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 *  You should have received a copy of the GNU Lesser General Public License
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 *  You should have received a copy of the GNU Lesser General Public License
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 *  along with this program; if not, a copy is available at
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 *  along with this program; if not, a copy is available at
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 *  http://www.r-project.org/Licenses/
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 *  http://www.r-project.org/Licenses/
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 */
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 */
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/*
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   Not part of the API, subject to change at any time.
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*/
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#ifndef R_CALLBACKS_H
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#ifndef R_CALLBACKS_H
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#define R_CALLBACKS_H
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#define R_CALLBACKS_H
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/**
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/**
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  These structures are for C (and R function) top-level task handlers.
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  These structures are for C (and R function) top-level task handlers.
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SEXP R_removeTaskCallback(SEXP which);
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SEXP R_removeTaskCallback(SEXP which);
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R_ToplevelCallbackEl* Rf_addTaskCallback(R_ToplevelCallback cb, void *data, void (*finalizer)(void *), const char *name, int *pos);
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R_ToplevelCallbackEl* Rf_addTaskCallback(R_ToplevelCallback cb, void *data, void (*finalizer)(void *), const char *name, int *pos);
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/**
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/*
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 The following definitions are for callbacks to R functions and methods
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  The following definitions are for callbacks to R functions and
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 related to user-level tables. This is currently implemented in a
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  methods related to user-level tables.  This was implemented in a
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 separate package and these declarations allow the package to
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  separate package on Omegahat and these declarations allow the package
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 interface to the internal R code.
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  to interface to the internal R code.
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 See http://developer.r-project.org/RObjectTables.pdf.
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  See http://developer.r-project.org/RObjectTables.pdf,
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  http://www.omegahat.org/RObjectTables/
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 */
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*/
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typedef struct  _R_ObjectTable R_ObjectTable;
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typedef struct  _R_ObjectTable R_ObjectTable;
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/* Do we actually need the exists() since it is never called but R uses get to see if
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/* Do we actually need the exists() since it is never called but R
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   the symbol is bound to anything? */
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   uses get to see if the symbol is bound to anything? */
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typedef Rboolean (*Rdb_exists)(const char * const name, Rboolean *canCache, R_ObjectTable *);
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typedef Rboolean (*Rdb_exists)(const char * const name, Rboolean *canCache, R_ObjectTable *);
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typedef SEXP     (*Rdb_get)(const char * const name, Rboolean *canCache, R_ObjectTable *);
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typedef SEXP     (*Rdb_get)(const char * const name, Rboolean *canCache, R_ObjectTable *);
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typedef int      (*Rdb_remove)(const char * const name, R_ObjectTable *);
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typedef int      (*Rdb_remove)(const char * const name, R_ObjectTable *);
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typedef SEXP     (*Rdb_assign)(const char * const name, SEXP value, R_ObjectTable *);
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typedef SEXP     (*Rdb_assign)(const char * const name, SEXP value, R_ObjectTable *);
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typedef SEXP     (*Rdb_objects)(R_ObjectTable *);
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typedef SEXP     (*Rdb_objects)(R_ObjectTable *);