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| 1 | <?php declare( strict_types=1 ); |
| 2 | |
| 3 | namespace SecurityCheckPlugin; |
| 4 | |
| 5 | use ast\Node; |
| 6 | |
| 7 | /** |
| 8 | * Links for a single method |
| 9 | */ |
| 10 | class SingleMethodLinks { |
| 11 | /** |
| 12 | * @var ParamLinksOffsets[] |
| 13 | */ |
| 14 | private $params = []; |
| 15 | |
| 16 | /** |
| 17 | * @param int $i |
| 18 | * @return self |
| 19 | */ |
| 20 | public static function newWithParam( int $i ): self { |
| 21 | $ret = new self; |
| 22 | $ret->addParam( $i ); |
| 23 | return $ret; |
| 24 | } |
| 25 | |
| 26 | /** |
| 27 | * @param int $i |
| 28 | */ |
| 29 | public function addParam( int $i ): void { |
| 30 | $this->params[$i] = ParamLinksOffsets::newAll(); |
| 31 | } |
| 32 | |
| 33 | /** |
| 34 | * @param self $other |
| 35 | */ |
| 36 | public function mergeWith( self $other ): void { |
| 37 | foreach ( $other->params as $i => $otherPar ) { |
| 38 | if ( isset( $this->params[$i] ) ) { |
| 39 | $this->params[$i]->mergeWith( $otherPar ); |
| 40 | } else { |
| 41 | $this->params[$i] = $otherPar; |
| 42 | } |
| 43 | } |
| 44 | } |
| 45 | |
| 46 | /** |
| 47 | * @param Node|string|int|null $offset |
| 48 | */ |
| 49 | public function pushOffsetToAll( $offset ): void { |
| 50 | foreach ( $this->params as $i => $_ ) { |
| 51 | $this->params[$i]->pushOffset( $offset ); |
| 52 | } |
| 53 | } |
| 54 | |
| 55 | /** |
| 56 | * @return self |
| 57 | */ |
| 58 | public function asAllParamsMovedToKeys(): self { |
| 59 | $ret = new self; |
| 60 | foreach ( $this->params as $i => $offsets ) { |
| 61 | $ret->params[$i] = $offsets->asMovedToKeys(); |
| 62 | } |
| 63 | return $ret; |
| 64 | } |
| 65 | |
| 66 | /** |
| 67 | * @todo Try to avoid this method |
| 68 | * @return ParamLinksOffsets[] |
| 69 | */ |
| 70 | public function getParams(): array { |
| 71 | return $this->params; |
| 72 | } |
| 73 | |
| 74 | /** |
| 75 | * @param int $x |
| 76 | * @return bool |
| 77 | */ |
| 78 | public function hasParam( int $x ): bool { |
| 79 | return isset( $this->params[$x] ); |
| 80 | } |
| 81 | |
| 82 | /** |
| 83 | * @note This will fail hard if unset. |
| 84 | * @param int $x |
| 85 | * @return ParamLinksOffsets |
| 86 | */ |
| 87 | public function getParamOffsets( int $x ): ParamLinksOffsets { |
| 88 | return $this->params[$x]; |
| 89 | } |
| 90 | |
| 91 | /** |
| 92 | * @param int[] $params |
| 93 | */ |
| 94 | public function keepOnlyParams( array $params ): void { |
| 95 | $this->params = array_intersect_key( $this->params, array_fill_keys( $params, 1 ) ); |
| 96 | } |
| 97 | |
| 98 | /** |
| 99 | * @note This should only be used by MethodLinks::getAllPreservedFlags |
| 100 | * @return int |
| 101 | */ |
| 102 | public function getAllPreservedFlags(): int { |
| 103 | $ret = SecurityCheckPlugin::NO_TAINT; |
| 104 | foreach ( $this->params as $offsets ) { |
| 105 | $ret |= $offsets->getFlagsRecursively(); |
| 106 | } |
| 107 | return $ret; |
| 108 | } |
| 109 | |
| 110 | public function __clone() { |
| 111 | foreach ( $this->params as $k => $val ) { |
| 112 | $this->params[$k] = clone $val; |
| 113 | } |
| 114 | } |
| 115 | |
| 116 | /** |
| 117 | * @return string |
| 118 | */ |
| 119 | public function __toString(): string { |
| 120 | $paramBits = []; |
| 121 | foreach ( $this->params as $k => $paramOffsets ) { |
| 122 | $paramBits[] = "$k: { " . $paramOffsets->__toString() . ' }'; |
| 123 | } |
| 124 | return '[ ' . implode( ', ', $paramBits ) . ' ]'; |
| 125 | } |
| 126 | } |