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fix handling of escaped chars in json backend and frontend

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This commit is contained in:
N. Engelhardt 2022-02-18 17:13:09 +01:00
parent 1586000048
commit 8fd1b06249
5 changed files with 63 additions and 5 deletions
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34
frontends/json/jsonparse.cc
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@ -60,10 +60,38 @@ struct JsonNode
break;
if (ch == '\\') {
int ch = f.get();
ch = f.get();
if (ch == EOF)
log_error("Unexpected EOF in JSON string.\n");
switch (ch) {
case EOF: log_error("Unexpected EOF in JSON string.\n"); break;
case '"':
case '/':
case '\\': break;
case 'b': ch = '\b'; break;
case 'f': ch = '\f'; break;
case 'n': ch = '\n'; break;
case 'r': ch = '\r'; break;
case 't': ch = '\t'; break;
case 'u':
int val = 0;
for (int i = 0; i < 4; i++) {
ch = f.get();
val <<= 4;
if (ch >= '0' && '9' >= ch) {
val += ch - '0';
} else if (ch >= 'A' && 'F' >= ch) {
val += 10 + ch - 'A';
} else if (ch >= 'a' && 'f' >= ch) {
val += 10 + ch - 'a';
} else
log_error("Unexpected non-digit character in \\uXXXX sequence: %c.\n", ch);
}
if (val < 128)
ch = val;
else
log_error("Unsupported \\uXXXX sequence in JSON string: %04X.\n", val);
break;
}
}
data_string += ch;