/* parse_file_list.c,v 1.2 2000/06/04 22:00:03 brunsch Exp */
/**************************************************************************
 *									  *
 * 		 Copyright (C) 1995 Silicon Graphics, Inc.		  *
 *									  *
 *  These coded instructions, statements, and computer programs were	  *
 *  developed by SGI for public use.  If any changes are made to this code*
 *  please try to get the changes back to the author.  Feel free to make  *
 *  modifications and changes to the code and release it.		  *
 *									  *
 **************************************************************************/
#include <stdio.h>
#include <errno.h>
#include <signal.h>
#include <stdlib.h>
#include <string.h>

#ifndef WIN32
#include <netdb.h>
#include <sys/param.h>
#endif /* WIN32 */

#include <sys/types.h>

#ifndef WIN32
#include <sys/ipc.h>
#include <sys/shm.h>
#include <sys/errno.h>
#include <sys/socket.h>
#include <sys/time.h>
#include <netinet/in.h>
#else
#include <windows.h>
#include <process.h>
#include <time.h>
#include <winsock.h>
#endif /* WIN32 */

#include <ctype.h>

#include "sysdep.h"
#include "bench.h"


/* 
 * count_file_list()
 * given a filename, return a guess at the number of pages
 */
int
count_file_list(const char *url_list_file)
{
  FILE 	*fp;
  long int num_of_pages;
  char 	   a_line[BUFSIZ];
  char     *textvalue;
  int      returnval;

  fp = fopen(url_list_file, "r");
  
  if (fp == NULL)
    {
      D_PRINTF( "Error %d opening filelist %s: %s\n", 
		       errno, url_list_file, strerror(errno) );;
      return(returnerr("Error %d opening filelist %s: %s\n", 
		       errno, url_list_file, strerror(errno)));
    }
  else
    {
      num_of_pages = 0;
      D_PRINTF( "Opened file, about to count\n" );
      /*
       * parse through the file line-by-line 
       * strip out comments, but don't check for URL consistency
       */
      while (fgets(a_line, BUFSIZ, fp) != NULL)
	{
	  textvalue = a_line;
	  /* check for comments */
	  if (strchr(textvalue, '#') != NULL)
	    {
	      /* throw out anything after any '#' */
	      D_PRINTF( "Stripping comment from line: %s\n", textvalue );
	      returnval = strcspn(textvalue, "#");
	      D_PRINTF( "Found first # at %d\n", returnval );
	      if (returnval == 0) 
		{
		  textvalue = NULL;
		}
	    }
	  /* is there more? */
	  if (textvalue != NULL) 
	    {
	      num_of_pages++;
	      D_PRINTF( "Found %ld pages\n", num_of_pages );
	    }
	}
      return(num_of_pages);
    }
  fclose(fp);
} /* end count_file_list() */

/* 
 * parse_file_list()
 * given a filename, a pointer to a page list, and pointers to integers
 * for the number of pages and the number of files, parse its contents.
 */
void
parse_file_list (const char *url_list_file, page_list_t *page_list, 
		 long int *num_of_pages, long int *num_of_files)
{
  FILE 	*fp;
  int         filenum;
  int         returnval;
  int         loadnum;
  char 	      a_line[BUFSIZ];
  char        tempbuf[BUFSIZ];
  char        *textvalue;
  int	      numfiles = 1, numpages = 0;
  int	      maxpages = *num_of_pages;
  page_list_t	*pp;

  extern int haveproxyserver;

  fp = fopen(url_list_file, "r");
  
  if (fp == NULL)
    {
      errexit("Error %d opening filelist: %s\n", errno, strerror(errno));
    }
  else
    {
      /* 
       * GRAB A LINE. FORMAT IS: URL WEIGHTINGFACTOR 
       * EXAMPLE: http://www/file.html 1
       */
      D_PRINTF( "File is open.\n" );
      while(fgets(a_line, BUFSIZ, fp) != NULL)
	{
	  textvalue = a_line;
	  /* check for comments */
	  if (strchr(textvalue, '#') != NULL)
	    {
	      /* throw out anything after a '#' */
	      D_PRINTF( "Stripping comment from line: %s\n", textvalue );
	      returnval = strcspn(textvalue, "#");
	      D_PRINTF( "Found first # at %d\n", returnval );
	      if (returnval == 0) 
		continue;
	    }

	  if (numpages >= *num_of_pages)
	    errexit("Out of space in parse_file_list()\n");

	  pp = &page_list[numpages];

