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fix ,/. problem in reader #294

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Merged
merged 1 commit into from
Jun 19, 2015
Merged

fix ,/. problem in reader #294

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30 changes: 3 additions & 27 deletions src/lib_json/json_reader.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -597,33 +597,9 @@ bool Reader::decodeDouble(Token& token) {

bool Reader::decodeDouble(Token& token, Value& decoded) {
double value = 0;
const int bufferSize = 32;
int count;
int length = int(token.end_ - token.start_);

// Sanity check to avoid buffer overflow exploits.
if (length < 0) {
return addError("Unable to parse token length", token);
}

// Avoid using a string constant for the format control string given to
// sscanf, as this can cause hard to debug crashes on OS X. See here for more
// info:
//
// http://developer.apple.com/library/mac/#DOCUMENTATION/DeveloperTools/gcc-4.0.1/gcc/Incompatibilities.html
char format[] = "%lf";

if (length <= bufferSize) {
Char buffer[bufferSize + 1];
memcpy(buffer, token.start_, length);
buffer[length] = 0;
count = sscanf(buffer, format, &value);
} else {
std::string buffer(token.start_, token.end_);
count = sscanf(buffer.c_str(), format, &value);
}

if (count != 1)
std::string buffer(token.start_, token.end_);
std::istringstream is(buffer);
if (!(is >> value))
return addError("'" + std::string(token.start_, token.end_) +
"' is not a number.",
token);
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