Sweden-Number/debugger/dbg.y

%{
/*
 * Parser for command lines in the Wine debugger
 *
 * Copyright 1993 Eric Youngdale
 * Copyright 1995 Morten Welinder
 * Copyright 2000 Eric Pouech
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 2.1 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#include "config.h"

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <unistd.h>

#include "wine/exception.h"
#include "debugger.h"
#include "expr.h"
#include "msvcrt/excpt.h"

static void mode_command(int);
int yylex(void);
int yyerror(char *);

%}

%union
{
    DBG_VALUE        value;
    char *           string;
    int              integer;
    struct list_id   listing;
    struct expr *    expression;
    struct datatype* type;
}

%token tCONT tPASS tSTEP tLIST tNEXT tQUIT tHELP tBACKTRACE tINFO tWALK tUP tDOWN
%token tENABLE tDISABLE tBREAK tWATCH tDELETE tSET tMODE tPRINT tEXAM tABORT tVM86
%token tCLASS tMAPS tMODULE tSTACK tSEGMENTS tREGS tWND tQUEUE tLOCAL
%token tPROCESS tTHREAD tMODREF tEOL tEOF
%token tFRAME tSHARE tCOND tDISPLAY tUNDISPLAY tDISASSEMBLE
%token tSTEPI tNEXTI tFINISH tSHOW tDIR tWHATIS tSOURCE
%token <string> tPATH
%token <string> tIDENTIFIER tSTRING tDEBUGSTR tINTVAR
%token <integer> tNUM tFORMAT
%token tSYMBOLFILE tRUN tATTACH tDETACH tNOPROCESS

%token tCHAR tSHORT tINT tLONG tFLOAT tDOUBLE tUNSIGNED tSIGNED
%token tSTRUCT tUNION tENUM

/* %left ',' */
/* %left '=' OP_OR_EQUAL OP_XOR_EQUAL OP_AND_EQUAL OP_SHL_EQUAL \
         OP_SHR_EQUAL OP_PLUS_EQUAL OP_MINUS_EQUAL \
         OP_TIMES_EQUAL OP_DIVIDE_EQUAL OP_MODULO_EQUAL */
/* %left OP_COND */ /* ... ? ... : ... */
%left OP_LOR
%left OP_LAND
%left '|'
%left '^'
%left '&'
%left OP_EQ OP_NE
%left '<' '>' OP_LE OP_GE
%left OP_SHL OP_SHR
%left '+' '-'
%left '*' '/' '%'
%left OP_SIGN '!' '~' OP_DEREF /* OP_INC OP_DEC OP_ADDR */
%left '.' '[' OP_DRF
%nonassoc ':'

%type <expression> expr lval lvalue
%type <type> type_expr
%type <value> expr_addr lval_addr
%type <integer> expr_value
%type <string> pathname identifier

%type <listing> list_arg

%%

input: line
    | input line
    ;

line: command
    | tEOL
    | tEOF                      { return 1; }
    | error tEOL               	{ yyerrok; }
    ;

