Stefan Scholz
Containers (STL-compatible) StateMachines MessageBus and more for Embedded Systems. See www.etlcpp.com
Diff: largest_generator.h
- Revision:
- 0:b47c2a7920c2
--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/largest_generator.h Fri Mar 16 16:34:18 2018 +0000
@@ -0,0 +1,302 @@
+///\file
+
+/******************************************************************************
+The MIT License(MIT)
+
+Embedded Template Library.
+https://github.com/ETLCPP/etl
+https://www.etlcpp.com
+
+Copyright(c) 2014 jwellbelove
+
+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 THE
+AUTHORS OR COPYRIGHT HOLDERS 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.
+******************************************************************************/
+
+/*[[[cog
+import cog
+cog.outl("#if 0")
+]]]*/
+/*[[[end]]]*/
+#error THIS HEADER IS A GENERATOR. DO NOT INCLUDE.
+/*[[[cog
+import cog
+cog.outl("#endif")
+]]]*/
+/*[[[end]]]*/
+
+/*[[[cog
+import cog
+cog.outl("//***************************************************************************")
+cog.outl("// This file has been auto generated. Do not edit this file.")
+cog.outl("//***************************************************************************")
+]]]*/
+/*[[[end]]]*/
+
+//***************************************************************************
+// To generate to header file, run this at the command line.
+// Note: You will need Python and COG installed.
+//
+// python -m cogapp -d -e -olargest.h -DNTypes=<n> largest_generator.h
+// Where <n> is the number of types to support.
+//
+// e.g.
+// To generate handlers for up to 16 types...
+// python -m cogapp -d -e -olargest.h -DNTypes=16 largest_generator.h
+//
+// See generate.bat
+//***************************************************************************
+
+#ifndef __ETL_LARGEST__
+#define __ETL_LARGEST__
+
+///\defgroup largest largest
+///\ingroup utilities
+
+#include "platform.h"
+#include "type_traits.h"
+#include "smallest.h"
+#include "static_assert.h"
+
+namespace etl
+{
+ /*[[[cog
+ import cog
+ cog.outl("//***************************************************************************")
+ cog.outl("/// Template to determine the largest type and size.")
+ cog.outl("/// Supports up to %s types." % NTypes)
+ cog.outl("/// Defines 'value_type' which is the type of the largest parameter.")
+ cog.outl("/// Defines 'size' which is the size of the largest parameter.")
+ cog.outl("///\ingroup largest")
+ cog.outl("//***************************************************************************")
+ cog.out("template <typename T1, ")
+ for n in range(2, int(NTypes)):
+ cog.out("typename T%s = void, " % n)
+ if n % 4 == 0:
+ cog.outl("")
+ cog.out(" ")
+ cog.outl("typename T%s = void>" % int(NTypes))
+ cog.outl("struct largest_type")
+ cog.outl("{")
+ cog.outl(" // Define 'largest_other' as 'largest_type' with all but the first parameter. ")
+ cog.out(" typedef typename largest_type<")
+ for n in range(2, int(NTypes)):
+ cog.out("T%s, " % n)
+ if n % 16 == 0:
+ cog.outl("")
+ cog.out(" ")
+ cog.outl("T%s>::type largest_other;" % int(NTypes))
+ cog.outl("")
+ cog.outl(" // Set 'type' to be the largest of the first parameter and any of the others.")
+ cog.outl(" // This is recursive.")
+ cog.outl(" typedef typename etl::conditional<(sizeof(T1) > sizeof(largest_other)), // Boolean")
+ cog.outl(" T1, // TrueType")
+ cog.outl(" largest_other> // FalseType")
+ cog.outl(" ::type type; // The largest type of the two.")
+ cog.outl("")
+ cog.outl(" // The size of the largest type.")
+ cog.outl(" enum")
+ cog.outl(" {")
+ cog.outl(" size = sizeof(type)")
+ cog.outl(" };")
+ cog.outl("};")
+ cog.outl("")
+ cog.outl("//***************************************************************************")
+ cog.outl("// Specialisation for one template parameter.")
+ cog.outl("//***************************************************************************")
+ cog.outl("template <typename T1>")
+ cog.out("struct largest_type<T1, ")
+ for n in range(2, int(NTypes)):
+ cog.out("void, ")
+ if n % 8 == 0:
+ cog.outl("")
+ cog.out(" ")
+ cog.outl("void>")
+ cog.outl("{")
+ cog.outl(" typedef T1 type;")
+ cog.outl("")
+ cog.outl(" enum")
+ cog.outl(" {")
+ cog.outl(" size = sizeof(type)")
+ cog.outl(" };")
+ cog.outl("};")
+ ]]]*/
+ /*[[[end]]]*/
+
+ /*[[[cog
+ import cog
+ cog.outl("//***************************************************************************")
+ cog.outl("/// Template to determine the largest alignment.")
+ cog.outl("/// Supports up to %s types." % int(NTypes))
+ cog.outl("/// Defines <b>value</b> which is the largest alignment of all the parameters.")
+ cog.outl("///\ingroup largest")
+ cog.outl("//***************************************************************************")
+ cog.out("template <typename T1, ")
+ for n in range(2, int(NTypes)):
+ cog.out("typename T%s = void, " % n)
+ if n % 4 == 0:
+ cog.outl("")
+ cog.out(" ")
+ cog.outl("typename T%s = void>" % int(NTypes))
+ cog.outl("struct largest_alignment")
+ cog.outl("{")
+ cog.outl(" // Define 'largest_other' as 'largest_type' with all but the first parameter. ")
+ cog.out(" typedef typename largest_alignment<")
+ for n in range(2, int(NTypes)):
+ cog.out("T%s, " % n)
+ if n % 16 == 0:
+ cog.outl("")
+ cog.out(" ")
+ cog.outl("T%s>::type largest_other;" % int(NTypes))
+ cog.outl("")
+ cog.outl(" // Set 'type' to be the largest of the first parameter and any of the others.")
