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This patch fixes a bug and related test failure on platforms where 'char'
is unsigned.
Taken from upstream:
https://github.com/open-source-parsers/jsoncpp/commit/f11611c8785082ead760494cba06196f14a06dcb
diff --git a/src/lib_json/json_writer.cpp b/src/lib_json/json_writer.cpp
index 8e06cca2..56195dc1 100644
--- a/src/lib_json/json_writer.cpp
+++ b/src/lib_json/json_writer.cpp
@@ -178,8 +178,9 @@ static bool isAnyCharRequiredQuoting(char const* s, size_t n) {
char const* const end = s + n;
for (char const* cur = s; cur < end; ++cur) {
- if (*cur == '\\' || *cur == '\"' || *cur < ' ' ||
- static_cast<unsigned char>(*cur) < 0x80)
+ if (*cur == '\\' || *cur == '\"' ||
+ static_cast<unsigned char>(*cur) < ' ' ||
+ static_cast<unsigned char>(*cur) >= 0x80)
return true;
}
return false;
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