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needforspeed: speed up upper and lower for 8-bit string objects.

Browse source 
(the unicode versions of these are still 2x faster on windows,
though...)

based on work by Andrew Dalke, with tweaks by yours truly.
This commit is contained in:
Fredrik Lundh 2006-05-25 15:22:03 +00:00
parent c620bada3a
commit 39ccef607e
1 changed files with 20 additions and 22 deletions
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42
Objects/stringobject.c
View file

@ -2036,26 +2036,25 @@ Return a copy of the string S converted to lowercase.");
static PyObject *
string_lower(PyStringObject *self)
{
char *s = PyString_AS_STRING(self), *s_new;
char *s;
Py_ssize_t i, n = PyString_GET_SIZE(self);
PyObject *newobj;
newobj = PyString_FromStringAndSize(NULL, n);
if (newobj == NULL)
newobj = PyString_FromStringAndSize(PyString_AS_STRING(self), n);
if (!newobj)
return NULL;
s_new = PyString_AsString(newobj);
s = PyString_AS_STRING(newobj);
for (i = 0; i < n; i++) {
int c = Py_CHARMASK(*s++);
if (isupper(c)) {
*s_new = tolower(c);
} else
*s_new = c;
s_new++;
char c = Py_CHARMASK(s[i]);
if (isupper(c))
s[i] = _tolower(c);
}
return newobj;
}
PyDoc_STRVAR(upper__doc__,
"S.upper() -> string\n\
\n\
@ -2064,26 +2063,25 @@ Return a copy of the string S converted to uppercase.");
static PyObject *
string_upper(PyStringObject *self)
{
char *s = PyString_AS_STRING(self), *s_new;
char *s;
Py_ssize_t i, n = PyString_GET_SIZE(self);
PyObject *newobj;
newobj = PyString_FromStringAndSize(NULL, n);
if (newobj == NULL)
newobj = PyString_FromStringAndSize(PyString_AS_STRING(self), n);
if (!newobj)
return NULL;
s_new = PyString_AsString(newobj);
s = PyString_AS_STRING(newobj);
for (i = 0; i < n; i++) {
int c = Py_CHARMASK(*s++);
if (islower(c)) {
*s_new = toupper(c);
} else
*s_new = c;
s_new++;
char c = Py_CHARMASK(s[i]);
if (islower(c))
s[i] = _toupper(c);
}
return newobj;
}
PyDoc_STRVAR(title__doc__,
"S.title() -> string\n\
\n\