flower/stringhandle.hh

   1 /*
   2   stringhandle.hh -- declare String_handle
   3
   4   source file of the LilyPond music typesetter
   5
   6   (c) 1997 Han-Wen Nienhuys <hanwen@stack.nl>
   7 */
   8
   9
  10 #ifndef STRINGHANDLE_HH
  11 #define STRINGHANDLE_HH
  12 #include "fproto.hh"
  13
  14
  15 /**
  16   Reference counting for strings.
  17
  18    handles ref. counting, and provides a very thin interface using
  19    Byte *
  20
  21    */
  22 class String_handle {
  23     String_data* data;
  24
  25     /// decrease ref count. Named kind of like a Tanenbaum semafore
  26     void down();
  27
  28     /// increase ref count
  29     void up(String_data *d);
  30
  31     /** make sure data has only one reference.
  32        POST: data->references == 1
  33       */
  34     void copy();
  35
  36 public:
  37     String_handle();
  38     ~String_handle();
  39     String_handle(String_handle const & src);
  40
  41     Byte const* byte_c_l() const;
  42     char const* ch_c_l() const;
  43     Byte* byte_l();
  44     char* ch_l();
  45
  46     void operator =(String_handle const &src);
  47     void operator += (char const *s);
  48     Byte operator[](int j) const;
  49
  50     /** Access elements. WARNING: NOT SAFE
  51        don't use this for loops. Use byte_c_l()
  52        */
  53     Byte &operator[](int j);
  54     void append( Byte const* byte_c_l, int length_i );
  55     void set( Byte const* byte_c_l, int length_i );
  56     void operator = (char const *p);
  57     void trunc(int j);
  58     int length_i() const;
  59 };
  60
  61 #ifdef STRING_UTILS_INLINED
  62 #ifndef INLINE
  63 #define INLINE inline
  64 #endif
  65 #include "stringhandle.inl"
  66 /* we should be resetting INLINE. oh well. */
  67 #endif
  68
  69
  70 #endif // STRINGHANDLE_HH