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jedi-academy/codemp/icarus/Interpreter.cpp
James Monroe 684d1bcb3b Jedi Academy Release
2013-04-04 17:35:38 -05:00

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// Token Interpreter
//
// -- jweier
#include <direct.h> //For getcwd()
#include <conio.h> //For getch()
#include <stdio.h>
#include "Tokenizer.h"
#include "BlockStream.h"
#include "Interpreter.h"
/*
===================================================================================================
Table Definitions
===================================================================================================
*/
//FIXME: The following tables should be passed in to the interpreter for flexibility
//Symbol Table
keywordArray_t CInterpreter::m_symbolKeywords[] =
{
//Blocks
"{", TK_BLOCK_START,
"}", TK_BLOCK_END,
//Vectors
"<", TK_VECTOR_START,
">", TK_VECTOR_END,
//Groups
"(", TK_OPEN_PARENTHESIS,
")", TK_CLOSED_PARENTHESIS,
"=", TK_EQUALS,
"!", TK_NOT,
//End
"", TK_EOF,
};
keywordArray_t CInterpreter::m_conditionalKeywords[] =
{
"", TK_EOF,
};
//ID Table
keywordArray_t CInterpreter::m_IDKeywords[] =
{
"AFFECT", ID_AFFECT,
"SOUND", ID_SOUND,
"MOVE", ID_MOVE,
"ROTATE", ID_ROTATE,
"WAIT", ID_WAIT,
"SET", ID_SET,
"LOOP", ID_LOOP,
"PRINT", ID_PRINT,
"TAG", ID_TAG,
"USE", ID_USE,
"FLUSH", ID_FLUSH,
"RUN", ID_RUN,
"KILL", ID_KILL,
"REMOVE", ID_REMOVE,
"CAMERA", ID_CAMERA,
"GET", ID_GET,
"RANDOM", ID_RANDOM,
"IF", ID_IF,
"ELSE", ID_ELSE,
"REM", ID_REM,
"FLOAT", TK_FLOAT,
"VECTOR", TK_VECTOR,
"STRING", TK_STRING,
"TASK", ID_TASK,
"DO", ID_DO,
"DECLARE", ID_DECLARE,
"FREE", ID_FREE,
"DOWAIT", ID_DOWAIT,
"SIGNAL", ID_SIGNAL,
"WAITSIGNAL", ID_WAITSIGNAL,
"PLAY", ID_PLAY,
"", ID_EOF,
};
//Type Table
keywordArray_t CInterpreter::m_typeKeywords[] =
{
//Set types
"ANGLES", TYPE_ANGLES,
"ORIGIN", TYPE_ORIGIN,
//Affect types
"INSERT", TYPE_INSERT,
"FLUSH", TYPE_FLUSH,
//Get types
"FLOAT", TK_FLOAT,
"INT", TK_INT,
"VECTOR", TK_VECTOR,
"STRING", TK_STRING,
"PAN", TYPE_PAN,
"ZOOM", TYPE_ZOOM,
"MOVE", TYPE_MOVE,
"FADE", TYPE_FADE,
"PATH", TYPE_PATH,
"ENABLE", TYPE_ENABLE,
"DISABLE", TYPE_DISABLE,
"SHAKE", TYPE_SHAKE,
"ROLL", TYPE_ROLL,
"TRACK", TYPE_TRACK,
"FOLLOW", TYPE_FOLLOW,
"DISTANCE", TYPE_DISTANCE,
//End
"", TYPE_EOF,
};
/*
===================================================================================================
Constructor / Destructor
===================================================================================================
*/
CInterpreter::CInterpreter()
{
}
CInterpreter::~CInterpreter()
{
}
/*
===================================================================================================
Error Handling
===================================================================================================
*/
int CInterpreter::Error( char *format, ... )
{
va_list argptr;
char *error_file, error_msg[1024]="", work_dir[1024]="", out_msg[1024]="";
int error_line = m_iCurrentLine; // m_tokenizer->GetCurLine();
m_tokenizer->GetCurFilename( &error_file );
if (!error_file)
{
// 99% of the time we'll get here now, because of pushed parse streams
//
error_file = (char *)m_sCurrentFile.c_str();
}
va_start (argptr, format);
vsprintf (error_msg, format, argptr);
va_end (argptr);
strcpy((char *) work_dir, getcwd( (char *) &work_dir, 1024 ) );
if (error_file[1] == ':')
{
sprintf((char *) out_msg, "%s (%d) : error: %s\n", error_file, error_line, error_msg);
}
else
{
sprintf((char *) out_msg, "%s\\%s (%d) : error: %s\n", work_dir, error_file, error_line, error_msg);
}
if (m_sCurrentLine.length())
{
strcat(out_msg, "\nLine:\n\n");
strcat(out_msg, m_sCurrentLine.c_str());
strcat(out_msg, "\n");
}
#ifdef __POP_UPS__
MessageBox( NULL, out_msg, "Error", MB_OK );
#else
printf(out_msg);
#endif
// A bit of kludge code that takes care of the case where there's some garbage at the beginning of the file
// before any blocks are read as valid. This is needed because ints are incapable of containing 0
//
// This'll mean that technically it's saying block 1 is wrong, rather than the one in between them, but I can
// live with that.
