128 lines
3.0 KiB
Factor
128 lines
3.0 KiB
Factor
! Copyright (C) 2007, 2008 Phil Dawes
|
|
! See http://factorcode.org/license.txt for BSD license.
|
|
USING: combinators fry io io.files io.streams.string kernel
|
|
make math memoize namespaces sequences sequences.private
|
|
unicode.categories ;
|
|
IN: csv
|
|
|
|
SYMBOL: delimiter
|
|
|
|
CHAR: , delimiter set-global
|
|
|
|
<PRIVATE
|
|
|
|
: delimiter> ( -- delimiter ) delimiter get ; inline
|
|
|
|
MEMO: (field-end) ( delimiter -- delimiter' )
|
|
"\n" swap suffix ; inline
|
|
|
|
MEMO: (quoted-field) ( delimiter -- delimiter' )
|
|
"\"\n" swap suffix ; inline
|
|
|
|
DEFER: quoted-field
|
|
|
|
: maybe-escaped-quote ( delimeter quoted? -- delimiter endchar )
|
|
read1 pick over =
|
|
[ nip ] [
|
|
{
|
|
{ CHAR: " [ [ CHAR: " , ] when quoted-field ] }
|
|
{ CHAR: \n [ ] } ! Error: newline inside string?
|
|
[ [ , drop f maybe-escaped-quote ] when* ]
|
|
} case
|
|
] if ;
|
|
|
|
: quoted-field ( delimiter -- delimiter endchar )
|
|
"\"" read-until drop % t maybe-escaped-quote ;
|
|
|
|
: ?trim ( string -- string' )
|
|
dup length [ drop "" ] [
|
|
over first-unsafe blank?
|
|
[ drop t ] [ 1 - over nth-unsafe blank? ] if
|
|
[ [ blank? ] trim ] when
|
|
] if-zero ; inline
|
|
|
|
: field ( delimiter -- delimiter sep string )
|
|
dup (quoted-field) read-until
|
|
dup CHAR: " = [
|
|
drop
|
|
[ [ quoted-field ] "" make ]
|
|
[
|
|
over (field-end) read-until
|
|
[ "\"" glue ] dip swap ?trim
|
|
]
|
|
if-empty
|
|
] [ swap ?trim ] if ;
|
|
|
|
: (row) ( delimiter -- delimiter sep )
|
|
f [ 2dup = ] [ drop field , ] do while ;
|
|
|
|
: row ( delimiter -- delimiter eof? array[string] )
|
|
[ (row) ] { } make ;
|
|
|
|
: (csv) ( -- )
|
|
delimiter>
|
|
[ dup [ empty? ] all? [ drop ] [ , ] if ]
|
|
[ row ] do while drop ;
|
|
|
|
PRIVATE>
|
|
|
|
: csv-row ( stream -- row )
|
|
[ delimiter> row 2nip ] with-input-stream ;
|
|
|
|
: csv ( stream -- rows )
|
|
[ [ (csv) ] { } make ] with-input-stream
|
|
dup last { "" } = [ but-last ] when ;
|
|
|
|
: string>csv ( string -- csv )
|
|
<string-reader> csv ;
|
|
|
|
: file>csv ( path encoding -- csv )
|
|
<file-reader> csv ;
|
|
|
|
: with-delimiter ( ch quot -- )
|
|
[ delimiter ] dip with-variable ; inline
|
|
|
|
<PRIVATE
|
|
|
|
: needs-escaping? ( cell delimiter -- ? )
|
|
'[ dup "\n\"" member? [ drop t ] [ _ = ] if ] any? ; inline
|
|
|
|
: escape-quotes ( cell -- cell' )
|
|
[
|
|
[
|
|
[ , ]
|
|
[ dup CHAR: " = [ , ] [ drop ] if ] bi
|
|
] each
|
|
] "" make ; inline
|
|
|
|
: enclose-in-quotes ( cell -- cell' )
|
|
"\"" dup surround ; inline
|
|
|
|
: escape-if-required ( cell delimiter -- cell' )
|
|
dupd needs-escaping?
|
|
[ escape-quotes enclose-in-quotes ] when ; inline
|
|
|
|
: (write-row) ( row delimiter -- )
|
|
dup '[ _ write1 ] swap
|
|
'[ _ escape-if-required write ] interleave nl ; inline
|
|
|
|
PRIVATE>
|
|
|
|
: write-row ( row -- )
|
|
delimiter> (write-row) ; inline
|
|
|
|
<PRIVATE
|
|
|
|
: (write-csv) ( rows -- )
|
|
delimiter> '[ _ (write-row) ] each ;
|
|
|
|
PRIVATE>
|
|
|
|
: write-csv ( rows stream -- )
|
|
[ (write-csv) ] with-output-stream ;
|
|
|
|
: csv>string ( csv -- string )
|
|
[ (write-csv) ] with-string-writer ;
|
|
|
|
: csv>file ( rows path encoding -- ) <file-writer> write-csv ;
|