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In JSONParser::getToken decode escaped chars inside state ls_backslash

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(except '\\' and '\uXXXX')
This commit is contained in:
m-holger 2023-01-27 18:02:35 +00:00
parent cee746fc15
commit 320245e0d1
1 changed files with 31 additions and 6 deletions
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37
libqpdf/JSON.cc
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@ -790,7 +790,6 @@ JSONParser::decode_string(std::string const& str, qpdf_offset_t offset)
i += 4;
break;
default:
throw std::logic_error("JSON parse: bad character after \\");
break;
}
} else {
@ -1052,17 +1051,43 @@ JSONParser::getToken()
ready = true;
} else if (*p == '\\') {
lex_state = ls_backslash;
action = ignore;
}
break;
case ls_backslash:
/* cSpell: ignore bfnrt */
if (strchr("\\\"/bfnrt", *p)) {
lex_state = ls_string;
} else if (*p == 'u') {
action = ignore;
lex_state = ls_string;
switch (*p) {
case '\\':
token += "\\\\";
case '\"':
case '/':
// \/ is allowed in json input, but so is /, so we
// don't map / to \/ in output.
token += *p;
break;
case 'b':
token += '\b';
break;
case 'f':
token += '\f';
break;
case 'n':
token += '\n';
break;
case 'r':
token += '\r';
break;
case 't':
token += '\t';
break;
case 'u':
token += "\\u";
lex_state = ls_u4;
u_count = 0;
} else {
break;
default:
QTC::TC("libtests", "JSON parse backslash bad character");
throw std::runtime_error(
"JSON: offset " + std::to_string(offset) +