HCoop / bpt / guile.git / blame
| Commit | Line | Data |
|---|---|---|
| 7da43e41 JB |
1 | ;;;; "format.scm" Common LISP text output formatter for SLIB |
| 2 | ;;; Written 1992-1994 by Dirk Lutzebaeck (lutzeb@cs.tu-berlin.de) | |
| 3 | ;;; Assimilated into Guile May 1999 | |
| 093d2ca9 MV |
4 | ;; |
| 5 | ;; This code is in the public domain. | |
| 7da43e41 | 6 | |
| 093d2ca9 MV |
7 | ;; Authors of the original version (< 1.4) were Ken Dickey and Aubrey Jaffer. |
| 8 | ;; Please send error reports to bug-guile@gnu.org. | |
| 9 | ;; For documentation see slib.texi and format.doc. | |
| 10 | ;; For testing load formatst.scm. | |
| 11 | ;; | |
| 12 | ;; Version 3.0 | |
| 7da43e41 | 13 | |
| b337528f | 14 | (define-module (ice-9 format) |
| 3cc34e16 | 15 | :use-module (ice-9 and-let-star) |
| b8596c08 | 16 | :autoload (ice-9 pretty-print) (pretty-print truncated-print) |
| f595ccfe MD |
17 | :replace (format) |
| 18 | :export (format:symbol-case-conv | |
| 19 | format:iobj-case-conv | |
| 20 | format:expch)) | |
| 7da43e41 JB |
21 | |
| 22 | ;;; Configuration ------------------------------------------------------------ | |
| 23 | ||
| 24 | (define format:symbol-case-conv #f) | |
| 25 | ;; Symbols are converted by symbol->string so the case of the printed | |
| 26 | ;; symbols is implementation dependent. format:symbol-case-conv is a | |
| 27 | ;; one arg closure which is either #f (no conversion), string-upcase!, | |
| 28 | ;; string-downcase! or string-capitalize!. | |
| 29 | ||
| 30 | (define format:iobj-case-conv #f) | |
| 31 | ;; As format:symbol-case-conv but applies for the representation of | |
| 32 | ;; implementation internal objects. | |
| 33 | ||
| 34 | (define format:expch #\E) | |
| 35 | ;; The character prefixing the exponent value in ~e printing. | |
| 36 | ||
| 37 | (define format:floats (provided? 'inexact)) | |
| 38 | ;; Detects if the scheme system implements flonums (see at eof). | |
| 39 | ||
| 40 | (define format:complex-numbers (provided? 'complex)) | |
| 41 | ;; Detects if the scheme system implements complex numbers. | |
| 42 | ||
| 43 | (define format:radix-pref (char=? #\# (string-ref (number->string 8 8) 0))) | |
| 44 | ;; Detects if number->string adds a radix prefix. | |
| 45 | ||
| 46 | (define format:ascii-non-printable-charnames | |
| 47 | '#("nul" "soh" "stx" "etx" "eot" "enq" "ack" "bel" | |
| 48 | "bs" "ht" "nl" "vt" "np" "cr" "so" "si" | |
| 49 | "dle" "dc1" "dc2" "dc3" "dc4" "nak" "syn" "etb" | |
| 50 | "can" "em" "sub" "esc" "fs" "gs" "rs" "us" "space")) | |
| 51 | ||
| 52 | ;;; End of configuration ---------------------------------------------------- | |
| 53 | ||
| 093d2ca9 MV |
54 | (define (format . args) |
| 55 | (letrec | |
| 56 | ((format:version "3.0") | |
| 57 | (format:port #f) ; curr. format output port | |
| 58 | (format:output-col 0) ; curr. format output tty column | |
| 59 | (format:flush-output #f) ; flush output at end of formatting | |
| 60 | (format:case-conversion #f) | |
| 61 | (format:args #f) | |
| 62 | (format:pos 0) ; curr. format string parsing position | |
| 63 | (format:arg-pos 0) ; curr. format argument position | |
| 7da43e41 | 64 | ; this is global for error presentation |
| 093d2ca9 MV |
65 | |
| 66 | ;; format string and char output routines on format:port | |
| 67 | ||
| 68 | (format:out-str | |
| 69 | (lambda (str) | |
| 70 | (if format:case-conversion | |
| 71 | (display (format:case-conversion str) format:port) | |
| 72 | (display str format:port)) | |
| 73 | (set! format:output-col | |
| 74 | (+ format:output-col (string-length str))))) | |
| 75 | ||
| 76 | (format:out-char | |
| 77 | (lambda (ch) | |
| 78 | (if format:case-conversion | |
| 79 | (display (format:case-conversion (string ch)) | |
| 80 | format:port) | |
| 81 | (write-char ch format:port)) | |
| 82 | (set! format:output-col | |
| 83 | (if (char=? ch #\newline) | |
| 84 | 0 | |
| 85 | (+ format:output-col 1))))) | |
| 86 | ||
| 87 | ;;(define (format:out-substr str i n) ; this allocates a new string | |
| 88 | ;; (display (substring str i n) format:port) | |
| 89 | ;; (set! format:output-col (+ format:output-col n))) | |
| 90 | ||
| 91 | (format:out-substr | |
| 92 | (lambda (str i n) | |
| 93 | (do ((k i (+ k 1))) | |
| 94 | ((= k n)) | |
| 95 | (write-char (string-ref str k) format:port)) | |
| 96 | (set! format:output-col (+ format:output-col (- n i))))) | |
| 97 | ||
| 98 | ;;(define (format:out-fill n ch) ; this allocates a new string | |
| 99 | ;; (format:out-str (make-string n ch))) | |
| 100 | ||
| 101 | (format:out-fill | |
| 102 | (lambda (n ch) | |
| 103 | (do ((i 0 (+ i 1))) | |
| 104 | ((= i n)) | |
| 105 | (write-char ch format:port)) | |
| 106 | (set! format:output-col (+ format:output-col n)))) | |
| 107 | ||
| 108 | ;; format's user error handler | |
| 109 | ||
| 110 | (format:error | |
| 111 | (lambda args ; never returns! | |
| 112 | (let ((format-args format:args) | |
| 113 | (port (current-error-port))) | |
| 114 | (set! format:error format:intern-error) | |
| 115 | (if (and (>= (length format:args) 2) | |
| 116 | (string? (cadr format:args))) | |
| 117 | (let ((format-string (cadr format-args))) | |
| 118 | (if (not (zero? format:arg-pos)) | |
| 119 | (set! format:arg-pos (- format:arg-pos 1))) | |
| 120 | (format port | |
| 121 | "~%FORMAT: error with call: (format ~a \"~a<===~a\" ~ | |
| 7da43e41 | 122 | ~{~a ~}===>~{~a ~})~% " |
| 093d2ca9 MV |
123 | (car format:args) |
| 124 | (substring format-string 0 format:pos) | |
| 125 | (substring format-string format:pos | |
| 126 | (string-length format-string)) | |
| 127 | (list-head (cddr format:args) format:arg-pos) | |
| 128 | (list-tail (cddr format:args) format:arg-pos))) | |
| 129 | (format port | |
| 130 | "~%FORMAT: error with call: (format~{ ~a~})~% " | |
| 131 | format:args)) | |
| 132 | (apply format port args) | |
| 133 | (newline port) | |
| 134 | (set! format:error format:error-save) | |
| 135 | (format:abort)))) | |
| 136 | ||
| 137 | (format:intern-error | |
| 138 | (lambda args | |
| 139 | ;;if something goes wrong in format:error | |
| 140 | (display "FORMAT: INTERNAL ERROR IN FORMAT:ERROR!") (newline) | |
| 141 | (display " format args: ") (write format:args) (newline) | |
| 142 | (display " error args: ") (write args) (newline) | |
| 143 | (set! format:error format:error-save) | |
| 144 | (format:abort))) | |
| 145 | ||
| 146 | (format:error-save #f) | |
| 147 | ||
| 148 | (format:format | |
| 149 | (lambda args ; the formatter entry | |
| 150 | (set! format:args args) | |
| 151 | (set! format:arg-pos 0) | |
| 152 | (set! format:pos 0) | |
| 153 | (if (< (length args) 1) | |
| 154 | (format:error "not enough arguments")) | |
| 155 | ||
| 156 | ;; If the first argument is a string, then that's the format string. | |
| 157 | ;; (Scheme->C) | |
| 158 | ;; In this case, put the argument list in canonical form. | |
| 159 | (let ((args (if (string? (car args)) | |
| 160 | (cons #f args) | |
| 161 | args))) | |
| 162 | ;; Use this canonicalized version when reporting errors. | |
| 163 | (set! format:args args) | |
| 164 | ||
| 165 | (let ((destination (car args)) | |
| 166 | (arglist (cdr args))) | |
| 167 | (cond | |
| 168 | ((or (and (boolean? destination) ; port output | |
| 169 | destination) | |
| 170 | (output-port? destination) | |
| 171 | (number? destination)) | |
| 172 | (format:out (cond | |
| 173 | ((boolean? destination) (current-output-port)) | |
| 174 | ((output-port? destination) destination) | |
| 175 | ((number? destination) (current-error-port))) | |
| 176 | (car arglist) (cdr arglist))) | |
| 177 | ((and (boolean? destination) ; string output | |
| 178 | (not destination)) | |
| 179 | (call-with-output-string | |
| 180 | (lambda (port) (format:out port (car arglist) (cdr arglist))))) | |
| 181 | (else | |
| 182 | (format:error "illegal destination `~a'" destination))))))) | |
| 183 | ||
| 184 | (format:out ; the output handler for a port | |
| 185 | (lambda (port fmt args) | |
| 186 | (set! format:port port) ; global port for | |
| 187 | ; output routines | |
| 188 | (set! format:case-conversion #f) ; modifier case | |
| 189 | ; conversion procedure | |
| 190 | (set! format:flush-output #f) ; ~! reset | |
| 191 | (and-let* ((col (port-column port))) ; get current column from port | |
| 192 | (set! format:output-col col)) | |
| 193 | (let ((arg-pos (format:format-work fmt args)) | |
| 194 | (arg-len (length args))) | |
| 195 | (cond | |
| 093d2ca9 MV |
196 | ((> arg-pos arg-len) |
| 197 | (set! format:arg-pos (+ arg-len 1)) | |
| 198 | (display format:arg-pos) | |
| 199 | (format:error "~a missing argument~:p" (- arg-pos arg-len))) | |
| 200 | (else | |
| 201 | (if format:flush-output (force-output port)) | |
| 202 | #t))))) | |
| 203 | ||
| 204 | (format:parameter-characters | |
