k i (+ k 1))) | |
| 93 | ((= k n)) | |
| 79f124ac AW |
94 | (write-char (string-ref str k) port)) |
| 95 | (set! output-col (+ output-col (- n i)))) | |
| 8390dac0 AW |
96 | |
| 97 | ;;(define (format:out-fill n ch) ; this allocates a new string | |
| 98 | ;; (format:out-str (make-string n ch))) | |
| 99 | ||
| 100 | (define (format:out-fill n ch) | |
| 101 | (do ((i 0 (+ i 1))) | |
| 102 | ((= i n)) | |
| 79f124ac AW |
103 | (write-char ch port)) |
| 104 | (set! output-col (+ output-col n))) | |
| 8390dac0 AW |
105 | |
| 106 | ;; format's user error handler | |
| 107 | ||
| 108 | (define (format:error . args) ; never returns! | |
| 109 | (let ((port (current-error-port))) | |
| 110 | (set! format:error format:intern-error) | |
| 111 | (if (not (zero? format:arg-pos)) | |
| 112 | (set! format:arg-pos (- format:arg-pos 1))) | |
| 113 | (format port | |
| 114 | "~%FORMAT: error with call: (format ~a \"~a<===~a\" ~ | |
| 7da43e41 | 115 | ~{~a ~}===>~{~a ~})~% " |
| 8390dac0 AW |
116 | destination |
| 117 | (substring format-string 0 format:pos) | |
| 118 | (substring format-string format:pos | |
| 119 | (string-length format-string)) | |
| 120 | (list-head format-args format:arg-pos) | |
| 121 | (list-tail format-args format:arg-pos)) | |
| 122 | (apply format port args) | |
| 123 | (newline port) | |
| 124 | (set! format:error format:error-save) | |
| 125 | (format:abort))) | |
| 126 | ||
| 127 | (define (format:intern-error . args) | |
| 128 | ;;if something goes wrong in format:error | |
| 129 | (display "FORMAT: INTERNAL ERROR IN FORMAT:ERROR!") (newline) | |
| 130 | (display " destination: ") (write destination) (newline) | |
| 131 | (display " format string: ") (write format-string) (newline) | |
| 132 | (display " format args: ") (write format-args) (newline) | |
| 133 | (display " error args: ") (write args) (newline) | |
| 29d096c8 | 134 | (set! format:error format:error-save) |
| 8390dac0 | 135 | (format:abort)) |
| 093d2ca9 | 136 | |
| 8390dac0 | 137 | (define format:error-save format:error) |
| 0e930680 | 138 | |
| 8390dac0 AW |
139 | (define format:parameter-characters |
| 140 | '(#\0 #\1 #\2 #\3 #\4 #\5 #\6 #\7 #\8 #\9 #\- #\+ #\v #\# #\')) | |
| 141 | ||
| 142 | (define (format:format-work format-string arglist) ; does the formatting work | |
| 143 | (letrec | |
| 144 | ((format-string-len (string-length format-string)) | |
| 145 | (arg-pos 0) ; argument position in arglist | |
| 146 | (arg-len (length arglist)) ; number of arguments | |
| 147 | (modifier #f) ; 'colon | 'at | 'colon-at | #f | |
| 148 | (params '()) ; directive parameter list | |
| 149 | (param-value-found #f) ; a directive | |
| 093d2ca9 MV |
150 | ; parameter value |
| 151 | ; found | |
| 8390dac0 AW |
152 | (conditional-nest 0) ; conditional nesting level |
| 153 | (clause-pos 0) ; last cond. clause | |
| 093d2ca9 | 154 | ; beginning char pos |
| 8390dac0 | 155 | (clause-default #f) ; conditional default |
| 093d2ca9 | 156 | ; clause string |
| 8390dac0 | 157 | (clauses '()) ; conditional clause |
| 093d2ca9 | 158 | ; string list |
| 8390dac0 | 159 | (conditional-type #f) ; reflects the |
| 093d2ca9 | 160 | ; contional modifiers |
| 8390dac0 AW |
161 | (conditional-arg #f) ; argument to apply the conditional |
| 162 | (iteration-nest 0) ; iteration nesting level | |
| 163 | (iteration-pos 0) ; iteration string | |
| 093d2ca9 | 164 | ; beginning char pos |
| 8390dac0 | 165 | (iteration-type #f) ; reflects the |
| 093d2ca9 | 166 | ; iteration modifiers |
| 8390dac0 | 167 | (max-iterations #f) ; maximum number of |
| 093d2ca9 | 168 | ; iterations |
| 8390dac0 | 169 | (recursive-pos-save format:pos) |
| 093d2ca9 | 170 | |
| 8390dac0 | 171 | (next-char ; gets the next char |
| 093d2ca9 | 172 | ; from format-string |
| 8390dac0 AW |
173 | (lambda () |
| 174 | (let ((ch (peek-next-char))) | |
| 175 | (set! format:pos (+ 1 format:pos)) | |
| 176 | ch))) | |
| 093d2ca9 | 177 | |
| 8390dac0 AW |
178 | (peek-next-char |
| 179 | (lambda () | |
| 180 | (if (>= format:pos format-string-len) | |
| 181 | (format:error "illegal format string") | |
| 182 | (string-ref format-string format:pos)))) | |
| 093d2ca9 | 183 | |
| 8390dac0 AW |
184 | (one-positive-integer? |
| 185 | (lambda (params) | |
| 186 | (cond | |
| 187 | ((null? params) #f) | |
| 188 | ((and (integer? (car params)) | |
| 189 | (>= (car params) 0) | |
| 190 | (= (length params) 1)) #t) | |
| 191 | (else | |
| 192 | (format:error | |
| 193 | "one positive integer parameter expected"))))) | |
| 093d2ca9 | 194 | |
| 8390dac0 AW |
195 | (next-arg |
| 196 | (lambda () | |
| 197 | (if (>= arg-pos arg-len) | |
| 198 | (begin | |
| 199 | (set! format:arg-pos (+ arg-len 1)) | |
| 200 | (format:error "missing argument(s)"))) | |
| 201 | (add-arg-pos 1) | |
| 202 | (list-ref arglist (- arg-pos 1)))) | |
| 093d2ca9 | 203 | |
| 8390dac0 AW |
204 | (prev-arg |
| 205 | (lambda () | |
| 206 | (add-arg-pos -1) | |
| 207 | (if (negative? arg-pos) | |
| 208 | (format:error "missing backward argument(s)")) | |
| 209 | (list-ref arglist arg-pos))) | |
| 093d2ca9 | 210 | |
| 8390dac0 AW |
211 | (rest-args |
| 212 | (lambda () | |
| 213 | (let loop ((l arglist) (k arg-pos)) ; list-tail definition | |
| 214 | (if (= k 0) l (loop (cdr l) (- k 1)))))) | |
| 093d2ca9 | 215 | |
| 8390dac0 AW |
216 | (add-arg-pos |
| 217 | (lambda (n) | |
| 218 | (set! arg-pos (+ n arg-pos)) | |
| 219 | (set! format:arg-pos arg-pos))) | |
| 093d2ca9 | 220 | |
| 8390dac0 AW |
221 | (anychar-dispatch ; dispatches the format-string |
| 222 | (lambda () | |
| 223 | (if (>= format:pos format-string-len) | |
| 224 | arg-pos ; used for ~? continuance | |
| 225 | (let ((char (next-char))) | |
| 226 | (cond | |
| 227 | ((char=? char #\~) | |
| 228 | (set! modifier #f) | |
| 229 | (set! params '()) | |
| 230 | (set! param-value-found #f) | |
| 231 | (tilde-dispatch)) | |
| 232 | (else | |
| 233 | (if (and (zero? conditional-nest) | |
| 234 | (zero? iteration-nest)) | |
| 235 | (format:out-char char)) | |
| 236 | (anychar-dispatch))))))) | |
| 093d2ca9 | 237 | |
| 8390dac0 AW |
238 | (tilde-dispatch |
| 239 | (lambda () | |
| 240 | (cond | |
| 241 | ((>= format:pos format-string-len) | |
| 242 | (format:out-str "~") ; tilde at end of | |
| 093d2ca9 MV |
243 | ; string is just |
| 244 | ; output | |
| 8390dac0 | 245 | arg-pos) ; used for ~? |
| 093d2ca9 | 246 | ; continuance |
| 8390dac0 AW |
247 | ((and (or (zero? conditional-nest) |
| 248 | (memv (peek-next-char) ; find conditional | |
| 093d2ca9 | 249 | ; directives |
| 8390dac0 AW |
250 | (append '(#\[ #\] #\; #\: #\@ #\^) |
| 251 | format:parameter-characters))) | |
| 252 | (or (zero? iteration-nest) | |
| 253 | (memv (peek-next-char) ; find iteration | |
| 093d2ca9 | 254 | ; directives |
| 8390dac0 AW |
255 | (append '(#\{ #\} #\: #\@ #\^) |
| 256 | format:parameter-characters)))) | |
| 257 | (case (char-upcase (next-char)) | |
| 093d2ca9 | 258 | |
| 8390dac0 | 259 | ;; format directives |
| 093d2ca9 | 260 | |
| 8390dac0 AW |
261 | ((#\A) ; Any -- for humans |
| 262 | (set! format:read-proof | |
| 263 | (memq modifier '(colon colon-at))) | |
| 264 | (format:out-obj-padded (memq modifier '(at colon-at)) | |
| 265 | (next-arg) #f params) | |
| 266 | (anychar-dispatch)) | |
| 267 | ((#\S) ; Slashified -- for parsers | |
| 268 | (set! format:read-proof | |
| 269 | (memq modifier '(colon colon-at))) | |
| 270 | (format:out-obj-padded (memq modifier '(at colon-at)) | |
| 271 | (next-arg) #t params) | |
| 272 | (anychar-dispatch)) | |
| 273 | ((#\D) ; Decimal | |
| 274 | (format:out-num-padded modifier (next-arg) params 10) | |
| 275 | (anychar-dispatch)) | |
| afd08fdf LC |
276 | ((#\H) ; Localized number |
| 277 | (let* ((num (next-arg)) | |
| 278 | (locale (case modifier | |
| 279 | ((colon) (next-arg)) | |
| 280 | (else %global-locale))) | |
| 281 | (argc (length params)) | |
| 282 | (width (format:par params argc 0 #f "width")) | |
| 283 | (decimals (format:par params argc 1 #t "decimals")) | |
| 284 | (padchar (integer->char | |
