Programming - various C/C++ code

July 24 2003

While working on a set of CGI programs I realized I needed to write some useful, reusable, code for manipulating various CGI tasks. The C++ classes use STL vector and string. The result of my work is listed below.

Download:

d_env.cpp
d_env.h

d_exec.cpp
d_exec.h
d_stdio.cpp
d_stdio.h
d_sql.cpp
d_sql.h

d_html.cpp
d_html.h

useful.cpp
useful.h

d_env.cpp - wrapper class for the environment table

Example:

d_env blah;
cout << blah << endl;
cout << d_env.gets( "request_uri")
<< endl;

// declares class
// displays the entire environment table
// displays the result of that var

d_exec.cpp - wrapper class for programmatically accessing output of an executed program

Example:

d_exec blah;
blah.prun( "/bin/ls -l 2>&1" );
cout << blah.size() << endl;
cout << blah << endl;
cout << blah.data[3]; // declares the class
// runs command, "2>&1" is there to force
// stderr display to show up in the program
// spits out number of output lines
// spits out the program result
// spits out line #3 of the output

d_stdio.cpp - wrapper class for the stdio data

Example:

d_stdio blah;
blah.spit();

cout << blah.data[3];
cout << blah.gets( "p1" );

// declares the class
// I was too lazy to write friend ostream so I just
// wrote a function to display everything
// displays stdio line #3
// returns line containing p1

d_sql.cpp - simple wrapper class for mysql

Example:

d_sql blah;
blah.d_host = "hostname";
blah.d_user = "username";
blah.d_pwd = "pass";
blah.d_db = "database";
blah.d_port = 3306;
blah.conn();
blah.query( "show tables" );
blah.close();
cout << blah.data[3];

// declares class
// sets parameters

// connects to server
// queries
// closes connection
// spits out line #3 (if it exists), furthermore,
// .head and .head2 contain information about
// the database table

d_html.cpp - simple class for creating / displaying html tables

Example:

d_html blah(3,4);
blah.resize( 3,3 );
blah.set( 1, 1, "bugaboo");
cout << blah;

// declares class, creates 3 x 4 table
// resizes table to 3 x 3 cells
// writes "bugaboo" to cell (1,1)
// spits out the html code to display the table

useful.cpp - some helpful functions for string to integer conversion

Example:

int test;
string blah;
test = str2int("4");
blah = int2str(test);

// declare integer to test the program with
// declare string
// converts string to integer
// converts integer to string

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