diff options
Diffstat (limited to 'src/ste/Transcompiler.php')
| -rw-r--r-- | src/ste/Transcompiler.php | 200 |
1 files changed, 113 insertions, 87 deletions
diff --git a/src/ste/Transcompiler.php b/src/ste/Transcompiler.php index 4aadcdf..d223b53 100644 --- a/src/ste/Transcompiler.php +++ b/src/ste/Transcompiler.php @@ -9,15 +9,18 @@ namespace kch42\ste; * Class: Transcompiler * Contains the STE transcompiler. You'll only need this, if you want to manually transcompile a STE template. */ -class Transcompiler { - private static $builtins = NULL; +class Transcompiler +{ + private static $builtins = null; - public static function tempvar($typ) { + public static function tempvar($typ) + { return $typ . '_' . str_replace('.', '_', uniqid('', true)); } - public static function init_builtins() { - if(self::$builtins !== NULL) { + public static function init_builtins() + { + if (self::$builtins !== null) { return; } @@ -42,23 +45,24 @@ class Transcompiler { ); } - private static function builtin_if($ast) { + private static function builtin_if($ast) + { $output = ""; $condition = array(); - $then = NULL; - $else = NULL; + $then = null; + $else = null; - foreach($ast->sub as $node) { - if(($node instanceof TagNode) and ($node->name == "then")) { + foreach ($ast->sub as $node) { + if (($node instanceof TagNode) and ($node->name == "then")) { $then = $node->sub; - } else if(($node instanceof TagNode) and ($node->name == "else")) { + } elseif (($node instanceof TagNode) and ($node->name == "else")) { $else = $node->sub; } else { $condition[] = $node; } } - if($then === NULL) { + if ($then === null) { throw new ParseCompileError("self::Transcompile error: Missing <ste:then> in <ste:if>.", $ast->tpl, $ast->offset); } @@ -67,14 +71,15 @@ class Transcompiler { $output .= "\$outputstack_i--;\nif(\$ste->evalbool(array_pop(\$outputstack)))\n{\n"; $output .= self::indent_code(self::_transcompile($then)); $output .= "\n}\n"; - if($else !== NULL) { + if ($else !== null) { $output .= "else\n{\n"; $output .= self::indent_code(self::_transcompile($else)); $output .= "\n}\n"; } return $output; } - private static function builtin_cmp($ast) { + private static function builtin_cmp($ast) + { $operators = array( array('eq', '=='), array('neq', '!='), @@ -86,42 +91,42 @@ class Transcompiler { $code = ""; - if(isset($ast->params["var_b"])) { + if (isset($ast->params["var_b"])) { list($val, $pre) = self::_transcompile($ast->params["var_b"], true); $code .= $pre; $b = '$ste->get_var_by_name(' . $val . ')'; - } else if(isset($ast->params["text_b"])) { + } elseif (isset($ast->params["text_b"])) { list($b, $pre) = self::_transcompile($ast->params["text_b"], true); $code .= $pre; } else { throw new ParseCompileError("self::Transcompile error: neiter var_b nor text_b set in <ste:cmp>.", $ast->tpl, $ast->offset); } - if(isset($ast->params["var_a"])) { + if (isset($ast->params["var_a"])) { list($val, $pre) = self::_transcompile($ast->params["var_a"], true); $code .= $pre; $a = '$ste->get_var_by_name(' . $val . ')'; - } else if(isset($ast->params["text_a"])) { + } elseif (isset($ast->params["text_a"])) { list($a, $pre) = self::_transcompile($ast->params["text_a"], true); $code .