inline void write(const string_type & src, string_type & dest) {
dest.insert( dest.begin(), src.begin(), src.end() );
}
inline void write(char_array src, string_type & dest ) {
const char_type * end = src;
for ( ; *end; ++end) {}
dest.insert( dest.begin(), src, end);
}
void expand_escapes(string_type& s)
{
for(unsigned int i = 0; i < s.size(); ++i)
{
if(s[i] == BOOST_RE_STR('\\'))
{
switch(s[i+1])
{
case BOOST_RE_STR('a'):
s.erase(s.begin() + i);
s[i] = BOOST_RE_STR('\a');
break;
case BOOST_RE_STR('b'):
s.erase(s.begin() + i);
s[i] = BOOST_RE_STR('\b');
break;
case BOOST_RE_STR('f'):
s.erase(s.begin() + i);
s[i] = BOOST_RE_STR('\f');
break;
case BOOST_RE_STR('n'):
s.erase(s.begin() + i);
s[i] = BOOST_RE_STR('\n');
break;
case BOOST_RE_STR('r'):
s.erase(s.begin() + i);
s[i] = BOOST_RE_STR('\r');
break;
case BOOST_RE_STR('t'):
s.erase(s.begin() + i);
s[i] = BOOST_RE_STR('\t');
break;
case BOOST_RE_STR('v'):
s.erase(s.begin() + i);
s[i] = BOOST_RE_STR('\v');
break;
default:
if( (s[i + 1] >= BOOST_RE_STR('0')) && (s[i + 1] <= BOOST_RE_STR('9')) )
{
int val = 0;
unsigned int pos = i;
++i;
while((i < s.size()) && (s[i] >= BOOST_RE_STR('0')) && (s[i] <= BOOST_RE_STR('9')))
{
val *= 10;
val += s[i] - BOOST_RE_STR('0');
++i;
}
s.erase(s.begin() + pos, s.begin() + i);
if(0 == val)
{
s.insert(s.begin()+pos, ' ');
s[pos] = 0;
}
else
s.insert(s.begin() + pos, (string_type::value_type)val);
i = pos;
}
else
{
s.erase(s.begin() + i);
}
}
}
}
}
