15 /* Read up to (and including) a TERMINATOR from STREAM into *LINEPTR
16    + OFFSET (and null-terminate it). *LINEPTR is a pointer returned from
21 static int getstr(char **lineptr, size_t *n, FILE *stream,  in getstr()  argument
24 	int nchars_avail;	/* Allocated but unused chars in *LINEPTR.  */  in getstr()
25 	char *read_pos;		/* Where we're reading into *LINEPTR. */  in getstr()
28 	if (!lineptr || !n || !stream)  in getstr()
31 	if (!*lineptr) {  in getstr()
33 		*lineptr = malloc(*n);  in getstr()
34 		if (!*lineptr)  in getstr()
39 	read_pos = *lineptr + offset;  in getstr()
48 		assert(*n - nchars_avail == read_pos - *lineptr);  in getstr()
55 			nchars_avail = *n + *lineptr - read_pos;  in getstr()
56 			*lineptr = realloc(*lineptr, *n);  in getstr()
57 			if (!*lineptr)  in getstr()
59 			read_pos = *n - nchars_avail + *lineptr;  in getstr()
60 			assert(*n - nchars_avail == read_pos - *lineptr);  in getstr()
65 			if (read_pos == *lineptr)  in getstr()
82 	ret = read_pos - (*lineptr + offset);  in getstr()
86 int getline (char **lineptr, size_t *n, FILE *stream)  in getline()  argument
88 	return getstr(lineptr, n, stream, '\n', 0);  in getline()