summaryrefslogtreecommitdiff
path: root/transform.php
diff options
context:
space:
mode:
Diffstat (limited to 'transform.php')
-rw-r--r--transform.php996
1 files changed, 0 insertions, 996 deletions
diff --git a/transform.php b/transform.php
deleted file mode 100644
index bd6efea..0000000
--- a/transform.php
+++ /dev/null
@@ -1,996 +0,0 @@
-<?php
-
-namespace ste;
-
-class TextNode
-{
- public $text;
-}
-
-class TagNode
-{
- public $name;
- public $params;
- public $sub;
-}
-
-class VariableNode
-{
- public $name;
- public $arrayfields;
- public function transcompile()
- {
- $varaccess = '@$ste->vars[' . (is_numeric($this->name) ? $this->name : '\'' . escape_text($this->name) . '\''). ']';
- foreach($this->arrayfields as $af)
- {
- if((count($af) == 1) and ($af[0] instanceof TextNode) and is_numeric($af->text))
- $varaccess .= '[' . $af->text . ']';
- else
- $varaccess .= '[' . implode(".",
- array_map(
- function($node)
- {
- if($node instanceof TextNode)
- return "\"" . escape_text($node->text) . "\"";
- else if($node instanceof VariableNode)
- return $node->transcompile;
- }, $af
- )
- ). ']';
- }
- return $varaccess;
- }
-}
-
-/* $text must start after the first opening bracket */
-function find_closing_bracket($text, $opening, $closing)
-{
- $counter = 1;
- $len = strlen($text);
- for($i = 0; $i < $len; ++$i)
- {
- switch($text[$i])
- {
- case $opening:
- ++$counter;
- break;
- case $closing:
- --$counter;
- break;
- }
- if($counter == 0)
- break;
- }
-
- if($counter > 0)
- throw new \Exception("Missing closing \"$closing\". Stop.");
-
- return $i;
-}
-
-function unescape_text($text)
-{
- $text = preg_replace("/(?:(?<!\\\\)\\\\\\\$)/s", "$", $text);
- return str_replace("\\\\", "\\", $text);
-}
-
-function tokenize_text($text)
-{
- $tokens = array();
- /* Find next non-escaped $-char */
- if(preg_match("/(?:(?<!\\\\)\\$)/s", $text, $match, PREG_OFFSET_CAPTURE) == 0)
- {
- $node = new TextNode();
- $node->text = unescape_text($text);
- return (strlen($node->text) == 0) ? array() : array($node);
- }
-
- if($match[0][1] > 0)
- {
- $node = new TextNode();
- $node->text = unescape_text(substr($text, 0, $match[0][1]));
- $tokens[] = $node;
- }
-
- if($text[$match[0][1] + 1] == "{")
- {
- $varend = find_closing_bracket(substr($text, $match[0][1] + 2), "{", "}") + $match[0][1] + 2;
- return array_merge(
- $tokens,
- tokenize_text("\$" . substr($text, $match[0][1] + 2, ($varend - 1) - ($match[0][1] + 1))),
- tokenize_text(substr($text, $varend + 1))
- );
- }
-
- $text = substr($text, $match[0][1] + 1);
- if(preg_match("/^[a-zA-Z0-9_]+/s", $text, $match, PREG_OFFSET_CAPTURE) == 0)
- {
- $nexttokens = tokenize_text($text);
- if($nexttokens[0] instanceof Text)
- $nexttokens[0]->text = "\$" . $nexttokens[0]->text;
- else
- {
- $node = new TextNode();
- $node->text = "\$";
- $tokens[] = $node;
- }
- return array_merge($tokens, $nexttokens);
- }
-
- $node = new VariableNode();
- $node->name = $match[0][0];
- $node->arrayfields = array();
-
- $text = substr($text, $match[0][1] + strlen($match[0][0]));
- while(@$text[0] == "[")
- {
- $text = substr($text, 1);
- $fieldend = find_closing_bracket($text, "[", "]");
- $node->arrayfields[] = tokenize_text(substr($text, 0, $fieldend));
- $text = substr($text, $fieldend + 1);
- }
-
- $tokens[] = $node;
-
- return strlen($text) > 0 ? array_merge($tokens, tokenize_text($text)) : $tokens;
-}
-
-function mk_ast($code)
-{
- $ast = array();
-
- if(preg_match("/\\<\\s*ste:([a-zA-Z0-9_]*)/s", $code, $matches, PREG_OFFSET_CAPTURE) == 0)
- return tokenize_text($code);
-
- $ast = tokenize_text(substr($code, 0, $matches[0][1]));