= $pre; } else { throw new ParseCompileError("self::Transcompile error: neiter var_a nor text_a set in <ste:cmp>.", $ast->tpl, $ast->offset); } - if(!isset($ast->params["op"])) { + if (!isset($ast->params["op"])) { throw new ParseCompileError("self::Transcompile error: op not given in <ste:cmp>.", $ast->tpl, $ast->offset); } - if((count($ast->params["op"]) == 1) and ($ast->params["op"][0] instanceof TextNode)) { + if ((count($ast->params["op"]) == 1) and ($ast->params["op"][0] instanceof TextNode)) { /* Operator is known at compile time, this saves *a lot* of output code! */ $op = trim($ast->params["op"][0]->text); - $op_php = NULL; - foreach($operators as $v) { - if($v[0] == $op) { + $op_php = null; + foreach ($operators as $v) { + if ($v[0] == $op) { $op_php = $v[1]; break; } } - if($op_php === NULL) { + if ($op_php === null) { throw new ParseCompileError("self::Transcompile Error: Unknown operator in <ste:cmp>", $ast->tpl, $ast->offset); } $code .= "\$outputstack[\$outputstack_i] .= (($a) $op_php ($b)) ? 'yes' : '';\n"; @@ -129,49 +134,52 @@ class Transcompiler { list($val, $pre) = self::_transcompile($ast->params["op"], true); $code .= $pre . "switch(trim(" . $val . "))\n{\n\t"; $code .= implode("", array_map( - function($op) use ($a,$b) - { + 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"; - }, $operators - )); + }, + $operators + )); $code .= "default: throw new \\kch42\\ste\\RuntimeError('Unknown operator in <ste:cmp>.');\n}\n"; } return $code; } - private static function builtin_not($ast) { + private static function builtin_not($ast) + { $code = "\$outputstack[] = '';\n\$outputstack_i++;\n"; $code .= self::_transcompile($ast->sub); $code .= "\$outputstack_i--;\n\$outputstack[\$outputstack_i] .= (!\$ste->evalbool(array_pop(\$outputstack))) ? 'yes' : '';\n"; return $code; } - private static function builtin_even($ast) { + private static function builtin_even($ast) + { $code = "\$outputstack[] = '';\n\$outputstack_i++;\n"; $code .= self::_transcompile($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 $code; } - private static function builtin_for($ast) { + private static function builtin_for($ast) + { $code = ""; $loopname = self::tempvar("forloop"); - if(empty($ast->params["start"])) { + if (empty($ast->params["start"])) { throw new ParseCompileError("self::Transcompile error: Missing 'start' parameter in <ste:for>.", $ast->tpl, $ast->offset); } list($val, $pre) = self::_transcompile($ast->params["start"], true); $code .= $pre; $code .= "\$${loopname}_start = " . $val . ";\n"; - if(empty($ast->params["stop"])) { + if (empty($ast->params["stop"])) { throw new ParseCompileError("self::Transcompile error: Missing 'end' parameter in <ste:for>.", $ast->tpl, $ast->offset); } list($val, $pre) = self::_transcompile($ast->params["stop"], true); $code .= $pre; $code .= "\$${loopname}_stop = " . $val . ";\n"; - $step = NULL; /* i.e. not known at compilation time */ - if(empty($ast->params["step"])) { + $step = null; /* i.e. not known at compilation time */ + if (empty($ast->params["step"])) { $step = 1; - } else if((count($ast->params["step"]) == 1) and ($ast->params["step"][0] instanceof TextNode)) { + } elseif ((count($ast->params["step"]) == 1) and ($ast->params["step"][0] instanceof TextNode)) { $step = $ast->params["step"][0]->text + 0; } else { list($val, $pre) = self::_transcompile($ast->params["step"], true); @@ -179,7 +187,7 @@ class Transcompiler { $code .= "\$${loopname}_step = " . $val . ";\n"; } - if(!empty($ast->params["counter"])) { + if (!empty($ast->params["counter"])) { list($val, $pre) = self::_transcompile($ast->params["counter"], true); $code .= $pre; $code .= "\$${loopname}_countername = " . $val . ";\n"; @@ -189,7 +197,7 @@ class Transcompiler { $loopbody .= self::_transcompile($ast->sub); $loopbody = self::indent_code("{\n" . self::loopbody(self::indent_code($loopbody)) . "\n}\n"); - if($step === NULL) { + if ($step === null) { $code .= "if(\$${loopname}_step == 0)\n\tthrow new \\kch42\\ste\\RuntimeError('step can not be 0 in <ste:for>.');\n"; $code .