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Issue #29029: Speed up processing positional arguments in 

PyArg_ParseTupleAndKeywords(), _PyArg_ParseTupleAndKeywordsFast() and like.
This commit is contained in:
Serhiy Storchaka 2017-01-17 10:07:25 +02:00
parent f6b96c7bb5
commit 1741441649
1 changed files with 91 additions and 103 deletions
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158
Python/getargs.c
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@ -1598,7 +1598,7 @@ vgetargskeywords(PyObject *args, PyObject *kwargs, const char *format,
{ {
char msgbuf[512]; char msgbuf[512];
int levels[32]; int levels[32];
const char *fname, *msg, *custom_msg, *keyword; const char *fname, *msg, *custom_msg;
int min = INT_MAX; int min = INT_MAX;
int max = INT_MAX; int max = INT_MAX;
int i, pos, len; int i, pos, len;
@ -1666,7 +1666,6 @@ vgetargskeywords(PyObject *args, PyObject *kwargs, const char *format,
/* convert tuple args and keyword args in same loop, using kwlist to drive process */ /* convert tuple args and keyword args in same loop, using kwlist to drive process */
for (i = 0; i < len; i++) { for (i = 0; i < len; i++) {
keyword = kwlist[i];
if (*format == '|') { if (*format == '|') {
if (min != INT_MAX) { if (min != INT_MAX) {
PyErr_SetString(PyExc_SystemError, PyErr_SetString(PyExc_SystemError,
@ -1720,26 +1719,17 @@ vgetargskeywords(PyObject *args, PyObject *kwargs, const char *format,
return cleanreturn(0, &freelist); return cleanreturn(0, &freelist);
} }
if (!skip) { if (!skip) {
current_arg = NULL;
if (nkwargs && i >= pos) {
current_arg = PyDict_GetItemString(kwargs, keyword);
if (!current_arg && PyErr_Occurred()) {
return cleanreturn(0, &freelist);
}
}
if (current_arg) {
--nkwargs;
if (i < nargs) { if (i < nargs) {
/* arg present in tuple and in dict */
PyErr_Format(PyExc_TypeError,
"Argument given by name ('%s') "
"and position (%d)",
keyword, i+1);
return cleanreturn(0, &freelist);
}
}
else if (i < nargs)
current_arg = PyTuple_GET_ITEM(args, i); current_arg = PyTuple_GET_ITEM(args, i);
}
else if (nkwargs && i >= pos) {
current_arg = PyDict_GetItemString(kwargs, kwlist[i]);
if (current_arg)
--nkwargs;
}
else {
current_arg = NULL;
}
if (current_arg) { if (current_arg) {
msg = convertitem(current_arg, &format, p_va, flags, msg = convertitem(current_arg, &format, p_va, flags,
@ -1764,7 +1754,7 @@ vgetargskeywords(PyObject *args, PyObject *kwargs, const char *format,
else { else {
PyErr_Format(PyExc_TypeError, "Required argument " PyErr_Format(PyExc_TypeError, "Required argument "
"'%s' (pos %d) not found", "'%s' (pos %d) not found",
keyword, i+1); kwlist[i], i+1);
return cleanreturn(0, &freelist); return cleanreturn(0, &freelist);
} }
} }
@ -1803,19 +1793,32 @@ vgetargskeywords(PyObject *args, PyObject *kwargs, const char *format,
return cleanreturn(0, &freelist); return cleanreturn(0, &freelist);
} }
/* make sure there are no extraneous keyword arguments */
if (nkwargs > 0) { if (nkwargs > 0) {
PyObject *key, *value; PyObject *key;
Py_ssize_t pos = 0; Py_ssize_t j;
while (PyDict_Next(kwargs, &pos, &key, &value)) { /* make sure there are no arguments given by name and position */
for (i = pos; i < nargs; i++) {
current_arg = PyDict_GetItemString(kwargs, kwlist[i]);
if (current_arg) {
/* arg present in tuple and in dict */
PyErr_Format(PyExc_TypeError,
"Argument given by name ('%s') "
"and position (%d)",
kwlist[i], i+1);