| 285 | (format:par params argc 2 format:space-ch | |
| 286 | "padchar"))) | |
| 287 | (str (number->locale-string num decimals | |
| 288 | locale))) | |
| 289 | (format:out-str (if (and width | |
| 290 | (< (string-length str) width)) | |
| 291 | (string-pad str width padchar) | |
| 292 | str))) | |
| 293 | (anychar-dispatch)) | |
| 8390dac0 AW |
294 | ((#\X) ; Hexadecimal |
| 295 | (format:out-num-padded modifier (next-arg) params 16) | |
| 296 | (anychar-dispatch)) | |
| 297 | ((#\O) ; Octal | |
| 298 | (format:out-num-padded modifier (next-arg) params 8) | |
| 299 | (anychar-dispatch)) | |
| 300 | ((#\B) ; Binary | |
| 301 | (format:out-num-padded modifier (next-arg) params 2) | |
| 302 | (anychar-dispatch)) | |
| 303 | ((#\R) | |
| 304 | (if (null? params) | |
| 305 | (format:out-obj-padded ; Roman, cardinal, | |
| 093d2ca9 | 306 | ; ordinal numerals |
| 8390dac0 AW |
307 | #f |
| 308 | ((case modifier | |
| 309 | ((at) format:num->roman) | |
| 310 | ((colon-at) format:num->old-roman) | |
| 311 | ((colon) format:num->ordinal) | |
| 312 | (else format:num->cardinal)) | |
| 313 | (next-arg)) | |
| 314 | #f params) | |
| 315 | (format:out-num-padded ; any Radix | |
| 316 | modifier (next-arg) (cdr params) (car params))) | |
| 317 | (anychar-dispatch)) | |
| 318 | ((#\F) ; Fixed-format floating-point | |
| 319 | (format:out-fixed modifier (next-arg) params) | |
| 320 | (anychar-dispatch)) | |
| 321 | ((#\E) ; Exponential floating-point | |
| 322 | (format:out-expon modifier (next-arg) params) | |
| 323 | (anychar-dispatch)) | |
| 324 | ((#\G) ; General floating-point | |
| 325 | (format:out-general modifier (next-arg) params) | |
| 326 | (anychar-dispatch)) | |
| 327 | ((#\$) ; Dollars floating-point | |
| 328 | (format:out-dollar modifier (next-arg) params) | |
| 329 | (anychar-dispatch)) | |
| 330 | ((#\I) ; Complex numbers | |
| 331 | (let ((z (next-arg))) | |
| 332 | (if (not (complex? z)) | |
| 333 | (format:error "argument not a complex number")) | |
| 334 | (format:out-fixed modifier (real-part z) params) | |
| 335 | (format:out-fixed 'at (imag-part z) params) | |
| 336 | (format:out-char #\i)) | |
| 337 | (anychar-dispatch)) | |
| 338 | ((#\C) ; Character | |
| 339 | (let ((ch (if (one-positive-integer? params) | |
| 340 | (integer->char (car params)) | |
| 341 | (next-arg)))) | |
| 342 | (if (not (char? ch)) | |
| 343 | (format:error "~~c expects a character")) | |
| 344 | (case modifier | |
| 345 | ((at) | |
| b90b4b2b | 346 | (format:out-str (object->string ch))) |
| 8390dac0 AW |
347 | ((colon) |
| 348 | (let ((c (char->integer ch))) | |
| 349 | (if (< c 0) | |
| 350 | (set! c (+ c 256))) ; compensate | |
| 093d2ca9 MV |
351 | ; complement |
| 352 | ; impl. | |
| 8390dac0 AW |
353 | (cond |
| 354 | ((< c #x20) ; assumes that control | |
| 093d2ca9 | 355 | ; chars are < #x20 |
| 8390dac0 AW |
356 | (format:out-char #\^) |
| 357 | (format:out-char | |
| 358 | (integer->char (+ c #x40)))) | |
| 359 | ((>= c #x7f) | |
| 360 | (format:out-str "#\\") | |
| 361 | (format:out-str | |
| 362 | (number->string c 8))) | |
| 363 | (else | |
| 364 | (format:out-char ch))))) | |
| 365 | (else (format:out-char ch)))) | |
| 366 | (anychar-dispatch)) | |
| 367 | ((#\P) ; Plural | |
| 368 | (if (memq modifier '(colon colon-at)) | |
| 369 | (prev-arg)) | |
| 370 | (let ((arg (next-arg))) | |
| 371 | (if (not (number? arg)) | |
| 372 | (format:error "~~p expects a number argument")) | |
| 373 | (if (= arg 1) | |
| 374 | (if (memq modifier '(at colon-at)) | |
| 375 | (format:out-char #\y)) | |
| 376 | (if (memq modifier '(at colon-at)) | |
| 377 | (format:out-str "ies") | |
| 378 | (format:out-char #\s)))) | |
| 379 | (anychar-dispatch)) | |
| 380 | ((#\~) ; Tilde | |
| 381 | (if (one-positive-integer? params) | |
| 382 | (format:out-fill (car params) #\~) | |
| 383 | (format:out-char #\~)) | |
| 384 | (anychar-dispatch)) | |
| 385 | ((#\%) ; Newline | |
| 386 | (if (one-positive-integer? params) | |
| 387 | (format:out-fill (car params) #\newline) | |
| 388 | (format:out-char #\newline)) | |
| 79f124ac | 389 | (set! output-col 0) |
| 8390dac0 AW |
390 | (anychar-dispatch)) |
| 391 | ((#\&) ; Fresh line | |
| 392 | (if (one-positive-integer? params) | |
| 393 | (begin | |
| 394 | (if (> (car params) 0) | |
| 395 | (format:out-fill (- (car params) | |
| 396 | (if (> | |
| 79f124ac | 397 | output-col |
| 8390dac0 AW |
398 | 0) 0 1)) |
| 399 | #\newline)) | |
| 79f124ac AW |
400 | (set! output-col 0)) |
| 401 | (if (> output-col 0) | |
| 8390dac0 AW |
402 | (format:out-char #\newline))) |
| 403 | (anychar-dispatch)) | |
| 404 | ((#\_) ; Space character | |
| 405 | (if (one-positive-integer? params) | |
| 406 | (format:out-fill (car params) #\space) | |
| 407 | (format:out-char #\space)) | |
| 408 | (anychar-dispatch)) | |
| 409 | ((#\/) ; Tabulator character | |
| 410 | (if (one-positive-integer? params) | |
| 411 | (format:out-fill (car params) #\tab) | |
| 412 | (format:out-char #\tab)) | |
| 413 | (anychar-dispatch)) | |
| 414 | ((#\|) ; Page seperator | |
| 415 | (if (one-positive-integer? params) | |
| 416 | (format:out-fill (car params) #\page) | |
| 417 | (format:out-char #\page)) | |
| 79f124ac | 418 | (set! output-col 0) |
| 8390dac0 AW |
419 | (anychar-dispatch)) |
| 420 | ((#\T) ; Tabulate | |
| 421 | (format:tabulate modifier params) | |
| 422 | (anychar-dispatch)) | |
| 423 | ((#\Y) ; Structured print | |
| 424 | (let ((width (if (one-positive-integer? params) | |
| 425 | (car params) | |
| 426 | 79))) | |
| 427 | (case modifier | |
| 428 | ((at) | |
| 429 | (format:out-str | |
| 6c922006 LC |
430 | (call-with-output-string |
| 431 | (lambda (p) | |
| 432 | (truncated-print (next-arg) p | |
| 8390dac0 AW |
433 | #:width width))))) |
| 434 | ((colon-at) | |
| 435 | (format:out-str | |
| 6c922006 LC |
436 | (call-with-output-string |
| 437 | (lambda (p) | |
| 438 | (truncated-print (next-arg) p | |
| 8390dac0 AW |
439 | #:width |
| 440 | (max (- width | |
| 79f124ac | 441 | output-col) |
| 8390dac0 AW |
442 | 1)))))) |
| 443 | ((colon) | |
| 444 | (format:error "illegal modifier in ~~?")) | |
| 445 | (else | |
| 79f124ac | 446 | (pretty-print (next-arg) port |
| 8390dac0 | 447 | #:width width) |
| 79f124ac | 448 | (set! output-col 0)))) |
| 8390dac0 AW |
449 | (anychar-dispatch)) |
| 450 | ((#\? #\K) ; Indirection (is "~K" in T-Scheme) | |
| 451 | (cond | |
| 452 | ((memq modifier '(colon colon-at)) | |
| 453 | (format:error "illegal modifier in ~~?")) | |
| 454 | ((eq? modifier 'at) | |
| 455 | (let* ((frmt (next-arg)) | |
| 456 | (args (rest-args))) | |
| 457 | (add-arg-pos (format:format-work frmt args)))) | |
| 458 | (else | |
| 459 | (let* ((frmt (next-arg)) | |
| 460 | (args (next-arg))) | |
| 461 | (format:format-work frmt args)))) | |
| 462 | (anychar-dispatch)) | |
| 463 | ((#\!) ; Flush output | |
| b90b4b2b | 464 | (set! flush-output? #t) |
| 8390dac0 AW |
465 | (anychar-dispatch)) |
| 466 | ((#\newline) ; Continuation lines | |
| 467 | (if (eq? modifier 'at) | |
| 468 | (format:out-char #\newline)) | |
| 469 | (if (< format:pos format-string-len) | |
| 470 | (do ((ch (peek-next-char) (peek-next-char))) | |
| 471 | ((or (not (char-whitespace? ch)) | |
| 472 | (= format:pos (- format-string-len 1)))) | |
| 473 | (if (eq? modifier 'colon) | |
| 474 | (format:out-char (next-char)) | |
| 475 | (next-char)))) | |
| 476 | (anychar-dispatch)) | |
| 477 | ((#\*) ; Argument jumping | |
| 29d096c8 | 478 | (case modifier |
| 8390dac0 AW |
479 | ((colon) ; jump backwards |
| 480 | (if (one-positive-integer? params) | |
| 481 | (do ((i 0 (+ i 1))) | |
| 482 | ((= i (car params))) | |
| 483 | (prev-arg)) | |
| 484 | (prev-arg))) | |
| 485 | ((at) ; jump absolute | |
| 486 | (set! arg-pos (if (one-positive-integer? params) | |
| 487 | (car params) 0))) | |
| 29d096c8 | 488 | ((colon-at) |
| 8390dac0 AW |
489 | (format:error "illegal modifier `:@' in ~~* directive")) |
| 490 | (else ; jump forward | |
| 491 | (if (one-positive-integer? params) | |
