cpython/Objects/intobject.c

906 lines
19 KiB
C
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/* Integer object implementation */
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#include "Python.h"
#include <ctype.h>
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long
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PyInt_GetMax(void)
{
return LONG_MAX; /* To initialize sys.maxint */
}
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/* Standard Booleans */
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PyIntObject _Py_ZeroStruct = {
PyObject_HEAD_INIT(&PyInt_Type)
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0
};
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PyIntObject _Py_TrueStruct = {
PyObject_HEAD_INIT(&PyInt_Type)
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1
};
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static PyObject *
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err_ovf(char *msg)
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{
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PyErr_SetString(PyExc_OverflowError, msg);
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return NULL;
}
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/* Integers are quite normal objects, to make object handling uniform.
(Using odd pointers to represent integers would save much space
but require extra checks for this special case throughout the code.)
Since, a typical Python program spends much of its time allocating
and deallocating integers, these operations should be very fast.
Therefore we use a dedicated allocation scheme with a much lower
overhead (in space and time) than straight malloc(): a simple
dedicated free list, filled when necessary with memory from malloc().
*/
#define BLOCK_SIZE 1000 /* 1K less typical malloc overhead */
#define BHEAD_SIZE 8 /* Enough for a 64-bit pointer */
#define N_INTOBJECTS ((BLOCK_SIZE - BHEAD_SIZE) / sizeof(PyIntObject))
struct _intblock {
struct _intblock *next;
PyIntObject objects[N_INTOBJECTS];
};
typedef struct _intblock PyIntBlock;
static PyIntBlock *block_list = NULL;
static PyIntObject *free_list = NULL;
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static PyIntObject *
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fill_free_list(void)
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{
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PyIntObject *p, *q;
/* XXX Int blocks escape the object heap. Use PyObject_MALLOC ??? */
p = (PyIntObject *) PyMem_MALLOC(sizeof(PyIntBlock));
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if (p == NULL)
return (PyIntObject *) PyErr_NoMemory();
((PyIntBlock *)p)->next = block_list;
block_list = (PyIntBlock *)p;
p = &((PyIntBlock *)p)->objects[0];
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q = p + N_INTOBJECTS;
while (--q > p)
q->ob_type = (struct _typeobject *)(q-1);
q->ob_type = NULL;
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return p + N_INTOBJECTS - 1;
}
#ifndef NSMALLPOSINTS
#define NSMALLPOSINTS 100
#endif
#ifndef NSMALLNEGINTS
#define NSMALLNEGINTS 1
#endif
#if NSMALLNEGINTS + NSMALLPOSINTS > 0
/* References to small integers are saved in this array so that they
can be shared.
The integers that are saved are those in the range
-NSMALLNEGINTS (inclusive) to NSMALLPOSINTS (not inclusive).
*/
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static PyIntObject *small_ints[NSMALLNEGINTS + NSMALLPOSINTS];
#endif
#ifdef COUNT_ALLOCS
int quick_int_allocs, quick_neg_int_allocs;
#endif
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PyObject *
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PyInt_FromLong(long ival)
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{
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register PyIntObject *v;
#if NSMALLNEGINTS + NSMALLPOSINTS > 0
if (-NSMALLNEGINTS <= ival && ival < NSMALLPOSINTS &&
(v = small_ints[ival + NSMALLNEGINTS]) != NULL) {
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Py_INCREF(v);
#ifdef COUNT_ALLOCS
if (ival >= 0)
quick_int_allocs++;
else
quick_neg_int_allocs++;
#endif
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return (PyObject *) v;
}
#endif
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if (free_list == NULL) {
if ((free_list = fill_free_list()) == NULL)
return NULL;
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}
/* PyObject_New is inlined */
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v = free_list;
free_list = (PyIntObject *)v->ob_type;
PyObject_INIT(v, &PyInt_Type);
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v->ob_ival = ival;
