CDE/cde/lib/DtMmdb/utility/ostring.h

/*
 * CDE - Common Desktop Environment
 *
 * Copyright (c) 1993-2012, The Open Group. All rights reserved.
 *
 * These libraries and programs are free software; you can
 * redistribute them and/or modify them under the terms of the GNU
 * Lesser General Public License as published by the Free Software
 * Foundation; either version 2 of the License, or (at your option)
 * any later version.
 *
 * These libraries and programs are distributed in the hope that
 * they will be useful, but WITHOUT ANY WARRANTY; without even the
 * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
 * PURPOSE. See the GNU Lesser General Public License for more
 * details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with these libraries and programs; if not, write
 * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
 * Floor, Boston, MA 02110-1301 USA
 */
/*
 * $XConsortium: ostring.h /main/3 1996/06/11 17:38:12 cde-hal $
 *
 * Copyright (c) 1992 HaL Computer Systems, Inc.  All rights reserved.
 * UNPUBLISHED -- rights reserved under the Copyright Laws of the United
 * States.  Use of a copyright notice is precautionary only and does not
 * imply publication or disclosure.
 * 
 * This software contains confidential information and trade secrets of HaL
 * Computer Systems, Inc.  Use, disclosure, or reproduction is prohibited
 * without the prior express written permission of HaL Computer Systems, Inc.
 * 
 *                         RESTRICTED RIGHTS LEGEND
 * Use, duplication, or disclosure by the Government is subject to
 * restrictions as set forth in subparagraph (c)(l)(ii) of the Rights in
 * Technical Data and Computer Software clause at DFARS 252.227-7013.
 *                        HaL Computer Systems, Inc.
 *                  1315 Dell Avenue, Campbell, CA  95008
 * 
 */


#ifndef _ostring_h
#define _ostring_h 1

#include "utility/funcs.h"

class ostring {

public:
   ostring();
   ostring(const int chunk_size);
   ostring(char* str, const int str_sz = -1); // -1 means take strlen(str)
   ostring(const ostring&);
   virtual ~ostring() { delete [] v_p; };

// length of the string
   int size() const { return v_sz; };                
// length of the allocated chunk
   int alloc_size() const { return v_allo_sz; };     

   ostring& operator +(ostring&);   // merge of two strings
   int substr(ostring&);            // substring matching
   
// set string to content x
   Boolean set(const char* x) { return set(x, strlen(x)); };        

   Boolean set(const char* x, int i); // set string to content x with length i
   Boolean append(const char* x, int l); // append a string x of length i
   Boolean update(const char* x, int l, int offset); // update a substring x of length i at 'offset'. offset + l should be sz
     
//set alloc_sz to at least new_alloc_sz bytes
// pre_zero = true -> zero new space before copy old content over
   Boolean expand(const int, Boolean pre_zero = false); 

   void reset() { v_sz = 0; };
   void set_size(const int s) { v_sz = s; v_p[v_sz] = 0; };

   char* get() const { return v_p; }; // get char pointer p

   char* acquire() ; // return what is pointed at by p and reset 
                    // alloc_sz, sz, and p to 0;

// append x to this and return this.  
   ostring* operator+= (ostring* x); 

// concate all ostring arguments (ostring* 's) to this and return this.
   ostring* concate_with(...); 

   Boolean string_LS(ostring&) const;
   Boolean string_EQ(ostring&) const;

   friend ostream& operator <<(ostream&, const ostring&);
   friend istream& operator >>(istream&, ostring&);

protected:
   char *v_p;      // memory chunk pointer
   int v_sz;       // string size
   int v_allo_sz;  // allocated memory chunk size

#ifdef C_API
   static char* input_buf;

   friend void initialize_MMDB();
   friend void quit_MMDB();
#else
   static char input_buf[LBUFSIZ];
#endif
};

#endif