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har *get_next_line(FILE * file){	int index = 0;	int bufsize = BUFSIZE;	signed char temp;	char *buffer = NULL;	buffer = (char *) malloc(bufsize);	if (!buffer)		return NULL;	while ((temp = fgetc(file)) != '\n') {		if (feof(file))			return NULL;		if (index == bufsize) {			bufsize += BUFSIZE;			buffer = (char *) realloc(buffer, bufsize);		}		buffer[index++] = temp;	}	if (index == bufsize)		buffer = (char *) realloc(buffer, ++bufsize);	buffer[index] = '\0';	buffer =	    (char *) realloc(buffer, strlen(buffer) ? strlen(buffer) : 1);	return buffer;}