/*
* Decode JSON string in place.
*
* \param str_start Pointer to the beginning of the string (the opening " character).
*
* \return Number of bytes in decoded string (beginning from start).
*/
static int
json_decode_string(uint8_t *str_start, uint8_t *buf_end, uint8_t **str_end, uint32_t flags)
{
uint8_t *str = str_start;
uint8_t *out = str_start + 1; /* Decode string in place (skip the initial quote) */
int rc;
if (buf_end - str_start < 2) {
/*
* Shortest valid string (the empty string) is two bytes (""),
* so this can't possibly be valid
*/
return SPDK_JSON_PARSE_INCOMPLETE;
}
if (*str++ != '"') {
return SPDK_JSON_PARSE_INVALID;
}
while (str < buf_end) {
if (str[0] == '"') {
/*
* End of string.
* Update str_end to point at next input byte and return output length.
*/
*str_end = str + 1;
return out - str_start - 1;
} else if (str[0] == '\\') {
rc = json_decode_string_escape(&str, buf_end,
flags & SPDK_JSON_PARSE_FLAG_DECODE_IN_PLACE ? out : NULL);
assert(rc != 0);
if (rc < 0) {
return rc;
}
out += rc;
} else if (str[0] <= 0x1f) {
/* control characters must be escaped */
return SPDK_JSON_PARSE_INVALID;
} else {
rc = utf8_valid(str, buf_end);
if (rc == 0) {
return SPDK_JSON_PARSE_INCOMPLETE;
} else if (rc < 0) {
return SPDK_JSON_PARSE_INVALID;
}
if (out && out != str && (flags & SPDK_JSON_PARSE_FLAG_DECODE_IN_PLACE)) {
memmove(out, str, rc);
}
out += rc;
str += rc;
}
}
/* If execution gets here, we ran out of buffer. */
return SPDK_JSON_PARSE_INCOMPLETE;
}
bool CPPCMS_API valid_utf8(char const *begin,char const *end,size_t &count)
{
return utf8_valid(begin,end,count);
}