Add support to non-short floating point conversion to string

Author: qunaibit

graalpython/com.oracle.graal.python.cext/include/internal/pycore_dtoa.h

@@ -0,0 +1,28 @@
+/* Copyright (c) 2023, Oracle and/or its affiliates.
+ * Copyright (C) 1996-2022 Python Software Foundation
+ *
+ * Licensed under the PYTHON SOFTWARE FOUNDATION LICENSE VERSION 2
+ */
+#ifndef PY_NO_SHORT_FLOAT_REPR
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef Py_BUILD_CORE
+#  error "this header requires Py_BUILD_CORE define"
+#endif
+
+/* These functions are used by modules compiled as C extension like math:
+   they must be exported. */
+
+PyAPI_FUNC(double) _Py_dg_strtod(const char *str, char **ptr);
+PyAPI_FUNC(char *) _Py_dg_dtoa(double d, int mode, int ndigits,
+                        int *decpt, int *sign, char **rve);
+PyAPI_FUNC(void) _Py_dg_freedtoa(char *s);
+PyAPI_FUNC(double) _Py_dg_stdnan(int sign);
+PyAPI_FUNC(double) _Py_dg_infinity(int sign);
+
+#ifdef __cplusplus
+}
+#endif
+#endif   /* !PY_NO_SHORT_FLOAT_REPR */

graalpython/com.oracle.graal.python.cext/include/pyconfig.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2017, 2022, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 2017, 2023, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * The Universal Permissive License (UPL), Version 1.0
@@ -145,5 +145,13 @@
 #define NT_THREADS 1
 #endif
 
+// The following should have been generated using `configure` command,
+// but instead, are set manully for the time being.
+
+/* Define if C doubles are 64-bit IEEE 754 binary format, stored with the
+   least significant byte first */
+#define DOUBLE_IS_LITTLE_ENDIAN_IEEE754 1
+
+
 #endif /*Py_PYCONFIG_H*/