Add csv library
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Makefile
2
Makefile
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@ -19,7 +19,7 @@ endif
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all: build
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build: retropikzel/${LIBRARY}/LICENSE retropikzel/${LIBRARY}/VERSION
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build: retropikzel/${LIBRARY}/LICENSE retropikzel/${LIBRARY}/VERSION retropikzel/${LIBRARY}/README.md
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echo "<pre>$$(cat retropikzel/${LIBRARY}/README.md)</pre>" > ${README}
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snow-chibi package --version=${VERSION} --authors=${AUTHOR} --doc=${README} --description="${DESCRIPTION}" ${LIBRARY_FILE}
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@ -0,0 +1,150 @@
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(define string-util-replace-count
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(lambda (text replace replace-with count)
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(letrec* ((inner-count 0)
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(looper (lambda (result text)
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(if (or (string=? replace "")
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(string=? text "")
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(= (string-length text) 0)
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(= inner-count count))
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(string-append result text)
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(if (and (char=? (string-ref replace 0) (string-ref text 0))
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(>= (string-length text) (string-length replace))
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(string=? (string-copy text 0 (string-length replace))
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replace))
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(begin
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(set! inner-count (+ inner-count 1))
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(looper (string-append result replace-with)
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(string-copy text (string-length replace))))
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(looper (string-append result (string-copy text 0 1))
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(string-copy text 1)))))))
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(looper "" text))))
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(define string-util-contains?
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(lambda (haystack needle)
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(if (string=? needle "")
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#f
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(if (string=? haystack
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(string-util-replace-count haystack
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needle
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""
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1))
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#f
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#t))))
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(define string-util-replace-all
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(lambda (text replace replace-with)
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(letrec ((looper (lambda (result text)
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(if (or (string=? replace "")
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(string=? text "")
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(= (string-length text) 0))
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result
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(if (and (char=? (string-ref replace 0) (string-ref text 0))
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(>= (string-length text) (string-length replace))
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(string=? (string-copy text 0 (string-length replace))
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replace))
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(looper (string-append result replace-with)
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(string-copy text (string-length replace)))
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(looper (string-append result (string-copy text 0 1))
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(string-copy text 1)))))))
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(looper "" text))))
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(define read-until-char
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(lambda (result port char)
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(let ((c (read-char port)))
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(cond
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((or (eof-object? c)
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(eof-object? (peek-char port)))
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(list->string (reverse result)))
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((and (not (char=? char #\"))
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(char=? c #\return)
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(char=? (peek-char port) #\newline))
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(list->string (reverse result)))
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((and (not (char=? char #\"))
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(char=? (peek-char port) #\newline))
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(list->string (reverse (cons c result))))
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(else
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; When reading inside " read "" as "
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(if (and (char=? char #\")
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(char=? c #\")
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(char=? (peek-char port) #\"))
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(read-until-char (cons (read-char port) result) port char)
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(if (char=? c char)
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(list->string (reverse result))
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(read-until-char (cons c result) port char))))))))
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1
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(define csv->list ;-> obj
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#|
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Reads csv from given port and transforms it into list of list.
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Each row is a list inside list of rows.
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|#
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(lambda (delimiter port)
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(csv->list-loop (list) (list) delimiter port)))
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(define csv->list-loop
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(lambda (result line-list delimiter port)
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(let* ((next-char (peek-char port)))
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(if (eof-object? next-char)
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(reverse result)
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(csv->list-loop
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(if (char=? next-char #\newline)
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(begin
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(read-char port)
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(set! result (cons (reverse line-list) result))
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(set! line-list (list))
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result)
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result)
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(cond
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((char=? next-char #\return)
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(read-char port)
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line-list)
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((char=? next-char delimiter)
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(read-char port)
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line-list)
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((char=? next-char #\")
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(read-char port)
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(cons (read-until-char (list) port #\") line-list))
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(else (cons (read-until-char (list) port delimiter) line-list)))
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delimiter port)))))
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(define (csv-from-list delimiter rows) ;-> string
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#| Transform list of lists into CSV string |#
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(let ((item-display
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(lambda (item)
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(let ((write? #f))
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(when (and (string? item)
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(string-util-contains? item (string delimiter)))
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(set! write? #t))
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(when (and (string? item)
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(string-util-contains? item "\""))
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(set! item (string-util-replace-all item "\"" "\"\""))
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(set! write? #t))
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(when (and (string? item)
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(= (string-length item) 0))
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(set! write? #t))
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(if write?
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(write item)
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(display item))))))
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(parameterize
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((current-output-port
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(open-output-string)))
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(for-each
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(lambda (row)
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(let ((index -1))
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(for-each
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(lambda (item)
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(set! index (+ index 1))
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(cond ((= index 0) (item-display item))
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(else (display ",")
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(item-display item))))
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row))
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(newline))
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rows)
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(get-output-string (current-output-port)))))
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(define csv-file->list
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(lambda (character file-path)
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(call-with-input-file
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file-path
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(lambda (csv-file-input-port)
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(csv->list character csv-file-input-port)))))
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@ -0,0 +1,10 @@
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(define-library
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(retropikzel csv)
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(import
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(scheme base)
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(scheme read)
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(scheme char)
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(scheme write)
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(scheme file))
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(export csv->list csv-from-list csv-file->list)
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(include "csv.scm"))
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@ -0,0 +1,165 @@
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GNU LESSER GENERAL PUBLIC LICENSE
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Version 3, 29 June 2007
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Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
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Everyone is permitted to copy and distribute verbatim copies
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of this license document, but changing it is not allowed.
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This version of the GNU Lesser General Public License incorporates
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the terms and conditions of version 3 of the GNU General Public
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License, supplemented by the additional permissions listed below.
