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#include "R.h"
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#include "Rdefines.h"
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#include "Rinternals.h"
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#include "sqlite3.h"
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#ifndef __SQLITE_DATAFRAME__
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#define __SQLITE_DATAFRAME__
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#define WORKSPACE_COLUMNS 3
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/* utilities for checking characteristics of arg */
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int _is_r_sym(char *sym);
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int _file_exists(char *filename);
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int _sdf_exists2(char *iname);
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/* sdf utilities */
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SEXP _create_sdf_sexp(const char *iname); /* create a SEXP for an SDF */
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int _add_sdf1(char *filename, char *internal_name); /* add SDF to workspace */
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int _get_factor_levels1(const char *iname, const char *varname, SEXP var);
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int _get_row_count2(const char *table);
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SEXP _get_rownames(const char *sdf_iname);
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char *_get_full_pathname2(char *relpath); /* get full path given relpath, used in workspace mgmt */
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/* utilities for creating SDF's */
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char *_create_sdf_skeleton2(SEXP name, int *o_namelen);
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/* R utilities */
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SEXP _getListElement(SEXP list, char *varname);
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SEXP _shrink_vector(SEXP vec, int len); /* shrink vector size */
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/* sqlite utilities */
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int _empty_callback(void *data, int ncols, char **row, char **cols);
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int _sqlite_error(int res);
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const char *_get_column_type(const char *class, int type); /* get sqlite type corresponding to R class & type */
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/* global buffer (g_sql_buf) utilities */
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int _expand_buf(int i, int size); /* expand ith buf if size > buf[i].size */
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/* sqlite.vector utilities */
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SEXP sdf_get_variable(SEXP sdf, SEXP name);
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/* misc utilities */
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char *_r2iname(char *internal_name, char *filename);
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char *_fixname(char *rname);
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/* register functions to sqlite */
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void __register_vector_math();
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#define _sqlite_exec(sql) sqlite3_exec(g_workspace, sql, _empty_callback, NULL, NULL)
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#ifndef SET_ROWNAMES
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#define SET_ROWNAMES(x,n) setAttrib(x, R_RowNamesSymbol, n)
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#endif
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/* R object accessors shortcuts */
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#define CHAR_ELT(str, i) CHAR(STRING_ELT(str,i))
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/* SDF object accessors shortcuts */
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#define SDF_INAME(sdf) CHAR(STRING_ELT(_getListElement(sdf, "iname"),0))
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#define SVEC_VARNAME(sdf) CHAR(STRING_ELT(_getListElement(sdf, "varname"),0))
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/* # of sql buffers */
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#define NBUFS 4
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/* possible var types when stored in sqlite as integer */
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#define VAR_INTEGER 0
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#define VAR_FACTOR 1
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#define VAR_ORDERED 2
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/* detail constants (see _get_sdf_detail2 in sqlite_workspace.c) */
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#define SDF_DETAIL_EXISTS 0
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#define SDF_DETAIL_FULLFILENAME 1
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#ifndef __SQLITE_WORKSPACE__
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extern sqlite3 *g_workspace;
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extern char *g_sql_buf[NBUFS];
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extern int g_sql_buf_sz[NBUFS];
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#endif
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#endif
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