| 205 | '(#\0 #\1 #\2 #\3 #\4 #\5 #\6 #\7 #\8 #\9 #\- #\+ #\v #\# #\')) | |
| 206 | ||
| 207 | (format:format-work ; does the formatting work | |
| 208 | (lambda (format-string arglist) | |
| 209 | (letrec | |
| 210 | ((format-string-len (string-length format-string)) | |
| 211 | (arg-pos 0) ; argument position in arglist | |
| 212 | (arg-len (length arglist)) ; number of arguments | |
| 213 | (modifier #f) ; 'colon | 'at | 'colon-at | #f | |
| 214 | (params '()) ; directive parameter list | |
| 215 | (param-value-found #f) ; a directive | |
| 216 | ; parameter value | |
| 217 | ; found | |
| 218 | (conditional-nest 0) ; conditional nesting level | |
| 219 | (clause-pos 0) ; last cond. clause | |
| 220 | ; beginning char pos | |
| 221 | (clause-default #f) ; conditional default | |
| 222 | ; clause string | |
| 223 | (clauses '()) ; conditional clause | |
| 224 | ; string list | |
| 225 | (conditional-type #f) ; reflects the | |
| 226 | ; contional modifiers | |
| 227 | (conditional-arg #f) ; argument to apply the conditional | |
| 228 | (iteration-nest 0) ; iteration nesting level | |
| 229 | (iteration-pos 0) ; iteration string | |
| 230 | ; beginning char pos | |
| 231 | (iteration-type #f) ; reflects the | |
| 232 | ; iteration modifiers | |
| 233 | (max-iterations #f) ; maximum number of | |
| 234 | ; iterations | |
| 235 | (recursive-pos-save format:pos) | |
| 236 | ||
| 237 | (next-char ; gets the next char | |
| 238 | ; from format-string | |
| 239 | (lambda () | |
| 240 | (let ((ch (peek-next-char))) | |
| 241 | (set! format:pos (+ 1 format:pos)) | |
| 242 | ch))) | |
| 243 | ||
| 244 | (peek-next-char | |
| 245 | (lambda () | |
| 246 | (if (>= format:pos format-string-len) | |
| 247 | (format:error "illegal format string") | |
| 248 | (string-ref format-string format:pos)))) | |
| 249 | ||
| 250 | (one-positive-integer? | |
| 251 | (lambda (params) | |
| 252 | (cond | |
| 253 | ((null? params) #f) | |
| 254 | ((and (integer? (car params)) | |
| 255 | (>= (car params) 0) | |
| 256 | (= (length params) 1)) #t) | |
| 257 | (else | |
| 258 | (format:error | |
| 259 | "one positive integer parameter expected"))))) | |
| 260 | ||
| 261 | (next-arg | |
| 262 | (lambda () | |
| 263 | (if (>= arg-pos arg-len) | |
| 264 | (begin | |
| 265 | (set! format:arg-pos (+ arg-len 1)) | |
| 266 | (format:error "missing argument(s)"))) | |
| 267 | (add-arg-pos 1) | |
| 268 | (list-ref arglist (- arg-pos 1)))) | |
| 269 | ||
| 270 | (prev-arg | |
| 271 | (lambda () | |
| 272 | (add-arg-pos -1) | |
| 273 | (if (negative? arg-pos) | |
| 274 | (format:error "missing backward argument(s)")) | |
| 275 | (list-ref arglist arg-pos))) | |
| 276 | ||
| 277 | (rest-args | |
| 278 | (lambda () | |
| 279 | (let loop ((l arglist) (k arg-pos)) ; list-tail definition | |
| 280 | (if (= k 0) l (loop (cdr l) (- k 1)))))) | |
| 281 | ||
| 282 | (add-arg-pos | |
| 283 | (lambda (n) | |
| 284 | (set! arg-pos (+ n arg-pos)) | |
| 285 | (set! format:arg-pos arg-pos))) | |
| 286 | ||
| 287 | (anychar-dispatch ; dispatches the format-string | |
| 288 | (lambda () | |
| 289 | (if (>= format:pos format-string-len) | |
| 290 | arg-pos ; used for ~? continuance | |
| 291 | (let ((char (next-char))) | |
| 292 | (cond | |
| 293 | ((char=? char #\~) | |
| 294 | (set! modifier #f) | |
| 295 | (set! params '()) | |
| 296 | (set! param-value-found #f) | |
| 297 | (tilde-dispatch)) | |
| 298 | (else | |
| 299 | (if (and (zero? conditional-nest) | |
| 300 | (zero? iteration-nest)) | |
| 301 | (format:out-char char)) | |
| 302 | (anychar-dispatch))))))) | |
| 303 | ||
| 304 | (tilde-dispatch | |
| 305 | (lambda () | |
| 306 | (cond | |
| 307 | ((>= format:pos format-string-len) | |
| 308 | (format:out-str "~") ; tilde at end of | |
| 309 | ; string is just | |
| 310 | ; output | |
| 311 | arg-pos) ; used for ~? | |
| 312 | ; continuance | |
| 313 | ((and (or (zero? conditional-nest) | |
| 314 | (memv (peek-next-char) ; find conditional | |
| 315 | ; directives | |
| 316 | (append '(#\[ #\] #\; #\: #\@ #\^) | |
| 317 | format:parameter-characters))) | |
| 318 | (or (zero? iteration-nest) | |
| 319 | (memv (peek-next-char) ; find iteration | |
| 320 | ; directives | |
| 321 | (append '(#\{ #\} #\: #\@ #\^) | |
| 322 | format:parameter-characters)))) | |
| 323 | (case (char-upcase (next-char)) | |
| 324 | ||
| 325 | ;; format directives | |
| 326 | ||
| 327 | ((#\A) ; Any -- for humans | |
| 328 | (set! format:read-proof | |
| 329 | (memq modifier '(colon colon-at))) | |
| 330 | (format:out-obj-padded (memq modifier '(at colon-at)) | |
| 331 | (next-arg) #f params) | |
| 332 | (anychar-dispatch)) | |
| 333 | ((#\S) ; Slashified -- for parsers | |
| a6b3219e MV |
334 | (set! format:read-proof |
| 335 | (memq modifier '(colon colon-at))) | |
| 093d2ca9 MV |
336 | (format:out-obj-padded (memq modifier '(at colon-at)) |
| 337 | (next-arg) #t params) | |
| 338 | (anychar-dispatch)) | |
| 339 | ((#\D) ; Decimal | |
| 340 | (format:out-num-padded modifier (next-arg) params 10) | |
| 341 | (anychar-dispatch)) | |
| 342 | ((#\X) ; Hexadecimal | |
| 343 | (format:out-num-padded modifier (next-arg) params 16) | |
| 344 | (anychar-dispatch)) | |
| 345 | ((#\O) ; Octal | |
| 346 | (format:out-num-padded modifier (next-arg) params 8) | |
| 347 | (anychar-dispatch)) | |
| 348 | ((#\B) ; Binary | |
| 349 | (format:out-num-padded modifier (next-arg) params 2) | |
| 350 | (anychar-dispatch)) | |
| 351 | ((#\R) | |
| 352 | (if (null? params) | |
| 353 | (format:out-obj-padded ; Roman, cardinal, | |
| 354 | ; ordinal numerals | |
| 355 | #f | |
| 356 | ((case modifier | |
| 357 | ((at) format:num->roman) | |
| 358 | ((colon-at) format:num->old-roman) | |
| 359 | ((colon) format:num->ordinal) | |
| 360 | (else format:num->cardinal)) | |
| 361 | (next-arg)) | |
| 362 | #f params) | |
| 363 | (format:out-num-padded ; any Radix | |
| 364 | modifier (next-arg) (cdr params) (car params))) | |
| 365 | (anychar-dispatch)) | |
| 366 | ((#\F) ; Fixed-format floating-point | |
| 367 | (if format:floats | |
| 368 | (format:out-fixed modifier (next-arg) params) | |
| 369 | (format:out-str (number->string (next-arg)))) | |
| 370 | (anychar-dispatch)) | |
| 371 | ((#\E) ; Exponential floating-point | |
| 372 | (if format:floats | |
| 373 | (format:out-expon modifier (next-arg) params) | |
| 374 | (format:out-str (number->string (next-arg)))) | |
| 375 | (anychar-dispatch)) | |
| 376 | ((#\G) ; General floating-point | |
| 377 | (if format:floats | |
| 378 | (format:out-general modifier (next-arg) params) | |
| 379 | (format:out-str (number->string (next-arg)))) | |
| 380 | (anychar-dispatch)) | |
| 381 | ((#\$) ; Dollars floating-point | |
| 382 | (if format:floats | |
| 383 | (format:out-dollar modifier (next-arg) params) | |
| 384 | (format:out-str (number->string (next-arg)))) | |
| 385 | (anychar-dispatch)) | |
| 386 | ((#\I) ; Complex numbers | |
| 387 | (if (not format:complex-numbers) | |
| 388 | (format:error | |
| 389 | "complex numbers not supported by this scheme system")) | |
| 390 | (let ((z (next-arg))) | |
| 391 | (if (not (complex? z)) | |
| 392 | (format:error "argument not a complex number")) | |
| 393 | (format:out-fixed modifier (real-part z) params) | |
| 394 | (format:out-fixed 'at (imag-part z) params) | |
| 395 | (format:out-char #\i)) | |
| 396 | (anychar-dispatch)) | |
| 397 | ((#\C) ; Character | |
| 398 | (let ((ch (if (one-positive-integer? params) | |
| 399 | (integer->char (car params)) | |
| 400 | (next-arg)))) | |
| 401 | (if (not (char? ch)) | |
| 402 | (format:error "~~c expects a character")) | |
| 403 | (case modifier | |
| 404 | ((at) | |
| 405 | (format:out-str (format:char->str ch))) | |
| 406 | ((colon) | |
| 407 | (let ((c (char->integer ch))) | |
| 408 | (if (< c 0) | |
| 409 | (set! c (+ c 256))) ; compensate | |
| 410 | ; complement | |
| 411 | ; impl. | |
| 412 | (cond | |
| 413 | ((< c #x20) ; assumes that control | |
| 414 | ; chars are < #x20 | |
| 415 | (format:out-char #\^) | |
| 416 | (format:out-char | |
| 417 | (integer->char (+ c #x40)))) | |
| 418 | ((>= c #x7f) | |
| 419 | (format:out-str "#\\") | |
| 420 | (format:out-str | |
| 421 | (if format:radix-pref | |
| 422 | (let ((s (number->string c 8))) | |
| 423 | (substring s 2 (string-length s))) | |
| 424 | (number->string c 8)))) | |
| 425 | (else | |
| 426 | (format:out-char ch))))) | |
| 427 | (else (format:out-char ch)))) | |
| 428 | (anychar-dispatch)) | |
| 429 | ((#\P) ; Plural | |
| 430 | (if (memq modifier '(colon colon-at)) | |
| 431 | (prev-arg)) | |
| 432 | (let ((arg (next-arg))) | |
| 433 | (if (not (number? arg)) | |
| 434 | (format:error "~~p expects a number argument")) | |
| 435 | (if (= arg 1) | |
| 436 | (if (memq modifier '(at colon-at)) | |
