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Diffstat (limited to 'include/python2.7/longintrepr.h')
| -rw-r--r-- | include/python2.7/longintrepr.h | 103 |
1 files changed, 0 insertions, 103 deletions
diff --git a/include/python2.7/longintrepr.h b/include/python2.7/longintrepr.h deleted file mode 100644 index 6425c30..0000000 --- a/include/python2.7/longintrepr.h +++ /dev/null @@ -1,103 +0,0 @@ -#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. There are two different - sets of parameters: one set for 30-bit digits, stored in an unsigned 32-bit - integer type, and one set for 15-bit digits with each digit stored in an - unsigned short. The value of PYLONG_BITS_IN_DIGIT, defined either at - configure time or in pyport.h, is used to decide which digit size to use. - - Type 'digit' should be able to hold 2*PyLong_BASE-1, and type 'twodigits' - should be an unsigned integer type able to hold all integers up to - PyLong_BASE*PyLong_BASE-1. x_sub assumes that 'digit' is an unsigned type, - and that overflow is handled by taking the result modulo 2**N for some N > - PyLong_SHIFT. The majority of the code doesn't care about the precise - value of PyLong_SHIFT, but there are some notable exceptions: - - - long_pow() requires that PyLong_SHIFT be divisible by 5 - - - PyLong_{As,From}ByteArray require that PyLong_SHIFT be at least 8 - - - long_hash() requires that PyLong_SHIFT is *strictly* less than the number - of bits in an unsigned long, as do the PyLong <-> long (or unsigned long) - conversion functions - - - the long <-> size_t/Py_ssize_t conversion functions expect that - PyLong_SHIFT is strictly less than the number of bits in a size_t - - - the marshal code currently expects that PyLong_SHIFT is a multiple of 15 - - The values 15 and 30 should fit all of the above requirements, on any - platform. -*/ - -#if PYLONG_BITS_IN_DIGIT == 30 -#if !(defined HAVE_UINT64_T && defined HAVE_UINT32_T && \ - defined HAVE_INT64_T && defined HAVE_INT32_T) -#error "30-bit long digits requested, but the necessary types are not available on this platform" -#endif -typedef PY_UINT32_T digit; -typedef PY_INT32_T sdigit; /* signed variant of digit */ -typedef PY_UINT64_T twodigits; -typedef PY_INT64_T stwodigits; /* signed variant of twodigits */ -#define PyLong_SHIFT 30 -#define _PyLong_DECIMAL_SHIFT 9 /* max(e such that 10**e fits in a digit) */ -#define _PyLong_DECIMAL_BASE ((digit)1000000000) /* 10 ** DECIMAL_SHIFT */ -#elif PYLONG_BITS_IN_DIGIT == 15 -typedef unsigned short digit; -typedef short sdigit; /* signed variant of digit */ -typedef unsigned long twodigits; -typedef long stwodigits; /* signed variant of twodigits */ -#define PyLong_SHIFT 15 -#define _PyLong_DECIMAL_SHIFT 4 /* max(e such that 10**e fits in a digit) */ -#define _PyLong_DECIMAL_BASE ((digit)10000) /* 10 ** DECIMAL_SHIFT */ -#else -#error "PYLONG_BITS_IN_DIGIT should be 15 or 30" -#endif -#define PyLong_BASE ((digit)1 << PyLong_SHIFT) -#define PyLong_MASK ((digit)(PyLong_BASE - 1)) - -/* b/w compatibility with Python 2.5 */ -#define SHIFT PyLong_SHIFT -#define BASE PyLong_BASE -#define MASK PyLong_MASK - -#if PyLong_SHIFT % 5 != 0 -#error "longobject.c requires that PyLong_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 */ |