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Fix (scheme base) string-for-each.

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* module/scheme/base.scm (r7:string-for-each): New procedure.

Fixes <https://bugs.gnu.org/40584>.
This commit is contained in:
Taylan Kammer 2021-05-12 22:36:26 +02:00 • committed by Daniel Llorens
parent 1e3b5390e3
commit 3243d96bb5
1 changed files with 24 additions and 2 deletions
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26
module/scheme/base.scm
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@ -51,6 +51,7 @@
open-output-bytevector get-output-bytevector
peek-u8 read-u8 read-bytevector read-bytevector!
read-string read-line
(r7:string-for-each . string-for-each)
write-u8 write-bytevector write-string flush-output-port
(r7:string-map . string-map)
bytevector bytevector-append
@ -106,7 +107,7 @@
real? remainder reverse round set!
set-car! set-cdr! string string->list string->number
string->symbol string-append
string-copy string-copy! string-fill! string-for-each
string-copy string-copy! string-fill!
string-length string-ref string-set! string<=? string<?
string=? string>=? string>? string? substring symbol->string
symbol? syntax-error syntax-rules truncate
@ -401,7 +402,28 @@
(define (r7:string-map proc s . s*)
(if (null? s*)
(string-map proc s)
(list->string (apply map proc (string->list s) (map string->list s*)))))
(list->string (apply map proc (string->list s) (map string->list
s*)))))
(define r7:string-for-each
(case-lambda
((proc s) (string-for-each proc s))
((proc s1 s2)
(let ((len (min (string-length s1)
(string-length s2))))
(let loop ((i 0))
(when (< i len)
(proc (string-ref s1 i)
(string-ref s2 i))
(loop (+ i 1))))))
((proc . strings)
(let ((len (apply min (map string-length strings))))
(let loop ((i 0))
(when (< i len)
(apply proc (map (lambda (s)
(string-ref s i))
strings))
(loop (+ i 1))))))))
(define (bytevector . lis)
(u8-list->bytevector lis))