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zxing::isnan implemented for different cases

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zxing::isnan for non msvc compilers was implemented with c99 function,
which is still not fully supported by some compilers (e.g., gcc).

I've added imlementation for compilers without c++11 or c99 support. And wraped
all releated code in #if.
This commit is contained in:
Sergey Platonov 2016-09-27 16:01:32 +03:00
parent fa186c2cc9
commit d49b7e12ad
1 changed files with 26 additions and 9 deletions
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35
src/zxing/zxing/ZXing.h
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@ -41,16 +41,20 @@
namespace zxing {
inline bool isnan_z(float v) {return std::isnan(v) != 0;}
inline bool isnan_z(double v) {return std::isnan(v) != 0;}
inline float nan() {return std::numeric_limits<float>::quiet_NaN();}
}
#else
//#include <cmath>
#elif (__cplusplus >= 201103L)
#include <cmath>
namespace zxing {
inline bool isnan_z(float v) {
return std::isnan(v);
}
inline bool isnan_z(double v) {
return std::isnan(v);
}
}
#elif(__STDC_VERSION__ >= 199901L)
#include <math.h>
namespace zxing {
inline bool isnan_z(float v) {
return isnan(v);
@ -58,11 +62,24 @@ inline bool isnan_z(float v) {
inline bool isnan_z(double v) {
return isnan(v);
}
inline float nan() {return std::numeric_limits<float>::quiet_NaN();}
}
#else
namespace zxing {
inline bool isnan_z(float v) {
volatile float d = v;
return d != d;
}
inline bool isnan_z(double v) {
volatile double d = v;
return d != d;
}
}
#endif
namespace zxing {
inline float nan() {return std::numeric_limits<float>::quiet_NaN();}
}
#if ZXING_DEBUG
#include <iostream>