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 }