input.y

实时操作系统RT LINUX的源代码

%{
/* Parser input for the graphical interface. 
   This file is created by the simulator and red by the 
   front_end grap_tool (can be a Xwindows or PostScript ).
   */


#include <stdio.h>
#include <string.h>
#include "crono.h"


extern int   NPoints;
extern int   TimeSim;
extern int   NTasks;
extern int   NResources;


extern Accion        Chronog[MAX_MATRIX];
extern char          Tasks[MAX_TASKS][20];
extern char          Resources[MAX_TASKS][20];

static void cal_tsim(int,int);

extern FILE   *yyin;   /* File used by lex to read the file */

int linenumber=1;
%}

%union {
  long  ivalue;
  char  *cvalue;
}

%token <ivalue> ACTI EXEC END ENDHEAD NUM TASK RESOURCE 
%token <cvalue> IDEN
%start inicio
%type <ivalue>  inicio header body line_body line_head 
%%


inicio : header ENDHEAD body  {}  ; 

body :  body line_body {}
	|  {}
	;


line_body :ACTI NUM NUM NUM 
	   { 
	        if ($2 > NTasks) {
		  yyerror("Task Not declared");
		}
		Chronog[NPoints].accion = ACTI;
                Chronog[NPoints].id = $2;
		Chronog[NPoints].x1 = $3;
		Chronog[NPoints].x2 = $4;
		cal_tsim($4,$3);
		NPoints++;
 	   }
 	| END NUM NUM
	   { 
	        if ($2 > NTasks) {
		  yyerror("Task Not declared");
		}
		Chronog[NPoints].accion = END;
		Chronog[NPoints].id = $2;
		Chronog[NPoints].x1 = $3;
		cal_tsim($3,0);
		NPoints++;
	   }
	| EXEC NUM NUM NUM 
	   {
	        if ($2 > NTasks) { 
		  yyerror("Task Not declared");
		}
		Chronog[NPoints].accion = EXEC;
		Chronog[NPoints].id = $2;
		Chronog[NPoints].x1 = $3;
		Chronog[NPoints].x2 = $4;
		cal_tsim($3,$4);
		NPoints++;
	}
	;

header : header line_head {}
	|  {}
	;



line_head: TASK NUM IDEN
		{
		  if ($2>=MAX_TASKS){
			printf ("\nToo many tasks, graphic tool overflow.\n");
			printf ("Maximun number of tasks %d",MAX_TASKS);
			exit(1);
		  }
		  if ($2>NTasks){
		    NTasks = $2;
		  }
		  strncpy((char*)&Tasks[$2],$3,20);
		}
	| RESOURCE NUM IDEN 
		{
		   if ($2>=MAX_RESOURCES){
			printf ("\nToo many resources, graphic tool overflow.\n");
			printf ("Maximun number of resources %d",MAX_RESOURCES);
			exit(1);
		   }
		   if ($2>NResources){
		     NResources = $2;
		   }
		   strncpy((char*)&Resources[$2],$3,20);
		}
	| {}
	;

%%

static void cal_tsim(a,b){
  if (a<b)
    a=b;
  
  if (a>TimeSim)
    TimeSim=a;
}

yyerror(s)
   char *s;
{
  printf("\nERROR Line %d -->  %s\n",linenumber, s);
  exit();
}

void   Fill_Matrix(char *name){
  int  x;


  if (strlen(name) != 0){
    yyin = fopen (name, "r");
  }
    

  for (x=0; x<MAX_RESOURCES; x++)
    Resources[x][0]=0x0;
  for (x=0; x<MAX_TASKS; x++)
    Tasks[x][0]=0x0;

  NPoints=TimeSim=NTasks=NResources= 0;

  yyparse();
  
  if (strlen(name) != 0){
    fclose(yyin);
  }

}