diff options
| -rw-r--r-- | README.md | 10 | ||||
| -rw-r--r-- | lib.c | 43 |
2 files changed, 53 insertions, 0 deletions
@@ -945,3 +945,13 @@ replace("barfoobaz", /(.)(.)(.)/g, function(m, c1, c2, c3) { return c3 + c2 + c1; }) // raboofzab ``` + +#### 6.49. `json(str)` + +Parse the given string as JSON and return the resulting value. Throws an +exception on parse errors, trailing garbage or premature EOF. + +```javascript +json('{"a":true, "b":123}') // { "a": true, "b": 123 } +json('[1,2,') // Throws exception +``` @@ -2032,6 +2032,48 @@ ut_replace(struct ut_state *s, uint32_t off, struct json_object *args) return rv; } +static struct json_object * +ut_json(struct ut_state *s, uint32_t off, struct json_object *args) +{ + struct json_object *rv, *src = json_object_array_get_idx(args, 0); + struct json_tokener *tok = NULL; + enum json_tokener_error err; + const char *str; + size_t len; + + if (!json_object_is_type(src, json_type_string)) + return ut_exception(s, off, "Passed value is not a string"); + + tok = json_tokener_new(); + + if (!tok) + return ut_exception(s, off, UT_ERRMSG_OOM); + + str = json_object_get_string(src); + len = json_object_get_string_len(src); + + rv = json_tokener_parse_ex(tok, str, len); + err = json_tokener_get_error(tok); + + if (err == json_tokener_continue) { + json_object_put(rv); + rv = ut_exception(s, off, "Unexpected end of string in JSON data"); + } + else if (err != json_tokener_success) { + json_object_put(rv); + rv = ut_exception(s, off, "Failed to parse JSON string: %s", + json_tokener_error_desc(err)); + } + else if (json_tokener_get_parse_end(tok) < len) { + json_object_put(rv); + rv = ut_exception(s, off, "Trailing garbage after JSON data"); + } + + json_tokener_free(tok); + + return rv; +} + const struct ut_ops ut = { .register_function = ut_register_function, .register_type = ut_register_extended_type, @@ -2086,6 +2128,7 @@ static const struct { const char *name; ut_c_fn *func; } functions[] = { { "arrtoip", ut_arrtoip }, { "match", ut_match }, { "replace", ut_replace }, + { "json", ut_json }, }; |