= "if(\$${loopname}_step > 0)\n{\n"; $code .= "\tfor(\$${loopname}_counter = \$${loopname}_start; \$${loopname}_counter <= \$${loopname}_stop; \$${loopname}_counter += \$${loopname}_step)\n"; @@ -198,9 +206,9 @@ class Transcompiler { $code .= "\tfor(\$${loopname}_counter = \$${loopname}_start; \$${loopname}_counter >= \$${loopname}_stop; \$${loopname}_counter += \$${loopname}_step)\n"; $code .= $loopbody; $code .= "\n}\n"; - } else if($step == 0) { + } elseif ($step == 0) { throw new ParseCompileError("self::Transcompile Error: step can not be 0 in <ste:for>.", $ast->tpl, $ast->offset); - } else if($step > 0) { + } elseif ($step > 0) { $code .= "for(\$${loopname}_counter = \$${loopname}_start; \$${loopname}_counter <= \$${loopname}_stop; \$${loopname}_counter += $step)\n$loopbody\n"; } else { $code .= "for(\$${loopname}_counter = \$${loopname}_start; \$${loopname}_counter >= \$${loopname}_stop; \$${loopname}_counter += $step)\n$loopbody\n"; @@ -208,31 +216,32 @@ class Transcompiler { return $code; } - private static function builtin_foreach($ast) { + private static function builtin_foreach($ast) + { $loopname = self::tempvar("foreachloop"); $code = ""; - if(empty($ast->params["array"])) { + if (empty($ast->params["array"])) { throw new ParseCompileError("self::Transcompile Error: array not given in <ste:foreach>.", $ast->tpl, $ast->offset); } list($val, $pre) = self::_transcompile($ast->params["array"], true); $code .= $pre; $code .= "\$${loopname}_arrayvar = " . $val . ";\n"; - if(empty($ast->params["value"])) { + if (empty($ast->params["value"])) { throw new ParseCompileError("self::Transcompile Error: value not given in <ste:foreach>.", $ast->tpl, $ast->offset); } list($val, $pre) = self::_transcompile($ast->params["value"], true); $code .= $pre; $code .= "\$${loopname}_valuevar = " . $val . ";\n"; - if(!empty($ast->params["key"])) { + if (!empty($ast->params["key"])) { list($val, $pre) = self::_transcompile($ast->params["key"], true); $code .= $pre; $code .= "\$${loopname}_keyvar = " . $val . ";\n"; } - if(!empty($ast->params["counter"])) { + if (!empty($ast->params["counter"])) { list($val, $pre) = self::_transcompile($ast->params["counter"], true); $code .= $pre; $code .= "\$${loopname}_countervar = " . $val . ";\n"; @@ -241,15 +250,15 @@ class Transcompiler { $loopbody = ""; $code .= "\$${loopname}_array = \$ste->get_var_by_name(\$${loopname}_arrayvar);\n"; $code .= "if(!is_array(\$${loopname}_array))\n\t\$${loopname}_array = array();\n"; - if(!empty($ast->params["counter"])) { + if (!empty($ast->params["counter"])) { $code .= "\$${loopname}_counter = -1;\n"; $loopbody .= "\$${loopname}_counter++;\n\$ste->set_var_by_name(\$${loopname}_countervar, \$${loopname}_counter);\n"; } $loop = array(); $else = array(); - foreach($ast->sub as $node) { - if(($node instanceof TagNode) && ($node->name == "else")) { + foreach ($ast->sub as $node) { + if (($node instanceof TagNode) && ($node->name == "else")) { $else = array_merge($else, $node->sub); } else { $loop[] = $node; @@ -257,14 +266,14 @@ class Transcompiler { } $loopbody .= "\$ste->set_var_by_name(\$${loopname}_valuevar, \$${loopname}_value);\n"; - if(!empty($ast->params["key"])) { + if (!empty($ast->params["key"])) { $loopbody .= "\$ste->set_var_by_name(\$${loopname}_keyvar, \$${loopname}_key);\n"; } $loopbody .= "\n"; $loopbody .= self::_transcompile($loop); $loopbody = "{\n" . self::loopbody(self::indent_code($loopbody)) . "\n}\n"; - if(!empty($else)) { + if (!empty($else)) { $code .= "if(empty(\$${loopname}_array))\n{\n"; $code .= self::indent_code(self::_transcompile($else)); $code .