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<?php
/**
* `VALUES` keyword parser.
*
* @package SqlParser
* @subpackage Components
*/
namespace SqlParser\Components;
use SqlParser\Component;
use SqlParser\Parser;
use SqlParser\Token;
use SqlParser\TokensList;
/**
* `VALUES` keyword parser.
*
* @category Keywords
* @package SqlParser
* @subpackage Components
* @author Dan Ungureanu <udan1107@gmail.com>
* @license http://opensource.org/licenses/GPL-2.0 GNU Public License
*/
class Array2d extends Component
{
/**
* @param Parser $parser The parser that serves as context.
* @param TokensList $list The list of tokens that are being parsed.
* @param array $options Parameters for parsing.
*
* @return ArrayObj[]
*/
public static function parse(Parser $parser, TokensList $list, array $options = array())
{
$ret = array();
/**
* The number of values in each set.
*
* @var int $count
*/
$count = -1;
/**
* The state of the parser.
*
* Below are the states of the parser.
*
* 0 ----------------------[ array ]----------------------> 1
*
* 1 ------------------------[ , ]------------------------> 0
* 1 -----------------------[ else ]----------------------> (END)
*
* @var int $state
*/
$state = 0;
for (; $list->idx < $list->count; ++$list->idx) {
/**
* Token parsed at this moment.
*
* @var Token $token
*/
$token = $list->tokens[$list->idx];
// End of statement.
if ($token->type === Token::TYPE_DELIMITER) {
break;
}
// Skipping whitespaces and comments.
if (($token->type === Token::TYPE_WHITESPACE) || ($token->type === Token::TYPE_COMMENT)) {
continue;
}
// No keyword is expected.
if (($token->type === Token::TYPE_KEYWORD) && ($token->flags & Token::FLAG_KEYWORD_RESERVED)) {
break;
}
if ($state === 0) {
if ($token->value === '(') {
$arr = ArrayObj::parse($parser, $list, $options);
$arrCount = count($arr->values);
if ($count === -1) {
$count = $arrCount;
} elseif ($arrCount != $count) {
$parser->error(
sprintf(
__('%1$d values were expected, but found %2$d.'),
$count,
$arrCount
),
$token
);
}
$ret[] = $arr;
$state = 1;
} else {
break;
}
} elseif ($state === 1) {
if ($token->value === ',') {
$state = 0;
} else {
break;
}
}
}
if ($state === 0) {
$parser->error(
__('An opening bracket followed by a set of values was expected.'),
$list->tokens[$list->idx]
);
}
--$list->idx;
return $ret;
}
/**
* @param ArrayObj[] $component The component to be built.
* @param array $options Parameters for building.
*
* @return string
*/
public static function build($component, array $options = array())
{
return ArrayObj::build($component);
}
}