--- deliantra/server/include/dynbuf.h	2006/09/19 22:05:55	1.3
+++ deliantra/server/include/dynbuf.h	2009/10/12 14:00:58	1.22
@@ -1,69 +1,128 @@
+/*
+ * This file is part of Deliantra, the Roguelike Realtime MMORPG.
+ * 
+ * Copyright (©) 2005,2006,2007,2008 Marc Alexander Lehmann / Robin Redeker / the Deliantra team
+ * Copyright (©) 2002,2007 Mark Wedel & Crossfire Development Team
+ * Copyright (©) 1992,2007 Frank Tore Johansen
+ * 
+ * Deliantra is free software: you can redistribute it and/or modify it under
+ * the terms of the Affero GNU General Public License as published by the
+ * Free Software Foundation, either version 3 of the License, or (at your
+ * option) any later version.
+ * 
+ * This program 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 General Public License for more details.
+ * 
+ * You should have received a copy of the Affero GNU General Public License
+ * and the GNU General Public License along with this program. If not, see
+ * <http://www.gnu.org/licenses/>.
+ * 
+ * The authors can be reached via e-mail to <support@deliantra.net>
+ */
+
 #ifndef DYNBUF_H__
 #define DYNBUF_H__
 
 #include <cstring>
 #include <cassert>
 
+#include "util.h"
+#include "shstr.h"
+
 // this is a "buffer" that can grow fast
 // and is still somewhat space-efficient.
 // unlike obstacks or other data structures,
 // it never moves data around. basically,
 // this is a fast strstream without the overhead.
 
-class dynbuf
+struct dynbuf
 {
+protected:
   struct chunk
   {
     chunk *next;
+    int alloc;
     int size;
     char data[0];
   };
 
-  char *ptr;
-  int room;
-  int ext;
+  char *ptr, *end;
   int _size;
 
+  int extend, cextend;
   chunk *first, *last;
 
-  void _reserve (int size);
-  void clear ();
-  void finish ();
+  void reserve (int size);
+  void init (int initial);  // allocate sinitial chunk
+  void free (chunk *&chain); // free chain of chunks
+  char *_linearise ();
+  void finalise ();
 
 public:
   
-  dynbuf (int initial = 4096, int extend = 16384);
-  ~dynbuf ();
+  // initial - the size of the initial chunk to be allocated
+  // extend  - first incremental step when buffer size exceeded
+  dynbuf (int initial = 4096, int extend = 16384)
+  : extend (extend)
+  {
+    init (initial);
+  }
+
+  ~dynbuf ()
+  {
+    free (first);
+  }
+
+  // resets the dynbuf, but does not free the first chunk
+  // which is either of size "initial" or the size of the last
+  // linearise
+  void clear ();
 
-  int size () { return _size + (ptr - last->data); }
+  int  size  () const { return _size + (ptr - last->data); }
+  bool empty () const { return !size (); }
 
   void linearise (void *data);
-  char *linearise ();
+  char *linearise () // does not 0-terminate(!)
+  { 
+    return first->next ? _linearise () : first->data;
+  }
+
+  int room () const { return end - ptr; }
 
   char *force (int size)
   {
-    if (room < size)
-      _reserve (size);
+    if (expect_false (ptr + size >= end))
+      reserve (size);
 
     return ptr;
   }
 
-  char *alloc (int size)
+  char *falloc (int size)
   {
-    char *res = force (size);
-
-    room -= size;
+    char *res = ptr;
     ptr += size;
-
     return res;
   }
 
-  void fadd (char c) { --room; *ptr++ = c; }
+  char *alloc (int size)
+  {
+    force (size);
+    return falloc (size);
+  }
+
+  void fadd (char c) { *ptr++ = c; }
   void fadd (unsigned char c) { fadd (char (c)); }
+  void fadd (const void *p, int len)
+  {
+    memcpy (falloc (len), p, len);
+  }
 
   void add (const void *p, int len)
   {
-    memcpy (alloc (len), p, len);
+    force (len);
+    fadd (p, len);
   }
 
   void add (char c)
@@ -76,11 +135,10 @@
      add (s, strlen (s));
   }
 
-  static const int max_sint32_size = 11;
-  static const int max_sint64_size = 20;
-
-  void add (sint32 i);
-  void add (sint64 i);
+  void add (shstr_tmp s)
+  {
+    add (s.s, s.length ());
+  }
 
   //TODO
   //void add_destructive (dynbuf &buf);
@@ -88,6 +146,45 @@
   dynbuf &operator << (char c) { add (c); return *this; }
   dynbuf &operator << (unsigned char c) { return *this << char (c); }
   dynbuf &operator << (const char *s) { add (s); return *this; }
+  dynbuf &operator << (shstr_tmp s) { add (s); return *this; }
+  dynbuf &operator << (const std::string &s) { add (s.data(), s.size ()); return *this; }
+
+  operator std::string ();
+};
+
+struct dynbuf_text : dynbuf
+{
+  dynbuf_text (int initial = 4096, int extend = 16384)
+  : dynbuf (initial, extend)
+  { }
+
+  using dynbuf::add;
+  void add (sint32 i);
+  void add (sint64 i);
+
+  //TODO: should optimise the case printf "(name %+d)" as it comes up extremely often
+
+  //using dynbuf::operator <<; // doesn't work, sometimes C++ just suxx
+  // instead we use an ugly template function
+  template<typename T>
+  dynbuf_text &operator << (T c) { *(dynbuf *)this << c; return *this; }
+
+  dynbuf_text &operator << (sint16 i) { add (sint32 (i)); return *this; }
+  dynbuf_text &operator << (uint16 i) { add (sint32 (i)); return *this; }
+  dynbuf_text &operator << (sint32 i) { add (sint32 (i)); return *this; }
+  dynbuf_text &operator << (sint64 i) { add (sint64 (i)); return *this; }
+  dynbuf_text &operator << (uint32 i) { add (sint64 (i)); return *this; }
+  dynbuf_text &operator << (uint64 i) { add (sint64 (i)); return *this; }
+
+  void printf (const char *format, ...);
+  void vprintf (const char *format, va_list ap);
+
+  void add_abilities (const char *name, uint32 abilities);
+  void add_paths     (const char *name, uint32 paths);
+
+  // returns the string, linearised and with trailing \0
+  operator const char * ();
 };
 
 #endif
+