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#include "mystring.h"
// return the sub-string ending at 'offset'
mystring mystring::left(size_t offset) const
{
if(offset > rep->length)
return *this;
else
return mystring(rep->buf, offset);
}
// return the sub-string starting at 'offset'
mystring mystring::right(size_t offset) const
{
if(offset >= rep->length)
return mystring();
else if(offset == 0)
return *this;
else
return mystring(rep->buf+offset, rep->length-offset);
}
// return the 'len' characters of the string starting at 'offset'
mystring mystring::sub(size_t offset, size_t len) const
{
// return right(offset).left(len);
if(len == 0)
return mystring();
else if(offset == 0 && len >= rep->length)
return *this;
else {
if(len+offset >= rep->length)
len = rep->length - offset;
return mystring(rep->buf+offset, len);
}
}
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