From 3bdc28799718dc7d3d92b0f617f0ad45f638b1d7 Mon Sep 17 00:00:00 2001
From: Sandipan Mohanty <s.mohanty@fz-juelich.de>
Date: Sun, 8 May 2022 20:41:23 +0200
Subject: [PATCH] C++17 compatible binform for use in notebooks
---
code/include/binform17.hh | 49 +++++++++++++++++++++++++++++++++++++++
1 file changed, 49 insertions(+)
create mode 100644 code/include/binform17.hh
diff --git a/code/include/binform17.hh b/code/include/binform17.hh
new file mode 100644
index 0000000..d52ff9f
--- /dev/null
+++ b/code/include/binform17.hh
@@ -0,0 +1,49 @@
+#include <iostream>
+#include <bitset>
+#include <cstddef>
+#include <iomanip>
+
+namespace cxx2022 {
+using byte = unsigned char;
+
+template <class T>
+auto bits(T var)
+{
+ std::remove_cv_t<std::remove_reference_t<T>> loc{var};
+ unsigned long bytes{0UL};
+ byte* in = reinterpret_cast<byte *>(&loc);
+ byte* out = reinterpret_cast<byte *>(&bytes);
+ std::copy(in, in + sizeof(loc), out);
+ return std::bitset<8*sizeof(decltype(loc))>(bytes) ;
+}
+
+void showbits(double var)
+{
+ std::cout << "bits for double value " << var << "\n";
+ auto b = bits(var).to_string();
+ std::cout << "raw = " << b << "\n";
+ std::cout << "sign exponent mantissa\n"
+ << std::setw(6) << std::left << b[0]
+ << std::setw(16) << std::left << b.substr(1UL, 11)
+ << " " << b.substr(12) << "\n\n";
+}
+
+void showbits(float var)
+{
+ std::cout << "bits for float value " << var << "\n";
+ auto b = bits(var).to_string();
+ std::cout << "raw = " << b << "\n";
+ std::cout << "sign exponent mantissa\n"
+ << std::setw(6) << std::left << b[0]
+ << std::setw(16) << std::left << b.substr(1UL, 8)
+ << " " << b.substr(9) << "\n\n";
+}
+
+template <class T>
+void showbits(T var)
+{
+ std::cout << "bits for " << var << " with non-floating point type : " << bits(var) << "\n";
+}
+
+}
+
--
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