-
- $tag = new TagNode();
- $tag->name = $matches[1][0];
-
- $code = substr($code, $matches[0][1] + strlen($matches[0][0]));
-
- $tag->params = array();
-
- while(preg_match("/^\\s+([a-zA-Z0-9_]+)=((?:\"(?:.*?)(?<!\\\\)\")|(?:'(?:.*?)(?<!\\\\)'))/s", $code, $matches, PREG_OFFSET_CAPTURE) > 0)
- {
- $paramval = substr($code, $matches[2][1] + 1, strlen($matches[2][0]) - 2);
- $paramval = str_replace("\\\"", "\"", $paramval);
- $paramval = str_replace("\\'", "'", $paramval);
- $tag->params[$matches[1][0]] = tokenize_text($paramval);
- $code = substr($code, strlen($matches[0][0]));
- }
-
- if(preg_match("/^\\s*([\\/]?)\\s*\\>/s", $code, $matches) == 0)
- throw new \Exception("Missing closing '>' in \"" . $tag->name . "\"-Tag. Stop. (:::CODE START:::$code:::CODE END:::)");
-
- $code = substr($code, strlen($matches[0]));
-
- $tag->sub = array();
-
- if($matches[1][0] != "/")
- {
- $tags_open = 1;
- $off = 0;
- $last_tag_start = 0;
- while(preg_match("/\\<((?:\\s*)|(?:\\s*\\/\\s*))ste:([a-zA-Z0-9_]*)(?:\\s+(?:[a-zA-Z0-9_]+)=(?:(?:\"(?:.*?)(?<!\\\\)\")|(?:'(?:.*?)(?<!\\\\)')))*((?:\\s*)|(?:\\s*\\/\\s*))\\>/s", $code, $matches, PREG_OFFSET_CAPTURE, $off) > 0) /* RegEx from hell! Matches all <ste:> Tags. Opening, closing and self-closing ones. */
- {
- if(trim($matches[3][0]) != "/")
- {
- $closingtag = trim($matches[1][0]);
- if($closingtag[0] == "/")
- $tags_open--;
- else
- $tags_open++;
- }
- $last_tag_start = $matches[0][1];
- $off = $last_tag_start + strlen($matches[0][0]);
- if($tags_open == 0)
- break;
- }
-
- if(($tags_open != 0) or ($tag->name != $matches[2][0]))
- throw new \Exception("Missing closing \"ste:" . $tag->name . "\"-Tag. Stop.");
-
- if($tag->name == "rawtext")
- {
- $tag = new TextNode();
- $tag->text = substr($code, 0, $last_tag_start);
- }
- else
- $tag->sub = mk_ast(substr($code, 0, $last_tag_start));
- $code = substr($code, $off);
- }
-
- $ast[] = $tag;
- return array_merge($ast, strlen($code) > 0 ? mk_ast($code) : array());
-}
-
-function parse($code)
-{
- /* Precompiling... */
- $code = preg_replace("/\\<\\s*ste:comment\\s*\\>.*?\\<\\s*\\/\\s*ste:comment\\s*\\>/s", "", $code); /* Remove comments */
- $code = preg_replace( /* Transform short form of if-clause (?{cond|then|else}) to long form */
- "/(?:(?<!\\\\)\\?)(?:(?<!\\\\)\\{)(.*?)(?:(?<!\\\\)\\|)(.*?)(?:(?<!\\\\)\\|)(.*?)(?:(?<!\\\\)\\})/s",
- "<ste:if>\$1<ste:then>\$2</ste:then><ste:else>\$3</ste:else></ste:if>",
- $code
- );
- /* Unescape \? \{ \} \| */
- $code = preg_replace("/(?:(?<!\\\\)\\\\\\?)/s", "?", $code);
- $code = preg_replace("/(?:(?<!\\\\)\\\\\\{)/s", "{", $code);
- $code = preg_replace("/(?:(?<!\\\\)\\\\\\})/s", "}", $code);
- $code = preg_replace("/(?:(?<!\\\\)\\\\\\|)/s", "|", $code);
-
- /* Create abstract syntax tree */
- return mk_ast($code);
-}
-
-define("MODE_SOURCE", 0);
-define("MODE_TRANSCOMPILED", 1);
-
-interface StorageAccess
-{
- public function load($tpl, &$mode);
- public function save($tpl, $data, $mode);
-}
-
-class FilesystemStorageAccess implements StorageAccess
-{
- protected $sourcedir;
- protected $transcompileddir;
-
- public function __construct($src, $transc)
- {
- $this->sourcedir = $src;
- $this->transcompileddir = $transc;
- }
-
- public function load($tpl, &$mode)
- {
- $src_fn = $this->sourcedir . "/" . $tpl;
- $transc_fn = $this->transcompileddir . "/" . $tpl . ".php";
-
- if($mode == MODE_SOURCE)
- {
- $content = @file_get_contents($src_fn);
- if($content === False)
- throw new \Exception("Template not found.");
- return $content;
- }
-
- $src_stat = @stat($src_fn);
- $transc_stat = @stat($transc_fn);
-
