Re: YAML parser?
On Tue, Mar 24, 2020 at 6:04 PM Matt Wette wrote:
> >
> I have updated this. I now have a procedure read-yaml-file which will
> read a yaml file and convert to a scheme tree.
>
> Matt
>
> $ GUILE_LOAD_PATH= guile demo1.scm
> (("doe" . "a deer, a female deer")
> ("ray" . "a drop of golden sun")
> ("pi" . "3.14159")
> ("xmas" . "true")
> ("french-hens" . "3")
> ("calling-birds"
>.
>#("huey" "dewey" "louie" "fred"))
> ("xmas-fifth-day"
>("calling-birds" . "four")
>("french-hens" . "3")
>("golden-rings" . "5")
>("partridges"
> ("count" . "1")
> ("location" . "a pear tree"))
>("turtle-doves" . "two"))
>
>
> from
>
>
> $ cat demo1.yml
> ---
> doe: "a deer, a female deer"
> ray: "a drop of golden sun"
> pi: 3.14159
> xmas: true
> french-hens: 3
> calling-birds:
> - huey
> - dewey
> - louie
> - fred
> xmas-fifth-day:
> calling-birds: four
> french-hens: 3
> golden-rings: 5
> partridges:
> count: 1
> location: "a pear tree"
> turtle-doves: two
>
>
This is great! Thank you so much.
Aleix
Re: YAML parser?
On 3/4/20 6:21 AM, Matt Wette wrote:
On 2/23/20 7:29 AM, Matt Wette wrote:
On 2/21/20 8:12 PM, Aleix Conchillo Flaqué wrote:
Hi,
does anyone know if there's any YAML parser for Guile? Haven't been
able to
find any.
Thanks!
Aleix
Hi Aleix,
I don't know of a YAML parser for Guile, but if you look at my email
posted 2/22 I have
a Guile package called NYACC. This includes a "FFI Helper" that can
generate the Guile
FFI code based on yaml.h from libyaml. The API is going to be
C-like but if you do some
work to paste something on the front you will have something, I think.
I have something working for reads. Check github dot com / mwette /
guile-libyaml
Download and run "guile demo1.scm". Compare to demo1.yml.
Matt
I have updated this. I now have a procedure read-yaml-file which will
read a yaml file and convert to a scheme tree.
Matt
$ GUILE_LOAD_PATH= guile demo1.scm
(("doe" . "a deer, a female deer")
("ray" . "a drop of golden sun")
("pi" . "3.14159")
("xmas" . "true")
("french-hens" . "3")
("calling-birds"
.
#("huey" "dewey" "louie" "fred"))
("xmas-fifth-day"
("calling-birds" . "four")
("french-hens" . "3")
("golden-rings" . "5")
("partridges"
("count" . "1")
("location" . "a pear tree"))
("turtle-doves" . "two"))
from
$ cat demo1.yml
---
doe: "a deer, a female deer"
ray: "a drop of golden sun"
pi: 3.14159
xmas: true
french-hens: 3
calling-birds:
- huey
- dewey
- louie
- fred
xmas-fifth-day:
calling-birds: four
french-hens: 3
golden-rings: 5
partridges:
count: 1
location: "a pear tree"
turtle-doves: two
Re: YAML parser?
On Wed, Mar 4, 2020 at 6:22 AM Matt Wette wrote: > On 2/23/20 7:29 AM, Matt Wette wrote: > > On 2/21/20 8:12 PM, Aleix Conchillo Flaqué wrote: > >> Hi, > >> > >> does anyone know if there's any YAML parser for Guile? Haven't been > >> able to > >> find any. > >> > >> Thanks! > >> > >> Aleix > > > > Hi Aleix, > > > > I don't know of a YAML parser for Guile, but if you look at my email > > posted 2/22 I have > > a Guile package called NYACC. This includes a "FFI Helper" that can > > generate the Guile > > FFI code based on yaml.h from libyaml. The API is going to be C-like > > but if you do some > > work to paste something on the front you will have something, I think. > > > > I have something working for reads. Check github dot com / mwette / > guile-libyaml > > Download and run "guile demo1.scm". Compare to demo1.yml. > Thanks! I'll take a look. Aleix
Re: YAML parser?