//
if (m_iBadCBlockNumber == 0)
{
m_iBadCBlockNumber = 1;
}
return false;
}
/*
===================================================================================================
Local Variable Functions
===================================================================================================
*/
/*
-------------------------
InitVars
-------------------------
*/
void CInterpreter::InitVars( void )
{
m_vars.clear();
m_varMap.clear();
}
/*
-------------------------
FreeVars
-------------------------
*/
void CInterpreter::FreeVars( void )
{
variable_v::iterator vi;
for ( vi = m_vars.begin(); vi != m_vars.end(); vi++ )
{
delete (*vi);
}
InitVars();
}
/*
-------------------------
AddVar
-------------------------
*/
variable_t *CInterpreter::AddVar( const char *name, int type )
{
variable_t *var;
var = new variable_t;
if ( var == NULL )
return NULL;
//Specify the type
var->type = type;
//Retain the name internally
strncpy( (char *) var->name, name, MAX_VAR_NAME );
//Associate it
m_varMap[ name ] = var;
return var;
}
/*
-------------------------
FindVar
-------------------------
*/
variable_t *CInterpreter::FindVar( const char *name )
{
variable_m::iterator vmi;
vmi = m_varMap.find( name );
if ( vmi == m_varMap.end() )
return NULL;
return (*vmi).second;
}
/*
-------------------------
GetVariable
-------------------------
*/
int CInterpreter::GetVariable( int type )
{
const char *varName;
variable_t *var;
CToken *token;
//Get the variable's name
token = m_tokenizer->GetToken( 0, 0 );
varName = token->GetStringValue();
//See if we already have a variable by this name
var = FindVar( varName );
//Variable names must be unique on creation
if ( var )
return Error( "\"%s\" : already exists\n", varName );
//Add the variable
AddVar( varName, type );
//Insert the variable into the stream
CBlock block;
block.Create( TYPE_VARIABLE );
block.Write( TK_FLOAT, (float) type );
block.Write( TK_STRING, varName );
m_blockStream->WriteBlock( &block );
token->Delete();
return true;
}
/*
===================================================================================================
ID Table Functions
===================================================================================================
*/
int CInterpreter::GetVector( CBlock *block )
{
//Look for a tag
if ( MatchTag() )
{
return GetTag( block );
}
//Look for a get
if ( MatchGet() )
{
return GetGet( block );
}
if ( Match( TK_VECTOR_START ) )
{
//Get the vector
block->Write( TK_VECTOR, (float) TK_VECTOR );
for (int i=0; i<3; i++)
GetFloat( block );
if (!Match( TK_VECTOR_END ))
{
return Error("syntax error : expected end of vector");
}
return true;
}
return false;
}
/*
===================================================================================================
MatchTag()
Attempts to match to a tag identifier.
===================================================================================================
*/
int CInterpreter::MatchTag( void )
{
CToken *token;
const char *idName;
int id;
token = m_tokenizer->GetToken( 0, 0 );
idName = token->GetStringValue();
id = FindSymbol( idName, m_IDKeywords );
if ( id != ID_TAG )
{
//Return the token
m_tokenizer->PutBackToken( token );
return false;
}
token->Delete();
return true;
}
/*
===================================================================================================
MatchGet()
Attempts to match to a get identifier.
===================================================================================================
*/
int CInterpreter::MatchGet( void )
{
CToken *token;
const char *idName;
int id;
token = m_tokenizer->GetToken( 0, 0 );
idName = token->GetStringValue();
id = FindSymbol( idName, m_IDKeywords );
if ( id != ID_GET )
{
//Return the token
m_tokenizer->PutBackToken( token );
return false;
}
token->Delete();
return true;
}
/*
===================================================================================================
MatchRandom()
Attempts to match to a random identifier.
===================================================================================================
*/
int CInterpreter::MatchRandom( void )
{
CToken *token;
const char *idName;
int id;
token = m_tokenizer->GetToken( 0, 0 );
idName = token->GetStringValue();
id = FindSymbol( idName, m_IDKeywords );
if ( id != ID_RANDOM )
{
//Return the token
m_tokenizer->PutBackToken( token );
return false;
}
token->Delete();
return true;
}
/*
===================================================================================================
FindSymbol()
Searches the symbol table for the given name. Returns the ID if found.
===================================================================================================
*/
int CInterpreter::FindSymbol( const char *name, keywordArray_t *table)
{
keywordArray_t *ids;
for (ids = table; (strcmp(ids->m_keyword, "")); ids++)
{
if (!stricmp(name, ids->m_keyword))
return ids->m_tokenvalue;
}
return -1;
}
/*
===================================================================================================
Match()
Looks ahead to the next token to try and match it to the passed token, consumes token on success.
===================================================================================================
*/
//NOTENOTE: LookAhead() was separated from Match() for clarity
int CInterpreter::Match( int token_id )
{
CToken *token;
token = m_tokenizer->GetToken( 0, 0 );
if ( token->GetType() != token_id )
{
//This may have been a check, so don't loose the token
m_tokenizer->PutBackToken( token );
return false;
}
return true;
}
/*
-------------------------
GetNextType
-------------------------
*/
int CInterpreter::GetNextType( void )
{
CToken *token = m_tokenizer->GetToken( 0, 0 );
int id = token->GetType();
m_tokenizer->PutBackToken( token );
return id;
}
/*
===================================================================================================
LookAhead()
Looks ahead without consuming on success.
===================================================================================================
*/
int CInterpreter::LookAhead( int token_id )
{
CToken *token;
token = m_tokenizer->GetToken( 0, 0 );
if ( token->GetType() != token_id )
{
m_tokenizer->PutBackToken( token );
return false;
}
m_tokenizer->PutBackToken( token );
return true;
}
/*
===================================================================================================
GetTokenName()
Returns the name of a token.
===================================================================================================
*/
const char *CInterpreter::GetTokenName( int token_id )
{
switch ( token_id )
{
case TK_STRING:
return "STRING";
break;
case TK_CHAR:
return "CHARACTER";
break;
case TK_IDENTIFIER:
return "IDENTIFIER";
break;
case TK_FLOAT:
return "FLOAT";
break;
case TK_INTEGER:
return "INTEGER";
break;
default:
return "UNKNOWN";
break;
}
}
/*
===================================================================================================
Token Value Functions
===================================================================================================
*/
/*
===================================================================================================
GetFloat()
Attempts to match and retrieve the value of a float token.
