Diff: Utilities/system_error.hpp

Revision:

0:f77ad7f72d04

Child:

3:f818ea5172ed

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Utilities/system_error.hpp	Mon Nov 06 14:39:18 2017 -0600
@@ -0,0 +1,167 @@
+/*******************************************************************************
+* Copyright (C) 2017 Maxim Integrated Products, Inc., All Rights Reserved.
+*
+* Permission is hereby granted, free of charge, to any person obtaining a
+* copy of this software and associated documentation files (the "Software"),
+* to deal in the Software without restriction, including without limitation
+* the rights to use, copy, modify, merge, publish, distribute, sublicense,
+* and/or sell copies of the Software, and to permit persons to whom the
+* Software is furnished to do so, subject to the following conditions:
+*
+* The above copyright notice and this permission notice shall be included
+* in all copies or substantial portions of the Software.
+*
+* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
+* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+* IN NO EVENT SHALL MAXIM INTEGRATED BE LIABLE FOR ANY CLAIM, DAMAGES
+* OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
+* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
+* OTHER DEALINGS IN THE SOFTWARE.
+*
+* Except as contained in this notice, the name of Maxim Integrated
+* Products, Inc. shall not be used except as stated in the Maxim Integrated
+* Products, Inc. Branding Policy.
+*
+* The mere transfer of this software does not imply any licenses
+* of trade secrets, proprietary technology, copyrights, patents,
+* trademarks, maskwork rights, or any other form of intellectual
+* property whatsoever. Maxim Integrated Products, Inc. retains all
+* ownership rights.
+*******************************************************************************/
+
+#ifndef MaximInterface_system_error
+#define MaximInterface_system_error
+
+#include <string>
+#include <MaximInterface/Utilities/Export.h>
+#include "Uncopyable.hpp"
+
+namespace MaximInterface {
+
+class error_condition;
+class error_code;
+
+class error_category : private Uncopyable {
+public:
+  virtual ~error_category() {}
+
+  virtual const char * name() const = 0;
+  MaximInterface_EXPORT virtual error_condition
+  default_error_condition(int code) const;
+  MaximInterface_EXPORT virtual bool
+  equivalent(int code, const error_condition & condition) const;
+  MaximInterface_EXPORT virtual bool equivalent(const error_code & code,
+                                                int condition) const;
+  virtual std::string message(int condition) const = 0;
+};
+inline bool operator==(const error_category & lhs, const error_category & rhs) {
+  return &lhs == &rhs;
+}
+inline bool operator!=(const error_category & lhs, const error_category & rhs) {
+  return !operator==(lhs, rhs);
+}
+inline bool operator<(const error_category & lhs, const error_category & rhs) {
+  return &lhs < &rhs;
+}
+
+MaximInterface_EXPORT const error_category & system_category();
+
+class error_condition {
+public:
+  error_condition() : value_(0), category_(&system_category()) {}
+  error_condition(int value, const error_category & category)
+      : value_(value), category_(&category) {}
+
+  void assign(int value, const error_category & category) {
+    value_ = value;
+    category_ = &category;
+  }
+  void clear() {
+    value_ = 0;
+    category_ = &system_category();
+  }
+  int value() const { return value_; }
+  const error_category & category() const { return *category_; }
+  std::string message() const { return category().message(value()); }
+  operator bool() const { return value() != 0; }
+
+private:
+  int value_;
+  const error_category * category_;
+};
+inline bool operator==(const error_condition & lhs,
+                       const error_condition & rhs) {
+  return (lhs.value() == rhs.value()) && (lhs.category() == rhs.category());
+}
+inline bool operator!=(const error_condition & lhs,
+                       const error_condition & rhs) {
+  return !operator==(lhs, rhs);
+}
+inline bool operator<(const error_condition & lhs,
+                      const error_condition & rhs) {
+  return (lhs.category() < rhs.category()) ||
+         ((lhs.category() == rhs.category()) && (lhs.value() < rhs.value()));
+}
+
+class error_code {
+public:
+  error_code() : value_(0), category_(&system_category()) {}
+  error_code(int value, const error_category & category)
+      : value_(value), category_(&category) {}
+
+  void assign(int value, const error_category & category) {
+    value_ = value;
+    category_ = &category;
+  }
+  void clear() {
+    value_ = 0;
+    category_ = &system_category();
+  }
+  int value() const { return value_; }
+  const error_category & category() const { return *category_; }
+  error_condition default_error_condition() const {
+    return category().default_error_condition(value());
+  }
+  std::string message() const { return category().message(value()); }
+  operator bool() const { return value() != 0; }
+
+private:
+  int value_;
+  const error_category * category_;
+};
+inline bool operator==(const error_code & lhs, const error_code & rhs) {
+  return (lhs.value() == rhs.value()) && (lhs.category() == rhs.category());
+}
+inline bool operator!=(const error_code & lhs, const error_code & rhs) {
+  return !operator==(lhs, rhs);
+}
+inline bool operator<(const error_code & lhs, const error_code & rhs) {
+  return (lhs.category() < rhs.category()) ||
+         ((lhs.category() == rhs.category()) && (lhs.value() < rhs.value()));
+}
+
+template <typename CharT, typename Traits>
+std::basic_ostream<CharT, Traits> &
+operator<<(std::basic_ostream<CharT, Traits> & os, const error_code & ec) {
+  os << ec.category().name() << ':' << ec.value();
+  return os;
+}
+
+inline bool operator==(const error_code & lhs, const error_condition & rhs) {
+  return lhs.category().equivalent(lhs.value(), rhs) ||
+         rhs.category().equivalent(lhs, rhs.value());
+}
+inline bool operator!=(const error_code & lhs, const error_condition & rhs) {
+  return !operator==(lhs, rhs);
+}
+inline bool operator==(const error_condition & lhs, const error_code & rhs) {
+  return operator==(rhs, lhs);
+}
+inline bool operator!=(const error_condition & lhs, const error_code & rhs) {
+  return !operator==(lhs, rhs);
+}
+
+} // namespace MaximInterface
+
+#endif