| 437 | (format:out-char #\y)) | |
| 438 | (if (memq modifier '(at colon-at)) | |
| 439 | (format:out-str "ies") | |
| 440 | (format:out-char #\s)))) | |
| 441 | (anychar-dispatch)) | |
| 442 | ((#\~) ; Tilde | |
| 443 | (if (one-positive-integer? params) | |
| 444 | (format:out-fill (car params) #\~) | |
| 445 | (format:out-char #\~)) | |
| 446 | (anychar-dispatch)) | |
| 447 | ((#\%) ; Newline | |
| 448 | (if (one-positive-integer? params) | |
| 449 | (format:out-fill (car params) #\newline) | |
| 450 | (format:out-char #\newline)) | |
| 451 | (set! format:output-col 0) | |
| 452 | (anychar-dispatch)) | |
| 453 | ((#\&) ; Fresh line | |
| 7da43e41 | 454 | (if (one-positive-integer? params) |
| 093d2ca9 MV |
455 | (begin |
| 456 | (if (> (car params) 0) | |
| 457 | (format:out-fill (- (car params) | |
| 458 | (if (> | |
| 459 | format:output-col | |
| 460 | 0) 0 1)) | |
| 461 | #\newline)) | |
| 462 | (set! format:output-col 0)) | |
| 463 | (if (> format:output-col 0) | |
| 464 | (format:out-char #\newline))) | |
| 465 | (anychar-dispatch)) | |
| 466 | ((#\_) ; Space character | |
| 467 | (if (one-positive-integer? params) | |
| 468 | (format:out-fill (car params) #\space) | |
| 469 | (format:out-char #\space)) | |
| 470 | (anychar-dispatch)) | |
| 471 | ((#\/) ; Tabulator character | |
| 472 | (if (one-positive-integer? params) | |
| 473 | (format:out-fill (car params) #\tab) | |
| 474 | (format:out-char #\tab)) | |
| 475 | (anychar-dispatch)) | |
| 476 | ((#\|) ; Page seperator | |
| 477 | (if (one-positive-integer? params) | |
| 478 | (format:out-fill (car params) #\page) | |
| 479 | (format:out-char #\page)) | |
| 480 | (set! format:output-col 0) | |
| 481 | (anychar-dispatch)) | |
| 482 | ((#\T) ; Tabulate | |
| 483 | (format:tabulate modifier params) | |
| 484 | (anychar-dispatch)) | |
| b8596c08 AW |
485 | ((#\Y) ; Structured print |
| 486 | (let ((width (if (one-positive-integer? params) | |
| 487 | (car params) | |
| 488 | 79))) | |
| 489 | (case modifier | |
| b8596c08 AW |
490 | ((at) |
| 491 | (format:out-str | |
| 492 | (with-output-to-string | |
| 493 | (lambda () | |
| 9274c3dd AW |
494 | (truncated-print (next-arg) |
| 495 | #:width width))))) | |
| 496 | ((colon-at) | |
| 497 | (format:out-str | |
| 498 | (with-output-to-string | |
| 499 | (lambda () | |
| 500 | (truncated-print (next-arg) | |
| 501 | #:width | |
| 502 | (max (- width | |
| 503 | format:output-col) | |
| 504 | 1)))))) | |
| 505 | ((colon) | |
| 506 | (format:error "illegal modifier in ~~?")) | |
| b8596c08 AW |
507 | (else |
| 508 | (pretty-print (next-arg) format:port | |
| 509 | #:width width) | |
| 510 | (set! format:output-col 0)))) | |
| 511 | (anychar-dispatch)) | |
| 093d2ca9 MV |
512 | ((#\? #\K) ; Indirection (is "~K" in T-Scheme) |
| 513 | (cond | |
| 514 | ((memq modifier '(colon colon-at)) | |
| 515 | (format:error "illegal modifier in ~~?")) | |
| 516 | ((eq? modifier 'at) | |
| 517 | (let* ((frmt (next-arg)) | |
| 518 | (args (rest-args))) | |
| 519 | (add-arg-pos (format:format-work frmt args)))) | |
| 520 | (else | |
| 521 | (let* ((frmt (next-arg)) | |
| 522 | (args (next-arg))) | |
| 523 | (format:format-work frmt args)))) | |
| 524 | (anychar-dispatch)) | |
| 525 | ((#\!) ; Flush output | |
| 526 | (set! format:flush-output #t) | |
| 527 | (anychar-dispatch)) | |
| 528 | ((#\newline) ; Continuation lines | |
| 529 | (if (eq? modifier 'at) | |
| 530 | (format:out-char #\newline)) | |
| 531 | (if (< format:pos format-string-len) | |
| 532 | (do ((ch (peek-next-char) (peek-next-char))) | |
| 533 | ((or (not (char-whitespace? ch)) | |
| 534 | (= format:pos (- format-string-len 1)))) | |
| 535 | (if (eq? modifier 'colon) | |
| 536 | (format:out-char (next-char)) | |
| 537 | (next-char)))) | |
| 538 | (anychar-dispatch)) | |
| 539 | ((#\*) ; Argument jumping | |
| 7da43e41 | 540 | (case modifier |
| 093d2ca9 MV |
541 | ((colon) ; jump backwards |
| 542 | (if (one-positive-integer? params) | |
| 543 | (do ((i 0 (+ i 1))) | |
| 544 | ((= i (car params))) | |
| 545 | (prev-arg)) | |
| 546 | (prev-arg))) | |
| 547 | ((at) ; jump absolute | |
| 548 | (set! arg-pos (if (one-positive-integer? params) | |
| 549 | (car params) 0))) | |
| 550 | ((colon-at) | |
| 551 | (format:error "illegal modifier `:@' in ~~* directive")) | |
| 552 | (else ; jump forward | |
| 553 | (if (one-positive-integer? params) | |
| 554 | (do ((i 0 (+ i 1))) | |
| 555 | ((= i (car params))) | |
| 556 | (next-arg)) | |
| 557 | (next-arg)))) | |
| 558 | (anychar-dispatch)) | |
| 559 | ((#\() ; Case conversion begin | |
| 560 | (set! format:case-conversion | |
| 561 | (case modifier | |
| 562 | ((at) string-capitalize-first) | |
| 563 | ((colon) string-capitalize) | |
| 564 | ((colon-at) string-upcase) | |
| 565 | (else string-downcase))) | |
| 566 | (anychar-dispatch)) | |
| 567 | ((#\)) ; Case conversion end | |
| 568 | (if (not format:case-conversion) | |
| 569 | (format:error "missing ~~(")) | |
| 570 | (set! format:case-conversion #f) | |
| 571 | (anychar-dispatch)) | |
| 572 | ((#\[) ; Conditional begin | |
| 573 | (set! conditional-nest (+ conditional-nest 1)) | |
| 7da43e41 | 574 | (cond |
| 093d2ca9 MV |
575 | ((= conditional-nest 1) |
| 576 | (set! clause-pos format:pos) | |
| 577 | (set! clause-default #f) | |
| 578 | (set! clauses '()) | |
| 579 | (set! conditional-type | |
| 580 | (case modifier | |
| 581 | ((at) 'if-then) | |
| 582 | ((colon) 'if-else-then) | |
| 583 | ((colon-at) (format:error "illegal modifier in ~~[")) | |
| 584 | (else 'num-case))) | |
| 585 | (set! conditional-arg | |
| 586 | (if (one-positive-integer? params) | |
| 587 | (car params) | |
| 588 | (next-arg))))) | |
| 589 | (anychar-dispatch)) | |
| 590 | ((#\;) ; Conditional separator | |
| 591 | (if (zero? conditional-nest) | |
| 592 | (format:error "~~; not in ~~[~~] conditional")) | |
| 593 | (if (not (null? params)) | |
| 594 | (format:error "no parameter allowed in ~~;")) | |
| 595 | (if (= conditional-nest 1) | |
| 596 | (let ((clause-str | |
| 597 | (cond | |
| 598 | ((eq? modifier 'colon) | |
| 599 | (set! clause-default #t) | |
| 600 | (substring format-string clause-pos | |
| 601 | (- format:pos 3))) | |
| 602 | ((memq modifier '(at colon-at)) | |
| 603 | (format:error "illegal modifier in ~~;")) | |
| 604 | (else | |
| 605 | (substring format-string clause-pos | |
| 606 | (- format:pos 2)))))) | |
| 607 | (set! clauses (append clauses (list clause-str))) | |
| 608 | (set! clause-pos format:pos))) | |
| 609 | (anychar-dispatch)) | |
| 610 | ((#\]) ; Conditional end | |
| 611 | (if (zero? conditional-nest) (format:error "missing ~~[")) | |
| 612 | (set! conditional-nest (- conditional-nest 1)) | |
| 613 | (if modifier | |
| 614 | (format:error "no modifier allowed in ~~]")) | |
| 615 | (if (not (null? params)) | |
| 616 | (format:error "no parameter allowed in ~~]")) | |
| 617 | (cond | |
| 618 | ((zero? conditional-nest) | |
| 619 | (let ((clause-str (substring format-string clause-pos | |
| 620 | (- format:pos 2)))) | |
| 621 | (if clause-default | |
| 622 | (set! clause-default clause-str) | |
| 623 | (set! clauses (append clauses (list clause-str))))) | |
| 624 | (case conditional-type | |
| 625 | ((if-then) | |
| 626 | (if conditional-arg | |
| 627 | (format:format-work (car clauses) | |
| 628 | (list conditional-arg)))) | |
| 629 | ((if-else-then) | |
| 630 | (add-arg-pos | |
| 631 | (format:format-work (if conditional-arg | |
| 632 | (cadr clauses) | |
| 633 | (car clauses)) | |
| 634 | (rest-args)))) | |
| 635 | ((num-case) | |
| 636 | (if (or (not (integer? conditional-arg)) | |
| 637 | (< conditional-arg 0)) | |
| 638 | (format:error "argument not a positive integer")) | |
| 639 | (if (not (and (>= conditional-arg (length clauses)) | |
| 640 | (not clause-default))) | |
| 641 | (add-arg-pos | |
| 642 | (format:format-work | |
| 643 | (if (>= conditional-arg (length clauses)) | |
| 644 | clause-default | |
| 645 | (list-ref clauses conditional-arg)) | |
| 646 | (rest-args)))))))) | |
| 647 | (anychar-dispatch)) | |
| 648 | ((#\{) ; Iteration begin | |
| 649 | (set! iteration-nest (+ iteration-nest 1)) | |
| 650 | (cond | |
| 651 | ((= iteration-nest 1) | |
| 652 | (set! iteration-pos format:pos) | |
| 653 | (set! iteration-type | |
| 654 | (case modifier | |
| 655 | ((at) 'rest-args) | |
| 656 | ((colon) 'sublists) | |
| 657 | ((colon-at) 'rest-sublists) | |
| 658 | (else 'list))) | |
| 659 | (set! max-iterations (if (one-positive-integer? params) | |
| 660 | (car params) #f)))) | |
| 661 | (anychar-dispatch)) | |
| 662 | ((#\}) ; Iteration end | |
| 663 | (if (zero? iteration-nest) (format:error "missing ~~{")) | |
| 664 | (set! iteration-nest (- iteration-nest 1)) | |
| 665 | (case modifier | |
| 666 | ((colon) | |
| 667 | (if (not max-iterations) (set! max-iterations 1))) | |
