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/* Bytes (String) object interface / #ifndef Py_BYTESOBJECT_H #define Py_BYTESOBJECT_H #ifdef __cplusplus extern "C" { #endif #include <stdarg.h> / Type PyBytesObject represents a character string. An extra zero byte is reserved at the end to ensure it is zero-terminated, but a size is present so strings with null bytes in them can be represented. This is an immutable object type. There are functions to create new string objects, to test an object for string-ness, and to get the string value. The latter function returns a null pointer if the object is not of the proper type. There is a variant that takes an explicit size as well as a variant that assumes a zero-terminated string. Note that none of the functions should be applied to nil objects. / / Caching the hash (ob_shash) saves recalculation of a string's hash value. This significantly speeds up dict lookups. / #ifndef Py_LIMITED_API typedef struct { PyObject_VAR_HEAD Py_hash_t ob_shash; char ob_sval[1]; / Invariants: * ob_sval contains space for 'ob_size+1' elements. * ob_sval[ob_size] == 0. * ob_shash is the hash of the string or -1 if not computed yet. / } PyBytesObject; #endif PyAPI_DATA(PyTypeObject) PyBytes_Type; PyAPI_DATA(PyTypeObject) PyBytesIter_Type; #define PyBytes_Check(op) \ PyType_FastSubclass(Py_TYPE(op), Py_TPFLAGS_BYTES_SUBCLASS) #define PyBytes_CheckExact(op) (Py_TYPE(op) == &PyBytes_Type) PyAPI_FUNC(PyObject ) PyBytes_FromStringAndSize(const char , Py_ssize_t); PyAPI_FUNC(PyObject ) PyBytes_FromString(const char ); PyAPI_FUNC(PyObject ) PyBytes_FromObject(PyObject ); PyAPI_FUNC(PyObject ) PyBytes_FromFormatV(const char, va_list) Py_GCC_ATTRIBUTE((format(printf, 1, 0))); PyAPI_FUNC(PyObject ) PyBytes_FromFormat(const char, ...) Py_GCC_ATTRIBUTE((format(printf, 1, 2))); PyAPI_FUNC(Py_ssize_t) PyBytes_Size(PyObject ); PyAPI_FUNC(char ) PyBytes_AsString(PyObject ); PyAPI_FUNC(PyObject ) PyBytes_Repr(PyObject , int); PyAPI_FUNC(void) PyBytes_Concat(PyObject *, PyObject ); PyAPI_FUNC(void) PyBytes_ConcatAndDel(PyObject *, PyObject ); #ifndef Py_LIMITED_API PyAPI_FUNC(int) _PyBytes_Resize(PyObject *, Py_ssize_t); PyAPI_FUNC(PyObject) _PyBytes_FormatEx( const char format, Py_ssize_t format_len, PyObject args, int use_bytearray); PyAPI_FUNC(PyObject) _PyBytes_FromHex( PyObject string, int use_bytearray); #endif PyAPI_FUNC(PyObject ) PyBytes_DecodeEscape(const char , Py_ssize_t, const char , Py_ssize_t, const char ); #ifndef Py_LIMITED_API /* Helper for PyBytes_DecodeEscape that detects invalid escape chars. / PyAPI_FUNC(PyObject ) _PyBytes_DecodeEscape(const char , Py_ssize_t, const char , Py_ssize_t, const char , const char ); #endif / Macro, trading safety for speed / #ifndef Py_LIMITED_API #define PyBytes_AS_STRING(op) (assert(PyBytes_Check(op)), \ (((PyBytesObject )(op))->ob_sval)) #define PyBytes_GET_SIZE(op) (assert(PyBytes_Check(op)),Py_SIZE(op)) #endif /* _PyBytes_Join(sep, x) is like sep.join(x). sep must be PyBytesObject, x must be an iterable object. / #ifndef Py_LIMITED_API PyAPI_FUNC(PyObject ) _PyBytes_Join(PyObject sep, PyObject x); #endif / Provides access to the internal data buffer and size of a string object or the default encoded version of a Unicode object. Passing NULL as len parameter will force the string buffer to be 0-terminated (passing a string with embedded NULL characters will cause an exception). / PyAPI_FUNC(int) PyBytes_AsStringAndSize( PyObject obj, / string or Unicode object / char s, / pointer to buffer variable / Py_ssize_t len /* pointer to length variable or NULL (only possible for 0-terminated