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File: class.logo.parser.php

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File: class.logo.parser.php
Role: Class source
Content type: text/plain
Description: Logo Interpreter Class
Class: Logo Interpreter
Logo language interpreter
Author: By
Last change: v0.2 released
Date: 10 years ago
Size: 67,923 bytes
 

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<?php // License: GNU General Public License (GPL) // class.logo.parser.php // @ver 0.1 // Author: Dr Zhihua Lai // Example URL: http://www.zhihua-lai.com/?do=Software.Logo error_reporting(E_ALL); // Define Directory define('LOGO_DIR', dirname(__FILE__).'/'); // Include include(LOGO_DIR.'logo.php'); require_once(LOGO_DIR.'util.php'); require_once(LOGO_DIR.'class.storage.php'); // Constants define('LOGO_OK_PROC_RETURN',-1); define('LOGO_OK',0); define('LOGO_ERROR_UNFINISHED_COMMENTS',1); define('LOGO_ERROR_MISSING_COMMAND',2); define('LOGO_WARNING_NOT_FULLY_IMPLEMENTED',3); define('LOGO_WARNING_NUMBER_ROUNDED',4); define('LOGO_ERROR_MISSING_ARG',5); define('LOGO_ERROR_BAD_COMMAND',6); define('LOGO_WARNING_UNSUPPORTED_BG_CHANGE',7); define('LOGO_ERROR_NO_REPEAT_TIME',8); define('LOGO_ERROR_UNSUPPORTED_GROUP_ACTION',9); define('LOGO_ERROR_TOO_MANY_LEFT',10); define('LOGO_ERROR_TOO_MANY_RIGHT',11); define('LOGO_INFORMATION_TOO_MANY_WARNING',12); define('LOGO_ERROR_TIME_OUT',13); define('LOGO_WARNING_MISSING_REPEAT_BODY',14); define('LOGO_ERROR_STOP_NOT_IN_PROC',15); define('LOGO_ERROR_END_NOT_FOUND',16); define('LOGO_ERROR_KEYWORD_IN_USE',17); define('LOGO_ERROR_NESTED_PROCEDURE_NOT_ALLOWED',18); define('LOGO_ERROR_INVALID_PROC_NAME',19); define('LOGO_ERROR_PROC_DEFINED',20); define('LOGO_ERROR_NO_TO',21); define('LOGO_ERROR_INVALID_SYMBOL',22); define('LOGO_ERROR_TOO_MANY_PROC',23); define('LOGO_WARNING_TURTLE_OUT',24); define('LOGO_ERROR_REPEAT_PROC_ARG',25); define('LOGO_ERROR_TOO_MANY_LEVELS',26); define('LOGO_WARNING_LOCAL_MAKE_GLOBALUSE',27); define('LOGO_ERROR_MAKE_NEED_QUOTE',28); define('LOGO_ERROR_MAKE_INVALID_NAME',29); define('LOGO_ERROR_MAKE_INVALID_VALUE',30); define('LOGO_ERROR_UNKNOWN_GROUP',31); define('LOGO_ERROR_MISSING_BOOLEAN',32); define('LOGO_WARNING_UNSUPPORTED_COLOR',33); class LogoParser { var $_logo; var $_s; var $_vars; var $_makevars; var $_localmake=array(); var $_coms=array(); var $_args=array(); var $_lineX; var $_lineY; var $_warnings=array(); var $_lineW; var $_maxW; var $_repeat=array(); var $_repeatT=array(); var $_maxT; var $_runningT; var $_maxProcLevel; var $_endT; var $_maxProc; var $_inProc; var $_rlvl; var $_to_names=array(); var $_to_start=array(); var $_to_end=array(); var $_to_args=array(); var $_to_counting_args; var $_var_stack=array(); var $_src_line; var $_istruecolor; var $_runningProc=array(); var $Logo_Color_R=array(0,0,0,0,255,255,165,211,153,173,127,224,250,221,255,255); var $Logo_Color_G=array(0,0,255,255,0,0,42,211,153,216,255,255,128,221,255,255); var $Logo_Color_B=array(0,255,0,255,0,255,42,211,153,230,212,255,114,221,0,255); var $_keywords_args=array( 'FORWARD','FD', 'WALK', 'JUMP', 'TURN', 'JMP', 'BACK','BK', 'RIGHT','RT', 'LEFT','LT', 'SETPC','SETPENCOLOR','SETPENCOLOUR', 'SETSCREENCOLOR','SETSC','SETSCREENCOLOUR', 'REPEAT', 'SETXY','SETPOS','DOTXY', 'SETX', 'SETY', 'SLEEP', 'WAIT', 'IMGW', 'IMGH', 'PRINT', 'TO', 'ARC','ARC2', 'MAKE', 'LOCALMAKE', 'LOCAL', 'IF', //'IFELSE', 'SETFC','SETFLOODCOLOR','SETFLOODCOLOUR' ); var $_keywords=array( 'HT','HIDETURTLE', 'ST','SHOWTURTLE', 'PU','PENUP', 'PE','PENERASER', 'PD','PENDOWN','PENNORMAL', 'CS','CLEANSCREEN', 'HOME', 'FENCE', 'WINDOW', 'WRAP', 'FILL', 'END', 'STOP', 'DOT' ); /* Constructor */ function LogoParser(&$lgo, $s='') { $this->_logo=&$lgo; $this->_lineX=0; $this->_lineY=0; $this->_lineW=''; $this->_maxW=25; $this->_maxT=3; $this->_maxProcLevel=999; $this->_maxProc=999; $this->_inProc=false; $this->_rlvl=0; $this->_to_counting_args=false; $this->_makevars=new Storage(); $this->_vars=new