| a0dbcd9c | 668 | ((colon-at at) (format:error "illegal modifier"))) |
| 093d2ca9 MV |
669 | (if (not (null? params)) |
| 670 | (format:error "no parameters allowed in ~~}")) | |
| 671 | (if (zero? iteration-nest) | |
| 672 | (let ((iteration-str | |
| 673 | (substring format-string iteration-pos | |
| 674 | (- format:pos (if modifier 3 2))))) | |
| 675 | (if (string=? iteration-str "") | |
| 676 | (set! iteration-str (next-arg))) | |
| 677 | (case iteration-type | |
| 678 | ((list) | |
| 679 | (let ((args (next-arg)) | |
| 680 | (args-len 0)) | |
| 681 | (if (not (list? args)) | |
| 682 | (format:error "expected a list argument")) | |
| 683 | (set! args-len (length args)) | |
| 684 | (do ((arg-pos 0 (+ arg-pos | |
| 685 | (format:format-work | |
| 686 | iteration-str | |
| 687 | (list-tail args arg-pos)))) | |
| 688 | (i 0 (+ i 1))) | |
| 689 | ((or (>= arg-pos args-len) | |
| a0dbcd9c KR |
690 | (and max-iterations |
| 691 | (>= i max-iterations))))))) | |
| 093d2ca9 MV |
692 | ((sublists) |
| 693 | (let ((args (next-arg)) | |
| 694 | (args-len 0)) | |
| 695 | (if (not (list? args)) | |
| 696 | (format:error "expected a list argument")) | |
| 697 | (set! args-len (length args)) | |
| 698 | (do ((arg-pos 0 (+ arg-pos 1))) | |
| 699 | ((or (>= arg-pos args-len) | |
| a0dbcd9c KR |
700 | (and max-iterations |
| 701 | (>= arg-pos max-iterations)))) | |
| 093d2ca9 MV |
702 | (let ((sublist (list-ref args arg-pos))) |
| 703 | (if (not (list? sublist)) | |
| 704 | (format:error | |
| 705 | "expected a list of lists argument")) | |
| 706 | (format:format-work iteration-str sublist))))) | |
| 707 | ((rest-args) | |
| 708 | (let* ((args (rest-args)) | |
| 709 | (args-len (length args)) | |
| 710 | (usedup-args | |
| 711 | (do ((arg-pos 0 (+ arg-pos | |
| 712 | (format:format-work | |
| 713 | iteration-str | |
| 714 | (list-tail | |
| 715 | args arg-pos)))) | |
| 716 | (i 0 (+ i 1))) | |
| 717 | ((or (>= arg-pos args-len) | |
| a0dbcd9c KR |
718 | (and max-iterations |
| 719 | (>= i max-iterations))) | |
| 093d2ca9 MV |
720 | arg-pos)))) |
| 721 | (add-arg-pos usedup-args))) | |
| 722 | ((rest-sublists) | |
| 723 | (let* ((args (rest-args)) | |
| 724 | (args-len (length args)) | |
| 725 | (usedup-args | |
| 726 | (do ((arg-pos 0 (+ arg-pos 1))) | |
| 727 | ((or (>= arg-pos args-len) | |
| a0dbcd9c KR |
728 | (and max-iterations |
| 729 | (>= arg-pos max-iterations))) | |
| 093d2ca9 MV |
730 | arg-pos) |
| 731 | (let ((sublist (list-ref args arg-pos))) | |
| 732 | (if (not (list? sublist)) | |
| 733 | (format:error "expected list arguments")) | |
| 734 | (format:format-work iteration-str sublist))))) | |
| 735 | (add-arg-pos usedup-args))) | |
| 736 | (else (format:error "internal error in ~~}"))))) | |
| 737 | (anychar-dispatch)) | |
| 738 | ((#\^) ; Up and out | |
| 739 | (let* ((continue | |
| 740 | (cond | |
| 741 | ((not (null? params)) | |
| 742 | (not | |
| 743 | (case (length params) | |
| 744 | ((1) (zero? (car params))) | |
| 745 | ((2) (= (list-ref params 0) (list-ref params 1))) | |
| 746 | ((3) (<= (list-ref params 0) | |
| 747 | (list-ref params 1) | |
| 748 | (list-ref params 2))) | |
| 749 | (else (format:error "too much parameters"))))) | |
| 750 | (format:case-conversion ; if conversion stop conversion | |
| 751 | (set! format:case-conversion string-copy) #t) | |
| 752 | ((= iteration-nest 1) #t) | |
| 753 | ((= conditional-nest 1) #t) | |
| 754 | ((>= arg-pos arg-len) | |
| 755 | (set! format:pos format-string-len) #f) | |
| 756 | (else #t)))) | |
| 757 | (if continue | |
| 758 | (anychar-dispatch)))) | |
| 759 | ||
| 760 | ;; format directive modifiers and parameters | |
| 761 | ||
| 762 | ((#\@) ; `@' modifier | |
| 763 | (if (memq modifier '(at colon-at)) | |
| 764 | (format:error "double `@' modifier")) | |
| 765 | (set! modifier (if (eq? modifier 'colon) 'colon-at 'at)) | |
| 766 | (tilde-dispatch)) | |
| 767 | ((#\:) ; `:' modifier | |
| 768 | (if (memq modifier '(colon colon-at)) | |
| 769 | (format:error "double `:' modifier")) | |
| 770 | (set! modifier (if (eq? modifier 'at) 'colon-at 'colon)) | |
| 771 | (tilde-dispatch)) | |
| 772 | ((#\') ; Character parameter | |
| 773 | (if modifier (format:error "misplaced modifier")) | |
| 774 | (set! params (append params (list (char->integer (next-char))))) | |
| 775 | (set! param-value-found #t) | |
| 776 | (tilde-dispatch)) | |
| 777 | ((#\0 #\1 #\2 #\3 #\4 #\5 #\6 #\7 #\8 #\9 #\- #\+) ; num. paramtr | |
| 778 | (if modifier (format:error "misplaced modifier")) | |
| 779 | (let ((num-str-beg (- format:pos 1)) | |
| 780 | (num-str-end format:pos)) | |
| 781 | (do ((ch (peek-next-char) (peek-next-char))) | |
| 782 | ((not (char-numeric? ch))) | |
| 783 | (next-char) | |
| 784 | (set! num-str-end (+ 1 num-str-end))) | |
| 785 | (set! params | |
| 786 | (append params | |
| 787 | (list (string->number | |
| 788 | (substring format-string | |
| 789 | num-str-beg | |
| 790 | num-str-end)))))) | |
| 791 | (set! param-value-found #t) | |
| 792 | (tilde-dispatch)) | |
| 793 | ((#\V) ; Variable parameter from next argum. | |
| 794 | (if modifier (format:error "misplaced modifier")) | |
| 795 | (set! params (append params (list (next-arg)))) | |
| 796 | (set! param-value-found #t) | |
| 797 | (tilde-dispatch)) | |
| 798 | ((#\#) ; Parameter is number of remaining args | |
| 799 | (if param-value-found (format:error "misplaced '#'")) | |
| 800 | (if modifier (format:error "misplaced modifier")) | |
| 801 | (set! params (append params (list (length (rest-args))))) | |
| 802 | (set! param-value-found #t) | |
| 803 | (tilde-dispatch)) | |
| 804 | ((#\,) ; Parameter separators | |
| 805 | (if modifier (format:error "misplaced modifier")) | |
| 806 | (if (not param-value-found) | |
| 807 | (set! params (append params '(#f)))) ; append empty paramtr | |
| 808 | (set! param-value-found #f) | |
| 809 | (tilde-dispatch)) | |
| 810 | ((#\Q) ; Inquiry messages | |
| 811 | (if (eq? modifier 'colon) | |
| 812 | (format:out-str format:version) | |
| 813 | (let ((nl (string #\newline))) | |
| 814 | (format:out-str | |
| 815 | (string-append | |
| 816 | "SLIB Common LISP format version " format:version nl | |
| 817 | " (C) copyright 1992-1994 by Dirk Lutzebaeck" nl | |
| 818 | " please send bug reports to `lutzeb@cs.tu-berlin.de'" | |
| 819 | nl)))) | |
| 820 | (anychar-dispatch)) | |
| 821 | (else ; Unknown tilde directive | |
| 822 | (format:error "unknown control character `~c'" | |
| 823 | (string-ref format-string (- format:pos 1)))))) | |
| 824 | (else (anychar-dispatch)))))) ; in case of conditional | |
| 825 | ||
| 826 | (set! format:pos 0) | |
| 827 | (set! format:arg-pos 0) | |
| 828 | (anychar-dispatch) ; start the formatting | |
| 829 | (set! format:pos recursive-pos-save) | |
| 830 | arg-pos))) ; return the position in the arg. list | |
| 831 | ||
| a6b3219e MV |
832 | ;; when format:read-proof is true, format:obj->str will wrap |
| 833 | ;; result strings starting with "#<" in an extra pair of double | |
| 834 | ;; quotes. | |
| 835 | ||
| 093d2ca9 MV |
836 | (format:read-proof #f) |
| 837 | ||
| a6b3219e MV |
838 | ;; format:obj->str returns a R4RS representation as a string of |
| 839 | ;; an arbitrary scheme object. | |
| 093d2ca9 | 840 | |
| a6b3219e MV |
841 | (format:obj->str |
| 842 | (lambda (obj slashify) | |
| 843 | (let ((res (if slashify | |
| 844 | (object->string obj) | |
| 845 | (with-output-to-string (lambda () (display obj)))))) | |
| 846 | (if (and format:read-proof (string-prefix? "#<" res)) | |
| 847 | (object->string res) | |
| 848 | res)))) | |
| 093d2ca9 MV |
849 | |
| 850 | ;; format:char->str converts a character into a slashified string as | |
| 851 | ;; done by `write'. The procedure is dependent on the integer | |
| 852 | ;; representation of characters and assumes a character number according to | |
| 853 | ;; the ASCII character set. | |
| 854 | ||
| 855 | (format:char->str | |
| 856 | (lambda (ch) | |
| 857 | (let ((int-rep (char->integer ch))) | |
| 858 | (if (< int-rep 0) ; if chars are [-128...+127] | |
| 859 | (set! int-rep (+ int-rep 256))) | |
| 860 | (string-append | |
| 861 | "#\\" | |
| 862 | (cond | |
| 863 | ((char=? ch #\newline) "newline") | |
| 864 | ((and (>= int-rep 0) (<= int-rep 32)) | |
| 865 | (vector-ref format:ascii-non-printable-charnames int-rep)) | |
| 866 | ((= int-rep 127) "del") | |
| 867 | ((>= int-rep 128) ; octal representation | |
| 868 | (if format:radix-pref | |
| 869 | (let ((s (number->string int-rep 8))) | |
| 870 | (substring s 2 (string-length s))) | |
| 871 | (number->string int-rep 8))) | |
| 872 | (else (string ch))))))) | |
| 873 | ||
| 874 | (format:space-ch (char->integer #\space)) | |
| 875 | (format:zero-ch (char->integer #\0)) | |
| 876 | ||
| 877 | (format:par | |
