| 117 | } |
| 118 | |
| 119 | static bool DecodeMSB(uint32_t& value, const char*& buffer) |
| 120 | { |
| 121 | bool ok = true; |
| 122 | const uint32_t MAX_CONSUMED = 5; |
| 123 | uint32_t consumed = 0; |
| 124 | uint32_t decoded = 0; |
| 125 | uint8_t count = 0; |
| 126 | while (true) |
| 127 | { |
| 128 | uint8_t current = (uint8_t)*buffer++; |
| 129 | ++consumed; |
| 130 | decoded |= (current & 0x7f) << (7 * count++); |
| 131 | if (0 == (current & 0x80)) |
| 132 | { |
| 133 | break; |
| 134 | } |
| 135 | else if (consumed > MAX_CONSUMED) |
| 136 | { |
| 137 | ok = false; |
| 138 | break; |
| 139 | } |
| 140 | } |
| 141 | value = decoded; |
| 142 | return ok; |
| 143 | } |
| 144 | |
| 145 | enum SubType |
| 146 | { |