Category : Recently Uploaded Files
Archive   : SNIP9503.ZIP
Filename : ISFOPEN.C

 
Output of file : ISFOPEN.C contained in archive : SNIP9503.ZIP
/*
** Find out if a FILE * is valid
**
** public domain demo by Bob Stout
*/

#include

#ifdef __TURBOC__
#define STREAM_BUF _streams
#define FCNT FOPEN_MAX
#define FLAG flags
#else /* MSC, ZTC++ */
#define STREAM_BUF _iob
#define FCNT _NFILE
#define FLAG _flag
#endif

typedef enum {FALSE, TRUE} LOGICAL;

int isfopen(FILE *fp)
{
int i;

for (i = 0; i < FCNT; ++i)
{
if (0 != STREAM_BUF[i].FLAG && fp == &STREAM_BUF[i])
return TRUE;
}
return FALSE;
}

#ifdef TEST

main()
{
printf("stdout is%s valid\n", isfopen(stdout) ? "":" not");
printf("buffer #10 is%s valid\n", isfopen(&STREAM_BUF[9]) ? "":" not");
return 0;
}

#endif /*TEST */


  3 Responses to “Category : Recently Uploaded Files
Archive   : SNIP9503.ZIP
Filename : ISFOPEN.C
”

  1. Daniel says:
    January 27, 2013 at 3:59 pm

    Very nice! Thank you for this wonderful archive. I wonder why I found it only now. Long live the BBS file archives!

  2. Joshie says:
    March 18, 2014 at 4:57 pm

    This is so awesome! 😀 I’d be cool if you could download an entire archive of this at once, though.

  3. DiskingRound says:
    January 14, 2015 at 10:57 pm

    But one thing that puzzles me is the “mtswslnkmcjklsdlsbdmMICROSOFT” string. There is an article about it here. It is definitely worth a read: http://www.os2museum.com/wp/mtswslnk/