--- /dev/null
+<?php
+
+/**
+ * Quickie parser class that can happily read the subset of PHP we need
+ * for our localization arrays safely.
+ *
+ * Still an order of magnitude slower than eval().
+ */
+class QuickArrayReader {
+ private $vars = [];
+
+ /**
+ * @param $string string
+ */
+ function __construct( $string ) {
+ $scalarTypes = [
+ T_LNUMBER => true,
+ T_DNUMBER => true,
+ T_STRING => true,
+ T_CONSTANT_ENCAPSED_STRING => true,
+ ];
+ $skipTypes = [
+ T_WHITESPACE => true,
+ T_COMMENT => true,
+ T_DOC_COMMENT => true,
+ ];
+ $tokens = token_get_all( $string );
+ $count = count( $tokens );
+ for ( $i = 0; $i < $count; ) {
+ while ( isset( $skipTypes[$tokens[$i][0]] ) ) {
+ $i++;
+ }
+ switch ( $tokens[$i][0] ) {
+ case T_OPEN_TAG:
+ $i++;
+ continue;
+ case T_VARIABLE:
+ // '$messages' -> 'messages'
+ $varname = trim( substr( $tokens[$i][1], 1 ) );
+ $varindex = null;
+
+ while ( isset( $skipTypes[$tokens[++$i][0]] ) ) {
+ }
+
+ if ( $tokens[$i] === '[' ) {
+ while ( isset( $skipTypes[$tokens[++$i][0]] ) ) {
+ }
+
+ if ( isset( $scalarTypes[$tokens[$i][0]] ) ) {
+ $varindex = $this->parseScalar( $tokens[$i] );
+ } else {
+ throw $this->except( $tokens[$i], 'scalar index' );
+ }
+ while ( isset( $skipTypes[$tokens[++$i][0]] ) ) {
+ }
+
+ if ( $tokens[$i] !== ']' ) {
+ throw $this->except( $tokens[$i], ']' );
+ }
+ while ( isset( $skipTypes[$tokens[++$i][0]] ) ) {
+ }
+ }
+
+ if ( $tokens[$i] !== '=' ) {
+ throw $this->except( $tokens[$i], '=' );
+ }
+ while ( isset( $skipTypes[$tokens[++$i][0]] ) ) {
+ }
+
+ if ( isset( $scalarTypes[$tokens[$i][0]] ) ) {
+ $buildval = $this->parseScalar( $tokens[$i] );
+ } elseif ( $tokens[$i][0] === T_ARRAY ) {
+ while ( isset( $skipTypes[$tokens[++$i][0]] ) ) {
+ }
+ if ( $tokens[$i] !== '(' ) {
+ throw $this->except( $tokens[$i], '(' );
+ }
+ $buildval = [];
+ do {
+ while ( isset( $skipTypes[$tokens[++$i][0]] ) ) {
+ }
+
+ if ( $tokens[$i] === ')' ) {
+ break;
+ }
+ if ( isset( $scalarTypes[$tokens[$i][0]] ) ) {
+ $key = $this->parseScalar( $tokens[$i] );
+ }
+ while ( isset( $skipTypes[$tokens[++$i][0]] ) ) {
+ }
+
+ if ( $tokens[$i][0] !== T_DOUBLE_ARROW ) {
+ throw $this->except( $tokens[$i], '=>' );
+ }
+ while ( isset( $skipTypes[$tokens[++$i][0]] ) ) {
+ }
+
+ if ( isset( $scalarTypes[$tokens[$i][0]] ) ) {
+ $val = $this->parseScalar( $tokens[$i] );
+ }
+ wfSuppressWarnings();
+ $buildval[$key] = $val;
+ wfRestoreWarnings();
+ while ( isset( $skipTypes[$tokens[++$i][0]] ) ) {
+ }
+
+ if ( $tokens[$i] === ',' ) {
+ continue;
+ } elseif ( $tokens[$i] === ')' ) {
+ break;
+ } else {
+ throw $this->except( $tokens[$i], ', or )' );
+ }
+ } while ( true );
+ } else {
+ throw $this->except( $tokens[$i], 'scalar or array' );
+ }
+ if ( is_null( $varindex ) ) {
+ $this->vars[$varname] = $buildval;
+ } else {
+ wfSuppressWarnings();
+ $this->vars[$varname][$varindex] = $buildval;
+ wfRestoreWarnings();
+ }
+ while ( isset( $skipTypes[$tokens[++$i][0]] ) ) {
+ }
+ if ( $tokens[$i] !== ';' ) {
+ throw $this->except( $tokens[$i], ';' );
+ }
+ $i++;
+ break;
+ default:
+ throw $this->except( $tokens[$i], 'open tag, whitespace, or variable.' );
+ }
+ }
+ }
+
+ /**
+ * @param $got string
+ * @param $expected string
+ * @return Exception
+ */
+ private function except( $got, $expected ) {
+ if ( is_array( $got ) ) {
+ $got = token_name( $got[0] ) . " ('" . $got[1] . "')";
+ } else {
+ $got = "'" . $got . "'";
+ }
+
+ return new Exception( "Expected $expected, got $got" );
+ }
+
+ /**
+ * Parse a scalar value in PHP
+ *
+ * @param $token string
+ *
+ * @return mixed Parsed value
+ */
+ function parseScalar( $token ) {
+ if ( is_array( $token ) ) {
+ $str = $token[1];
+ } else {
+ $str = $token;
+ }
+ if ( $str !== '' && $str[0] == '\'' ) {
+ // Single-quoted string
+ // @fixme trim() call is due to mystery bug where whitespace gets
+ // appended to the token; without it we ended up reading in the
+ // extra quote on the end!
+ return strtr( substr( trim( $str ), 1, -1 ),
+ [ '\\\'' => '\'', '\\\\' => '\\' ] );
+ }
+
+ wfSuppressWarnings();
+ if ( $str !== '' && $str[0] == '"' ) {
+ // Double-quoted string
+ // @fixme trim() call is due to mystery bug where whitespace gets
+ // appended to the token; without it we ended up reading in the
+ // extra quote on the end!
+ wfRestoreWarnings();
+ return stripcslashes( substr( trim( $str ), 1, -1 ) );
+ }
+ wfRestoreWarnings();
+
+ if ( substr( $str, 0, 4 ) === 'true' ) {
+ return true;
+ }
+
+ if ( substr( $str, 0, 5 ) === 'false' ) {
+ return false;
+ }
+
+ if ( substr( $str, 0, 4 ) === 'null' ) {
+ return null;
+ }
+
+ // Must be some kind of numeric value, so let PHP's weak typing
+ // be useful for a change
+ return $str;
+ }
+
+ /**
+ * @param $varname string
+ * @return null|string
+ */
+ function getVar( $varname ) {
+ if ( isset( $this->vars[$varname] ) ) {
+ return $this->vars[$varname];
+ } else {
+ return null;
+ }
+ }
+}
scripts.mit.edu / autoinstallsdev / mediawiki.git / blobdiff