| 492 | (do ((i 0 (+ i 1))) | |
| 493 | ((= i (car params))) | |
| 494 | (next-arg)) | |
| 495 | (next-arg)))) | |
| 496 | (anychar-dispatch)) | |
| 497 | ((#\() ; Case conversion begin | |
| 498 | (set! format:case-conversion | |
| 499 | (case modifier | |
| 500 | ((at) string-capitalize-first) | |
| 501 | ((colon) string-capitalize) | |
| 502 | ((colon-at) string-upcase) | |
| 503 | (else string-downcase))) | |
| 504 | (anychar-dispatch)) | |
| 505 | ((#\)) ; Case conversion end | |
| 506 | (if (not format:case-conversion) | |
| 507 | (format:error "missing ~~(")) | |
| 508 | (set! format:case-conversion #f) | |
| 509 | (anychar-dispatch)) | |
| 510 | ((#\[) ; Conditional begin | |
| 511 | (set! conditional-nest (+ conditional-nest 1)) | |
| 512 | (cond | |
| 513 | ((= conditional-nest 1) | |
| 514 | (set! clause-pos format:pos) | |
| 515 | (set! clause-default #f) | |
| 516 | (set! clauses '()) | |
| 517 | (set! conditional-type | |
| 518 | (case modifier | |
| 519 | ((at) 'if-then) | |
| 520 | ((colon) 'if-else-then) | |
| 521 | ((colon-at) (format:error "illegal modifier in ~~[")) | |
| 522 | (else 'num-case))) | |
| 523 | (set! conditional-arg | |
| 524 | (if (one-positive-integer? params) | |
| 525 | (car params) | |
| 526 | (next-arg))))) | |
| 527 | (anychar-dispatch)) | |
| 528 | ((#\;) ; Conditional separator | |
| 529 | (if (zero? conditional-nest) | |
| 530 | (format:error "~~; not in ~~[~~] conditional")) | |
| 531 | (if (not (null? params)) | |
| 532 | (format:error "no parameter allowed in ~~;")) | |
| 533 | (if (= conditional-nest 1) | |
| 534 | (let ((clause-str | |
| 535 | (cond | |
| 536 | ((eq? modifier 'colon) | |
| 537 | (set! clause-default #t) | |
| 538 | (substring format-string clause-pos | |
| 539 | (- format:pos 3))) | |
| 540 | ((memq modifier '(at colon-at)) | |
| 541 | (format:error "illegal modifier in ~~;")) | |
| 542 | (else | |
| 543 | (substring format-string clause-pos | |
| 544 | (- format:pos 2)))))) | |
| 545 | (set! clauses (append clauses (list clause-str))) | |
| 546 | (set! clause-pos format:pos))) | |
| 547 | (anychar-dispatch)) | |
| 548 | ((#\]) ; Conditional end | |
| 549 | (if (zero? conditional-nest) (format:error "missing ~~[")) | |
| 550 | (set! conditional-nest (- conditional-nest 1)) | |
| 551 | (if modifier | |
| 552 | (format:error "no modifier allowed in ~~]")) | |
| 553 | (if (not (null? params)) | |
| 554 | (format:error "no parameter allowed in ~~]")) | |
| 555 | (cond | |
| 556 | ((zero? conditional-nest) | |
| 557 | (let ((clause-str (substring format-string clause-pos | |
| 558 | (- format:pos 2)))) | |
| 559 | (if clause-default | |
| 560 | (set! clause-default clause-str) | |
| 561 | (set! clauses (append clauses (list clause-str))))) | |
| 562 | (case conditional-type | |
| 563 | ((if-then) | |
| 564 | (if conditional-arg | |
| 565 | (format:format-work (car clauses) | |
| 566 | (list conditional-arg)))) | |
| 567 | ((if-else-then) | |
| 568 | (add-arg-pos | |
| 569 | (format:format-work (if conditional-arg | |
| 570 | (cadr clauses) | |
| 571 | (car clauses)) | |
| 572 | (rest-args)))) | |
| 573 | ((num-case) | |
| 574 | (if (or (not (integer? conditional-arg)) | |
| 575 | (< conditional-arg 0)) | |
| 576 | (format:error "argument not a positive integer")) | |
| 577 | (if (not (and (>= conditional-arg (length clauses)) | |
| 578 | (not clause-default))) | |
| 579 | (add-arg-pos | |
| 580 | (format:format-work | |
| 581 | (if (>= conditional-arg (length clauses)) | |
| 582 | clause-default | |
| 583 | (list-ref clauses conditional-arg)) | |
| 584 | (rest-args)))))))) | |
| 585 | (anychar-dispatch)) | |
| 586 | ((#\{) ; Iteration begin | |
| 587 | (set! iteration-nest (+ iteration-nest 1)) | |
| 588 | (cond | |
| 589 | ((= iteration-nest 1) | |
| 590 | (set! iteration-pos format:pos) | |
| 591 | (set! iteration-type | |
| 592 | (case modifier | |
| 593 | ((at) 'rest-args) | |
| 594 | ((colon) 'sublists) | |
| 595 | ((colon-at) 'rest-sublists) | |
| 596 | (else 'list))) | |
| 597 | (set! max-iterations (if (one-positive-integer? params) | |
| 598 | (car params) #f)))) | |
| 599 | (anychar-dispatch)) | |
| 600 | ((#\}) ; Iteration end | |
| 601 | (if (zero? iteration-nest) (format:error "missing ~~{")) | |
| 602 | (set! iteration-nest (- iteration-nest 1)) | |
| 603 | (case modifier | |
| 29d096c8 | 604 | ((colon) |
| 8390dac0 AW |
605 | (if (not max-iterations) (set! max-iterations 1))) |
| 606 | ((colon-at at) (format:error "illegal modifier"))) | |
| 607 | (if (not (null? params)) | |
| 608 | (format:error "no parameters allowed in ~~}")) | |
| 609 | (if (zero? iteration-nest) | |
| 610 | (let ((iteration-str | |
| 611 | (substring format-string iteration-pos | |
| 612 | (- format:pos (if modifier 3 2))))) | |
| 613 | (if (string=? iteration-str "") | |
| 614 | (set! iteration-str (next-arg))) | |
| 615 | (case iteration-type | |
| 616 | ((list) | |
| 617 | (let ((args (next-arg)) | |
| 618 | (args-len 0)) | |
| 619 | (if (not (list? args)) | |
| 620 | (format:error "expected a list argument")) | |
| 621 | (set! args-len (length args)) | |
| 622 | (do ((arg-pos 0 (+ arg-pos | |
| 623 | (format:format-work | |
| 624 | iteration-str | |
| 625 | (list-tail args arg-pos)))) | |
| 626 | (i 0 (+ i 1))) | |
| 627 | ((or (>= arg-pos args-len) | |
| 628 | (and max-iterations | |
| 629 | (>= i max-iterations))))))) | |
| 630 | ((sublists) | |
| 631 | (let ((args (next-arg)) | |
| 632 | (args-len 0)) | |
| 633 | (if (not (list? args)) | |
| 634 | (format:error "expected a list argument")) | |
| 635 | (set! args-len (length args)) | |
| 636 | (do ((arg-pos 0 (+ arg-pos 1))) | |
| 637 | ((or (>= arg-pos args-len) | |
| 638 | (and max-iterations | |
| 639 | (>= arg-pos max-iterations)))) | |
| 640 | (let ((sublist (list-ref args arg-pos))) | |
| 641 | (if (not (list? sublist)) | |
| 642 | (format:error | |
| 643 | "expected a list of lists argument")) | |
| 644 | (format:format-work iteration-str sublist))))) | |
| 645 | ((rest-args) | |
| 646 | (let* ((args (rest-args)) | |
| 647 | (args-len (length args)) | |
| 648 | (usedup-args | |
| 649 | (do ((arg-pos 0 (+ arg-pos | |
| 650 | (format:format-work | |
| 651 | iteration-str | |
| 652 | (list-tail | |
| 653 | args arg-pos)))) | |
| 654 | (i 0 (+ i 1))) | |
| 655 | ((or (>= arg-pos args-len) | |
| 656 | (and max-iterations | |
| 657 | (>= i max-iterations))) | |
| 658 | arg-pos)))) | |
| 659 | (add-arg-pos usedup-args))) | |
| 660 | ((rest-sublists) | |
| 661 | (let* ((args (rest-args)) | |
| 662 | (args-len (length args)) | |
| 663 | (usedup-args | |
| 664 | (do ((arg-pos 0 (+ arg-pos 1))) | |
| 665 | ((or (>= arg-pos args-len) | |
| 666 | (and max-iterations | |
| 667 | (>= arg-pos max-iterations))) | |
| 668 | arg-pos) | |
| 669 | (let ((sublist (list-ref args arg-pos))) | |
| 670 | (if (not (list? sublist)) | |
| 671 | (format:error "expected list arguments")) | |
| 672 | (format:format-work iteration-str sublist))))) | |
| 673 | (add-arg-pos usedup-args))) | |
| 674 | (else (format:error "internal error in ~~}"))))) | |
| 675 | (anychar-dispatch)) | |
| 676 | ((#\^) ; Up and out | |
| 677 | (let* ((continue | |
| 678 | (cond | |
| 679 | ((not (null? params)) | |
| 680 | (not | |
| 681 | (case (length params) | |
| 682 | ((1) (zero? (car params))) | |
| 683 | ((2) (= (list-ref params 0) (list-ref params 1))) | |
| 684 | ((3) (<= (list-ref params 0) | |
| 685 | (list-ref params 1) | |
| 686 | (list-ref params 2))) | |
| 687 | (else (format:error "too much parameters"))))) | |
| 688 | (format:case-conversion ; if conversion stop conversion | |
| 689 | (set! format:case-conversion string-copy) #t) | |
| 690 | ((= iteration-nest 1) #t) | |
| 691 | ((= conditional-nest 1) #t) | |
| 692 | ((>= arg-pos arg-len) | |
| 693 | (set! format:pos format-string-len) #f) | |
| 694 | (else #t)))) | |
| 695 | (if continue | |
| 696 | (anychar-dispatch)))) | |
| 697 | ||
| 698 | ;; format directive modifiers and parameters | |
| 699 | ||
| 700 | ((#\@) ; `@' modifier | |
