[cmake] Change directory structure for cpp2py library to match app4triqs

Author: Wentzell

CMakeLists.txt

@@ -51,8 +51,10 @@ MESSAGE(STATUS "LibClang additional flags: ${LIBCLANG_CXX_FLAGS}")
 set(LIBCLANG_CXX_FLAGS "${LIBCLANG_CXX_FLAGS}" CACHE STRING "Additional flags to be passed to libclang when parsing with clang")
 set(LIBCLANG_LOCATION "${LIBCLANG_LOCATION}" CACHE STRING "Location of the libclang library")
 
-# Detect Python
+# --- Python ---
+
 find_package(Python)
+add_library(cpp2py::python_and_numpy ALIAS python_and_numpy)
 install(TARGETS python_and_numpy EXPORT cpp2py-targets)
 
 # find_package(Python3 COMPONENTS Development Interpreter)
@@ -74,8 +76,7 @@ install(TARGETS python_and_numpy EXPORT cpp2py-targets)
 # subdirs
 add_subdirectory(bin)            # Executables
 add_subdirectory(cmake)          # Exported Cpp2Py-Config
-add_subdirectory(include)
-add_subdirectory(lib)
+add_subdirectory(c++/cpp2py)
 
 # The python modules
 add_subdirectory(cpp2py)

c++/cpp2py/CMakeLists.txt

@@ -0,0 +1,22 @@
+add_library(cpp2py signal_handler.cpp exceptions.cpp)
+add_library(cpp2py::cpp2py ALIAS cpp2py)
+
+target_compile_options(cpp2py PRIVATE -std=c++14 -fPIC)
+target_include_directories(cpp2py
+  PUBLIC
+  	$<INSTALL_INTERFACE:${CMAKE_INSTALL_PREFIX}/c++>
+	$<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/c++>
+  )
+
+# Install the library in lib and export the cpp2py target
+install(TARGETS cpp2py EXPORT cpp2py-targets DESTINATION lib)
+install(DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR} DESTINATION include FILES_MATCHING PATTERN "*.hpp" PATTERN "*.h" PATTERN "*.hxx")
+
+# --- Python ---
+
+target_link_libraries(cpp2py PUBLIC python_and_numpy)
+
+# ---------------
+
+# Install the exported targets
+install(EXPORT cpp2py-targets NAMESPACE cpp2py:: DESTINATION lib/cmake/cpp2py)

include/cpp2py/converters/basic_types.hpp renamed to c++/cpp2py/converters/basic_types.hpp

@@ -29,6 +29,19 @@ namespace cpp2py {
     }
   };
 
+  template <> struct py_converter<unsigned char> {
+
+    static PyObject *c2py(unsigned char c) { return PyBytes_FromStringAndSize(reinterpret_cast<char *>(&c), 1); }
+
+    static unsigned char py2c(PyObject *ob) { return static_cast<unsigned char>(PyBytes_AsString(ob)[0]); }
+
+    static bool is_convertible(PyObject *ob, bool raise_exception) {
+      if (PyBytes_Check(ob) and PyBytes_Size(ob) == 1) return true;
+      if (raise_exception) { PyErr_SetString(PyExc_TypeError, "Cannot convert to unsigned char"); }
+      return false;
+    }
+  };
+
   template <> struct py_converter<const char *> {
 
     static PyObject *c2py(const char *x) { return PyUnicode_FromString(x); }

include/cpp2py/converters/complex.hpp renamed to c++/cpp2py/converters/complex.hpp

@@ -85,7 +85,7 @@ macro(add_cpp2py_module)
     COMMAND PYTHONPATH=${PROJECT_BINARY_DIR}:${PROJECT_BINARY_DIR}/python:${CPP2PY_ADD_MODULE_ADDITIONAL_PYTHONPATH}:$ENV{PYTHONPATH} ${CPP2PY_PYTHON_EXECUTABLE} ${desc_name} ${wrap_name})
 
   add_library(${module_name} MODULE ${wrap_name})
-  target_link_libraries(${module_name} cpp2py)
+  target_link_libraries(${module_name} cpp2py::cpp2py)
 
   set_target_properties(${module_name}
     PROPERTIES

include/cpp2py/converters/function.hpp renamed to c++/cpp2py/converters/function.hpp

@@ -5,7 +5,7 @@
 using dcomplex = std::complex<double>;
 
 // first the basic stuff
-#include <cpp2py.hpp>
+#include <cpp2py/cpp2py.hpp>
 #include <cpp2py/converters/string.hpp>
 
 // for converters
@@ -111,7 +111,7 @@ template <> struct py_converter<${c_name_absolute}> {
    if (raise_exception) {
     auto err = "Convertion of C++ enum ${c_name_absolute} : \nThe string \"" + s +"\" is not in [${','.join([str(x) for x in values])}]";
     PyErr_SetString(PyExc_ValueError, err.c_str());
-#include <cpp2py.hpp>
+#include <cpp2py/cpp2py.hpp>
    }
    return false;
  }