🚀 go-pugleaf

> Unfreezing a previously frozen (with str) ostrstream, when that
> ostrstream has a fixed, user-supplied buffer,

Well, you can't unfreeze an ostrstream with a fixed user-supplied
buffer.  In this case the freeze(0) should be ignored.
Patches to do so are appended below.

	--Per Bothner
Cygnus Support     bothner@cygnus.com

===================================================================
RCS file: /rel/cvsfiles/devo/libg++/iostream/strstream.h,v
retrieving revision 1.10
diff -c -r1.10 strstream.h
*** 1.10	1992/11/03 06:30:01
--- strstream.h	1993/01/26 03:01:10
***************
*** 33,38 ****
--- 33,39 ----
      void init_const() { xsetflags(_S_NO_WRITES); }
      void init_static(char *ptr, int size, char *pstart);
    protected:
+     int is_static() const { return _allocate_buffer == (_alloc_type)0; }
      virtual int overflow(int = EOF);
      virtual int underflow();
      virtual int pbackfail(int c);
***************
*** 56,64 ****
      strstreambuf(const signed char *ptr, int size)
  	{ init_static((char*)ptr, size, NULL); init_const(); }
  #endif
      int frozen() { return _flags & _S_USER_BUF ? 1 : 0; }
      void freeze(int n=1)
! 	{ if (n) _flags |= _S_USER_BUF; else _flags &= ~_S_USER_BUF; }
      _G_size_t pcount();
      char *str();
      virtual streampos seekoff(streamoff, _seek_dir, int mode=ios::in|ios::out);
--- 57,67 ----
      strstreambuf(const signed char *ptr, int size)
  	{ init_static((char*)ptr, size, NULL); init_const(); }
  #endif
+     // Note: frozen() is always true if is_static().
      int frozen() { return _flags & _S_USER_BUF ? 1 : 0; }
      void freeze(int n=1)
! 	{ if (!is_static())
! 	    { if (n) _flags |= _S_USER_BUF; else _flags &= ~_S_USER_BUF; } }
      _G_size_t pcount();
      char *str();
      virtual streampos seekoff(streamoff, _seek_dir, int mode=ios::in|ios::out);
===================================================================
RCS file: /rel/cvsfiles/devo/libg++/iostream/strstream.C,v
retrieving revision 1.15
diff -c -r1.15 strstream.C
*** 1.15	1992/10/17 00:26:47
--- strstream.C	1993/01/26 02:59:57
***************
*** 182,189 ****
  streampos strstreambuf::seekoff(streamoff off, _seek_dir dir,
  					int mode /*=ios::in|ios::out*/)
  {
-     _allocate_buffer = default_alloc;
-     _free_buffer = default_free;
      size_t cur_size = pcount();
      streampos new_pos = EOF;
  
--- 182,187 ----