com32/lib/fgets.c

   1 /*
   2  * fgets.c
   3  *
   4  * This will be very slow due to the implementation of getc(),
   5  * but we can't afford to drain characters we don't need from
   6  * the input.
   7  */
   8
   9 #include <stdio.h>
  10
  11 char *fgets(char *s, int n, FILE *f)
  12 {
  13   int ch;
  14   char *p = s;
  15
  16   while ( n > 1 ) {
  17     ch = getc(f);
  18     if ( ch == EOF ) {
  19       *p = '\0';
  20       return (p == s) ? NULL : s;
  21     }
  22     *p++ = ch;
  23     if ( ch == '\n' )
  24       break;
  25     n--;
  26   }
  27   if ( n )
  28     *p = '\0';
  29
  30   return s;
  31 }