command:
      tQUIT tEOL		{ /*DEBUG_Quit();*/ return 1; }
    | tHELP tEOL                { DEBUG_Help(); }
    | tHELP tINFO tEOL          { DEBUG_HelpInfo(); }
    | tPASS tEOL                { DEBUG_WaitNextException(DBG_EXCEPTION_NOT_HANDLED, 0, 0); }
    | tCONT tEOL                { DEBUG_WaitNextException(DBG_CONTINUE, 1,  EXEC_CONT); }
    | tCONT tNUM tEOL         	{ DEBUG_WaitNextException(DBG_CONTINUE, $2, EXEC_CONT); }
    | tSTEP tEOL               	{ DEBUG_WaitNextException(DBG_CONTINUE, 1,  EXEC_STEP_INSTR); }
    | tSTEP tNUM tEOL           { DEBUG_WaitNextException(DBG_CONTINUE, $2, EXEC_STEP_INSTR); }
    | tNEXT tEOL                { DEBUG_WaitNextException(DBG_CONTINUE, 1,  EXEC_STEP_OVER); }
    | tNEXT tNUM tEOL           { DEBUG_WaitNextException(DBG_CONTINUE, $2, EXEC_STEP_OVER); }
    | tSTEPI tEOL               { DEBUG_WaitNextException(DBG_CONTINUE, 1,  EXEC_STEPI_INSTR); }
    | tSTEPI tNUM tEOL          { DEBUG_WaitNextException(DBG_CONTINUE, $2, EXEC_STEPI_INSTR); }
    | tNEXTI tEOL               { DEBUG_WaitNextException(DBG_CONTINUE, 1,  EXEC_STEPI_OVER); }
    | tNEXTI tNUM tEOL          { DEBUG_WaitNextException(DBG_CONTINUE, $2, EXEC_STEPI_OVER); }
    | tFINISH tEOL	       	{ DEBUG_WaitNextException(DBG_CONTINUE, 0,  EXEC_FINISH); }
    | tABORT tEOL              	{ kill(getpid(), SIGABRT); }
    | tMODE tNUM tEOL          	{ mode_command($2); }
    | tMODE tVM86 tEOL         	{ DEBUG_CurrThread->dbg_mode = MODE_VM86; }
    | tENABLE tNUM tEOL        	{ DEBUG_EnableBreakpoint( $2, TRUE ); }
    | tDISABLE tNUM tEOL       	{ DEBUG_EnableBreakpoint( $2, FALSE ); }
    | tDELETE tBREAK tNUM tEOL 	{ DEBUG_DelBreakpoint( $3 ); }
    | tBACKTRACE tEOL	       	{ DEBUG_BackTrace(DEBUG_CurrTid, TRUE); }
    | tBACKTRACE tNUM tEOL     	{ DEBUG_BackTrace($2, TRUE); }
    | tUP tEOL		       	{ DEBUG_SetFrame( curr_frame + 1 );  }
    | tUP tNUM tEOL	       	{ DEBUG_SetFrame( curr_frame + $2 ); }
    | tDOWN tEOL	       	{ DEBUG_SetFrame( curr_frame - 1 );  }
    | tDOWN tNUM tEOL	       	{ DEBUG_SetFrame( curr_frame - $2 ); }
    | tFRAME tNUM tEOL         	{ DEBUG_SetFrame( $2 ); }
    | tSHOW tDIR tEOL	       	{ DEBUG_ShowDir(); }
    | tDIR pathname tEOL       	{ DEBUG_AddPath( $2 ); }
    | tDIR tEOL		       	{ DEBUG_NukePath(); }
    | tDISPLAY tEOL	       	{ DEBUG_InfoDisplay(); }
    | tDISPLAY expr tEOL       	{ DEBUG_AddDisplay($2, 1, 0); }
    | tDISPLAY tFORMAT expr tEOL{ DEBUG_AddDisplay($3, $2 >> 8, $2 & 0xff); }
    | tDELETE tDISPLAY tNUM tEOL{ DEBUG_DelDisplay( $3 ); }
    | tDELETE tDISPLAY tEOL    	{ DEBUG_DelDisplay( -1 ); }
    | tUNDISPLAY tNUM tEOL     	{ DEBUG_DelDisplay( $2 ); }
    | tUNDISPLAY tEOL          	{ DEBUG_DelDisplay( -1 ); }
    | tCOND tNUM tEOL          	{ DEBUG_AddBPCondition($2, NULL); }
    | tCOND tNUM expr tEOL	{ DEBUG_AddBPCondition($2, $3); }
    | tSOURCE pathname tEOL     { DEBUG_Parser($2); }
    | tSYMBOLFILE pathname tEOL	{ DEBUG_ReadSymbolTable($2, 0); }
    | tSYMBOLFILE pathname tNUM tEOL	{ DEBUG_ReadSymbolTable($2, $3); }
    | tWHATIS expr_addr tEOL	{ DEBUG_PrintType(&$2); DEBUG_FreeExprMem(); }
    | tATTACH tNUM tEOL		{ DEBUG_Attach($2, FALSE); }
    | tDETACH tEOL              { return DEBUG_Detach(); /* FIXME: we shouldn't return, but since we cannot simply clean the symbol table, exit debugger for now */ }
    | list_command
    | disassemble_command
    | set_command
    | x_command
    | print_command
    | break_command
    | watch_command
    | info_command
    | walk_command
    | run_command
    | noprocess_state
    ;