Storage(); $this->_vars->_setVar('REPCOUNT',0); $this->_vars->_setVar('SCREENCOLOUR',($lgo->getSC())); $this->_vars->_setVar('FLOODCOLOUR',($lgo->getFC())); $this->_vars->_setVar('PENCOLOUR',($lgo->getPC())); $this->_vars->_setVar('SCREENCOLOR',($lgo->getSC())); $this->_vars->_setVar('FLOODCOLOR',($lgo->getFC())); $this->_vars->_setVar('PENCOLOR',($lgo->getPC())); $this->_vars->_setVar('PI',pi()); $this->_vars->_setVar('WIDTH', $lgo->getImageX()); $this->_vars->_setVar('HEIGHT', $lgo->getImageY()); $this->_vars->_setVar('MAXX', $lgo->getImageHX()); $this->_vars->_setVar('MAXY', $lgo->getImageHY()); $this->_vars->_setVar('MINX', -$lgo->getImageHX()); $this->_vars->_setVar('MINY', -$lgo->getImageHY()); $this->_istruecolor=$lgo->isTrueColor()?1:0; $this->_vars->_setVar('ISTRUECOLOR', $this->_istruecolor); $this->_vars->_setVar('ISTRUECOLOUR', $this->_istruecolor); $this->_vars->_setVar('BLACK',0); $this->_vars->_setVar('BLUE',1); $this->_vars->_setVar('GREEN',2); $this->_vars->_setVar('CYAN',3); $this->_vars->_setVar('RED',4); $this->_vars->_setVar('MAGENTA',5); $this->_vars->_setVar('BROWN',6); $this->_vars->_setVar('LIGHTGRAY',7); $this->_vars->_setVar('DARKGRAY',8); $this->_vars->_setVar('LIGHTGREY',7); $this->_vars->_setVar('DARKGREY',8); $this->_vars->_setVar('LIGHTBLUE',9); $this->_vars->_setVar('LIGHTGREEN',10); $this->_vars->_setVar('LIGHTCYAN',11); $this->_vars->_setVar('LIGHTRED',12); $this->_vars->_setVar('LIGHTMAGENTA',13); $this->_vars->_setVar('YELLOW',14); $this->_vars->_setVar('WHITE',15); $this->_vars->_setVar('POSX',0); $this->_vars->_setVar('POSY',0); $this->_vars->_setVar('DEGREE',0); } function setMaxTimeout($d) { $d=(integer)$d; if ($d<1) $d=1; if ($d>5) $d=5; $this->_maxT=$d; } function getMaxTimeout() { return ($this->_maxT); } function getMsg($code, $x=0, $y=0, $w='') { $code=(integer)$code; $m=''; switch ($code) { case LOGO_OK: case LOGO_OK_PROC_RETURN: $m='OK - EXECUTED'; break; case LOGO_ERROR_UNFINISHED_COMMENTS: $m='ERROR - UNFINISHED COMMENTS'; break; case LOGO_ERROR_MISSING_COMMAND: $m='ERROR - MISSING COMMAND'; break; case LOGO_WARNING_NUMBER_ROUNDED: $m='WARNING - FLOAT ROUNDED AS INTEGER'; break; case LOGO_ERROR_MISSING_ARG: $m='ERROR - MISSING ARGUMENTS'; break; case LOGO_ERROR_BAD_COMMAND: $m='ERROR - UNKNOWN COMMAND OR PROCEDURE'; break; case LOGO_WARNING_UNSUPPORTED_BG_CHANGE: $m='WARNING - UNABLE TO CHANGE SCREEN COLOR IN PROCESS'; break; case LOGO_ERROR_TOO_MANY_LEFT: $m='ERROR - MISSING ]'; break; case LOGO_ERROR_TOO_MANY_RIGHT: $m='ERROR - MISSING ['; break; case LOGO_INFORMATION_TOO_MANY_WARNING: $m='MSG - TOO MANY WARNINGS, THE REST IGNORED'; break; case LOGO_ERROR_TIME_OUT: $m='ERROR - TIME OUT'; break; case LOGO_WARNING_MISSING_REPEAT_BODY: $m='WARNING - MISSING A GROUP STATMENT'; break; case LOGO_WARNING_NOT_FULLY_IMPLEMENTED: $m='WARNING - NOT FULLY IMPLEMENTED'; break; case LOGO_ERROR_STOP_NOT_IN_PROC: $m='ERROR - CAN ONLY USE STOP IN PROCEDURE'; break; case LOGO_ERROR_END_NOT_FOUND: $m='ERROR - NEED A END TO FINISH DEFINITION OF TO';break; case LOGO_ERROR_KEYWORD_IN_USE: $m='ERROR - PROCEDURE NAME IS A RESERVED KEYWORD'; break; case LOGO_ERROR_NESTED_PROCEDURE_NOT_ALLOWED: $m='ERROR - NESTED PROCEDURE NOT ALLOWED'; break; case LOGO_ERROR_INVALID_PROC_NAME: $m='ERROR - INVALID PROCEDURE NAME'; break; case LOGO_ERROR_PROC_DEFINED: $m='ERROR - PROCEDURE CAN NOT BE RE-DEFINED'; break; case LOGO_ERROR_NO_TO: $m='ERROR - CANNOT FIND TO TO START DEFINING PROCEDURE'; break; case LOGO_ERROR_INVALID_SYMBOL: $m='ERROR - NOT A VALID PROCEDURE NAME'; break; case LOGO_ERROR_TOO_MANY_PROC: $m='ERROR - EXCEED MAXIMUM '.$this->_maxProc.' DEFINED PROCEDURES '; break; case LOGO_WARNING_TURTLE_OUT: $m='WARNING - TURTLE IS OUT OF BOUND'; break; case LOGO_ERROR_REPEAT_PROC_ARG: $m='ERROR - DUPLICATION OF PROCEDURE ARGUMENTS'; break; case LOGO_ERROR_TOO_MANY_LEVELS: $m='ERROR - TOO MANY LEVELS OF PROCEDURE'; break; case LOGO_WARNING_LOCAL_MAKE_GLOBALUSE: $m='WARNING - LOCALMAKE GLOBALLY USE (NOT DELETED)'; break; case LOGO_ERROR_MAKE_NEED_QUOTE: $m='ERROR - MAKE VARIABLE NEEDS DOUBLE QUOTA'; break; case LOGO_ERROR_MAKE_INVALID_NAME: $m='ERROR - MAKE VARIABLE IS NOT A VALID KEYWORD'; break; case LOGO_ERROR_MAKE_INVALID_VALUE: $m='ERROR - MAKE DOES NOT HAVE A VALID VALUE'; break; case LOGO_ERROR_UNKNOWN_GROUP: $m='ERROR - UNKNOWN ACTION TO START A GROUP ['; break; case LOGO_ERROR_NO_REPEAT_TIME: $m='ERROR - NO ENOUGH INPUT TO REPEAT'; break; case LOGO_ERROR_UNSUPPORTED_GROUP_ACTION: $m='ERROR - UNSUPPORTED GROUP ACTION'; break; case LOGO_ERROR_MISSING_BOOLEAN: $m='ERROR - IF STATEMENT MISSING BOOLEAN EXPRESSION'; break; case LOGO_WARNING_UNSUPPORTED_COLOR: $m='WARNING - UNSUPPORTED COLOR'; break; default: $m='ERROR - UNKNOWN REASONS FAILED THE PROCESS';break; } $s=''; $extra=''; if (strlen($w)>8) $w=substr($w,0,8).'