| 701 | (if (memq modifier '(at colon-at)) | |
| 702 | (format:error "double `@' modifier")) | |
| 703 | (set! modifier (if (eq? modifier 'colon) 'colon-at 'at)) | |
| 704 | (tilde-dispatch)) | |
| 705 | ((#\:) ; `:' modifier | |
| 706 | (if (memq modifier '(colon colon-at)) | |
| 707 | (format:error "double `:' modifier")) | |
| 708 | (set! modifier (if (eq? modifier 'at) 'colon-at 'colon)) | |
| 709 | (tilde-dispatch)) | |
| 710 | ((#\') ; Character parameter | |
| 711 | (if modifier (format:error "misplaced modifier")) | |
| 712 | (set! params (append params (list (char->integer (next-char))))) | |
| 713 | (set! param-value-found #t) | |
| 714 | (tilde-dispatch)) | |
| 715 | ((#\0 #\1 #\2 #\3 #\4 #\5 #\6 #\7 #\8 #\9 #\- #\+) ; num. paramtr | |
| 716 | (if modifier (format:error "misplaced modifier")) | |
| 717 | (let ((num-str-beg (- format:pos 1)) | |
| 718 | (num-str-end format:pos)) | |
| 29d096c8 | 719 | (do ((ch (peek-next-char) (peek-next-char))) |
| 8390dac0 AW |
720 | ((not (char-numeric? ch))) |
| 721 | (next-char) | |
| 722 | (set! num-str-end (+ 1 num-str-end))) | |
| 723 | (set! params | |
| 724 | (append params | |
| 725 | (list (string->number | |
| 726 | (substring format-string | |
| 727 | num-str-beg | |
| 728 | num-str-end)))))) | |
| 729 | (set! param-value-found #t) | |
| 730 | (tilde-dispatch)) | |
| 731 | ((#\V) ; Variable parameter from next argum. | |
| 732 | (if modifier (format:error "misplaced modifier")) | |
| 733 | (set! params (append params (list (next-arg)))) | |
| 734 | (set! param-value-found #t) | |
| 735 | (tilde-dispatch)) | |
| 736 | ((#\#) ; Parameter is number of remaining args | |
| 737 | (if param-value-found (format:error "misplaced '#'")) | |
| 738 | (if modifier (format:error "misplaced modifier")) | |
| 739 | (set! params (append params (list (length (rest-args))))) | |
| 740 | (set! param-value-found #t) | |
| 741 | (tilde-dispatch)) | |
| 742 | ((#\,) ; Parameter separators | |
| 743 | (if modifier (format:error "misplaced modifier")) | |
| 744 | (if (not param-value-found) | |
| 745 | (set! params (append params '(#f)))) ; append empty paramtr | |
| 746 | (set! param-value-found #f) | |
| 747 | (tilde-dispatch)) | |
| 748 | ((#\Q) ; Inquiry messages | |
| 749 | (if (eq? modifier 'colon) | |
| 750 | (format:out-str format:version) | |
| 751 | (let ((nl (string #\newline))) | |
| 752 | (format:out-str | |
| 753 | (string-append | |
| 754 | "SLIB Common LISP format version " format:version nl | |
| 755 | " (C) copyright 1992-1994 by Dirk Lutzebaeck" nl | |
| 756 | " please send bug reports to `lutzeb@cs.tu-berlin.de'" | |
| 757 | nl)))) | |
| 758 | (anychar-dispatch)) | |
| 759 | (else ; Unknown tilde directive | |
| 760 | (format:error "unknown control character `~c'" | |
| 761 | (string-ref format-string (- format:pos 1)))))) | |
| 762 | (else (anychar-dispatch)))))) ; in case of conditional | |
| 763 | ||
| 764 | (set! format:pos 0) | |
| 765 | (set! format:arg-pos 0) | |
| 766 | (anychar-dispatch) ; start the formatting | |
| 767 | (set! format:pos recursive-pos-save) | |
| 768 | arg-pos)) ; return the position in the arg. list | |
| 769 | ||
| 770 | ;; when format:read-proof is true, format:obj->str will wrap | |
| 771 | ;; result strings starting with "#<" in an extra pair of double | |
| 772 | ;; quotes. | |
| a6b3219e | 773 | |
| 8390dac0 AW |
774 | (define format:read-proof #f) |
| 775 | ||
| 776 | ;; format:obj->str returns a R4RS representation as a string of | |
| 777 | ;; an arbitrary scheme object. | |
| 778 | ||
| 779 | (define (format:obj->str obj slashify) | |
| 780 | (let ((res (if slashify | |
| 781 | (object->string obj) | |
| 6c922006 | 782 | (call-with-output-string (lambda (p) (display obj p)))))) |
| 8390dac0 AW |
783 | (if (and format:read-proof (string-prefix? "#<" res)) |
| 784 | (object->string res) | |
| 785 | res))) | |
| 786 | ||
| 8390dac0 AW |
787 | (define format:space-ch (char->integer #\space)) |
| 788 | (define format:zero-ch (char->integer #\0)) | |
| 789 | ||
| 790 | (define (format:par pars length index default name) | |
| 791 | (if (> length index) | |
| 792 | (let ((par (list-ref pars index))) | |
| 793 | (if par | |
| 794 | (if name | |
| 795 | (if (< par 0) | |
| 796 | (format:error | |
| 797 | "~s parameter must be a positive integer" name) | |
| 798 | par) | |
| 799 | par) | |
| 800 | default)) | |
| 801 | default)) | |
| 802 | ||
| 803 | (define (format:out-obj-padded pad-left obj slashify pars) | |
| 804 | (if (null? pars) | |
| 805 | (format:out-str (format:obj->str obj slashify)) | |
| 806 | (let ((l (length pars))) | |
| 807 | (let ((mincol (format:par pars l 0 0 "mincol")) | |
| 808 | (colinc (format:par pars l 1 1 "colinc")) | |
| 809 | (minpad (format:par pars l 2 0 "minpad")) | |
| 29d096c8 | 810 | (padchar (integer->char |
| 8390dac0 AW |
811 | (format:par pars l 3 format:space-ch #f))) |
| 812 | (objstr (format:obj->str obj slashify))) | |
| 813 | (if (not pad-left) | |
| 814 | (format:out-str objstr)) | |
| 815 | (do ((objstr-len (string-length objstr)) | |
| 816 | (i minpad (+ i colinc))) | |
| 817 | ((>= (+ objstr-len i) mincol) | |
| 818 | (format:out-fill i padchar))) | |
| 819 | (if pad-left | |
| 820 | (format:out-str objstr)))))) | |
| 821 | ||
| 822 | (define (format:out-num-padded modifier number pars radix) | |
| 823 | (if (not (integer? number)) (format:error "argument not an integer")) | |
| 824 | (let ((numstr (number->string number radix))) | |
| 825 | (if (and (null? pars) (not modifier)) | |
| 826 | (format:out-str numstr) | |
| 827 | (let ((l (length pars)) | |
| 828 | (numstr-len (string-length numstr))) | |
| 829 | (let ((mincol (format:par pars l 0 #f "mincol")) | |
| 830 | (padchar (integer->char | |
| 831 | (format:par pars l 1 format:space-ch #f))) | |
| 832 | (commachar (integer->char | |
| 833 | (format:par pars l 2 (char->integer #\,) #f))) | |
| 834 | (commawidth (format:par pars l 3 3 "commawidth"))) | |
| 835 | (if mincol | |
| 836 | (let ((numlen numstr-len)) ; calc. the output len of number | |
| 837 | (if (and (memq modifier '(at colon-at)) (>= number 0)) | |
| 838 | (set! numlen (+ numlen 1))) | |
| 839 | (if (memq modifier '(colon colon-at)) | |
| 840 | (set! numlen (+ (quotient (- numstr-len | |
| 841 | (if (< number 0) 2 1)) | |
| 842 | commawidth) | |
| 843 | numlen))) | |
| 844 | (if (> mincol numlen) | |
| 845 | (format:out-fill (- mincol numlen) padchar)))) | |
| 846 | (if (and (memq modifier '(at colon-at)) | |
| 847 | (>= number 0)) | |
| 848 | (format:out-char #\+)) | |
| 849 | (if (memq modifier '(colon colon-at)) ; insert comma character | |
| 850 | (let ((start (remainder numstr-len commawidth)) | |
| 851 | (ns (if (< number 0) 1 0))) | |
| 852 | (format:out-substr numstr 0 start) | |
| 853 | (do ((i start (+ i commawidth))) | |
| 854 | ((>= i numstr-len)) | |
| 855 | (if (> i ns) | |
| 856 | (format:out-char commachar)) | |
| 857 | (format:out-substr numstr i (+ i commawidth)))) | |
| 858 | (format:out-str numstr))))))) | |
| 859 | ||
| 860 | (define (format:tabulate modifier pars) | |
| 861 | (let ((l (length pars))) | |
| 862 | (let ((colnum (format:par pars l 0 1 "colnum")) | |
| 863 | (colinc (format:par pars l 1 1 "colinc")) | |
| 864 | (padch (integer->char (format:par pars l 2 format:space-ch #f)))) | |
| 865 | (case modifier | |
| 866 | ((colon colon-at) | |
| 867 | (format:error "unsupported modifier for ~~t")) | |
| 868 | ((at) ; relative tabulation | |
| 869 | (format:out-fill | |
| 870 | (if (= colinc 0) | |
| 871 | colnum ; colnum = colrel | |
| 872 | (do ((c 0 (+ c colinc)) | |
| 79f124ac | 873 | (col (+ output-col colnum))) |
| 8390dac0 | 874 | ((>= c col) |
| 79f124ac | 875 | (- c output-col)))) |
| 8390dac0 AW |
876 | padch)) |
| 877 | (else ; absolute tabulation | |
| 878 | (format:out-fill | |
| 879 | (cond | |
| 79f124ac AW |
880 | ((< output-col colnum) |
| 881 | (- colnum output-col)) | |
| 8390dac0 AW |
882 | ((= colinc 0) |
| 883 | 0) | |
| 884 | (else | |
