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d7a629df0c
- optimization of compiled code of {foreach} and {for} loops
- change of compiler for config variables
105 lines
3.9 KiB
PHP
105 lines
3.9 KiB
PHP
<?php
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/**
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* Smarty Internal Plugin Config File Compiler
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*
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* This is the config file compiler class. It calls the lexer and parser to
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* perform the compiling.
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*
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* @package Smarty
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* @subpackage Config
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* @author Uwe Tews
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*/
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/**
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* Main config file compiler class
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*/
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class Smarty_Internal_Config_File_Compiler {
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/**
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* Initialize compiler
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*/
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public function __construct($smarty)
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{
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$this->smarty = $smarty;
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// get required plugins
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$this->smarty->loadPlugin('Smarty_Internal_Configfilelexer');
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$this->smarty->loadPlugin('Smarty_Internal_Configfileparser');
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$this->config_data['sections'] = array();
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$this->config_data['vars'] = array();
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}
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/**
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* Methode to compile a Smarty template
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*
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* @param $template template object to compile
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* @return bool true if compiling succeeded, false if it failed
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*/
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public function compileSource($config)
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{
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/* here is where the compiling takes place. Smarty
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tags in the templates are replaces with PHP code,
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then written to compiled files. */
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$this->config = $config;
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// get config file source
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$_content = $config->getConfigSource() . "\n";
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// on empty template just return
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if ($_content == '') {
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return true;
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}
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// init the lexer/parser to compile the config file
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$lex = new Smarty_Internal_Configfilelexer($_content, $this->smarty);
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$parser = new Smarty_Internal_Configfileparser($lex, $this);
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if (isset($this->smarty->_parserdebug)) $parser->PrintTrace();
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// get tokens from lexer and parse them
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while ($lex->yylex()) {
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if (isset($this->smarty->_parserdebug)) echo "<br>Parsing {$parser->yyTokenName[$lex->token]} Token {$lex->value} Line {$lex->line} \n";
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$parser->doParse($lex->token, $lex->value);
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}
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// finish parsing process
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$parser->doParse(0, 0);
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$config->compiled_config = '<?php $_config_vars = ' . var_export($this->config_data, true) . '; ?>';
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}
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/**
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* display compiler error messages without dying
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*
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* If parameter $args is empty it is a parser detected syntax error.
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* In this case the parser is called to obtain information about exspected tokens.
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*
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* If parameter $args contains a string this is used as error message
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*
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* @todo output exact position of parse error in source line
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* @param $args string individual error message or null
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*/
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public function trigger_config_file_error($args = null)
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{
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$this->lex = Smarty_Internal_Configfilelexer::instance();
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$this->parser = Smarty_Internal_Configfileparser::instance();
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// get template source line which has error
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$line = $this->lex->line;
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if (isset($args)) {
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// $line--;
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}
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$match = preg_split("/\n/", $this->lex->data);
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$error_text = "Syntax error in config file '{$this->config->getConfigFilepath()}' on line {$line} '{$match[$line-1]}' ";
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if (isset($args)) {
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// individual error message
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$error_text .= $args;
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} else {
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// exspected token from parser
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foreach ($this->parser->yy_get_expected_tokens($this->parser->yymajor) as $token) {
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$exp_token = $this->parser->yyTokenName[$token];
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if (isset($this->lex->smarty_token_names[$exp_token])) {
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// token type from lexer
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$expect[] = '"' . $this->lex->smarty_token_names[$exp_token] . '"';
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} else {
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// otherwise internal token name
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$expect[] = $this->parser->yyTokenName[$token];
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}
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}
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// output parser error message
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$error_text .= ' - Unexpected "' . $this->lex->value . '", expected one of: ' . implode(' , ', $expect);
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}
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throw new Exception($error_text);
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}
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}
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?>
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