mirror of
https://github.com/libguestfs/libguestfs.git
synced 2026-03-22 07:03:38 +00:00
77 lines
2.7 KiB
OCaml
77 lines
2.7 KiB
OCaml
(* JSON parser
|
||
* Copyright (C) 2015-2018 Red Hat Inc.
|
||
*
|
||
* This program is free software; you can redistribute it and/or modify
|
||
* it under the terms of the GNU General Public License as published by
|
||
* the Free Software Foundation; either version 2 of the License, or
|
||
* (at your option) any later version.
|
||
*
|
||
* This program is distributed in the hope that it will be useful,
|
||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
* GNU General Public License for more details.
|
||
*
|
||
* You should have received a copy of the GNU General Public License along
|
||
* with this program; if not, write to the Free Software Foundation, Inc.,
|
||
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
|
||
*)
|
||
|
||
open Std_utils
|
||
open Tools_utils
|
||
open Common_gettext.Gettext
|
||
|
||
external json_parser_tree_parse : string -> JSON.json_t = "virt_builder_json_parser_tree_parse"
|
||
external json_parser_tree_parse_file : string -> JSON.json_t = "virt_builder_json_parser_tree_parse_file"
|
||
|
||
let object_find_optional key = function
|
||
| JSON.Dict fields ->
|
||
(match List.filter (fun (k, _) -> k = key) fields with
|
||
| [(k, v)] -> Some v
|
||
| [] -> None
|
||
| _ -> error (f_"more than value for the key ‘%s’") key)
|
||
| _ -> error (f_"the value of the key ‘%s’ is not an object") key
|
||
|
||
let object_find key yv =
|
||
match object_find_optional key yv with
|
||
| None -> error (f_"missing value for the key ‘%s’") key
|
||
| Some v -> v
|
||
|
||
let object_get_string key yv =
|
||
match object_find key yv with
|
||
| JSON.String s -> s
|
||
| _ -> error (f_"the value for the key ‘%s’ is not a string") key
|
||
|
||
let object_find_object key yv =
|
||
match object_find key yv with
|
||
| JSON.Dict _ as o -> o
|
||
| _ -> error (f_"the value for the key ‘%s’ is not an object") key
|
||
|
||
let object_find_objects fn = function
|
||
| JSON.Dict fields -> List.filter_map fn fields
|
||
| _ -> error (f_"the value is not an object")
|
||
|
||
let object_get_object key yv =
|
||
match object_find_object key yv with
|
||
| JSON.Dict fields -> fields
|
||
| _ -> assert false (* object_find_object already errors out. *)
|
||
|
||
let object_get_number key yv =
|
||
match object_find key yv with
|
||
| JSON.Int n -> n
|
||
| JSON.Float f -> Int64.of_float f
|
||
| _ -> error (f_"the value for the key ‘%s’ is not an integer") key
|
||
|
||
let objects_get_string key yvs =
|
||
let rec loop = function
|
||
| [] -> None
|
||
| x :: xs ->
|
||
(match object_find_optional key x with
|
||
| Some (JSON.String s) -> Some s
|
||
| Some _ -> error (f_"the value for key ‘%s’ is not a string as expected") key
|
||
| None -> loop xs
|
||
)
|
||
in
|
||
match loop yvs with
|
||
| Some s -> s
|
||
| None -> error (f_"the key ‘%s’ was not found in a list of objects") key
|