= "\n}\nelse "; @@ -273,17 +282,21 @@ class Transcompiler { return $code; } - private static function builtin_infloop($ast) { + private static function builtin_infloop($ast) + { return "while(true)\n{\n" . self::indent_code(self::loopbody(self::indent_code(self::_transcompile($ast->sub)))) . "\n}\n"; } - private static function builtin_break($ast) { + private static function builtin_break($ast) + { return "throw new \\kch42\\ste\\BreakException();\n"; } - private static function builtin_continue($ast) { + private static function builtin_continue($ast) + { return "throw new \\kch42\\ste\\ContinueException();\n"; } - private static function builtin_block($ast) { - if(empty($ast->params["name"])) { + private static function builtin_block($ast) + { + if (empty($ast->params["name"])) { throw new ParseCompileError("self::Transcompile Error: name missing in <ste:block>.", $ast->tpl, $ast->offset); } @@ -302,8 +315,9 @@ class Transcompiler { return $code; } - private static function builtin_load($ast) { - if(empty($ast->params["name"])) { + private static function builtin_load($ast) + { + if (empty($ast->params["name"])) { throw new ParseCompileError("self::Transcompile Error: name missing in <ste:load>.", $ast->tpl, $ast->offset); } @@ -311,10 +325,11 @@ class Transcompiler { $code .= "\$outputstack[\$outputstack_i] .= \$ste->load(" . $val . ");\n"; return $code; } - private static function builtin_mktag($ast) { + private static function builtin_mktag($ast) + { $code = ""; - if(empty($ast->params["name"])) { + if (empty($ast->params["name"])) { throw new ParseCompileError("self::Transcompile Error: name missing in <ste:mktag>.", $ast->tpl, $ast->offset); } @@ -323,7 +338,7 @@ class Transcompiler { list($tagname, $tagname_pre) = self::_transcompile($ast->params["name"], true); $usemandatory = ""; - if(!empty($ast->params["mandatory"])) { + if (!empty($ast->params["mandatory"])) { $usemandatory = " use (\$mandatory_params)"; $code .= "\$outputstack[] = '';\n\$outputstack_i++;\n"; $code .= self::_transcompile($ast->params["mandatory"]); @@ -341,11 +356,13 @@ class Transcompiler { return $code; } - private static function builtin_tagcontent($ast) { + private static function builtin_tagcontent($ast) + { return "\$outputstack[\$outputstack_i] .= \$sub(\$ste);"; } - private static function builtin_set($ast) { - if(empty($ast->params["var"])) { + private static function builtin_set($ast) + { + if (empty($ast->params["var"])) { throw new ParseCompileError("self::Transcompile Error: var missing in <ste:set>.", $ast->tpl, $ast->offset); } @@ -359,8 +376,9 @@ class Transcompiler { return $code; } - private static function builtin_setlocal($ast) { - if(empty($ast->params["var"])) { + private static function builtin_setlocal($ast) + { + if (empty($ast->params["var"])) { throw new ParseCompileError("self::Transcompile Error: var missing in <ste:set>.", $ast->tpl, $ast->offset); } @@ -374,15 +392,17 @@ class Transcompiler { return $code; } - private static function builtin_get($ast) { - if(empty($ast->params["var"])) { + private static function builtin_get($ast) + { + if (empty($ast->params["var"])) { throw new ParseCompileError("self::Transcompile Error: var missing in <ste:get>.", $ast->tpl, $ast->offset); } - list($val, $pre) = self::_transcompile($ast->params["var"], true); + list($val, $pre) = self::_transcompile($ast->params["var"], true); return "$pre\$outputstack[\$outputstack_i] .= \$ste->get_var_by_name(" . $val . ");"; } - private static function builtin_calc($ast) { + private static function builtin_calc($ast) + { $code = "\$outputstack[] = '';\n\$outputstack_i++;\n"; $code .= self::_transcompile($ast->sub); $code .