===================================================================================================
*/
int CInterpreter::GetFloat( CBlock *block )
{
CToken *token;
int type;
//Look for a get
if ( MatchGet() )
{
return GetGet( block );
}
//Look for a random
if ( MatchRandom() )
{
return GetRandom( block );
}
token = m_tokenizer->GetToken(0,0);
type = token->GetType();
//Floats can accept either int or float values
if ( ( type != TK_FLOAT ) && ( type != TK_INT ) )
{
return Error("syntax error : expected float; found %s", GetTokenName(type) );
}
if (type == TK_FLOAT)
{
block->Write( TK_FLOAT, (float) token->GetFloatValue() );
}
else
{
block->Write( TK_FLOAT, (float) token->GetIntValue() );
}
token->Delete();
return true;
}
/*
===================================================================================================
GetInteger()
Attempts to match and retrieve the value of an integer token.
===================================================================================================
*/
int CInterpreter::GetInteger( CBlock *block )
{
return GetFloat( block );
}
/*
===================================================================================================
GetString()
Attempts to match and retrieve the value of a string token.
===================================================================================================
*/
int CInterpreter::GetString( CBlock *block )
{
CToken *token;
int type;
//Look for a get
if ( MatchGet() )
{
return GetGet( block );
}
//Look for a random
if ( MatchRandom() )
{
return GetRandom( block );
}
token = m_tokenizer->GetToken(0, 0);
type = token->GetType();
if ( (type != TK_STRING) && (type != TK_CHAR) )
{
return Error("syntax error : expected string; found %s", GetTokenName(type));
}
//UGLY HACK!!!
const char *temptr;
char temp[1024];
temptr = token->GetStringValue();
if ( strlen(temptr)+1 > sizeof( temp ) )
{
return false;
}
for ( int i = 0; i < (int)strlen( temptr ); i++ )
{
if ( temptr[i] == '#' )
temp[i] = '\n';
else
temp[i] = temptr[i];
}
temp[ strlen( temptr ) ] = 0;
//UGLY HACK END!!!
block->Write( TK_STRING, (const char *) &temp );
token->Delete();
return true;
}
/*
===================================================================================================
GetIdentifier()
Attempts to match and retrieve the value of an indentifier token.
===================================================================================================
*/
int CInterpreter::GetIdentifier( CBlock *block )
{
CToken *token;
int type;
//FIXME: Should identifiers do this?
if ( MatchGet() )
{
if ( GetGet( block ) == false )
return false;
return true;
}
token = m_tokenizer->GetToken(0, 0);
type = token->GetType();
if ( type != TK_IDENTIFIER )
{
return Error("syntax error : expected indentifier; found %s", GetTokenName(type));
}
block->Write( TK_IDENTIFIER, (const char *) token->GetStringValue() );
token->Delete();
return true;
}
/*
===================================================================================================
GetEvaluator()
Attempts to match and retrieve the value of an evaluator token.
===================================================================================================
*/
int CInterpreter::GetEvaluator( CBlock *block )
{
CToken *token;
int type;
if ( MatchGet() )
return false;
if ( MatchRandom() )
return false;
token = m_tokenizer->GetToken(0, 0);
type = token->GetType();
token->Delete();
switch ( type )
{
case TK_GREATER_THAN:
case TK_LESS_THAN:
case TK_EQUALS:
case TK_NOT:
break;
case TK_VECTOR_START:
type = TK_LESS_THAN;
break;
case TK_VECTOR_END:
type = TK_GREATER_THAN;
break;
default:
return Error("syntax error : expected operator type, found %s", GetTokenName( type ) );
}
block->Write( type, 0 );
return true;
}
/*
===================================================================================================
GetAny()
Attempts to match and retrieve any valid data type.
===================================================================================================
*/
int CInterpreter::GetAny( CBlock *block )
{
CToken *token;
int type;
if ( MatchGet() )
{
if ( GetGet( block ) == false )
return false;
return true;
}
if ( MatchRandom() )
{
if ( GetRandom( block ) == false )
return false;
return true;
}
if ( MatchTag() )
{
if ( GetTag( block ) == false )
return false;
return true;
}
token = m_tokenizer->GetToken(0, 0);
type = token->GetType();
switch ( type )
{
case TK_FLOAT:
m_tokenizer->PutBackToken( token );
if ( GetFloat( block ) == false )
return false;
break;
case TK_INT:
m_tokenizer->PutBackToken( token );
if ( GetInteger( block ) == false )
return false;
break;
case TK_VECTOR_START:
m_tokenizer->PutBackToken( token );
if ( GetVector( block ) == false )
return false;
break;
case TK_STRING:
case TK_CHAR:
m_tokenizer->PutBackToken( token );
if ( GetString( block ) == false )
return false;
break;
case TK_IDENTIFIER:
m_tokenizer->PutBackToken( token );
if ( GetIdentifier( block ) == false )
return false;
break;
default:
return false;
}
return true;
}
/*
===================================================================================================
GetType()
Attempts to match and retrieve the value of a type token.
===================================================================================================
*/
int CInterpreter::GetType( char *get )
{
CToken *token;
char *string;
int type;
token = m_tokenizer->GetToken(0, 0);
type = token->GetType();
if ( type != TK_IDENTIFIER )
{
return Error("syntax error : expected identifier; found %s", GetTokenName(type));
}
string = (char *) token->GetStringValue();
if ( (strlen(string) + 1) > MAX_STRING_LENGTH)
{
Error("string exceeds 256 character limit");
return false;
}
strcpy(get, string);
return true;
}
/*
===================================================================================================
GetID()
Attempts to match and interpret an identifier.
