/* Check for both UTF-8ness and JSONness in one pass */
int
checkUTF8JSON(const unsigned char* data, size_t size) {
int expect = 0; /* Expect UTF code point to extend this many bytes */
int badjson = 0;
int badutf = 0;
const unsigned char *end = data + size;
JSON_checker jc = new_JSON_checker((size/2) + 1);
for(;data < end; data++) {
if(!JSON_checker_char(jc, *data)) {
badjson = 1;
break;
}
if(*data <= 0x7F) {
if(expect != 0) {
/* Must not be expecting >0x7F. */
badutf = 1;
break;
}
continue;
}
if((*data & 0xC0) == 0xC0) {
if(expect != 0) {
/* Beginning of UTF-8 multi-byte sequence inside of another one. */
badutf = 1;
break;
}
expect++;
if(*data & 0x20) expect++;
if((*data & 0x10) && expect == 2) expect++;
/* Verify zero bit separates count bits and codepoint bits */
if(expect == 3 && (*data & 0x8)) return false;
continue;
}
if(expect) {
expect--;
} else {
/* Got > 0x7F when not expecting it */
badutf = 1;
break;
}
}
if(!badjson) {
/* Feed fake space to the validator to force it to finish validating */
/* numerical values, iff it hasn't marked the current stream as valid */
if(jc->state != OK) {
badjson = !JSON_checker_char(jc, 32);
}
if(!badjson) {
badjson = !JSON_checker_done(jc);
}
}
return (!badjson && !badutf);
}
void u0025_jsonwriter__verify(SG_context * pCtx, SG_string* pstr)
{
const char *psz = SG_string__sz(pstr);
SG_int32* putf32 = NULL;
SG_uint32 len = 0;
JSON_checker jc = new_JSON_checker(20);
SG_uint32 i;
int ok = 0;
SG_utf8__to_utf32__sz(pCtx, psz, &putf32, &len);
for (i=0; i<len; i++)
{
ok = JSON_checker_char(jc, putf32[i]);
VERIFY_COND("JSON_checker_char", ok);
if (!ok)
{
break;
}
}
if (ok)
{
ok = JSON_checker_done(jc);
VERIFY_COND("JSON_checker_done", ok);
}
SG_NULLFREE(pCtx, putf32);
}
int sg_json_check(const char *json, int check_depth)
{
JSON_checker checker;
size_t i, len;
sg_assert(json);
sg_assert(check_depth > 0);
len = strlen(json);
if (len == 0) /* content null */
return -1;
checker = new_JSON_checker(check_depth);
for (i = 0; i < len; i++) {
if (json[i] <= 0)
break;
if (!JSON_checker_char(checker, json[i])) /* syntax error */
return -1;
}
if (!JSON_checker_done(checker)) /* syntax error */
return -1;
return 0;
}
int main(int argc, char ** argv)
{
int c;
JSON_checker jc = new_JSON_checker(255);
(void)argv;
if (argc != 1)
die(2, "wrong number of arguments");
for (c = getchar(); c > 0; c = getchar())
if (!JSON_checker_char(jc, c))
exit(1);
if (!JSON_checker_done(jc))
exit(1);
exit(0);
}
int main(int argc, char* argv[]) {
/*
Read STDIN. Exit with a message if the input is not well-formed JSON text.
jc will contain a JSON_checker with a maximum depth of 20.
*/
JSON_checker jc = new_JSON_checker(20);
for (;;) {
int next_char = getchar();
if (next_char <= 0) {
break;
}
if (!JSON_checker_char(jc, next_char)) {
fprintf(stderr, "JSON_checker_char: syntax error\n");
exit(1);
}
}
if (!JSON_checker_done(jc)) {
fprintf(stderr, "JSON_checker_end: syntax error\n");
exit(1);
}
}
