json_convert_to_float_core()

FL_NO_INLINE TypeConversionResult fl::detail::json_convert_to_float_core	(	const json_value &	val,
		float *	out_value )

Definition at line 116 of file json_dispatch.cpp.hpp.

                                                                               {
    TypeConversionResult result;
    if (auto* p = val.data.template ptr<float>()) {
        *out_value = *p;
        return result;
    }
    if (auto* p = val.data.template ptr<i64>()) {
#if FL_PLATFORM_HAS_LARGE_MEMORY
        *out_value = static_cast<float>(*p);
        if (sizeof(float) < 8 && (*p > 16777216 || *p < -16777216)) {
            result.addWarning(fl::string("large int ") + fl::to_string(*p) +
                              " may lose precision as float");
        }
#else
        // Avoid __aeabi_l2f via i32 route (same trick as #3076).
        if (*p > 2147483647LL) {
            *out_value = static_cast<float>(2147483647);
        } else if (*p < -2147483648LL) {
            *out_value = static_cast<float>(-2147483648);
        } else {
            *out_value = static_cast<float>(static_cast<fl::i32>(*p));
        }
#endif
        return result;
    }
    if (auto* p = val.data.template ptr<bool>()) {
        *out_value = *p ? 1.0f : 0.0f;
        result.addWarning(fl::string("bool converted to float ") +
                          (*p ? "1.0" : "0.0"));
        return result;
    }
    if (auto* p = val.data.template ptr<fl::string>()) {
#if FL_PLATFORM_HAS_LARGE_MEMORY
        char* end = nullptr;
        double parsed = fl::strtod(p->c_str(), &end);
        if (end != p->c_str() && *end == '\0') {
            *out_value = static_cast<float>(parsed);
            result.addWarning(fl::string("string '") + *p + "' parsed to float");
        } else {
            result.setError(fl::string("cannot parse string '") + *p + "' as float");
            *out_value = 0.0f;
        }
#else
        (void)p;
        *out_value = 0.0f;
        result.setError("string -> float not supported on Low-memory");
#endif
        return result;
    }
    if (val.data.template ptr<fl::nullptr_t>()) {
        result.setError("cannot convert null to float");
        *out_value = 0.0f;
        return result;
    }
    result.setError("cannot convert array or object to float");
    *out_value = 0.0f;
    return result;
}

References fl::end(), fl::FL_NO_EXCEPT, fl::strtod(), and fl::to_string().

Referenced by fl::detail::JsonToType< T, typename fl::enable_if< fl::is_floating_point< T >::value >::type >::convert().

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