===================================================================================================
*/
//FIXME: This should use an externally defined table to match ID and functions
int CInterpreter::GetID( char *id_name )
{
int id;
id = FindSymbol( id_name, m_IDKeywords );
if ( id == -1 )
return Error("'%s' : unknown identifier", id_name);
//FIXME: Function pointers would be awfully nice.. but not inside a class! Weee!!
switch (id)
{
//Affect takes control of an entity
case ID_AFFECT:
return GetAffect();
break;
//Wait for a specified amount of time
case ID_WAIT:
return GetWait();
break;
//Generic set call
case ID_SET:
return GetSet();
break;
case ID_LOOP:
return GetLoop();
break;
case ID_PRINT:
return GetPrint();
break;
case ID_USE:
return GetUse();
break;
case ID_FLUSH:
return GetFlush();
break;
case ID_RUN:
return GetRun();
break;
case ID_KILL:
return GetKill();
break;
case ID_REMOVE:
return GetRemove();
break;
case ID_CAMERA:
return GetCamera();
break;
case ID_SOUND:
return GetSound();
break;
case ID_MOVE:
return GetMove();
break;
case ID_ROTATE:
return GetRotate();
break;
case ID_IF:
return GetIf();
break;
case ID_ELSE:
//return Error("syntax error : else without matching if");
return GetElse(); //FIXME: Protect this call so that floating else's aren't allowed
break;
case ID_GET:
return Error("syntax error : illegal use of \"get\"");
break;
case ID_TAG:
return Error("syntax error : illegal use of \"tag\"");
break;
case ID_TASK:
return GetTask();
break;
case ID_DO:
return GetDo();
break;
case ID_DECLARE:
return GetDeclare();
break;
case ID_FREE:
return GetFree();
break;
case ID_REM:
GetRem();
break;
case ID_DOWAIT:
GetDoWait();
break;
case ID_SIGNAL:
GetSignal();
break;
case ID_WAITSIGNAL:
GetWaitSignal();
break;
case ID_PLAY:
GetPlay(); //Bad eighties slang joke... yeah, it's not really funny, I know...
break;
//Local variable types
case TK_FLOAT:
case TK_INT:
case TK_STRING:
case TK_VECTOR:
GetVariable( id );
break;
//Unknown ID
default:
case -1:
return Error("'%s' : unknown identifier", id_name);
break;
}
return true;
}
/*
===================================================================================================
ID Interpreting Functions
===================================================================================================
*/
/*
-------------------------
GetDeclare
-------------------------
*/
int CInterpreter::GetDeclare( void )
{
CBlock block;
char typeName[MAX_STRING_LENGTH];
int type;
block.Create( ID_DECLARE );
if (!Match( TK_OPEN_PARENTHESIS ))
return Error("syntax error : '(' not found");
if ( GetType( (char *) typeName ) == false )
return false;
type = FindSymbol( typeName, m_typeKeywords);
switch ( type )
{
case TK_FLOAT:
case TK_VECTOR:
case TK_STRING:
block.Write( TK_FLOAT, (float) type );
break;
default:
return Error("unknown identifier %s", typeName );
break;
}
if ( GetString( &block ) == false )
return false;
if (!Match( TK_CLOSED_PARENTHESIS ))
return Error("declare : too many parameters");
m_blockStream->WriteBlock( &block );
return true;
}
/*
-------------------------
GetFree
-------------------------
*/
int CInterpreter::GetFree( void )
{
CBlock block;
block.Create( ID_FREE );
if ( Match( TK_OPEN_PARENTHESIS ) == false )
return Error("syntax error : '(' not found");
if ( GetString( &block ) == false )
return false;
if ( Match( TK_CLOSED_PARENTHESIS ) == false )
return Error("free : too many parameters");
m_blockStream->WriteBlock( &block );
return true;
}
/*
===================================================================================================
GetIf()
Handles the if() conditional statement.
===================================================================================================
*/
// if ( STRING ? STRING )
int CInterpreter::GetIf( void )
{
CBlock block;
block.Create( ID_IF );
if ( Match( TK_OPEN_PARENTHESIS ) == false )
return Error("syntax error : '(' not found");
if ( GetAny( &block ) == false )
return false;
if ( GetEvaluator( &block ) == false )
return false;
if ( GetAny( &block ) == false )
return false;
if ( Match( TK_CLOSED_PARENTHESIS ) == false )
return Error("if : too many parameters");
m_blockStream->WriteBlock( &block );
return true;
}
/*
===================================================================================================
GetElse()
Handles the else() conditional statement.
===================================================================================================
*/
// else
int CInterpreter::GetElse( void )
{
CBlock block;
block.Create( ID_ELSE );
/*
if ( Match( TK_OPEN_PARENTHESIS ) == false )
return Error("syntax error : '(' not found");
*/
/*
if ( GetAny( &block ) == false )
return false;
if ( GetEvaluator( &block ) == false )
return false;
if ( GetAny( &block ) == false )
return false;
*/
/*
if ( Match( TK_CLOSED_PARENTHESIS ) == false )
return Error("sound : too many parameters");
*/
m_blockStream->WriteBlock( &block );
return true;
}
/*
===================================================================================================
GetTask()
Handles the task() sequence specifier.
===================================================================================================
*/
//task ( name ) { }
int CInterpreter::GetTask( void )
{
CBlock block;
block.Create( ID_TASK );
if (!Match( TK_OPEN_PARENTHESIS ))
return Error("syntax error : '(' not found");
if ( GetString( &block ) == false )
return false;
if (!Match( TK_CLOSED_PARENTHESIS ))
return Error("GetTask: too many parameters");
m_blockStream->WriteBlock( &block );
return true;
}
/*
===================================================================================================
GetDo()
Handles the do() function.
