--- /dev/null
+<?php
+
+# Copyright (C) 2007 Jason Woofenden
+#
+# This file is part of wfpl.
+#
+# wfpl is free software; you can redistribute it and/or modify it under the
+# terms of the GNU Lesser General Public License as published by the Free
+# Software Foundation; either version 2.1 of the License, or (at your option)
+# any later version.
+#
+# wfpl is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
+# more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with wfpl; if not, write to the Free Software Foundation, Inc., 51
+# Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+
+# This file contains code to use a web-writeable directory full of files as a
+# very simple database.
+
+# Keys are truncated to 32 bytes, made lowercase, and all characters that are
+# not alpha/numeric are replaced with underscores.
+
+# Data can be either a string or an array.
+
+# To set up the database, make a directory that's writeable by PHP and call
+# fdb_set_dir() passing the path to that directory.
+
+
+# call this to set what directory is used to store the files
+function fdb_set_dir($dir) {
+ $GLOBALS['fdb_dir'] = $dir;
+}
+
+function fdb_get_dir() {
+ if(!isset($GLOBALS['fdb_dir'])) {
+ die('you must call fdb_set_dir() before calling other functions in code/wfpl/fdb.php');
+ }
+ return $GLOBALS['fdb_dir'];
+}
+
+# return a 4 bytes that represent the passed integer as a big-endian binary number
+function to_raw_int($int) {
+ return chr($int >> 24) . chr(($int >> 16) & 0xff) . chr(($int >> 8) & 0xff) . chr($int & 0xff);
+}
+
+# return a php number from the string you pass in. The first 4 bytes of the
+# string are read in as a binary value in big-endian format.
+function from_raw_int($quad) {
+ return (ord(substr($quad, 0, 1)) << 24) + (ord(substr($quad, 1, 1)) << 16) + (ord(substr($quad, 2, 1)) << 8) + ord(substr($quad, 3, 1));
+}
+
+function int_at($string, $index) {
+ return from_raw_int(substr($string, $index * 4, 4));
+}
+
+# remove the first 4 bytes of the string, and return them as an int
+function pop_int($&string) {
+ $int = from_raw_int(substring($string, 0 4));
+ $string = substr($string, 4);
+ return $int;
+}
+
+
+
+function fdb_get_raw($key) {
+ $key = fdb_fix_key($key);
+ return read_whole_file_or_false(fdb_get_dir() . "/$key");
+}
+
+function fdb_set_raw($key, $data) {
+ $key = fdb_fix_key($key);
+ write_whole_file(fdb_get_dir() . "/$key", $data);
+}
+
+# like fdb_get() except it returns an array even when there's just one element
+function fdb_geta($key) {
+ $key = fdb_fix_key($key);
+ $data = fd_get_raw($key);
+ if($data === false) {
+ return false;
+ }
+ $header_count = pop_int($data);
+ $out = array();
+ while($header_count--) {
+ $size = int_at($data);
+ $out[] = substr($data, 0, $size);
+ $data = substr($data, $size);
+ }
+ return $out;
+}
+
+# returns:
+#
+# false if the key is not found in the database
+#
+# an array from the file otherwise
+#
+# a string if there's one field in that file (use fdb_geta() if you want an
+# array in this case too)
+function fdb_get($key) {
+ $ret = fdb_geta($key);
+ if(count($ret) == 1) {
+ return $ret[0];
+ } else {
+ return $ret;
+ }
+}
+
+# data can be a string or array
+function fdb_put($key, $data) {
+ $key = fdb_fix_key($key);
+ if(!is_array($data)) {
+ $data = array($data);
+ }
+ $out = to_raw_int(count($data));
+ foreach($data as $dat) {
+ $out .= to_raw_int(strlen($dat));
+ $out .= $dat;
+ }
+ return $out;
+}
+
+?>
--- /dev/null
+<?php
+
+# Copyright (C) 2007 Jason Woofenden
+#
+# This file is part of wfpl.
+#
+# wfpl is free software; you can redistribute it and/or modify it under the
+# terms of the GNU Lesser General Public License as published by the Free
+# Software Foundation; either version 2.1 of the License, or (at your option)
+# any later version.
+#
+# wfpl is distributed in the hope that it will be useful, but WITHOUT ANY
+# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
+# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
+# more details.
+#
+# You should have received a copy of the GNU Lesser General Public License
+# along with wfpl; if not, write to the Free Software Foundation, Inc., 51
+# Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
+
+
+# This exists because file_get_contents() is not documented well. (It says that
+# the second parameter is optional, but does not specify the default behavior.)
+function read_whole_file($name) {
+ $fd = fopen($name, 'r');
+ if($fd === false) {
+ die("Failed to read file: '$name'");
+ }
+ $file_data = fread($fd, filesize($name));
+ fclose($fd);
+ return $file_data;
+}
+
+# This exists because file_put_contents() is not included in PHP4.
+function write_whole_file($name, $data) {
+ $fd = fopen($name, 'w');
+ if($fd === false) {
+ die("Failed to read file: '$name'");
+ }
+ fwrite($fd, $data);
+ fclose($fd);
+}
+
+?>