From 7cb42f4368e873e5930cf84bc2494a8e8172a046 Mon Sep 17 00:00:00 2001
From: Miodrag Milanovic <mmicko@gmail.com>
Date: Tue, 5 Jun 2018 21:03:06 +0200
Subject: Initial GUI work

---
 common/handle_error.cc | 56 ++++++++++++++++++++++++++++++++++++++++++++++++++
 common/pybindings.cc   | 42 +++++++++++++++++++++++++++++++++++++
 common/pybindings.h    |  3 +++
 common/version.h.in    |  6 ++++++
 4 files changed, 107 insertions(+)
 create mode 100644 common/handle_error.cc
 create mode 100644 common/version.h.in

(limited to 'common')

diff --git a/common/handle_error.cc b/common/handle_error.cc
new file mode 100644
index 00000000..a06b5348
--- /dev/null
+++ b/common/handle_error.cc
@@ -0,0 +1,56 @@
+#include <boost/python.hpp>
+#include <Python.h>
+
+namespace py = boost::python;
+
+// Parses the value of the active python exception
+// NOTE SHOULD NOT BE CALLED IF NO EXCEPTION
+std::string parse_python_exception(){
+    PyObject *type_ptr = NULL, *value_ptr = NULL, *traceback_ptr = NULL;
+    // Fetch the exception info from the Python C API
+    PyErr_Fetch(&type_ptr, &value_ptr, &traceback_ptr);
+
+    // Fallback error
+    std::string ret("Unfetchable Python error");
+    // If the fetch got a type pointer, parse the type into the exception string
+    if(type_ptr != NULL){
+        py::handle<> h_type(type_ptr);
+        py::str type_pstr(h_type);
+        // Extract the string from the boost::python object
+        py::extract<std::string> e_type_pstr(type_pstr);
+        // If a valid string extraction is available, use it 
+        //  otherwise use fallback
+        if(e_type_pstr.check())
+            ret = e_type_pstr();
+        else
+            ret = "Unknown exception type";
+    }
+    // Do the same for the exception value (the stringification of the exception)
+    if(value_ptr != NULL){
+        py::handle<> h_val(value_ptr);
+        py::str a(h_val);
+        py::extract<std::string> returned(a);
+        if(returned.check())
+            ret +=  ": " + returned();
+        else
+            ret += std::string(": Unparseable Python error: ");
+    }
+    // Parse lines from the traceback using the Python traceback module
+    if(traceback_ptr != NULL){
+        py::handle<> h_tb(traceback_ptr);
+        // Load the traceback module and the format_tb function
+        py::object tb(py::import("traceback"));
+        py::object fmt_tb(tb.attr("format_tb"));
+        // Call format_tb to get a list of traceback strings
+        py::object tb_list(fmt_tb(h_tb));
+        // Join the traceback strings into a single string
+        py::object tb_str(py::str("\n").join(tb_list));
+        // Extract the string, check the extraction, and fallback in necessary
+        py::extract<std::string> returned(tb_str);
+        if(returned.check())
+            ret += ": " + returned();
+        else
+            ret += std::string(": Unparseable Python traceback");
+    }
+    return ret;
+}
diff --git a/common/pybindings.cc b/common/pybindings.cc
index 8bae4e51..4986c549 100644
--- a/common/pybindings.cc
+++ b/common/pybindings.cc
@@ -18,6 +18,7 @@
  *
  */
 
+
 #include "design.h"
 #include "chip.h"
 #include "pybindings.h"
@@ -26,6 +27,9 @@
 #define PASTER(x, y) x ## _ ## y
 #define EVALUATOR(x, y)  PASTER(x,y)
 #define MODULE_NAME EVALUATOR(nextpnrpy, ARCHNAME)
+#define PYINIT_MODULE_NAME EVALUATOR(&PyInit_nextpnrpy, ARCHNAME)
+#define STRINGIFY(x) #x
+#define TOSTRING(x) STRINGIFY(x)
 
 // Architecture-specific bindings should be created in the below function, which must be implemented in all
 // architectures
@@ -39,3 +43,41 @@ BOOST_PYTHON_MODULE (MODULE_NAME) {
 
     arch_wrap_python();
 }
+
+void arch_appendinittab()
+{
+    PyImport_AppendInittab(TOSTRING(MODULE_NAME), PYINIT_MODULE_NAME);
+}
+
+void execute_python_file(const char *executable, const char* python_file)
+{
+    wchar_t *program = Py_DecodeLocale(executable, NULL);
+    if (program == NULL) {
+        fprintf(stderr, "Fatal error: cannot decode executable filename\n");
+        exit(1);
+    }
+    try 
+    {		
+        PyImport_AppendInittab(TOSTRING(MODULE_NAME), PYINIT_MODULE_NAME);
+        Py_SetProgramName(program);
+        Py_Initialize();
+
+        FILE* fp = fopen(python_file, "r");	
+        if (fp == NULL) {
+            fprintf(stderr, "Fatal error: file not found %s\n",python_file);
+            exit(1);
+        }
+        PyRun_SimpleFile(fp , python_file);
+        fclose(fp);
+
+        Py_Finalize();
+        PyMem_RawFree(program);
+    } 
+    catch(boost::python::error_already_set const &)
+    {
+        // Parse and output the exception
+        std::string perror_str = parse_python_exception();
+        std::cout << "Error in Python: " << perror_str << std::endl;
+    }
+}
+
diff --git a/common/pybindings.h b/common/pybindings.h
index eab2039d..f594784c 100644
--- a/common/pybindings.h
+++ b/common/pybindings.h
@@ -79,5 +79,8 @@ struct range_wrapper {
 
 #define WRAP_RANGE(t) range_wrapper<t##Range>().wrap(#t "Range", #t "Iterator")
 
+void execute_python_file(const char *executable, const char* python_file);
+std::string parse_python_exception();
+void arch_appendinittab();
 
 #endif /* end of include guard: COMMON_PYBINDINGS_HH */
diff --git a/common/version.h.in b/common/version.h.in
new file mode 100644
index 00000000..8072116b
--- /dev/null
+++ b/common/version.h.in
@@ -0,0 +1,6 @@
+#ifndef VERSION_H
+#define VERSION_H
+
+#define GIT_COMMIT_HASH_STR "@GIT_COMMIT_HASH@"
+
+#endif
\ No newline at end of file
-- 
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