===================================================================================================
*/
//do ( taskName )
int CInterpreter::GetDo( void )
{
CBlock block;
block.Create( ID_DO );
if (!Match( TK_OPEN_PARENTHESIS ))
return Error("syntax error : '(' not found");
if ( GetString( &block ) == false )
return false;
if (!Match( TK_CLOSED_PARENTHESIS ))
return Error("do : too many parameters");
m_blockStream->WriteBlock( &block );
return true;
}
/*
===================================================================================================
GetGet()
Handles the get() function.
===================================================================================================
*/
// get( TYPE, NAME );
int CInterpreter::GetGet( CBlock *block )
{
char typeName[MAX_STRING_LENGTH];
int type;
block->Write( ID_GET, (float) ID_GET );
if (!Match( TK_OPEN_PARENTHESIS ))
return Error("syntax error : '(' not found");
if ( GetType( (char *) typeName ) == false )
return false;
type = FindSymbol( typeName, m_typeKeywords);
switch ( type )
{
case TK_FLOAT:
case TK_INT:
case TK_VECTOR:
case TK_STRING:
block->Write( TK_FLOAT, (float) type );
break;
default:
return Error("unknown identifier %s", typeName );
break;
}
if ( GetString( block ) == false )
return false;
if (!Match( TK_CLOSED_PARENTHESIS ))
return Error("affect : too many parameters");
return true;
}
/*
===================================================================================================
GetRandom()
Handles the random() function.
===================================================================================================
*/
// random( low, high );
int CInterpreter::GetRandom( CBlock *block )
{
block->Write( ID_RANDOM, (float) ID_RANDOM );
if (!Match( TK_OPEN_PARENTHESIS ))
return Error("syntax error : '(' not found");
if ( GetFloat( block ) == false )
return false;
if ( GetFloat( block ) == false )
return false;
if (!Match( TK_CLOSED_PARENTHESIS ))
return Error("affect : too many parameters");
return true;
}
/*
===================================================================================================
GetSound()
Handles the sound() function.
===================================================================================================
*/
// sound( NAME );
int CInterpreter::GetSound( void )
{
CBlock block;
block.Create( ID_SOUND );
if (!Match( TK_OPEN_PARENTHESIS ))
return Error("syntax error : '(' not found");
if ( GetIdentifier( &block ) == false )
return false;
if ( GetString( &block ) == false )
return false;
if (!Match( TK_CLOSED_PARENTHESIS ))
return Error("sound : too many parameters");
m_blockStream->WriteBlock( &block );
return true;
}
/*
===================================================================================================
GetMove()
Handles the move() function.
===================================================================================================
*/
// move( ORIGIN, ANGLES, DURATION );
int CInterpreter::GetMove( void )
{
CBlock block;
block.Create( ID_MOVE );
if (!Match( TK_OPEN_PARENTHESIS ))
return Error("syntax error : '(' not found");
if ( GetVector( &block ) == false )
return false;
//Angles are optional
if ( LookAhead( TK_VECTOR_START ) || LookAhead( TK_IDENTIFIER ) )
{
if ( GetVector( &block ) == false )
return false;
}
if ( GetFloat( &block ) == false )
return false;
if (!Match( TK_CLOSED_PARENTHESIS ))
return Error("move : too many parameters");
m_blockStream->WriteBlock( &block );
return true;
}
/*
===================================================================================================
GetRotate()
Handles the rotate() function.
===================================================================================================
*/
// move( ANGLES, DURATION );
int CInterpreter::GetRotate( void )
{
CBlock block;
block.Create( ID_ROTATE );
if (!Match( TK_OPEN_PARENTHESIS ))
return Error("syntax error : '(' not found");
if ( GetVector( &block ) == false )
return false;
if ( GetFloat( &block ) == false )
return false;
if (!Match( TK_CLOSED_PARENTHESIS ))
return Error("move : too many parameters");
m_blockStream->WriteBlock( &block );
return true;
}
/*
===================================================================================================
GetAffect()
Handles the affect() function.
===================================================================================================
*/
//FIXME: This should be externally defined
int CInterpreter::GetAffect( void )
{
CBlock block;
char typeName[MAX_STRING_SIZE];
int type;
block.Create( ID_AFFECT );
if (!Match( TK_OPEN_PARENTHESIS ))
return Error("syntax error : '(' not found");
if ( GetString( &block ) == false )
return false;
if (!LookAhead( TK_IDENTIFIER ))
return Error("syntax error : identifier not found");
if ( MatchGet() )
return Error("syntax error : illegal use of \"get\"");
if ( GetType( (char *) typeName ) == false )
return false;
type = FindSymbol( typeName, m_typeKeywords);
switch ( type )
{
case TYPE_INSERT:
case TYPE_FLUSH:
block.Write( TK_FLOAT, (float) type );
break;
default:
return Error("'%s': unknown affect type", typeName );
break;
}
if (!Match( TK_CLOSED_PARENTHESIS ))
return Error("affect : too many parameters");
if (!LookAhead( TK_BLOCK_START ))
return Error("syntax error : '{' not found");
m_blockStream->WriteBlock( &block );
return true;
}
/*
===================================================================================================
GetWait()
Handles the wait() function.
===================================================================================================
*/
//FIXME: This should be externally defined
int CInterpreter::GetWait( void )
{
CBlock block;
block.Create( ID_WAIT );
if (!Match( TK_OPEN_PARENTHESIS ))
return Error("syntax error : '(' not found");
if ( LookAhead( TK_STRING ) )
{
if ( GetString( &block ) == false )
return false;
}
else
{
if ( GetFloat( &block ) == false )
return false;
}
if (!Match( TK_CLOSED_PARENTHESIS ))
return Error("wait : too many parameters");
m_blockStream->WriteBlock( &block );
return true;
}
/*
===================================================================================================
GetSet()
Handles the set() function.
