Installation Instructions

*************************

unlimited permission to copy, distribute and modify it.

Basic Installation

==================

   The `configure' shell script attempts to guess correct values for

various system-dependent variables used during compilation.  It uses

those values to create a `Makefile' in each directory of the package.

It may also create one or more `.h' files containing system-dependent

definitions.  Finally, it creates a shell script `config.status' that

you can run in the future to recreate the current configuration, and a

file `config.log' containing compiler output (useful mainly for

debugging `configure').

   It can also use an optional file (typically called `config.cache'

and enabled with `--cache-file=config.cache' or simply `-C') that saves

disabled by default to prevent problems with accidental use of stale

   If you need to do unusual things to compile the package, please try

to figure out how `configure' could check whether to do them, and mail

diffs or instructions to the address given in the `README' so they can

be considered for the next release.  If you are using the cache, and at

some point `config.cache' contains results you don't want to keep, you

may remove or edit it.

   The file `configure.ac' (or `configure.in') is used to create

The simplest way to compile this package is:

  1. `cd' to the directory containing the package's source code and type

  2. Type `make' to compile the package.

  3. Optionally, type `make check' to run any self-tests that come with

     the package.

  4. Type `make install' to install the programs and any data files and

     documentation.

  5. You can remove the program binaries and object files from the

     source code directory by typing `make clean'.  To also remove the

     files that `configure' created (so you can compile the package for

     a different kind of computer), type `make distclean'.  There is

     also a `make maintainer-clean' target, but that is intended mainly

     for the package's developers.  If you use it, you may have to get

     all sorts of other programs in order to regenerate files that came

     with the distribution.

Compilers and Options

=====================

   You can give `configure' initial values for configuration parameters

by setting variables in the command line or in the environment.  Here

is an example:

   *Note Defining Variables::, for more details.

Compiling For Multiple Architectures

====================================

same time, by placing the object files for each architecture in their

directory where you want the object files and executables to go and run

the `configure' script.  `configure' automatically checks for the

source code in the directory that `configure' is in and in `..'.

Installation Names

==================

`/usr/local/bin', include files under `/usr/local/include', etc.  You

can specify an installation prefix other than `/usr/local' by giving

`configure' the option `--prefix=PREFIX'.

   You can specify separate installation prefixes for

architecture-specific files and architecture-independent files.  If you

pass the option `--exec-prefix=PREFIX' to `configure', the package uses

PREFIX as the prefix for installing programs and libraries.

Documentation and other data files still use the regular prefix.

   In addition, if you use an unusual directory layout you can give

options like `--bindir=DIR' to specify different values for particular

kinds of files.  Run `configure --help' for a list of the directories

you can set and what kinds of files go in them.

   If the package supports it, you can cause programs to be installed

with an extra prefix or suffix on their names by giving `configure' the

option `--program-prefix=PREFIX' or `--program-suffix=SUFFIX'.

Optional Features

=================

`configure', where FEATURE indicates an optional part of the package.

They may also pay attention to `--with-PACKAGE' options, where PACKAGE

is something like `gnu-as' or `x' (for the X Window System).  The

`README' should mention any `--enable-' and `--with-' options that the

package recognizes.

   For packages that use the X Window System, `configure' can usually

find the X include and library files automatically, but if it doesn't,

you can use the `configure' options `--x-includes=DIR' and

`--x-libraries=DIR' to specify their locations.

Specifying the System Type

==========================

`--build=TYPE' option.  TYPE can either be a short name for the system

type, such as `sun4', or a canonical name which has the form:

     CPU-COMPANY-SYSTEM

where SYSTEM can have one of these forms:

   See the file `config.sub' for the possible values of each field.  If

`config.sub' isn't included in this package, then this package doesn't

need to know the machine type.

   If you are _building_ compiler tools for cross-compiling, you should

use the option `--target=TYPE' to select the type of system they will

produce code for.

   If you want to _use_ a cross compiler, that generates code for a

platform different from the build platform, you should specify the

"host" platform (i.e., that on which the generated programs will

eventually be run) with `--host=TYPE'.

Sharing Defaults

================

`configure' looks for `PREFIX/share/config.site' if it exists, then

`PREFIX/etc/config.site' if it exists.  Or, you can set the

`CONFIG_SITE' environment variable to the location of the site script.

