%{
#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#ifdef __cplusplus
extern "C" {
int yylex(void);
}
#endif

#include "igdbg.yacc.h"

#undef YY_INPUT
#define YY_INPUT(b,r,ms) (r = my_yyinput(b,ms))
    
#define min(a,b) ((a)>(b)?b:a)

extern YYSTYPE yylval;
    
extern char *cmd_buf,*cmd_ptr,*cmd_end;

static int my_yyinput(char *buf, int max_size);

%}
   
%%

[\t ] ; /* ignore whitespace */
\n ; /* ignore enter */

exit |
quit |
help |
verbose |
dumppci |
pipe |
plane |
port |
fifo |
overlay |
onscreen |
fence |
stolen { yylval.string=strdup(yytext); return CMDHDR0;  }
    
regread |
irq |
estatus |
cstatus |
dumppgtt  |
dumpstat |
inl {  yylval.string=strdup(yytext); return CMDHDR1; }

kkflip   |
regwrite |
dumpcmd  |
dumpgtt  |
dumpfb   |
dumpfbl  |
msgread  {  yylval.string=strdup(yytext); return CMDHDR2; }

fillfb  |
fillfbl  |
dumpring  |
msgwrite {  yylval.string=strdup(yytext); return CMDHDR3; }

pciread { yylval.string=strdup(yytext); return CMDHDR4; }
pciwrite { yylval.string=strdup(yytext); return CMDHDR5; }

[A-Za-z_][A-Za-z0-9_\.]* |
\.[A-Za-z_0-9][A-Za-z0-9_\.]* { yylval.string=strdup(yytext); return FILENAME; }

([0-9]+)|(0x[a-fA-F0-9]+) { yylval.expr = strtoul(yytext,NULL,0);return NUMBER;}

\<\<  return LSHIFT; 
\>\>  return RSHIFT; 

.   return *yytext;

%%


static int my_yyinput(char *buf, int max_size)
{
    int n = min(max_size, cmd_end - cmd_ptr);
    if (n>0) {
        memcpy(buf,cmd_ptr,n);
        cmd_ptr += n;
    }
    return n;
}