set_command:
      tSET lval_addr '=' expr_value tEOL { DEBUG_WriteMemory(&$2, $4); DEBUG_FreeExprMem(); }
    | tSET '+' tIDENTIFIER tEOL {DEBUG_DbgChannel(TRUE, NULL, $3);}
    | tSET '-' tIDENTIFIER tEOL {DEBUG_DbgChannel(FALSE, NULL, $3);}
    | tSET tIDENTIFIER '+' tIDENTIFIER tEOL {DEBUG_DbgChannel(TRUE, $2, $4);}
    | tSET tIDENTIFIER '-' tIDENTIFIER tEOL {DEBUG_DbgChannel(FALSE, $2, $4);}
    ;

pathname:
      tIDENTIFIER              { $$ = $1; }
    | tPATH		       { $$ = $1; }
    ;

disassemble_command:
      tDISASSEMBLE tEOL              { DEBUG_Disassemble( NULL, NULL, 10 ); }
    | tDISASSEMBLE expr_addr tEOL    { DEBUG_Disassemble( & $2, NULL, 10 ); }
    | tDISASSEMBLE expr_addr ',' expr_addr tEOL { DEBUG_Disassemble( & $2, & $4, 0 ); }
    ;

list_command:
      tLIST tEOL               { DEBUG_List( NULL, NULL, 10 ); }
    | tLIST '-' tEOL	       { DEBUG_List( NULL, NULL, -10 ); }
    | tLIST list_arg tEOL      { DEBUG_List( & $2, NULL, 10 ); }
    | tLIST ',' list_arg tEOL  { DEBUG_List( NULL, & $3, -10 ); }
    | tLIST list_arg ',' list_arg tEOL { DEBUG_List( & $2, & $4, 0 ); }
    ;

list_arg:
      tNUM		       { $$.sourcefile = NULL; $$.line = $1; }
    | pathname ':' tNUM	       { $$.sourcefile = $1; $$.line = $3; }
    | tIDENTIFIER	       { DEBUG_GetFuncInfo( & $$, NULL, $1); }
    | pathname ':' tIDENTIFIER { DEBUG_GetFuncInfo( & $$, $1, $3); }
    | '*' expr_addr	       { DEBUG_FindNearestSymbol( & $2.addr, FALSE, NULL, 0, & $$ );
                                 DEBUG_FreeExprMem(); }
    ;

x_command:
      tEXAM expr_addr tEOL     { DEBUG_ExamineMemory( &$2, 1, 'x'); DEBUG_FreeExprMem(); }
    | tEXAM tFORMAT expr_addr tEOL  { DEBUG_ExamineMemory( &$3, $2>>8, $2&0xff );
 				      DEBUG_FreeExprMem(); }
    ;

print_command:
      tPRINT expr_addr tEOL    { DEBUG_Print( &$2, 1, 0, 0 ); DEBUG_FreeExprMem(); }
    | tPRINT tFORMAT expr_addr tEOL { DEBUG_Print( &$3, $2 >> 8, $2 & 0xff, 0 );
 				      DEBUG_FreeExprMem(); }
    ;