- if(($src_stat === False) and ($transc_stat === False))
- throw new \Exception("Template not found.");
- else if($transc_stat === False)
- {
- $mode = MODE_SOURCE;
- return file_get_contents($src_fn);
- }
- else if($src_stat === False)
- {
- include($transc_fn);
- return $transcompile_fx;
- }
- else
- {
- if($src_stat["mtime"] > $transc_stat["mtime"])
- {
- $mode = MODE_SOURCE;
- return file_get_contents($src_fn);
- }
- else
- {
- include($transc_fn);
- return $transcompile_fx;
- }
- }
- }
-
- public function save($tpl, $data, $mode)
- {
- $fn = (($mode == MODE_SOURCE) ? $this->sourcedir : $this->transcompileddir) . "/" . $tpl . (($mode == MODE_TRANSCOMPILED) ? ".php" : "");
- @mkdir(dirname($fn), 0777, True);
- file_put_contents($fn, "<?php \$transcompile_fx = $data; ?>");
- chmod($fn, 0777); /* FIXME: Remove this line after debugging... */
- }
-}
-
-function indent_code($code)
-{
- return implode(
- "\n",
- array_map(
- function($line) { return "\t$line"; },
- explode("\n", $code)
- )
- );
-}
-
-/* We could also just eval() the $infix_math code, but this is much cooler :-D (Parser inception) */
-function shunting_yard($infix_math)
-{
- $operators = array(
- "+" => array("l", 2),
- "-" => array("l", 2),
- "*" => array("l", 3),
- "/" => array("l", 3),
- "^" => array("r", 4),
- "_" => array("r", 5),
- "(" => array("", 0),
- ")" => array("", 0)
- );
-
- preg_match_all("/\s*(?:(?:[+\\-\\*\\/\\^\\(\\)])|(\\d*[\\.]?\\d*))\\s*/s", $infix_math, $tokens, PREG_PATTERN_ORDER);
- $tokens_raw = array_filter(array_map('trim', $tokens[0]), function($x) { return ($x === "0") or (!empty($x)); });
- $output_queue = array();
- $op_stack = array();
-
- $lastpriority = NULL;
- /* Make - unary, if neccessary */
- $tokens = array();
- foreach($tokens_raw as $token)
- {
- $priority = isset($operators[$token]) ? $operators[$token][1] : -1;
- if(($token == "-") and (($lastpriority === NULL) or ($lastpriority >= 0)))
- {
- $priority = $operators["_"][1];
- $tokens[] = "_";
- }
- else
- $tokens[] = $token;
- $lastpriority = $priority;
- }
-
- while(!empty($tokens))
- {
- $token = array_shift($tokens);
- if(is_numeric($token))
- $output_queue[] = $token;
- else if($token == "(")
- $op_stack[] = $token;
- else if($token == ")")
- {
- $lbr_found = False;
- while(!empty($op_stack))
- {
- $op = array_pop($op_stack);
- if($op == "(")
- {
- $lbr_found = True;
- break;
- }
- $output_queue[] = $op;
- }
- if(!$lbr_found)
- throw new \Exception("Bracket mismatch.");
- }
- else if(!isset($operators[$token]))
- throw new \Exception("Invalid token ($token): Not a number, bracket or operator. Stop.");
- else
- {
- $priority = $operators[$token][1];
- if($operators[$token][0] == "l")
- while((!empty($op_stack)) and ($priority <= $operators[$op_stack[count($op_stack)-1]][1]))
- $output_queue[] = array_pop($op_stack);
- else
- while((!empty($op_stack)) and ($priority < $operators[$op_stack[count($op_stack)-1]][1]))
- $output_queue[] = array_pop($op_stack);
- $op_stack[] = $token;
- }
- }
-
- while(!empty($op_stack))
- {
- $op = array_pop($op_stack);
- if($op == "(")
- throw new \Exception("Bracket mismatch...");
- $output_queue[] = $op;
- }
-
- return $output_queue;
-}
-
-function pop2(&$array)
-{
- $rv = array(array_pop($array), array_pop($array));
- if(array_search(NULL, $rv, True) !== False)
- throw new \Exception("Not enough numbers on stack. Invalid formula.");
- return $rv;
-}
-
-function calc_rpn($rpn)
-{
- $stack = array();
- foreach($rpn as $token)
- {
- switch($token)
- {
- case "+":
- list($b, $a) = pop2($stack);
- $stack[] = $a + $b;
- break;
- case "-":
- list($b, $a) = pop2($stack);
