| Index: trunk/willow/src/include/util.h |
| — | — | @@ -89,6 +89,9 @@ |
| 90 | 90 | }; |
| 91 | 91 | |
| 92 | 92 | #ifdef WILLOW_DEBUG |
| | 93 | +/* |
| | 94 | + * Helper classes for sockaddr_caster, see below. |
| | 95 | + */ |
| 93 | 96 | typedef mpl::map< |
| 94 | 97 | mpl::pair<sockaddr_in, mpl::int_<AF_INET> >, |
| 95 | 98 | mpl::pair<sockaddr_in6, mpl::int_<AF_INET6> >, |
| — | — | @@ -130,12 +133,33 @@ |
| 131 | 134 | |
| 132 | 135 | #endif |
| 133 | 136 | |
| | 137 | +/** |
| | 138 | + * Cast from one sockaddr type to another. If the conversion can be proved |
| | 139 | + * invalid at compile time (e.g. the from type is not a sockaddr), a compile |
| | 140 | + * time error will be generated. Otherwise an assertion failure will be |
| | 141 | + * triggered at runtime if the sa_family of the type being cast does not match |
| | 142 | + * the destination type. |
| | 143 | + * |
| | 144 | + * Usage: |
| | 145 | + * |
| | 146 | + * \code |
| | 147 | + * void f(sockaddr *s) { |
| | 148 | + * sockaddr_in *sin = sockaddr_cast<sockaddr_in *>(s); |
| | 149 | + * ... |
| | 150 | + * } |
| | 151 | + * \endcode |
| | 152 | + * |
| | 153 | + * \param To sockaddr type to cast to |
| | 154 | + * \param From sockaddr type to cast from |
| | 155 | + * \param f sockaddr struct to cast |
| | 156 | + * \returns the result of the cast |
| | 157 | + */ |
| 134 | 158 | template<typename To, typename From> |
| 135 | | -To sockaddr_cast(From from) { |
| | 159 | +To sockaddr_cast(From f) { |
| 136 | 160 | #ifdef WILLOW_DEBUG |
| 137 | | - return sockaddr_caster<To, From>::cast(from); |
| | 161 | + return sockaddr_caster<To, From>::cast(f); |
| 138 | 162 | #else |
| 139 | | - return reinterpret_cast<To>(from); |
| | 163 | + return reinterpret_cast<To>(f); |
| 140 | 164 | #endif |
| 141 | 165 | } |
| 142 | 166 | |