| 885 | (do ((c colnum (+ c colinc))) | |
| 79f124ac AW |
886 | ((>= c output-col) |
| 887 | (- c output-col))))) | |
| 8390dac0 AW |
888 | padch)))))) |
| 889 | ||
| 890 | ||
| 891 | ;; roman numerals (from dorai@cs.rice.edu). | |
| 892 | ||
| 893 | (define format:roman-alist | |
| 894 | '((1000 #\M) (500 #\D) (100 #\C) (50 #\L) | |
| 895 | (10 #\X) (5 #\V) (1 #\I))) | |
| 896 | ||
| 897 | (define format:roman-boundary-values | |
| 898 | '(100 100 10 10 1 1 #f)) | |
| 899 | ||
| 900 | (define (format:num->old-roman n) | |
| 901 | (if (and (integer? n) (>= n 1)) | |
| 902 | (let loop ((n n) | |
| 903 | (romans format:roman-alist) | |
| 904 | (s '())) | |
| 905 | (if (null? romans) (list->string (reverse s)) | |
| 906 | (let ((roman-val (caar romans)) | |
| 907 | (roman-dgt (cadar romans))) | |
| 908 | (do ((q (quotient n roman-val) (- q 1)) | |
| 909 | (s s (cons roman-dgt s))) | |
| 910 | ((= q 0) | |
| 911 | (loop (remainder n roman-val) | |
| 912 | (cdr romans) s)))))) | |
| 913 | (format:error "only positive integers can be romanized"))) | |
| 914 | ||
| 915 | (define (format:num->roman n) | |
| 916 | (if (and (integer? n) (> n 0)) | |
| 917 | (let loop ((n n) | |
| 918 | (romans format:roman-alist) | |
| 919 | (boundaries format:roman-boundary-values) | |
| 920 | (s '())) | |
| 921 | (if (null? romans) | |
| 922 | (list->string (reverse s)) | |
| 923 | (let ((roman-val (caar romans)) | |
| 924 | (roman-dgt (cadar romans)) | |
| 925 | (bdry (car boundaries))) | |
| 926 | (let loop2 ((q (quotient n roman-val)) | |
| 927 | (r (remainder n roman-val)) | |
| 928 | (s s)) | |
| 929 | (if (= q 0) | |
| 930 | (if (and bdry (>= r (- roman-val bdry))) | |
| 931 | (loop (remainder r bdry) (cdr romans) | |
| 932 | (cdr boundaries) | |
| 933 | (cons roman-dgt | |
| 934 | (append | |
| 935 | (cdr (assv bdry romans)) | |
| 936 | s))) | |
| 937 | (loop r (cdr romans) (cdr boundaries) s)) | |
| 938 | (loop2 (- q 1) r (cons roman-dgt s))))))) | |
| 939 | (format:error "only positive integers can be romanized"))) | |
| 940 | ||
| 941 | ;; cardinals & ordinals (from dorai@cs.rice.edu) | |
| 942 | ||
| 943 | (define format:cardinal-ones-list | |
| 944 | '(#f "one" "two" "three" "four" "five" | |
| 945 | "six" "seven" "eight" "nine" "ten" "eleven" "twelve" "thirteen" | |
| 946 | "fourteen" "fifteen" "sixteen" "seventeen" "eighteen" | |
| 947 | "nineteen")) | |
| 948 | ||
| 949 | (define format:cardinal-tens-list | |
| 950 | '(#f #f "twenty" "thirty" "forty" "fifty" "sixty" "seventy" "eighty" | |
| 951 | "ninety")) | |
| 952 | ||
| 953 | (define (format:num->cardinal999 n) | |
| 954 | ;; this procedure is inspired by the Bruno Haible's CLisp | |
| 955 | ;; function format-small-cardinal, which converts numbers | |
| 956 | ;; in the range 1 to 999, and is used for converting each | |
| 957 | ;; thousand-block in a larger number | |
| 958 | (let* ((hundreds (quotient n 100)) | |
| 959 | (tens+ones (remainder n 100)) | |
| 960 | (tens (quotient tens+ones 10)) | |
| 961 | (ones (remainder tens+ones 10))) | |
| 962 | (append | |
| 963 | (if (> hundreds 0) | |
| 964 | (append | |
| 965 | (string->list | |
| 966 | (list-ref format:cardinal-ones-list hundreds)) | |
| 967 | (string->list" hundred") | |
| 968 | (if (> tens+ones 0) '(#\space) '())) | |
| 969 | '()) | |
| 970 | (if (< tens+ones 20) | |
| 971 | (if (> tens+ones 0) | |
| 972 | (string->list | |
| 973 | (list-ref format:cardinal-ones-list tens+ones)) | |
| 974 | '()) | |
| 975 | (append | |
| 976 | (string->list | |
| 977 | (list-ref format:cardinal-tens-list tens)) | |
| 978 | (if (> ones 0) | |
| 979 | (cons #\- | |
| 980 | (string->list | |
| 981 | (list-ref format:cardinal-ones-list ones))) | |
| 982 | '())))))) | |
| 983 | ||
| 984 | (define format:cardinal-thousand-block-list | |
| 985 | '("" " thousand" " million" " billion" " trillion" " quadrillion" | |
| 986 | " quintillion" " sextillion" " septillion" " octillion" " nonillion" | |
| 987 | " decillion" " undecillion" " duodecillion" " tredecillion" | |
| 988 | " quattuordecillion" " quindecillion" " sexdecillion" " septendecillion" | |
| 989 | " octodecillion" " novemdecillion" " vigintillion")) | |
| 990 | ||
| 991 | (define (format:num->cardinal n) | |
| 992 | (cond ((not (integer? n)) | |
| 993 | (format:error | |
| 994 | "only integers can be converted to English cardinals")) | |
| 995 | ((= n 0) "zero") | |
| 996 | ((< n 0) (string-append "minus " (format:num->cardinal (- n)))) | |
| 997 | (else | |
| 998 | (let ((power3-word-limit | |
| 999 | (length format:cardinal-thousand-block-list))) | |
| 1000 | (let loop ((n n) | |
| 1001 | (power3 0) | |
| 1002 | (s '())) | |
| 1003 | (if (= n 0) | |
| 1004 | (list->string s) | |
| 1005 | (let ((n-before-block (quotient n 1000)) | |
| 1006 | (n-after-block (remainder n 1000))) | |
| 1007 | (loop n-before-block | |
| 1008 | (+ power3 1) | |
| 1009 | (if (> n-after-block 0) | |
| 1010 | (append | |
| 1011 | (if (> n-before-block 0) | |
| 1012 | (string->list ", ") '()) | |
| 1013 | (format:num->cardinal999 n-after-block) | |
| 1014 | (if (< power3 power3-word-limit) | |
| 1015 | (string->list | |
| 1016 | (list-ref | |
| 1017 | format:cardinal-thousand-block-list | |
| 1018 | power3)) | |
| 29d096c8 | 1019 | (append |
| 8390dac0 AW |
1020 | (string->list " times ten to the ") |
| 1021 | (string->list | |
| 1022 | (format:num->ordinal | |
| 1023 | (* power3 3))) | |
| 1024 | (string->list " power"))) | |
| 1025 | s) | |
| 1026 | s))))))))) | |
| 1027 | ||
| 1028 | (define format:ordinal-ones-list | |
| 1029 | '(#f "first" "second" "third" "fourth" "fifth" | |
| 1030 | "sixth" "seventh" "eighth" "ninth" "tenth" "eleventh" "twelfth" | |
| 1031 | "thirteenth" "fourteenth" "fifteenth" "sixteenth" "seventeenth" | |
| 1032 | "eighteenth" "nineteenth")) | |
| 1033 | ||
| 1034 | (define format:ordinal-tens-list | |
| 1035 | '(#f #f "twentieth" "thirtieth" "fortieth" "fiftieth" "sixtieth" | |
| 1036 | "seventieth" "eightieth" "ninetieth")) | |
| 1037 | ||
| 1038 | (define (format:num->ordinal n) | |
| 1039 | (cond ((not (integer? n)) | |
| 1040 | (format:error | |
| 1041 | "only integers can be converted to English ordinals")) | |
| 1042 | ((= n 0) "zeroth") | |
| 1043 | ((< n 0) (string-append "minus " (format:num->ordinal (- n)))) | |
| 1044 | (else | |
| 1045 | (let ((hundreds (quotient n 100)) | |
| 1046 | (tens+ones (remainder n 100))) | |
| 1047 | (string-append | |
| 1048 | (if (> hundreds 0) | |
| 1049 | (string-append | |
| 1050 | (format:num->cardinal (* hundreds 100)) | |
| 1051 | (if (= tens+ones 0) "th" " ")) | |
| 1052 | "") | |
| 1053 | (if (= tens+ones 0) "" | |
| 1054 | (if (< tens+ones 20) | |
| 1055 | (list-ref format:ordinal-ones-list tens+ones) | |
| 1056 | (let ((tens (quotient tens+ones 10)) | |
| 1057 | (ones (remainder tens+ones 10))) | |
| 1058 | (if (= ones 0) | |
| 1059 | (list-ref format:ordinal-tens-list tens) | |
| 1060 | (string-append | |
| 1061 | (list-ref format:cardinal-tens-list tens) | |
| 1062 | "-" | |
| 1063 | (list-ref format:ordinal-ones-list ones)))) | |
| 1064 | ))))))) | |
| 1065 | ||
| 1066 | ;; format inf and nan. | |
| 1067 | ||
| 1068 | (define (format:out-inf-nan number width digits edigits overch padch) | |
| 1069 | ;; inf and nan are always printed exactly as "+inf.0", "-inf.0" or | |
| 1070 | ;; "+nan.0", suitably justified in their field. We insist on | |
| 1071 | ;; printing this exact form so that the numbers can be read back in. | |
| 1072 | (let* ((str (number->string number)) | |
| 1073 | (len (string-length str)) | |
| 1074 | (dot (string-index str #\.)) | |
| 1075 | (digits (+ (or digits 0) | |
| 1076 | (if edigits (+ edigits 2) 0)))) | |
| 1077 | (if (and width overch (< width len)) | |
| 1078 | (format:out-fill width (integer->char overch)) | |
| 1079 | (let* ((leftpad (if width | |
| 1080 | (max (- width (max len (+ dot 1 digits))) 0) | |
| 1081 | 0)) | |
| 1082 | (rightpad (if width | |
| 1083 | (max (- width leftpad len) 0) | |
| 1084 | 0)) | |
