STRING::STRING(const STRING& str) { str.FixHeader(); const STRING_HEADER* str_header = str.GetHeader(); int str_used = str_header->used_; char *this_cstr = AllocData(str_used, str_used); memcpy(this_cstr, str.GetCStr(), str_used); assert(InvariantOk()); }
BOOL8 STRING::operator!=(const STRING& str) const { FixHeader(); str.FixHeader(); const STRING_HEADER* str_header = str.GetHeader(); const STRING_HEADER* this_header = GetHeader(); int this_used = this_header->used_; int str_used = str_header->used_; return (this_used != str_used) || (memcmp(GetCStr(), str.GetCStr(), this_used) != 0); }
STRING STRING::operator+(const char ch) const { STRING result; FixHeader(); const STRING_HEADER* this_header = GetHeader(); int this_used = this_header->used_; char* result_cstr = result.ensure_cstr(this_used + 1); STRING_HEADER* result_header = result.GetHeader(); int result_used = result_header->used_; // copies '\0' but we'll overwrite that memcpy(result_cstr, GetCStr(), this_used); result_cstr[result_used] = ch; // overwrite old '\0' result_cstr[result_used + 1] = '\0'; // append on '\0' ++result_header->used_; assert(InvariantOk()); return result; }