fgetln.c raw

   1  #define _GNU_SOURCE
   2  #include "stdio_impl.h"
   3  #include <string.h>
   4  
   5  char *fgetln(FILE *f, size_t *plen)
   6  {
   7  	char *ret = 0, *z;
   8  	ssize_t l;
   9  	FLOCK(f);
  10  	ungetc(getc_unlocked(f), f);
  11  	if (f->rend && (z=memchr(f->rpos, '\n', f->rend - f->rpos))) {
  12  		ret = (char *)f->rpos;
  13  		*plen = ++z - ret;
  14  		f->rpos = (void *)z;
  15  	} else if ((l = getline(&f->getln_buf, (size_t[]){0}, f)) > 0) {
  16  		*plen = l;
  17  		ret = f->getln_buf;
  18  	}
  19  	FUNLOCK(f);
  20  	return ret;
  21  }
  22