+ cog.outl(" // This is recursive.")
+ cog.outl(" typedef typename etl::conditional<(etl::alignment_of<T1>::value > etl::alignment_of<largest_other>::value), // Boolean")
+ cog.outl(" T1, // TrueType")
+ cog.outl(" largest_other> // FalseType")
+ cog.outl(" ::type type; // The largest type of the two.")
+ cog.outl("")
+ cog.outl(" // The largest alignment.")
+ cog.outl(" enum")
+ cog.outl(" {")
+ cog.outl(" value = etl::alignment_of<type>::value")
+ cog.outl(" };")
+ cog.outl("};")
+ cog.outl("")
+ cog.outl("//***************************************************************************")
+ cog.outl("// Specialisation for one template parameter.")
+ cog.outl("//***************************************************************************")
+ cog.outl("template <typename T1>")
+ cog.out("struct largest_alignment<T1, ")
+ for n in range(2, int(NTypes)):
+ cog.out("void, ")
+ if n % 8 == 0:
+ cog.outl("")
+ cog.out(" ")
+ cog.outl("void>")
+ cog.outl("{")
+ cog.outl(" typedef T1 type;")
+ cog.outl("")
+ cog.outl(" enum")
+ cog.outl(" {")
+ cog.outl(" value = etl::alignment_of<type>::value")
+ cog.outl(" };")
+ cog.outl("};")
+ ]]]*/
+ /*[[[end]]]*/
+
+ //***************************************************************************
+ /// Defines a type that is as larger or larger than the specified type.
+ /// Will return the specified type is there is not a larger type.
+ ///\ingroup largest
+ //***************************************************************************
+ template <typename T>
+ struct larger_int_type
+ {
+ STATIC_ASSERT(etl::is_integral<T>::value, "Must be an integral type");
+
+ typedef typename etl::smallest_int_for_bits<etl::integral_limits<typename etl::make_signed<T>::type>::bits + 1>::type type;
+ };
+
+ //***************************************************************************
+ /// Defines a type that is as larger or larger than the specified type.
+ /// Will return the specified type is there is not a larger type.
+ ///\ingroup largest
+ //***************************************************************************
+ template <typename T>
+ struct larger_uint_type
+ {
+ STATIC_ASSERT(etl::is_integral<T>::value, "Must be an integral type");
+
+ typedef typename etl::smallest_uint_for_bits<etl::integral_limits<typename etl::make_unsigned<T>::type>::bits + 1>::type type;
+ };
+
+ //***************************************************************************
+ /// Defines a type that is as larger or larger than the specified type.
+ /// Will return the specified type is there is not a larger type.
+ /// The returned type will be of the same sign.
+ ///\ingroup largest
+ //***************************************************************************
+ template <typename T, bool IS_SIGNED = etl::is_signed<T>::value>
+ struct larger_type;
+
+ template <typename T>
+ struct larger_type<T, false>
+ {
+ STATIC_ASSERT(etl::is_integral<T>::value, "Must be an integral type");
+
+ typedef typename etl::smallest_uint_for_bits<etl::integral_limits<T>::bits + 1>::type type;
+ };
+
+ template <typename T>
+ struct larger_type<T, true>
+ {
+ STATIC_ASSERT(etl::is_integral<T>::value, "Must be an integral type");
+
+ typedef typename etl::smallest_int_for_bits<etl::integral_limits<T>::bits + 1>::type type;
+ };
+
+ /*[[[cog
+ import cog
+ cog.outl("//***************************************************************************")
+ cog.outl("/// Template to determine the largest type, size and alignment.")
+ cog.outl("/// Supports up to %s types." % NTypes)
+ cog.outl("/// Defines <b>value</b> which is the largest type, size and alignment of all the parameters.")
+ cog.outl("///\ingroup largest")
+ cog.outl("//***************************************************************************")
+ cog.out("template <typename T1, ")
+ for n in range(2, int(NTypes)):
+ cog.out("typename T%s = void, " % n)
+ if n % 4 == 0:
+ cog.outl("")
+ cog.out(" ")
+ cog.outl("typename T%s = void>" % NTypes)
+ cog.outl("struct largest")
+ cog.outl("{")
+ cog.out(" typedef typename etl::largest_type<")
+ for n in range(1, int(NTypes)):
+ cog.out("T%s, " % n)
+ if n % 16 == 0:
+ cog.outl("")
+ cog.out(" ")
+ cog.outl("T%s>::type type;" % NTypes)
+ cog.outl("")
+ cog.outl(" enum")
+ cog.outl(" {")
+ cog.out(" size = etl::largest_type<")
+ for n in range(1, int(NTypes)):
+ cog.out("T%s, " % n)
+ if n % 16 == 0:
+ cog.outl("")
+ cog.out(" ")
+ cog.outl("T%s>::size," % NTypes)
+ cog.out(" alignment = etl::largest_alignment<")
+ for n in range(1, int(NTypes)):
+ cog.out("T%s, " % n)
+ if n % 16 == 0:
+ cog.outl("")
+ cog.out(" ")
+ cog.outl("T%s>::value" % NTypes)
+ cog.outl(" };")
+ cog.outl("};")
+ ]]]*/
+ /*[[[end]]]*/
+}
+
+#endif
+