#ifndef Py_CSTRINGIO_H

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#define Py_CSTRINGIO_H

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#ifdef __cplusplus

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extern "C" {

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#endif

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/*

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This header provides access to cStringIO objects from C.

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Functions are provided for calling cStringIO objects and

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macros are provided for testing whether you have cStringIO

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objects.

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Before calling any of the functions or macros, you must initialize

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the routines with:

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PycString_IMPORT

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This would typically be done in your init function.

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*/

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#define PycStringIO_CAPSULE_NAME "cStringIO.cStringIO_CAPI"

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#define PycString_IMPORT \

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PycStringIO = ((struct PycStringIO_CAPI*)PyCapsule_Import(\

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PycStringIO_CAPSULE_NAME, 0))

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/* Basic functions to manipulate cStringIO objects from C */

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static struct PycStringIO_CAPI {

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/* Read a string from an input object. If the last argument

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is -1, the remainder will be read.

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*/

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int(*cread)(PyObject *, char **, Py_ssize_t);

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/* Read a line from an input object. Returns the length of the read

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line as an int and a pointer inside the object buffer as char** (so

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the caller doesn't have to provide its own buffer as destination).

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*/

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int(*creadline)(PyObject *, char **);

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/* Write a string to an output object*/

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int(*cwrite)(PyObject *, const char *, Py_ssize_t);

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/* Get the output object as a Python string (returns new reference). */

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PyObject *(*cgetvalue)(PyObject *);

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/* Create a new output object */

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PyObject *(*NewOutput)(int);

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/* Create an input object from a Python string

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(copies the Python string reference).

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*/

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PyObject *(*NewInput)(PyObject *);

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/* The Python types for cStringIO input and output objects.

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Note that you can do input on an output object.

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*/

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PyTypeObject *InputType, *OutputType;

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} *PycStringIO;

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/* These can be used to test if you have one */

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#define PycStringIO_InputCheck(O) \

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(Py_TYPE(O)==PycStringIO->InputType)

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#define PycStringIO_OutputCheck(O) \

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(Py_TYPE(O)==PycStringIO->OutputType)

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#ifdef __cplusplus

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}

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#endif

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#endif /* !Py_CSTRINGIO_H */

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