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cpython/Objects/stringlib/README.txt
Gregory P. Smith 60d241f135 For PEP3137: Adds missing methods to the mutable PyBytes object (soon
to be called a buffer).  Shares code with stringobject when possible.
Adds unit tests with common code that should be usable to test the PEPs
mutable buffer() and immutable bytes() types.

 http://bugs.python.org/issue1261
2007-10-16 06:31:30 +00:00

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bits shared by the stringobject and unicodeobject implementations (and
possibly other modules, in a not too distant future).
the stuff in here is included into relevant places; see the individual
source files for details.
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the following defines used by the different modules:
STRINGLIB_CHAR
the type used to hold a character (char or Py_UNICODE)
STRINGLIB_EMPTY
a PyObject representing the empty string
int STRINGLIB_CMP(STRINGLIB_CHAR*, STRINGLIB_CHAR*, Py_ssize_t)
compares two strings. returns 0 if they match, and non-zero if not.
Py_ssize_t STRINGLIB_LEN(PyObject*)
returns the length of the given string object (which must be of the
right type)
PyObject* STRINGLIB_NEW(STRINGLIB_CHAR*, Py_ssize_t)
creates a new string object
STRINGLIB_CHAR* STRINGLIB_STR(PyObject*)
returns the pointer to the character data for the given string
object (which must be of the right type)
int STRINGLIB_CHECK_EXACT(PyObject *)
returns true if the object is an instance of our type, not a subclass.
STRINGLIB_MUTABLE
Must be 0 or 1 to tell the cpp macros in stringlib code if the object
being operated on is mutable or not.