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#include <mongo.h>
#include <errno.h>
#include <string.h>
#include <stdio.h>
#include <stdlib.h>
int
main (void)
{
mongo_sync_connection *conn;
mongo_packet *p;
mongo_sync_cursor *cursor;
bson *eval;
conn = mongo_sync_connect ("localhost", 27017, FALSE);
if (!conn)
{
perror ("mongo_sync_connect()");
exit (1);
}
eval = bson_build_full (BSON_TYPE_JS_CODE, "$eval", FALSE,
"function(x){return x + 4.2;}", -1,
BSON_TYPE_ARRAY, "args", TRUE,
bson_build (BSON_TYPE_INT32, "0", 1,
BSON_TYPE_NONE),
BSON_TYPE_NONE);
bson_finish (eval);
p = mongo_sync_cmd_custom (conn, "test", eval);
if (!p)
{
gchar *error = NULL;
mongo_sync_cmd_get_last_error (conn, "test", &error);
fprintf (stderr, "Can't run db.eval: %s\n", error);
g_free (error);
exit (1);
}
cursor = mongo_sync_cursor_new (conn, "test", p);
if (!cursor)
{
perror ("mongo_sync_cursor_new()");
exit (1);
}
while (mongo_sync_cursor_next (cursor))
{
bson *result;
bson_cursor *c;
gdouble r;
result = mongo_sync_cursor_get_data (cursor);
if (!result)
{
perror ("mongo_sync_cursor_get_data()");
exit (1);
}
c = bson_find (result, "retval");
if (!bson_cursor_get_double (c, &r))
{
perror ("bson_cursor_get_double()");
exit (1);
}
bson_cursor_free (c);
bson_free (result);
printf ("Result: %2.1f\n", r);
}
mongo_sync_cursor_free (cursor);
mongo_sync_disconnect (conn);
return 0;
}
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