package # hide this package from CPAN indexer
Win32::ODBC;

#use strict;

use DBI;

# once we've been loaded we don't want perl to load the real Win32::ODBC
$INC{'Win32/ODBC.pm'} = $INC{'Win32/DBIODBC.pm'} || 1;

#my $db = new Win32::ODBC("DSN=$self->{'DSN'};UID=$self->{'UID'};PWD=$self->{'PWD'};");

#EMU --- my $db = new Win32::ODBC("DSN=$DSN;UID=$login;PWD=$password;");
sub new
{
shift;
my $connect_line= shift;

# [R] self-hack to allow empty UID and PWD
my $temp_connect_line;
$connect_line=~/DSN=\w+/;
$temp_connect_line="$&;";
if ($connect_line=~/UID=\w?/)
{$temp_connect_line.="$&;";}
else {$temp_connect_line.="UID=;";};
if ($connect_line=~/PWD=\w?/)
{$temp_connect_line.="$&;";}
else {$temp_connect_line.="PWD=;";};
$connect_line=$temp_connect_line;
# -[R]-

my $self= {};


$_=$connect_line;
/^(DSN=)(.*)(;UID=)(.*)(;PWD=)(.*)(;)$/;

#---- DBI CONNECTION VARIABLES

$self->{ODBC_DSN}=$2;
$self->{ODBC_UID}=$4;
$self->{ODBC_PWD}=$6;


#---- DBI CONNECTION VARIABLES
$self->{DBI_DBNAME}=$self->{ODBC_DSN};
$self->{DBI_USER}=$self->{ODBC_UID};
$self->{DBI_PASSWORD}=$self->{ODBC_PWD};
$self->{DBI_DBD}='ODBC';

#---- DBI CONNECTION
$self->{'DBI_DBH'}=DBI->connect($self->{'DBI_DBNAME'},
$self->{'DBI_USER'},$self->{'DBI_PASSWORD'},$self->{'DBI_DBD'});

warn "Error($DBI::err) : $DBI::errstr\n" if ! $self->{'DBI_DBH'};


#---- RETURN

bless $self;
}


#EMU --- $db->Sql('SELECT * FROM DUAL');
sub Sql
{
my $self= shift;
my $SQL_statment=shift;

# print " SQL : $SQL_statment \n";

$self->{'DBI_SQL_STATMENT'}=$SQL_statment;

my $dbh=$self->{'DBI_DBH'};

# print " DBH : $dbh \n";

my $sth=$dbh->prepare("$SQL_statment");

# print " STH : $sth \n";

$self->{'DBI_STH'}=$sth;

if ($sth)
{
$sth->execute();
}

#--- GET ERROR MESSAGES
$self->{DBI_ERR}=$DBI::err;
$self->{DBI_ERRSTR}=$DBI::errstr;

if ($sth)
{
#--- GET COLUMNS NAMES
$self->{'DBI_NAME'} = $sth->{NAME};
}

# [R] provide compatibility with Win32::ODBC's way of identifying erroneous SQL statements
return ($self->{'DBI_ERR'})?1:undef;
# -[R]-
}


#EMU --- $db->FetchRow())
sub FetchRow
{
my $self= shift;

my $sth=$self->{'DBI_STH'};
if ($sth)
{
my @row=$sth->fetchrow_array;
$self->{'DBI_ROW'}=\@row;

if (scalar(@row)>0)
{
#-- the row of result is not nul
#-- return something nothing will be return else
return 1;
}
}
return undef;
}

# [R] provide compatibility with Win32::ODBC's Data() method.
sub Data
{
my $self=shift;
my @array=@{$self->{'DBI_ROW'}};
foreach my $element (@array)
{
# remove padding of spaces by DBI
$element=~s/(\s*$)//;
};
return (wantarray())?@array:join('', @array);
};
# -[R]-

#EMU --- %record = $db->DataHash;
sub DataHash
{
my $self= shift;

my $p_name=$self->{'DBI_NAME'};
my $p_row=$self->{'DBI_ROW'};

my @name=@$p_name;
my @row=@$p_row;

my %DataHash;
#print @name; print "\n"; print @row;
# [R] new code that seems to work consistent with Win32::ODBC
while (@name)
{
my $name=shift(@name);
my $value=shift(@row);

# remove padding of spaces by DBI
$name=~s/(\s*$)//;
$value=~s/(\s*$)//;

$DataHash{$name}=$value;
};
# -[R]-

# [R] old code that didn't appear to work
# foreach my $name (@name)
# {
# $name=~s/(^\s*)|(\s*$)//;
# my @arr=@$name;
# foreach (@arr)
# {
# print "lot $name name col $_ or ROW= 0 $row[0] 1 $row[1] 2 $row[2] \n ";
# $DataHash{$name}=shift(@row);
# }
# }
# -[R]-

#--- Return Hash
return %DataHash;
}


#EMU --- $db->Error()
sub Error
{
my $self= shift;

if ($self->{'DBI_ERR'} ne '')
{
#--- Return error message
$self->{'DBI_ERRSTR'};
}

#-- else good no error message

}

# [R] provide compatibility with Win32::ODBC's Close() method.
sub Close
{
my $self=shift;

my $dbh=$self->{'DBI_DBH'};
$dbh->disconnect;
}
# -[R]-

1;

__END__

# [R] to -[R]- indicate sections edited by me, Roy Lee

=head1 NAME

Win32::DBIODBC - Win32::ODBC emulation layer for the DBI

=head1 SYNOPSIS

use Win32::DBIODBC; # instead of use Win32::ODBC

=head1 DESCRIPTION

This is a I<very> basic I<very> alpha quality Win32::ODBC emulation
for the DBI. To use it just replace

use Win32::ODBC;

in your scripts with

use Win32::DBIODBC;

or, while experimenting, you can pre-load this module without changing your
scripts by doing

perl -MWin32::DBIODBC your_script_name

=head1 TO DO

Error handling is virtually non-existent.

=head1 AUTHOR

Tom Horen <[email protected]>

=cut