Adding upstream version 18.2.2.upstream/18.2.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 67 insertions, 0 deletions

diff --git a/src/common/pretty_binary.h b/src/common/pretty_binary.h
new file mode 100644
index 000000000..5f1829747
--- /dev/null
+++ b/src/common/pretty_binary.h
@@ -0,0 +1,67 @@
+// -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
+// vim: ts=8 sw=2 smarttab
+
+#pragma once
+
+#include <string>
+
+template<typename S>
+static std::string pretty_binary_string(const S& bin)
+{
+  std::string pretty;
+  if (bin.empty())
+    return pretty;
+  pretty.reserve(bin.length() * 3);
+  auto printable = [](unsigned char c) -> bool {
+    return (c >= 32) && (c <= 126);
+  };
+  auto append_hex = [&](unsigned char c) {
+    static const char hex[16] = {'0', '1', '2', '3',
+				 '4', '5', '6', '7',
+				 '8', '9', 'A', 'B',
+				 'C', 'D', 'E', 'F'};
+    pretty.push_back(hex[c / 16]);
+    pretty.push_back(hex[c % 16]);
+  };
+  // prologue
+  bool strmode = printable(bin[0]);
+  if (strmode) {
+    pretty.push_back('\'');
+  } else {
+    pretty.push_back('0');
+    pretty.push_back('x');
+  }
+  for (size_t i = 0; i < bin.length(); ++i) {
+    // change mode from hex to str if following 3 characters are printable
+    if (strmode) {
+      if (!printable(bin[i])) {
+	pretty.push_back('\'');
+	pretty.push_back('0');
+	pretty.push_back('x');
+	strmode = false;
+      }
+    } else {
+      if (i + 2 < bin.length() &&
+	  printable(bin[i]) &&
+	  printable(bin[i + 1]) &&
+	  printable(bin[i + 2])) {
+	pretty.push_back('\'');
+	strmode = true;
+      }
+    }
+    if (strmode) {
+      if (bin[i] == '\'')
+	pretty.push_back('\'');
+      pretty.push_back(bin[i]);
+    } else {
+      append_hex(bin[i]);
+    }
+  }
+  // epilog
+  if (strmode) {
+    pretty.push_back('\'');
+  }
+  return pretty;
+}
+
+std::string pretty_binary_string_reverse(const std::string& pretty);