| 878 | (lambda (pars length index default name) | |
| 879 | (if (> length index) | |
| 880 | (let ((par (list-ref pars index))) | |
| 881 | (if par | |
| 882 | (if name | |
| 883 | (if (< par 0) | |
| 884 | (format:error | |
| 885 | "~s parameter must be a positive integer" name) | |
| 886 | par) | |
| 887 | par) | |
| 888 | default)) | |
| 889 | default))) | |
| 890 | ||
| 891 | (format:out-obj-padded | |
| 892 | (lambda (pad-left obj slashify pars) | |
| 893 | (if (null? pars) | |
| 894 | (format:out-str (format:obj->str obj slashify)) | |
| 895 | (let ((l (length pars))) | |
| 896 | (let ((mincol (format:par pars l 0 0 "mincol")) | |
| 897 | (colinc (format:par pars l 1 1 "colinc")) | |
| 898 | (minpad (format:par pars l 2 0 "minpad")) | |
| 899 | (padchar (integer->char | |
| 900 | (format:par pars l 3 format:space-ch #f))) | |
| 901 | (objstr (format:obj->str obj slashify))) | |
| 902 | (if (not pad-left) | |
| 903 | (format:out-str objstr)) | |
| 904 | (do ((objstr-len (string-length objstr)) | |
| 905 | (i minpad (+ i colinc))) | |
| 906 | ((>= (+ objstr-len i) mincol) | |
| 907 | (format:out-fill i padchar))) | |
| 908 | (if pad-left | |
| 909 | (format:out-str objstr))))))) | |
| 910 | ||
| 911 | (format:out-num-padded | |
| 912 | (lambda (modifier number pars radix) | |
| 913 | (if (not (integer? number)) (format:error "argument not an integer")) | |
| 914 | (let ((numstr (number->string number radix))) | |
| 915 | (if (and format:radix-pref (not (= radix 10))) | |
| 916 | (set! numstr (substring numstr 2 (string-length numstr)))) | |
| 917 | (if (and (null? pars) (not modifier)) | |
| 918 | (format:out-str numstr) | |
| 919 | (let ((l (length pars)) | |
| 920 | (numstr-len (string-length numstr))) | |
| 921 | (let ((mincol (format:par pars l 0 #f "mincol")) | |
| 922 | (padchar (integer->char | |
| 923 | (format:par pars l 1 format:space-ch #f))) | |
| 924 | (commachar (integer->char | |
| 925 | (format:par pars l 2 (char->integer #\,) #f))) | |
| 926 | (commawidth (format:par pars l 3 3 "commawidth"))) | |
| 927 | (if mincol | |
| 928 | (let ((numlen numstr-len)) ; calc. the output len of number | |
| 260ffd61 | 929 | (if (and (memq modifier '(at colon-at)) (>= number 0)) |
| 093d2ca9 MV |
930 | (set! numlen (+ numlen 1))) |
| 931 | (if (memq modifier '(colon colon-at)) | |
| 932 | (set! numlen (+ (quotient (- numstr-len | |
| 933 | (if (< number 0) 2 1)) | |
| 934 | commawidth) | |
| 935 | numlen))) | |
| 936 | (if (> mincol numlen) | |
| 937 | (format:out-fill (- mincol numlen) padchar)))) | |
| 938 | (if (and (memq modifier '(at colon-at)) | |
| 260ffd61 | 939 | (>= number 0)) |
| 093d2ca9 MV |
940 | (format:out-char #\+)) |
| 941 | (if (memq modifier '(colon colon-at)) ; insert comma character | |
| 942 | (let ((start (remainder numstr-len commawidth)) | |
| 943 | (ns (if (< number 0) 1 0))) | |
| 944 | (format:out-substr numstr 0 start) | |
| 945 | (do ((i start (+ i commawidth))) | |
| 946 | ((>= i numstr-len)) | |
| 947 | (if (> i ns) | |
| 948 | (format:out-char commachar)) | |
| 949 | (format:out-substr numstr i (+ i commawidth)))) | |
| 950 | (format:out-str numstr)))))))) | |
| 951 | ||
| 952 | (format:tabulate | |
| 953 | (lambda (modifier pars) | |
| 954 | (let ((l (length pars))) | |
| 955 | (let ((colnum (format:par pars l 0 1 "colnum")) | |
| 956 | (colinc (format:par pars l 1 1 "colinc")) | |
| 957 | (padch (integer->char (format:par pars l 2 format:space-ch #f)))) | |
| 958 | (case modifier | |
| 959 | ((colon colon-at) | |
| 960 | (format:error "unsupported modifier for ~~t")) | |
| 961 | ((at) ; relative tabulation | |
| 962 | (format:out-fill | |
| 963 | (if (= colinc 0) | |
| 964 | colnum ; colnum = colrel | |
| 965 | (do ((c 0 (+ c colinc)) | |
| 966 | (col (+ format:output-col colnum))) | |
| 967 | ((>= c col) | |
| 968 | (- c format:output-col)))) | |
| 969 | padch)) | |
| 970 | (else ; absolute tabulation | |
| 971 | (format:out-fill | |
| 972 | (cond | |
| 973 | ((< format:output-col colnum) | |
| 974 | (- colnum format:output-col)) | |
| 975 | ((= colinc 0) | |
| 976 | 0) | |
| 977 | (else | |
| 978 | (do ((c colnum (+ c colinc))) | |
| 979 | ((>= c format:output-col) | |
| 980 | (- c format:output-col))))) | |
| 981 | padch))))))) | |
| 982 | ||
| 983 | ||
| 984 | ;; roman numerals (from dorai@cs.rice.edu). | |
| 985 | ||
| 986 | (format:roman-alist | |
| 987 | '((1000 #\M) (500 #\D) (100 #\C) (50 #\L) | |
| 988 | (10 #\X) (5 #\V) (1 #\I))) | |
| 989 | ||
| 990 | (format:roman-boundary-values | |
| 991 | '(100 100 10 10 1 1 #f)) | |
| 992 | ||
| 993 | (format:num->old-roman | |
| 994 | (lambda (n) | |
| 995 | (if (and (integer? n) (>= n 1)) | |
| 7da43e41 | 996 | (let loop ((n n) |
| 093d2ca9 | 997 | (romans format:roman-alist) |
| 7da43e41 | 998 | (s '())) |
| 093d2ca9 MV |
999 | (if (null? romans) (list->string (reverse s)) |
| 1000 | (let ((roman-val (caar romans)) | |
| 1001 | (roman-dgt (cadar romans))) | |
| 1002 | (do ((q (quotient n roman-val) (- q 1)) | |
| 1003 | (s s (cons roman-dgt s))) | |
| 1004 | ((= q 0) | |
| 1005 | (loop (remainder n roman-val) | |
| 1006 | (cdr romans) s)))))) | |
| 1007 | (format:error "only positive integers can be romanized")))) | |
| 1008 | ||
| 1009 | (format:num->roman | |
| 1010 | (lambda (n) | |
| 1011 | (if (and (integer? n) (> n 0)) | |
| 1012 | (let loop ((n n) | |
| 1013 | (romans format:roman-alist) | |
| 1014 | (boundaries format:roman-boundary-values) | |
| 1015 | (s '())) | |
| 1016 | (if (null? romans) | |
| 1017 | (list->string (reverse s)) | |
| 1018 | (let ((roman-val (caar romans)) | |
| 1019 | (roman-dgt (cadar romans)) | |
| 1020 | (bdry (car boundaries))) | |
| 1021 | (let loop2 ((q (quotient n roman-val)) | |
| 1022 | (r (remainder n roman-val)) | |
| 1023 | (s s)) | |
| 1024 | (if (= q 0) | |
| 1025 | (if (and bdry (>= r (- roman-val bdry))) | |
| 1026 | (loop (remainder r bdry) (cdr romans) | |
| 1027 | (cdr boundaries) | |
| 1028 | (cons roman-dgt | |
| 1029 | (append | |
| 1030 | (cdr (assv bdry romans)) | |
| 1031 | s))) | |
| 1032 | (loop r (cdr romans) (cdr boundaries) s)) | |
| 1033 | (loop2 (- q 1) r (cons roman-dgt s))))))) | |
| 1034 | (format:error "only positive integers can be romanized")))) | |
| 1035 | ||
| 1036 | ;; cardinals & ordinals (from dorai@cs.rice.edu) | |
| 1037 | ||
| 1038 | (format:cardinal-ones-list | |
| 1039 | '(#f "one" "two" "three" "four" "five" | |
| 1040 | "six" "seven" "eight" "nine" "ten" "eleven" "twelve" "thirteen" | |
| 1041 | "fourteen" "fifteen" "sixteen" "seventeen" "eighteen" | |
| 1042 | "nineteen")) | |
| 1043 | ||
| 1044 | (format:cardinal-tens-list | |
| 1045 | '(#f #f "twenty" "thirty" "forty" "fifty" "sixty" "seventy" "eighty" | |
| 1046 | "ninety")) | |
| 1047 | ||
| 1048 | (format:num->cardinal999 | |
| 1049 | (lambda (n) | |
| 1050 | ;this procedure is inspired by the Bruno Haible's CLisp | |
| 1051 | ;function format-small-cardinal, which converts numbers | |
| 1052 | ;in the range 1 to 999, and is used for converting each | |
| 1053 | ;thousand-block in a larger number | |
| 1054 | (let* ((hundreds (quotient n 100)) | |
| 1055 | (tens+ones (remainder n 100)) | |
| 1056 | (tens (quotient tens+ones 10)) | |
| 1057 | (ones (remainder tens+ones 10))) | |
| 1058 | (append | |
| 1059 | (if (> hundreds 0) | |
| 1060 | (append | |
| 1061 | (string->list | |
| 1062 | (list-ref format:cardinal-ones-list hundreds)) | |
| 1063 | (string->list" hundred") | |
| 1064 | (if (> tens+ones 0) '(#\space) '())) | |
| 1065 | '()) | |
| 1066 | (if (< tens+ones 20) | |
| 1067 | (if (> tens+ones 0) | |
| 1068 | (string->list | |
| 1069 | (list-ref format:cardinal-ones-list tens+ones)) | |
| 1070 | '()) | |
| 1071 | (append | |
| 1072 | (string->list | |
| 1073 | (list-ref format:cardinal-tens-list tens)) | |
| 1074 | (if (> ones 0) | |
| 1075 | (cons #\- | |
| 1076 | (string->list | |
| 1077 | (list-ref format:cardinal-ones-list ones))) | |
| 1078 | '()))))))) | |
| 1079 | ||
| 1080 | (format:cardinal-thousand-block-list | |
| 1081 | '("" " thousand" " million" " billion" " trillion" " quadrillion" | |
| 1082 | " quintillion" " sextillion" " septillion" " octillion" " nonillion" | |
| 1083 | " decillion" " undecillion" " duodecillion" " tredecillion" | |
| 1084 | " quattuordecillion" " quindecillion" " sexdecillion" " septendecillion" | |
| 1085 | " octodecillion" " novemdecillion" " vigintillion")) | |
| 1086 | ||
| 1087 | (format:num->cardinal | |
| 1088 | (lambda (n) | |
| 1089 | (cond ((not (integer? n)) | |
| 1090 | (format:error | |
| 1091 | "only integers can be converted to English cardinals")) | |
| 1092 | ((= n 0) "zero") | |
| 1093 | ((< n 0) (string-append "minus " (format:num->cardinal (- n)))) | |
| 1094 | (else | |
| 1095 | (let ((power3-word-limit | |
