%{
/*
 * Copyright 2001 Silicon Graphics, Inc. All rights reserved.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 */
%}

%{
#include <string.h>

#ifdef linux
#define YY_INPUT(buf,result,max_size) \
{ \
    int c = eppic_input(); \
    result = (c == EOF) ? YY_NULL : (buf[0] = c, 1); \
}
#endif

#define yylval eppiclval
#include    "eppic.h"
#define YY_NO_UNPUT
#include    "eppic.tab.h"

#define retok(t) return(t)
int needvar=0, instruct=0;
node_t *lastv;
static char *lastvar=0;
char *eppic_lastvar(void) { return lastvar; }
void eppic_skip_directive(void);
void eppic_define(void);
void eppic_include(void);
void eppic_undefine(void);
char eppic_newchar(void);
int  eppic_chkmacvar(char *);
void *eppic_getmac(char *, int );
%}

ABC     [a-zA-Z_]
ABCN        [a-zA-Z0-9_]
N       [0-9]
X       [0-9a-fA-F]
W       [ \t\n]
P       #[ \t]*
OP              [(]
CP              [)]

%s var1
%s var2
%s var3
%s var4
%%

{W}     { ; }

"..."       { retok(VARARGS); }
"&&"        { retok(BAND); }
"||"        { retok(BOR); }
"<"         { retok(LT); }
"<="        { retok(LE); }
"=="        { retok(EQ); }
">="        { retok(GE); }
">"         { retok(GT); }
"!="        { retok(NE); }

"&="        { retok(ANDME); }
"|"         { retok(OR); }
"|="        { retok(ORME); }
"!"         { retok(NOT); }
"^"         { retok(XOR); }
"&"         { retok(AND); }
"^="        { retok(XORME); }
">>"        { retok(SHR); }
"<<="       { retok(SHLME); }
">>="       { retok(SHRME); }
"<<"        { retok(SHL); }
"++"        { retok(INCR); }
"+"         { retok(ADD); }
"--"        { retok(DECR); }
"-"         { retok(SUB); }
"+="        { retok(ADDME); }
"-="        { retok(SUBME); }
"*="        { retok(MULME); }
"/="        { retok(DIVME); }
"/"         { retok(DIV); }
"%="        { retok(MODME); }
"%"         { retok(MOD); }
"="         { retok(ASSIGN); }
"->"        { retok(INDIRECT); }
"."         { retok(DIRECT); }
"{"         { needvar=0; retok('{'); }

\*     { 
            yylval.i=strlen(yytext); 
            return PTR; 
        }

(("0x"+){X}+[uUlL]*|{N}+[uUlL]*)    { yylval.n = eppic_newnum(yytext); retok(NUMBER); }

{P}ident        {  eppic_skip_directive(); }
{P}pragma       {  eppic_skip_directive(); }
{P}define       {
            /* preprocessor command */
            /* either a simple constant or a macro */
            eppic_define();
        }
{P}include  {

            /* file inclusion */
            eppic_include();
        }
{P}undef        {
            eppic_undefine();
        }
while       { retok(WHILE); }
for         { retok(FOR); }
do          { retok(DO); }
if          { retok(IF); }
else        { retok(ELSE); }
break       { retok(BREAK); }
continue    { retok(CONTINUE); }
in          { retok(IN); }
return      { retok(RETURN); }

__char__    { retok(yylval.i=CHAR); }
__short__   { retok(yylval.i=SHORT); }
__int__     { retok(yylval.i=INT); }
__float__   { retok(yylval.i=FLOAT); }
__double__  { retok(yylval.i=DOUBLE); }
__register__    { retok(yylval.i=REGISTER); }
__volatile__    { retok(yylval.i=VOLATILE); }
__void__    { retok(yylval.i=VOID); }
__unsigned__    { retok(yylval.i=UNSIGNED); }
__signed__  { retok(yylval.i=SIGNED); }
__long__    { retok(yylval.i=LONG); }
__const__   { retok(yylval.i=CONST); }
__static__  { retok(yylval.i=STATIC); }
__extern__  { retok(yylval.i=EXTERN); }

char        { retok(yylval.i=CHAR); }
short       { retok(yylval.i=SHORT); }
int         { retok(yylval.i=INT); }
float       { retok(yylval.i=FLOAT); }
double      { retok(yylval.i=DOUBLE); }
register    { retok(yylval.i=REGISTER); }
volatile    { retok(yylval.i=VOLATILE); }
void        { retok(yylval.i=VOID); }
unsigned    { retok(yylval.i=UNSIGNED); }
signed      { retok(yylval.i=SIGNED); }
long        { retok(yylval.i=LONG); }
const       { retok(yylval.i=CONST); }
static      { retok(yylval.i=STATIC); }
extern      { retok(yylval.i=EXTERN); }

string      { retok(yylval.i=STRTYPE); }
__inline    { ; }
inline      { ; }
switch      { retok(SWITCH); }
case        { retok(CASE); }
default     { retok(DEFAULT); }
enum        { retok(yylval.i=ENUM); }
union       { retok(yylval.i=UNION);}
struct      { retok(yylval.i=STRUCT); }
typedef     { retok(yylval.i=TDEF); }
sizeof      { retok(SIZEOF); }
typeof      { retok(TYPEOF); }
print       { retok(PRINT); }
printo      { retok(PRINTO); }
printd      { retok(PRINTD); }
printx      { retok(PRINTX); }
take_array  { retok(TAKE_ARR); }

__var__              { BEGIN(var1); }
<var1>{W}*{OP}{W}*   { BEGIN(var2); }
<var2>{ABC}{ABCN}*   { BEGIN(var3); goto forcevar; }
<var3>{W}*{CP}{W}*   { BEGIN(INITIAL); }


{ABC}{ABCN}*    { 
                if(eppicdebug) printf("\n**[%s]\n", yytext);
                if((!needvar) && !eppic_getmac(yytext, 0) && (yylval.t=eppic_getctype(V_TYPEDEF, yytext, 1)))
                { 
                    /* hack to remember last tdef name */
                    if(lastvar) eppic_free(lastvar);
                    lastvar=eppic_alloc(strlen(yytext)+1);
                    strcpy(lastvar, yytext);
                    needvar++;
                    if(eppicdebug) printf("\n**[%s] is a typedef\n", yytext);
                    retok(TYPEDEF);
                }
forcevar:
                needvar=0;
                if(strlen(yytext) > MAX_SYMNAMELEN) {

                    eppic_error("Symbol name too long");
                }
                if(!eppic_chkmacvar(yytext)) {
                    yylval.n = eppic_newvnode(yytext); 
                    retok(VAR);
                }
                else if(eppicdebug) printf("\n**[%s] is a mac var\n", yytext);
        }

\"      { yylval.n = eppic_newstr(); retok(STRING); }
\'.\'       { yylval.n = eppic_makenum(B_SC, yytext[1]); retok(NUMBER); }
\'\\.\'     { yylval.n = eppic_makenum(B_SC, eppic_getseq(yytext[2])); retok(NUMBER); }

.       { retok(yylval.i = yytext[0]); }

%%
#undef input
#undef unput
#define input()       eppic_input()
#define unput(c)      eppic_unput(c)
