diff -r 000000000000 -r ae805ac0140d python-2.5.2/win32/include/longintrepr.h --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/python-2.5.2/win32/include/longintrepr.h Fri Apr 03 17:19:34 2009 +0100 @@ -0,0 +1,63 @@ +#ifndef Py_LONGINTREPR_H +#define Py_LONGINTREPR_H +#ifdef __cplusplus +extern "C" { +#endif + + +/* This is published for the benefit of "friend" marshal.c only. */ + +/* Parameters of the long integer representation. + These shouldn't have to be changed as C should guarantee that a short + contains at least 16 bits, but it's made changeable anyway. + Note: 'digit' should be able to hold 2*MASK+1, and 'twodigits' + should be able to hold the intermediate results in 'mul' + (at most (BASE-1)*(2*BASE+1) == MASK*(2*MASK+3)). + Also, x_sub assumes that 'digit' is an unsigned type, and overflow + is handled by taking the result mod 2**N for some N > SHIFT. + And, at some places it is assumed that MASK fits in an int, as well. + long_pow() requires that SHIFT be divisible by 5. */ + +typedef unsigned short digit; +typedef unsigned int wdigit; /* digit widened to parameter size */ +#define BASE_TWODIGITS_TYPE long +typedef unsigned BASE_TWODIGITS_TYPE twodigits; +typedef BASE_TWODIGITS_TYPE stwodigits; /* signed variant of twodigits */ + +#define SHIFT 15 +#define BASE ((digit)1 << SHIFT) +#define MASK ((int)(BASE - 1)) + +#if SHIFT % 5 != 0 +#error "longobject.c requires that SHIFT be divisible by 5" +#endif + +/* Long integer representation. + The absolute value of a number is equal to + SUM(for i=0 through abs(ob_size)-1) ob_digit[i] * 2**(SHIFT*i) + Negative numbers are represented with ob_size < 0; + zero is represented by ob_size == 0. + In a normalized number, ob_digit[abs(ob_size)-1] (the most significant + digit) is never zero. Also, in all cases, for all valid i, + 0 <= ob_digit[i] <= MASK. + The allocation function takes care of allocating extra memory + so that ob_digit[0] ... ob_digit[abs(ob_size)-1] are actually available. + + CAUTION: Generic code manipulating subtypes of PyVarObject has to + aware that longs abuse ob_size's sign bit. +*/ + +struct _longobject { + PyObject_VAR_HEAD + digit ob_digit[1]; +}; + +PyAPI_FUNC(PyLongObject *) _PyLong_New(Py_ssize_t); + +/* Return a copy of src. */ +PyAPI_FUNC(PyObject *) _PyLong_Copy(PyLongObject *src); + +#ifdef __cplusplus +} +#endif +#endif /* !Py_LONGINTREPR_H */