text: /*
   * Copyright (c) 2015 Joerg Jung <jung@openbsd.org>
   *
   * Permission to use, copy, modify, and distribute this software for any
   * purpose with or without fee is hereby granted, provided that the above
   * copyright notice and this permission notice appear in all copies.
   *
   * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
   * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
   * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
   * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
   */
  
  /*
   * portable fgetln() version, NOT reentrant
   */
  
  #ifndef HAVE_FGETLN
  #include <stdio.h>
  #include <stdlib.h>
  #include <errno.h>
  
  void *reallocarray(void *, size_t, size_t);
  
  char *
  fgetln(FILE *fp, size_t *len)
  {
  	static char *buf = NULL;
  	static size_t bufsz = 0;
  	size_t r = 0;
  	char *p;
  	int c, e;
  
  	if (buf == NULL) {
  		if ((buf = calloc(1, BUFSIZ)) == NULL)
  			return NULL;
  		bufsz = BUFSIZ;
  	}
  
  	while ((c = getc(fp)) != EOF) {
  		buf[r++] = c;
  		if (r == bufsz) {
  			if (!(p = reallocarray(buf, 2, bufsz))) {
  				e = errno;
  				free(buf);
  				errno = e;
  				buf = NULL, bufsz = 0;
  				return NULL;
  			}
  			buf = p, bufsz = 2 * bufsz;
  		}
  		if (c == '\n')
  			break;
  	}
  	return (*len = r) ? buf : NULL;
  }
  #endif
  