===================================================================================================
*/
//FIXME: This should be externally defined
int CInterpreter::GetSet( void )
{
CBlock block;
block.Create( ID_SET );
if (!Match( TK_OPEN_PARENTHESIS ))
return Error("syntax error : '(' not found");
if ( GetString( &block ) == false )
return false;
//Check for get placement
if ( MatchGet() )
{
if ( GetGet( &block ) == false )
return false;
}
else
{
switch( GetNextType() )
{
case TK_INT:
if ( GetInteger( &block ) == false )
return false;
break;
case TK_FLOAT:
if ( GetFloat( &block ) == false )
return false;
break;
case TK_STRING:
if ( GetString( &block ) == false )
return false;
break;
case TK_VECTOR_START:
if ( GetVector( &block ) == false )
return false;
break;
default:
if ( MatchTag() )
{
GetTag( &block );
break;
}
if ( MatchRandom() )
{
GetRandom( &block );
break;
}
return Error("unknown parameter type");
break;
}
}
if (!Match( TK_CLOSED_PARENTHESIS ))
return Error("set : too many parameters");
m_blockStream->WriteBlock( &block );
return true;
}
/*
===================================================================================================
GetLoop()
Handles the loop() function.
===================================================================================================
*/
int CInterpreter::GetLoop( void )
{
CBlock block;
block.Create( ID_LOOP );
if (!Match( TK_OPEN_PARENTHESIS ))
return Error("syntax error : '(' not found");
if ( LookAhead( TK_CLOSED_PARENTHESIS ) )
{
//-1 denotes an infinite loop
block.Write( TK_FLOAT, (float) -1);
}
else
{
if ( GetInteger( &block ) == false )
return false;
}
if (!Match( TK_CLOSED_PARENTHESIS ))
return Error("GetLoop : too many parameters");
m_blockStream->WriteBlock( &block );
return true;
}
/*
===================================================================================================
GetPrint()
Handles the print() function.
===================================================================================================
*/
int CInterpreter::GetPrint( void )
{
CBlock block;
block.Create( ID_PRINT );
if (!Match( TK_OPEN_PARENTHESIS ))
return Error("syntax error : '(' not found");
if ( GetString( &block ) == false )
return false;
if (!Match( TK_CLOSED_PARENTHESIS ))
return Error("print : too many parameters");
m_blockStream->WriteBlock( &block );
return true;
}
/*
===================================================================================================
GetUse()
Handles the use() function.
===================================================================================================
*/
int CInterpreter::GetUse( void )
{
CBlock block;
block.Create( ID_USE );
if (!Match( TK_OPEN_PARENTHESIS ))
return Error("syntax error : '(' not found");
if ( GetString( &block ) == false )
return false;
if (!Match( TK_CLOSED_PARENTHESIS ))
return Error("use : too many parameters");
m_blockStream->WriteBlock( &block );
return true;
}
/*
===================================================================================================
GetFlush()
Handles the flush() function.
===================================================================================================
*/
int CInterpreter::GetFlush( void )
{
CBlock block;
block.Create( ID_FLUSH );
if (!Match( TK_OPEN_PARENTHESIS ))
return Error("syntax error : '(' not found");
if (!Match( TK_CLOSED_PARENTHESIS ))
return Error("flush : too many parameters");
m_blockStream->WriteBlock( &block );
return true;
}
/*
===================================================================================================
GetRun()
Handles the run() function.
===================================================================================================
*/
int CInterpreter::GetRun( void )
{
CBlock block;
block.Create( ID_RUN );
if (!Match( TK_OPEN_PARENTHESIS ))
return Error("syntax error : '(' not found");
if ( GetString( &block ) == false )
return false;
if (!Match( TK_CLOSED_PARENTHESIS ))
return Error("run : too many parameters");
m_blockStream->WriteBlock( &block );
return true;
}
/*
===================================================================================================
GetKill()
Handles the kill() function.
===================================================================================================
*/
int CInterpreter::GetKill( void )
{
CBlock block;
block.Create( ID_KILL );
if (!Match( TK_OPEN_PARENTHESIS ))
return Error("syntax error : '(' not found");
if ( GetString( &block ) == false )
return false;
if (!Match( TK_CLOSED_PARENTHESIS ))
return Error("kill : too many parameters");
m_blockStream->WriteBlock( &block );
return true;
}
/*
===================================================================================================
GetRemove()
Handles the remove() function.
===================================================================================================
*/
int CInterpreter::GetRemove( void )
{
CBlock block;
block.Create( ID_REMOVE );
if (!Match( TK_OPEN_PARENTHESIS ))
return Error("syntax error : '(' not found");
if ( GetString( &block ) == false )
return false;
if (!Match( TK_CLOSED_PARENTHESIS ))
return Error("remove : too many parameters");
m_blockStream->WriteBlock( &block );
return true;
}
/*
===================================================================================================
GetRem()
Handles the rem() function.
===================================================================================================
*/
// this is just so people can put comments in scripts in BehavEd and not have them lost as normal comments would be.
//
int CInterpreter::GetRem( void )
{
CBlock block;
block.Create( ID_REM );
if (!Match( TK_OPEN_PARENTHESIS ))
return Error("syntax error : '(' not found");
// optional string?
if (Match( TK_CLOSED_PARENTHESIS ))
return true;
GetString( &block );
if (!Match( TK_CLOSED_PARENTHESIS ))
return Error("rem : function only takes 1 optional parameter");
return true;
}
/*
===================================================================================================
GetCamera()
Handles the camera() function.
