1 #ifndef Py_LONGOBJECT_H 2 #define Py_LONGOBJECT_H 3 #ifdef __cplusplus 4 extern "C" { 5 #endif 6 7 8 /* Long (arbitrary precision) integer object interface */ 9 10 typedef struct _longobject PyLongObject; /* Revealed in longintrepr.h */ 11 12 PyAPI_DATA(PyTypeObject) PyLong_Type; 13 14 #define PyLong_Check(op) \ 15 PyType_FastSubclass(Py_TYPE(op), Py_TPFLAGS_LONG_SUBCLASS) 16 #define PyLong_CheckExact(op) (Py_TYPE(op) == &PyLong_Type) 17 18 PyAPI_FUNC(PyObject *) PyLong_FromLong(long); 19 PyAPI_FUNC(PyObject *) PyLong_FromUnsignedLong(unsigned long); 20 PyAPI_FUNC(PyObject *) PyLong_FromDouble(double); 21 PyAPI_FUNC(PyObject *) PyLong_FromSize_t(size_t); 22 PyAPI_FUNC(PyObject *) PyLong_FromSsize_t(Py_ssize_t); 23 PyAPI_FUNC(long) PyLong_AsLong(PyObject *); 24 PyAPI_FUNC(long) PyLong_AsLongAndOverflow(PyObject *, int *); 25 PyAPI_FUNC(unsigned long) PyLong_AsUnsignedLong(PyObject *); 26 PyAPI_FUNC(unsigned long) PyLong_AsUnsignedLongMask(PyObject *); 27 PyAPI_FUNC(Py_ssize_t) PyLong_AsSsize_t(PyObject *); 28 PyAPI_FUNC(PyObject *) PyLong_GetInfo(void); 29 30 /* For use by intobject.c only */ 31 #define _PyLong_AsSsize_t PyLong_AsSsize_t 32 #define _PyLong_FromSize_t PyLong_FromSize_t 33 #define _PyLong_FromSsize_t PyLong_FromSsize_t 34 PyAPI_DATA(int) _PyLong_DigitValue[256]; 35 36 /* _PyLong_Frexp returns a double x and an exponent e such that the 37 true value is approximately equal to x * 2**e. e is >= 0. x is 38 0.0 if and only if the input is 0 (in which case, e and x are both 39 zeroes); otherwise, 0.5 <= abs(x) < 1.0. On overflow, which is 40 possible if the number of bits doesn't fit into a Py_ssize_t, sets 41 OverflowError and returns -1.0 for x, 0 for e. */ 42 PyAPI_FUNC(double) _PyLong_Frexp(PyLongObject *a, Py_ssize_t *e); 43 44 PyAPI_FUNC(double) PyLong_AsDouble(PyObject *); 45 PyAPI_FUNC(PyObject *) PyLong_FromVoidPtr(void *); 46 PyAPI_FUNC(void *) PyLong_AsVoidPtr(PyObject *); 47 48 #ifdef HAVE_LONG_LONG 49 PyAPI_FUNC(PyObject *) PyLong_FromLongLong(PY_LONG_LONG); 50 PyAPI_FUNC(PyObject *) PyLong_FromUnsignedLongLong(unsigned PY_LONG_LONG); 51 PyAPI_FUNC(PY_LONG_LONG) PyLong_AsLongLong(PyObject *); 52 PyAPI_FUNC(unsigned PY_LONG_LONG) PyLong_AsUnsignedLongLong(PyObject *); 53 PyAPI_FUNC(unsigned PY_LONG_LONG) PyLong_AsUnsignedLongLongMask(PyObject *); 54 PyAPI_FUNC(PY_LONG_LONG) PyLong_AsLongLongAndOverflow(PyObject *, int *); 55 #endif /* HAVE_LONG_LONG */ 56 57 PyAPI_FUNC(PyObject *) PyLong_FromString(char *, char **, int); 58 #ifdef Py_USING_UNICODE 59 PyAPI_FUNC(PyObject *) PyLong_FromUnicode(Py_UNICODE*, Py_ssize_t, int); 60 #endif 61 62 /* _PyLong_Sign. Return 0 if v is 0, -1 if v < 0, +1 if v > 0. 63 v must not be NULL, and must be a normalized long. 64 There are no error cases. 65 */ 66 PyAPI_FUNC(int) _PyLong_Sign(PyObject *v); 67 68 69 /* _PyLong_NumBits. Return the number of bits needed to represent the 70 absolute value of a long. For example, this returns 1 for 1 and -1, 2 71 for 2 and -2, and 2 for 3 and -3. It returns 0 for 0. 