genutils.c,v

这是P2P流媒体方案－NICE的实现源码

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1.1
date	2002.07.02.19.29.15;	author rbraud;	state Exp;
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1.1
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@Initial revision
@
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@/*
 * \answer genutils for ODYSSEY
 *
 *--------------
 * $Revision: 1.1 $
 *--------------
 * $Log: genutils.c,v $
 * Revision 1.1  2002/01/26 17:59:45  suman
 * Initial revision
 *
 * Revision 1.4  2001/05/29 20:27:05  msanders
 * changes for December 2000 demo
 *
 * Revision 1.3  1999/05/20 22:29:52  merugu
 * Utils src cleaned...
 *
 * Revision 1.2  1999/05/20 00:14:54  msanders
 * removed static hosts and mac addresses, now use arp for dns2eth
 * resolution
 *
 * Revision 1.1.1.1  1999/04/14 04:37:05  merugu
 * Importing Odyssey
 *
 * Revision 1.1.1.1  1999/04/14 04:11:45  merugu
 * Importing Odyssey
 *
 * Revision 1.1.1.1  1999/04/05 22:15:44  merugu
 * Importing Odyssey Source
 *
 * Revision 1.1  1999/01/30  01:58:24  merugu
 * Initial revision
 *
 * Revision 1.2  1998/11/08 21:25:34  bobby
 * General Utilities
 *
 * Revision 1.1  1998/11/07 17:32:02  bobby
 * Initial revision
 *
 * Revision 1.3  1998/10/28 23:12:09  merugu
 * *** empty log message ***
 *
 */

#include <sys/time.h>
#include <stdio.h>
#include <unistd.h>

#ifdef IRIX64_6
#include </usr/local/lib/gcc-lib/mips-sgi-irix5.3/2.7.2.2/include/stdarg.h>
/* if this is not ugly i dont know what is! */
#else
#include <stdarg.h>
#endif

#include <sys/types.h>

#include <math.h>
#include <limits.h>
#include <string.h> 
#include <stdlib.h>
#include <signal.h>
#include <sys/stat.h>
#include <fcntl.h>


#include "general.h"
#define ALWAYS TRUE

/*
 * conditional printer -- print iff
 * c is true 
 */

void c_printf (boolean c, ...){
  va_list ap;
  char *f;
  if (!c)
    return;
  va_start(ap, c);
  f = va_arg (ap, char *);
  vprintf (f, ap);
  fflush(stdout);
  va_end (ap);
}


/*
 * conditional warning
 * print warning string iff
 * condition c is true
 */
 
void c_warning (boolean c, ...){
  /*
   * conditional printer -- print iff
   * c is true 
   */
  va_list ap;
  char *f;
  if (!c)
    return;
  printf ("Warning: ");
  va_start(ap, c);
  f = va_arg (ap, char *);
  vprintf (f, ap);
  fflush(stdout);
  va_end (ap);
}

/*
 * panic/quit with s as banner
 */
void panic (char *s)
{
  c_printf (ALWAYS, "===================== panic in <%s>\n", s);
  select (0, 0, 0, 0, 0x0);
  exit(-1);
}

/* internal function
 * usage:
 * panic_if (c)
 * will panic iff c is true
 */

void panic_if_cond (int a, char *f, int l, char *fn)
{
  if (a){
    c_printf (ALWAYS, "Panic:: <%s.%d::%s>\n", f, l, fn);
    exit(-1);
  }
}

/*
 * allocate a buffer of size equal to the file
 * of name "fname" in the char **s
 * read fname into s
 * return: length of fname
 */

long alloc_read (char **s, char *fname){
  int fd = -1;
  struct stat sbuf;
  char *fin;
  char cc[1024];
  
  fd = open(fname, O_RDONLY);
  if (fd < 0){
    sprintf (cc, "alloc-read: open %s", fname);
    panic (cc);
  }
  fstat (fd, &sbuf);
  
  fin = (char *) getmem (sbuf.st_size+1);
  if (!fin) {
    panic ("alloc-read: getmem failure\n");
  }
  if (fd) {
    read (fd, fin, sbuf.st_size);
    close (fd);
  }
  fin[sbuf.st_size]=0x0;
  *s = fin;
  return sbuf.st_size;
}
 
@