[..]'; if ($x&&$y) { if ($w) { $extra=' - ('.$w.')'; } $s=$m."$extra AT ROW ".$y.' COL '.$x; } else { if ($this->_lineW) { $extra=' - ( '.$this->_lineW.' )'; } $s=$m."$extra AT ROW ".$this->_lineY.' COL '.$this->_lineX; } if (($this->_src_line)&&($code!=LOGO_OK)) { $extra=' (__LINE__:'.$this->_src_line.')'; } return ($s.$extra); } function getMemAndTime() { return ('[IN '.$this->_endT.' SECONDS, '.(memory_get_usage()).' BYTES ALLOCATED]'); } public static function isSymbol($s) { $__tmp = strlen($s); if ($__tmp==0) return (false); $ch=$s[0]; if (isDigit($ch)) return (false); for ($i=0;$i<$__tmp;$i++) { $ch=$s[$i]; if (!((isChar($ch))||(isDigit($ch))||($ch=='_'))) { return (false); } } return (true); } function isGood($s) { return ( (LogoParser::isSymbol($s)) && (!in_array($s, $this->_keywords)) &&(!in_array($s, $this->_keywords_args)) &&(!in_array($s, $this->_to_names)) ); } public static function str2num($str, &$changes) { $t=strlen($str); $changes=true; $str = preg_replace('`([^+\-*=/\(\)0-9<>&|\.%]*)`','',$str); if (strlen($str)==0) { $str = '0'; } else { if ($t==strlen($str)) { eval("\$str = $str;"); $changes=false; } else { $str = '0'; } } return ($str); } function isNumber($s, &$realnum, &$value) { if (strpos($s, '==')===false) { $s=str_replace('=','==',$s); } foreach ($this->_makevars->keys() as $keys) { $s=str_replace(':'.$keys, $this->_makevars->getVar($keys), $s); } foreach ($this->_vars->keys() as $keys) { $s=str_replace(':'.$keys, $this->_vars->getVar($keys), $s); } $s=str_replace($this->_vars->keys(), $this->_vars->values(), $s); if (count($this->_runningProc) > 0) { $procVarIdx=array_search($this->_runningProc[count($this->_runningProc)-1], $this->_to_names); if ($procVarIdx!==false) { foreach ($this->_to_args[$procVarIdx]->keys() as $key) { $s=str_replace(':'.$key, $this->_to_args[$procVarIdx]->getVar($key), $s); } } } $s=str_replace('RANDOMNUMBER0_100',mt_rand(0,100), $s); $value=LogoParser::str2num($s, $c); $realnum=false; if (!$c) { $realnum=is_float($value); //$value=$value; return (true); } $value=(integer)$value; return (false); } public static function getNextWord($s, $i, $U, &$j) { $_k=$i; while (($i<=$U)&&(isSpace($s[$i]))) { $i++; } if ($i>$U) { $j=$U; return (trim(substr($s, $_k))); } $ch = $s[$i]; if (($ch=='[') || ($ch==']') || ($ch==';') || ($ch=='#')) { $j=$i; return ($ch); } $_k = $i; while ( ( ($i<=$U) ) && ($s[$i]!='[') && ($s[$i]!=']') && ($s[$i]!=';') && ($s[$i]!='#') ) { if ($i+1<=$U) { if ($s[$i]=='/') { $ch=$s[$i+1]; if (($ch=='/')||($ch=='*')) { break; } } } if (isSpace($s[$i])) { break; } $i++; } $j=$i-1; return trim((substr($s,$_k, $i-$_k))); } function printWarnings() { $i=0; $j=-$this->_logo->getImageHY(); $t=1; $maxcount = count($this->_warnings); while ($i<$maxcount) { $j+=$this->_logo->printText(-$this->_logo->getImageHX(), $j, $this->getMsg($this->_warnings[$i], $this->_warnings[$i+1], $this->_warnings[$i+2], $this->_warnings[$i+3]) ); $t++; if ($t>$this->_maxW) { $j+=$this->_logo->printText(-$this->_logo->getImageHX(), $j, $this->getMsg(LOGO_INFORMATION_TOO_MANY_WARNING) ); break; } $i+=4; } return ($this->_logo->getIYd($j)); } function pushWarn($code, $x, $y, $w) { $t=(integer)(((count($this->_warnings)+1)/4)-1); if ($t>$this->_maxW) { return; } $same=false; $maxcount = count($this->_warnings); for ($i=0;$i<$maxcount;$i+=4) { if ( ($code==$this->_warnings[$i]) && ($x==$this->_warnings[$i+1]) && ($y==$this->_warnings[$i+2]) ) { $same=true; break; } } if (!