{
return new self( $doctype_name, $doctype_public_id, $doctype_system_id, false );
}
/*
* "After DOCTYPE name state"
*
* Find a case-insensitive match for "PUBLIC" or "SYSTEM" at this point.
* Otherwise, set force-quirks and enter bogus DOCTYPE state (skip the rest of the doctype).
*
* @see https://html.spec.whatwg.org/#after-doctype-name-state
*/
if ( $at + 6 >= $end ) {
return new self( $doctype_name, $doctype_public_id, $doctype_system_id, true );
}
/*
* > If the six characters starting from the current input character are an ASCII
* > case-insensitive match for the word "PUBLIC", then consume those characters
* > and switch to the after DOCTYPE public keyword state.
*/
if ( 0 === substr_compare( $doctype_html, 'PUBLIC', $at, 6, true ) ) {
$at += 6;
$at += strspn( $doctype_html, " \t\n\f\r", $at, $end - $at );
if ( $at >= $end ) {
return new self( $doctype_name, $doctype_public_id, $doctype_system_id, true );
}
goto parse_doctype_public_identifier;
}
/*
* > Otherwise, if the six characters starting from the current input character are an ASCII
* > case-insensitive match for the word "SYSTEM", then consume those characters and switch
* > to the after DOCTYPE system keyword state.
*/
if ( 0 === substr_compare( $doctype_html, 'SYSTEM', $at, 6, true ) ) {
$at += 6;
$at += strspn( $doctype_html, " \t\n\f\r", $at, $end - $at );
if ( $at >= $end ) {
return new self( $doctype_name, $doctype_public_id, $doctype_system_id, true );
}
goto parse_doctype_system_identifier;
}
/*
* > Otherwise, this is an invalid-character-sequence-after-doctype-name parse error.
* > Set the current DOCTYPE token's force-quirks flag to on. Reconsume in the bogus
* > DOCTYPE state.
*/
return new self( $doctype_name, $doctype_public_id, $doctype_system_id, true );
parse_doctype_public_identifier:
/*
* The parser should enter "DOCTYPE public identifier (double-quoted) state" or
* "DOCTYPE public identifier (single-quoted) state" by finding one of the valid quotes.
* Anything else forces quirks mode and ignores the rest of the contents.
*
* @see https://html.spec.whatwg.org/#doctype-public-identifier-(double-quoted)-state
* @see https://html.spec.whatwg.org/#doctype-public-identifier-(single-quoted)-state
*/
$closer_quote = $doctype_html[ $at ];
/*
* > This is a missing-quote-before-doctype-public-identifier parse error. Set the
* > current DOCTYPE token's force-quirks flag to on. Reconsume in the bogus DOCTYPE state.
*/
if ( '"' !== $closer_quote && "'" !== $closer_quote ) {
return new self( $doctype_name, $doctype_public_id, $doctype_system_id, true );
}
++$at;
$identifier_length = strcspn( $doctype_html, $closer_quote, $at, $end - $at );
$doctype_public_id = str_replace( "\0", "\u{FFFD}", substr( $doctype_html, $at, $identifier_length ) );
$at += $identifier_length;
if ( $at >= $end || $closer_quote !== $doctype_html[ $at ] ) {
return new self( $doctype_name, $doctype_public_id, $doctype_system_id, true );
}
++$at;
/*
* "Between DOCTYPE public and system identifiers state"
*
* Advance through whitespace between public and system identifiers.
*
* @see https://html.spec.whatwg.org/#between-doctype-public-and-system-identifiers-state
*/
$at += strspn( $doctype_html, " \t\n\f\r", $at, $end - $at );
if ( $at >= $end ) {
return new self( $doctype_name, $doctype_public_id, $doctype_system_id, false );
}
parse_doctype_system_identifier:
/*
* The parser should enter "DOCTYPE system identifier (double-quoted) state" or
* "DOCTYPE system identifier (single-quoted) state" by finding one of the valid quotes.
* Anything else forces quirks mode and ignores the rest of the contents.
*
* @see https://html.spec.whatwg.org/#doctype-system-identifier-(double-quoted)-state
* @see https://html.spec.whatwg.org/#doctype-system-identifier-(single-quoted)-state
*/
$closer_quote = $doctype_html[ $at ];
/*
* > This is a missing-quote-before-doctype-system-identifier parse error. Set the
* > current DOCTYPE token's force-quirks flag to on. Reconsume in the bogus DOCTYPE state.
*/
if ( '"' !== $closer_quote && "'" !== $closer_quote ) {
return new self( $doctype_name, $doctype_public_id, $doctype_system_id, true );
}
++$at;
$identifier_length = strcspn( $doctype_html, $closer_quote, $at, $end - $at );
$doctype_system_id = str_replace( "\0", "\u{FFFD}", substr( $doctype_html, $at, $identifier_length ) );
$at += $identifier_length;
if ( $at >= $end || $closer_quote !== $doctype_html[ $at ] ) {
return new self( $doctype_name, $doctype_public_id, $doctype_system_id, true );
}
return new self( $doctype_name, $doctype_public_id, $doctype_system_id, false );
}
}
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