| 1096 | (length format:cardinal-thousand-block-list))) | |
| 1097 | (let loop ((n n) | |
| 1098 | (power3 0) | |
| 1099 | (s '())) | |
| 1100 | (if (= n 0) | |
| 1101 | (list->string s) | |
| 1102 | (let ((n-before-block (quotient n 1000)) | |
| 1103 | (n-after-block (remainder n 1000))) | |
| 1104 | (loop n-before-block | |
| 1105 | (+ power3 1) | |
| 1106 | (if (> n-after-block 0) | |
| 1107 | (append | |
| 1108 | (if (> n-before-block 0) | |
| 1109 | (string->list ", ") '()) | |
| 1110 | (format:num->cardinal999 n-after-block) | |
| 1111 | (if (< power3 power3-word-limit) | |
| 1112 | (string->list | |
| 1113 | (list-ref | |
| 1114 | format:cardinal-thousand-block-list | |
| 1115 | power3)) | |
| 1116 | (append | |
| 1117 | (string->list " times ten to the ") | |
| 1118 | (string->list | |
| 1119 | (format:num->ordinal | |
| 1120 | (* power3 3))) | |
| 1121 | (string->list " power"))) | |
| 1122 | s) | |
| 1123 | s)))))))))) | |
| 1124 | ||
| 1125 | (format:ordinal-ones-list | |
| 1126 | '(#f "first" "second" "third" "fourth" "fifth" | |
| 1127 | "sixth" "seventh" "eighth" "ninth" "tenth" "eleventh" "twelfth" | |
| 1128 | "thirteenth" "fourteenth" "fifteenth" "sixteenth" "seventeenth" | |
| 1129 | "eighteenth" "nineteenth")) | |
| 1130 | ||
| 1131 | (format:ordinal-tens-list | |
| 1132 | '(#f #f "twentieth" "thirtieth" "fortieth" "fiftieth" "sixtieth" | |
| 1133 | "seventieth" "eightieth" "ninetieth")) | |
| 1134 | ||
| 1135 | (format:num->ordinal | |
| 1136 | (lambda (n) | |
| 1137 | (cond ((not (integer? n)) | |
| 1138 | (format:error | |
| 1139 | "only integers can be converted to English ordinals")) | |
| 1140 | ((= n 0) "zeroth") | |
| 1141 | ((< n 0) (string-append "minus " (format:num->ordinal (- n)))) | |
| 1142 | (else | |
| 1143 | (let ((hundreds (quotient n 100)) | |
| 1144 | (tens+ones (remainder n 100))) | |
| 1145 | (string-append | |
| 1146 | (if (> hundreds 0) | |
| 1147 | (string-append | |
| 1148 | (format:num->cardinal (* hundreds 100)) | |
| 1149 | (if (= tens+ones 0) "th" " ")) | |
| 1150 | "") | |
| 1151 | (if (= tens+ones 0) "" | |
| 1152 | (if (< tens+ones 20) | |
| 1153 | (list-ref format:ordinal-ones-list tens+ones) | |
| 1154 | (let ((tens (quotient tens+ones 10)) | |
| 1155 | (ones (remainder tens+ones 10))) | |
| 1156 | (if (= ones 0) | |
| 1157 | (list-ref format:ordinal-tens-list tens) | |
| 1158 | (string-append | |
| 1159 | (list-ref format:cardinal-tens-list tens) | |
| 1160 | "-" | |
| 1161 | (list-ref format:ordinal-ones-list ones)))) | |
| 1162 | )))))))) | |
| 1163 | ||
| 1164 | ;; format inf and nan. | |
| 1165 | ||
| 1166 | (format:out-inf-nan | |
| 1167 | (lambda (number width digits edigits overch padch) | |
| 1168 | ;; inf and nan are always printed exactly as "+inf.0", "-inf.0" or | |
| 1169 | ;; "+nan.0", suitably justified in their field. We insist on | |
| 1170 | ;; printing this exact form so that the numbers can be read back in. | |
| 1171 | ||
| 1172 | (let* ((str (number->string number)) | |
| 1173 | (len (string-length str)) | |
| 1174 | (dot (string-index str #\.)) | |
| 1175 | (digits (+ (or digits 0) | |
| 1176 | (if edigits (+ edigits 2) 0)))) | |
| 1177 | (if (and width overch (< width len)) | |
| a0c39db3 | 1178 | (format:out-fill width (integer->char overch)) |
| 093d2ca9 MV |
1179 | (let* ((leftpad (if width |
| 1180 | (max (- width (max len (+ dot 1 digits))) 0) | |
| 1181 | 0)) | |
| 1182 | (rightpad (if width | |
| 1183 | (max (- width leftpad len) 0) | |
| 1184 | 0)) | |
| 1185 | (padch (integer->char (or padch format:space-ch)))) | |
| 1186 | (format:out-fill leftpad padch) | |
| 1187 | (format:out-str str) | |
| 1188 | (format:out-fill rightpad padch)))))) | |
| 1189 | ||
| 1190 | ;; format fixed flonums (~F) | |
| 1191 | ||
| 1192 | (format:out-fixed | |
| 1193 | (lambda (modifier number pars) | |
| 1194 | (if (not (or (number? number) (string? number))) | |
| 1195 | (format:error "argument is not a number or a number string")) | |
| 1196 | ||
| 1197 | (let ((l (length pars))) | |
| 1198 | (let ((width (format:par pars l 0 #f "width")) | |
| 1199 | (digits (format:par pars l 1 #f "digits")) | |
| 1200 | (scale (format:par pars l 2 0 #f)) | |
| 1201 | (overch (format:par pars l 3 #f #f)) | |
| 1202 | (padch (format:par pars l 4 format:space-ch #f))) | |
| 1203 | ||
| 1204 | (cond | |
| 1205 | ((or (inf? number) (nan? number)) | |
| 1206 | (format:out-inf-nan number width digits #f overch padch)) | |
| 1207 | ||
| 1208 | (digits | |
| 1209 | (format:parse-float | |
| 1210 | (if (string? number) number (number->string number)) #t scale) | |
| 1211 | (if (<= (- format:fn-len format:fn-dot) digits) | |
| 1212 | (format:fn-zfill #f (- digits (- format:fn-len format:fn-dot))) | |
| 1213 | (format:fn-round digits)) | |
| 1214 | (if width | |
| 1215 | (let ((numlen (+ format:fn-len 1))) | |
| 1216 | (if (or (not format:fn-pos?) (eq? modifier 'at)) | |
| 1217 | (set! numlen (+ numlen 1))) | |
| 1218 | (if (and (= format:fn-dot 0) (> width (+ digits 1))) | |
| 1219 | (set! numlen (+ numlen 1))) | |
| 1220 | (if (< numlen width) | |
| 1221 | (format:out-fill (- width numlen) (integer->char padch))) | |
| 1222 | (if (and overch (> numlen width)) | |
| a0c39db3 | 1223 | (format:out-fill width (integer->char overch)) |
| 093d2ca9 MV |
1224 | (format:fn-out modifier (> width (+ digits 1))))) |
| 1225 | (format:fn-out modifier #t))) | |
| 1226 | ||
| 1227 | (else | |
| 1228 | (format:parse-float | |
| 1229 | (if (string? number) number (number->string number)) #t scale) | |
| 1230 | (format:fn-strip) | |
| 1231 | (if width | |
| 1232 | (let ((numlen (+ format:fn-len 1))) | |
| 1233 | (if (or (not format:fn-pos?) (eq? modifier 'at)) | |
| 1234 | (set! numlen (+ numlen 1))) | |
| 1235 | (if (= format:fn-dot 0) | |
| 1236 | (set! numlen (+ numlen 1))) | |
| 1237 | (if (< numlen width) | |
| 1238 | (format:out-fill (- width numlen) (integer->char padch))) | |
| 1239 | (if (> numlen width) ; adjust precision if possible | |
| 1240 | (let ((dot-index (- numlen | |
| 1241 | (- format:fn-len format:fn-dot)))) | |
| 1242 | (if (> dot-index width) | |
| 1243 | (if overch ; numstr too big for required width | |
| 1244 | (format:out-fill width (integer->char overch)) | |
| 1245 | (format:fn-out modifier #t)) | |
| 1246 | (begin | |
| 1247 | (format:fn-round (- width dot-index)) | |
| 1248 | (format:fn-out modifier #t)))) | |
| 1249 | (format:fn-out modifier #t))) | |
| 1250 | (format:fn-out modifier #t)))))))) | |
| 1251 | ||
| 1252 | ;; format exponential flonums (~E) | |
| 1253 | ||
| 1254 | (format:out-expon | |
| 1255 | (lambda (modifier number pars) | |
| 1256 | (if (not (or (number? number) (string? number))) | |
| 1257 | (format:error "argument is not a number")) | |
| 1258 | ||
| 1259 | (let ((l (length pars))) | |
| 1260 | (let ((width (format:par pars l 0 #f "width")) | |
| 1261 | (digits (format:par pars l 1 #f "digits")) | |
| 1262 | (edigits (format:par pars l 2 #f "exponent digits")) | |
| 1263 | (scale (format:par pars l 3 1 #f)) | |
| 1264 | (overch (format:par pars l 4 #f #f)) | |
| 1265 | (padch (format:par pars l 5 format:space-ch #f)) | |
| 1266 | (expch (format:par pars l 6 #f #f))) | |
| 1267 | ||
| 1268 | (cond | |
| 1269 | ((or (inf? number) (nan? number)) | |
| 1270 | (format:out-inf-nan number width digits edigits overch padch)) | |
| 1271 | ||
| 1272 | (digits ; fixed precision | |
| 1273 | ||
| 1274 | (let ((digits (if (> scale 0) | |
| 1275 | (if (< scale (+ digits 2)) | |
| 1276 | (+ (- digits scale) 1) | |
| 1277 | 0) | |
| 1278 | digits))) | |
| 1279 | (format:parse-float | |
| 1280 | (if (string? number) number (number->string number)) #f scale) | |
| 1281 | (if (<= (- format:fn-len format:fn-dot) digits) | |
| 1282 | (format:fn-zfill #f (- digits (- format:fn-len format:fn-dot))) | |
| 1283 | (format:fn-round digits)) | |
| 1284 | (if width | |
| 1285 | (if (and edigits overch (> format:en-len edigits)) | |
| 1286 | (format:out-fill width (integer->char overch)) | |
| 1287 | (let ((numlen (+ format:fn-len 3))) ; .E+ | |
| 1288 | (if (or (not format:fn-pos?) (eq? modifier 'at)) | |
| 1289 | (set! numlen (+ numlen 1))) | |
| 1290 | (if (and (= format:fn-dot 0) (> width (+ digits 1))) | |
| 1291 | (set! numlen (+ numlen 1))) | |
| 1292 | (set! numlen | |
| 1293 | (+ numlen | |
| 1294 | (if (and edigits (>= edigits format:en-len)) | |
| 1295 | edigits | |
| 1296 | format:en-len))) | |
| 1297 | (if (< numlen width) | |
| 1298 | (format:out-fill (- width numlen) | |
| 1299 | (integer->char padch))) | |
| 1300 | (if (and overch (> numlen width)) | |
| 1301 | (format:out-fill width (integer->char overch)) | |
| a0c39db3 | 1302 | (begin |
| 093d2ca9 MV |
1303 | (format:fn-out modifier (> width (- numlen 1))) |
| 1304 | (format:en-out edigits expch))))) | |
