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Workaround for missing lconv::decimal_point on android #523

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Merged
merged 1 commit into from
Sep 1, 2016
Merged

Workaround for missing lconv::decimal_point on android #523

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26 changes: 23 additions & 3 deletions src/lib_json/json_tool.h
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Original file line number Diff line number Diff line change
Expand Up @@ -15,6 +15,26 @@

namespace Json {

/// Fallback for decimal_point on android, where the lconv is an empty struct.
template<typename Lconv, bool=(sizeof(Lconv) >= sizeof(char*))>
struct Locale {
static char decimalPoint() {
return '\0';
}
};

/// Return decimal_point for the current locale.
template<typename Lconv>
struct Locale<Lconv, true> {
static char decimalPoint() {
Lconv* lc = localeconv();
if (lc == NULL) {
return '\0';
}
return *(lc->decimal_point);
}
};

/// Converts a unicode code-point to UTF-8.
static inline JSONCPP_STRING codePointToUTF8(unsigned int cp) {
JSONCPP_STRING result;
Expand Down Expand Up @@ -84,11 +104,11 @@ static inline void fixNumericLocale(char* begin, char* end) {
}

static inline void fixNumericLocaleInput(char* begin, char* end) {
struct lconv* lc = localeconv();
if ((lc != NULL) && (*(lc->decimal_point) != '.')) {
char decimalPoint = Locale<struct lconv>::decimalPoint();
if (decimalPoint != '\0' && decimalPoint != '.') {
while (begin < end) {
if (*begin == '.') {
*begin = *(lc->decimal_point);
*begin = decimalPoint;
}
++begin;
}
Expand Down