bpo-36142: Add preconfig.c (GH-12128)
* Add _PyArgv_Decode() function
* Move _Py_ClearFileSystemEncoding() and _Py_SetFileSystemEncoding()
to preconfig.c.
diff --git a/Python/preconfig.c b/Python/preconfig.c
new file mode 100644
index 0000000..8102924
--- /dev/null
+++ b/Python/preconfig.c
@@ -0,0 +1,92 @@
+#include "Python.h"
+#include "pycore_coreconfig.h"
+
+
+#define DECODE_LOCALE_ERR(NAME, LEN) \
+ (((LEN) == -2) \
+ ? _Py_INIT_USER_ERR("cannot decode " NAME) \
+ : _Py_INIT_NO_MEMORY())
+
+
+/* --- File system encoding/errors -------------------------------- */
+
+/* The filesystem encoding is chosen by config_init_fs_encoding(),
+ see also initfsencoding(). */
+const char *Py_FileSystemDefaultEncoding = NULL;
+int Py_HasFileSystemDefaultEncoding = 0;
+const char *Py_FileSystemDefaultEncodeErrors = NULL;
+int _Py_HasFileSystemDefaultEncodeErrors = 0;
+
+void
+_Py_ClearFileSystemEncoding(void)
+{
+ if (!Py_HasFileSystemDefaultEncoding && Py_FileSystemDefaultEncoding) {
+ PyMem_RawFree((char*)Py_FileSystemDefaultEncoding);
+ Py_FileSystemDefaultEncoding = NULL;
+ }
+ if (!_Py_HasFileSystemDefaultEncodeErrors && Py_FileSystemDefaultEncodeErrors) {
+ PyMem_RawFree((char*)Py_FileSystemDefaultEncodeErrors);
+ Py_FileSystemDefaultEncodeErrors = NULL;
+ }
+}
+
+
+/* Set Py_FileSystemDefaultEncoding and Py_FileSystemDefaultEncodeErrors
+ global configuration variables. */
+int
+_Py_SetFileSystemEncoding(const char *encoding, const char *errors)
+{
+ char *encoding2 = _PyMem_RawStrdup(encoding);
+ if (encoding2 == NULL) {
+ return -1;
+ }
+
+ char *errors2 = _PyMem_RawStrdup(errors);
+ if (errors2 == NULL) {
+ PyMem_RawFree(encoding2);
+ return -1;
+ }
+
+ _Py_ClearFileSystemEncoding();
+
+ Py_FileSystemDefaultEncoding = encoding2;
+ Py_HasFileSystemDefaultEncoding = 0;
+
+ Py_FileSystemDefaultEncodeErrors = errors2;
+ _Py_HasFileSystemDefaultEncodeErrors = 0;
+ return 0;
+}
+
+
+/* --- _PyArgv ---------------------------------------------------- */
+
+_PyInitError
+_PyArgv_Decode(const _PyArgv *args, wchar_t*** argv_p)
+{
+ wchar_t** argv;
+ if (args->use_bytes_argv) {
+ /* +1 for a the NULL terminator */
+ size_t size = sizeof(wchar_t*) * (args->argc + 1);
+ argv = (wchar_t **)PyMem_RawMalloc(size);
+ if (argv == NULL) {
+ return _Py_INIT_NO_MEMORY();
+ }
+
+ for (int i = 0; i < args->argc; i++) {
+ size_t len;
+ wchar_t *arg = Py_DecodeLocale(args->bytes_argv[i], &len);
+ if (arg == NULL) {
+ _Py_wstrlist_clear(i, argv);
+ return DECODE_LOCALE_ERR("command line arguments",
+ (Py_ssize_t)len);
+ }
+ argv[i] = arg;
+ }
+ argv[args->argc] = NULL;
+ }
+ else {
+ argv = args->wchar_argv;
+ }
+ *argv_p = argv;
+ return _Py_INIT_OK();
+}