===================================================================================================
*/
int CInterpreter::GetCamera( void )
{
CBlock block;
char typeName[MAX_STRING_SIZE];
int type;
block.Create( ID_CAMERA );
if (!Match( TK_OPEN_PARENTHESIS ))
return Error("syntax error : '(' not found");
if ( GetType( (char *) typeName ) == false )
return false;
type = FindSymbol( typeName, m_typeKeywords);
switch ( type )
{
case TYPE_PAN: //PAN ( ANGLES, DURATION )
block.Write( TK_FLOAT, (float) type );
if ( GetVector( &block ) == false )
return false;
if ( GetVector( &block ) == false )
return false;
if ( GetFloat( &block ) == false )
return false;
break;
case TYPE_ZOOM: //ZOOM ( FOV, DURATION )
block.Write( TK_FLOAT, (float) type );
if ( GetFloat( &block ) == false )
return false;
if ( GetFloat( &block ) == false )
return false;
break;
case TYPE_MOVE: //MOVE ( ORIGIN, DURATION )
block.Write( TK_FLOAT, (float) type );
if ( GetVector( &block ) == false )
return false;
if ( GetFloat( &block ) == false )
return false;
break;
case TYPE_FADE: //FADE ( SOURCE(R,G,B,A), DEST(R,G,B,A), DURATION )
block.Write( TK_FLOAT, (float) type );
//Source color
if ( GetVector( &block ) == false )
return false;
if ( GetFloat( &block ) == false )
return false;
//Dest color
if ( GetVector( &block ) == false )
return false;
if ( GetFloat( &block ) == false )
return false;
//Duration
if ( GetFloat( &block ) == false )
return false;
break;
case TYPE_PATH: //PATH ( FILENAME )
block.Write( TK_FLOAT, (float) type );
//Filename
if ( GetString( &block ) == false )
return false;
break;
case TYPE_ENABLE:
case TYPE_DISABLE:
block.Write( TK_FLOAT, (float) type );
break;
case TYPE_SHAKE: //SHAKE ( INTENSITY, DURATION )
block.Write( TK_FLOAT, (float) type );
//Intensity
if ( GetFloat( &block ) == false )
return false;
//Duration
if ( GetFloat( &block ) == false )
return false;
break;
case TYPE_ROLL: //ROLL ( ANGLE, TIME )
block.Write( TK_FLOAT, (float) type );
//Angle
if ( GetFloat( &block ) == false )
return false;
//Time
if ( GetFloat( &block ) == false )
return false;
break;
case TYPE_TRACK: //TRACK ( TARGETNAME, SPEED, INITLERP )
block.Write( TK_FLOAT, (float) type );
//Target name
if ( GetString( &block ) == false )
return false;
//Speed
if ( GetFloat( &block ) == false )
return false;
//Init lerp
if ( GetFloat( &block ) == false )
return false;
break;
case TYPE_FOLLOW: //FOLLOW ( CAMERAGROUP, SPEED, INITLERP )
block.Write( TK_FLOAT, (float) type );
//Camera group
if ( GetString( &block ) == false )
return false;
//Speed
if ( GetFloat( &block ) == false )
return false;
//Init lerp
if ( GetFloat( &block ) == false )
return false;
break;
case TYPE_DISTANCE: //DISTANCE ( DISTANCE, INITLERP )
block.Write( TK_FLOAT, (float) type );
//Distance
if ( GetFloat( &block ) == false )
return false;
//Init lerp
if ( GetFloat( &block ) == false )
return false;
break;
}
if (!Match( TK_CLOSED_PARENTHESIS ))
return Error("camera : too many parameters");
m_blockStream->WriteBlock( &block );
return true;
}
/*
-------------------------
GetDoWait
-------------------------
*/
int CInterpreter::GetDoWait( void )
{
CBlock block;
//Write out the "do" portion
block.Create( ID_DO );
if (!Match( TK_OPEN_PARENTHESIS ))
return Error("syntax error : '(' not found");
if ( GetString( &block ) == false )
return false;
if (!Match( TK_CLOSED_PARENTHESIS ))
return Error("do : too many parameters");
//Write out the accompanying "wait"
char *str = (char *) block.GetMemberData( 0 );
CBlock block2;
block2.Create( ID_WAIT );
block2.Write( TK_STRING, (char *) str );
m_blockStream->WriteBlock( &block );
m_blockStream->WriteBlock( &block2 );
return true;
}
/*
-------------------------
GetSignal
-------------------------
*/
int CInterpreter::GetSignal( void )
{
CBlock block;
block.Create( ID_SIGNAL );
if (!Match( TK_OPEN_PARENTHESIS ))
return Error("syntax error : '(' not found");
if ( GetString( &block ) == false )
return false;
if (!Match( TK_CLOSED_PARENTHESIS ))
return Error("signal : too many parameters");
m_blockStream->WriteBlock( &block );
return true;
}
/*
-------------------------
GetSignal
-------------------------
*/
int CInterpreter::GetWaitSignal( void )
{
CBlock block;
block.Create( ID_WAITSIGNAL );
if (!Match( TK_OPEN_PARENTHESIS ))
return Error("syntax error : '(' not found");
if ( GetString( &block ) == false )
return false;
if (!Match( TK_CLOSED_PARENTHESIS ))
return Error("waitsignal : too many parameters");
m_blockStream->WriteBlock( &block );
return true;
}
/*
-------------------------
GetPlay
-------------------------
*/
int CInterpreter::GetPlay( void )
{
CBlock block;
block.Create( ID_PLAY );
if (!Match( TK_OPEN_PARENTHESIS ))
return Error("syntax error : '(' not found");
if ( GetString( &block ) == false )
return false;
if ( GetString( &block ) == false )
return false;
if (!Match( TK_CLOSED_PARENTHESIS ))
return Error("waitsignal : too many parameters");
m_blockStream->WriteBlock( &block );
return true;
}
/*
===================================================================================================
GetTag()
Handles the tag() identifier.
