/* A convient interface to int4str.c, specifically for document names. *//* Copyright (C) 1997 Andrew McCallum   Written by:  Andrew Kachites McCallum <mccallum@cs.cmu.edu>   This file is part of the Bag-Of-Words Library, `libbow'.   This library is free software; you can redistribute it and/or   modify it under the terms of the GNU Library General Public License   as published by the Free Software Foundation, version 2.      This library is distributed in the hope that it will be useful,   but WITHOUT ANY WARRANTY; without even the implied warranty of   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU   Library General Public License for more details.   You should have received a copy of the GNU Library General Public   License along with this library; if not, write to the Free Software   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111, USA */#include <bow/libbow.h>static bow_int4str *doc_map = NULL;const char *bow_int2docname (int index){  if (!doc_map)    bow_error ("No documents yet added to the int-docname mapping.\n");  return bow_int2str (doc_map, index);}intbow_docname2int (const char *docname){  if (!doc_map)    doc_map = bow_int4str_new (0);  return bow_str2int (doc_map, docname);}intbow_num_docnames (){  return doc_map->str_array_length;}voidbow_docnames_write (FILE *fp){  bow_int4str_write (doc_map, fp);}voidbow_docnames_read_from_fp (FILE *fp){  if (doc_map)    bow_int4str_free (doc_map);  doc_map = bow_int4str_new_from_fp (fp);}