Commit 2c180f7c authored by Damien George's avatar Damien George
Browse files

extmod, ujson: Add test and comment for loads.

parent df1e92ba
......@@ -49,13 +49,26 @@ STATIC mp_obj_t mod_ujson_dumps(mp_obj_t obj) {
}
STATIC MP_DEFINE_CONST_FUN_OBJ_1(mod_ujson_dumps_obj, mod_ujson_dumps);
// This function implements a simple non-recursive JSON parser.
//
// The JSON specification is at http://www.ietf.org/rfc/rfc4627.txt
// The parser here will parse any valid JSON and return the correct
// corresponding Python object. It allows through a superset of JSON, since
// it treats commas and colons as "whitespace", and doesn't care if
// brackets/braces are correctly paired. It will raise a ValueError if the
// input is outside it's specs.
//
// Most of the work is parsing the primitives (null, false, true, numbers,
// strings). It does 1 pass over the input string and so is easily extended to
// being able to parse from a non-seekable stream. It tries to be fast and
// small in code size, while not using more RAM than necessary.
STATIC mp_obj_t mod_ujson_loads(mp_obj_t obj) {
mp_uint_t len;
const char *s = mp_obj_str_get_data(obj, &len);
const char *top = s + len;
vstr_t vstr;
vstr_init(&vstr, 8);
mp_obj_list_t stack;
mp_obj_list_t stack; // we use a list as a simple stack for nested JSON
stack.len = 0;
stack.items = NULL;
mp_obj_t stack_top = MP_OBJ_NULL;
......
try:
import ujson as json
except:
import json
def my_print(o):
if isinstance(o, dict):
print('sorted dict', sorted(o.items()))
else:
print(o)
my_print(json.loads('null'))
my_print(json.loads('false'))
my_print(json.loads('true'))
my_print(json.loads('1'))
my_print(json.loads('1.2'))
my_print(json.loads('1e2'))
my_print(json.loads('-2'))
my_print(json.loads('-2.3'))
my_print(json.loads('-2e3'))
my_print(json.loads('-2e-3'))
my_print(json.loads('"abc\\u0064e"'))
my_print(json.loads('[]'))
my_print(json.loads('[null]'))
my_print(json.loads('[null,false,true]'))
my_print(json.loads(' [ null , false , true ] '))
my_print(json.loads('{}'))
my_print(json.loads('{"a":true}'))
my_print(json.loads('{"a":null, "b":false, "c":true}'))
my_print(json.loads('{"a":[], "b":[1], "c":{"3":4}}'))
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