$same) { array_push($this->_warnings, $code, $x, $y, $w); } } function getX() { return ($this->_lineX); } function getY() { return ($this->_lineY); } function getW() { return ($this->_lineW); } function _getXY($s, $d, $w='') { $i=0; $x=0; $j=1; while ($i<$d) { $x++; if (($s[$i]=="\n")) { $j++; $x=0; } $i++; } $this->_lineX=$x+1; $this->_lineY=$j; $this->_lineW=$w; } function removeLocalVars() { $__tmp = count($this->_runningProc); if ($__tmp == 0) return; $k=array_search($this->_runningProc[$__tmp-1], $this->_to_names); if ($k===false) return; //$s=$this->_localmake; foreach ($this->_localmake as $key=>$v) { if ($v[0]==$this->_to_names[$k]) { $this->_to_args[$k]->delVar($v[1]); unset($this->_localmake[$key]); } } } function _parse($s, $i, $U) { if ($i > $U) { return (LOGO_OK); } $i--; while ($i <= $U) { $i++; if ($i > $U) { break; } /* Check if Time Out */ $this->_endT=abs(round(microtime()-$this->_runningT,5)); if ($this->_endT>$this->_maxT) { $this->_getXY($s, $i+1); $this->_src_line=__LINE__; return (LOGO_ERROR_TIME_OUT); } /* Skip Spaces */ if (isSpace($s[$i])) continue; /* Comments Start */ if ($i+1<$U) { if (($s[$i]=='/')&&($s[$i+1]=='*')) { $i+=2; while ( ($i+1<$U) && !(($s[$i]=='*')&&($s[$i+1]=='/')) ) { $i++; } if (($i+1<$U)&&($s[$i]=='*')&&($s[$i+1]=='/')) { $i++; continue; } else { $this->_getXY($s, $i); $this->_src_line=__LINE__; return (LOGO_ERROR_UNFINISHED_COMMENTS); } } if (($s[$i]=='/')&&($s[$i+1]=='/')) { $i+=2; while (($i<$U)&&($s[$i]!="\n")) { $i++; } if (($i<$U) && ($s[$i]=="\n")) { continue; } break; } } if (($s[$i]==';')||($s[$i]=='#')) { $i++; while (($i<$U)&&($s[$i]!="\n")) { $i++; } if (($i<$U) && ($s[$i]=="\n")) { continue; } break; } /* Coments Ends */ /* Group */ if (!$this->_inProc) { if ($s[$i]=='[') { if (count($this->_coms)==0) { $this->_getXY($s, $i); $this->_src_line=__LINE__; return (LOGO_ERROR_UNKNOWN_GROUP); } $this->_repeat[] = $i; //array_push($this->_repeat, $i); continue; } if ($s[$i]==']') { if (count($this->_repeat)==0) { $this->_getXY($s, $i); $this->_src_line=__LINE__; return (LOGO_ERROR_TOO_MANY_RIGHT); } $groupstart=array_pop($this->_repeat); if (count($this->_repeat)>0) { continue; } $k=array_pop($this->_coms); if (($k=='REPEAT')) { if (count($this->_repeatT)==0) { $this->_getXY($s, $i); $this->_src_line=__LINE__; return (LOGO_ERROR_NO_REPEAT_TIME); } $lastRT=array_pop($this->_repeatT); $t=0; for ($tt=0;$tt<($lastRT);$tt++) { $this->_vars->_setVar('REPCOUNT',$tt+1); $t=$this->_parse($s, $groupstart+1, $i-1); if ($t!=LOGO_OK) break; } if ($t==LOGO_OK_PROC_RETURN) { if ($this->_rlvl==0) { $this->_rlvl=1; return ($t); } continue; } if (($t==LOGO_OK)) { continue; } else { return ($t); } } else if ($k=='IF') { if (count($this->_repeatT)==0) { $this->_getXY($s, $i); $this->_src_line=__LINE__; return (LOGO_ERROR_MISSING_BOOLEAN); } $lastRT=array_pop($this->_repeatT); if ($lastRT>0) { $lastRT=1; } else { $lastRT=0; } $t=0; for ($tt=0;$tt<$lastRT;$tt++) { $t=$this->_parse($s, $groupstart+1, $i-1); if ($t!=LOGO_OK) break; } if ($t==LOGO_OK_PROC_RETURN) { if ($this->_rlvl==0) { $this->_rlvl=1; return ($t); } continue; } if (($t==LOGO_OK)) { continue; } else { return ($t); } } $this->_getXY($s, $i); $this->_src_line=__LINE__; return (LOGO_ERROR_UNSUPPORTED_GROUP_ACTION); } /* Skip parsing until complete group statement */ if (count($this->_repeat)>0) { continue; } } // Not _inProc /* Get a word */ $w=(strtoupper(LogoParser::getNextWord($s, $i, $U, $j))); if (strlen($w)==0) { break; } if ($this->_inProc) { if ($w=='TO') { $this->_getXY($s, $i); $this->_src_line=__LINE__; return (LOGO_ERROR_NESTED_PROCEDURE_NOT_ALLOWED); } else if ($w=='END') { $this->_inProc=false; $this->_to_end[] = $i-1; //array_push($this->_to_end,$i); $i=$j; $this->_to_counting_args=false; continue; } else { if ($this->_to_counting_args) { $ww=substr($w,1); if (($w[0]==':')&&($this->isGood($ww))) { $counttoargs=count($this->_to_args); if ($counttoargs == 0) { $this->_to_args[] = new Storage(); $counttoargs = 0; } else { $counttoargs--; } //$counttoargs = count($this->_to_args); if ($this->_to_args[$counttoargs]->isVar($ww)) { $this->_getXY($s, $i); $this->_src_line=__LINE__; return (LOGO_ERROR_REPEAT_PROC_ARG); } else { $this->_to_args[$counttoargs]->_setVar($ww, 0); } } else { $this->_to_counting_args=false; } } $i=$j; continue; } } // Not _inProc else { if ($w=='END') { $this->_getXY($s, $i); $this->_src_line=__LINE__; return (LOGO_ERROR_NO_TO); } } /* if (count($this->_repeatT)>0) { if (($w=='REPEAT')||($w=='IF')) { array_push($this->_repeatT,-1); } $i=$j; continue; } */ if (count($this->_coms)>0) { $k=array_pop($this->_coms); if ($k=='TO') { if ( in_array($w, $this->_keywords) || in_array($w, $this->_keywords_args) ) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; return (LOGO_ERROR_KEYWORD_IN_USE); } if ( in_array($w, $this->_to_names)) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; return (LOGO_ERROR_PROC_DEFINED); } if (!LogoParser::isSymbol($w)) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; return (LOGO_ERROR_INVALID_SYMBOL); } if (count($this->_to_names)+1>$this->_maxProc) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; return (LOGO_ERROR_TOO_MANY_PROC); } $this->_inProc=true; //array_push($this->_to_names, $w); $this->_to_names[] = $w; //array_push($this->_to_start, $i+strlen($w)); $this->_to_start[] = $i + strlen($w); $this->_to_counting_args=true; //array_push($this->_to_args, new Storage()); $this->_to_args[] = new Storage(); $i=$j; continue; } //array_push($this->_coms, $k); $this->_coms[] = $k; } // Commands with at least one arg if (in_array($w, $this->_keywords_args)) { if (count($this->_coms)>0) { $this->_getXY($s, $i); $this->_src_line=__LINE__; return (LOGO_ERROR_MISSING_ARG); } //array_push($this->_coms, $w); $this->_coms[] = $w; $i=$j; continue; } $procpos=array_search($w, $this->_to_names); if ($procpos!==false) { $argnum=$this->_to_args[$procpos]->getSize(); if ($argnum>0) { //array_push($this->_coms, $w); $this->_coms[] = $w; $i=$j; continue; } /* Procedure with no arguments */ //array_push($this->_runningProc, $w); $this->_runningProc[] = $w; if (count($this->_runningProc)>$this->_maxProcLevel) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; return (LOGO_ERROR_TOO_MANY_LEVELS); } //array_push($this->_var_stack, $this->_to_args[$procpos]); $this->_var_stack[] = clone $this->_to_args[$procpos]; $this->removeLocalVars(); $ret=$this->_parse($s, $this->_to_start[$procpos], $this->_to_end[$procpos]); $this->_to_args[$procpos]=array_pop($this->_var_stack); array_pop($this->_runningProc); if ($ret==LOGO_OK_PROC_RETURN) { if ($this->_rlvl==0) { $this->_rlvl=1; return ($ret); } $i=$j; continue; } if (($ret==LOGO_OK)||($ret==LOGO_OK_PROC_RETURN)) { $i=$j; continue; } else { return ($ret); } } // Commands with no args if (in_array($w, $this->_keywords)) { if ($w=='STOP') { if (($this->_inProc)||(count($this->_runningProc)>0)) { $this->_rlvl=0; return (LOGO_OK_PROC_RETURN); } else { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; return (LOGO_ERROR_STOP_NOT_IN_PROC); } } if (($w=='PU')||($w=='PENUP')) { if (count($this->_coms)>0) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; return (LOGO_ERROR_MISSING_ARG); } $this->_logo->pu(); $i=$j; continue; } if (($w=='PE')||($w=='PENERASER')) { if (count($this->_coms)>0) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; return (LOGO_ERROR_MISSING_ARG); } $this->_logo->pe(); $i=$j; continue; } if (($w=='PD')||($w=='PENDOWN')||($w=='PENNORMAL')) { if (count($this->_coms)>0) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; return (LOGO_ERROR_MISSING_ARG); } $this->_logo->pd(); $i=$j; continue; } if (($w=='ST')||($w=='SHOWTURTLE')) { if (count($this->_coms)>0) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; return (LOGO_ERROR_MISSING_ARG); } $this->_logo->st(); $i=$j; continue; } if ($w=='DOT') { if (count($this->_coms)>0) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; return (LOGO_ERROR_MISSING_ARG); } $this->_logo->dot(); $i=$j; continue; } if ($w=='FILL') { if (count($this->_coms)>0) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; return (LOGO_ERROR_MISSING_ARG); } $this->_logo->fill(); $i=$j; continue; } if ($w=='HOME') { if (count($this->_coms)>0) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; return (LOGO_ERROR_MISSING_ARG); } $this->_logo->home(); $this->_vars->_setVar('POSX', $this->_logo->getX()); $this->_vars->_setVar('POSY', $this->_logo->getY()); $this->_vars->_setVar('DEGREE', $this->_logo->getD()); $i=$j; continue; } if (($w=='HT')||($w=='HIDETURTLE')) { if (count($this->_coms)>0) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; return (LOGO_ERROR_MISSING_ARG); } $this->_logo->ht(); $i=$j; continue; } if (($w=='WINDOW')||($w=='FENCE')||($w=='WRAP')) { if (count($this->_coms)>0) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; return (LOGO_ERROR_MISSING_ARG); } if ($w=='WINDOW') { $this->_logo->setWrap(LOGO_WINDOW); } else if ($w=='FENCE') { $this->_logo->setWrap(LOGO_FENCE); } else { $this->_logo->setWrap(LOGO_WRAP); } $this->_vars->_setVar('POSX', $this->_logo->getX()); $this->_vars->_setVar('POSY', $this->_logo->getY()); $this->_vars->_setVar('DEGREE', $this->_logo->getD()); $i=$j; continue; } if (($w=='CS')||($w=='CLEANSCREEN')) { if (count($this->_coms)>0) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; return (LOGO_ERROR_MISSING_ARG); } $this->_logo->cs(); $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; $this->pushWarn( LOGO_WARNING_NOT_FULLY_IMPLEMENTED, $this->_lineX, $this->_lineY, $w ); $i=$j; $this->_vars->_setVar('POSX', $this->_logo->getX()); $this->_vars->_setVar('POSY', $this->_logo->getY()); $this->_vars->_setVar('DEGREE', $this->_logo->getD()); continue; } } // end of Commands with no args if (count($this->_coms)>0) { $k=array_pop($this->_coms); if ($k=='LOCAL') { if (($w[0]!='"')) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; return (LOGO_ERROR_MAKE_NEED_QUOTE); } $ww=substr($w,1); if (!$this->isGood($ww)) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; return (LOGO_ERROR_MAKE_INVALID_NAME); } if (!(($this->_inProc)||(count($this->_runningProc)>0))) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; $this->pushWarn( LOGO_WARNING_LOCAL_MAKE_GLOBALUSE, $this->_lineX, $this->_lineY, $w ); } else { $counttoargs=count($this->_runningProc); if ($counttoargs > 0) //array_push($this->_localmake, array($this->_runningProc[$counttoargs-1],$ww)); $this->_localmake[] = array($this->_runningProc[$counttoargs-1],$ww); } $i=$j; continue; } else if (($k=='MAKE')||($k=='LOCALMAKE')) { if (count($this->_args)==0) { if (($w[0]!='"')) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; return (LOGO_ERROR_MAKE_NEED_QUOTE); } $ww=substr($w,1); if (!$this->isGood($ww)) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; return (LOGO_ERROR_MAKE_INVALID_NAME); } //array_push($this->_coms, $k); $this->_coms[] = $k; //array_push($this->_args, $ww); $this->_args[] = $ww; $i=$j; continue; } else { $t=array_pop($this->_args); if ($w[0]=="\"") { $ww=substr($w,1); if ($k=='MAKE') { $this->_makevars->_setVar($t, $ww); $i=$j; continue; } else { if (!(($this->_inProc)||(count($this->_runningProc)>0))) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; $this->pushWarn( LOGO_WARNING_LOCAL_MAKE_GLOBALUSE, $this->_lineX, $this->_lineY, $w ); $this->_makevars->_setVar($t, $ww); $i=$j; continue; } else { $counttoargs=count($this->_runningProc); if ($counttoargs > 0) { //array_push($this->_localmake, array( //$this->_runningProc[$counttoargs-1], //$t //)); $this->_localmake[] = array( $this->_runningProc[$counttoargs-1], $t ); $procpos=array_search($this->_runningProc[$counttoargs-1], $this->_to_names); if ($procpos!==false) { $this->_to_args[$procpos]->_setVar($t, $ww); } $i=$j; continue; } } } } else { if ($this->isNumber($w, $_real, $value)) { if ($k=='MAKE') { $this->_makevars->_setVar($t, $value); $i=$j; continue; } else { if (!(($this->_inProc)||(count($this->_runningProc)>0))) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; $this->pushWarn( LOGO_WARNING_LOCAL_MAKE_GLOBALUSE, $this->_lineX, $this->_lineY, $w ); $this->_makevars->_setVar($t, $value); $i=$j; continue; } else { $counttoargs=count($this->_runningProc); if ($counttoargs > 0) { $this->_localmake[] = array( $this->_runningProc[$counttoargs-1], $t ); $procpos=array_search($this->_runningProc[$counttoargs-1], $this->_to_names); if ($procpos!==false) { $this->_to_args[$procpos]->_setVar($t, $value); } $i=$j; continue; } } } } else { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; return (LOGO_ERROR_MAKE_INVALID_VALUE); } } } }// end of make, local make //array_push($this->_coms, $k); $this->_coms[] = $k; } if ($this->isNumber($w, $realnum, $value)) { if (count($this->_coms)==0) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; return (LOGO_ERROR_MISSING_COMMAND); } /* if ($realnum) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; $this->pushWarn( LOGO_WARNING_NUMBER_ROUNDED, $this->_lineX, $this->_lineY, $w ); } */ $k=array_pop($this->_coms); $procpos=array_search($k, $this->_to_names); if ($procpos!