- $stack[] = $a - $b;
- break;
- case "*":
- list($b, $a) = pop2($stack);
- $stack[] = $a * $b;
- break;
- case "/":
- list($b, $a) = pop2($stack);
- $stack[] = $a / $b;
- break;
- case "^":
- list($b, $a) = pop2($stack);
- $stack[] = pow($a, $b);
- break;
- case "_":
- $a = array_pop($stack);
- if($a === NULL)
- throw new \Exception("Not enough numbers on stack. Invalid formula.");
- $stack[] = -$a;
- break;
- default:
- $stack[] = $token;
- break;
- }
- }
- return array_pop($stack);
-}
-
-function loopbody($code)
-{
- return "try\n{\n" . indent_code($code) . "\n}\ncatch(\ste\BreakException \$e) { break; }\ncatch(\ste\ContinueException \$e) { continue; }\n";
-}
-
-$ste_builtins = array(
- "if" => function($ast)
- {
- $output = "";
- $condition = array();
- $then = array();
- $else = array();
-
- foreach($ast->sub as $node)
- {
- if(($node instanceof TagNode) and ($node->name == "then"))
- $then = $node->sub;
- else if(($node instanceof TagNode) and ($node->name == "else"))
- $else = $node->sub;
- else
- $condition[] = $node;
- }
-
- if(empty($then))
- throw new \Exception("Transcompile error: Missing <ste:else> in <ste:if>. Stop.");
-
- $output .= "\$outputstack[] = \"\";\n\$outputstack_i++;\n";
- $output .= _transcompile($condition);
- $output .= "\$outputstack_i--;\nif(\$ste->evalbool(array_pop(\$outputstack)))\n{\n";
- $output .= indent_code(_transcompile($then));
- $output .= "\n}\n";
- if(!empty($else))
- {
- $output .= "else\n{\n";
- $output .= indent_code(_transcompile($else));
- $output .= "\n}\n";
- }
- return $output;
- },
- "cmp" => function($ast)
- {
- $code = "";
-
- $code .= "\$outputstack[] = '';\n\$outputstack_i++;\n";
- if(isset($ast->params["var_b"]))
- {
- $code .= _transcompile($ast->params["var_b"]);
- $b = '$ste->get_var_by_name(array_pop($outputstack))';
- }
- else if(isset($ast->params["text_b"]))
- {
- $code .= _transcompile($ast->params["text_b"]);
- $b = 'array_pop($outputstack)';
- }
- else
- throw new \Exception("Transcompile error: neiter var_b nor text_b set in <ste:cmp>. Stop.");
-
- $code .= "\$outputstack[] = '';\n\$outputstack_i++;\n";
- if(isset($ast->params["var_a"]))
- {
- $code .= _transcompile($ast->params["var_a"]);
- $a = '$ste->get_var_by_name(array_pop($outputstack))';
- }
- else if(isset($ast->params["text_a"]))
- {
- $code .= _transcompile($ast->params["text_a"]);
- $a = 'array_pop($outputstack)';
- }
- else
- throw new \Exception("Transcompile error: neiter var_a nor text_a set in <ste:cmp>. Stop.");
-
- $code .= "\$outputstack[] = '';\n\$outputstack_i++;\n";
- if(isset($ast->params["op"]))
- $code .= _transcompile($ast->params["op"]);
- else
- throw new \Exception("Transcompile error: op not given in <ste:cmp>. Stop.");
-
- $code .= "\$outputstack_i -= 3;\nswitch(trim(array_pop(\$outputstack)))\n{\n\t";
- $code .= implode("", array_map(
- function($op) use ($a,$b)
- {
- list($op_stetpl, $op_php) = $op;
- return "case '$op_stetpl':\n\t\$outputstack[\$outputstack_i] .= (($a) $op_php ($b)) ? 'yes' : '';\n\tbreak;\n\t";
- },
- array(
- array('eq', '=='),
- array('neq', '!='),
- array('lt', '<'),
- array('lte', '<='),
- array('gt', '>'),
- array('gte', '>=')
- )
- ));
- $code .= "default: throw new \Exception('Runtime Error: Unknown operator in <ste:cmp>.');\n}\n";
- return $code;
- },
- "not" => function($ast)
- {
- $code = "\$outputstack[] = '';\n\$outputstack_i++;\n";
- $code .= _transcompile($ast->sub);
- $code .= "\$outputstack_i--;\n\$outputstack[\$outputstack_i] .= (!\$ste->evalbool(array_pop(\$outputstack))) ? 'yes' : '';\n";
- return $code;
- },
- "even" => function($ast)
- {
