static void start_expr( void )
{
void *stack[ PARSE_STACK_SIZE ];
ScanExpr( &ParseTokens );
SSLWalk( ParseTable, 0, stack, PARSE_STACK_SIZE );
ExprResolve( ExprSP );
ScanExpr( NULL );
}
bool SubStrung( void ) {
//===================
// Determine whether name is substrung or not.
itnode *save_citnode;
OPR opr;
save_citnode = CITNode;
CITNode = CITNode->link;
ScanExpr();
opr = CITNode->opr;
CITNode = save_citnode;
return( opr == OPR_COL );
}
void EatExpr(void) {
//=================
// Scan ahead, get an expression, and send it to expression handler.
OPR opr;
itnode *cit;
cit = CITNode;
BkLink = CITNode;
AdvanceITPtr();
ScanExpr(); // scan ahead to end of expr
opr = CITNode->opr; // remembers operator at end
CITNode->opr = OPR_TRM; // marks end of expr
CITNode = cit; // back to start of expr
CITNode->opr = OPR_TRM; // marks start of expr
Arith();
CITNode->link->opr = opr; // restores operator at end
}
void Error( dbg_err_flags flg, char *fmt, ... )
{
char buff[TXT_LEN];
va_list args;
char *ptr;
invokes *inv;
input_stack *inp;
char *where;
bool cmderror;
va_start( args, fmt );
ptr = buff;
if( flg & ERR_INTERNAL ) {
ptr = StrCopy( LIT_ENG( Internal_Error ), ptr );
}
ptr = FmtStr( ptr, fmt, args );
ptr = StrCopy( ".", ptr );
if( flg & ERR_LOC ) {
ptr = StrCopy( "\n ", ptr );
switch( CurrToken ) {
case T_CMD_SEPARATOR:
ptr = StrCopy( LIT_ENG( ERR_NEAR_END_OF_COMMAND ), ptr );
break;
case T_LINE_SEPARATOR:
ptr = StrCopy( LIT_ENG( ERR_NEAR_END_OF_LINE ), ptr );
break;
default:
if( ScanLen() == 0 ) Scan();
ptr = Format( ptr, LIT_ENG( ERR_NEAR_TOKEN ), ScanPos(), ScanLen() );
break;
}
}
SetProgStartHook( TRUE );
UnFreezeRegs();
ScanExpr( NULL );
ExprPurge();
PurgeSymHandles(); /* must be done after ExprPurge */
DIPCancel();
ScanSavePtr = 0; /* clean up previous ScanSave locations */
if( _IsOff( SW_ERROR_PRESERVES_RADIX ) ) {
RestoreRadix();
}
_SwitchOff( SW_CALL_FATAL );
if( _IsOn( SW_ERROR_STARTUP ) ) {
StartupErr( buff );
}
if( _IsOn( SW_ERR_IN_TXTBUFF ) ) {
PurgeInpStack();
StrCopy( buff, TxtBuff );
DUIArrowCursor();
Suicide();
}
if( (flg & ERR_SILENT) == 0 ) {
where = LIT_ENG( ERR_EXECUTING_AT );
for( inp = InpStack; inp != NULL; inp = inp->link ) {
if( inp->type & INP_CMD_FILE ) {
inv = inp->handle;
ptr = StrCopy( "\n ", ptr );
ptr = Format( ptr, where, inv->line, inv->name );
where = LIT_ENG( ERR_CALLED_FROM );
}
}
DUIFlushKeys();
DUIWndDebug();
RingBell();
DUIErrorBox( buff );
}
cmderror = FALSE;
for( inp = InpStack; inp != NULL; inp = inp->link ) {
if( inp->type & INP_BREAK_POINT ) {
BrkCmdError();
}
if( inp->type & INP_CAPTURED ) {
CaptureError();
}
if( inp->type & INP_DLG_CMD ) {
cmderror = TRUE;
}
}
PurgeInpStack();
if( cmderror && fmt != LIT_ENG( ERR_DBG_INTERRUPT ) ) {
DlgCmd();
ProcInput();
}
if( _IsOn( SW_ERROR_RETURNS ) ) return;
DUIArrowCursor();
Suicide();
}
void SetTokens( bool parse_tokens )
{
if( parse_tokens ) ScanExpr( &ParseTokens );
else ScanExpr( NULL );
}