#if NSMALLNEGINTS + NSMALLPOSINTS > 0
if (-NSMALLNEGINTS <= ival && ival < NSMALLPOSINTS) {
/* save this one for a following allocation */
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Py_INCREF(v);
small_ints[ival + NSMALLNEGINTS] = v;
}
#endif
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return (PyObject *) v;
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}
static void
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int_dealloc(PyIntObject *v)
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{
v->ob_type = (struct _typeobject *)free_list;
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free_list = v;
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}
long
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PyInt_AsLong(register PyObject *op)
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{
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PyNumberMethods *nb;
PyIntObject *io;
long val;
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if (op && PyInt_Check(op))
return PyInt_AS_LONG((PyIntObject*) op);
if (op == NULL || (nb = op->ob_type->tp_as_number) == NULL ||
nb->nb_int == NULL) {
PyErr_SetString(PyExc_TypeError, "an integer is required");
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return -1;
}
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io = (PyIntObject*) (*nb->nb_int) (op);
if (io == NULL)
return -1;
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if (!PyInt_Check(io)) {
PyErr_SetString(PyExc_TypeError,
"nb_int should return int object");
return -1;
}
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val = PyInt_AS_LONG(io);
Py_DECREF(io);
return val;
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}
PyObject *
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PyInt_FromString(char *s, char **pend, int base)
{
char *end;
long x;
char buffer[256]; /* For errors */
if ((base != 0 && base < 2) || base > 36) {
PyErr_SetString(PyExc_ValueError, "int() base must be >= 2 and <= 36");
return NULL;
}
while (*s && isspace(Py_CHARMASK(*s)))
s++;
errno = 0;
if (base == 0 && s[0] == '0')
x = (long) PyOS_strtoul(s, &end, base);
else
x = PyOS_strtol(s, &end, base);
if (end == s || !isalnum(Py_CHARMASK(end[-1])))
goto bad;
while (*end && isspace(Py_CHARMASK(*end)))
end++;
if (*end != '\0') {
bad:
sprintf(buffer, "invalid literal for int(): %.200s", s);
PyErr_SetString(PyExc_ValueError, buffer);
return NULL;
}
else if (errno != 0) {
sprintf(buffer, "int() literal too large: %.200s", s);
PyErr_SetString(PyExc_ValueError, buffer);
return NULL;
}
if (pend)
*pend = end;
return PyInt_FromLong(x);
}
Marc-Andre's third try at this bulk patch seems to work (except that his copy of test_contains.py seems to be broken -- the lines he deleted were already absent). Checkin messages: New Unicode support for int(), float(), complex() and long(). - new APIs PyInt_FromUnicode() and PyLong_FromUnicode() - added support for Unicode to PyFloat_FromString() - new encoding API PyUnicode_EncodeDecimal() which converts Unicode to a decimal char* string (used in the above new APIs) - shortcuts for calls like int(<int object>) and float(<float obj>) - tests for all of the above Unicode compares and contains checks: - comparing Unicode and non-string types now works; TypeErrors are masked, all other errors such as ValueError during Unicode coercion are passed through (note that PyUnicode_Compare does not implement the masking -- PyObject_Compare does this) - contains now works for non-string types too; TypeErrors are masked and 0 returned; all other errors are passed through Better testing support for the standard codecs. Misc minor enhancements, such as an alias dbcs for the mbcs codec. Changes: - PyLong_FromString() now applies the same error checks as does PyInt_FromString(): trailing garbage is reported as error and not longer silently ignored. The only characters which may be trailing the digits are 'L' and 'l' -- these are still silently ignored. - string.ato?() now directly interface to int(), long() and float(). The error strings are now a little different, but the type still remains the same. These functions are now ready to get declared obsolete ;-) - PyNumber_Int() now also does a check for embedded NULL chars in the input string; PyNumber_Long() already did this (and still does) Followed by: Looks like I've gone a step too far there... (and test_contains.py seem to have a bug too). I've changed back to reporting all errors in PyUnicode_Contains() and added a few more test cases to test_contains.py (plus corrected the join() NameError).
