The R Project SVN R-packages

#include "R.h"

#include "Rdefines.h"

#include "Rinternals.h"

#include "sqlite3.h"

#ifndef __SQLITE_DATAFRAME__

#define __SQLITE_DATAFRAME__

/* # of sql buffers */

#define NBUFS 4

#ifdef __SQLITE_WORKSPACE__

SEXP SDF_RowNamesSymbol;

SEXP SDF_DimSymbol;

SEXP SDF_DimNamesSymbol;

#else 

extern SEXP SDF_RowNamesSymbol;

extern SEXP SDF_DimSymbol;

extern SEXP SDF_DimNamesSymbol;

extern sqlite3 *g_workspace;

extern char *g_sql_buf[NBUFS];

extern int g_sql_buf_sz[NBUFS];

#endif

#define WORKSPACE_COLUMNS 6

#define MAX_ATTACHED 30     /* 31 including workspace.db */

/* utilities for checking characteristics of arg */

int _is_r_sym(char *sym);

int _file_exists(char *filename);

int _sdf_exists2(char *iname);

/* sdf utilities */

int USE_SDF1(const char *iname, int exists, int protect);  /* call this before doing anything on an SDF */

int UNUSE_SDF2(const char *iname); /* somewhat like UNPROTECT */

SEXP _create_sdf_sexp(const char *iname);  /* create a SEXP for an SDF */

int _add_sdf1(char *filename, char *internal_name); /* add SDF to workspace */

void _delete_sdf2(const char *iname); /* remove SDF from workspace */

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

int _get_row_count2(const char *table, int quote);

SEXP _get_rownames(const char *sdf_iname);

char *_get_full_pathname2(char *relpath); /* get full path given relpath, used in workspace mgmt */

int _is_factor2(const char *iname, const char *factor_type, const char *colname);

SEXP _get_rownames2(const char *sdf_iname);

/* utilities for creating SDF's */

char *_create_sdf_skeleton1(SEXP name, int *o_namelen, int protect);

int _copy_factor_levels2(const char *factor_type, const char *iname_src,

        const char *colname_src, const char *iname_dst, const char *colname_dst);

int _create_factor_table2(const char *iname, const char *factor_type, 

        const char *colname);

char *_create_svector1(SEXP name, const char *type, int * _namelen, int protect);

/* R utilities */

SEXP _getListElement(SEXP list, char *varname);

SEXP _shrink_vector(SEXP vec, int len); /* shrink vector size */

/* sqlite utilities */

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

int _sqlite_error_check(int res, const char *file, int line);

const char *_get_column_type(const char *class, int type); /* get sqlite type corresponding to R class & type */

sqlite3* _is_sqlitedb(char *filename);

/* global buffer (g_sql_buf) utilities */

int _expand_buf(int i, int size);  /* expand ith buf if size > buf[i].size */

/* workspace utilities */

int _prepare_attach2();  /* prepare workspace before attaching a sqlite db */

/* misc utilities */

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

char *_fixname(char *rname);

char *_str_tolower(char *out, const char *ref);

/* register functions to sqlite */

void __register_vector_math();

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

#define _sqlite_error(res) _sqlite_error_check((res), __FILE__, __LINE__)

#ifdef __SQLITE_DEBUG__

#define _sqlite_begin  { _sqlite_error(_sqlite_exec("begin")); Rprintf("begin at "  __FILE__  " line %d\n",  __LINE__); }

#define _sqlite_commit  { _sqlite_error(_sqlite_exec("commit")); Rprintf("commit at "  __FILE__  " line %d\n",  __LINE__); }

#else

#define _sqlite_begin  _sqlite_error(_sqlite_exec("begin")) 

#define _sqlite_commit _sqlite_error(_sqlite_exec("commit"))

#endif

#ifndef SET_ROWNAMES

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

#endif

/* override R's, which does a GetRowNames which is different I believe */

#undef GET_ROWNAMES

#define GET_ROWNAMES(x) getAttrib(x, R_RowNamesSymbol)

/* 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))

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

#define VAR_INTEGER 0

#define VAR_FACTOR  1

#define VAR_ORDERED 2

/* detail constants (see _get_sdf_detail2 in sqlite_workspace.c) */

#define SDF_DETAIL_EXISTS 0

#define SDF_DETAIL_FULLFILENAME 1

/* R SXP type constants */

#define FACTORSXP 11

#define ORDEREDSXP 12

/* top level functions */

/* sqlite_workspace.c */

SEXP sdf_init_workspace();

SEXP sdf_finalize_workspace();

SEXP sdf_list_sdfs(SEXP pattern);

SEXP sdf_get_sdf(SEXP name);

SEXP sdf_attach_sdf(SEXP filename, SEXP internal_name);

SEXP sdf_detach_sdf(SEXP internal_name);

SEXP sdf_rename_sdf(SEXP sdf, SEXP name);

/* sqlite_dataframe.c */

SEXP sdf_create_sdf(SEXP df, SEXP name);

SEXP sdf_get_names(SEXP sdf);

SEXP sdf_get_length(SEXP sdf);

SEXP sdf_get_row_count(SEXP sdf);

SEXP sdf_import_table(SEXP _filename, SEXP _name, SEXP _sep, SEXP _quote, 

        SEXP _rownames, SEXP _colnames);

SEXP sdf_get_index(SEXP sdf, SEXP row, SEXP col);

SEXP sdf_rbind(SEXP sdf, SEXP data);

SEXP sdf_get_iname(SEXP sdf);

/* sqlite_vector.c */

SEXP sdf_get_variable(SEXP sdf, SEXP name);

SEXP sdf_get_variable_length(SEXP svec);

SEXP sdf_get_variable_index(SEXP svec, SEXP idx);

/* SEXP sdf_set_variable_index(SEXP svec, SEXP idx, SEXP value); */

SEXP sdf_variable_summary(SEXP svec, SEXP maxsum);

SEXP sdf_do_variable_math(SEXP func, SEXP vector, SEXP other_args);

SEXP sdf_do_variable_op(SEXP func, SEXP vector, SEXP op2, SEXP arg_reversed);

SEXP sdf_do_variable_summary(SEXP func, SEXP vector, SEXP na_rm);

SEXP sdf_sort_variable(SEXP svec, SEXP decreasing);

/* sqlite_external.c */

SEXP sdf_import_sqlite_table(SEXP _dbfilename, SEXP _tblname, SEXP _sdfiname);

/* sqlite_matrix.c */

SEXP sdf_as_matrix(SEXP sdf, SEXP name);

#endif