return cleanreturn(0, &freelist);
}
}
/* make sure there are no extraneous keyword arguments */
j = 0;
while (PyDict_Next(kwargs, &j, &key, NULL)) {
int match = 0; int match = 0;
if (!PyUnicode_Check(key)) { if (!PyUnicode_Check(key)) {
PyErr_SetString(PyExc_TypeError, PyErr_SetString(PyExc_TypeError,
"keywords must be strings"); "keywords must be strings");
return cleanreturn(0, &freelist); return cleanreturn(0, &freelist);
} }
for (i = 0; i < len; i++) { for (i = pos; i < len; i++) {
if (*kwlist[i] && _PyUnicode_EqualToASCIIString(key, kwlist[i])) { if (_PyUnicode_EqualToASCIIString(key, kwlist[i])) {
match = 1; match = 1;
break; break;
} }
@ -1963,10 +1966,13 @@ parser_clear(struct _PyArg_Parser *parser)
} }
static PyObject* static PyObject*
find_keyword(PyObject *kwnames, PyObject **kwstack, PyObject *key) find_keyword(PyObject *kwargs, PyObject *kwnames, PyObject **kwstack, PyObject *key)
{ {
Py_ssize_t i, nkwargs; Py_ssize_t i, nkwargs;
if (kwargs != NULL) {
return PyDict_GetItem(kwargs, key);
}
nkwargs = PyTuple_GET_SIZE(kwnames); nkwargs = PyTuple_GET_SIZE(kwnames);
for (i=0; i < nkwargs; i++) { for (i=0; i < nkwargs; i++) {
PyObject *kwname = PyTuple_GET_ITEM(kwnames, i); PyObject *kwname = PyTuple_GET_ITEM(kwnames, i);
@ -1978,7 +1984,7 @@ find_keyword(PyObject *kwnames, PyObject **kwstack, PyObject *key)
} }
if (!PyUnicode_Check(kwname)) { if (!PyUnicode_Check(kwname)) {
/* ignore non-string keyword keys: /* ignore non-string keyword keys:
an error will be raised above */ an error will be raised below */
continue; continue;
} }
if (_PyUnicode_EQ(kwname, key)) { if (_PyUnicode_EQ(kwname, key)) {
@ -2012,8 +2018,7 @@ vgetargskeywordsfast_impl(PyObject **args, Py_ssize_t nargs,
freelist.entries_malloced = 0; freelist.entries_malloced = 0;
assert(kwargs == NULL || PyDict_Check(kwargs)); assert(kwargs == NULL || PyDict_Check(kwargs));
assert((kwargs != NULL || kwnames != NULL) assert(kwargs == NULL || kwnames == NULL);
|| (kwargs == NULL && kwnames == NULL));
assert(p_va != NULL); assert(p_va != NULL);
if (parser == NULL) { if (parser == NULL) {
@ -2074,7 +2079,6 @@ vgetargskeywordsfast_impl(PyObject **args, Py_ssize_t nargs,
format = parser->format; format = parser->format;
/* convert tuple args and keyword args in same loop, using kwtuple to drive process */ /* convert tuple args and keyword args in same loop, using kwtuple to drive process */
for (i = 0; i < len; i++) { for (i = 0; i < len; i++) {
keyword = (i >= pos) ? PyTuple_GET_ITEM(kwtuple, i - pos) : NULL;
if (*format == '|') { if (*format == '|') {
format++; format++;
} }
@ -2083,31 +2087,17 @@ vgetargskeywordsfast_impl(PyObject **args, Py_ssize_t nargs,
} }
assert(!IS_END_OF_FORMAT(*format)); assert(!IS_END_OF_FORMAT(*format));
current_arg = NULL; if (i < nargs) {
if (nkwargs && i >= pos) { current_arg = args[i];
if (kwargs != NULL) {
current_arg = PyDict_GetItem(kwargs, keyword);
if (!current_arg && PyErr_Occurred()) {
return cleanreturn(0, &freelist);
} }
else if (nkwargs && i >= pos) {
keyword = PyTuple_GET_ITEM(kwtuple, i - pos);
current_arg = find_keyword(kwargs, kwnames, kwstack, keyword);
if (current_arg)
--nkwargs;
} }
else { else {
current_arg = find_keyword(kwnames, kwstack, keyword); current_arg = NULL;
}
}
if (current_arg) {
--nkwargs;
if (i < nargs) {
/* arg present in tuple and in dict */
PyErr_Format(PyExc_TypeError,
"Argument given by name ('%U') "