- $code = "\$outputstack[] = '';\n\$outputstack_i++;\n";
- $code .= _transcompile($ast->sub);
- $code .= "\$outputstack_i--;\n\$tmp_even = array_pop(\$outputstack);\n\$outputstack[\$outputstack_i] .= (is_numeric(\$tmp_even) and (\$tmp_even % 2 == 0)) ? 'yes' : '';\n";
- return $code;
- },
- "for" => function($ast)
- {
- $code = "";
- $loopname = "forloop_" . str_replace(".", "_", uniqid("",True));
- if(empty($ast->params["start"]))
- throw new \Exception("Transcompile error: Missing 'start' parameter in <ste:for>. Stop.");
- $code .= "\$outputstack[] = '';\n\$outputstack_i++;\n";
- $code .= _transcompile($ast->params["start"]);
- $code .= "\$outputstack_i--;\n\$${loopname}_start = array_pop(\$outputstack);\n";
-
- if(empty($ast->params["stop"]))
- throw new \Exception("Transcompile error: Missing 'end' parameter in <ste:for>. Stop.");
- $code .= "\$outputstack[] = '';\n\$outputstack_i++;\n";
- $code .= _transcompile($ast->params["stop"]);
- $code .= "\$outputstack_i--;\n\$${loopname}_stop = array_pop(\$outputstack);\n";
-
- if(empty($ast->params["step"]))
- $code .= "\$${loopname}_step = 1;\n";
- else
- {
- $code .= "\$outputstack[] = '';\n\$outputstack_i++;\n";
- $code .= _transcompile($ast->params["step"]);
- $code .= "\$outputstack_i--;\n\$${loopname}_step = array_pop(\$outputstack);\n";
- }
-
- if(!empty($ast->params["counter"]))
- {
- $code .= "\$outputstack[] = '';\n\$outputstack_i++;\n";
- $code .= _transcompile($ast->params["counter"]);
- $code .= "\$outputstack_i--;\n\$${loopname}_countername = array_pop(\$outputstack);\n";
- }
-
- $loopbody = empty($ast->params["counter"]) ? "" : "\$ste->set_var_by_name(\$${loopname}_countername, \$${loopname}_counter);\n";
- $loopbody .= _transcompile($ast->sub);
- $loopbody = indent_code("{\n" . loopbody(indent_code($loopbody)) . "\n}\n");
-
- $code .= "if(\$${loopname}_step == 0)\n\tthrow new \Exception('Runtime Error: step can not be 0 in <ste:for>. Stop.');\n";
- $code .= "if(\$${loopname}_step > 0)\n{\n";
- $code .= "\tfor(\$${loopname}_counter = \$${loopname}_start; \$${loopname}_counter <= \$${loopname}_stop; \$${loopname}_counter += \$${loopname}_step)\n";
- $code .= $loopbody;
- $code .= "\n}\nelse\n{\n";
- $code .= "\tfor(\$${loopname}_counter = \$${loopname}_start; \$${loopname}_counter >= \$${loopname}_stop; \$${loopname}_counter += \$${loopname}_step)\n";
- $code .= $loopbody;
- $code .= "\n}\n";
-
- return $code;
- },
- "foreach" => function($ast)
- {
- $loopname = "foreachloop_" . str_replace(".", "_", uniqid("",True));
- $code = "";
-
- if(empty($ast->params["array"]))
- throw new \Exception("Transcompile Error: array not givein in <ste:foreach>. Stop.");
- $code .= "\$outputstack[] = '';\n\$outputstack_i++;\n";
- $code .= _transcompile($ast->params["array"]);
- $code .= "\$outputstack_i--;\n\$${loopname}_arrayvar = array_pop(\$outputstack);\n";
-
- if(empty($ast->params["value"]))
- throw new \Exception("Transcompile Error: value not givein in <ste:foreach>. Stop.");
- $code .= "\$outputstack[] = '';\n\$outputstack_i++;\n";
- $code .= _transcompile($ast->params["value"]);
- $code .= "\$outputstack_i--;\n\$${loopname}_valuevar = array_pop(\$outputstack);\n";
-
- if(!empty($ast->params["key"]))
- {
- $code .= "\$outputstack[] = '';\n\$outputstack_i++;\n";
- $code .= _transcompile($ast->params["key"]);
- $code .= "\$outputstack_i--;\n\$${loopname}_keyvar = array_pop(\$outputstack);\n";
- }
-
- if(!empty($ast->params["counter"]))
- {
- $code .= "\$outputstack[] = '';\n\$outputstack_i++;\n";
- $code .= _transcompile($ast->params["counter"]);
- $code .= "\$outputstack_i--;\n\$${loopname}_countervar = array_pop(\$outputstack);\n";