	  D_PRINTF( "Processing page %ld\n", numpages );
	  loadnum = 0;

	  if (textvalue != NULL) { /* is there more? */
	    /* check for weighting factor */
	    D_PRINTF( "Setting page values from: %s\n", textvalue );
	    returnval = sscanf(textvalue, "%s%d", tempbuf, &loadnum);
	    D_PRINTF( "Scan for weighting returns %d, %d\n",
	      returnval, loadnum );
	    if (returnval == EOF || loadnum <= 0)
	      {
		pp->load_num = 1;
	      }
	    else
	      {
		pp->load_num = loadnum;
	      }
	    D_PRINTF( "Setting load=%d for line: %s\n", 
	      pp->load_num, textvalue );

	    /* placeholder for grouping multiple files onto one page */
	    pp->num_of_files = 1;
	    filenum = 0;

	    textvalue = tempbuf;
	    D_PRINTF( "Line is now: %s\n", textvalue );

	    /* 
	     * if we've got a proxy server, we'll assume that the
	     * remaining text is a valid URL, and stuff it into
	     * page_list[numpages].filename[filenum]
	     * Otherwise, we'll have to parse it out.
	     */

	    if (haveproxyserver)
	      {
		pp->servername[filenum] = NULL;
		pp->port_number[filenum] = 0;
		strcpy(pp->filename[filenum], textvalue);
	      }
	    else /* no proxy server, so we have to parse it out... */
	      {
		/* try http://server(:port)/file */
		D_PRINTF( "Trying http://server(:port)/filename\n" );
		returnval = sscanf(textvalue, "http://%[^/]%s",  
				   tempbuf,
				   a_line);
		/* check server string for :port */
		if (returnval != 0 && returnval != EOF) 
		  {
		    D_PRINTF( "Setting filename %s\n", a_line );
		    strcpy(pp->filename[filenum], 
			   a_line);
		    
		    D_PRINTF( "Checking %s for :portnumber\n", tempbuf );
		    returnval = sscanf(tempbuf, "%[^:]:%d",
				       a_line,
				       &pp->port_number[filenum]);
		
		    if (returnval < 2)
		      {
			pp->port_number[filenum] = 80;
		      }
		    if (returnval == EOF)
		      {
			pp->servername[filenum] = NULL;
		      }
		    else
		      {
			D_PRINTF( "Port number %d, setting server %s\n",
			  pp->port_number[filenum],
			  a_line );
			
			strcpy(pp->servername[filenum], a_line);
		      }

		    D_PRINTF( "Server %s, port number %d\n", 
		      pp->servername[filenum],
		      pp->port_number[filenum] );
		  }
		else /* no good - try straight filename */
		  {
		    pp->port_number[filenum] = 80;
		    D_PRINTF( "Trying filename, returnval=%d\n", 
		      returnval );
		    pp->servername[filenum] = NULL;
		    D_PRINTF( "Server %s, port number %d\n", 
		      pp->servername[filenum],
		      pp->port_number[filenum] );
		    returnval = sscanf(textvalue, "%s", a_line);
		    D_PRINTF( "Scan returned filename %s\n", a_line );

		    strcpy(pp->filename[filenum], a_line);
		  } /* end of parsing */
	      } /* end if haveproxyserver */

	    D_PRINTF( "Done parsing line\n" );
	    D_PRINTF( "Got server %s, port %d, file %s, returnval %d\n",
	      pp->servername[filenum],
	      pp->port_number[filenum],
	      pp->filename[filenum],
	      returnval );
	  } /* end if textvalue not NULL */

	  numpages++;
	} /* end while not EOF */
      if (numpages < 1)
	{
	  returnerr("No files are specified by filelist\n");
	}
    } /* end if file ok */
    fclose(fp);
    D_PRINTF( "Returning %ld pages and %ld files\n", 
      numpages, numfiles );

    *num_of_pages = numpages;
    *num_of_files = numfiles;
}
/* end parse_file_list */

long int
load_percent(page_list_t *page_list, long int number_of_pages)
{
  int i;
  long int index_number = 0;

  for (i = 0; i < number_of_pages; i++)
    {    
      index_number += page_list[i].load_num;
    }
  
  D_PRINTF( "load_percent returning %d\n", (index_number) );
  return(index_number);
}

