in source/pdo_sqlsrv/pdo_parser.cpp [186:392]
void conn_string_parser:: parse_conn_string( void )
{
States state = FirstKeyValuePair; // starting state
int start_pos = -1;
try {
while( !this->is_eos() ) {
switch( state ) {
case FirstKeyValuePair:
{
// discard leading spaces
if( !next() || !discard_white_spaces() ) {
THROW_PDO_ERROR( this->ctx, PDO_SQLSRV_ERROR_INVALID_DSN_STRING ); //EOS
}
state = Key;
break;
}
case Key:
{
start_pos = this->pos;
// read the key name
while( this->orig_str[pos] != '=' ) {
if( !next() ) {
THROW_PDO_ERROR( this->ctx, PDO_SQLSRV_ERROR_DSN_STRING_ENDED_UNEXPECTEDLY ); //EOS
}
}
this->validate_key( &( this->orig_str[start_pos] ), ( pos - start_pos ) );
state = Value;
break;
}
case Value:
{
SQLSRV_ASSERT(( this->orig_str[pos] == '=' ), "conn_string_parser:: parse_conn_string: "
"Equal was expected" );
next(); // skip "="
// if EOS encountered after 0 or more spaces OR semi-colon encountered.
if( !discard_white_spaces() || this->orig_str[pos] == ';' ) {
add_key_value_pair( NULL, 0 );
if( this->is_eos() ) {
break; // EOS
}
else {
// this->orig_str[pos] == ';'
state = NextKeyValuePair;
}
}
// if LCB
else if( this->orig_str[pos] == '{' ) {
start_pos = this->pos; // starting character is LCB
state = ValueContent1;
}
// If NonSP-LCB-SC
else {
start_pos = this->pos;
state = ValueContent2;
}
break;
}
case ValueContent1:
{
while ( this->orig_str[pos] != '}' ) {
if ( ! next() ) {
THROW_PDO_ERROR( this->ctx, PDO_SQLSRV_ERROR_RCB_MISSING_IN_DSN_VALUE, this->current_key_name );
}
}
// If we reached here than RCB encountered
state = RCBEncountered;
break;
}
case ValueContent2:
{
while( this->orig_str[pos] != ';' ) {
if( ! next() ) {
break; //EOS
}
}
if( !this->is_eos() && this->orig_str[pos] == ';' ) {
// semi-colon encountered, so go to next key-value pair
state = NextKeyValuePair;
}
add_key_value_pair( &( this->orig_str[start_pos] ), this->pos - start_pos );
SQLSRV_ASSERT((( state == NextKeyValuePair ) || ( this->is_eos() )),
"conn_string_parser::parse_conn_string: Invalid state encountered " );
break;
}
case RCBEncountered:
{
// Read the next character after RCB.
if( !next() ) {
// EOS
add_key_value_pair( &( this->orig_str[start_pos] ), this->pos - start_pos );
break;
}
SQLSRV_ASSERT( !this->is_eos(), "conn_string_parser::parse_conn_string: Unexpected EOS encountered" );
// if second RCB encountered than go back to ValueContent1
if( this->orig_str[pos] == '}' ) {
if( !next() ) {
// EOS after a second RCB is error
THROW_PDO_ERROR( this->ctx, SQLSRV_ERROR_UNESCAPED_RIGHT_BRACE_IN_DSN, this->current_key_name );
}
state = ValueContent1;
break;
}
int end_pos = this->pos;
// discard any trailing white-spaces.
if( this->is_white_space( this->orig_str[pos] )) {
if( ! this->discard_white_spaces() ) {
//EOS
add_key_value_pair( &( this->orig_str[start_pos] ), end_pos - start_pos );
break;
}
}
// if semi-colon than go to next key-value pair
if ( this->orig_str[pos] == ';' ) {
add_key_value_pair( &( this->orig_str[start_pos] ), end_pos - start_pos );
state = NextKeyValuePair;
break;
}
// Non - (RCB, SP*, SC, EOS) character. Any other character after an RCB is an error.
THROW_PDO_ERROR( this->ctx, PDO_SQLSRV_ERROR_INVALID_DSN_VALUE, this->current_key_name );
break;
}
case NextKeyValuePair:
{
SQLSRV_ASSERT(( this->orig_str[pos] == ';' ),
"conn_string_parser::parse_conn_string: semi-colon was expected." );
// Call next() to skip the semi-colon.
if( !next() || !this->discard_white_spaces() ) {
// EOS
break;
}
if( this->orig_str[pos] == ';' ) {
// a second semi-colon is error case.
THROW_PDO_ERROR( this->ctx, PDO_SQLSRV_ERROR_EXTRA_SEMI_COLON_IN_DSN_STRING, this->pos );
}
else {
// any other character leads to the next key
state = Key;
break;
}
} //case NextKeyValuePair
} // switch
} //while
}
catch( pdo::PDOException& ) {
throw;
}
}