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PyObject *
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PyInt_FromUnicode(Py_UNICODE *s, int length, int base)
Marc-Andre's third try at this bulk patch seems to work (except that his copy of test_contains.py seems to be broken -- the lines he deleted were already absent). Checkin messages: New Unicode support for int(), float(), complex() and long(). - new APIs PyInt_FromUnicode() and PyLong_FromUnicode() - added support for Unicode to PyFloat_FromString() - new encoding API PyUnicode_EncodeDecimal() which converts Unicode to a decimal char* string (used in the above new APIs) - shortcuts for calls like int(<int object>) and float(<float obj>) - tests for all of the above Unicode compares and contains checks: - comparing Unicode and non-string types now works; TypeErrors are masked, all other errors such as ValueError during Unicode coercion are passed through (note that PyUnicode_Compare does not implement the masking -- PyObject_Compare does this) - contains now works for non-string types too; TypeErrors are masked and 0 returned; all other errors are passed through Better testing support for the standard codecs. Misc minor enhancements, such as an alias dbcs for the mbcs codec. Changes: - PyLong_FromString() now applies the same error checks as does PyInt_FromString(): trailing garbage is reported as error and not longer silently ignored. The only characters which may be trailing the digits are 'L' and 'l' -- these are still silently ignored. - string.ato?() now directly interface to int(), long() and float(). The error strings are now a little different, but the type still remains the same. These functions are now ready to get declared obsolete ;-) - PyNumber_Int() now also does a check for embedded NULL chars in the input string; PyNumber_Long() already did this (and still does) Followed by: Looks like I've gone a step too far there... (and test_contains.py seem to have a bug too). I've changed back to reporting all errors in PyUnicode_Contains() and added a few more test cases to test_contains.py (plus corrected the join() NameError).
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{
char buffer[256];
if (length >= sizeof(buffer)) {
PyErr_SetString(PyExc_ValueError,
"int() literal too large to convert");
return NULL;
}
if (PyUnicode_EncodeDecimal(s, length, buffer, NULL))
return NULL;
return PyInt_FromString(buffer, NULL, base);
}
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/* Methods */
/* Integers are seen as the "smallest" of all numeric types and thus
don't have any knowledge about conversion of other types to
integers. */
#define CONVERT_TO_LONG(obj, lng) \
if (PyInt_Check(obj)) { \
lng = PyInt_AS_LONG(obj); \
} \
else { \
Py_INCREF(Py_NotImplemented); \
return Py_NotImplemented; \
}
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/* ARGSUSED */
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static int
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int_print(PyIntObject *v, FILE *fp, int flags)
/* flags -- not used but required by interface */
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{
fprintf(fp, "%ld", v->ob_ival);
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return 0;
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}
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static PyObject *
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int_repr(PyIntObject *v)
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{
char buf[20];
sprintf(buf, "%ld", v->ob_ival);
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return PyString_FromString(buf);
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}
static int
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int_compare(PyIntObject *v, PyIntObject *w)
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{
register long i = v->ob_ival;
register long j = w->ob_ival;
return (i < j) ? -1 : (i > j) ? 1 : 0;
}
static long
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int_hash(PyIntObject *v)
{
/* XXX If this is changed, you also need to change the way
Python's long, float and complex types are hashed. */
long x = v -> ob_ival;
if (x == -1)
x = -2;
return x;
}
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static PyObject *
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int_add(PyIntObject *v, PyIntObject *w)
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{
register long a, b, x;
CONVERT_TO_LONG(v, a);
CONVERT_TO_LONG(w, b);
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x = a + b;
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if ((x^a) < 0 && (x^b) < 0)
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return err_ovf("integer addition");
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return PyInt_FromLong(x);
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}
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static PyObject *
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int_sub(PyIntObject *v, PyIntObject *w)
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{
register long a, b, x;
CONVERT_TO_LONG(v, a);
CONVERT_TO_LONG(w, b);
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x = a - b;
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if ((x^a) < 0 && (x^~b) < 0)
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return err_ovf("integer subtraction");
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return PyInt_FromLong(x);
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}
/*
Integer overflow checking used to be done using a double, but on 64
bit machines (where both long and double are 64 bit) this fails
because the double doesn't have enough precision. John Tromp suggests
the following algorithm:
Suppose again we normalize a and b to be nonnegative.
Let ah and al (bh and bl) be the high and low 32 bits of a (b, resp.).
Now we test ah and bh against zero and get essentially 3 possible outcomes.