- }
-
- $code .= "\$${loopname}_array = \$ste->get_var_by_name(\$${loopname}_arrayvar);\n";
- $code .= "if(!is_array(\$${loopname}_array))\n\t\$${loopname}_array = array();\n";
- $code .= "\$${loopname}_counter = 0;\n";
-
- $loopbody = "\$${loopname}_counter++;\n\$ste->set_var_by_name(\$${loopname}_valuevar, \$${loopname}_value);\n";
- if(!empty($ast->params["key"]))
- $loopbody .= "\$ste->set_var_by_name(\$${loopname}_keyvar, \$${loopname}_key);\n";
- if(!empty($ast->params["counter"]))
- $loopbody .= "\$ste->set_var_by_name(\$${loopname}_countervar, \$${loopname}_counter);\n";
- $loopbody .= "\n";
- $loopbody .= _transcompile($ast->sub);
- $loopbody = "{\n" . loopbody(indent_code($loopbody)) . "\n}\n";
-
- $code .= "foreach(\$${loopname}_array as \$${loopname}_key => \$${loopname}_value)\n$loopbody\n";
-
- return $code;
- },
- "infloop" => function($ast)
- {
- return "while(True)\n{\n" . loopbody(indent_code(_transcompile($ast->sub)) . "\n}") . "\n";
- },
- "break" => function($ast)
- {
- return "\$ste->break_loop();\n";
- },
- "continue" => function($ast)
- {
- return "\$ste->continue_loop();\n";
- },
- "block" => function($ast)
- {
- if(empty($ast->name))
- throw new \Exception("Transcompile Error: name missing in <ste:block>. Stop.");
-
- $blknamevar = "blockname_" . str_replace(".", "_", uniqid("", True));
-
- $code = "\$outputstack[] = '';\n\$outputstack_i++;\n";
- $code .= _transcompile($ast->params["name"]);
- $code .= "\$outputstack_i--;\n\$${blknamevar} = array_pop(\$outputstack);\n";
-
- $tmpblk = uniqid("", True);
- $code .= "\$ste->blocks['$tmpblk'] = array_pop(\$outputstack);\n\$ste->blockorder[] = '$tmpblk';\n\$outputstack = array('');\n\$outputstack_i = 0;\n";
-
- $code .= _transcompile($ast->sub);
-
- $code .= "\$ste->blocks[\$${blknamevar}] = array_pop(\$outputstack);\n";
- $code .= "if(array_search(\$${blknamevar}, \$ste->blockorder) === FALSE)\n\t\$ste->blockorder[] = \$${blknamevar};\n\$outputstack = array('');\n\$outputstack_i = 0;\n";
-
- return $code;
- },
- "load" => function($ast)
- {
- if(empty($ast->params["name"]))
- throw new \Exception("Transcompile Error: name missing in <ste:load>. Stop.");
-
- $code = "\$outputstack[] = '';\n\$outputstack_i++;\n";
- $code .= _transcompile($ast->params["name"]);
- $code .= "\$outputstack_i--;\n\$outputstack[\$outputstack_i] .= \$ste->load(array_pop(\$outputstack));\n";
-
- return $code;
- },
- "mktag" => function($ast)
- {
- if(empty($ast->params["name"]))
- throw new \Exception("Transcompile Error: name missing in <ste:mktag>. Stop.");
-
- $code = "\$outputstack[] = '';\n\$outputstack_i++;\n";
- $code .= _transcompile($ast->params["name"]);
- $code .= "\$outputstack_i--;\n\$tagname = array_pop(\$outputstack);\n";
-
- $fxbody = "\$outputstack = array(); \$outputstack_i = 0;\$ste->vars['_tag_parameters'] = \$params;\n";
-
- if(!empty($ast->params["mandatory"]))
- {
- $code .= "\$outputstack[] = '';\n\$outputstack_i++;\n";
- $code .= _transcompile($ast->params["mandatory"]);
- $code .= "\$outputstack_i--;\n\$mandatory_params = explode('|', array_pop(\$outputstack));\n";
-
- $fxbody .= "foreach(\$mandatory_params as \$mp)\n{\n\tif(!isset(\$params[\$mp]))\n\t\tthrow new \Exception(\"Runtime Error: \$mp missing in <ste:\$tagname>. Stop.\");\n}";
- }
-
- $fxbody .= _transcompile($ast->sub);
- $fxbody .= "return array_pop(\$outputstack);";
-
- $code .= "\$tag_fx = function(\$ste, \$params, \$sub) use (\$tagname, \$mandatory_params)\n{\n" . indent_code($fxbody) . "\n};\n";
- $code .= "\$ste->register_tag(\$tagname, \$tag_fx);\n";
-
- return $code;
- },
