Read ref flag for NullOnly mode. Returns true if value present, false if null or error. Fast path: primitives, strings, time types use this.
| 120 | /// Returns true if value present, false if null or error. |
| 121 | /// Fast path: primitives, strings, time types use this. |
| 122 | FORY_ALWAYS_INLINE bool read_null_only_flag(ReadContext &ctx, |
| 123 | RefMode ref_mode) { |
| 124 | if (ref_mode == RefMode::None) { |
| 125 | return true; |
| 126 | } |
| 127 | int8_t flag = ctx.read_int8(ctx.error()); |
| 128 | if (FORY_PREDICT_FALSE(ctx.has_error())) { |
| 129 | return false; |
| 130 | } |
| 131 | if (flag == NULL_FLAG) { |
| 132 | return false; |
| 133 | } |
| 134 | // NotNullValue or RefValue both mean "continue reading" for non-trackable |
| 135 | // types |
| 136 | if (flag == NOT_NULL_VALUE_FLAG || flag == REF_VALUE_FLAG) { |
| 137 | return true; |
| 138 | } |
| 139 | if (flag == REF_FLAG) { |
| 140 | uint32_t ref_id = ctx.read_var_uint32(ctx.error()); |
| 141 | if (FORY_PREDICT_FALSE(ctx.has_error())) { |
| 142 | return false; |
| 143 | } |
| 144 | ctx.set_error(Error::invalid_ref( |
| 145 | "Unexpected reference flag for non-referencable value, ref id: " + |
| 146 | std::to_string(ref_id))); |
| 147 | return false; |
| 148 | } |
| 149 | |
| 150 | ctx.set_error(Error::invalid_data("Unknown reference flag: " + |
| 151 | std::to_string(static_cast<int>(flag)))); |
| 152 | return false; |
| 153 | } |
| 154 | |
| 155 | // ============================================================================ |
| 156 | // Type Info Helpers |