A warning: not all `configure' scripts look for a site script.

Defining Variables

==================

environment passed to `configure'.  However, some packages may run

configure again during the build, and the customized values of these

variables may be lost.  In order to avoid this problem, you should set

them in the `configure' command line, using `VAR=value'.  For example:

     ./configure CC=/usr/local2/bin/gcc

causes the specified `gcc' to be used as the C compiler (unless it is

`configure' Invocation

======================

`--help'

`-h'

`--version'

`-V'

     Print the version of Autoconf used to generate the `configure'

     script, and exit.

`--cache-file=FILE'

     Enable the cache: use and save the results of the tests in FILE,

     traditionally `config.cache'.  FILE defaults to `/dev/null' to

     disable caching.

`--config-cache'

`-C'

     Alias for `--cache-file=config.cache'.

`--quiet'

`--silent'

`-q'

     Do not print messages saying which checks are being made.  To

     suppress all normal output, redirect it to `/dev/null' (any error

     messages will still be shown).

`--srcdir=DIR'

     Look for the package's source code in directory DIR.  Usually

     `configure' can determine that directory automatically.

`configure' also accepts some other, not widely useful, options.  Run

`configure --help' for more details.

/*

  Copyright 2009 Nathan Phillip Brink, Ethan Zonca, Matthew Orlando

  This file is a part of DistRen.

  DistRen is free software: you can redistribute it and/or modify

  it under the terms of the GNU Affero General Public License as published by

  the Free Software Foundation, either version 3 of the License, or

  (at your option) any later version.

  DistRen 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 Affero General Public License for more details.

  You should have received a copy of the GNU Affero General Public License

  along with DistRen.  If not, see <http://www.gnu.org/licenses/>.

*/

#include "asprintf.h"

#include "user_mgr.h"

#include <malloc.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <unistd.h>

#include <libxml/xmlmemory.h>

#include <libxml/parser.h>

#include <libxml/tree.h>

#include <libxml/encoding.h>

#include <libxml/xmlwriter.h>

#include <libxml/xmlreader.h>

struct user_mgr_info

{

	struct user *user_array;

	int current_users;

	int user_array_size;

} user_mgr_info;

int resize_user_array()

{

	int counter;

	int counter2;

	// create array twice the size of the current amount of users

	user_mgr_info.user_array_size = user_mgr_info.current_users * 2;

	struct user *new_user_array = malloc(sizeof(struct user) * user_mgr_info.user_array_size);

	// this copies the original user_array over to the new one

	// using two counters allows the array to be resized at any time

	// leaving exactly 1 open space between each user when it is done;

	counter2 = 0;

	for(counter = 0; counter < user_mgr_info.current_users; counter++)

	{

		if(user_mgr_info.user_array[counter].username != 0)

		{

			new_user_array[counter2*2] = user_mgr_info.user_array[counter];

			counter2++;

		}

	}

	// cleanup old array

	free(user_mgr_info.user_array);

	// change the pointer to point to the new user array

	user_mgr_info.user_array = new_user_array;

	return 1;

}

struct user *findUser(char *nameOfUser)

{

	int high;

	int low;

	int middle;

	int result;

	high = user_mgr_info.user_array_size - 1;

	low = 0;

	for(middle = (low+high)/2; 1 == 1; middle = (low+high)/2)

	{

		// in case middle lands on a part of the array with no user

		while(user_mgr_info.user_array[middle].username == 0)

		{

			if(result < 0)

				middle--;

			else

				middle++;

		}

		// this is where the array is cut in half and the half that the nameOfUser is on is kept

		result = strcmp(nameOfUser, user_mgr_info.user_array[middle].username);

		if(result == 0)

			return &user_mgr_info.user_array[middle];

		else if(result < 0)

			high = middle;

		else

			low = middle;

		// in case the user doesn't exist

		if(high-low <= 0)

			return 0;

	}

}

int deleteUser(struct user *user_ptr)

{

	free(user_ptr->username);

	memset(user_ptr, '\0', sizeof(struct user));

	return 1;

}

int createUser(struct user *user_ptr, char *nameOfUser)

{

	// clear old memory

	memset(user_ptr, '\0', sizeof(struct user));

	user_ptr->username = nameOfUser;

	user_ptr->render_power = 0;

	user_ptr->last_job = 0;

	return 1;