strings) / ); / Using the current locale, insert the thousands grouping into the string pointed to by buffer. For the argument descriptions, see Objects/stringlib/localeutil.h / #ifndef Py_LIMITED_API PyAPI_FUNC(Py_ssize_t) _PyBytes_InsertThousandsGroupingLocale(char buffer, Py_ssize_t n_buffer, char digits, Py_ssize_t n_digits, Py_ssize_t min_width); / Using explicit passed-in values, insert the thousands grouping into the string pointed to by buffer. For the argument descriptions, see Objects/stringlib/localeutil.h / PyAPI_FUNC(Py_ssize_t) _PyBytes_InsertThousandsGrouping(char buffer, Py_ssize_t n_buffer, char digits, Py_ssize_t n_digits, Py_ssize_t min_width, const char grouping, const char thousands_sep); #endif / Flags used by string formatting / #define F_LJUST (1<<0) #define F_SIGN (1<<1) #define F_BLANK (1<<2) #define F_ALT (1<<3) #define F_ZERO (1<<4) #ifndef Py_LIMITED_API / The _PyBytesWriter structure is big: it contains an embedded "stack buffer". A _PyBytesWriter variable must be declared at the end of variables in a function to optimize the memory allocation on the stack. / typedef struct { / bytes, bytearray or NULL (when the small buffer is used) / PyObject buffer; /* Number of allocated size. / Py_ssize_t allocated; / Minimum number of allocated bytes, incremented by _PyBytesWriter_Prepare() / Py_ssize_t min_size; / If non-zero, use a bytearray instead of a bytes object for buffer. / int use_bytearray; / If non-zero, overallocate the buffer (default: 0). This flag must be zero if use_bytearray is non-zero. / int overallocate; / Stack buffer / int use_small_buffer; char small_buffer[512]; } _PyBytesWriter; / Initialize a bytes writer By default, the overallocation is disabled. Set the overallocate attribute to control the allocation of the buffer. / PyAPI_FUNC(void) _PyBytesWriter_Init(_PyBytesWriter writer); /* Get the buffer content and reset the writer. Return a bytes object, or a bytearray object if use_bytearray is non-zero. Raise an exception and return NULL on error. / PyAPI_FUNC(PyObject ) _PyBytesWriter_Finish(_PyBytesWriter writer, void str); /* Deallocate memory of a writer (clear its internal buffer). / PyAPI_FUNC(void) _PyBytesWriter_Dealloc(_PyBytesWriter writer); /* Allocate the buffer to write size bytes. Return the pointer to the beginning of buffer data. Raise an exception and return NULL on error. / PyAPI_FUNC(void) _PyBytesWriter_Alloc(_PyBytesWriter writer, Py_ssize_t size); / Ensure that the buffer is large enough to write size bytes. Add size to the writer minimum size (min_size attribute). str is the current pointer inside the buffer. Return the updated current pointer inside the buffer. Raise an exception and return NULL on error. / PyAPI_FUNC(void) _PyBytesWriter_Prepare(_PyBytesWriter writer, void str, Py_ssize_t size); /* Resize the buffer to make it larger. The new buffer may be larger than size bytes because of overallocation. Return the updated current pointer inside the buffer. Raise an exception and return NULL on error. Note: size must be greater than the number of allocated bytes in the writer. This function doesn't use the writer minimum size (min_size attribute). See also _PyBytesWriter_Prepare(). / PyAPI_FUNC(void) _PyBytesWriter_Resize(_PyBytesWriter writer, void str, Py_ssize_t size); /* Write bytes. Raise an exception and return NULL on error. / PyAPI_FUNC(void) _PyBytesWriter_WriteBytes(_PyBytesWriter writer, void str, const void bytes, Py_ssize_t size); #endif / Py_LIMITED_API / #ifdef __cplusplus } #endif #endif / !Py_BYTESOBJECT_H */

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