| 1085 | (padch (integer->char (or padch format:space-ch)))) | |
| 1086 | (format:out-fill leftpad padch) | |
| 1087 | (format:out-str str) | |
| 1088 | (format:out-fill rightpad padch))))) | |
| 1089 | ||
| 1090 | ;; format fixed flonums (~F) | |
| 1091 | ||
| 1092 | (define (format:out-fixed modifier number pars) | |
| 1093 | (if (not (or (number? number) (string? number))) | |
| 1094 | (format:error "argument is not a number or a number string")) | |
| 1095 | ||
| 1096 | (let ((l (length pars))) | |
| 1097 | (let ((width (format:par pars l 0 #f "width")) | |
| 1098 | (digits (format:par pars l 1 #f "digits")) | |
| 1099 | (scale (format:par pars l 2 0 #f)) | |
| 1100 | (overch (format:par pars l 3 #f #f)) | |
| 1101 | (padch (format:par pars l 4 format:space-ch #f))) | |
| 1102 | ||
| 1103 | (cond | |
| 6a07a061 MW |
1104 | ((and (number? number) |
| 1105 | (or (inf? number) (nan? number))) | |
| 8390dac0 AW |
1106 | (format:out-inf-nan number width digits #f overch padch)) |
| 1107 | ||
| 1108 | (digits | |
| 1109 | (format:parse-float number #t scale) | |
| 29d096c8 AW |
1110 | (if (<= (- format:fn-len format:fn-dot) digits) |
| 1111 | (format:fn-zfill #f (- digits (- format:fn-len format:fn-dot))) | |
| 1112 | (format:fn-round digits)) | |
| 8390dac0 AW |
1113 | (if width |
| 1114 | (let ((numlen (+ format:fn-len 1))) | |
| 1115 | (if (or (not format:fn-pos?) (eq? modifier 'at)) | |
| 1116 | (set! numlen (+ numlen 1))) | |
| 1117 | (if (and (= format:fn-dot 0) (> width (+ digits 1))) | |
| 1118 | (set! numlen (+ numlen 1))) | |
| 1119 | (if (< numlen width) | |
| 1120 | (format:out-fill (- width numlen) (integer->char padch))) | |
| 1121 | (if (and overch (> numlen width)) | |
| 1122 | (format:out-fill width (integer->char overch)) | |
| 1123 | (format:fn-out modifier (> width (+ digits 1))))) | |
| 1124 | (format:fn-out modifier #t))) | |
| 1125 | ||
| 1126 | (else | |
| 1127 | (format:parse-float number #t scale) | |
| 1128 | (format:fn-strip) | |
| 1129 | (if width | |
| 1130 | (let ((numlen (+ format:fn-len 1))) | |
| 1131 | (if (or (not format:fn-pos?) (eq? modifier 'at)) | |
| 1132 | (set! numlen (+ numlen 1))) | |
| 1133 | (if (= format:fn-dot 0) | |
| 1134 | (set! numlen (+ numlen 1))) | |
| 1135 | (if (< numlen width) | |
| 1136 | (format:out-fill (- width numlen) (integer->char padch))) | |
| 1137 | (if (> numlen width) ; adjust precision if possible | |
| 1138 | (let ((dot-index (- numlen | |
| 1139 | (- format:fn-len format:fn-dot)))) | |
| 1140 | (if (> dot-index width) | |
| 1141 | (if overch ; numstr too big for required width | |
| 1142 | (format:out-fill width (integer->char overch)) | |
| 1143 | (format:fn-out modifier #t)) | |
| 1144 | (begin | |
| 1145 | (format:fn-round (- width dot-index)) | |
| 1146 | (format:fn-out modifier #t)))) | |
| 1147 | (format:fn-out modifier #t))) | |
| 1148 | (format:fn-out modifier #t))))))) | |
| 1149 | ||
| 1150 | ;; format exponential flonums (~E) | |
| 1151 | ||
| 1152 | (define (format:out-expon modifier number pars) | |
| 1153 | (if (not (or (number? number) (string? number))) | |
| 1154 | (format:error "argument is not a number")) | |
| 1155 | ||
| 1156 | (let ((l (length pars))) | |
| 1157 | (let ((width (format:par pars l 0 #f "width")) | |
| 1158 | (digits (format:par pars l 1 #f "digits")) | |
| 1159 | (edigits (format:par pars l 2 #f "exponent digits")) | |
| 1160 | (scale (format:par pars l 3 1 #f)) | |
| 1161 | (overch (format:par pars l 4 #f #f)) | |
| 1162 | (padch (format:par pars l 5 format:space-ch #f)) | |
| 1163 | (expch (format:par pars l 6 #f #f))) | |
| 1164 | ||
| 1165 | (cond | |
| 6a07a061 MW |
1166 | ((and (number? number) |
| 1167 | (or (inf? number) (nan? number))) | |
| 8390dac0 AW |
1168 | (format:out-inf-nan number width digits edigits overch padch)) |
| 1169 | ||
| 1170 | (digits ; fixed precision | |
| 1171 | ||
| 1172 | (let ((digits (if (> scale 0) | |
| 1173 | (if (< scale (+ digits 2)) | |
| 1174 | (+ (- digits scale) 1) | |
| 1175 | 0) | |
| 1176 | digits))) | |
| 1177 | (format:parse-float number #f scale) | |
| 1178 | (if (<= (- format:fn-len format:fn-dot) digits) | |
| 1179 | (format:fn-zfill #f (- digits (- format:fn-len format:fn-dot))) | |
| 1180 | (format:fn-round digits)) | |
| 1181 | (if width | |
| 1182 | (if (and edigits overch (> format:en-len edigits)) | |
| 1183 | (format:out-fill width (integer->char overch)) | |
| 1184 | (let ((numlen (+ format:fn-len 3))) ; .E+ | |
| 1185 | (if (or (not format:fn-pos?) (eq? modifier 'at)) | |
| 1186 | (set! numlen (+ numlen 1))) | |
| 1187 | (if (and (= format:fn-dot 0) (> width (+ digits 1))) | |
| 1188 | (set! numlen (+ numlen 1))) | |
| 1189 | (set! numlen | |
| 1190 | (+ numlen | |
| 1191 | (if (and edigits (>= edigits format:en-len)) | |
| 1192 | edigits | |
| 1193 | format:en-len))) | |
| 1194 | (if (< numlen width) | |
| 1195 | (format:out-fill (- width numlen) | |
| 1196 | (integer->char padch))) | |
| 1197 | (if (and overch (> numlen width)) | |
| 1198 | (format:out-fill width (integer->char overch)) | |
| 1199 | (begin | |
| 1200 | (format:fn-out modifier (> width (- numlen 1))) | |
| 1201 | (format:en-out edigits expch))))) | |
| 1202 | (begin | |
| 1203 | (format:fn-out modifier #t) | |
| 1204 | (format:en-out edigits expch))))) | |
| 1205 | ||
| 1206 | (else | |
| 1207 | (format:parse-float number #f scale) | |
| 1208 | (format:fn-strip) | |
| 29d096c8 AW |
1209 | (if width |
| 1210 | (if (and edigits overch (> format:en-len edigits)) | |
| 1211 | (format:out-fill width (integer->char overch)) | |
| 1212 | (let ((numlen (+ format:fn-len 3))) ; .E+ | |
| 1213 | (if (or (not format:fn-pos?) (eq? modifier 'at)) | |
| 1214 | (set! numlen (+ numlen 1))) | |
| 8390dac0 AW |
1215 | (if (= format:fn-dot 0) |
| 1216 | (set! numlen (+ numlen 1))) | |
| 29d096c8 | 1217 | (set! numlen |
| 8390dac0 | 1218 | (+ numlen |
| 29d096c8 AW |
1219 | (if (and edigits (>= edigits format:en-len)) |
| 1220 | edigits | |
| 1221 | format:en-len))) | |
| 1222 | (if (< numlen width) | |
| 1223 | (format:out-fill (- width numlen) | |
| 1224 | (integer->char padch))) | |
| 8390dac0 AW |
1225 | (if (> numlen width) ; adjust precision if possible |
| 1226 | (let ((f (- format:fn-len format:fn-dot))) ; fract len | |
| 1227 | (if (> (- numlen f) width) | |
| 1228 | (if overch ; numstr too big for required width | |
| 1229 | (format:out-fill width | |
| 1230 | (integer->char overch)) | |
| 1231 | (begin | |
| 1232 | (format:fn-out modifier #t) | |
| 1233 | (format:en-out edigits expch))) | |
| 1234 | (begin | |
| 1235 | (format:fn-round (+ (- f numlen) width)) | |
| 1236 | (format:fn-out modifier #t) | |
| 1237 | (format:en-out edigits expch)))) | |
| 29d096c8 | 1238 | (begin |
| 8390dac0 | 1239 | (format:fn-out modifier #t) |
| 29d096c8 AW |
1240 | (format:en-out edigits expch))))) |
| 1241 | (begin | |
| 1242 | (format:fn-out modifier #t) | |
| 8390dac0 | 1243 | (format:en-out edigits expch)))))))) |
| 093d2ca9 | 1244 | |
| 8390dac0 AW |
1245 | ;; format general flonums (~G) |
| 1246 | ||
| 1247 | (define (format:out-general modifier number pars) | |
| 1248 | (if (not (or (number? number) (string? number))) | |
| 1249 | (format:error "argument is not a number or a number string")) | |
| 1250 | ||
| 1251 | (let ((l (length pars))) | |
| 1252 | (let ((width (if (> l 0) (list-ref pars 0) #f)) | |
| 1253 | (digits (if (> l 1) (list-ref pars 1) #f)) | |
| 1254 | (edigits (if (> l 2) (list-ref pars 2) #f)) | |
| 1255 | (overch (if (> l 4) (list-ref pars 4) #f)) | |
| 1256 | (padch (if (> l 5) (list-ref pars 5) #f))) | |
| 1257 | (cond | |
| 6a07a061 MW |
1258 | ((and (number? number) |
| 1259 | (or (inf? number) (nan? number))) | |
| 8390dac0 AW |
1260 | ;; FIXME: this isn't right. |
| 1261 | (format:out-inf-nan number width digits edigits overch padch)) | |
| 1262 | (else | |
| 1263 | (format:parse-float number #t 0) | |
| 1264 | (format:fn-strip) | |
| 1265 | (let* ((ee (if edigits (+ edigits 2) 4)) ; for the following algorithm | |