break_command:
      tBREAK '*' expr_addr tEOL{ DEBUG_AddBreakpointFromValue( &$3 ); DEBUG_FreeExprMem(); }
    | tBREAK identifier tEOL   { DEBUG_AddBreakpointFromId($2, -1); }
    | tBREAK identifier ':' tNUM tEOL  { DEBUG_AddBreakpointFromId($2, $4); }
    | tBREAK tNUM tEOL	       { DEBUG_AddBreakpointFromLineno($2); }
    | tBREAK tEOL              { DEBUG_AddBreakpointFromLineno(-1); }
    ;

watch_command:
      tWATCH '*' expr_addr tEOL { DEBUG_AddWatchpoint( &$3, 1 ); DEBUG_FreeExprMem(); }
    | tWATCH identifier tEOL    { DEBUG_AddWatchpointFromId($2); }
    ;

info_command:
      tINFO tBREAK tEOL         { DEBUG_InfoBreakpoints(); }
    | tINFO tCLASS tSTRING tEOL	{ DEBUG_InfoClass( $3 ); }
    | tINFO tSHARE tEOL		{ DEBUG_InfoShare(); }
    | tINFO tMODULE expr_value tEOL   { DEBUG_DumpModule( $3 ); DEBUG_FreeExprMem(); }
    | tINFO tQUEUE expr_value tEOL    { DEBUG_DumpQueue( $3 ); DEBUG_FreeExprMem(); }
    | tINFO tREGS tEOL          { DEBUG_InfoRegisters(); }
    | tINFO tSEGMENTS expr_value tEOL { DEBUG_InfoSegments( $3, 1 ); DEBUG_FreeExprMem(); }
    | tINFO tSEGMENTS tEOL      { DEBUG_InfoSegments( 0, -1 ); }
    | tINFO tSTACK tEOL         { DEBUG_InfoStack(); }
    | tINFO tMAPS tEOL          { DEBUG_InfoVirtual(); }
    | tINFO tWND expr_value tEOL{ DEBUG_InfoWindow( (HWND)$3 ); DEBUG_FreeExprMem(); }
    | tINFO tLOCAL tEOL         { DEBUG_InfoLocals(); }
    | tINFO tDISPLAY tEOL       { DEBUG_InfoDisplay(); }
    ;

walk_command:
      tWALK tCLASS tEOL         { DEBUG_WalkClasses(); }
    | tWALK tMODULE tEOL        { DEBUG_WalkModules(); }
    | tWALK tQUEUE tEOL         { DEBUG_WalkQueues(); }
    | tWALK tWND tEOL           { DEBUG_WalkWindows( 0, 0 ); }
    | tWALK tWND tNUM tEOL      { DEBUG_WalkWindows( (HWND)$3, 0 ); }
    | tWALK tPROCESS tEOL       { DEBUG_WalkProcess(); }
    | tWALK tTHREAD tEOL        { DEBUG_WalkThreads(); }
    | tWALK tMODREF expr_value tEOL   { DEBUG_WalkModref( $3 ); DEBUG_FreeExprMem(); }
    ;

run_command:
      tRUN tEOL                 { DEBUG_Run(NULL); }
    | tRUN tSTRING tEOL         { DEBUG_Run($2); }
    ;

noprocess_state:
      tNOPROCESS tEOL		{} /* <CR> shall not barf anything */
    | tNOPROCESS tSTRING tEOL	{ DEBUG_Printf(DBG_CHN_MESG, "No process loaded, cannot execute '%s'\n", $2); }
    ;