}

// places the new user at position index in the array, moves other users if it needs to

int placeUser(int index, char *nameOfUser)

{

	int higher;

	int lower;

	// I shift data in the array to create an open the space where the user should be added

	// but first I figure out which way is the shortest

	if(user_mgr_info.user_array[index].username != 0)

	{

		higher = index + 1;

		while(user_mgr_info.user_array[higher].username != 0)

			higher++;

		lower = index - 1;

		while(user_mgr_info.user_array[lower].username != 0)

			lower--;

		// here the data is shifted to open up a space

		if(index - lower < higher - index)

				memcpy(&user_mgr_info.user_array[lower], &user_mgr_info.user_array[lower + 1], sizeof(struct user));

		else

				memcpy(&user_mgr_info.user_array[higher], &user_mgr_info.user_array[higher - 1], sizeof(struct user));

	}

	// add the user to the array

	createUser(&user_mgr_info.user_array[index], nameOfUser);

	return 1;

}

int addUser(char *nameOfUser)

{

	int high;

	int low;

	int middle;

	int result;

	high = user_mgr_info.user_array_size - 1;

	low = 0;

	for(middle = (low+high)/2; 1 == 1; middle = (low+high)/2)

	{

		// in case middle lands on a part of the array with no user

		while(user_mgr_info.user_array[middle].username == 0)

		{

			if(result < 0)

				middle--;

			else

				middle++;

		}

		// this is where the array is cut in half and the half that the nameOfUser is on is kept

		result = strcmp(nameOfUser, user_mgr_info.user_array[middle].username);

		if(result == 0)

			return 0;

		else if(result < 0)

			high = middle;

		else

			low = middle;

		// once there are less than 10 possible places for the user to be placed

		// break out of this loop and begin next loop

		if(high-low <= 10)

			break;

	}

	// this function starts at the low index number, and goes up until it finds a

	// username that is bigger than it alphabetically, and tells the userPlacer

	// that it needs to go 1 before that spot

	for(; low <= high; low++)

	{

		while(user_mgr_info.user_array[low].username == 0)

			low++;

		result = strcmp(nameOfUser, user_mgr_info.user_array[low].username) < 0;

		if(result < 0)

		{

			placeUser(low - 1, nameOfUser);

			return 1;

		}

		if(result == 0)

		{

			fprintf(stderr, "user already exists");

			return 0;

		}

	}

	return 0;

}

int initialize_users()

{

}

/********************************** XMLness *****************************/

int backup_list_XML()

{

	xmlTextWriterPtr writer;

	int counter;

	writer = xmlNewTextWriterFilename("user_list.xml", 0);

	xmlTextWriterStartDocument(writer, NULL, "utf-8", NULL);

	// create root element user_list

	xmlTextWriterStartElement(writer, (xmlChar*)"user_list");

	for(counter = 0; counter < user_mgr_info.user_array_size; counter++)

	{

		if(user_mgr_info.user_array[counter].username != 0)

		{

			xmlTextWriterStartElement(writer, (xmlChar*)"user");

			xmlTextWriterWriteAttribute(writer, (xmlChar*)"name", (xmlChar*)user_mgr_info.user_array[counter].username);

			_distren_asprintf(&tmp, "%d", user_mgr_info.user_array[counter].last_job);

			xmlTextWriterWriteAttribute(writer, (xmlChar*)"last_job", (xmlChar*)tmp);

			xmlTextWriterEndElement(writer);

		}

	}

	return 0;

}

/*

  Copyright 2009 Nathan Phillip Brink, Ethan Zonca, Matthew Orlando

  This file is a part of DistRen.

  DistRen is free software: you can redistribute it and/or modify

  it under the terms of the GNU Affero General Public License as published by

  the Free Software Foundation, either version 3 of the License, or

  (at your option) any later version.

  DistRen 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 Affero General Public License for more details.

  You should have received a copy of the GNU Affero General Public License

  along with DistRen.  If not, see <http://www.gnu.org/licenses/>.

*/

/*

 * Stores, keeps track of, retrieves information concerning,

 * and backs up to XML DistRen's userdb system

 */

#ifndef _DISTREN_USER_MGR_H

#define _DISTREN_USER_MGR_H

struct user

{

	char *username;

	int render_power;

	int last_job;

};

#endif