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0. Additional Definitions.
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As used herein, "this License" refers to version 3 of the GNU Lesser
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General Public License, and the "GNU GPL" refers to version 3 of the GNU
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General Public License.
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"The Library" refers to a covered work governed by this License,
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other than an Application or a Combined Work as defined below.
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An "Application" is any work that makes use of an interface provided
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by the Library, but which is not otherwise based on the Library.
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Defining a subclass of a class defined by the Library is deemed a mode
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of using an interface provided by the Library.
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A "Combined Work" is a work produced by combining or linking an
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Application with the Library. The particular version of the Library
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with which the Combined Work was made is also called the "Linked
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Version".
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The "Minimal Corresponding Source" for a Combined Work means the
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Corresponding Source for the Combined Work, excluding any source code
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for portions of the Combined Work that, considered in isolation, are
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based on the Application, and not on the Linked Version.
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The "Corresponding Application Code" for a Combined Work means the
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object code and/or source code for the Application, including any data
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and utility programs needed for reproducing the Combined Work from the
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Application, but excluding the System Libraries of the Combined Work.
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1. Exception to Section 3 of the GNU GPL.
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You may convey a covered work under sections 3 and 4 of this License
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without being bound by section 3 of the GNU GPL.
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2. Conveying Modified Versions.
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If you modify a copy of the Library, and, in your modifications, a
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facility refers to a function or data to be supplied by an Application
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that uses the facility (other than as an argument passed when the
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facility is invoked), then you may convey a copy of the modified
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version:
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a) under this License, provided that you make a good faith effort to
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ensure that, in the event an Application does not supply the
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function or data, the facility still operates, and performs
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whatever part of its purpose remains meaningful, or
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b) under the GNU GPL, with none of the additional permissions of
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this License applicable to that copy.
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3. Object Code Incorporating Material from Library Header Files.
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The object code form of an Application may incorporate material from
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a header file that is part of the Library. You may convey such object
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code under terms of your choice, provided that, if the incorporated
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material is not limited to numerical parameters, data structure
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layouts and accessors, or small macros, inline functions and templates
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(ten or fewer lines in length), you do both of the following:
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a) Give prominent notice with each copy of the object code that the
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Library is used in it and that the Library and its use are
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covered by this License.
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b) Accompany the object code with a copy of the GNU GPL and this license
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document.
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4. Combined Works.
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You may convey a Combined Work under terms of your choice that,
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taken together, effectively do not restrict modification of the
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portions of the Library contained in the Combined Work and reverse
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engineering for debugging such modifications, if you also do each of
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the following:
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a) Give prominent notice with each copy of the Combined Work that
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the Library is used in it and that the Library and its use are
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covered by this License.
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b) Accompany the Combined Work with a copy of the GNU GPL and this license
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document.
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c) For a Combined Work that displays copyright notices during
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execution, include the copyright notice for the Library among
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these notices, as well as a reference directing the user to the
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copies of the GNU GPL and this license document.
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d) Do one of the following:
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0) Convey the Minimal Corresponding Source under the terms of this
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License, and the Corresponding Application Code in a form
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suitable for, and under terms that permit, the user to
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recombine or relink the Application with a modified version of
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the Linked Version to produce a modified Combined Work, in the
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manner specified by section 6 of the GNU GPL for conveying
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Corresponding Source.
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1) Use a suitable shared library mechanism for linking with the
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Library. A suitable mechanism is one that (a) uses at run time
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a copy of the Library already present on the user's computer
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system, and (b) will operate properly with a modified version
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of the Library that is interface-compatible with the Linked
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Version.
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e) Provide Installation Information, but only if you would otherwise
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be required to provide such information under section 6 of the
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GNU GPL, and only to the extent that such information is
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necessary to install and execute a modified version of the
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Combined Work produced by recombining or relinking the
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Application with a modified version of the Linked Version. (If
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you use option 4d0, the Installation Information must accompany
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the Minimal Corresponding Source and Corresponding Application
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Code. If you use option 4d1, you must provide the Installation
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Information in the manner specified by section 6 of the GNU GPL
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for conveying Corresponding Source.)
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5. Combined Libraries.
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You may place library facilities that are a work based on the
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Library side by side in a single library together with other library
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facilities that are not Applications and are not covered by this
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License, and convey such a combined library under terms of your
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choice, if you do both of the following:
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a) Accompany the combined library with a copy of the same work based
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on the Library, uncombined with any other library facilities,
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conveyed under the terms of this License.
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b) Give prominent notice with the combined library that part of it
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is a work based on the Library, and explaining where to find the
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accompanying uncombined form of the same work.
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6. Revised Versions of the GNU Lesser General Public License.
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The Free Software Foundation may publish revised and/or new versions
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of the GNU Lesser General Public License from time to time. Such new
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versions will be similar in spirit to the present version, but may
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differ in detail to address new problems or concerns.
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Each version is given a distinguishing version number. If the
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Library as you received it specifies that a certain numbered version
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of the GNU Lesser General Public License "or any later version"
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applies to it, you have the option of following the terms and
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conditions either of that published version or of any later version
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published by the Free Software Foundation. If the Library as you
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received it does not specify a version number of the GNU Lesser
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General Public License, you may choose any version of the GNU Lesser
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General Public License ever published by the Free Software Foundation.
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If the Library as you received it specifies that a proxy can decide
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whether future versions of the GNU Lesser General Public License shall
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apply, that proxy's public statement of acceptance of any version is
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permanent authorization for you to choose that version for the
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Library.
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@ -0,0 +1 @@
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<pre>CSV library for R7RS Schemes.</pre>
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@ -0,0 +1,2 @@
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CSV library for R7RS Schemes.
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@ -0,0 +1 @@
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1.0.0
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