- "tagcontent" => function($ast)
- {
- return "\$outputstack[\$outputstack_i] .= \$sub(\$ste);";
- },
- "set" => function($ast)
- {
- if(empty($ast->params["var"]))
- throw new \Exception("Transcompile Error: var missing in <ste:set>. Stop.");
-
- $code = "\$outputstack[] = '';\n\$outputstack_i++;\n";
- $code .= _transcompile($ast->params["var"]);
-
- $code .= "\$outputstack[] = '';\n\$outputstack_i++;\n";
- $code .= _transcompile($ast->sub);
-
- $code .= "\$outputstack_i -= 2;\n\$newvartext = array_pop(\$outputstack);\n\$varname = array_pop(\$outputstack);\n";
- $code .= "\$ste->set_var_by_name(\$varname, \$newvartext);\n";
-
- return $code;
- },
- "calc" => function($ast)
- {
- $code = "\$outputstack[] = '';\n\$outputstack_i++;\n";
- $code .= _transcompile($ast->sub);
- $code .= "\$outputstack_i--;\n\$outputstack[\$outputstack_i] .= \$ste->calc(array_pop(\$outputstack));\n";
-
- return $code;
- }
-);
-
-function escape_text($text)
-{
- return addcslashes($text, "\r\n\t\$\0..\x1f\\'\x7f..\xff");
-}
-
-function _transcompile($ast) /* The real transcompile function, does not add boilerplate code. */
-{
- $code = "";
- global $ste_builtins;
-
- foreach($ast as $node)
- {
- if($node instanceof TextNode)
- $code .= "\$outputstack[\$outputstack_i] .= \"" . escape_text($node->text) . "\";\n";
- else if($node instanceof VariableNode)
- $code .= "\$outputstack[\$outputstack_i] .= " . $node->transcompile() . ";\n";
- else if($node instanceof TagNode)
- {
- if(isset($ste_builtins[$node->name]))
- $code .= $ste_builtins[$node->name]($node);
- else
- {
- $paramarray = "parameters_" . str_replace(".", "_", uniqid("", True));
- $code .= "\$$paramarray = array();\n";
-
- foreach($node->params as $pname => $pcontent)
- {
- $code .= "\$outputstack[] = '';\n\$outputstack_i++;\n";
- $code .= _transcompile($pcontent);
- $code .= "\$outputstack_i--;\n\$${paramarray}['" . escape_text($pname) . "'] = array_pop(\$outputstack);\n";
- }
-
- $code .= "\$outputstack[\$outputstack_i] .= \$ste->call_tag('" . escape_text($node->name) . "', \$${paramarray}, " . transcompile($node->sub) . ");\n";
- }
- }
- }
-
- return $code;
-}
-
-$ste_transc_boilerplate = "\$outputstack = array('');\n\$outputstack_i = 0;\n";
-
-function transcompile($ast) /* Transcompile and add some boilerplate code. */
-{
- global $ste_transc_boilerplate;
- return "function(\$ste)\n{\n" . indent_code($ste_transc_boilerplate . _transcompile($ast) . "return array_pop(\$outputstack);") . "\n}";
-}
-
-class BreakException extends \Exception { }
-class ContinueException extends \Exception { }
-
-class STECore
-{
- private $tags;
- private $storage_access;
- private $cur_tpl_dir;
- public $blocks;
- public $blockorder;
- public $vars;
-
- public function __construct($storage_access)
- {
- $this->storage_access = $storage_access;
- $this->cur_tpl_dir = "/";
- STEStandardLibrary::_register_lib($this);
- $this->vars = array();
- $this->blockorder = array();
- $this->blocks = array();
- }
-
- public function register_tag($name, $callback)
- {
- if(!is_callable($callback))
- throw new \Exception("Can not register tag \"$name\", not callable.");
- if(empty($name))
- throw new \Exception("Can not register tag, empty name.");
- $this->tags[$name] = $callback;
- }
-
- public function call_tag($name, $params, $sub)
- {
- if(!isset($this->tags[$name]))
- throw new \Exception("Can not call tag \"$name\": Does not exist.");
- return call_user_func($this->tags[$name], $this, $params, $sub);
- }
-
- public function break_loop()
- {
- throw new BreakException();
- }
-
- public function continue_loop()
- {
- throw new ContinueException();
