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Add preencoded JSON support. #139

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f475d3a
Add preencoded JSON support.
Mar 11, 2017
9b0b7c0
Refactor common object encoding to new function enc_object_element.
Mar 15, 2017
5b7cf0b
Refactor common array encoding to new function enc_array_element.
Mar 15, 2017
704547f
Add jiffy:partial_encode/2 function.
Mar 15, 2017
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245 changes: 138 additions & 107 deletions c_src/encoder.c
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Original file line number Diff line number Diff line change
Expand Up @@ -400,6 +400,33 @@ enc_string(Encoder* e, ERL_NIF_TERM val)
return 1;
}

static inline int
enc_json(Encoder* e, ERL_NIF_TERM val)
{
ErlNifBinary bin;
unsigned char* data;
size_t size;

if(!enif_is_binary(e->env, val)) {
return 0;
}
if(!enif_inspect_binary(e->env, val, &bin)) {
return 0;
}
data = bin.data;
size = bin.size;

if(!enc_ensure(e, size + 2)) {
return 0;
}

memcpy(e->p + e->i, data, size);
e->i += size;
e->count++;

return 1;
}

static inline int
enc_long(Encoder* e, ErlNifSInt64 val)
{
Expand Down Expand Up @@ -571,6 +598,91 @@ enc_map_to_ejson(ErlNifEnv* env, ERL_NIF_TERM map, ERL_NIF_TERM* out)
}
#endif

ERL_NIF_TERM
enc_object_element(Encoder* e, int first, ERL_NIF_TERM curr, ERL_NIF_TERM* stackp)
{
ErlNifEnv* env = e->env;
ERL_NIF_TERM stack = *stackp;
ERL_NIF_TERM item;
const ERL_NIF_TERM* tuple;
int arity;

if(first && !enc_start_object(e)) {
return enc_error(e, "internal_error");
}
if(enif_is_empty_list(env, curr)) {
if(!enc_end_object(e)) {
return enc_error(e, "internal_error");
}
return 0;
}
if(!enif_get_list_cell(env, curr, &item, &curr)) {
return enc_error(e, "internal_error");
}
if(!enif_get_tuple(env, item, &arity, &tuple)) {
return enc_obj_error(e, "invalid_object_member", item);
}
if(arity != 2) {
return enc_obj_error(e, "invalid_object_member_arity", item);
}
if(!first && !enc_comma(e)) {
return enc_error(e, "internal_error");
}
if(enif_compare(tuple[0], e->atoms->atom_partial_object) == 0) {
if(!enif_is_binary(env, tuple[1])) {
return enc_obj_error(e, "invalid_json_string", curr);
}
if(!enc_json(e, tuple[1])) {
return enc_error(e, "internal_error");
}
stack = enif_make_list_cell(env, curr, stack);
stack = enif_make_list_cell(env, e->atoms->ref_object, stack);
*stackp = stack;
} else {
if(!enc_string(e, tuple[0])) {
return enc_obj_error(e, "invalid_object_member_key", tuple[0]);
}
if(!enc_colon(e)) {
return enc_error(e, "internal_error");
}
stack = enif_make_list_cell(env, curr, stack);
stack = enif_make_list_cell(env, e->atoms->ref_object, stack);
stack = enif_make_list_cell(env, tuple[1], stack);
*stackp = stack;
}
return 0;
}

ERL_NIF_TERM
enc_array_element(Encoder* e, int first, ERL_NIF_TERM curr, ERL_NIF_TERM* stackp)
{
ErlNifEnv* env = e->env;
ERL_NIF_TERM stack = *stackp;
ERL_NIF_TERM item;

if(first && !enc_start_array(e)) {
return enc_error(e, "internal_error");
}
if(enif_is_empty_list(env, curr)) {
if(!enc_end_array(e)) {
return enc_error(e, "internal_error");
}
return 0;
}
if(!first && !enc_comma(e)) {
return enc_error(e, "internal_error");
}
if(!enif_get_list_cell(env, curr, &item, &curr)) {
return enc_error(e, "internal_error");
}
stack = enif_make_list_cell(env, curr, stack);
stack = enif_make_list_cell(env, e->atoms->ref_array, stack);
stack = enif_make_list_cell(env, item, stack);
*stackp = stack;
return 0;
}


