system/serenity
system/serenity
1
0
Fork 0
mirror of https://github.com/SerenityOS/serenity synced 2024-07-22 02:26:11 +00:00
Code Issues Actions 5 Packages Projects Releases Wiki Activity

AK: Identify negative zero when parsing Json and represent with a double

Browse source 
Regardless of the backing type that the number would otherwise parse to,
if it is zero and the sign was supposed to be negative then it needs to
be a floating point number to represent the correct value.
This commit is contained in:
ForLoveOfCats 2022-01-19 11:40:18 -05:00 committed by Linus Groh
parent 7bea0d501e
commit 1d95fd5443
1 changed files with 8 additions and 0 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

8
AK/JsonParser.cpp
View file

@ -191,6 +191,7 @@ ErrorOr<JsonValue> JsonParser::parse_number()
Vector<char, 128> fraction_buffer;
bool is_double = false;
bool all_zero = true;
for (;;) {
char ch = peek();
if (ch == '.') {
@ -202,6 +203,9 @@ ErrorOr<JsonValue> JsonParser::parse_number()
continue;
}
if (ch == '-' || (ch >= '0' && ch <= '9')) {
if (ch != '-' && ch != '0')
all_zero = false;
if (is_double) {
if (ch == '-')
return Error::from_string_literal("JsonParser: Error while parsing number"sv);
@ -229,6 +233,10 @@ ErrorOr<JsonValue> JsonParser::parse_number()
StringView number_string(number_buffer.data(), number_buffer.size());
#ifndef KERNEL
// Check for negative zero which needs to be forced to be represented with a double
if (number_string.starts_with('-') && all_zero)
return JsonValue(-0.0);
if (is_double) {
// FIXME: This logic looks shaky.
int whole = 0;