| 1266 | (ww (if width (- width ee) #f)) ; see Steele's CL book p.395 | |
| 1267 | (n (if (= format:fn-dot 0) ; number less than (abs 1.0) ? | |
| 1268 | (- (format:fn-zlead)) | |
| 1269 | format:fn-dot)) | |
| 1270 | (d (if digits | |
| 1271 | digits | |
| 1272 | (max format:fn-len (min n 7)))) ; q = format:fn-len | |
| 1273 | (dd (- d n))) | |
| 1274 | (if (<= 0 dd d) | |
| 1275 | (begin | |
| 1276 | (format:out-fixed modifier number (list ww dd #f overch padch)) | |
| 1277 | (format:out-fill ee #\space)) ;~@T not implemented yet | |
| 1278 | (format:out-expon modifier number pars)))))))) | |
| 1279 | ||
| 1280 | ;; format dollar flonums (~$) | |
| 1281 | ||
| 1282 | (define (format:out-dollar modifier number pars) | |
| 1283 | (if (not (or (number? number) (string? number))) | |
| 1284 | (format:error "argument is not a number or a number string")) | |
| 1285 | ||
| 1286 | (let ((l (length pars))) | |
| 1287 | (let ((digits (format:par pars l 0 2 "digits")) | |
| 1288 | (mindig (format:par pars l 1 1 "mindig")) | |
| 1289 | (width (format:par pars l 2 0 "width")) | |
| 1290 | (padch (format:par pars l 3 format:space-ch #f))) | |
| 1291 | ||
| 1292 | (cond | |
| 6a07a061 MW |
1293 | ((and (number? number) |
| 1294 | (or (inf? number) (nan? number))) | |
| 8390dac0 AW |
1295 | (format:out-inf-nan number width digits #f #f padch)) |
| 1296 | ||
| 1297 | (else | |
| 1298 | (format:parse-float number #t 0) | |
| 1299 | (if (<= (- format:fn-len format:fn-dot) digits) | |
| 1300 | (format:fn-zfill #f (- digits (- format:fn-len format:fn-dot))) | |
| 1301 | (format:fn-round digits)) | |
| 1302 | (let ((numlen (+ format:fn-len 1))) | |
| 1303 | (if (or (not format:fn-pos?) (memq modifier '(at colon-at))) | |
| 1304 | (set! numlen (+ numlen 1))) | |
| 1305 | (if (and mindig (> mindig format:fn-dot)) | |
| 1306 | (set! numlen (+ numlen (- mindig format:fn-dot)))) | |
| 1307 | (if (and (= format:fn-dot 0) (not mindig)) | |
| 1308 | (set! numlen (+ numlen 1))) | |
| 1309 | (if (< numlen width) | |
| 1310 | (case modifier | |
| 1311 | ((colon) | |
| 1312 | (if (not format:fn-pos?) | |
| 1313 | (format:out-char #\-)) | |
| 1314 | (format:out-fill (- width numlen) (integer->char padch))) | |
| 1315 | ((at) | |
| 1316 | (format:out-fill (- width numlen) (integer->char padch)) | |
| 1317 | (format:out-char (if format:fn-pos? #\+ #\-))) | |
| 1318 | ((colon-at) | |
| 1319 | (format:out-char (if format:fn-pos? #\+ #\-)) | |
| 1320 | (format:out-fill (- width numlen) (integer->char padch))) | |
| 1321 | (else | |
| 1322 | (format:out-fill (- width numlen) (integer->char padch)) | |
| 1323 | (if (not format:fn-pos?) | |
| 1324 | (format:out-char #\-)))) | |
| 1325 | (if format:fn-pos? | |
| 1326 | (if (memq modifier '(at colon-at)) (format:out-char #\+)) | |
| 1327 | (format:out-char #\-)))) | |
| 29d096c8 | 1328 | (if (and mindig (> mindig format:fn-dot)) |
| 8390dac0 | 1329 | (format:out-fill (- mindig format:fn-dot) #\0)) |
| 29d096c8 | 1330 | (if (and (= format:fn-dot 0) (not mindig)) |
| 8390dac0 AW |
1331 | (format:out-char #\0)) |
| 1332 | (format:out-substr format:fn-str 0 format:fn-dot) | |
| 1333 | (format:out-char #\.) | |
| 1334 | (format:out-substr format:fn-str format:fn-dot format:fn-len)))))) | |
| 093d2ca9 MV |
1335 | |
| 1336 | ; the flonum buffers | |
| 1337 | ||
| 8390dac0 AW |
1338 | (define format:fn-max 400) ; max. number of number digits |
| 1339 | (define format:fn-str (make-string format:fn-max)) ; number buffer | |
| 1340 | (define format:fn-len 0) ; digit length of number | |
| 1341 | (define format:fn-dot #f) ; dot position of number | |
| 1342 | (define format:fn-pos? #t) ; number positive? | |
| 1343 | (define format:en-max 10) ; max. number of exponent digits | |
| 1344 | (define format:en-str (make-string format:en-max)) ; exponent buffer | |
| 1345 | (define format:en-len 0) ; digit length of exponent | |
| 1346 | (define format:en-pos? #t) ; exponent positive? | |
| 1347 | ||
| 1348 | (define (format:parse-float num fixed? scale) | |
| 1349 | (let ((num-str (if (string? num) | |
| 1350 | num | |
| 1351 | (number->string (exact->inexact num))))) | |
| 1352 | (set! format:fn-pos? #t) | |
| 1353 | (set! format:fn-len 0) | |
| 1354 | (set! format:fn-dot #f) | |
| 1355 | (set! format:en-pos? #t) | |
| 1356 | (set! format:en-len 0) | |
| 1357 | (do ((i 0 (+ i 1)) | |
| 1358 | (left-zeros 0) | |
| 1359 | (mantissa? #t) | |
| 1360 | (all-zeros? #t) | |
| 1361 | (num-len (string-length num-str)) | |
| 1362 | (c #f)) ; current exam. character in num-str | |
| 1363 | ((= i num-len) | |
| 1364 | (if (not format:fn-dot) | |
| 1365 | (set! format:fn-dot format:fn-len)) | |
| 1366 | ||
| 1367 | (if all-zeros? | |
| 1368 | (begin | |
| 1369 | (set! left-zeros 0) | |
| 1370 | (set! format:fn-dot 0) | |
| 1371 | (set! format:fn-len 1))) | |
| 1372 | ||
| 1373 | ;; now format the parsed values according to format's need | |
| 1374 | ||
| 1375 | (if fixed? | |
| 1376 | ||
| 1377 | (begin ; fixed format m.nnn or .nnn | |
| 1378 | (if (and (> left-zeros 0) (> format:fn-dot 0)) | |
| 1379 | (if (> format:fn-dot left-zeros) | |
| 1380 | (begin ; norm 0{0}nn.mm to nn.mm | |
| 1381 | (format:fn-shiftleft left-zeros) | |
| 1382 | (set! format:fn-dot (- format:fn-dot left-zeros)) | |
| 1383 | (set! left-zeros 0)) | |
| 1384 | (begin ; normalize 0{0}.nnn to .nnn | |
| 1385 | (format:fn-shiftleft format:fn-dot) | |
| 1386 | (set! left-zeros (- left-zeros format:fn-dot)) | |
| 1387 | (set! format:fn-dot 0)))) | |
| 1388 | (if (or (not (= scale 0)) (> format:en-len 0)) | |
| 1389 | (let ((shift (+ scale (format:en-int)))) | |
| 1390 | (cond | |
| 1391 | (all-zeros? #t) | |
| 1392 | ((> (+ format:fn-dot shift) format:fn-len) | |
| 1393 | (format:fn-zfill | |
| 1394 | #f (- shift (- format:fn-len format:fn-dot))) | |
| 1395 | (set! format:fn-dot format:fn-len)) | |
| 1396 | ((< (+ format:fn-dot shift) 0) | |
| 1397 | (format:fn-zfill #t (- (- shift) format:fn-dot)) | |
| 1398 | (set! format:fn-dot 0)) | |
| 1399 | (else | |
| 1400 | (if (> left-zeros 0) | |
| 1401 | (if (<= left-zeros shift) ; shift always > 0 here | |
| 1402 | (format:fn-shiftleft shift) ; shift out 0s | |
| 1403 | (begin | |
| 1404 | (format:fn-shiftleft left-zeros) | |
| 1405 | (set! format:fn-dot (- shift left-zeros)))) | |
| 1406 | (set! format:fn-dot (+ format:fn-dot shift)))))))) | |
| 1407 | ||
| 1408 | (let ((negexp ; expon format m.nnnEee | |
| 1409 | (if (> left-zeros 0) | |
| 1410 | (- left-zeros format:fn-dot -1) | |
| 1411 | (if (= format:fn-dot 0) 1 0)))) | |
| 1412 | (if (> left-zeros 0) | |
| 1413 | (begin ; normalize 0{0}.nnn to n.nn | |
| 1414 | (format:fn-shiftleft left-zeros) | |
| 1415 | (set! format:fn-dot 1)) | |
| 1416 | (if (= format:fn-dot 0) | |
| 1417 | (set! format:fn-dot 1))) | |
| 1418 | (format:en-set (- (+ (- format:fn-dot scale) (format:en-int)) | |
| 1419 | negexp)) | |
| 1420 | (cond | |
| 1421 | (all-zeros? | |
| 1422 | (format:en-set 0) | |
| 1423 | (set! format:fn-dot 1)) | |
| 1424 | ((< scale 0) ; leading zero | |
| 1425 | (format:fn-zfill #t (- scale)) | |
| 1426 | (set! format:fn-dot 0)) | |
| 1427 | ((> scale format:fn-dot) | |
| 1428 | (format:fn-zfill #f (- scale format:fn-dot)) | |
| 1429 | (set! format:fn-dot scale)) | |
| 1430 | (else | |
| 1431 | (set! format:fn-dot scale))))) | |
| 1432 | #t) | |
| 1433 | ||
| 1434 | ;; do body | |
| 1435 | (set! c (string-ref num-str i)) ; parse the output of number->string | |
| 1436 | (cond ; which can be any valid number | |
| 1437 | ((char-numeric? c) ; representation of R4RS except | |
| 1438 | (if mantissa? ; complex numbers | |
| 1439 | (begin | |
| 1440 | (if (char=? c #\0) | |
| 1441 | (if all-zeros? | |
| 1442 | (set! left-zeros (+ left-zeros 1))) | |
| 1443 | (begin | |
| 1444 | (set! all-zeros? #f))) | |
| 1445 | (string-set! format:fn-str format:fn-len c) | |
| 1446 | (set! format:fn-len (+ format:fn-len 1))) | |
| 1447 | (begin | |
| 1448 | (string-set! format:en-str format:en-len c) | |
| 1449 | (set! format:en-len (+ format:en-len 1))))) | |