type_expr:
      type_expr '*'		{ $$ = $1 ? DEBUG_FindOrMakePointerType($1) : NULL; }
    | tINT			{ $$ = DEBUG_GetBasicType(DT_BASIC_INT); }
    | tCHAR			{ $$ = DEBUG_GetBasicType(DT_BASIC_CHAR); }
    | tLONG tINT		{ $$ = DEBUG_GetBasicType(DT_BASIC_LONGINT); }
    | tUNSIGNED tINT		{ $$ = DEBUG_GetBasicType(DT_BASIC_UINT); }
    | tLONG tUNSIGNED tINT	{ $$ = DEBUG_GetBasicType(DT_BASIC_ULONGINT); }
    | tLONG tLONG tINT		{ $$ = DEBUG_GetBasicType(DT_BASIC_LONGLONGINT); }
    | tLONG tLONG tUNSIGNED tINT{ $$ = DEBUG_GetBasicType(DT_BASIC_ULONGLONGINT); }
    | tSHORT tINT		{ $$ = DEBUG_GetBasicType(DT_BASIC_SHORTINT); }
    | tSHORT tUNSIGNED tINT	{ $$ = DEBUG_GetBasicType(DT_BASIC_USHORTINT); }
    | tSIGNED tCHAR		{ $$ = DEBUG_GetBasicType(DT_BASIC_SCHAR); }
    | tUNSIGNED tCHAR		{ $$ = DEBUG_GetBasicType(DT_BASIC_UCHAR); }
    | tFLOAT			{ $$ = DEBUG_GetBasicType(DT_BASIC_FLOAT); }
    | tDOUBLE			{ $$ = DEBUG_GetBasicType(DT_BASIC_DOUBLE); }
    | tLONG tDOUBLE		{ $$ = DEBUG_GetBasicType(DT_BASIC_LONGDOUBLE); }
    | tSTRUCT tIDENTIFIER	{ $$ = DEBUG_TypeCast(DT_STRUCT, $2); }
    | tUNION tIDENTIFIER	{ $$ = DEBUG_TypeCast(DT_STRUCT, $2); }
    | tENUM tIDENTIFIER		{ $$ = DEBUG_TypeCast(DT_ENUM, $2); }
    ;

expr_addr: expr                 { $$ = DEBUG_EvalExpr($1); }
    ;

expr_value: expr                { DBG_VALUE value = DEBUG_EvalExpr($1);
                                  /* expr_value is typed as an integer */
                                  $$ = DEBUG_ReadMemory(&value); }
    ;

