prop-src/textbuf.h

   1 ///////////////////////////////////////////////////////////////////////////////
   2 //
   3 //  Text buffer class
   4 //
   5 ///////////////////////////////////////////////////////////////////////////////
   6 #ifndef text_buffer_h
   7 #define text_buffer_h
   8
   9 #include <stdlib.h>
  10
  11 ///////////////////////////////////////////////////////////////////////////////
  12 //
  13 //  Text buffer represents a simple open-ended insertion only buffer,
  14 //  sort of like a light weight ostrstream.
  15 //
  16 ///////////////////////////////////////////////////////////////////////////////
  17 class TextBuffer
  18 {
  19 protected:
  20
  21    char * buffer;         // storage to buffer
  22    char * limit;          // limit of buffer
  23    char * cursor;         // cursor to next insertion point
  24
  25    void grow (size_t);    // expand buffer
  26
  27 public:
  28
  29    TextBuffer();
  30    TextBuffer(const TextBuffer&); // transfer to another buffer
  31   ~TextBuffer();
  32
  33    void operator = (const TextBuffer&); // transfer to another buffer
  34    void emit (const char *, long = -1);
  35    void emit (char);
  36    inline const char * text   () const { return buffer; }
  37    inline size_t       length () const { return cursor - buffer; }
  38    inline void         reset  ()       { cursor = buffer; }
  39 };
  40
  41 #endif