Add asciilib: similar to ucs1, ucs2 and ucs4 library, but specialized to ASCII
ucs1, ucs2 and ucs4 libraries have to scan created substring to find the
maximum character, whereas it is not need to ASCII strings. Because ASCII
strings are common, it is useful to optimize ASCII.
diff --git a/Objects/stringlib/asciilib.h b/Objects/stringlib/asciilib.h
new file mode 100644
index 0000000..935a9c7
--- /dev/null
+++ b/Objects/stringlib/asciilib.h
@@ -0,0 +1,34 @@
+/* this is sort of a hack. there's at least one place (formatting
+ floats) where some stringlib code takes a different path if it's
+ compiled as unicode. */
+#define STRINGLIB_IS_UNICODE 1
+
+#define FASTSEARCH asciilib_fastsearch
+#define STRINGLIB(F) asciilib_##F
+#define STRINGLIB_OBJECT PyUnicodeObject
+#define STRINGLIB_CHAR Py_UCS1
+#define STRINGLIB_TYPE_NAME "unicode"
+#define STRINGLIB_PARSE_CODE "U"
+#define STRINGLIB_EMPTY unicode_empty
+#define STRINGLIB_ISSPACE Py_UNICODE_ISSPACE
+#define STRINGLIB_ISLINEBREAK BLOOM_LINEBREAK
+#define STRINGLIB_ISDECIMAL Py_UNICODE_ISDECIMAL
+#define STRINGLIB_TODECIMAL Py_UNICODE_TODECIMAL
+#define STRINGLIB_TOUPPER Py_UNICODE_TOUPPER
+#define STRINGLIB_TOLOWER Py_UNICODE_TOLOWER
+#define STRINGLIB_FILL Py_UNICODE_FILL
+#define STRINGLIB_STR PyUnicode_1BYTE_DATA
+#define STRINGLIB_LEN PyUnicode_GET_LENGTH
+#define STRINGLIB_NEW unicode_fromascii
+#define STRINGLIB_RESIZE not_supported
+#define STRINGLIB_CHECK PyUnicode_Check
+#define STRINGLIB_CHECK_EXACT PyUnicode_CheckExact
+#define STRINGLIB_GROUPING _PyUnicode_InsertThousandsGrouping
+#define STRINGLIB_GROUPING_LOCALE _PyUnicode_InsertThousandsGroupingLocale
+
+#define STRINGLIB_TOSTR PyObject_Str
+#define STRINGLIB_TOASCII PyObject_ASCII
+
+#define _Py_InsertThousandsGrouping _PyUnicode_ascii_InsertThousandsGrouping
+#define _Py_InsertThousandsGroupingLocale _PyUnicode_ascii_InsertThousandsGroupingLocale
+