# very simple database.
# Keys are truncated to 32 bytes, made lowercase, and all characters that are
-# not alpha/numeric are replaced with underscores.
+# not alpha/numeric are replaced with underscores. Periods and hyphens are only
+# replaced if they are at the begining.
# Data can be either a string or an array.
# fdb_set_dir() passing the path to that directory.
+require_once('code/wfpl/file.php');
+require_once('code/wfpl/binary.php');
+
# call this to set what directory is used to store the files
function fdb_set_dir($dir) {
$GLOBALS['fdb_dir'] = $dir;
}
# remove the first 4 bytes of the string, and return them as an int
-function pop_int($&string) {
- $int = from_raw_int(substring($string, 0 4));
+function pop_int(&$string) {
+ $int = from_raw_int(substr($string, 0, 4));
$string = substr($string, 4);
return $int;
}
+function fdb_fix_key($key) {
+ $key = ereg_replace('[^a-z0-9.-]', '_', strtolower($key));
+ $key = ereg_replace('^[-.]', '_', strtolower($key));
+ return substr($key, 0, 32);
+}
+
function fdb_get_raw($key) {
$key = fdb_fix_key($key);
# like fdb_get() except it returns an array even when there's just one element
function fdb_geta($key) {
$key = fdb_fix_key($key);
- $data = fd_get_raw($key);
+ $data = fdb_get_raw($key);
if($data === false) {
return false;
}
$header_count = pop_int($data);
$out = array();
while($header_count--) {
- $size = int_at($data);
+ $size = pop_int($data);
$out[] = substr($data, 0, $size);
$data = substr($data, $size);
}
# array in this case too)
function fdb_get($key) {
$ret = fdb_geta($key);
+ if($ret == false) {
+ return false;
+ }
if(count($ret) == 1) {
return $ret[0];
} else {
}
# data can be a string or array
-function fdb_put($key, $data) {
+function fdb_set($key, $data) {
$key = fdb_fix_key($key);
if(!is_array($data)) {
$data = array($data);
$out .= to_raw_int(strlen($dat));
$out .= $dat;
}
- return $out;
+ fdb_set_raw($key, $out);
+}
+
+function fdb_delete($key) {
+ $key = fdb_fix_key($key);
+ $path = fdb_get_dir() . "/$key";
+ if(file_exists($path)) {
+ return unlink($path);
+ }
+ return false;
}
?>