===================================================================================================
*/
//NOTENOTE: The tag's information is included as block members, not as a separate block.
int CInterpreter::GetTag( CBlock *block )
{
char typeName[MAX_STRING_SIZE];
int typeID;
//Mark as a tag
block->Write( ID_TAG, (float) ID_TAG );
if (!Match( TK_OPEN_PARENTHESIS ))
return Error("syntax error : '(' not found");
//Get the tag name
if ( GetString( block ) == false )
return false;
//Get the lookup ID
GetType( (char *) typeName );
typeID = FindSymbol( (char *) typeName, m_typeKeywords);
//Tags only contain origin and angles lookups
if ( (typeID != TYPE_ORIGIN) && (typeID != TYPE_ANGLES) )
{
return Error("syntax error : 'tag' : %s is not a valid look up identifier", typeName );
}
block->Write( TK_FLOAT, (float) typeID );
if (!Match( TK_CLOSED_PARENTHESIS ))
return Error("tag : too many parameters");
return true;
}
/*
===================================================================================================
Interpret function
===================================================================================================
*/
// note new return type, this now returns the bad block number, else 0 for success.
//
// I also return -ve block numbers for errors between blocks. Eg if you read 3 good blocks, then find an unexpected
// float in the script between blocks 3 & 4 then I return -3 to indicate the error is after that, but not block 4
//
int CInterpreter::Interpret( CTokenizer *Tokenizer, CBlockStream *BlockStream, char *filename )
{
CBlock block;
CToken *token;
int type, blockLevel = 0, parenthesisLevel = 0;
m_sCurrentFile = filename; // used during error reporting because you can't ask tokenizer for pushed streams
m_tokenizer = Tokenizer;
m_blockStream = BlockStream;
m_iCurrentLine = m_tokenizer->GetCurLine();
token = m_tokenizer->GetToEndOfLine(TK_STRING);
m_sCurrentLine = token->GetStringValue();
m_tokenizer->PutBackToken(token, false, NULL, true);
m_iBadCBlockNumber = 0;
while (m_tokenizer->GetRemainingSize() > 0)
{
token = m_tokenizer->GetToken( TKF_USES_EOL, 0 );
type = token->GetType();
switch ( type )
{
case TK_UNDEFINED:
token->Delete();
m_iBadCBlockNumber = -m_iBadCBlockNumber;
Error("%d : undefined token", type);
return m_iBadCBlockNumber;
break;
case TK_EOF:
break;
case TK_EOL:
// read the next line, then put it back
token->Delete();
m_iCurrentLine = m_tokenizer->GetCurLine();
token = m_tokenizer->GetToEndOfLine(TK_STRING);
m_sCurrentLine = token->GetStringValue();
m_tokenizer->PutBackToken(token, false, NULL, true);
break;
case TK_CHAR:
case TK_STRING:
token->Delete();
m_iBadCBlockNumber = -m_iBadCBlockNumber;
Error("syntax error : unexpected string");
return m_iBadCBlockNumber;
break;
case TK_INT:
token->Delete();
m_iBadCBlockNumber = -m_iBadCBlockNumber;
Error("syntax error : unexpected integer");
return m_iBadCBlockNumber;
break;
case TK_FLOAT:
token->Delete();
m_iBadCBlockNumber = -m_iBadCBlockNumber;
Error("syntax error : unexpected float");
return m_iBadCBlockNumber;
break;
case TK_IDENTIFIER:
m_iBadCBlockNumber++;
if (!GetID( (char *) token->GetStringValue() ))
{
token->Delete();
return m_iBadCBlockNumber;
}
token->Delete();
break;
case TK_BLOCK_START:
token->Delete();
if (parenthesisLevel)
{
m_iBadCBlockNumber = -m_iBadCBlockNumber;
Error("syntax error : brace inside parenthesis");
return m_iBadCBlockNumber;
}
blockLevel++;
break;
case TK_BLOCK_END:
token->Delete();
if (parenthesisLevel)
{
m_iBadCBlockNumber = -m_iBadCBlockNumber;
Error("syntax error : brace inside parenthesis");
return m_iBadCBlockNumber;
}
block.Create( ID_BLOCK_END );
m_blockStream->WriteBlock( &block );
block.Free();
blockLevel--;
break;
case TK_OPEN_PARENTHESIS:
token->Delete();
blockLevel++;
parenthesisLevel++;
break;
case TK_CLOSED_PARENTHESIS:
token->Delete();
blockLevel--;
parenthesisLevel--;
if (parenthesisLevel<0)
{
m_iBadCBlockNumber = -m_iBadCBlockNumber;
Error("syntax error : closed parenthesis with no opening match");
return m_iBadCBlockNumber;
}
break;
case TK_VECTOR_START:
token->Delete();
m_iBadCBlockNumber = -m_iBadCBlockNumber;
Error("syntax error : unexpected vector");
return m_iBadCBlockNumber;
break;
case TK_VECTOR_END:
token->Delete();
m_iBadCBlockNumber = -m_iBadCBlockNumber;
Error("syntax error : unexpected vector");
return m_iBadCBlockNumber;
break;
}
}
if ( blockLevel )
{
m_iBadCBlockNumber = -m_iBadCBlockNumber;
Error("error : open brace was not closed");
return m_iBadCBlockNumber;
}
if ( parenthesisLevel )
{
m_iBadCBlockNumber = -m_iBadCBlockNumber;
Error("error: open parenthesis");
return m_iBadCBlockNumber;
}
//Release all the variable information, because it's already been written out
FreeVars();
m_iBadCBlockNumber = 0;
return m_iBadCBlockNumber; //true;
}
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