bpo-36301: Add _PyWstrList structure (GH-12343)

Replace messy _Py_wstrlist_xxx() functions with a new clean
_PyWstrList structure and new _PyWstrList_xxx() functions.

Changes:

* Add _PyCoreConfig.use_module_search_paths to decide if
  _PyCoreConfig.module_search_paths should be computed or not, to
  support empty search path list.
* _PyWstrList_Clear() sets length to 0 and items to NULL, whereas
  _Py_wstrlist_clear() only freed memory.
* _PyWstrList_Append() returns an int, whereas _Py_wstrlist_append()
  returned _PyInitError.
* _PyWstrList uses Py_ssize_t for the length, instead of int.
* Replace (int, wchar_t**) with _PyWstrList in:

  * _PyPreConfig
  * _PyCoreConfig
  * _PyPreCmdline
  * _PyCmdline

* Replace "int orig_argv; wchar_t **orig_argv;"
  with "_PyWstrList orig_argv".
* _PyCmdline and _PyPreCmdline now also copy wchar_argv.
* Rename _PyArgv_Decode() to _PyArgv_AsWstrList().
* PySys_SetArgvEx() now pass the fixed (argc, argv) to
  _PyPathConfig_ComputeArgv0() (don't pass negative argc or NULL
  argv).
* _PyOS_GetOpt() uses Py_ssize_t

1 files changed, 6 insertions, 6 deletions

diff --git a/Programs/_testembed.c b/Programs/_testembed.c
index bba2510..7c143f1 100644
--- a/Programs/_testembed.c
+++ b/Programs/_testembed.c
@@ -479,8 +479,8 @@ static int test_init_from_config(void)
         L"-c",
         L"pass",
     };
-    config.argc = Py_ARRAY_LENGTH(argv);
-    config.argv = argv;
+    config.argv.length = Py_ARRAY_LENGTH(argv);
+    config.argv.items = argv;
 
     config.program = L"conf_program";
 
@@ -489,15 +489,15 @@ static int test_init_from_config(void)
         L"core_xoption2=",
         L"core_xoption3",
     };
-    config.nxoption = Py_ARRAY_LENGTH(xoptions);
-    config.xoptions = xoptions;
+    config.xoptions.length = Py_ARRAY_LENGTH(xoptions);
+    config.xoptions.items = xoptions;
 
     static wchar_t* warnoptions[2] = {
         L"default",
         L"error::ResourceWarning",
     };
-    config.nwarnoption = Py_ARRAY_LENGTH(warnoptions);
-    config.warnoptions = warnoptions;
+    config.warnoptions.length = Py_ARRAY_LENGTH(warnoptions);
+    config.warnoptions.items = warnoptions;
 
     /* FIXME: test module_search_path_env */
     /* FIXME: test home */