usr/src/usr.bin/awk/bi_vars.c


/********************************************
bi_vars.c
copyright 1991, Michael D. Brennan

This is a source file for mawk, an implementation of
the AWK programming language.

Mawk is distributed without warranty under the terms of
the GNU General Public License, version 2, 1991.
********************************************/

/* $Log:        bi_vars.c,v $
 * Revision 5.1  91/12/05  07:55:38  brennan
 * 1.1 pre-release
 *
*/


/* bi_vars.c */

#include "mawk.h"
#include "symtype.h"
#include "bi_vars.h"
#include "field.h"
#include "init.h"
#include "memory.h"

/* the builtin variables */
CELL  bi_vars[NUM_BI_VAR] ;

/* the order here must match the order in bi_vars.h */

static char *bi_var_names[NUM_BI_VAR] = {
"NR" ,
"FNR" ,
"ARGC" ,
"FILENAME" ,
"OFS" ,
"ORS" ,
"RLENGTH" ,
"RSTART" ,
"SUBSEP"
#if MSDOS  && NO_BINMODE==0
, "BINMODE"
#endif
} ;

/* insert the builtin vars in the hash table */

void  bi_vars_init()
{ register int i ;
  register SYMTAB *s ;


  for ( i = 0 ; i < NUM_BI_VAR ; i++ )
  { s = insert( bi_var_names[i] ) ;
    s->type = i <= 1 ? ST_NR : ST_VAR ;
    s->stval.cp = bi_vars + i ;
    /* bi_vars[i].type = 0 which is C_NOINIT */
  }

  s = insert("ENVIRON") ;
  s->type = ST_ENV ;

  /* set defaults */

  FILENAME->type = C_STRING ;
  FILENAME->ptr = (PTR) new_STRING( "" ) ;

  OFS->type = C_STRING ;
  OFS->ptr = (PTR) new_STRING( " " ) ;

  ORS->type = C_STRING ;
  ORS->ptr = (PTR) new_STRING( "\n" ) ;

  SUBSEP->type = C_STRING ;
  SUBSEP->ptr =  (PTR) new_STRING( "\034" ) ;

  NR->type = FNR->type = C_DOUBLE ;
  /* dval is already 0.0 */

#if  MSDOS  && NO_BINMODE==0
  BINMODE->type = C_DOUBLE ;
#endif
}