| a0c39db3 MV |
1305 | (begin |
| 1306 | (format:fn-out modifier #t) | |
| 1307 | (format:en-out edigits expch))))) | |
| 093d2ca9 MV |
1308 | |
| 1309 | (else | |
| 1310 | (format:parse-float | |
| 1311 | (if (string? number) number (number->string number)) #f scale) | |
| 1312 | (format:fn-strip) | |
| 1313 | (if width | |
| 1314 | (if (and edigits overch (> format:en-len edigits)) | |
| 1315 | (format:out-fill width (integer->char overch)) | |
| 1316 | (let ((numlen (+ format:fn-len 3))) ; .E+ | |
| 1317 | (if (or (not format:fn-pos?) (eq? modifier 'at)) | |
| 1318 | (set! numlen (+ numlen 1))) | |
| 1319 | (if (= format:fn-dot 0) | |
| 1320 | (set! numlen (+ numlen 1))) | |
| 1321 | (set! numlen | |
| 1322 | (+ numlen | |
| 1323 | (if (and edigits (>= edigits format:en-len)) | |
| 1324 | edigits | |
| 1325 | format:en-len))) | |
| 1326 | (if (< numlen width) | |
| 1327 | (format:out-fill (- width numlen) | |
| 1328 | (integer->char padch))) | |
| 1329 | (if (> numlen width) ; adjust precision if possible | |
| 1330 | (let ((f (- format:fn-len format:fn-dot))) ; fract len | |
| 1331 | (if (> (- numlen f) width) | |
| 1332 | (if overch ; numstr too big for required width | |
| 1333 | (format:out-fill width | |
| 1334 | (integer->char overch)) | |
| 1335 | (begin | |
| 1336 | (format:fn-out modifier #t) | |
| 1337 | (format:en-out edigits expch))) | |
| 1338 | (begin | |
| 1339 | (format:fn-round (+ (- f numlen) width)) | |
| 1340 | (format:fn-out modifier #t) | |
| 1341 | (format:en-out edigits expch)))) | |
| 1342 | (begin | |
| 1343 | (format:fn-out modifier #t) | |
| 1344 | (format:en-out edigits expch))))) | |
| 1345 | (begin | |
| 1346 | (format:fn-out modifier #t) | |
| 1347 | (format:en-out edigits expch))))))))) | |
| 1348 | ||
| 1349 | ;; format general flonums (~G) | |
| 1350 | ||
| 1351 | (format:out-general | |
| 1352 | (lambda (modifier number pars) | |
| 1353 | (if (not (or (number? number) (string? number))) | |
| 1354 | (format:error "argument is not a number or a number string")) | |
| 1355 | ||
| 1356 | (let ((l (length pars))) | |
| 1357 | (let ((width (if (> l 0) (list-ref pars 0) #f)) | |
| 1358 | (digits (if (> l 1) (list-ref pars 1) #f)) | |
| 1359 | (edigits (if (> l 2) (list-ref pars 2) #f)) | |
| 1360 | (overch (if (> l 4) (list-ref pars 4) #f)) | |
| 1361 | (padch (if (> l 5) (list-ref pars 5) #f))) | |
| 1362 | (cond | |
| 1363 | ((or (inf? number) (nan? number)) | |
| 1364 | ;; FIXME: this isn't right. | |
| 1365 | (format:out-inf-nan number width digits edigits overch padch)) | |
| 1366 | (else | |
| 1367 | (format:parse-float | |
| 1368 | (if (string? number) number (number->string number)) #t 0) | |
| 1369 | (format:fn-strip) | |
| 1370 | (let* ((ee (if edigits (+ edigits 2) 4)) ; for the following algorithm | |
| 1371 | (ww (if width (- width ee) #f)) ; see Steele's CL book p.395 | |
| 1372 | (n (if (= format:fn-dot 0) ; number less than (abs 1.0) ? | |
| 1373 | (- (format:fn-zlead)) | |
| 1374 | format:fn-dot)) | |
| 1375 | (d (if digits | |
| 1376 | digits | |
| 1377 | (max format:fn-len (min n 7)))) ; q = format:fn-len | |
| 1378 | (dd (- d n))) | |
| 1379 | (if (<= 0 dd d) | |
| 1380 | (begin | |
| 1381 | (format:out-fixed modifier number (list ww dd #f overch padch)) | |
| 1382 | (format:out-fill ee #\space)) ;~@T not implemented yet | |
| 1383 | (format:out-expon modifier number pars))))))))) | |
| 1384 | ||
| 1385 | ;; format dollar flonums (~$) | |
| 1386 | ||
| 1387 | (format:out-dollar | |
| 1388 | (lambda (modifier number pars) | |
| 1389 | (if (not (or (number? number) (string? number))) | |
| 1390 | (format:error "argument is not a number or a number string")) | |
| 1391 | ||
| 1392 | (let ((l (length pars))) | |
| 1393 | (let ((digits (format:par pars l 0 2 "digits")) | |
| 1394 | (mindig (format:par pars l 1 1 "mindig")) | |
| 1395 | (width (format:par pars l 2 0 "width")) | |
| 1396 | (padch (format:par pars l 3 format:space-ch #f))) | |
| 1397 | ||
| cd5fea8d KR |
1398 | (cond |
| 1399 | ((or (inf? number) (nan? number)) | |
| 1400 | (format:out-inf-nan number width digits #f #f padch)) | |
| 1401 | ||
| 1402 | (else | |
| 1403 | (format:parse-float | |
| 1404 | (if (string? number) number (number->string number)) #t 0) | |
| 1405 | (if (<= (- format:fn-len format:fn-dot) digits) | |
| 1406 | (format:fn-zfill #f (- digits (- format:fn-len format:fn-dot))) | |
| 1407 | (format:fn-round digits)) | |
| 1408 | (let ((numlen (+ format:fn-len 1))) | |
| 1409 | (if (or (not format:fn-pos?) (memq modifier '(at colon-at))) | |
| 1410 | (set! numlen (+ numlen 1))) | |
| 1411 | (if (and mindig (> mindig format:fn-dot)) | |
| 1412 | (set! numlen (+ numlen (- mindig format:fn-dot)))) | |
| 1413 | (if (and (= format:fn-dot 0) (not mindig)) | |
| 1414 | (set! numlen (+ numlen 1))) | |
| 1415 | (if (< numlen width) | |
| 1416 | (case modifier | |
| 1417 | ((colon) | |
| 1418 | (if (not format:fn-pos?) | |
| 1419 | (format:out-char #\-)) | |
| 1420 | (format:out-fill (- width numlen) (integer->char padch))) | |
| 1421 | ((at) | |
| 1422 | (format:out-fill (- width numlen) (integer->char padch)) | |
| 1423 | (format:out-char (if format:fn-pos? #\+ #\-))) | |
| 1424 | ((colon-at) | |
| 1425 | (format:out-char (if format:fn-pos? #\+ #\-)) | |
| 1426 | (format:out-fill (- width numlen) (integer->char padch))) | |
| 1427 | (else | |
| 1428 | (format:out-fill (- width numlen) (integer->char padch)) | |
| 1429 | (if (not format:fn-pos?) | |
| 1430 | (format:out-char #\-)))) | |
| 1431 | (if format:fn-pos? | |
| 1432 | (if (memq modifier '(at colon-at)) (format:out-char #\+)) | |
| 1433 | (format:out-char #\-)))) | |
| 093d2ca9 | 1434 | (if (and mindig (> mindig format:fn-dot)) |
| cd5fea8d | 1435 | (format:out-fill (- mindig format:fn-dot) #\0)) |
| 093d2ca9 | 1436 | (if (and (= format:fn-dot 0) (not mindig)) |
| cd5fea8d KR |
1437 | (format:out-char #\0)) |
| 1438 | (format:out-substr format:fn-str 0 format:fn-dot) | |
| 1439 | (format:out-char #\.) | |
| 1440 | (format:out-substr format:fn-str format:fn-dot format:fn-len))))))) | |
| 093d2ca9 MV |
1441 | |
| 1442 | ; the flonum buffers | |
| 1443 | ||
| 1444 | (format:fn-max 400) ; max. number of number digits | |
| 1445 | (format:fn-str #f) ; number buffer | |
| 1446 | (format:fn-len 0) ; digit length of number | |
| 1447 | (format:fn-dot #f) ; dot position of number | |
| 1448 | (format:fn-pos? #t) ; number positive? | |
| 1449 | (format:en-max 10) ; max. number of exponent digits | |
| 1450 | (format:en-str #f) ; exponent buffer | |
| 1451 | (format:en-len 0) ; digit length of exponent | |
| 1452 | (format:en-pos? #t) ; exponent positive? | |
| 1453 | ||
| 1454 | (format:parse-float | |
| 1455 | (lambda (num-str fixed? scale) | |
| 1456 | (set! format:fn-pos? #t) | |
| 1457 | (set! format:fn-len 0) | |
| 1458 | (set! format:fn-dot #f) | |
| 1459 | (set! format:en-pos? #t) | |
| 1460 | (set! format:en-len 0) | |
| 1461 | (do ((i 0 (+ i 1)) | |
| 1462 | (left-zeros 0) | |
| 1463 | (mantissa? #t) | |
| 1464 | (all-zeros? #t) | |
| 1465 | (num-len (string-length num-str)) | |
| 1466 | (c #f)) ; current exam. character in num-str | |
| 1467 | ((= i num-len) | |
| 1468 | (if (not format:fn-dot) | |
| 1469 | (set! format:fn-dot format:fn-len)) | |
| 1470 | ||
| 1471 | (if all-zeros? | |
| 1472 | (begin | |
| 1473 | (set! left-zeros 0) | |
| 1474 | (set! format:fn-dot 0) | |
| 1475 | (set! format:fn-len 1))) | |
| 1476 | ||
| 1477 | ;; now format the parsed values according to format's need | |
| 1478 | ||
| 1479 | (if fixed? | |
| 1480 | ||
| 1481 | (begin ; fixed format m.nnn or .nnn | |
| 1482 | (if (and (> left-zeros 0) (> format:fn-dot 0)) | |
| 1483 | (if (> format:fn-dot left-zeros) | |
| 1484 | (begin ; norm 0{0}nn.mm to nn.mm | |
| 1485 | (format:fn-shiftleft left-zeros) | |
| afc4ccd4 KR |
1486 | (set! format:fn-dot (- format:fn-dot left-zeros)) |
| 1487 | (set! left-zeros 0)) | |
| 093d2ca9 MV |
1488 | (begin ; normalize 0{0}.nnn to .nnn |
| 1489 | (format:fn-shiftleft format:fn-dot) | |
| 1490 | (set! left-zeros (- left-zeros format:fn-dot)) | |
| 1491 | (set! format:fn-dot 0)))) | |
| 1492 | (if (or (not (= scale 0)) (> format:en-len 0)) | |
| 1493 | (let ((shift (+ scale (format:en-int)))) | |
| 1494 | (cond | |
| 1495 | (all-zeros? #t) | |
| 1496 | ((> (+ format:fn-dot shift) format:fn-len) | |
| 1497 | (format:fn-zfill | |
| 1498 | #f (- shift (- format:fn-len format:fn-dot))) | |
| 1499 | (set! format:fn-dot format:fn-len)) | |
| 1500 | ((< (+ format:fn-dot shift) 0) | |
| 1501 | (format:fn-zfill #t (- (- shift) format:fn-dot)) | |
| 1502 | (set! format:fn-dot 0)) | |
| 1503 | (else | |
| 1504 | (if (> left-zeros 0) | |
| 1505 | (if (<= left-zeros shift) ; shift always > 0 here | |
