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extmod, ujson: Add \uxxxx parsing in json strings.

This commit is contained in:
Damien George 2014-09-21 23:28:40 +01:00
parent fa2f1f72e0
commit df1e92ba3a
1 changed files with 16 additions and 2 deletions
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18
extmod/modujson.c
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@ -100,7 +100,7 @@ STATIC mp_obj_t mod_ujson_loads(mp_obj_t obj) {
break;
case '"':
vstr_reset(&vstr);
for (s++; s < top && *s != '"'; s++) {
for (s++; s < top && *s != '"';) {
byte c = *s;
if (c == '\\') {
s++;
@ -111,10 +111,24 @@ STATIC mp_obj_t mod_ujson_loads(mp_obj_t obj) {
case 'n': c = 0x0a; break;
case 'r': c = 0x0d; break;
case 't': c = 0x09; break;
case 'u': if (s + 4 >= top) { goto fail; } else { assert(0); } //vstr_add_char(&vstr, s[0]
case 'u': {
if (s + 4 >= top) { goto fail; }
mp_uint_t num = 0;
for (int i = 0; i < 4; i++) {
c = (*++s | 0x20) - '0';
if (c > 9) {
c -= ('a' - ('9' + 1));
}
num = (num << 4) | c;
}
vstr_add_char(&vstr, num);
goto str_cont;
}
}
}
vstr_add_byte(&vstr, c);
str_cont:
s++;
}
if (s == top) {
goto fail;