60 lines
1.4 KiB
C
60 lines
1.4 KiB
C
/*
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* esqlite -- an erlang sqlite nif.
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*/
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#include <stdio.h> /* for debugging */
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#include <erl_nif.h>
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#include "sqlite3.h"
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#define MAX_PATHNAME 512 /* unfortunately not in sqlite.h. */
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static ERL_NIF_TERM _atom_ok;
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static ERL_NIF_TERM _atom_error;
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/*
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* Open database. Expects utf-8 input
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*/
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static ERL_NIF_TERM esqlite_open_nif(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
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{
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int rc;
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char filename[MAX_PATHNAME];
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sqlite3 *db;
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/* TODO ignore the utf-8 stuff for now */
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if(!enif_get_string(env, argv[0], filename, MAX_PATHNAME, ERL_NIF_LATIN1))
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return enif_make_badarg(env);
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/* open the database */
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rc = sqlite3_open(filename, &db);
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if( rc ) {
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fprintf(stderr, "Can't open database: %s\n", sqlite3_errmsg(db));
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sqlite3_close(db);
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/* maak een error tuple */
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return enif_make_tuple2(env, _atom_error, _atom_error); /* todo add error message */
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}
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/* and wrap it in an erlang resource */
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fprintf(stderr, "The database is open.\n");
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sqlite3_close(db);
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fprintf(stderr, "And closed\n");
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return enif_make_tuple2(env, _atom_ok, _atom_ok);
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}
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static int on_load(ErlNifEnv* env, void** priv, ERL_NIF_TERM info)
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{
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_atom_ok = enif_make_atom(env, "ok");
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_atom_error = enif_make_atom(env, "error");
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return 0;
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}
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static ErlNifFunc nif_funcs[] = {
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{"open", 1, esqlite_open_nif},
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};
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ERL_NIF_INIT(esqlite, nif_funcs, on_load, NULL, NULL, NULL);
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