dev-cpp-users

Re: [Dev-C++] Quick flat-file searching and I/O

[Daniel G. <sp...@ho...>]

Hey that looks useful from the description - I for one will look at that!


>From: "Yeoh HS" <ye...@ye...>
>Reply-To: "Yeoh HS" <ye...@ye...>
>To: <ci...@ya...>,   "Dev-C Mailing List" 
><dev...@li...>
>Subject: Re: [Dev-C++] Quick flat-file searching and I/O
>Date: Fri, 1 Aug 2003 10:15:51 +0800
>
>----- Original Message -----
>From: "David McKen" <ci...@ya...>
> > Application is used to store world data for a game. We wish
> > to use mySQL (or some other SQL database) as well asbe able
> > to store data in flat-files.
>
>For a database, you might want to check out SQLite.
>
>Here's some info from its website.
>"SQLite is a C library that implements an embeddable SQL database engine.
>Programs that link with the SQLite library can have SQL database access
>without running a separate RDBMS process. SQLite is not a client library
>used to connect to a big database server. SQLite is the server. The SQLite
>library reads and writes directly to and from the database files on disk."
>
>The URL is:
>http://www.sqlite.org
>
>
>Best Regards,
>Yeoh
>--
>
>
>
>
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Re: [Dev-C++] Quick flat-file searching and I/O

[David M. <ci...@ya...>]

That looks quite interesting...
Would save me the trouble of re-writing the current file
format.

----- Original Message ----- 
From: "Yeoh HS" <ye...@ye...>
To: <ci...@ya...>; "Dev-C Mailing List"
<dev...@li...>
Sent: Thursday, July 31, 2003 10:15 PM
Subject: Re: [Dev-C++] Quick flat-file searching and I/O


> ----- Original Message -----
> From: "David McKen" <ci...@ya...>
> > Application is used to store world data for a game. We
wish
> > to use mySQL (or some other SQL database) as well asbe
able
> > to store data in flat-files.
>
> For a database, you might want to check out SQLite.
>
> Here's some info from its website.
> "SQLite is a C library that implements an embeddable SQL
database engine.
> Programs that link with the SQLite library can have SQL
database access
> without running a separate RDBMS process. SQLite is not a
client library
> used to connect to a big database server. SQLite is the
server. The SQLite
> library reads and writes directly to and from the
database files on disk."
>
> The URL is:
> http://www.sqlite.org
>
>
> Best Regards,
> Yeoh
> --
>
>
>
>
> -------------------------------------------------------
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.NET.
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Re: [Dev-C++] Quick flat-file searching and I/O

[David M. <ci...@ya...>]

Small problem.

Room descriptions are strings of variable length. Also the
exit descriptions
are included in the same structure(also varible length
strings). This can
cause the size of a room to vary greatly).

This might still work if I were to put a limit on how long
a room
description could be and padd shorter descriptions to make
it  equal the
standard size

----- Original Message ----- 
From: "Kevin Wood" <ke...@me...>
To: "Dev-C Mailing List"
<dev...@li...>
Sent: Friday, August 01, 2003 7:58 PM
Subject: Re: [Dev-C++] Quick flat-file searching and I/O


> Hi everyone,
>
> I think the quickest way to access a portion of a file is
to structure it,
> then use the fseek function from stdio.
>
> In the case we are considering, the data for each room
should be about the
> same size. For example, if the data for a room is 500
bytes, each room's
> data can be stored in a file at 500 byte intervals, then
accessed using
the
> standard library routines. So to access room 50, you
would set the file
> pointer at 50 x 500.
>                  fseek(room_file_pointer, room_number *
500, SEEK_SET);
>
> If the data for each object is large, several files may
be needed, maybe
> with an index file.
>
> Kev.
>
>
>
>
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.NET.
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Re: [Dev-C++] Quick flat-file searching and I/O

[David M. <ci...@ya...>]

Hmm,

That would work. The only slow down would be when a
description changes. If
it is the same size we are fine if it is different then the
indexes for all
the records that follow would have to be updated. There
will be more reads
than writes anyway.

Sincerly
David Mcken

----- Original Message ----- 
From: "Joel Bushart" <bus...@be...>
To: <ci...@ya...>
Sent: Sunday, August 03, 2003 9:46 PM
Subject: Re: [Dev-C++] Quick flat-file searching and I/O


> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA1
>
> David McKen wrote:
>
> | Small problem.
> |
> | Room descriptions are strings of variable length. Also
the
> | exit descriptions
> | are included in the same structure(also varible length
> | strings). This can
> | cause the size of a room to vary greatly).
> |
> | This might still work if I were to put a limit on how
long
> | a room
> | description could be and padd shorter descriptions to
make
> | it  equal the
> | standard size
> |
>
> Perhaps, you could have two files one holding the data
and one holding a
> ~ index of the data in an array or bintree. Say you
wanted to load room 50
> you look it up in the index file (or array if you
pre-load it into
> memory) and then read that location using fseek.
>
>
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