Flat File Database -1

FFDB1 is a simple C++ flat text file database implemented using STL. It consists of a single program, gen_ffdb, which generates a header file with a structure declaration, a rowset definition and two functions for reading/writing a complete rowset from/to a file. The datatypes it supports are:

• i - integer. Implemented as an int64_t
• f - floating point. Implemented as a double
• s - string. Implemented as a STL string
• r - raw. Implemented as a STL string<uint8_t>
• b - boolean. Implemented as a bool

Building

Simply type

  make

And it will build the executable. The Makefile assumes that you use g++, but you can change this in the Makefile. You may want to type make unittest to ensure that everything works as expected.

Using gen_ffdb

Synopsis

  gen_ffdb tablename fielddef1 [fielddef2 ...]

The tablename is used as the name for the structure and the basename for the generated .h and .cc files. A field definition is in the form name:type

Example

If you run

gen_ffdb foo id:i name:s password:r can_su:b quota:f

It will generate two files:foo.h and foo.cc. The header file foo.h will be:

#ifndef _foo_H_
#define _foo_H_

#include <vector>
#include <inttypes.h>
#include <string>

struct foo {
       	int64_t                	id;
       	std::string            	name;
       	std::string<uint8_t>	password;
       	bool                   	can_su;
       	double                 	quota;
};

typedef std::vector<foo> RowSet_foo;

bool LoadFromFile(const char *filename, RowSet_foo *result);
bool WriteToFile(const char *filename, const RowSet_foo &rowset);

#endif

and foo.cc will implement the two functions.

"I could have done that"

Yes. But you didn't. Did you? And now you save some time by not having to implement it yourself.

License

(same as zlib/libpng license)

Copyright (c) 2003 Ivan Skytte Jørgensen

This software is provided 'as-is', without any express or implied warranty.
In no event will the authors be held liable for any damages arising from the
use of this software.

Permission is granted to anyone to use this software for any purpose,
including commercial applications, and to alter it and redistribute it
freely, subject to the following restrictions:

1. The origin of this software must not be misrepresented; you must not
   claim that you wrote the original software. If you use this software
   in a product, an acknowledgment in the product documentation would be
   appreciated but is not required.

2. Altered source versions must be plainly marked as such, and must not be
   misrepresented as being the original software.

3. This notice may not be removed or altered from any source distribution.

Download

ffdb1-1.0.tar.gz (3KB)