diff --git a/include/stdex/uuid.hpp b/include/stdex/uuid.hpp index af8fed641..1fadb4fec 100644 --- a/include/stdex/uuid.hpp +++ b/include/stdex/uuid.hpp @@ -7,6 +7,7 @@ #include "assert.hpp" #include "compat.hpp" +#include "string.hpp" #include #include #if defined(_WIN32) @@ -70,4 +71,100 @@ namespace stdex static_cast(id[10]), static_cast(id[11]), static_cast(id[12]), static_cast(id[13]), static_cast(id[14]), static_cast(id[15])); #endif } + + /// + /// Parses string for GUID in a form of {xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx} + /// + /// \param[in] str String + /// \param[in] count Code unit count limit + /// \param[out] id GUID to read + /// + /// \returns true if parse was successful; false otherwise. + /// + template inline _Success_(return != 0) bool strtouuid( + _In_reads_or_z_opt_(count) const T* str, + _In_ size_t count, + _Out_ uuid_t& id) + { + size_t i = 0, j; + uint64_t n; + + for (; i < count && str[i] && stdex::isspace(str[i]); ++i); + if (i >= count || str[i] != '{') return false; + ++i; + for (; i < count && str[i] && stdex::isspace(str[i]); ++i); + n = stdex::strtou64(&str[i], count - i, &j, 16); + if (n > UINT32_MAX) return false; +#ifdef _WIN32 + id.Data1 = static_cast(n); +#else + * reinterpret_cast(&id[0]) = static_cast(n); +#endif + i += j; + for (; i < count && str[i] && stdex::isspace(str[i]); ++i); + if (i >= count || str[i] != '-') return false; + ++i; + for (; i < count && str[i] && stdex::isspace(str[i]); ++i); + n = stdex::strtou64(&str[i], count - i, &j, 16); + if (n > UINT16_MAX) return false; +#ifdef _WIN32 + id.Data2 = static_cast(n); +#else + * reinterpret_cast(&id[4]) = static_cast(n); +#endif + i += j; + for (; i < count && str[i] && stdex::isspace(str[i]); ++i); + if (i >= count || str[i] != '-') return false; + ++i; + for (; i < count && str[i] && stdex::isspace(str[i]); ++i); + n = stdex::strtou64(&str[i], count - i, &j, 16); + if (n > UINT16_MAX) return false; +#ifdef _WIN32 + id.Data3 = static_cast(n); +#else + * reinterpret_cast(&id[6]) = static_cast(n); +#endif + i += j; + for (; i < count && str[i] && stdex::isspace(str[i]); ++i); + if (i >= count || str[i] != '-') return false; + ++i; + for (; i < count && str[i] && stdex::isspace(str[i]); ++i); + n = stdex::strtou64(&str[i], count - i, &j, 16); + if (n > UINT16_MAX) return false; +#ifdef _WIN32 + id.Data4[0] = static_cast((n >> 8) & 0xff); + id.Data4[1] = static_cast((n) & 0xff); +#else + id[8] = static_cast((n >> 8) & 0xff); + id[9] = static_cast((n) & 0xff); +#endif + i += j; + for (; i < count && str[i] && stdex::isspace(str[i]); ++i); + if (i >= count && str[i] != '-') return false; + ++i; + for (; i < count && str[i] && stdex::isspace(str[i]); ++i); + n = stdex::strtou64(&str[i], count - i, &j, 16); + if (n > 0xffffffffffff) return false; +#ifdef _WIN32 + id.Data4[2] = static_cast((n >> 40) & 0xff); + id.Data4[3] = static_cast((n >> 32) & 0xff); + id.Data4[4] = static_cast((n >> 24) & 0xff); + id.Data4[5] = static_cast((n >> 16) & 0xff); + id.Data4[6] = static_cast((n >> 8) & 0xff); + id.Data4[7] = static_cast((n) & 0xff); +#else + id[10] = static_cast((n >> 40) & 0xff); + id[11] = static_cast((n >> 32) & 0xff); + id[12] = static_cast((n >> 24) & 0xff); + id[13] = static_cast((n >> 16) & 0xff); + id[14] = static_cast((n >> 8) & 0xff); + id[15] = static_cast((n) & 0xff); +#endif + i += j; + for (; i < count && str[i] && stdex::isspace(str[i]); ++i); + if (i >= count || str[i] != '}') return false; + ++i; + for (; i < count && str[i] && stdex::isspace(str[i]); ++i); + return i >= count || !str[i]; + } }