- }
-
- public function calc($expression)
- {
- return calc_rpn(shunting_yard($expression));
- }
-
- public function exectemplate($tpl)
- {
- $output = "";
- $lastblock = $this->load($tpl);
-
- foreach($this->blockorder as $blockname)
- $output .= $this->blocks[$blockname];
-
- return $output . $lastblock;
- }
-
- private function &get_var_reference(&$from, $name, $create_if_not_exist)
- {
- $bracket_open = strpos($name, "[");
- if($bracket_open === False)
- {
- if(isset($from[$name]) or $create_if_not_exist)
- {
- $ref = &$from[$name];
- return $ref;
- }
- else
- return NULL;
- }
- else
- {
- $old_varname = $varname;
- $bracket_close = strpos($name, "]", $bracket_open);
- if($bracket_close === FALSE)
- throw new Excpeption("Runtime Error: Invalid varname \"$varname\". Missing closing \"]\".");
- $varname = substr($name, 0, $bracket_open);
- $name = substr($name, $bracket_open + 1, $bracket_close - $bracket_open - 1) . substr($name, $bracket_close + 1);
- if(!is_array($from[$varname]))
- {
- if($create_if_not_exist)
- $from[$varname] = array();
- else
- return NULL;
- }
- try
- {
- $ref = &$self->get_var_reference($from[$varname], $name, $create_if_not_exist);
- return $ref;
- }
- catch(Exception $e)
- {
- throw new Excpeption("Runtime Error: Invalid varname \"$old_varname\". Missing closing \"]\".");
- }
- }
- }
-
- public function set_var_by_name($name, $val)
- {
- $ref = &$this->get_var_reference($this->vars, $name, True);
- $ref = $val;
- }
-
- public function get_var_by_name($name)
- {
- $ref = $this->get_var_reference($this->vars, $name, False);
- return $ref === NULL ? "" : $ref;
- }
-
- public function load($tpl, $quiet=False)
- {
- $tpldir_b4 = $this->cur_tpl_dir;
-
- /* Resolve ".", ".." and protect from possible LFI */
- $tpl = str_replace("\\", "/", $tpl);
- if($tpl[0] != "/")
- $tpl = $this->cur_tpl_dir . "/" . $tpl;
- $pathex = array_filter(array_slice(explode("/", $tpl), 1), function($s) { return ($s != ".") and (!empty($s)); });
- $pathex = array_merge($pathex);
- while(($i = array_search("..", $pathex)) !== False)
- {
- if($i == 0)
- $pathex = array_slice($pathex, 1);
- else
- $pathex = array_merge(array_slice($pathex, 0, $i), array_slice($pathex, $i + 2));
- }
- $tpl = implode("/", $pathex);
-
- if($quiet)
- {
- $blocks_back = clone $this->blocks;
- $blockorder_back = clone $this->blockorder;
- }
-
- $mode = MODE_TRANSCOMPILED;
- $content = $this->storage_access->load($tpl, $mode);
- if($mode == MODE_SOURCE)
- {
- $ast = parse($content);
- $transc = transcompile($ast);
- $this->storage_access->save($tpl, $transc, MODE_TRANSCOMPILED);
- eval("\$content = $transc;");
- }
-
- $output = $content($this);
-
- $this->cur_tpl_dir = $tpldir_b4;
-
- if($quiet)
- {
- $this->blocks = $blocks_back;
- $this->blockorder = $blockorder_back;
- }
- else
- return $output;
- }
-
- public function evalbool($txt)
- {
- return trim($txt) != "";
- }
-}
-
-class STEStandardLibrary
-{
- static public function _register_lib($ste)
- {
- foreach(get_class_methods(__CLASS__) as $method)
- if($method[0] != "_")
- $ste->register_tag($method, array(__CLASS__, $method));
- }
-
- static public function escape($ste, $params, $sub)
- {
- return htmlentities($sub($ste), ENT_QUOTES, "UTF-8");
- }
-
- static public function strlen($ste, $params, $sub)
- {
- return strlen($sub($ste));
- }
-
- static public function array_len($ste, $params, $sub)
- {
- if(empty($params["var"]))
- throw new \Exception("Runtime Error: missing var parameter in <ste:array_len>.");
- $a = $ste->get_var_by_name($params["var"]);
- return (is_array($a)) ? count($a) : "";
- }
-}
-
-?>