/* $Id: filter.c,v 1.2 1996/09/17 04:54:40 connolly Exp $ */

#include <stdio.h>
#include <string.h>
#include <assert.h>

#include "sgml_lex.h"


/*
 * This is a the trivial SGML_LexFunc.
 */

static void
transparent(void *rock,
	    SGML_Lexer *l,
	    int qty,
	    SGML_TokType *types, SGML_String *strings, size_t *lengths)
{
  int i;

  for(i = 0; i < qty; i++){
    if(types[i] < SGML_LIMITATION){
      fwrite(strings[i], 1, lengths[i], stdout);
    }
  }
}



#define BIG 16000

int main(int argc, char **argv)
{
  char buf[BIG];
  const char *p = buf;
  int qty;
  SGML_Lexer *lexer = SGML_createLexer();

  assert(lexer); /*@@ malloc() -> 0? */

  while(1){
    qty = fread(buf, 1, sizeof(buf)-1, stdin);

    if (qty <= 0) break;

    while(qty > 0){
      /* pick wierd-sized chunks to stress-test lexer.*/
      int chunk = *p % 23;
      
      if(chunk == 0) chunk = 1;
      if(chunk > qty) chunk = qty;
      
      SGML_lex(lexer,
	       p, chunk,
	       transparent, 0,
	       transparent, 0,
	       transparent, 0);
      
      qty -= chunk;
      p += chunk;
    }

    p = buf;
  };

  /* final step... */
  SGML_lex(lexer,
	   NULL, 0,
	   transparent, 0,
	   transparent, 0,
	   transparent, 0);

  SGML_delLexer(lexer);

  return 0;
}