1) both ah and bh > 0 : then report overflow
2) both ah and bh = 0 : then compute a*b and report overflow if it comes out
negative
3) ah > 0 and bh = 0 : compute ah*bl and report overflow if it's >= 2^31
compute al*bl and report overflow if it's negative
add (ah*bl)<<32 to al*bl and report overflow if
it's negative
In case of no overflow the result is then negated if necessary.
The majority of cases will be 2), in which case this method is the same as
what I suggested before. If multiplication is expensive enough, then the
other method is faster on case 3), but also more work to program, so I
guess the above is the preferred solution.
*/
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static PyObject *
int_mul(PyObject *v, PyObject *w)
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{
long a, b, ah, bh, x, y;
int s = 1;
if (v->ob_type->tp_as_sequence &&
v->ob_type->tp_as_sequence->sq_repeat) {
/* sequence * int */
a = PyInt_AsLong(w);
return (*v->ob_type->tp_as_sequence->sq_repeat)(v, a);
}
else if (w->ob_type->tp_as_sequence &&
w->ob_type->tp_as_sequence->sq_repeat) {
/* int * sequence */
a = PyInt_AsLong(v);
return (*w->ob_type->tp_as_sequence->sq_repeat)(w, a);
}
CONVERT_TO_LONG(v, a);
CONVERT_TO_LONG(w, b);
ah = a >> (LONG_BIT/2);
bh = b >> (LONG_BIT/2);
/* Quick test for common case: two small positive ints */
if (ah == 0 && bh == 0) {
x = a*b;
if (x < 0)
goto bad;
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return PyInt_FromLong(x);
}
/* Arrange that a >= b >= 0 */
if (a < 0) {
a = -a;
if (a < 0) {
/* Largest negative */
if (b == 0 || b == 1) {
x = a*b;
goto ok;
}
else
goto bad;
}
s = -s;
ah = a >> (LONG_BIT/2);
}
if (b < 0) {
b = -b;
if (b < 0) {
/* Largest negative */
if (a == 0 || (a == 1 && s == 1)) {
x = a*b;
goto ok;
}
else
goto bad;
}
s = -s;
bh = b >> (LONG_BIT/2);
}
/* 1) both ah and bh > 0 : then report overflow */
if (ah != 0 && bh != 0)
goto bad;
/* 2) both ah and bh = 0 : then compute a*b and report
overflow if it comes out negative */
if (ah == 0 && bh == 0) {
x = a*b;
if (x < 0)
goto bad;
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return PyInt_FromLong(x*s);
}
if (a < b) {
/* Swap */
x = a;
a = b;
b = x;
ah = bh;
/* bh not used beyond this point */
}
/* 3) ah > 0 and bh = 0 : compute ah*bl and report overflow if
it's >= 2^31
compute al*bl and report overflow if it's negative
add (ah*bl)<<32 to al*bl and report overflow if
it's negative
(NB b == bl in this case, and we make a = al) */
y = ah*b;
if (y >= (1L << (LONG_BIT/2 - 1)))
goto bad;
a &= (1L << (LONG_BIT/2)) - 1;
x = a*b;
if (x < 0)
goto bad;
x += y << (LONG_BIT/2);
if (x < 0)
goto bad;
ok:
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return PyInt_FromLong(x * s);
bad:
return err_ovf("integer multiplication");
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}
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static int
i_divmod(register long xi, register long yi,
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long *p_xdivy, long *p_xmody)
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{
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long xdivy, xmody;
if (yi == 0) {
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PyErr_SetString(PyExc_ZeroDivisionError,
"integer division or modulo by zero");
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return -1;
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}
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if (yi < 0) {
if (xi < 0) {
if (yi == -1 && -xi < 0) {
/* most negative / -1 */
err_ovf("integer division");
return -1;
}
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xdivy = -xi / -yi;
}
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else
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xdivy = - (xi / -yi);
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}
else {
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if (xi < 0)
xdivy = - (-xi / yi);
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else
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xdivy = xi / yi;
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}
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xmody = xi - xdivy*yi;
if ((xmody < 0 && yi > 0) || (xmody > 0 && yi < 0)) {
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xmody += yi;
xdivy -= 1;
}
*p_xdivy = xdivy;
*p_xmody = xmody;
return 0;
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}
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static PyObject *
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int_div(PyIntObject *x, PyIntObject *y)
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{
long xi, yi;
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long d, m;