ERL_NIF_TERM
encode_init(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{
Expand Down Expand Up @@ -685,63 +797,15 @@ encode_iter(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
ret = enc_error(e, "internal_error");
goto done;
}
if(enif_is_empty_list(env, curr)) {
if(!enc_end_object(e)) {
ret = enc_error(e, "internal_error");
goto done;
}
continue;
}
if(!enif_get_list_cell(env, curr, &item, &curr)) {
ret = enc_error(e, "internal_error");
goto done;
}
if(!enif_get_tuple(env, item, &arity, &tuple)) {
ret = enc_obj_error(e, "invalid_object_member", item);
goto done;
}
if(arity != 2) {
ret = enc_obj_error(e, "invalid_object_member_arity", item);
goto done;
}
if(!enc_comma(e)) {
ret = enc_error(e, "internal_error");
goto done;
}
if(!enc_string(e, tuple[0])) {
ret = enc_obj_error(e, "invalid_object_member_key", tuple[0]);
goto done;
}
if(!enc_colon(e)) {
ret = enc_error(e, "internal_error");
goto done;
}
stack = enif_make_list_cell(env, curr, stack);
stack = enif_make_list_cell(env, e->atoms->ref_object, stack);
stack = enif_make_list_cell(env, tuple[1], stack);
ret = enc_object_element(e, 0, curr, &stack);
if(ret) { goto done; }
} else if(enif_is_identical(curr, e->atoms->ref_array)) {
if(!enif_get_list_cell(env, stack, &curr, &stack)) {
ret = enc_error(e, "internal_error");
goto done;
}
if(enif_is_empty_list(env, curr)) {
if(!enc_end_array(e)) {
ret = enc_error(e, "internal_error");
goto done;
}
continue;
}
if(!enc_comma(e)) {
ret = enc_error(e, "internal_error");
goto done;
}
if(!enif_get_list_cell(env, curr, &item, &curr)) {
ret = enc_error(e, "internal_error");
goto done;
}
stack = enif_make_list_cell(env, curr, stack);
stack = enif_make_list_cell(env, e->atoms->ref_array, stack);
stack = enif_make_list_cell(env, item, stack);
ret = enc_array_element(e, 0, curr, &stack);
if(ret) { goto done; }
} else if(enif_compare(curr, e->atoms->atom_null) == 0) {
if(!enc_literal(e, "null", 4)) {
ret = enc_error(e, "null");
Expand Down Expand Up @@ -783,48 +847,31 @@ encode_iter(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
goto done;
}
} else if(enif_get_tuple(env, curr, &arity, &tuple)) {
if(arity != 1) {
ret = enc_obj_error(e, "invalid_ejson", curr);
goto done;
}
if(!enif_is_list(env, tuple[0])) {
ret = enc_obj_error(e, "invalid_object", curr);
goto done;
}
if(!enc_start_object(e)) {
ret = enc_error(e, "internal_error");
goto done;
}
if(enif_is_empty_list(env, tuple[0])) {
if(!enc_end_object(e)) {
if(arity == 1) {
if(!enif_is_list(env, tuple[0])) {
ret = enc_obj_error(e, "invalid_object", curr);
goto done;
}
ret = enc_object_element(e, 1, tuple[0], &stack);
if (ret) { goto done; }
} else if(arity == 2) {
if((enif_compare(tuple[0], e->atoms->atom_json) != 0) &&
(enif_compare(tuple[0], e->atoms->atom_partial_array) != 0)) {
ret = enc_obj_error(e, "invalid_ejson", curr);
goto done;
}
if(!enif_is_binary(env, tuple[1])) {
ret = enc_obj_error(e, "invalid_json_string", curr);
goto done;
}
if(!enc_json(e, tuple[1])) {
ret = enc_error(e, "internal_error");
goto done;
}
continue;
}
if(!enif_get_list_cell(env, tuple[0], &item, &curr)) {
ret = enc_error(e, "internal_error");
goto done;
}
if(!enif_get_tuple(env, item, &arity, &tuple)) {
ret = enc_obj_error(e, "invalid_object_member", item);
goto done;
}
if(arity != 2) {
ret = enc_obj_error(e, "invalid_object_member_arity", item);
goto done;
}
if(!enc_string(e, tuple[0])) {
ret = enc_obj_error(e, "invalid_object_member_key", tuple[0]);
goto done;
}
if(!enc_colon(e)) {
ret = enc_error(e, "internal_error");
} else {
ret = enc_obj_error(e, "invalid_ejson", curr);
goto done;
}
stack = enif_make_list_cell(env, curr, stack);
stack = enif_make_list_cell(env, e->atoms->ref_object, stack);
stack = enif_make_list_cell(env, tuple[1], stack);
#if MAP_TYPE_PRESENT
} else if(enif_is_map(env, curr)) {
if(!enc_map_to_ejson(env, curr, &curr)) {
Expand All @@ -834,24 +881,8 @@ encode_iter(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
stack = enif_make_list_cell(env, curr, stack);
#endif
} else if(enif_is_list(env, curr)) {
if(!enc_start_array(e)) {
ret = enc_error(e, "internal_error");
goto done;
}
if(enif_is_empty_list(env, curr)) {
if(!enc_end_array(e)) {
ret = enc_error(e, "internal_error");
goto done;
}
continue;
}
if(!enif_get_list_cell(env, curr, &item, &curr)) {
ret = enc_error(e, "internal_error");
goto done;
}
stack = enif_make_list_cell(env, curr, stack);
stack = enif_make_list_cell(env, e->atoms->ref_array, stack);
stack = enif_make_list_cell(env, item, stack);
ret = enc_array_element(e, 1, curr, &stack);
if(ret) { goto done; }
} else {
if(!enc_unknown(e, curr)) {
ret = enc_error(e, "internal_error");
Expand Down
3 changes: 3 additions & 0 deletions c_src/jiffy.c
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -16,6 +16,9 @@ load(ErlNifEnv* env, void** priv, ERL_NIF_TERM info)
st->atom_null = make_atom(env, "null");
st->atom_true = make_atom(env, "true");
st->atom_false = make_atom(env, "false");
st->atom_json = make_atom(env, "json");
st->atom_partial_object = make_atom(env, "$partial_object$");
st->atom_partial_array = make_atom(env, "$partial_array$");
st->atom_bignum = make_atom(env, "bignum");
st->atom_bignum_e = make_atom(env, "bignum_e");
st->atom_bigdbl = make_atom(env, "bigdbl");
Expand Down
3 changes: 3 additions & 0 deletions c_src/jiffy.h
View file
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Original file line number Diff line number Diff line change
Expand Up @@ -19,6 +19,9 @@ typedef struct {
ERL_NIF_TERM atom_null;
ERL_NIF_TERM atom_true;
ERL_NIF_TERM atom_false;
ERL_NIF_TERM atom_json;
ERL_NIF_TERM atom_partial_object;
ERL_NIF_TERM atom_partial_array;
ERL_NIF_TERM atom_bignum;
ERL_NIF_TERM atom_bignum_e;
ERL_NIF_TERM atom_bigdbl;
Expand Down
17 changes: 15 additions & 2 deletions src/jiffy.erl
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -2,7 +2,7 @@
% See the LICENSE file for more information.