72 v must not be NULL, and must be a normalized long. 73 (size_t)-1 is returned and OverflowError set if the true result doesn't 74 fit in a size_t. 75 */ 76 PyAPI_FUNC(size_t) _PyLong_NumBits(PyObject *v); 77 78 /* _PyLong_FromByteArray: View the n unsigned bytes as a binary integer in 79 base 256, and return a Python long with the same numeric value. 80 If n is 0, the integer is 0. Else: 81 If little_endian is 1/true, bytes[n-1] is the MSB and bytes[0] the LSB; 82 else (little_endian is 0/false) bytes[0] is the MSB and bytes[n-1] the 83 LSB. 84 If is_signed is 0/false, view the bytes as a non-negative integer. 85 If is_signed is 1/true, view the bytes as a 2's-complement integer, 86 non-negative if bit 0x80 of the MSB is clear, negative if set. 87 Error returns: 88 + Return NULL with the appropriate exception set if there's not 89 enough memory to create the Python long. 90 */ 91 PyAPI_FUNC(PyObject *) _PyLong_FromByteArray( 92 const unsigned char* bytes, size_t n, 93 int little_endian, int is_signed); 94 95 /* _PyLong_AsByteArray: Convert the least-significant 8*n bits of long 96 v to a base-256 integer, stored in array bytes. Normally return 0, 97 return -1 on error. 98 If little_endian is 1/true, store the MSB at bytes[n-1] and the LSB at 99 bytes[0]; else (little_endian is 0/false) store the MSB at bytes[0] and 100 the LSB at bytes[n-1]. 101 If is_signed is 0/false, it's an error if v < 0; else (v >= 0) n bytes 102 are filled and there's nothing special about bit 0x80 of the MSB. 103 If is_signed is 1/true, bytes is filled with the 2's-complement 104 representation of v's value. Bit 0x80 of the MSB is the sign bit. 105 Error returns (-1): 106 + is_signed is 0 and v < 0. TypeError is set in this case, and bytes 107 isn't altered. 108 + n isn't big enough to hold the full mathematical value of v. For 109 example, if is_signed is 0 and there are more digits in the v than 110 fit in n; or if is_signed is 1, v < 0, and n is just 1 bit shy of 111 being large enough to hold a sign bit. OverflowError is set in this 112 case, but bytes holds the least-signficant n bytes of the true value. 113 */ 114 PyAPI_FUNC(int) _PyLong_AsByteArray(PyLongObject* v, 115 unsigned char* bytes, size_t n, 116 int little_endian, int is_signed); 117 118 /* _PyLong_Format: Convert the long to a string object with given base, 119 appending a base prefix of 0[box] if base is 2, 8 or 16. 120 Add a trailing "L" if addL is non-zero. 121 If newstyle is zero, then use the pre-2.6 behavior of octal having 122 a leading "0", instead of the prefix "0o" */ 123 PyAPI_FUNC(PyObject *) _PyLong_Format(PyObject *aa, int base, int addL, int newstyle); 124 125 /* Format the object based on the format_spec, as defined in PEP 3101 126 (Advanced String Formatting). */ 127 PyAPI_FUNC(PyObject *) _PyLong_FormatAdvanced(PyObject *obj, 128 char *format_spec, 129 Py_ssize_t format_spec_len); 130 131 #ifdef __cplusplus 132 } 133 #endif 134 #endif /* !Py_LONGOBJECT_H */ 135
