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#include "R.h"

#include "Rdefines.h"

#include "Rinternals.h"

#include "sqlite3.h"

#ifndef __SQLITE_DATAFRAME__

#define __SQLITE_DATAFRAME__

#define WORKSPACE_COLUMNS 3

int _is_r_sym(char *sym);

int _file_exists(char *filename);

int _empty_callback(void *data, int ncols, char **row, char **cols);

char *_r2iname(char *internal_name, char *filename);

char *_fixname(char *rname);

char *_get_full_pathname2(char *relpath);

int _sqlite_error(int res);

SEXP _getListElement(SEXP list, char *varname);

int _expand_buf(int i, int size);

const char *_get_column_type(const char *class, int type);

int _add_sdf1(char *filename, char *internal_name);

SEXP _create_sdf_sexp(const char *iname);

int _get_factor_levels1(const char *iname, const char *varname, SEXP var);

SEXP _shrink_vector(SEXP vec, int len);

int _get_row_count2(const char *table);

SEXP _get_rownames(const char *sdf_iname) ;

SEXP sdf_get_variable(SEXP sdf, SEXP name);

#define _sqlite_exec(sql) sqlite3_exec(g_workspace, sql, _empty_callback, NULL, NULL)

#ifndef SET_ROWNAMES

#define SET_ROWNAMES(x,n) setAttrib(x, R_RowNamesSymbol, n)

#endif

/* R object accessors shortcuts */

#define CHAR_ELT(str, i) CHAR(STRING_ELT(str,i))

/* SDF object accessors shortcuts */

#define SDF_INAME(sdf) CHAR(STRING_ELT(_getListElement(sdf, "iname"),0))

#define SVEC_VARNAME(sdf) CHAR(STRING_ELT(_getListElement(sdf, "varname"),0))

/* # of sql buffers */

#define NBUFS 4

/* possible var types when stored in sqlite as integer */

#define VAR_INTEGER 0

#define VAR_FACTOR  1

#define VAR_ORDERED 2

#ifndef __SQLITE_WORKSPACE__

extern sqlite3 *g_workspace;

extern char *g_sql_buf[NBUFS];

extern int g_sql_buf_sz[NBUFS];

#endif

#endif