-module(jiffy).
-export([decode/1, decode/2, encode/1, encode/2]).
-export([decode/1, decode/2, encode/1, encode/2, partial_encode/2]).
-define(NOT_LOADED, not_loaded(?LINE)).

-compile([no_native]).
Expand All @@ -16,7 +16,8 @@
| json_string()
| json_number()
| json_object()
| json_array().
| json_array()
| json_preencoded().

-type json_array() :: [json_value()].
-type json_string() :: atom() | binary().
Expand All @@ -33,6 +34,8 @@

-endif.

-type json_preencoded() :: {json, Json::binary()}.

-type jiffy_decode_result() :: json_value()
| {has_trailer, json_value(), binary()}.

Expand Down Expand Up @@ -104,6 +107,16 @@ encode(Data, Options) ->
end.


-spec partial_encode(json_array(), encode_options()) -> {'$partial_array$', binary()};
(json_object(), encode_options()) -> {'$partial_object$', binary()}.
partial_encode(Data, Options) when is_list(Data) ->
Json = iolist_to_binary(encode(Data, Options)),
{'$partial_array$', binary_part(Json, 1, byte_size(Json) - 2)};
partial_encode(Data, Options) when is_tuple(Data) ->
Json = iolist_to_binary(encode(Data, Options)),
{'$partial_object$', binary_part(Json, 1, byte_size(Json) - 2)}.


finish_decode({bignum, Value}) ->
list_to_integer(binary_to_list(Value));
finish_decode({bignum_e, Value}) ->
Expand Down
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