zZzzZ. — /usr/include/python3.9

Editing: pyexpat.h

/* Stuff to export relevant 'expat' entry points from pyexpat to other
 * parser modules, such as cElementTree. */

/* note: you must import expat.h before importing this module! */

#define PyExpat_CAPI_MAGIC  "pyexpat.expat_CAPI 1.1"
#define PyExpat_CAPSULE_NAME "pyexpat.expat_CAPI"

struct PyExpat_CAPI
{
    char* magic; /* set to PyExpat_CAPI_MAGIC */
    int size; /* set to sizeof(struct PyExpat_CAPI) */
    int MAJOR_VERSION;
    int MINOR_VERSION;
    int MICRO_VERSION;
    /* pointers to selected expat functions.  add new functions at
       the end, if needed */
    const XML_LChar * (*ErrorString)(enum XML_Error code);
    enum XML_Error (*GetErrorCode)(XML_Parser parser);
    XML_Size (*GetErrorColumnNumber)(XML_Parser parser);
    XML_Size (*GetErrorLineNumber)(XML_Parser parser);
    enum XML_Status (*Parse)(
        XML_Parser parser, const char *s, int len, int isFinal);
    XML_Parser (*ParserCreate_MM)(
        const XML_Char *encoding, const XML_Memory_Handling_Suite *memsuite,
        const XML_Char *namespaceSeparator);
    void (*ParserFree)(XML_Parser parser);
    void (*SetCharacterDataHandler)(
        XML_Parser parser, XML_CharacterDataHandler handler);
    void (*SetCommentHandler)(
        XML_Parser parser, XML_CommentHandler handler);
    void (*SetDefaultHandlerExpand)(
        XML_Parser parser, XML_DefaultHandler handler);
    void (*SetElementHandler)(
        XML_Parser parser, XML_StartElementHandler start,
        XML_EndElementHandler end);
    void (*SetNamespaceDeclHandler)(
        XML_Parser parser, XML_StartNamespaceDeclHandler start,
        XML_EndNamespaceDeclHandler end);
    void (*SetProcessingInstructionHandler)(
        XML_Parser parser, XML_ProcessingInstructionHandler handler);
    void (*SetUnknownEncodingHandler)(
        XML_Parser parser, XML_UnknownEncodingHandler handler,
        void *encodingHandlerData);
    void (*SetUserData)(XML_Parser parser, void *userData);
    void (*SetStartDoctypeDeclHandler)(XML_Parser parser,
                                       XML_StartDoctypeDeclHandler start);
    enum XML_Status (*SetEncoding)(XML_Parser parser, const XML_Char *encoding);
    int (*DefaultUnknownEncodingHandler)(
        void *encodingHandlerData, const XML_Char *name, XML_Encoding *info);
    /* might be NULL for expat < 2.1.0 */
    int (*SetHashSalt)(XML_Parser parser, unsigned long hash_salt);
    /* might be NULL for expat < 2.6.0 */
    XML_Bool (*SetReparseDeferralEnabled)(XML_Parser parser, XML_Bool enabled);
    /* always add new stuff to the end! */
};