"and position (%d)",
keyword, i+1);
return cleanreturn(0, &freelist);
}
}
else if (i < nargs) {
current_arg = args[i];
} }
if (current_arg) { if (current_arg) {
@ -2123,13 +2113,15 @@ vgetargskeywordsfast_impl(PyObject **args, Py_ssize_t nargs,
if (i < parser->min) { if (i < parser->min) {
/* Less arguments than required */ /* Less arguments than required */
if (i < pos) { if (i < pos) {
Py_ssize_t min = Py_MIN(pos, parser->min);
PyErr_Format(PyExc_TypeError, PyErr_Format(PyExc_TypeError,
"Function takes %s %d positional arguments" "Function takes %s %d positional arguments"
" (%d given)", " (%d given)",
(Py_MIN(pos, parser->min) < parser->max) ? "at least" : "exactly", min < parser->max ? "at least" : "exactly",
Py_MIN(pos, parser->min), nargs); min, nargs);
} }
else { else {
keyword = PyTuple_GET_ITEM(kwtuple, i - pos);
PyErr_Format(PyExc_TypeError, "Required argument " PyErr_Format(PyExc_TypeError, "Required argument "
"'%U' (pos %d) not found", "'%U' (pos %d) not found",
keyword, i+1); keyword, i+1);
@ -2152,57 +2144,53 @@ vgetargskeywordsfast_impl(PyObject **args, Py_ssize_t nargs,
assert(IS_END_OF_FORMAT(*format) || (*format == '|') || (*format == '$')); assert(IS_END_OF_FORMAT(*format) || (*format == '|') || (*format == '$'));
/* make sure there are no extraneous keyword arguments */
if (nkwargs > 0) { if (nkwargs > 0) {
if (kwargs != NULL) { Py_ssize_t j;
PyObject *key, *value; /* make sure there are no arguments given by name and position */
Py_ssize_t pos = 0; for (i = pos; i < nargs; i++) {
while (PyDict_Next(kwargs, &pos, &key, &value)) { keyword = PyTuple_GET_ITEM(kwtuple, i - pos);
int match; current_arg = find_keyword(kwargs, kwnames, kwstack, keyword);
if (!PyUnicode_Check(key)) { if (current_arg) {
PyErr_SetString(PyExc_TypeError, /* arg present in tuple and in dict */
"keywords must be strings");
return cleanreturn(0, &freelist);
}
match = PySequence_Contains(kwtuple, key);
if (match <= 0) {
if (!match) {
PyErr_Format(PyExc_TypeError, PyErr_Format(PyExc_TypeError,
"'%U' is an invalid keyword " "Argument given by name ('%U') "
"argument for this function", "and position (%d)",
key); keyword, i+1);
}
return cleanreturn(0, &freelist); return cleanreturn(0, &freelist);
} }
} }
/* make sure there are no extraneous keyword arguments */
j = 0;
while (1) {
int match;
if (kwargs != NULL) {
if (!PyDict_Next(kwargs, &j, &keyword, NULL))
break;
} }
else { else {
Py_ssize_t j, nkwargs; if (j >= PyTuple_GET_SIZE(kwnames))
break;
keyword = PyTuple_GET_ITEM(kwnames, j);
j++;
}
nkwargs = PyTuple_GET_SIZE(kwnames); if (!PyUnicode_Check(keyword)) {
for (j=0; j < nkwargs; j++) {
PyObject *key = PyTuple_GET_ITEM(kwnames, j);
int match;
if (!PyUnicode_Check(key)) {
PyErr_SetString(PyExc_TypeError, PyErr_SetString(PyExc_TypeError,
"keywords must be strings"); "keywords must be strings");
return cleanreturn(0, &freelist); return cleanreturn(0, &freelist);
} }
match = PySequence_Contains(kwtuple, keyword);
match = PySequence_Contains(kwtuple, key);
if (match <= 0) { if (match <= 0) {
if (!match) { if (!match) {
PyErr_Format(PyExc_TypeError, PyErr_Format(PyExc_TypeError,
"'%U' is an invalid keyword " "'%U' is an invalid keyword "
"argument for this function", "argument for this function",
key); keyword);
} }
return cleanreturn(0, &freelist); return cleanreturn(0, &freelist);
} }
} }
} }
}
return cleanreturn(1, &freelist); return cleanreturn(1, &freelist);
} }