Initial import of the CDE 2.1.30 sources from the Open Group.

cde/programs/dtinfo/DtMmdb/utility/buffer.h

@@ -0,0 +1,114 @@
+/*
+ * $XConsortium: buffer.h /main/6 1996/08/15 14:21:05 cde-hal $
+ *
+ * Copyright (c) 1993 HAL Computer Systems International, Ltd.
+ * 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  Unpublished -- rights reserved under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 INTERNATIONAL, LTD.  USE,
+ * DISCLOSURE, OR REPRODUCTION IS PROHIBITED WITHOUT THE
+ * PRIOR EXPRESS WRITTEN PERMISSION OF HAL COMPUTER SYSTEMS
+ * INTERNATIONAL, LTD.
+ * 
+ *                         RESTRICTED RIGHTS LEGEND
+ * Use, duplication, or disclosure by the Government is subject
+ * to the 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 INTERNATIONAL, LTD.
+ *                  1315 Dell Avenue
+ *                  Campbell, CA  95008
+ * 
+ */
+
+
+#ifndef _buffer_h
+#define _buffer_h 1
+
+#include <ctype.h>
+#include "utility/funcs.h"
+
+class buffer 
+{
+
+public:
+   buffer(const int sz = 1024) : v_swap_order(false) { _alloc(sz); };
+   buffer(buffer&);
+   virtual ~buffer();
+
+// buffer management functions
+   virtual void reset(); // clean the buffer
+   int expand_chunk(const int);       // expand buffer chunk
+   void set_chunk(char* ptr, const int sz) { 
+      v_bufsz = sz;
+      v_eptr = v_aptr = v_base = ptr;
+      v_allocated = 0;
+   };  // set buffer chunk
+   void set_content_sz(const int sz) {v_eptr = v_base + sz;} ;
+
+// buffer status functions
+   int buf_sz() const { return v_bufsz; };           // chunk length
+   int content_sz() const { return v_eptr - v_aptr; }; // content length 
+   int remaining_sz() const { return v_bufsz - int(v_eptr - v_aptr); }; // remaining space
+   char* get_base() const { return v_base; };  // get 'base'
+
+// get items 
+   buffer& get(char& y);                     // get current char
+   buffer& get(unsigned short& y);  	     // get a short
+   buffer& get(unsigned int& y);       	     // get a unsigned int
+   buffer& get(int& y);       	     	     // get an int
+   buffer& get(long& y);       	             // get a long
+   buffer& get(float & y);       	     // get a float 
+   buffer& get(char*, int) ;                 // get a string
+
+   buffer& getusc(int& y);                   // get unsigned char to intr. 
+					     // no boundary checking
+
+// put items 
+   buffer& put(const char content, Boolean exp_buf = false) ; // append char 
+   buffer& put(const unsigned char, Boolean exp_buf = false) ; //append unsigned char 
+   buffer& put(const int, Boolean exp_buf = false) ;           // append an int
+   buffer& put(const unsigned int, Boolean exp_buf = false) ;  // append a unsigned int
+   buffer& put(const long, Boolean exp_buf = false) ; 	       // append a long
+   buffer& put(const unsigned short, Boolean exp_buf = false) ; //append a short
+   buffer& put(const float y, Boolean exp_buf = false);       // put a float 
+   buffer& put(const char*, int, Boolean exp_buf = false) ;   // append a string
+
+   buffer& skip(int i) ;                       // skip i chars
+
+// set and get byte order 
+   void set_swap_order(Boolean x) { v_swap_order = x; };
+   Boolean get_swap_order() { return v_swap_order; };
+
+   friend Boolean operator ==(buffer&, buffer&);
+
+// show the buffer
+   friend ostream& operator <<(ostream&, buffer&);
+
+   friend class abs_storage;
+   friend class unixf_storage;
+   friend class page_storage;
+   friend class mem_storage;
+   friend class page_cache_global_part;
+
+protected:
+   char v_allocated;
+   unsigned int  v_bufsz ;   // allocated chunk size
+   char *v_base ;  // base address of the chunk
+   char *v_eptr ;  // end address of the buf content
+   char *v_aptr ;  // beginning address of the buf content
+   int  v_align_offset; // memory align offset
+
+   Boolean v_swap_order;
+
+protected:
+   void _alloc(const int sz);
+};
+
+typedef buffer* bufferPtr;
+   
+#endif