==false) { $argnum=$this->_to_args[$procpos]->getSize(); if ($argnum>count($this->_args)+1) { //array_push($this->_coms, $k); $this->_coms[] = $k; //array_push($this->_args, $w); $this->_args[] = $w; $i=$j; continue; } //array_push($this->_args, $w); $this->_args[] = $w; $u=0; //array_push($this->_var_stack, $this->_to_args[$procpos]); $this->_var_stack[] = clone $this->_to_args[$procpos]; $this->removeLocalVars(); $varlist=$this->_to_args[$procpos]->keys(); foreach ($varlist as $key) { $this->isNumber($this->_args[$u++], $real, $value); $this->_to_args[$procpos]->_setVar($key,$value); } $usa=$this->_to_start[$procpos]+1; for ($sk=0;$sk<$argnum;$sk++) { $t=LogoParser::getNextWord($s, $usa, $this->_to_end[$procpos], $usa); $usa++; } //array_push($this->_runningProc, $k); $this->_runningProc[] = $k; if (count($this->_runningProc)>$this->_maxProcLevel) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; return (LOGO_ERROR_TOO_MANY_LEVELS); } for (; $u>0; $u--) { array_pop($this->_args); } // recursion $ret=false; $ret=$this->_parse($s, $usa, $this->_to_end[$procpos]); $this->_to_args[$procpos]=array_pop($this->_var_stack); array_pop($this->_runningProc); if ($ret==LOGO_OK_PROC_RETURN) { if ($this->_rlvl==0) { $this->_rlvl=1; return ($ret); } $i=$j; continue; } if (($ret==LOGO_OK)||($ret==LOGO_OK_PROC_RETURN)) { $i=$j; continue; } else { return ($ret); } } else if (($k=='BK')||($k=='BACK')||($k=='FD')||($k=='FORWARD')||($k=='WALK')||($k=='JUMP')||($k=='JMP')) { if ($this->_logo->isWrap()==LOGO_FENCE) { $x1=$this->_logo->getX(); $y1=$this->_logo->getY(); $x2=round($x1+$value*sin($this->_logo->getD()*pi()/180)); $y2=round($y1-$value*cos($this->_logo->getD()*pi()/180)); if ($this->_logo->isOutXY($x2,$y2)) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; $this->pushWarn( LOGO_WARNING_TURTLE_OUT, $this->_lineX, $this->_lineY, $w ); } } if ($k[0]=='J') { $this->_logo->jump($value); } else if ($k[0]=='B') { $this->_logo->fd(-$value); } else { $this->_logo->fd($value); } $this->_vars->_setVar('POSX', $this->_logo->getX()); $this->_vars->_setVar('POSY', $this->_logo->getY()); } else if (($k=='RT')||($k=='RIGHT')||($k=='TURN')) { $this->_logo->rt($value); $this->_vars->_setVar('DEGREE', $this->_logo->getD()); } else if (($k=='LT')||($k=='LEFT')) { $this->_logo->lt($value); $this->_vars->_setVar('DEGREE', $this->_logo->getD()); } else if (($k=='SETPC')||($k=='SETPENCOLOR')||($k=='SETPENCOLOUR')) { $value=(integer)$value; if (($value>=0)&&($value<=15)) { $this->_logo->setPCrgb($this->Logo_Color_R[$value], $this->Logo_Color_G[$value], $this->Logo_Color_B[$value]); } else { if ($this->_istruecolor) { $this->_logo->setPC($value); } else { $this->_src_line=__LINE__; $this->pushWarn( LOGO_WARNING_UNSUPPORTED_COLOR, $this->_lineX, $this->_lineY, $w ); } } $this->_vars->_setVar('PENCOLOR',$value); $this->_vars->_setVar('PENCOLOUR',$value); } else if (($k=='SETFC')||($k=='SETFLOODCOLOR')||($k=='SETFLOODCOLOUR')) { $value=(integer)$value; if (($value>=0)&&($value<=15)) { $this->_logo->setFCrgb($this->Logo_Color_R[$value], $this->Logo_Color_G[$value], $this->Logo_Color_B[$value]); } else { if ($this->_istruecolor) { $this->_logo->setFC($value); } else { $this->_src_line=__LINE__; $this->pushWarn(LOGO_WARNING_UNSUPPORTED_COLOR, $this->_lineX, $this->_lineY, $w ); } } $this->_vars->_setVar('FLOODCOLOR',$value); $this->_vars->_setVar('FLOODCOLOUR',$value); } else if (($k=='SETSC')||($k=='SETSCREENCOLOR')||($k=='SETSCREENCOLOUR')) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; $this->pushWarn( LOGO_WARNING_UNSUPPORTED_BG_CHANGE, $this->_lineX, $this->_lineY, $w ); if (($value>=0)&&($value<=15)) { $this->_logo->setSCrgb($this->Logo_Color_R[$value], $this->Logo_Color_G[$value], $this->Logo_Color_B[$value]); } else { if ($this->_istruecolor) { $this->_logo->setSC($value); } else { $this->_src_line=__LINE__; $this->pushWarn(LOGO_WARNING_UNSUPPORTED_COLOR, $this->_lineX, $this->_lineY, $w ); } } $this->_vars->_setVar('SCREENCOLOR',$value); $this->_vars->_setVar('SCREENCOLOUR',$value); } else if (($k=='REPEAT')||($k=='IF')) { //array_push($this->_repeatT, round($value)); $this->_repeatT[] = round($value); //array_push($this->_coms, $k); $this->_coms[] = $k; } else