| 1450 | ((or (char=? c #\-) (char=? c #\+)) | |
| 1451 | (if mantissa? | |
| 1452 | (set! format:fn-pos? (char=? c #\+)) | |
| 1453 | (set! format:en-pos? (char=? c #\+)))) | |
| 1454 | ((char=? c #\.) | |
| 1455 | (set! format:fn-dot format:fn-len)) | |
| 1456 | ((char=? c #\e) | |
| 1457 | (set! mantissa? #f)) | |
| 1458 | ((char=? c #\E) | |
| 1459 | (set! mantissa? #f)) | |
| 1460 | ((char-whitespace? c) #t) | |
| 1461 | ((char=? c #\d) #t) ; decimal radix prefix | |
| 1462 | ((char=? c #\#) #t) | |
| 1463 | (else | |
| 1464 | (format:error "illegal character `~c' in number->string" c)))))) | |
| 1465 | ||
| 1466 | (define (format:en-int) ; convert exponent string to integer | |
| 1467 | (if (= format:en-len 0) | |
| 1468 | 0 | |
| 1469 | (do ((i 0 (+ i 1)) | |
| 1470 | (n 0)) | |
| 1471 | ((= i format:en-len) | |
| 1472 | (if format:en-pos? | |
| 1473 | n | |
| 1474 | (- n))) | |
| 1475 | (set! n (+ (* n 10) (- (char->integer (string-ref format:en-str i)) | |
| 1476 | format:zero-ch)))))) | |
| 1477 | ||
| 1478 | (define (format:en-set en) ; set exponent string number | |
| 29d096c8 | 1479 | (set! format:en-len 0) |
| 8390dac0 AW |
1480 | (set! format:en-pos? (>= en 0)) |
| 1481 | (let ((en-str (number->string en))) | |
| 1482 | (do ((i 0 (+ i 1)) | |
| 1483 | (en-len (string-length en-str)) | |
| 1484 | (c #f)) | |
| 1485 | ((= i en-len)) | |
| 1486 | (set! c (string-ref en-str i)) | |
| 1487 | (if (char-numeric? c) | |
| 29d096c8 AW |
1488 | (begin |
| 1489 | (string-set! format:en-str format:en-len c) | |
| 8390dac0 AW |
1490 | (set! format:en-len (+ format:en-len 1))))))) |
| 1491 | ||
| 1492 | (define (format:fn-zfill left? n) ; fill current number string with 0s | |
| 1493 | (if (> (+ n format:fn-len) format:fn-max) ; from the left or right | |
| 1494 | (format:error "number is too long to format (enlarge format:fn-max)")) | |
| 1495 | (set! format:fn-len (+ format:fn-len n)) | |
| 1496 | (if left? | |
| 1497 | (do ((i format:fn-len (- i 1))) ; fill n 0s to left | |
| 1498 | ((< i 0)) | |
| 1499 | (string-set! format:fn-str i | |
| 1500 | (if (< i n) | |
| 1501 | #\0 | |
| 1502 | (string-ref format:fn-str (- i n))))) | |
| 1503 | (do ((i (- format:fn-len n) (+ i 1))) ; fill n 0s to the right | |
| 1504 | ((= i format:fn-len)) | |
| 1505 | (string-set! format:fn-str i #\0)))) | |
| 1506 | ||
| 1507 | (define (format:fn-shiftleft n) ; shift left current number n positions | |
| 1508 | (if (> n format:fn-len) | |
| 1509 | (format:error "internal error in format:fn-shiftleft (~d,~d)" | |
| 1510 | n format:fn-len)) | |
| 1511 | (do ((i n (+ i 1))) | |
| 1512 | ((= i format:fn-len) | |
| 1513 | (set! format:fn-len (- format:fn-len n))) | |
| 1514 | (string-set! format:fn-str (- i n) (string-ref format:fn-str i)))) | |
| 1515 | ||
| 1516 | (define (format:fn-round digits) ; round format:fn-str | |
| 1517 | (set! digits (+ digits format:fn-dot)) | |
| 1518 | (do ((i digits (- i 1)) ; "099",2 -> "10" | |
| 1519 | (c 5)) ; "023",2 -> "02" | |
| 1520 | ((or (= c 0) (< i 0)) ; "999",2 -> "100" | |
| 1521 | (if (= c 1) ; "005",2 -> "01" | |
| 1522 | (begin ; carry overflow | |
| 1523 | (set! format:fn-len digits) | |
| 1524 | (format:fn-zfill #t 1) ; add a 1 before fn-str | |
| 1525 | (string-set! format:fn-str 0 #\1) | |
| 1526 | (set! format:fn-dot (+ format:fn-dot 1))) | |
| 1527 | (set! format:fn-len digits))) | |
| 1528 | (set! c (+ (- (char->integer (string-ref format:fn-str i)) | |
| 1529 | format:zero-ch) c)) | |
| 1530 | (string-set! format:fn-str i (integer->char | |
| 1531 | (if (< c 10) | |
| 1532 | (+ c format:zero-ch) | |
| 1533 | (+ (- c 10) format:zero-ch)))) | |
| 1534 | (set! c (if (< c 10) 0 1)))) | |
| 1535 | ||
| 1536 | (define (format:fn-out modifier add-leading-zero?) | |
| 1537 | (if format:fn-pos? | |
| 1538 | (if (eq? modifier 'at) | |
| 1539 | (format:out-char #\+)) | |
| 1540 | (format:out-char #\-)) | |
| 1541 | (if (= format:fn-dot 0) | |
| 1542 | (if add-leading-zero? | |
| 1543 | (format:out-char #\0)) | |
| 1544 | (format:out-substr format:fn-str 0 format:fn-dot)) | |
| 1545 | (format:out-char #\.) | |
| 1546 | (format:out-substr format:fn-str format:fn-dot format:fn-len)) | |
| 1547 | ||
| 1548 | (define (format:en-out edigits expch) | |
| 1549 | (format:out-char (if expch (integer->char expch) #\E)) | |
| 1550 | (format:out-char (if format:en-pos? #\+ #\-)) | |
| 1551 | (if edigits | |
| 1552 | (if (< format:en-len edigits) | |
| 1553 | (format:out-fill (- edigits format:en-len) #\0))) | |
| 1554 | (format:out-substr format:en-str 0 format:en-len)) | |
| 1555 | ||
| 1556 | (define (format:fn-strip) ; strip trailing zeros but one | |
| 1557 | (string-set! format:fn-str format:fn-len #\0) | |
| 1558 | (do ((i format:fn-len (- i 1))) | |
| 1559 | ((or (not (char=? (string-ref format:fn-str i) #\0)) | |
| 1560 | (<= i format:fn-dot)) | |
| 1561 | (set! format:fn-len (+ i 1))))) | |
| 1562 | ||
| 1563 | (define (format:fn-zlead) ; count leading zeros | |
| 1564 | (do ((i 0 (+ i 1))) | |
| 1565 | ((or (= i format:fn-len) | |
| 1566 | (not (char=? (string-ref format:fn-str i) #\0))) | |
| 1567 | (if (= i format:fn-len) ; found a real zero | |
| 1568 | 0 | |
| 1569 | i)))) | |
| 7da43e41 | 1570 | |
| 7da43e41 | 1571 | |
| 093d2ca9 | 1572 | ;;; some global functions not found in SLIB |
| 7da43e41 | 1573 | |
| 8390dac0 AW |
1574 | (define (string-capitalize-first str) ; "hello" -> "Hello" |
| 1575 | (let ((cap-str (string-copy str)) ; "hELLO" -> "Hello" | |
| 1576 | (non-first-alpha #f) ; "*hello" -> "*Hello" | |
| 1577 | (str-len (string-length str))) ; "hello you" -> "Hello you" | |
| 1578 | (do ((i 0 (+ i 1))) | |
| 1579 | ((= i str-len) cap-str) | |
| 1580 | (let ((c (string-ref str i))) | |
| 1581 | (if (char-alphabetic? c) | |
| 1582 | (if non-first-alpha | |
| 1583 | (string-set! cap-str i (char-downcase c)) | |
| 1584 | (begin | |
| 1585 | (set! non-first-alpha #t) | |
| 1586 | (string-set! cap-str i (char-upcase c))))))))) | |
| 29d096c8 | 1587 | |
| 8390dac0 AW |
1588 | ;; Aborts the program when a formatting error occures. This is a null |
| 1589 | ;; argument closure to jump to the interpreters toplevel continuation. | |
| 29d096c8 | 1590 | |
| 8390dac0 | 1591 | (define (format:abort) (error "error in format")) |
| 093d2ca9 | 1592 | |
| 8390dac0 AW |
1593 | (let ((arg-pos (format:format-work format-string format-args)) |
| 1594 | (arg-len (length format-args))) | |
| 1595 | (cond | |
| 1596 | ((> arg-pos arg-len) | |
| 1597 | (set! format:arg-pos (+ arg-len 1)) | |
| 1598 | (display format:arg-pos) | |
| 1599 | (format:error "~a missing argument~:p" (- arg-pos arg-len))) | |
| 1600 | (else | |
| b90b4b2b | 1601 | (if flush-output? |
| 79f124ac | 1602 | (force-output port)) |
| 8390dac0 AW |
1603 | (if destination |
| 1604 | #t | |
| 79f124ac AW |
1605 | (let ((str (get-output-string port))) |
| 1606 | (close-port port) | |
| 8390dac0 | 1607 | str))))))) |
| 2ce77e6c AW |
1608 | |
| 1609 | (begin-deprecated | |
| 1610 | (set! format | |
| 1611 | (let ((format format)) | |
| 1612 | (case-lambda | |
| f02f8a61 AW |
1613 | ((destination format-string . args) |
| 1614 | (if (string? destination) | |
| 2ce77e6c AW |
1615 | (begin |
| 1616 | (issue-deprecation-warning | |
| f02f8a61 AW |
1617 | "Omitting the destination on a call to format is deprecated." |
| 1618 | "Pass #f as the destination, before the format string.") | |
| 1619 | (apply format #f destination format-string args)) | |
| 1620 | (apply format destination format-string args))) | |
| 2ce77e6c AW |
1621 | ((deprecated-format-string-only) |
| 1622 | (issue-deprecation-warning | |
| 1623 | "Omitting the destination port on a call to format is deprecated." | |
| 1624 | "Pass #f as the destination port, before the format string.") | |
| 1625 | (format #f deprecated-format-string-only)))))) | |
| 29d096c8 | 1626 | |
| d02655f7 | 1627 | |
| 14469b7c | 1628 | ;; Thanks to Shuji Narazaki |
| 296ff5e7 | 1629 | (module-set! the-root-module 'format format) |