On 2/23/20 7:29 AM, Matt Wette wrote: On 2/21/20 8:12 PM, Aleix Conchillo Flaqué wrote: Hi, does anyone know if there's any YAML parser for Guile? Haven't been able to find any. Thanks! Aleix Hi Aleix, I don't know of a YAML parser for Guile, but if you look at my email posted 2/22 I have a Guile package called NYACC. This includes a "FFI Helper" that can generate the Guile FFI code based on yaml.h from libyaml. The API is going to be C-like but if you do some work to paste something on the front you will have something, I think. I have something working for reads. Check github dot com / mwette / guile-libyaml Download and run "guile demo1.scm". Compare to demo1.yml. Matt
Re: YAML parser?
On Fri, Feb 21, 2020 at 11:13 PM Aleix Conchillo Flaqué wrote: > > Hi, > > does anyone know if there's any YAML parser for Guile? Haven't been able to > find any. None that I know of. I made an attempt to write one years ago, but the YAML specification is so complex that it didn't feel worth the effort. - Dave
Re: YAML parser?
On 2/23/20 7:29 AM, Matt Wette wrote: On 2/21/20 8:12 PM, Aleix Conchillo Flaqué wrote: Hi, does anyone know if there's any YAML parser for Guile? Haven't been able to find any. Thanks! Aleix Hi Aleix, I don't know of a YAML parser for Guile, but if you look at my email posted 2/22 I have a Guile package called NYACC. This includes a "FFI Helper" that can generate the Guile FFI code based on yaml.h from libyaml. The API is going to be C-like but if you do some work to paste something on the front you will have something, I think. Below I have a demo program and the yaml.ffi file used to generate yaml.scm. When executed, the demo program outputs the following: $ guile demo1.scm # YAML_MAPPING_NODE I am working on this a bit more. This requires some second order programming (e.g., pointers used as vectors) so don't kill yourself. I'm looking into it more. Matt
Re: YAML parser?
On 2/21/20 8:12 PM, Aleix Conchillo Flaqué wrote:
Hi,
does anyone know if there's any YAML parser for Guile? Haven't been able to
find any.
Thanks!
Aleix
Hi Aleix,
I don't know of a YAML parser for Guile, but if you look at my email
posted 2/22 I have
a Guile package called NYACC. This includes a "FFI Helper" that can
generate the Guile
FFI code based on yaml.h from libyaml. The API is going to be C-like
but if you do some
work to paste something on the front you will have something, I think.
Below I have a demo program and the yaml.ffi file used to generate yaml.scm.
When executed, the demo program outputs the following:
$ guile demo1.scm
#
YAML_MAPPING_NODE
The demo program: =
(use-modules ((system foreign) #:prefix ffi:))
(use-modules (bytestructures guile))
(use-modules (system ffi-help-rt))
(use-modules (ffi yaml))
(define (sf fmt . args) (apply simple-format #t fmt args))
(define fopen
(let ((~fopen (ffi:pointer->procedure
'* (dynamic-func "fopen" (dynamic-link)) (list '* '*
(lambda (filename mode)
(~fopen (ffi:string->pointer filename) (ffi:string->pointer mode)
(define fclose
(let ((~fclose (ffi:pointer->procedure
ffi:int (dynamic-func "fclose" (dynamic-link)) (list '*
(lambda (file)
(~fclose file
(let* ((filename "demo1.yml")
(parser (make-yaml_parser_t))
(&parser (pointer-to parser))
(document (make-yaml_document_t))
(&document (pointer-to document))
(file (fopen filename "r"))
(root #f))
(yaml_parser_initialize &parser)
(yaml_parser_set_input_file &parser file)
(yaml_parser_load &parser &document)
(set! root (yaml_document_get_root_node &document))
(sf "~S\n" root)
(sf "~S\n" (wrap-yaml_node_type_t (fh-object-ref root 'type)))
(yaml_document_delete &document)
(yaml_parser_delete &parser)
(fclose file))
The yaml.ffi file (included in nyacc): =
;; yaml.ffi -*- Scheme -*-
;; Copyright (C) 2020 Matthew R. Wette
;;
;; Copying and distribution of this file, with or without modification,
;; are permitted in any medium without royalty provided the copyright
;; notice and this notice are preserved. This file is offered as-is,
;; without any warranty.
(define-ffi-module (ffi yaml)
#:include '("yaml.h")
#:library '("libyaml"))
;; --- last line ---