| 1506 | (format:fn-shiftleft shift) ; shift out 0s | |
| 1507 | (begin | |
| 1508 | (format:fn-shiftleft left-zeros) | |
| 1509 | (set! format:fn-dot (- shift left-zeros)))) | |
| 1510 | (set! format:fn-dot (+ format:fn-dot shift)))))))) | |
| 1511 | ||
| 1512 | (let ((negexp ; expon format m.nnnEee | |
| 1513 | (if (> left-zeros 0) | |
| 1514 | (- left-zeros format:fn-dot -1) | |
| 1515 | (if (= format:fn-dot 0) 1 0)))) | |
| 1516 | (if (> left-zeros 0) | |
| 1517 | (begin ; normalize 0{0}.nnn to n.nn | |
| 1518 | (format:fn-shiftleft left-zeros) | |
| 1519 | (set! format:fn-dot 1)) | |
| 1520 | (if (= format:fn-dot 0) | |
| 1521 | (set! format:fn-dot 1))) | |
| 1522 | (format:en-set (- (+ (- format:fn-dot scale) (format:en-int)) | |
| 1523 | negexp)) | |
| 1524 | (cond | |
| 1525 | (all-zeros? | |
| 1526 | (format:en-set 0) | |
| 1527 | (set! format:fn-dot 1)) | |
| 1528 | ((< scale 0) ; leading zero | |
| 1529 | (format:fn-zfill #t (- scale)) | |
| 1530 | (set! format:fn-dot 0)) | |
| 1531 | ((> scale format:fn-dot) | |
| 1532 | (format:fn-zfill #f (- scale format:fn-dot)) | |
| 1533 | (set! format:fn-dot scale)) | |
| 1534 | (else | |
| 1535 | (set! format:fn-dot scale))))) | |
| 1536 | #t) | |
| 1537 | ||
| 1538 | ;; do body | |
| 1539 | (set! c (string-ref num-str i)) ; parse the output of number->string | |
| 1540 | (cond ; which can be any valid number | |
| 1541 | ((char-numeric? c) ; representation of R4RS except | |
| 1542 | (if mantissa? ; complex numbers | |
| 1543 | (begin | |
| 1544 | (if (char=? c #\0) | |
| 1545 | (if all-zeros? | |
| 1546 | (set! left-zeros (+ left-zeros 1))) | |
| 1547 | (begin | |
| 1548 | (set! all-zeros? #f))) | |
| 1549 | (string-set! format:fn-str format:fn-len c) | |
| 1550 | (set! format:fn-len (+ format:fn-len 1))) | |
| 1551 | (begin | |
| 1552 | (string-set! format:en-str format:en-len c) | |
| 1553 | (set! format:en-len (+ format:en-len 1))))) | |
| 1554 | ((or (char=? c #\-) (char=? c #\+)) | |
| 1555 | (if mantissa? | |
| 1556 | (set! format:fn-pos? (char=? c #\+)) | |
| 1557 | (set! format:en-pos? (char=? c #\+)))) | |
| 1558 | ((char=? c #\.) | |
| 7da43e41 | 1559 | (set! format:fn-dot format:fn-len)) |
| 093d2ca9 MV |
1560 | ((char=? c #\e) |
| 1561 | (set! mantissa? #f)) | |
| 1562 | ((char=? c #\E) | |
| 1563 | (set! mantissa? #f)) | |
| 1564 | ((char-whitespace? c) #t) | |
| 1565 | ((char=? c #\d) #t) ; decimal radix prefix | |
| 1566 | ((char=? c #\#) #t) | |
| 7da43e41 | 1567 | (else |
| 093d2ca9 MV |
1568 | (format:error "illegal character `~c' in number->string" c)))))) |
| 1569 | ||
| 1570 | (format:en-int | |
| 1571 | (lambda () ; convert exponent string to integer | |
| 1572 | (if (= format:en-len 0) | |
| 1573 | 0 | |
| 1574 | (do ((i 0 (+ i 1)) | |
| 1575 | (n 0)) | |
| 1576 | ((= i format:en-len) | |
| 1577 | (if format:en-pos? | |
| 1578 | n | |
| 1579 | (- n))) | |
| 1580 | (set! n (+ (* n 10) (- (char->integer (string-ref format:en-str i)) | |
| 1581 | format:zero-ch))))))) | |
| 1582 | ||
| 1583 | (format:en-set ; set exponent string number | |
| 1584 | (lambda (en) | |
| 1585 | (set! format:en-len 0) | |
| 1586 | (set! format:en-pos? (>= en 0)) | |
| 1587 | (let ((en-str (number->string en))) | |
| 1588 | (do ((i 0 (+ i 1)) | |
| 1589 | (en-len (string-length en-str)) | |
| 1590 | (c #f)) | |
| 1591 | ((= i en-len)) | |
| 1592 | (set! c (string-ref en-str i)) | |
| 1593 | (if (char-numeric? c) | |
| 1594 | (begin | |
| 1595 | (string-set! format:en-str format:en-len c) | |
| 1596 | (set! format:en-len (+ format:en-len 1)))))))) | |
| 1597 | ||
| 1598 | (format:fn-zfill ; fill current number string with 0s | |
| 1599 | (lambda (left? n) | |
| 1600 | (if (> (+ n format:fn-len) format:fn-max) ; from the left or right | |
| 1601 | (format:error "number is too long to format (enlarge format:fn-max)")) | |
| 1602 | (set! format:fn-len (+ format:fn-len n)) | |
| 1603 | (if left? | |
| 1604 | (do ((i format:fn-len (- i 1))) ; fill n 0s to left | |
| 1605 | ((< i 0)) | |
| 1606 | (string-set! format:fn-str i | |
| 1607 | (if (< i n) | |
| 1608 | #\0 | |
| 1609 | (string-ref format:fn-str (- i n))))) | |
| 1610 | (do ((i (- format:fn-len n) (+ i 1))) ; fill n 0s to the right | |
| 1611 | ((= i format:fn-len)) | |
| 1612 | (string-set! format:fn-str i #\0))))) | |
| 1613 | ||
| 1614 | (format:fn-shiftleft ; shift left current number n positions | |
| 1615 | (lambda (n) | |
| 1616 | (if (> n format:fn-len) | |
| 1617 | (format:error "internal error in format:fn-shiftleft (~d,~d)" | |
| 1618 | n format:fn-len)) | |
| 1619 | (do ((i n (+ i 1))) | |
| 1620 | ((= i format:fn-len) | |
| 1621 | (set! format:fn-len (- format:fn-len n))) | |
| 1622 | (string-set! format:fn-str (- i n) (string-ref format:fn-str i))))) | |
| 1623 | ||
| 1624 | (format:fn-round ; round format:fn-str | |
| 1625 | (lambda (digits) | |
| 1626 | (set! digits (+ digits format:fn-dot)) | |
| 1627 | (do ((i digits (- i 1)) ; "099",2 -> "10" | |
| 1628 | (c 5)) ; "023",2 -> "02" | |
| 1629 | ((or (= c 0) (< i 0)) ; "999",2 -> "100" | |
| 1630 | (if (= c 1) ; "005",2 -> "01" | |
| 1631 | (begin ; carry overflow | |
| 1632 | (set! format:fn-len digits) | |
| 1633 | (format:fn-zfill #t 1) ; add a 1 before fn-str | |
| 1634 | (string-set! format:fn-str 0 #\1) | |
| 1635 | (set! format:fn-dot (+ format:fn-dot 1))) | |
| 1636 | (set! format:fn-len digits))) | |
| 1637 | (set! c (+ (- (char->integer (string-ref format:fn-str i)) | |
| 1638 | format:zero-ch) c)) | |
| 1639 | (string-set! format:fn-str i (integer->char | |
| 1640 | (if (< c 10) | |
| 1641 | (+ c format:zero-ch) | |
| 1642 | (+ (- c 10) format:zero-ch)))) | |
| 1643 | (set! c (if (< c 10) 0 1))))) | |
| 1644 | ||
| 1645 | (format:fn-out | |
| 1646 | (lambda (modifier add-leading-zero?) | |
| 1647 | (if format:fn-pos? | |
| 1648 | (if (eq? modifier 'at) | |
| 1649 | (format:out-char #\+)) | |
| 1650 | (format:out-char #\-)) | |
| 1651 | (if (= format:fn-dot 0) | |
| 1652 | (if add-leading-zero? | |
| 1653 | (format:out-char #\0)) | |
| 1654 | (format:out-substr format:fn-str 0 format:fn-dot)) | |
| 1655 | (format:out-char #\.) | |
| 1656 | (format:out-substr format:fn-str format:fn-dot format:fn-len))) | |
| 1657 | ||
| 1658 | (format:en-out | |
| 1659 | (lambda (edigits expch) | |
| 1660 | (format:out-char (if expch (integer->char expch) format:expch)) | |
| 1661 | (format:out-char (if format:en-pos? #\+ #\-)) | |
| 1662 | (if edigits | |
| 1663 | (if (< format:en-len edigits) | |
| 1664 | (format:out-fill (- edigits format:en-len) #\0))) | |
| 1665 | (format:out-substr format:en-str 0 format:en-len))) | |
| 1666 | ||
| 1667 | (format:fn-strip ; strip trailing zeros but one | |
| 1668 | (lambda () | |
| 1669 | (string-set! format:fn-str format:fn-len #\0) | |
| 1670 | (do ((i format:fn-len (- i 1))) | |
| 1671 | ((or (not (char=? (string-ref format:fn-str i) #\0)) | |
| 1672 | (<= i format:fn-dot)) | |
| 1673 | (set! format:fn-len (+ i 1)))))) | |
| 7da43e41 | 1674 | |
| 093d2ca9 MV |
1675 | (format:fn-zlead ; count leading zeros |
| 1676 | (lambda () | |
| 1677 | (do ((i 0 (+ i 1))) | |
| 1678 | ((or (= i format:fn-len) | |
| 1679 | (not (char=? (string-ref format:fn-str i) #\0))) | |
| 1680 | (if (= i format:fn-len) ; found a real zero | |
| 1681 | 0 | |
| 1682 | i))))) | |
| 7da43e41 | 1683 | |
| 7da43e41 | 1684 | |
| 093d2ca9 | 1685 | ;;; some global functions not found in SLIB |
| 7da43e41 | 1686 | |
| 093d2ca9 MV |
1687 | (string-capitalize-first ; "hello" -> "Hello" |
| 1688 | (lambda (str) | |
| 1689 | (let ((cap-str (string-copy str)) ; "hELLO" -> "Hello" | |
| 1690 | (non-first-alpha #f) ; "*hello" -> "*Hello" | |
| 1691 | (str-len (string-length str))) ; "hello you" -> "Hello you" | |
| 1692 | (do ((i 0 (+ i 1))) | |
| 1693 | ((= i str-len) cap-str) | |
| 1694 | (let ((c (string-ref str i))) | |
| 1695 | (if (char-alphabetic? c) | |
| 1696 | (if non-first-alpha | |
| 1697 | (string-set! cap-str i (char-downcase c)) | |
| 1698 | (begin | |
| 1699 | (set! non-first-alpha #t) | |
| 1700 | (string-set! cap-str i (char-upcase c)))))))))) | |
| 7da43e41 | 1701 | |
| 093d2ca9 MV |
1702 | ;; Aborts the program when a formatting error occures. This is a null |
| 1703 | ;; argument closure to jump to the interpreters toplevel continuation. | |
| 7da43e41 | 1704 | |
| 093d2ca9 MV |
1705 | (format:abort (lambda () (error "error in format")))) |
| 1706 | ||
| 1707 | (set! format:error-save format:error) | |
| 1708 | (set! format:fn-str (make-string format:fn-max)) ; number buffer | |
| 1709 | (set! format:en-str (make-string format:en-max)) ; exponent buffer | |
| 1710 | (apply format:format args))) | |
| d02655f7 | 1711 | |
| 14469b7c | 1712 | ;; Thanks to Shuji Narazaki |
| 296ff5e7 | 1713 | (module-set! the-root-module 'format format) |