= "\$outputstack_i--;\n\$outputstack[\$outputstack_i] .= \$ste->calc(array_pop(\$outputstack));\n"; @@ -390,39 +410,44 @@ class Transcompiler { return $code; } - private static function indent_code($code) { + private static function indent_code($code) + { return implode( "\n", - array_map(function($line) { return "\t$line"; }, explode("\n", $code)) + array_map(function ($line) { + return "\t$line"; + }, explode("\n", $code)) ); } - private static function loopbody($code) { + private static function loopbody($code) + { return "try\n{\n" . self::indent_code($code) . "\n}\ncatch(\\kch42\\ste\\BreakException \$e) { break; }\ncatch(\\kch42\\ste\\ContinueException \$e) { continue; }\n"; } - private static function _transcompile($ast, $avoid_outputstack = false) { /* The real self::transcompile function, does not add boilerplate code. */ + private static function _transcompile($ast, $avoid_outputstack = false) + { /* The real self::transcompile function, does not add boilerplate code. */ $code = ""; $text_and_var_buffer = array(); - foreach($ast as $node) { - if($node instanceof TextNode) { + foreach ($ast as $node) { + if ($node instanceof TextNode) { $text_and_var_buffer[] = '"' . Misc::escape_text($node->text) . '"'; - } else if($node instanceof VariableNode) { + } elseif ($node instanceof VariableNode) { $text_and_var_buffer[] = $node->transcompile(); - } else if($node instanceof TagNode) { - if(!empty($text_and_var_buffer)) { - $code .= "\$outputstack[\$outputstack_i] .= " . implode (" . ", $text_and_var_buffer) . ";\n"; + } elseif ($node instanceof TagNode) { + if (!empty($text_and_var_buffer)) { + $code .= "\$outputstack[\$outputstack_i] .= " . implode(" . ", $text_and_var_buffer) . ";\n"; $text_and_var_buffer = array(); } - if(isset(self::$builtins[$node->name])) { + if (isset(self::$builtins[$node->name])) { $code .= call_user_func(self::$builtins[$node->name], $node); } else { $paramarray = self::tempvar("parameters"); $code .= "\$$paramarray = array();\n"; - foreach($node->params as $pname => $pcontent) { + foreach ($node->params as $pname => $pcontent) { list($pval, $pre) = self::_transcompile($pcontent, true); $code .= $pre . "\$${paramarray}['" . Misc::escape_text($pname) . "'] = " . $pval . ";\n"; } @@ -434,15 +459,15 @@ class Transcompiler { } } - if($avoid_outputstack && ($code == "")) { - return array(implode (" . ", $text_and_var_buffer), ""); + if ($avoid_outputstack && ($code == "")) { + return array(implode(" . ", $text_and_var_buffer), ""); } - if(!empty($text_and_var_buffer)) { - $code .= "\$outputstack[\$outputstack_i] .= ". implode (" . ", $text_and_var_buffer) . ";\n"; + if (!empty($text_and_var_buffer)) { + $code .= "\$outputstack[\$outputstack_i] .= ". implode(" . ", $text_and_var_buffer) . ";\n"; } - if($avoid_outputstack) { + if ($avoid_outputstack) { $tmpvar = self::tempvar("tmp"); $code = "\$outputstack[] = '';\n\$outputstack_i++;" . $code; $code .= "\$$tmpvar = array_pop(\$outputstack);\n\$outputstack_i--;\n"; @@ -463,7 +488,8 @@ class Transcompiler { * Returns: * PHP code. The PHP code is an anonymous function expecting a <STECore> instance as its parameter and returns a string (everything that was not pached into a section). */ - public static function transcompile($ast) { /* self::Transcompile and add some boilerplate code. */ + public static function transcompile($ast) + { /* self::Transcompile and add some boilerplate code. */ $boilerplate = "\$outputstack = array('');\n\$outputstack_i = 0;\n"; return "function(\$ste)\n{\n" . self::indent_code($boilerplate . self::_transcompile($ast) . "return array_pop(\$outputstack);") . "\n}"; } |