/*
 * The expr rule builds an expression tree.  When we are done, we call
 * EvalExpr to evaluate the value of the expression.  The advantage of
 * the two-step approach is that it is possible to save expressions for
 * use in 'display' commands, and in conditional watchpoints.
 */
expr:
      tNUM                       { $$ = DEBUG_ConstExpr($1); }
    | tSTRING			 { $$ = DEBUG_StringExpr($1); }
    | tINTVAR                    { $$ = DEBUG_IntVarExpr($1); }
    | tIDENTIFIER		 { $$ = DEBUG_SymbolExpr($1); }
    | expr OP_DRF tIDENTIFIER	 { $$ = DEBUG_StructPExpr($1, $3); }
    | expr '.' tIDENTIFIER	 { $$ = DEBUG_StructExpr($1, $3); }
    | tIDENTIFIER '(' ')'	 { $$ = DEBUG_CallExpr($1, 0); }
    | tIDENTIFIER '(' expr ')'	 { $$ = DEBUG_CallExpr($1, 1, $3); }
    | tIDENTIFIER '(' expr ',' expr ')'	 { $$ = DEBUG_CallExpr($1, 2, $3, $5); }
    | tIDENTIFIER '(' expr ',' expr ',' expr ')'	 { $$ = DEBUG_CallExpr($1, 3, $3, $5, $7); }
    | tIDENTIFIER '(' expr ',' expr ',' expr ',' expr ')'	 { $$ = DEBUG_CallExpr($1, 4, $3, $5, $7, $9); }
    | tIDENTIFIER '(' expr ',' expr ',' expr ',' expr ',' expr ')'	 { $$ = DEBUG_CallExpr($1, 5, $3, $5, $7, $9, $11); }
    | expr '[' expr ']'		 { $$ = DEBUG_BinopExpr(EXP_OP_ARR, $1, $3); }
    | expr ':' expr		 { $$ = DEBUG_BinopExpr(EXP_OP_SEG, $1, $3); }
    | expr OP_LOR expr           { $$ = DEBUG_BinopExpr(EXP_OP_LOR, $1, $3); }
    | expr OP_LAND expr          { $$ = DEBUG_BinopExpr(EXP_OP_LAND, $1, $3); }
    | expr '|' expr              { $$ = DEBUG_BinopExpr(EXP_OP_OR, $1, $3); }
    | expr '&' expr              { $$ = DEBUG_BinopExpr(EXP_OP_AND, $1, $3); }
    | expr '^' expr              { $$ = DEBUG_BinopExpr(EXP_OP_XOR, $1, $3); }
    | expr OP_EQ expr            { $$ = DEBUG_BinopExpr(EXP_OP_EQ, $1, $3); }
    | expr '>' expr              { $$ = DEBUG_BinopExpr(EXP_OP_GT, $1, $3); }
    | expr '<' expr              { $$ = DEBUG_BinopExpr(EXP_OP_LT, $1, $3); }
    | expr OP_GE expr            { $$ = DEBUG_BinopExpr(EXP_OP_GE, $1, $3); }
    | expr OP_LE expr            { $$ = DEBUG_BinopExpr(EXP_OP_LE, $1, $3); }
    | expr OP_NE expr            { $$ = DEBUG_BinopExpr(EXP_OP_NE, $1, $3); }
    | expr OP_SHL expr           { $$ = DEBUG_BinopExpr(EXP_OP_SHL, $1, $3); }
    | expr OP_SHR expr           { $$ = DEBUG_BinopExpr(EXP_OP_SHR, $1, $3); }
    | expr '+' expr              { $$ = DEBUG_BinopExpr(EXP_OP_ADD, $1, $3); }
    | expr '-' expr              { $$ = DEBUG_BinopExpr(EXP_OP_SUB, $1, $3); }
    | expr '*' expr              { $$ = DEBUG_BinopExpr(EXP_OP_MUL, $1, $3); }
    | expr '/' expr              { $$ = DEBUG_BinopExpr(EXP_OP_DIV, $1, $3); }
    | expr '%' expr              { $$ = DEBUG_BinopExpr(EXP_OP_REM, $1, $3); }
    | '-' expr %prec OP_SIGN     { $$ = DEBUG_UnopExpr(EXP_OP_NEG, $2); }
    | '+' expr %prec OP_SIGN     { $$ = $2; }
    | '!' expr                   { $$ = DEBUG_UnopExpr(EXP_OP_NOT, $2); }
    | '~' expr                   { $$ = DEBUG_UnopExpr(EXP_OP_LNOT, $2); }
    | '(' expr ')'               { $$ = $2; }
    | '*' expr %prec OP_DEREF    { $$ = DEBUG_UnopExpr(EXP_OP_DEREF, $2); }
    | '&' expr %prec OP_DEREF    { $$ = DEBUG_UnopExpr(EXP_OP_ADDR, $2); }
    | '(' type_expr ')' expr %prec OP_DEREF { $$ = DEBUG_TypeCastExpr($2, $4); }
    ;

/*
 * The lvalue rule builds an expression tree.  This is a limited form
 * of expression that is suitable to be used as an lvalue.
 */
lval_addr: lval                  { $$ = DEBUG_EvalExpr($1); }
    ;

lval: lvalue                     { $$ = $1; }
    | '*' expr			 { $$ = DEBUG_UnopExpr(EXP_OP_FORCE_DEREF, $2); }
    ;

lvalue: tNUM                     { $$ = DEBUG_ConstExpr($1); }
    | tINTVAR                    { $$ = DEBUG_IntVarExpr($1); }
    | tIDENTIFIER		 { $$ = DEBUG_SymbolExpr($1); }
    | lvalue OP_DRF tIDENTIFIER	 { $$ = DEBUG_StructPExpr($1, $3); }
    | lvalue '.' tIDENTIFIER	 { $$ = DEBUG_StructExpr($1, $3); }
    | lvalue '[' expr ']'	 { $$ = DEBUG_BinopExpr(EXP_OP_ARR, $1, $3); }
    ;

