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|
//
// Simple string class
// Public domain
//
// Written by david nugent
// davidn@csource.pronet.com
// 3:632/348@fidonet
//
# if !defined( _str_h )
# define _str_h 1
# if defined( __BORLANDC__ ) && ( __BORLANDC__ <= 0x0300 )
# define PLACEMENT_NEW_BUG
# define SIGNED_CHAR_BUG
# endif
struct refstr
{
short _size;
short _length;
short _refs;
refstr (short length, short size)
: _length(length), _size(size), _refs(1)
{}
~refstr (void) {}
# if !defined( PLACEMENT_NEW_BUG )
void * operator new(unsigned sz, short allocsz);
# endif
char * ptr (void)
{
return ((char *)this) + sizeof(refstr);
}
};
class str
{
public:
// constructors/destructors
str (void)
{
_strinit();
}
str (char const * s, short len =-1)
{
_strinit(s, len, -1);
}
str (unsigned char const * s, short len =-1)
{
_strinit((char const *)s, len, -1);
}
# if !defined( SIGNED_CHAR_BUG )
str (signed char const * s, short len =-1)
{
_strinit((char const *)s, len, -1);
}
# endif
str (char c)
{
_strinit (&c, 1, -1);
}
str (unsigned char c)
{
_strinit ((char const *)&c, 1, -1);
}
# if !defined( SIGNED_CHAR_BUG )
str (signed char c)
{
_strinit ((char const *)&c, 1, -1);
}
# endif
str (str const & s)
: strdata(s.strdata)
{
++strdata->_refs;
}
~str (void)
{
if (!--strdata->_refs)
delete strdata;
}
// assignment
str & operator= (str const & s);
str & operator= (char const * s);
str & operator= (char c);
str & operator= (unsigned char const * s)
{
return operator= ((char const *)s);
}
# if !defined( SIGNED_CHAR_BUG )
str & operator= (signed char const * s)
{
return operator= ((char const *)s);
}
# endif
// primitive members
short length (void) const
{
return strdata->_length;
}
short size (void) const
{
return strdata->_size;
}
// operators
str & operator<< (char const * s) // concatenate
{
_concat (s);
return *this;
}
str & operator<< (unsigned char const * s)
{
_concat ((char const *)s);
return *this;
}
# if !defined( SIGNED_CHAR_BUG )
str & operator<< (signed char const * s)
{
_concat ((char const *)s);
return *this;
}
# endif
str & operator<< (str const & s)
{
_concat (s);
return *this;
}
str & operator<< (char c)
{
_concat (c);
return *this;
}
str & operator<< (unsigned char c)
{
_concat (c);
return *this;
}
# if !defined( SIGNED_CHAR_BUG )
str & operator<< (signed char c)
{
_concat (c);
return *this;
}
# endif
char & operator[] (short pos)
{
if (pos < 0 || pos >= strdata->_length)
{
char * buf = c_ptr() + length();
*buf = 0;
return *buf;
}
return c_ptr()[pos];
}
char * c_ptr (void) const // not necessarily NUL terminated!
{ // Use with caution...
return strdata->ptr();
}
char const * c_str (void) const // return char*
{
char * buf = c_ptr();
buf[strdata->_length] = 0;
return buf;
}
unsigned char const * u_str (void) const
{
return (unsigned char const *)c_str();
}
// manipulators
short insert (short pos, char const * s, short len =-1);
short insert (short pos, str const & s)
{
return insert (pos, s.c_ptr(), s.length());
}
short insert (short pos, unsigned char const * s,
short len =-1)
{
return insert (pos, (char const *)s, len);
}
# if !defined( SIGNED_CHAR_BUG )
short insert (short pos, signed char const * s,
short len =-1)
{
return insert (pos, (char const *)s, len);
}
# endif
short insert (short pos, char c)
{
return insert (pos, &c, 1);
}
short insert (short pos, unsigned char c)
{
return insert (pos, (char const *)&c, 1);
}
# if !defined( SIGNED_CHAR_BUG )
short insert (short pos, signed char c)
{
return insert (pos, (char const *)&c, 1);
}
# endif
short remove (short pos =0, short len =-1);
short replace (short pos, char const * s, short clen =-1,
short len =-1);
short replace (short pos, str & s, short clen =-1)
{
return replace (pos, s.c_ptr(), clen, s.length());
}
short replace (short pos, unsigned char const * s,
short clen =-1, short len =-1)
{
return replace (pos, (char const *)s, clen, len);
}
# if !defined( SIGNED_CHAR_BUG )
short replace (short pos, signed char const * s,
short clen =-1, short len =-1)
{
return replace (pos, (char const *)s, clen, len);
}
# endif
short replace (short pos, char c, short clen =-1)
{
return replace (pos, &c, clen, 1);
}
short replace (short pos, unsigned char c, short clen =-1)
{
return replace (pos, (char const *)&c, clen, 1);
}
# if !defined( SIGNED_CHAR_BUG )
short replace (short pos, signed char c, short clen =-1)
{
return replace (pos, (char const *)&c, clen, 1);
}
# endif
str & left (short len, char padch =' ');
str & right (short len, char padch =' ');
str & mid (short pos, short len, char padch =' ');
short removech (char const * clist ="\r\n");
short countch (char const * clist);
protected:
refstr * strdata;
// Check to see if big enough for size
int _chksize (short sz =0);
int _concat (char const * s, short len =-1);
int _concat (str const & s)
{
return _concat (s.c_ptr(), s.length());
}
int _concat (char ch)
{
return _concat (&ch, 1);
}
int _concat (unsigned char const * s, short len =-1)
{
return _concat ((char const *)s, len);
}
# if !defined( SIGNED_CHAR_BUG )
int _concat (signed char const * s, short len =-1)
{
return _concat ((char const *)s, len);
}
# endif
private:
// Common constructor
void _strinit (char const * s =0, short slen =0,
short siz =-1);
};
str left (str const & s, short len, char padch =' ');
str right (str const & s, short len, char padch =' ');
str mid (str const & s, short pos, short len, char padch =' ');
# endif
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