CONVERT_TO_LONG(x, xi);
CONVERT_TO_LONG(y, yi);
if (i_divmod(xi, yi, &d, &m) < 0)
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return NULL;
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return PyInt_FromLong(d);
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}
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static PyObject *
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int_mod(PyIntObject *x, PyIntObject *y)
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{
long xi, yi;
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long d, m;
CONVERT_TO_LONG(x, xi);
CONVERT_TO_LONG(y, yi);
if (i_divmod(xi, yi, &d, &m) < 0)
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return NULL;
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return PyInt_FromLong(m);
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}
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static PyObject *
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int_divmod(PyIntObject *x, PyIntObject *y)
{
long xi, yi;
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long d, m;
CONVERT_TO_LONG(x, xi);
CONVERT_TO_LONG(y, yi);
if (i_divmod(xi, yi, &d, &m) < 0)
return NULL;
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return Py_BuildValue("(ll)", d, m);
}
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static PyObject *
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int_pow(PyIntObject *v, PyIntObject *w, PyIntObject *z)
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{
#if 1
register long iv, iw, iz=0, ix, temp, prev;
CONVERT_TO_LONG(v, iv);
CONVERT_TO_LONG(w, iw);
if (iw < 0) {
if (iv)
PyErr_SetString(PyExc_ValueError,
"cannot raise integer to a negative power");
else
PyErr_SetString(PyExc_ZeroDivisionError,
"cannot raise 0 to a negative power");
return NULL;
}
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if ((PyObject *)z != Py_None) {
CONVERT_TO_LONG(z, iz);
if (iz == 0) {
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PyErr_SetString(PyExc_ValueError,
"pow() arg 3 cannot be 0");
return NULL;
}
}
/*
* XXX: The original exponentiation code stopped looping
* when temp hit zero; this code will continue onwards
* unnecessarily, but at least it won't cause any errors.
* Hopefully the speed improvement from the fast exponentiation
* will compensate for the slight inefficiency.
* XXX: Better handling of overflows is desperately needed.
*/
temp = iv;
ix = 1;
while (iw > 0) {
prev = ix; /* Save value for overflow check */
if (iw & 1) {
ix = ix*temp;
if (temp == 0)
break; /* Avoid ix / 0 */
if (ix / temp != prev)
return err_ovf("integer exponentiation");
}
iw >>= 1; /* Shift exponent down by 1 bit */
if (iw==0) break;
prev = temp;
temp *= temp; /* Square the value of temp */
if (prev!=0 && temp/prev!=prev)
return err_ovf("integer exponentiation");
if (iz) {
/* If we did a multiplication, perform a modulo */
ix = ix % iz;
temp = temp % iz;
}
}
if (iz) {
long div, mod;
if (i_divmod(ix, iz, &div, &mod) < 0)
return(NULL);
ix=mod;
}
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return PyInt_FromLong(ix);
#else
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register long iv, iw, ix;
CONVERT_TO_LONG(v, iv);
CONVERT_TO_LONG(w, iw);
if (iw < 0) {
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PyErr_SetString(PyExc_ValueError,
"integer to the negative power");
return NULL;
}
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if ((PyObject *)z != Py_None) {
PyErr_SetString(PyExc_TypeError,
"pow(int, int, int) not yet supported");
return NULL;
}
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ix = 1;
while (--iw >= 0) {
long prev = ix;
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ix = ix * iv;
if (iv == 0)
break; /* 0 to some power -- avoid ix / 0 */
if (ix / iv != prev)
return err_ovf("integer exponentiation");
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}
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return PyInt_FromLong(ix);
#endif
}
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static PyObject *
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int_neg(PyIntObject *v)
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{
register long a, x;
a = v->ob_ival;
x = -a;
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if (a < 0 && x < 0)
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return err_ovf("integer negation");
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return PyInt_FromLong(x);
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}
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static PyObject *
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int_pos(PyIntObject *v)
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{
