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Refactored known type optimization, in anticipation of backporting to 2.6. I'll probably move this code into PyObject_Format, so everyone benefits.

This commit is contained in:
Eric Smith 2008-06-02 14:57:32 +00:00
parent 7cd068baab
commit ba8c028391
1 changed files with 13 additions and 7 deletions
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20
Objects/stringlib/string_format.h
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@ -484,7 +484,7 @@ render_field(PyObject *fieldobj, SubString *format_spec, OutputString *output)
int ok = 0;
PyObject *result = NULL;
PyObject *format_spec_object = NULL;
PyObject *(*formatter)(PyObject *, STRINGLIB_CHAR *, Py_ssize_t) = NULL;
STRINGLIB_CHAR* format_spec_start = format_spec->ptr ?
format_spec->ptr : NULL;
Py_ssize_t format_spec_len = format_spec->ptr ?
@ -493,14 +493,20 @@ render_field(PyObject *fieldobj, SubString *format_spec, OutputString *output)
/* If we know the type exactly, skip the lookup of __format__ and just
call the formatter directly. */
if (PyUnicode_CheckExact(fieldobj))
result = _PyUnicode_FormatAdvanced(fieldobj, format_spec_start,
format_spec_len);
formatter = _PyUnicode_FormatAdvanced;
else if (PyLong_CheckExact(fieldobj))
result = _PyLong_FormatAdvanced(fieldobj, format_spec_start,
format_spec_len);
formatter =_PyLong_FormatAdvanced;
else if (PyFloat_CheckExact(fieldobj))
result = _PyFloat_FormatAdvanced(fieldobj, format_spec_start,
format_spec_len);
formatter = _PyFloat_FormatAdvanced;
/* XXX: for 2.6, convert format_spec to the appropriate type
(unicode, str) */
if (formatter) {
/* we know exactly which formatter will be called when __format__ is
looked up, so call it directly, instead. */
result = formatter(fieldobj, format_spec_start, format_spec_len);
}
else {
/* We need to create an object out of the pointers we have, because
__format__ takes a string/unicode object for format_spec. */