| 36 | }; |
| 37 | |
| 38 | const string EscapeSql(const string& sql, const int64_t& max_escaped_len) noexcept { |
| 39 | stringstream ret; |
| 40 | function<bool()> pred; |
| 41 | |
| 42 | if (max_escaped_len == 0) { |
| 43 | return ""; // <-- Note: early return |
| 44 | } |
| 45 | |
| 46 | for (const auto& c : sql) { |
| 47 | switch(c) { |
| 48 | case '\n': |
| 49 | ret << '\\'; |
| 50 | ret << 'n'; |
| 51 | break; |
| 52 | case '\\': |
| 53 | case '\'': |
| 54 | case ';': |
| 55 | ret << '\\'; |
| 56 | default: |
| 57 | ret << c; |
| 58 | break; |
| 59 | } |
| 60 | |
| 61 | if (UNLIKELY(max_escaped_len > 0 |
| 62 | && static_cast<size_t>(ret.tellp() >= max_escaped_len))) { |
| 63 | break; |
| 64 | } |
| 65 | } |
| 66 | |
| 67 | return ret.str(); |
| 68 | } // function EscapeSql |
| 69 | |
| 70 | } // namespace impala |