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Py_INCREF(v);
return (PyObject *)v;
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}
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static PyObject *
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int_abs(PyIntObject *v)
{
if (v->ob_ival >= 0)
return int_pos(v);
else
return int_neg(v);
}
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static int
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int_nonzero(PyIntObject *v)
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{
return v->ob_ival != 0;
}
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static PyObject *
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int_invert(PyIntObject *v)
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{
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return PyInt_FromLong(~v->ob_ival);
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}
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static PyObject *
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int_lshift(PyIntObject *v, PyIntObject *w)
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{
register long a, b;
CONVERT_TO_LONG(v, a);
CONVERT_TO_LONG(w, b);
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if (b < 0) {
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PyErr_SetString(PyExc_ValueError, "negative shift count");
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return NULL;
}
if (a == 0 || b == 0) {
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Py_INCREF(v);
return (PyObject *) v;
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}
if (b >= LONG_BIT) {
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return PyInt_FromLong(0L);
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}
a = (unsigned long)a << b;
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return PyInt_FromLong(a);
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}
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static PyObject *
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int_rshift(PyIntObject *v, PyIntObject *w)
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{
register long a, b;
CONVERT_TO_LONG(v, a);
CONVERT_TO_LONG(w, b);
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if (b < 0) {
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PyErr_SetString(PyExc_ValueError, "negative shift count");
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return NULL;
}
if (a == 0 || b == 0) {
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Py_INCREF(v);
return (PyObject *) v;
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}
if (b >= LONG_BIT) {
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if (a < 0)
a = -1;
else
a = 0;
}
else {
a = Py_ARITHMETIC_RIGHT_SHIFT(long, a, b);
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}
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return PyInt_FromLong(a);
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}
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static PyObject *
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int_and(PyIntObject *v, PyIntObject *w)
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{
register long a, b;
CONVERT_TO_LONG(v, a);
CONVERT_TO_LONG(w, b);
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return PyInt_FromLong(a & b);
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}
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static PyObject *
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int_xor(PyIntObject *v, PyIntObject *w)
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{
register long a, b;
CONVERT_TO_LONG(v, a);
CONVERT_TO_LONG(w, b);
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return PyInt_FromLong(a ^ b);
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}
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static PyObject *
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int_or(PyIntObject *v, PyIntObject *w)
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{
register long a, b;
CONVERT_TO_LONG(v, a);
CONVERT_TO_LONG(w, b);
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return PyInt_FromLong(a | b);
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}
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static PyObject *
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int_int(PyIntObject *v)
{
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Py_INCREF(v);
return (PyObject *)v;
}
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static PyObject *
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int_long(PyIntObject *v)
{
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return PyLong_FromLong((v -> ob_ival));