if (($k=='SETXY')||($k=='SETPOS')) { if (count($this->_args)==0) { //array_push($this->_coms, $k); $this->_coms[] = $k; //array_push($this->_args, $value); $this->_args[] = $value; } else { $t=array_pop($this->_args); $this->_logo->lineTo($t, -$value, true); if ($this->_logo->isWrap()==LOGO_FENCE) { if ($this->_logo->isOutXY($t, -$value)) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; $this->pushWarn( LOGO_WARNING_TURTLE_OUT, $this->_lineX, $this->_lineY, $w ); } } } $this->_vars->_setVar('POSX', $this->_logo->getX()); $this->_vars->_setVar('POSY', $this->_logo->getY()); } else if (($k=='ARC')||($k=='ARC2')) { if (count($this->_args)==0) { //array_push($this->_coms, $k); $this->_coms[] = $k; //array_push($this->_args, $value); $this->_args[] = $value; } else { $t=array_pop($this->_args); $this->_logo->arc($t, $value); } } else if (($k=='DOTXY')) { if (count($this->_args)==0) { //array_push($this->_coms, $k); $this->_coms[] = $k; //array_push($this->_args, $value); $this->_args[] = $value; } else { $t=array_pop($this->_args); $this->_logo->dotxy($t, -$value); } } else if (($k=='SLEEP')||($k=='PRINT')||($k=='IMGW')||($k=='IMGH')||($k=='WAIT')) { // Not implemented in Web-version $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; $this->pushWarn( LOGO_WARNING_NOT_FULLY_IMPLEMENTED, $this->_lineX, $this->_lineY, $k.' '.$w ); } else if ($k=='SETX') { $this->_logo->lineTo($value, $this->_logo->getY(), true); if ($this->_logo->isWrap()==LOGO_FENCE) { if (($value>$this->_logo->getImageHX())||($value<-$this->_logo->getImageHX())) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; $this->pushWarn( LOGO_WARNING_TURTLE_OUT, $this->_lineX, $this->_lineY, $w ); } } $this->_vars->_setVar('POSX', $this->_logo->getX()); $this->_vars->_setVar('POSY', $this->_logo->getY()); } else if ($k=='SETY') { $this->_logo->lineTo($this->_logo->getX(), -$value, true); if ($this->_logo->isWrap()==LOGO_FENCE) { if ((-$value>$this->_logo->getImageHY())||(-$value<-$this->_logo->getImageHY())) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; $this->pushWarn( LOGO_WARNING_TURTLE_OUT, $this->_lineX, $this->_lineY, $w ); } } $this->_vars->_setVar('POSX', $this->_logo->getX()); $this->_vars->_setVar('POSY', $this->_logo->getY()); } else if ($k=='TO') { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; return (LOGO_ERROR_INVALID_PROC_NAME); } else if (($procpos=array_search($w, $this->_to_names))!==false) { $argnum=$this->_to_args[$procpos]->getSize(); if ($argnum>0) { //array_push($this->_coms, $w); $this->_coms[] = $w; $i=$j; continue; } //array_push($this->_runningProc, $w); $this->_runningProc[] = $w; if (count($this->_runningProc)>$this->_maxProcLevel) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; return (LOGO_ERROR_TOO_MANY_LEVELS); } //array_push($this->_var_stack, $this->_to_args[$procpos]); $this->_var_stack[] = clone $this->_to_args[$procpos]; $this->removeLocalVars(); $ret=$this->_parse($s, $this->_to_start[$procpos], $this->_to_end[$procpos]); $this->_to_args[$procpos]=array_pop($this->_var_stack); array_pop($this->_runningProc); if ($ret==LOGO_OK_PROC_RETURN) { if ($this->_rlvl==0) { $this->_rlvl=1; return ($ret); } $i=$j; continue; } if (($ret==LOGO_OK)||($ret==LOGO_OK_PROC_RETURN)) { $i=$j; continue; } else { return ($ret); } } $i=$j; continue; } // end of isNumber /* The word is Not Recongized */ if ($w) { $this->_getXY($s, $i, $w); $this->_src_line=__LINE__; return (LOGO_ERROR_BAD_COMMAND); } }// end of processing /* Error Handling */ $this->_getXY($s, $U); if ($this->_inProc) { $this->_src_line=__LINE__; return (LOGO_ERROR_END_NOT_FOUND); } else if (count($this->_repeat) > 0) { $this->_src_line=__LINE__; return (LOGO_ERROR_TOO_MANY_LEFT); } else if (count($this->_repeatT) > 0) { $this->_getXY($s, $i); $this->_src_line=__LINE__; $this->pushWarn( LOGO_WARNING_MISSING_REPEAT_BODY, $this->_lineX, $this->_lineY, ''); } else if (count($this->_coms) > 0) { $this->_src_line=__LINE__; return (LOGO_ERROR_MISSING_ARG); } // Return OK return (LOGO_OK); } function parse($s='') { $this->_runningT = microtime(); $t = false; $len = strlen($s); if ($len > 0) { $t = $this->_parse($s, 0, $len - 1); } $this->_logo->drawTurtle(); return ($t); } } ?>