identifier: tIDENTIFIER          { $$ = $1; }
    | identifier '.' tIDENTIFIER { char* ptr = DBG_alloc(strlen($1) + 1 + strlen($3)+ 1);
                                   sprintf(ptr, "%s.%s", $1, $3); $$ = DEBUG_MakeSymbol(ptr);
                                   DBG_free(ptr); }
    | identifier ':' ':' tIDENTIFIER { char* ptr = DBG_alloc(strlen($1) + 2 + strlen($4) + 1);
                                   sprintf(ptr, "%s::%s", $1, $4); $$ = DEBUG_MakeSymbol(ptr);
                                   DBG_free(ptr); }
    ;

%%

static void mode_command(int newmode)
{
    switch(newmode)
    {
    case 16: DEBUG_CurrThread->dbg_mode = MODE_16; break;
    case 32: DEBUG_CurrThread->dbg_mode = MODE_32; break;
    default: DEBUG_Printf(DBG_CHN_MESG,"Invalid mode (use 16, 32 or vm86)\n");
    }
}

void DEBUG_Exit(DWORD ec)
{
   ExitProcess(ec);
}

static WINE_EXCEPTION_FILTER(wine_dbg_cmd)
{
   DEBUG_Printf(DBG_CHN_MESG, "\nwine_dbg_cmd: ");
   switch (GetExceptionCode()) {
   case DEBUG_STATUS_INTERNAL_ERROR:
      DEBUG_Printf(DBG_CHN_MESG, "WineDbg internal error\n");
      break;
   case DEBUG_STATUS_NO_SYMBOL:
      DEBUG_Printf(DBG_CHN_MESG, "Undefined symbol\n");
      break;
   case DEBUG_STATUS_DIV_BY_ZERO:
      DEBUG_Printf(DBG_CHN_MESG, "Division by zero\n");
      break;
   case DEBUG_STATUS_BAD_TYPE:
      DEBUG_Printf(DBG_CHN_MESG, "No type or type mismatch\n");
      break;
   case DEBUG_STATUS_NO_FIELD:
      DEBUG_Printf(DBG_CHN_MESG, "No such field in structure or union\n");
      break;
   default:
      DEBUG_Printf(DBG_CHN_MESG, "Exception %lx\n", GetExceptionCode());
      DEBUG_ExternalDebugger();
      break;
   }

   return EXCEPTION_EXECUTE_HANDLER;
}

static  void set_default_channels(void)
{
    DEBUG_hParserOutput = GetStdHandle(STD_OUTPUT_HANDLE);
    DEBUG_hParserInput  = GetStdHandle(STD_INPUT_HANDLE);
}

/***********************************************************************
 *           DEBUG_Parser
 *
 * Debugger editline parser
 */
void	DEBUG_Parser(LPCSTR filename)
{
    BOOL 	        ret_ok;
#ifdef YYDEBUG
    yydebug = 0;
#endif

    ret_ok = FALSE;

    if (filename)
    {
        DEBUG_hParserOutput = 0;
        DEBUG_hParserInput  = CreateFile(filename, GENERIC_READ, FILE_SHARE_READ, NULL, OPEN_EXISTING, 0L, 0);
        if (DEBUG_hParserInput == INVALID_HANDLE_VALUE)
        {
            set_default_channels();
            return;
        }
    }
    else
        set_default_channels();

    do
    {
       __TRY
           {
	  ret_ok = TRUE;
	  yyparse();
       }
       __EXCEPT(wine_dbg_cmd)
       {
	  ret_ok = FALSE;
       }
       __ENDTRY;
       DEBUG_FlushSymbols();
    } while (!ret_ok);

    if (filename)
        CloseHandle(DEBUG_hParserInput);
    set_default_channels();
}

int yyerror(char* s)
{
   DEBUG_Printf(DBG_CHN_MESG, "%s\n", s);
   return 0;
}