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format.scm cleanups

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* module/ice-9/format.scm (format:symbol-case-conv)
  (format:iobj-case-conv): Remove these exports, they were not used.
  (format:expch): Remove this one, though it was used.
  (format:floats, format:complex-numbers, format:radix-pref): Inline
  these "configuration variables" into the format body.
This commit is contained in:
Andy Wingo 2010-12-18 11:27:19 +01:00
parent e3e3394374
commit 9ebf1af3c1
1 changed files with 16 additions and 60 deletions
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76
module/ice-9/format.scm
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@ -32,35 +32,10 @@
(define-module (ice-9 format)
#:use-module (ice-9 and-let-star)
#:autoload (ice-9 pretty-print) (pretty-print truncated-print)
#:replace (format)
#:export (format:symbol-case-conv
format:iobj-case-conv
format:expch))
#:replace (format))
;;; Configuration ------------------------------------------------------------
(define format:symbol-case-conv #f)
;; Symbols are converted by symbol->string so the case of the printed
;; symbols is implementation dependent. format:symbol-case-conv is a
;; one arg closure which is either #f (no conversion), string-upcase!,
;; string-downcase! or string-capitalize!.
(define format:iobj-case-conv #f)
;; As format:symbol-case-conv but applies for the representation of
;; implementation internal objects.
(define format:expch #\E)
;; The character prefixing the exponent value in ~e printing.
(define format:floats (provided? 'inexact))
;; Detects if the scheme system implements flonums (see at eof).
(define format:complex-numbers (provided? 'complex))
;; Detects if the scheme system implements complex numbers.
(define format:radix-pref (char=? #\# (string-ref (number->string 8 8) 0)))
;; Detects if number->string adds a radix prefix.
(define format:ascii-non-printable-charnames
'#("nul" "soh" "stx" "etx" "eot" "enq" "ack" "bel"
"bs" "ht" "nl" "vt" "np" "cr" "so" "si"
@ -385,30 +360,19 @@
(format:out-num-padded ; any Radix
modifier (next-arg) (cdr params) (car params)))
(anychar-dispatch))
((#\F) ; Fixed-format floating-point
(if format:floats
(format:out-fixed modifier (next-arg) params)
(format:out-str (number->string (next-arg))))
(anychar-dispatch))
((#\E) ; Exponential floating-point
(if format:floats
(format:out-expon modifier (next-arg) params)
(format:out-str (number->string (next-arg))))
(anychar-dispatch))
((#\G) ; General floating-point
(if format:floats
(format:out-general modifier (next-arg) params)
(format:out-str (number->string (next-arg))))
(anychar-dispatch))
((#\$) ; Dollars floating-point
(if format:floats
(format:out-dollar modifier (next-arg) params)
(format:out-str (number->string (next-arg))))
(anychar-dispatch))
((#\F) ; Fixed-format floating-point
(format:out-fixed modifier (next-arg) params)
(anychar-dispatch))
((#\E) ; Exponential floating-point
(format:out-expon modifier (next-arg) params)
(anychar-dispatch))
((#\G) ; General floating-point
(format:out-general modifier (next-arg) params)
(anychar-dispatch))
((#\$) ; Dollars floating-point
(format:out-dollar modifier (next-arg) params)
(anychar-dispatch))
((#\I) ; Complex numbers
(if (not format:complex-numbers)
(format:error
"complex numbers not supported by this scheme system"))
(let ((z (next-arg)))
(if (not (complex? z))
(format:error "argument not a complex number"))
@ -440,10 +404,7 @@
((>= c #x7f)
(format:out-str "#\\")
(format:out-str
(if format:radix-pref
(let ((s (number->string c 8)))
(substring s 2 (string-length s)))
(number->string c 8))))
(number->string c 8)))
(else
(format:out-char ch)))))
(else (format:out-char ch))))
@ -887,10 +848,7 @@
(vector-ref format:ascii-non-printable-charnames int-rep))
((= int-rep 127) "del")
((>= int-rep 128) ; octal representation
(if format:radix-pref
(let ((s (number->string int-rep 8)))
(substring s 2 (string-length s)))
(number->string int-rep 8)))
(number->string int-rep 8))
(else (string ch)))))))
(format:space-ch (char->integer #\space))
@ -934,8 +892,6 @@
(lambda (modifier number pars radix)
(if (not (integer? number)) (format:error "argument not an integer"))
(let ((numstr (number->string number radix)))
(if (and format:radix-pref (not (= radix 10)))
(set! numstr (substring numstr 2 (string-length numstr))))
(if (and (null? pars) (not modifier))
(format:out-str numstr)
(let ((l (length pars))
@ -1676,7 +1632,7 @@
(format:en-out
(lambda (edigits expch)
(format:out-char (if expch (integer->char expch) format:expch))
(format:out-char (if expch (integer->char expch) #\E))
(format:out-char (if format:en-pos? #\+ #\-))
(if edigits
(if (< format:en-len edigits)