1 files changed, 73 insertions, 0 deletions
diff --git a/contrib/tools/python3/Include/internal/pycore_dtoa.h b/contrib/tools/python3/Include/internal/pycore_dtoa.h
new file mode 100644
index 0000000000..4d9681d59a
--- /dev/null
+++ b/contrib/tools/python3/Include/internal/pycore_dtoa.h
@@ -0,0 +1,73 @@
+#ifndef Py_INTERNAL_DTOA_H
+#define Py_INTERNAL_DTOA_H
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifndef Py_BUILD_CORE
+#  error "this header requires Py_BUILD_CORE define"
+#endif
+
+#include "pycore_pymath.h"        // _PY_SHORT_FLOAT_REPR
+
+
+#if _PY_SHORT_FLOAT_REPR == 1
+
+typedef uint32_t ULong;
+
+struct
+Bigint {
+    struct Bigint *next;
+    int k, maxwds, sign, wds;
+    ULong x[1];
+};
+
+#ifdef Py_USING_MEMORY_DEBUGGER
+
+struct _dtoa_state {
+    int _not_used;
+};
+#define _dtoa_interp_state_INIT(INTERP) \
+    {0}
+
+#else  // !Py_USING_MEMORY_DEBUGGER
+
+/* The size of the Bigint freelist */
+#define Bigint_Kmax 7
+
+#ifndef PRIVATE_MEM
+#define PRIVATE_MEM 2304
+#endif
+#define Bigint_PREALLOC_SIZE \
+    ((PRIVATE_MEM+sizeof(double)-1)/sizeof(double))
+
+struct _dtoa_state {
+    /* p5s is a linked list of powers of 5 of the form 5**(2**i), i >= 2 */
+    // XXX This should be freed during runtime fini.
+    struct Bigint *p5s;
+    struct Bigint *freelist[Bigint_Kmax+1];
+    double preallocated[Bigint_PREALLOC_SIZE];
+    double *preallocated_next;
+};
+#define _dtoa_state_INIT(INTERP) \
+    { \
+        .preallocated_next = (INTERP)->dtoa.preallocated, \
+    }
+
+#endif  // !Py_USING_MEMORY_DEBUGGER
+
+
+/* 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);
+
+#endif // _PY_SHORT_FLOAT_REPR == 1
+
+#ifdef __cplusplus
+}
+#endif
+#endif /* !Py_INTERNAL_DTOA_H */