}
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static PyObject *
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int_float(PyIntObject *v)
{
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return PyFloat_FromDouble((double)(v -> ob_ival));
}
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static PyObject *
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int_oct(PyIntObject *v)
{
char buf[100];
long x = v -> ob_ival;
if (x == 0)
strcpy(buf, "0");
else
sprintf(buf, "0%lo", x);
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return PyString_FromString(buf);
}
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static PyObject *
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int_hex(PyIntObject *v)
{
char buf[100];
long x = v -> ob_ival;
sprintf(buf, "0x%lx", x);
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return PyString_FromString(buf);
}
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static PyNumberMethods int_as_number = {
(binaryfunc)int_add, /*nb_add*/
(binaryfunc)int_sub, /*nb_subtract*/
(binaryfunc)int_mul, /*nb_multiply*/
(binaryfunc)int_div, /*nb_divide*/
(binaryfunc)int_mod, /*nb_remainder*/
(binaryfunc)int_divmod, /*nb_divmod*/
(ternaryfunc)int_pow, /*nb_power*/
(unaryfunc)int_neg, /*nb_negative*/
(unaryfunc)int_pos, /*nb_positive*/
(unaryfunc)int_abs, /*nb_absolute*/
(inquiry)int_nonzero, /*nb_nonzero*/
(unaryfunc)int_invert, /*nb_invert*/
(binaryfunc)int_lshift, /*nb_lshift*/
(binaryfunc)int_rshift, /*nb_rshift*/
(binaryfunc)int_and, /*nb_and*/
(binaryfunc)int_xor, /*nb_xor*/
(binaryfunc)int_or, /*nb_or*/
0, /*nb_coerce*/
(unaryfunc)int_int, /*nb_int*/
(unaryfunc)int_long, /*nb_long*/
(unaryfunc)int_float, /*nb_float*/
(unaryfunc)int_oct, /*nb_oct*/
(unaryfunc)int_hex, /*nb_hex*/
0, /*nb_inplace_add*/
0, /*nb_inplace_subtract*/
0, /*nb_inplace_multiply*/
0, /*nb_inplace_divide*/
0, /*nb_inplace_remainder*/
0, /*nb_inplace_power*/
0, /*nb_inplace_lshift*/
0, /*nb_inplace_rshift*/
0, /*nb_inplace_and*/
0, /*nb_inplace_xor*/
0, /*nb_inplace_or*/
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};
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PyTypeObject PyInt_Type = {
PyObject_HEAD_INIT(&PyType_Type)
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0,
"int",
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sizeof(PyIntObject),
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0,
(destructor)int_dealloc, /*tp_dealloc*/
(printfunc)int_print, /*tp_print*/
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0, /*tp_getattr*/
0, /*tp_setattr*/
(cmpfunc)int_compare, /*tp_compare*/
(reprfunc)int_repr, /*tp_repr*/
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&int_as_number, /*tp_as_number*/
0, /*tp_as_sequence*/
0, /*tp_as_mapping*/
(hashfunc)int_hash, /*tp_hash*/
0, /*tp_call*/
0, /*tp_str*/
0, /*tp_getattro*/
0, /*tp_setattro*/
0, /*tp_as_buffer*/
Py_TPFLAGS_CHECKTYPES /*tp_flags*/
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};
void
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PyInt_Fini(void)
{
PyIntObject *p;
PyIntBlock *list, *next;
int i;
int bc, bf; /* block count, number of freed blocks */
int irem, isum; /* remaining unfreed ints per block, total */
#if NSMALLNEGINTS + NSMALLPOSINTS > 0
PyIntObject **q;
i = NSMALLNEGINTS + NSMALLPOSINTS;
q = small_ints;
while (--i >= 0) {
Py_XDECREF(*q);
*q++ = NULL;
}
#endif
bc = 0;
bf = 0;
isum = 0;
list = block_list;
block_list = NULL;
free_list = NULL;
while (list != NULL) {
bc++;
irem = 0;
for (i = 0, p = &list->objects[0];
i < N_INTOBJECTS;
i++, p++) {
if (PyInt_Check(p) && p->ob_refcnt != 0)
irem++;
}
next = list->next;
if (irem) {
list->next = block_list;
block_list = list;
for (i = 0, p = &list->objects[0];
i < N_INTOBJECTS;
i++, p++) {
if (!PyInt_Check(p) || p->ob_refcnt == 0) {
p->ob_type = (struct _typeobject *)
free_list;
free_list = p;
}
#if NSMALLNEGINTS + NSMALLPOSINTS > 0
else if (-NSMALLNEGINTS <= p->ob_ival &&
p->ob_ival < NSMALLPOSINTS &&
small_ints[p->ob_ival +
NSMALLNEGINTS] == NULL) {
Py_INCREF(p);
small_ints[p->ob_ival +
NSMALLNEGINTS] = p;
}
#endif
}
}
else {
PyMem_FREE(list); /* XXX PyObject_FREE ??? */
bf++;
}
isum += irem;
list = next;
}
if (!Py_VerboseFlag)
return;
fprintf(stderr, "# cleanup ints");
if (!isum) {
fprintf(stderr, "\n");
}
else {
fprintf(stderr,
": %d unfreed int%s in %d out of %d block%s\n",
isum, isum == 1 ? "" : "s",
bc - bf, bc, bc == 1 ? "" : "s");
}
if (Py_VerboseFlag > 1) {
list = block_list;
while (list != NULL) {
for (i = 0, p = &list->objects[0];
i < N_INTOBJECTS;
i++, p++) {
if (PyInt_Check(p) && p->ob_refcnt != 0)
fprintf(stderr,
"# <int at %p, refcnt=%d, val=%ld>\n",
p, p->ob_refcnt, p->ob_ival);
}
list = list->next;
}
}
}